IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 1 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF MEAN DAILY TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MAX-MIN 1961 2.8 4.0 7.8 13.4 22.6 26.2 29.9 26.8 24.1 17.0 10.3 7.0 27.1 1962 4.2 6.8 12.2 13.3 20.6 25.0 28.7 26.6 22.3 17.4 8.9 6.1 24.5 1963 7.5 8.3 9.3 15.9 17.7 26.0 29.8 28.3 25.2 19.1 10.3 2.8 27.0 1964 -3.7 4.6 11.7 13.3 21.6 27.1 30.3 29.4 24.6 16.0 9.4 0.9 34.0 1965 0.5 4.5 9.5 13.7 22.3 26.0 28.8 28.3 23.4 17.2 12.0 6.3 28.3 1966 8.2 8.5 9.8 15.0 20.8 27.6 28.7 29.1 24.2 16.2 11.5 6.9 22.2 1967 4.1 2.6 8.1 12.6 20.5 25.0 29.3 29.2 24.5 17.3 11.3 5.0 26.7 1968 3.0 4.0 9.3 14.2 20.1 24.4 28.4 28.6 25.0 18.6 10.7 6.0 25.6 1969 -0.3 1.7 10.4 14.3 20.9 ****** 28.0 26.8 22.4 18.5 8.0 7.2 ****** 1970 2.8 7.6 9.6 17.7 22.1 27.2 28.8 29.6 24.3 18.1 13.9 4.7 26.8 1971 4.0 4.7 11.3 13.7 22.9 26.4 29.8 29.3 23.8 17.1 10.6 5.8 25.8 1972 -2.0 -1.1 6.2 15.9 16.8 25.3 28.7 25.5 24.9 20.3 11.0 0.9 30.7 1973 -1.2 6.4 9.0 14.4 20.2 27.1 29.5 28.9 24.0 19.4 9.6 3.7 30.7 1974 -0.8 0.4 9.8 13.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 5.8 ****** 11.5 ****** ****** 23.4 28.5 28.0 23.5 16.8 ****** 8.1 ****** 1982 3.9 1.8 7.5 18.0 21.3 26.1 27.8 26.7 23.0 17.0 8.0 2.3 26.0 1983 -0.1 3.9 ****** 13.7 20.6 25.9 29.7 29.0 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.1 2.8 8.3 16.5 19.6 26.0 29.4 29.0 24.6 17.9 11.7 4.5 26.6 1992 0.4 3.2 4.9 13.8 16.5 24.8 30.4 26.6 22.8 17.7 12.2 ****** ****** 1993 1.2 ****** 7.5 15.5 19.6 26.1 28.7 28.1 25.9 16.3 7.9 6.4 ****** 1994 5.3 4.9 11.2 16.9 20.2 26.3 30.1 30.3 22.3 16.6 11.6 3.2 27.1 1995 6.2 7.0 10.9 15.6 19.9 25.2 31.3 30.8 24.3 17.0 12.8 3.6 27.7 1996 1.8 5.9 6.2 13.9 21.2 26.7 28.6 28.9 26.5 17.4 10.6 7.8 27.1 1997 5.8 4.8 7.1 15.1 21.0 26.8 31.1 30.8 24.8 20.0 10.2 5.6 26.3 1998 1.9 4.2 9.3 17.1 20.5 27.9 29.6 29.1 25.2 18.9 15.0 10.4 27.7 1999 4.5 8.7 9.8 16.2 22.7 28.1 28.0 29.8 25.2 19.6 9.5 7.0 25.3 2000 4.3 5.6 9.5 19.3 24.2 27.5 29.3 29.6 26.2 16.7 9.2 5.6 25.3 MEAN 2.7 4.6 9.1 15.1 20.7 26.2 29.3 28.6 24.3 17.8 10.7 5.3 26.6 SD 2.95 2.49 1.84 1.74 1.78 1.15 0.90 1.38 1.15 1.23 1.78 2.30 1.72 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 2 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF MINIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 -1.2 -0.5 2.5 8.2 16.8 20.1 24.6 21.4 18.6 11.6 5.0 2.2 10.8 1962 0.1 2.2 6.5 8.1 15.1 19.3 23.1 21.0 16.5 11.9 3.8 1.8 10.8 1963 2.9 3.6 3.9 10.5 12.3 20.0 24.2 22.7 19.4 14.0 5.5 -1.4 11.5 1964 -8.6 0.1 6.9 8.1 15.5 21.8 24.6 23.9 19.1 10.6 4.0 -3.7 10.2 1965 -2.5 0.0 5.0 8.8 16.7 20.2 23.3 22.9 18.1 12.7 7.4 1.6 11.2 1966 3.7 4.3 5.3 10.0 15.9 22.0 23.5 23.8 18.9 11.8 6.4 2.7 12.4 1967 0.0 -1.4 2.8 7.8 15.3 19.4 23.9 23.8 19.5 12.2 7.0 0.8 10.9 1968 -1.0 -0.2 5.3 9.7 14.9 18.5 22.9 23.1 19.3 13.6 6.9 2.5 11.3 1969 -3.6 -1.9 6.7 9.7 15.5 ****** 22.6 21.3 17.0 13.5 3.2 2.8 ****** 1970 -0.9 2.4 4.9 12.5 16.3 21.1 23.6 23.9 18.5 12.3 8.6 0.6 12.0 1971 -0.5 0.2 6.3 8.9 17.4 20.6 24.3 23.8 18.1 11.4 6.0 1.7 11.5 1972 -6.4 -6.1 1.4 10.1 11.3 19.2 23.0 19.8 19.2 14.5 5.7 -2.7 9.1 1973 -5.7 1.4 3.3 8.6 13.7 21.0 23.7 23.2 18.0 13.4 2.7 -1.4 10.2 1974 -4.6 -3.6 5.4 7.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 1.0 ****** 6.6 9.7 14.3 18.3 22.3 22.8 17.1 11.2 ****** 3.0 ****** 1982 -0.6 -3.3 2.9 12.5 15.8 20.3 22.2 21.5 17.2 11.3 4.6 -3.2 10.1 1983 -4.8 -1.3 ****** 8.5 15.2 19.9 23.8 23.9 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 0.1 -0.5 4.9 12.0 14.6 20.9 24.6 24.1 19.9 13.8 7.9 1.5 12.0 1992 -2.5 -0.1 1.3 9.4 12.3 19.8 25.8 21.9 17.8 12.9 8.3 ****** ****** 1993 -1.9 ****** 3.8 11.2 15.2 21.0 24.0 23.3 21.2 12.2 4.8 3.2 ****** 1994 2.1 1.5 7.4 12.3 15.3 21.1 25.2 25.5 17.7 12.6 8.2 0.0 12.4 1995 2.6 3.5 6.7 11.2 15.2 20.1 26.2 26.0 19.6 12.9 8.4 0.4 12.7 1996 -0.8 2.5 3.1 9.8 16.5 21.8 23.9 24.3 21.8 12.8 6.7 4.4 12.2 1997 2.4 0.7 3.3 10.7 16.4 22.0 26.4 26.1 20.2 15.7 7.3 2.7 12.8 1998 -0.9 0.9 5.5 12.6 15.9 23.2 24.7 24.4 20.7 14.6 11.0 7.1 13.3 1999 1.4 4.9 6.0 11.7 17.6 23.0 23.2 25.1 20.6 15.2 6.2 3.9 13.2 2000 1.2 1.7 5.2 14.8 19.3 22.4 24.6 24.9 21.7 13.0 6.2 3.1 13.2 MEAN -1.1 0.5 4.7 10.2 15.4 20.7 24.0 23.4 19.0 12.9 6.3 1.4 11.5 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 3 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF MAXIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 6.9 8.6 13.1 18.5 28.4 32.2 35.3 32.3 29.7 22.4 15.6 11.8 21.2 1962 8.3 11.5 17.9 18.6 26.1 30.7 34.3 32.1 28.1 22.9 13.9 10.4 21.2 1963 12.0 13.0 14.6 21.2 23.1 32.1 35.4 33.8 30.9 24.1 15.2 6.9 21.9 1964 1.2 9.2 16.5 18.5 27.6 32.5 36.0 34.9 30.1 21.5 14.7 5.4 20.7 1965 3.6 8.9 13.9 18.6 27.9 31.7 34.3 33.7 28.7 21.6 16.7 10.9 20.9 1966 12.7 12.8 14.3 19.9 25.6 33.2 34.0 34.4 29.5 20.6 16.6 11.1 22.1 1967 8.3 6.6 13.4 17.3 25.7 30.5 34.7 34.6 29.4 22.4 15.5 9.3 20.6 1968 7.0 8.2 13.4 18.8 25.3 30.2 33.9 34.0 30.8 23.7 14.5 9.5 20.8 1969 3.0 5.2 14.0 18.9 26.2 ****** 33.5 32.2 27.8 23.5 12.9 11.6 ****** 1970 6.5 12.7 14.3 22.9 27.8 33.3 34.0 35.2 30.0 23.9 19.1 8.8 22.4 1971 8.5 9.2 16.3 18.6 28.4 32.2 35.3 34.7 29.5 22.9 15.2 9.9 21.7 1972 2.3 3.9 11.1 21.7 22.3 31.5 34.5 31.1 30.5 26.1 16.4 4.6 19.7 1973 3.3 11.5 14.6 20.1 26.6 33.3 35.4 34.6 29.9 25.3 16.5 8.8 21.7 1974 2.9 4.3 14.2 18.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 9.6 ****** 17.3 ****** ****** 28.7 32.8 32.4 29.7 21.8 ****** 12.9 ****** 1982 8.3 6.9 12.3 23.6 26.7 31.7 33.5 32.0 28.9 22.5 11.6 6.4 20.4 1983 4.8 9.2 ****** 18.9 25.9 32.0 35.5 34.2 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 6.1 6.2 11.6 21.0 24.7 31.0 34.2 33.8 29.3 22.0 15.4 7.4 20.2 1992 3.3 6.6 8.4 18.2 20.7 29.8 35.1 31.3 27.7 22.5 16.2 ****** ****** 1993 4.3 ****** 11.2 19.8 24.0 31.1 33.4 32.8 30.7 20.5 11.0 9.5 ****** 1994 8.4 8.2 15.1 21.6 25.0 31.4 35.0 35.0 27.0 20.5 15.1 6.3 20.7 1995 9.9 10.5 15.1 19.9 24.6 30.3 36.3 35.6 29.0 21.2 17.1 6.7 21.4 1996 4.5 9.2 9.4 18.1 26.0 31.6 33.2 33.6 31.2 21.9 14.5 11.2 20.4 1997 9.2 8.9 11.0 19.5 25.6 31.7 35.7 35.6 29.3 24.3 13.1 8.5 21.0 1998 4.7 7.5 13.1 21.6 25.2 32.5 34.5 33.7 29.8 23.3 19.1 13.7 21.6 1999 7.6 12.5 13.6 20.7 27.8 33.2 32.9 34.5 29.9 24.0 12.8 10.2 21.6 2000 7.4 9.4 13.7 23.8 29.1 32.6 34.0 34.2 30.7 20.5 12.2 8.2 21.3 MEAN 6.5 8.8 13.6 20.0 25.8 31.6 34.5 33.7 29.5 22.6 15.0 9.2 20.9 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 4 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 8.1 9.1 10.6 10.3 11.6 12.1 10.7 10.9 11.1 10.8 10.6 9.6 10.5 1962 8.2 9.3 11.4 10.5 11.0 11.4 11.2 11.1 11.6 11.0 10.1 8.6 10.4 1963 9.1 9.4 10.7 10.7 10.8 12.1 11.2 11.1 11.5 10.1 9.7 8.3 10.4 1964 9.8 9.1 9.6 10.4 12.1 10.7 11.4 11.0 11.0 10.9 10.7 9.1 10.5 1965 6.1 8.9 8.9 9.8 11.2 11.5 11.0 10.8 10.6 8.9 9.3 9.3 9.7 1966 9.0 8.5 9.0 9.9 9.7 11.2 10.5 10.6 10.6 8.8 10.2 8.4 9.7 1967 8.3 8.0 10.6 9.5 10.4 11.1 10.8 10.8 9.9 10.2 8.5 8.5 9.7 1968 8.0 8.4 8.1 9.1 10.4 11.7 11.0 10.9 11.5 10.1 7.6 7.0 9.5 1969 6.6 7.1 7.3 9.2 10.7 ****** 10.9 10.9 10.8 10.0 9.7 8.8 ****** 1970 7.4 10.3 9.4 10.4 11.5 12.2 10.4 11.3 11.5 11.6 10.5 8.2 10.4 1971 9.0 9.0 10.0 9.7 11.0 11.6 11.0 10.9 11.4 11.5 9.2 8.2 10.2 1972 8.7 10.0 9.7 11.6 11.0 12.3 11.5 11.3 11.3 11.6 10.7 7.3 10.6 1973 9.0 10.1 11.3 11.5 12.9 12.3 11.7 11.4 11.9 11.9 13.8 10.2 11.5 1974 7.5 7.9 8.8 11.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 8.6 ****** 10.7 ****** ****** 10.4 10.5 9.6 12.6 10.6 ****** 9.9 ****** 1982 8.9 10.2 9.4 11.1 10.9 11.4 11.3 10.5 11.7 11.2 7.0 9.6 10.3 1983 9.6 10.5 ****** 10.4 10.7 12.1 11.7 10.3 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 6.0 6.7 6.7 9.0 10.1 10.1 9.6 9.7 9.4 8.2 7.5 5.9 8.2 1992 5.8 6.7 7.1 8.8 8.4 10.0 9.3 9.4 9.9 9.6 7.9 ****** ****** 1993 6.2 ****** 7.4 8.6 8.8 10.1 9.4 9.5 9.5 8.3 6.2 6.3 ****** 1994 6.3 6.7 7.7 9.3 9.7 10.3 9.8 9.5 9.3 7.9 6.9 6.3 8.3 1995 7.3 7.0 8.4 8.7 9.4 10.2 10.1 9.6 9.4 8.3 8.7 6.3 8.6 1996 5.3 6.7 6.3 8.3 9.5 9.8 9.3 9.3 9.4 9.1 7.8 6.8 8.1 1997 6.8 8.2 7.7 8.8 9.2 9.7 9.3 9.5 9.1 8.6 5.8 5.8 8.2 1998 5.6 6.6 7.6 9.0 9.3 9.3 9.8 9.3 9.1 8.7 8.1 6.6 8.2 1999 6.2 7.6 7.6 9.0 10.2 10.2 9.7 9.4 9.3 8.8 6.6 6.3 8.4 2000 6.2 7.7 8.5 9.0 9.8 10.2 9.4 9.3 9.0 7.5 6.0 5.1 8.1 MEAN 7.5 8.4 8.9 9.8 10.4 11.0 10.5 10.3 10.5 9.8 8.7 7.8 9.5 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 5 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 03 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 3.68 3.29 2.99 5.16 5.28 5.70 6.64 6.32 5.30 3.27 3.00 3.08 4.47 1962 3.16 3.30 3.21 5.24 5.88 6.62 6.99 6.53 3.95 3.99 3.58 3.81 4.69 1963 3.51 3.08 3.14 5.04 6.69 5.73 6.39 6.77 3.79 4.68 3.80 3.05 4.64 1964 1.19 2.98 3.88 3.65 3.94 5.51 6.61 5.25 4.24 3.03 3.00 2.78 3.84 1965 3.42 3.06 3.93 3.74 4.39 5.82 6.24 5.04 4.72 5.82 4.02 2.71 4.41 1966 3.46 3.10 3.79 4.97 5.70 4.99 6.25 4.98 4.76 6.34 3.08 3.07 4.54 1967 2.77 3.02 2.92 4.35 5.61 4.33 6.83 4.36 4.78 4.37 4.61 2.95 4.24 1968 3.05 2.95 3.88 5.14 6.55 6.63 6.02 5.74 3.65 4.52 5.51 4.02 4.81 1969 3.01 3.23 5.23 5.31 6.30 ****** 7.90 6.53 4.82 5.81 3.83 3.56 ****** 1970 3.22 3.03 3.61 4.48 5.13 5.05 7.77 6.51 4.76 3.09 3.90 3.08 4.47 1971 2.55 2.93 4.28 5.07 6.00 5.68 6.02 5.51 4.40 3.78 4.70 3.17 4.51 1972 2.75 2.86 3.92 4.87 6.36 7.14 6.64 6.09 3.78 3.99 3.62 3.03 4.59 1973 2.31 3.34 2.80 3.83 5.21 5.83 7.01 5.69 4.89 3.44 3.10 2.68 4.18 1974 2.78 2.96 4.74 4.29 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 4.96 ****** 8.22 10.83 14.19 16.21 21.02 19.14 13.12 8.79 ****** 5.12 ****** 1982 4.25 3.69 5.44 10.28 13.90 15.11 12.83 14.36 10.25 9.09 6.12 3.39 9.06 1983 3.22 4.03 ****** 7.71 11.10 13.06 15.20 15.15 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.40 3.04 4.58 4.51 5.33 5.78 6.47 5.93 5.58 5.23 3.84 3.42 4.76 1992 2.62 2.58 3.25 4.41 6.10 6.10 6.47 6.59 4.22 3.92 3.92 ****** ****** 1993 2.57 ****** 3.12 4.53 5.49 5.31 6.86 6.66 5.22 4.06 5.16 4.10 ****** 1994 3.87 3.07 3.86 4.72 5.39 5.75 6.53 5.52 4.89 5.98 5.23 2.99 4.82 1995 3.40 3.45 3.35 5.11 5.62 6.42 6.58 6.06 5.54 4.52 2.93 3.05 4.67 1996 3.09 4.07 4.06 4.99 6.65 6.23 6.39 6.29 4.81 4.85 3.66 3.38 4.87 1997 2.87 2.18 3.36 3.74 4.40 6.46 7.32 5.16 4.83 4.80 5.12 4.27 4.54 1998 3.22 3.41 3.99 5.07 6.32 7.75 10.16 8.94 6.98 5.59 4.65 4.58 5.89 1999 3.99 3.41 3.68 5.62 6.19 6.98 9.39 8.04 6.56 5.64 4.77 4.15 5.70 2000 3.35 3.23 3.52 5.48 5.94 6.81 8.43 8.22 7.78 6.19 5.16 4.66 5.73 MEAN 3.18 3.18 3.96 5.27 6.53 7.08 8.12 7.37 5.51 5.00 4.18 3.51 5.23 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 6 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 09 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 3.85 3.53 2.74 4.49 4.21 4.94 6.35 6.35 5.99 3.85 3.10 3.31 4.39 1962 3.29 3.09 2.92 4.98 5.49 5.57 6.10 6.23 4.83 4.38 3.51 4.07 4.54 1963 3.66 3.03 2.74 4.66 5.51 4.82 7.09 6.96 4.38 4.97 3.86 3.65 4.61 1964 2.37 3.37 3.69 3.44 3.54 5.40 6.85 5.64 5.09 3.67 3.28 3.22 4.13 1965 3.60 2.98 4.21 3.58 4.10 5.28 6.24 5.51 5.45 5.62 4.20 3.12 4.49 1966 3.65 3.22 3.81 4.36 5.37 4.97 6.14 5.76 5.30 6.40 3.40 3.41 4.65 1967 3.16 3.29 2.67 3.77 5.07 4.44 7.09 5.73 5.61 4.90 5.01 3.40 4.51 1968 2.94 3.28 3.82 4.86 5.94 6.00 5.97 6.62 4.43 4.83 6.22 4.19 4.93 1969 3.38 3.69 5.78 5.18 5.79 ****** 8.51 7.24 5.33 6.00 3.80 3.72 ****** 1970 3.92 2.85 3.78 4.54 4.74 5.43 7.64 7.75 5.75 3.68 4.07 3.51 4.81 1971 3.40 3.20 3.79 5.41 5.70 6.01 6.68 6.07 5.08 4.10 4.86 3.42 4.81 1972 3.17 3.38 4.30 4.76 6.25 6.79 7.35 6.29 4.79 4.24 3.79 3.40 4.87 1973 2.62 3.69 2.91 3.57 4.69 5.40 7.08 6.49 5.99 3.93 2.84 2.61 4.32 1974 3.38 3.74 5.06 4.51 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 6.69 ****** 10.49 13.00 18.48 16.89 24.86 24.81 16.97 10.01 ****** 5.95 ****** 1982 5.02 4.82 6.66 11.90 14.01 16.10 12.80 14.46 11.40 10.10 7.52 5.53 10.03 1983 4.55 5.43 ****** 8.23 11.23 13.23 15.54 17.78 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.65 3.26 4.95 3.95 4.41 4.77 5.59 5.53 6.24 4.62 3.83 3.18 4.50 1992 2.73 2.66 3.31 3.87 5.39 5.12 5.55 5.91 4.08 3.63 3.81 ****** ****** 1993 2.73 ****** 2.77 3.69 4.45 4.94 6.03 5.81 4.41 3.49 4.98 4.03 ****** 1994 3.98 2.89 3.43 4.21 4.07 4.77 6.08 5.45 4.66 5.67 4.79 2.95 4.41 1995 3.10 3.27 3.14 4.79 5.14 5.79 6.63 5.16 4.43 4.24 2.83 3.27 4.32 1996 3.41 4.14 4.14 4.67 6.15 5.26 5.97 5.39 4.57 4.33 3.25 3.41 4.56 1997 2.91 2.10 3.06 3.92 4.44 5.98 7.72 5.37 4.07 4.09 4.84 4.32 4.40 1998 3.40 3.36 3.72 4.69 5.61 6.80 10.36 7.99 6.62 5.49 4.97 4.91 5.66 1999 3.82 3.44 3.83 5.70 6.29 6.94 8.74 7.50 7.13 6.01 5.10 4.27 5.73 2000 3.49 3.34 3.73 5.79 5.88 7.21 8.76 8.85 8.41 6.66 5.38 4.95 6.04 MEAN 3.56 3.41 4.06 5.21 6.23 6.76 8.22 7.80 6.04 5.16 4.31 3.83 5.38 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 7 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 15 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 4.07 3.68 2.80 4.50 4.21 4.89 6.35 6.18 5.59 3.68 3.08 3.43 4.37 1962 3.44 3.27 3.27 4.96 4.99 5.21 5.81 5.95 5.01 4.72 3.59 3.89 4.51 1963 3.82 3.29 2.89 4.42 5.28 4.12 6.12 6.70 4.96 4.81 4.02 3.62 4.50 1964 1.65 3.38 3.59 3.00 3.24 4.51 6.43 5.17 4.81 3.44 3.29 3.02 3.79 1965 3.51 3.02 3.95 3.19 4.16 4.30 5.64 5.29 5.01 5.85 4.05 3.17 4.26 1966 3.60 3.48 3.76 4.87 4.76 4.30 5.72 6.02 5.60 6.41 3.34 3.47 4.61 1967 3.17 3.15 2.80 4.11 4.67 4.07 6.63 6.07 5.39 4.81 4.80 3.34 4.42 1968 3.05 3.35 3.47 4.63 5.75 5.13 6.18 7.82 4.21 4.56 6.38 4.42 4.91 1969 3.20 3.81 5.86 5.27 5.52 ****** 8.26 7.15 5.61 6.20 4.03 4.17 ****** 1970 3.64 2.99 3.97 4.36 3.83 5.12 7.20 7.29 5.92 3.56 3.84 3.70 4.62 1971 3.49 3.25 3.89 4.59 5.61 5.56 6.82 6.29 6.02 4.25 4.77 3.62 4.85 1972 3.12 3.38 4.05 4.47 5.94 5.97 6.97 6.19 5.08 4.89 3.93 3.58 4.80 1973 3.10 3.91 3.02 3.33 3.97 5.43 7.51 7.31 6.02 4.15 2.95 3.10 4.48 1974 3.38 3.54 4.94 4.76 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 5.79 ****** 10.29 12.87 17.11 18.20 27.66 24.51 18.32 10.44 ****** 5.50 ****** 1982 4.75 4.46 6.02 11.46 14.23 17.86 14.47 15.84 12.54 9.98 6.82 4.07 10.21 1983 3.37 4.40 ****** 8.16 10.66 14.49 18.75 19.79 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.74 3.20 4.87 3.90 4.22 4.29 5.31 5.38 5.70 4.78 3.99 3.38 4.40 1992 2.65 2.70 3.32 3.62 5.20 4.72 5.08 5.76 4.04 4.14 4.19 ****** ****** 1993 2.77 ****** 2.64 3.67 4.29 3.43 5.65 5.74 4.60 3.80 5.04 4.49 ****** 1994 4.05 3.04 3.41 4.02 4.04 4.30 5.89 5.46 4.57 6.13 5.31 2.91 4.43 1995 3.19 3.21 2.92 4.61 5.06 4.56 5.40 4.58 4.24 4.10 2.89 3.13 3.99 1996 3.18 3.91 4.13 4.38 5.60 4.93 5.87 4.93 4.53 4.41 3.28 3.20 4.36 1997 2.81 1.91 3.04 3.58 4.13 5.00 6.62 5.09 4.11 4.45 5.30 4.61 4.22 1998 3.47 3.33 3.82 4.63 5.58 6.67 10.10 7.68 6.81 5.38 5.07 5.05 5.63 1999 3.75 3.35 3.70 5.10 5.80 6.26 8.11 7.35 6.71 5.61 4.81 4.41 5.41 2000 3.54 3.27 3.47 5.26 5.25 6.66 8.10 8.16 7.98 6.25 5.34 5.01 5.69 MEAN 3.46 3.38 4.00 5.03 5.89 6.40 8.18 7.84 6.14 5.24 4.34 3.85 5.31 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 8 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. ABSOLUTE OF MINIMUM TEMPERATURE WITH DAY YEAR JAN. DAY FEB. DAY MAR. DAY APR. DAY MAY DAY JUNE DAY JULY DAY AUG. DAY SEP. DAY OCT. DAY NOV. DAY DEC. DAY ANNUAL 1961 -6.5 31 -9.5 1 -3.2 4 1.0 17 9.2 1 10.7 7 21.0 3 18.0 9 14.7 20 5.2 27 -2.7 24 -1.2 27 -9.5 1962 -3.0 14 -2.2 11 -2.0 13 3.8 6 7.2 12 10.5 11 20.7 25 17.2 11 10.2 27 5.5 12 -3.5 30 -2.5 1 -3.5 1963 -2.0 9 -2.0 5 -4.7 8 5.5 1 7.0 4 16.5 13 18.5 1 18.2 23 11.0 14 9.0 31 -0.5 28 -13.0 28 -13.0 1964 -14.0 20 -5.5 1 1.0 8 0.7 15 6.5 2 19.5 16 20.5 1 20.0 21 15.5 22 4.7 29 -7.0 29 -7.2 15 -14.0 1965 -5.5 23 -5.0 3 -2.5 16 -1.0 6 6.5 4 17.5 7 20.2 7 20.2 10 13.0 23 6.5 27 3.2 30 -4.0 21 -5.5 1966 -1.7 14 1.0 8 -0.5 21 5.2 5 10.7 8 18.7 15 18.7 7 21.0 17 11.1 30 8.2 27 1.0 27 -1.5 24 -1.7 1967 -4.5 24 -11.7 3 -4.7 3 -6.4 2 8.5 1 8.2 6 18.2 6 20.0 29 13.2 26 6.2 23 -2.4 30 -6.0 25 -11.7 1968 -9.0 23 -6.5 8 -3.5 24 2.0 4 11.0 3 11.2 18 16.5 13 13.2 21 15.0 20 5.5 29 3.0 19 -0.5 23 -9.0 1969 -12.5 8 -8.2 3 -0.5 24 0.0 14 9.7 9 ***** ** 17.2 10 15.0 31 10.0 15 5.5 31 -3.2 18 -1.0 28 ***** 1970 -8.5 29 -4.5 2 1.0 6 3.5 25 8.0 8 15.0 11 18.0 6 20.2 11 12.5 19 5.5 25 3.5 30 -4.5 17 -8.5 1971 -4.5 27 -4.7 2 -1.2 16 1.2 3 13.0 2 15.0 6 19.0 25 20.0 1 13.2 20 8.2 28 3.0 16 -4.0 23 -4.7 1972 -15.5 24 -12.0 2 -1.7 20 3.0 3 5.2 8 15.2 17 20.5 28 14.7 26 14.0 19 6.2 31 3.0 9 -10.5 24 -15.5 1973 -12.5 2 -6.5 7 -2.5 10 3.7 20 8.0 24 13.2 14 21.5 3 19.5 16 10.2 27 9.2 14 -4.0 8 -6.7 14 -12.5 1974 -8.0 19 -9.0 3 -3.5 7 1.5 3 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1975 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1976 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1977 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1978 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1979 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1980 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1981 -2.0 23 ***** ** -1.0 4 3.0 7 7.0 5 14.0 7 18.0 8 21.0 19 9.8 24 7.0 16 ***** ** 0.0 20 ***** 1982 -6.1 23 -9.0 18 -3.5 1 5.5 10 11.5 24 15.4 2 17.0 1 18.6 23 10.5 4 7.0 11 -3.6 30 -8.5 10 -9.0 1983 -12.5 27 -8.5 23 ***** ** 1.6 2 9.5 3 16.2 9 19.2 1 18.9 27 ***** ** ***** ** ***** ** ***** ** ***** 1984 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1985 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1986 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1987 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1988 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1989 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1990 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1991 -4.0 28 -8.0 13 -3.6 11 5.0 13 8.0 6 16.6 19 20.0 15 20.2 28 11.8 28 11.2 16 3.0 28 -3.5 22 -8.0 1992 -8.0 28 -5.2 12 -6.0 11 3.5 3 4.5 5 15.0 9 21.5 12 15.0 31 11.0 2 9.5 18 -1.2 28 ***** ** ***** 1993 -5.4 21 ***** ** -3.0 23 6.5 14 8.6 9 15.6 22 22.0 17 20.2 25 15.8 27 6.8 8 -1.5 15 -1.6 6 ***** 1994 -1.0 12 -3.6 4 2.4 17 2.0 5 8.5 7 11.8 5 17.8 1 23.0 10 14.5 21 9.0 25 2.0 26 -7.2 7 -7.2 1995 -1.0 21 -1.0 25 1.7 27 5.5 7 9.2 9 14.0 1 21.7 1 19.5 31 12.5 22 7.0 19 -1.8 26 -2.5 20 -2.5 1996 -6.6 19 -3.0 6 -1.4 1 3.5 5 12.0 8 16.4 28 19.0 15 20.0 30 16.6 24 7.0 17 0.8 13 0.6 3 -6.6 1997 -7.4 29 -6.4 7 -4.4 8 0.5 12 9.5 6 17.2 2 21.0 7 22.0 29 13.6 15 10.0 25 2.6 27 -1.0 28 -7.4 1998 -6.4 14 -5.6 28 -2.8 3 3.8 6 8.6 4 18.4 2 20.4 25 17.5 4 16.6 13 7.5 11 8.0 25 2.0 5 -6.4 1999 -2.5 3 -1.0 9 -0.4 18 5.2 10 11.2 5 20.0 6 17.0 15 21.6 31 12.5 28 7.0 27 -1.0 30 -1.0 2 -2.5 2000 -5.0 18 -3.0 8 -2.0 3 10.0 1 14.5 2 12.0 13 21.5 27 21.6 12 17.5 30 8.5 4 2.2 11 0.6 16 -5.0 LOW. -15.5 24 -12.0 2 -6.0 11 -6.4 2 4.5 5 8.2 6 16.5 13 13.2 21 9.8 24 4.7 29 -7.0 29 -13.0 28 -15.5 YEAR 1972 1972 1992 1967 1992 1967 1968 1968 1981 1964 1964 1963 1972 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 9 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. ABSOLUTE OF MAXIMUM TEMPERATURE WITH DAY YEAR JAN. DAY FEB. DAY MAR. DAY APR. DAY MAY DAY JUNE DAY JULY DAY AUG. DAY SEP. DAY OCT. DAY NOV. DAY DEC. DAY ANNUAL 1961 16.0 19 14.7 8 20.5 25 28.2 28 32.7 24 36.5 20 38.5 11 35.2 20 34.0 1 28.0 1 21.2 5 16.0 9 38.5 1962 11.5 30 17.0 20 23.7 24 24.0 9 30.5 18 34.0 29 37.0 5 38.0 1 33.0 3 29.0 8 21.2 1 17.0 21 38.0 1963 16.5 29 19.0 20 22.5 25 26.0 9 28.0 24 35.0 27 39.0 18 37.2 13 35.2 4 28.5 2 21.3 2 17.0 23 39.0 1964 6.0 16 14.2 22 24.0 26 26.0 6 31.5 31 34.7 26 39.5 11 38.5 14 34.0 5 29.2 2 19.5 20 10.5 8 39.5 1965 8.0 28 16.5 28 22.7 11 26.7 27 36.0 18 33.7 28 39.5 14 36.5 14 33.2 1 26.7 13 21.0 4 16.5 15 39.5 1966 16.5 25 18.7 27 20.0 9 26.5 20 32.5 24 35.7 10 38.5 24 37.5 31 34.4 8 25.7 7 21.7 1 17.7 9 38.5 1967 15.5 16 14.7 24 18.2 27 24.7 24 30.2 25 34.0 17 39.0 7 37.0 21 36.0 4 25.0 11 23.7 1 16.2 15 39.0 1968 14.7 14 17.7 29 21.2 14 26.5 18 31.0 21 35.5 28 38.0 5 38.5 17 35.5 4 29.0 4 18.5 8 13.7 1 38.5 1969 11.0 21 15.0 27 21.5 31 26.0 1 31.5 27 ***** ** 37.7 16 39.7 6 33.2 9 30.5 6 19.0 2 18.5 5 ***** 1970 9.5 18 16.7 18 26.0 31 28.0 19 34.5 27 38.5 30 38.7 31 37.5 5 39.0 9 32.2 1 23.5 1 16.0 5 39.0 1971 16.5 4 15.7 22 22.0 18 24.0 27 31.7 28 36.0 22 39.5 6 37.2 6 35.7 2 27.0 16 20.5 4 15.5 1 39.5 1972 9.5 19 10.5 19 18.0 30 27.5 30 28.2 27 39.0 24 36.7 6 35.7 16 34.7 2 30.2 1 19.5 2 10.0 13 39.0 1973 8.0 29 20.0 19 20.7 2 27.5 27 32.0 29 38.0 28 40.2 15 38.2 4 34.7 1 29.5 7 23.5 2 15.0 4 40.2 1974 5.0 23 9.5 14 24.5 20 26.2 23 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1975 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1976 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1977 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1978 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1979 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1980 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1981 14.0 5 ***** ** 22.0 25 ***** ** ***** ** 32.0 24 37.5 19 35.0 8 33.6 14 26.2 4 ***** ** 17.2 16 ***** 1982 13.6 11 12.1 4 17.0 18 29.0 27 31.5 19 36.8 8 36.2 17 36.8 5 32.0 5 25.0 1 17.0 7 10.0 20 36.8 1983 11.0 21 11.9 26 ***** ** 24.0 18 30.1 17 35.1 18 37.5 5 38.6 16 ***** ** ***** ** ***** ** ***** ** ***** 1984 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1985 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1986 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1987 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1988 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1989 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1990 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1991 9.6 31 12.5 28 19.5 30 27.5 22 29.5 29 35.6 29 37.0 7 38.5 6 35.0 8 24.6 27 22.5 3 13.0 10 38.5 1992 8.2 2 12.4 22 17.5 29 25.0 21 29.4 30 35.8 30 38.4 5 35.5 25 30.6 25 26.2 13 20.6 2 ***** ** ***** 1993 12.4 29 ***** ** 20.4 30 27.4 19 29.2 19 36.0 29 36.8 3 36.2 14 34.5 4 29.0 1 17.6 3 14.5 26 ***** 1994 16.0 3 14.8 27 22.0 31 29.0 22 31.0 31 34.4 16 38.8 30 38.0 1 34.0 1 23.6 2 19.5 3 12.6 3 38.8 1995 15.0 31 15.2 4 20.6 24 25.0 3 29.6 22 34.4 29 41.0 16 38.5 5 32.7 11 29.5 4 22.6 2 12.0 1 41.0 1996 10.5 3 16.0 10 21.7 31 23.0 22 32.5 31 36.0 4 35.7 3 36.2 11 35.2 17 25.8 1 19.5 6 16.0 28 36.2 1997 14.4 7 14.4 18 17.0 22 28.0 26 33.0 28 35.0 27 38.8 14 38.8 15 35.0 1 28.8 4 16.4 5 13.0 8 38.8 1998 8.2 30 15.0 7 19.6 28 28.6 15 31.0 11 36.4 28 39.2 11 37.0 17 34.2 2 30.5 1 22.4 1 17.6 11 39.2 1999 11.0 30 17.0 27 19.5 26 26.5 30 34.6 31 36.0 1 37.4 4 36.6 25 33.2 11 29.0 6 18.2 19 16.6 29 37.4 2000 16.2 1 16.2 24 19.0 30 28.4 20 33.0 26 37.5 30 37.4 11 38.0 3 35.4 8 25.5 11 19.8 3 11.0 22 38.0 HIG. 16.5 29 20.0 19 26.0 31 29.0 27 36.0 18 39.0 24 41.0 16 39.7 6 39.0 9 32.2 1 23.7 1 18.5 5 41.0 YEAR 1963 1973 1970 1982 1965 1972 1995 1969 1970 1970 1967 1969 1995 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 10 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. 24 HOUR MAXIMUM PRECIPITATION. YEAR JAN. DAY FEB. DAY MAR. DAY APR. DAY MAY DAY JUNE DAY JULY DAY AUG. DAY SEP. DAY OCT. DAY NOV. DAY DEC. DAY ANNUAL 1961 16.0 3 14.0 28 15.6 13 6.7 26 0.0 ** 0.0 ** 1.2 18 1.2 1 0.0 ** 0.0 ** 0.0 ** 9.0 14 16.0 1962 5.0 3 18.3 8 9.5 1 50.4 21 1.8 15 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 50.4 1963 2.8 28 3.5 12 4.5 20 5.5 30 9.5 2 1.0 29 0.0 ** 10.0 3 1.5 10 5.5 20 15.0 3 20.0 25 20.0 1964 0.0 ** 13.0 2 3.5 12 10.0 12 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 10.5 25 12.0 13 13.0 1965 26.0 11 8.0 14 16.5 2 7.5 1 4.0 11 0.0 ** 0.0 ** 0.0 ** 1.5 30 6.0 1 7.5 9 11.0 30 26.0 1966 9.0 30 28.0 2 16.5 1 8.0 18 8.0 6 1.0 4 0.0 ** 0.0 ** 8.0 30 7.0 25 0.0 ** 7.0 27 28.0 1967 3.6 4 10.0 22 9.0 8 7.0 1 6.0 15 0.0 ** 0.0 ** 0.0 ** 0.0 ** 5.0 12 7.5 25 5.5 4 10.0 1968 14.0 22 16.0 3 10.5 17 19.0 2 22.5 30 7.0 23 0.0 ** 0.0 ** 0.0 ** 8.0 25 16.5 17 8.5 7 22.5 1969 39.0 23 9.0 2 20.5 15 19.5 13 0.0 ** ***** ** 2.0 11 9.0 26 4.5 12 10.0 30 12.0 3 11.0 27 ***** 1970 19.3 27 0.0 ** 15.5 11 19.5 23 7.5 7 0.0 ** 4.0 18 0.0 ** 0.0 ** 0.0 ** 16.2 28 20.5 12 20.5 1971 10.5 15 12.0 13 3.5 19 16.5 24 1.5 19 0.0 ** 0.5 31 0.0 ** 0.0 ** 2.8 27 15.0 19 16.0 30 16.5 1972 13.0 7 18.5 20 25.0 21 8.5 5 10.0 10 10.2 17 0.2 16 4.0 24 0.0 ** 0.5 9 18.0 29 12.5 12 25.0 1973 9.0 17 32.0 22 4.0 3 7.0 17 0.2 11 0.2 9 0.0 ** 0.0 ** 0.0 ** 0.0 ** 13.7 23 11.0 30 32.0 1974 14.0 14 13.0 18 9.0 4 9.5 5 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1975 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1976 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1977 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1978 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1979 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1980 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1981 0.0 ** ***** ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 4.0 22 0.0 ** 0.0 ** 0.0 ** ***** ** 0.0 ** ***** 1982 3.5 7 0.0 ** 3.0 18 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 3.0 4 2.0 9 0.0 ** 3.5 1983 0.0 ** 0.0 ** ***** ** 0.0 ** 2.2 29 0.0 ** 0.0 ** 0.0 ** ***** ** ***** ** ***** ** ***** ** ***** 1984 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1985 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1986 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1987 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1988 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1989 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1990 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1991 9.0 22 11.0 21 31.0 6 13.0 4 2.0 3 4.0 19 0.0 ** 0.0 ** 0.0 ** 1.0 15 0.0 ** 20.0 9 31.0 1992 13.0 31 18.3 25 15.0 15 24.9 27 21.8 2 5.0 3 0.0 ** 4.0 29 0.0 ** 0.2 8 6.0 8 ***** ** ***** 1993 22.0 8 ***** ** 17.0 8 8.0 8 3.0 14 1.0 1 0.0 ** 1.0 29 0.0 ** 3.0 29 16.0 3 13.0 16 ***** 1994 12.0 17 37.0 1 14.0 12 15.0 30 12.0 6 2.0 3 0.0 ** 0.0 ** 0.0 ** 23.0 4 37.0 26 3.0 1 37.0 1995 4.1 17 11.0 24 16.0 17 31.0 24 4.2 26 2.0 1 0.0 ** 0.0 ** 0.8 22 3.3 25 0.0 ** 6.0 13 31.0 1996 11.0 19 30.0 2 60.0 2 30.0 3 13.0 8 14.0 28 0.4 12 0.0 ** 0.0 ** 11.0 16 0.3 9 9.1 22 60.0 1997 6.0 16 3.0 19 10.0 4 6.0 6 0.3 5 8.0 24 0.6 6 0.0 ** 0.0 ** 0.4 7 18.0 2 25.0 10 25.0 1998 22.0 6 18.0 12 32.0 30 21.0 6 7.0 4 0.0 ** 2.0 30 16.0 4 2.0 14 4.0 11 1.0 11 41.0 4 41.0 1999 14.0 10 7.0 8 15.4 21 3.0 24 1.0 10 0.0 ** 5.0 14 0.0 ** 0.2 27 11.4 27 22.0 11 8.0 10 22.0 2000 18.0 28 29.0 14 7.0 23 1.0 22 0.6 24 0.0 ** 0.8 13 0.0 ** 2.0 6 19.0 17 6.0 30 29.0 1 29.0 HIG. 39.0 23 37.0 1 60.0 2 50.4 21 22.5 30 14.0 28 5.0 14 16.0 4 8.0 30 23.0 4 37.0 26 41.0 4 60.0 YEAR 1969 1994 1996 1962 1968 1996 1999 1998 1966 1994 1994 1998 1996 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 11 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY TOTAL PRECIPITATION WITH SEASONAL PERCENT. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL SEASONAL-PERCENT ----------------------- 1961 57.4 36.2 21.1 17.4 0.0 0.0 1.2 2.4 0.0 0.0 0.0 12.5 148.2 77.4 11.7 2.4 8.4 1962 18.4 64.4 9.5 161.5 4.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 257.8 35.8 64.2 0.0 0.0 1963 5.8 6.0 13.0 8.1 60.9 1.0 0.0 21.0 1.5 7.5 24.0 74.2 223.0 11.1 31.4 10.1 47.4 1964 0.0 22.1 8.5 22.5 0.0 0.0 0.0 0.0 0.0 0.0 16.0 22.0 91.1 33.6 24.7 0.0 41.7 1965 111.5 8.0 26.5 8.0 7.0 0.0 0.0 0.0 1.5 23.3 15.0 13.0 213.8 68.3 7.0 0.7 24.0 1966 21.0 30.0 44.2 22.5 15.5 1.0 0.0 0.0 8.0 31.5 0.0 16.0 189.7 50.2 20.6 4.2 25.0 1967 4.1 25.0 9.0 35.5 13.5 0.0 0.0 0.0 0.0 10.5 21.0 6.0 124.6 30.6 39.3 0.0 30.1 1968 25.5 30.5 38.5 38.0 36.0 13.5 0.0 0.0 0.0 9.0 63.5 36.0 290.5 32.5 30.1 0.0 37.3 1969 107.5 37.5 116.4 35.5 0.0 ****** 2.5 9.5 7.5 35.1 15.7 24.9 ****** 66.7 9.1 5.0 19.3 1970 36.3 0.0 45.4 21.5 11.8 0.0 4.5 0.0 0.0 0.0 24.4 57.5 201.4 40.6 16.5 2.2 40.7 1971 23.5 35.6 8.5 66.0 3.0 0.0 0.5 0.0 0.0 3.0 40.3 28.3 208.7 32.4 33.1 0.2 34.3 1972 46.2 57.5 116.3 21.5 35.1 10.9 0.2 9.0 0.0 1.2 46.5 62.0 406.4 54.1 16.6 2.3 27.0 1973 26.5 65.0 5.5 21.5 0.2 0.2 0.0 0.0 0.0 0.0 17.7 34.0 170.6 56.9 12.8 0.0 30.3 1974 73.0 63.5 36.3 40.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** 80.9 19.1 ***** ***** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1981 0.0 ****** 0.0 0.0 0.0 0.0 4.0 0.0 0.0 0.0 ****** 0.0 ****** 0.0 0.0 100.0 0.0 1982 7.0 0.0 3.0 0.0 0.0 0.0 0.0 0.0 0.0 5.0 2.0 0.0 17.0 58.8 0.0 0.0 41.2 1983 0.0 0.0 ****** 0.0 7.5 0.0 0.0 0.0 ****** ****** ****** ****** ****** 0.0 100.0 0.0 ***** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1991 22.1 33.7 124.5 22.6 8.7 4.0 0.0 0.0 0.0 2.3 0.0 74.9 292.8 61.6 12.1 0.0 26.4 1992 39.7 37.1 78.2 48.4 63.6 12.2 0.0 4.0 0.0 0.2 6.1 ****** ****** 53.5 42.9 1.4 2.2 1993 39.9 ****** 60.3 24.9 8.8 2.0 0.0 1.0 0.0 5.1 66.5 19.2 ****** 44.0 15.7 0.4 39.9 1994 53.4 51.6 30.6 19.2 38.5 3.0 0.0 0.0 0.0 35.7 146.8 6.2 385.0 35.2 15.8 0.0 49.0 1995 6.5 19.6 31.2 44.2 16.4 2.4 0.0 0.0 0.8 4.2 0.0 23.7 149.0 38.5 42.3 0.5 18.7 1996 76.6 91.5 182.4 68.5 38.4 15.4 0.4 0.0 0.0 22.4 0.3 15.1 511.0 68.6 23.9 0.1 7.4 1997 7.0 5.0 55.4 12.6 0.3 11.3 0.6 0.0 0.0 1.0 35.3 56.7 185.2 36.4 13.1 0.3 50.2 1998 66.3 58.4 77.6 44.7 31.1 0.0 2.4 17.6 3.0 4.8 1.4 61.3 368.6 54.9 20.6 6.2 18.3 1999 43.2 16.1 53.2 5.3 1.0 0.0 13.3 0.0 0.2 18.4 66.6 26.0 243.3 46.2 2.6 5.5 45.6 2000 45.1 43.5 17.6 1.6 0.6 0.0 0.8 0.0 2.8 48.5 23.3 83.4 267.2 39.7 0.8 1.3 58.1 MEAN 35.7 33.5 46.6 30.1 15.5 3.1 1.2 2.5 1.0 10.7 26.4 31.4 237.7 48.8 20.4 1.9 28.8 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 12 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. NO. OF DAYS WITH PRECIPITATION YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 9 6 3 6 0 0 1 2 0 0 0 2 29 1962 8 5 1 12 3 0 0 0 0 0 0 0 29 1963 3 3 5 3 13 1 0 3 1 3 2 8 45 1964 0 4 4 3 0 0 0 0 0 0 2 3 16 1965 8 1 4 2 2 0 0 0 1 8 4 2 32 1966 3 2 6 9 4 1 0 0 1 8 0 4 38 1967 2 5 1 7 3 0 0 0 0 5 4 2 29 1968 6 3 6 5 7 4 0 0 0 2 10 9 52 1969 11 8 20 7 0 *** 2 2 3 12 3 5 *** 1970 7 0 8 2 5 0 2 0 0 0 3 4 31 1971 4 8 5 10 2 0 1 0 0 2 9 7 48 1972 9 5 12 5 14 3 1 3 0 3 3 10 68 1973 7 6 3 6 1 1 0 0 0 0 2 6 32 1974 14 11 9 9 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 0 0 0 1 0 0 0 *** 0 *** 1982 3 0 1 0 0 0 0 0 0 2 1 0 7 1983 0 0 *** 0 6 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 10 14 14 5 6 1 0 0 0 4 0 12 66 1992 10 11 13 10 16 8 0 1 0 1 2 *** *** 1993 7 *** 10 7 8 2 0 1 0 2 13 5 *** 1994 9 4 8 7 6 2 0 0 0 8 15 5 64 1995 4 8 7 9 11 3 0 0 1 2 0 6 51 1996 12 14 15 11 8 3 1 0 0 3 1 2 70 1997 2 2 11 5 1 4 1 0 0 3 9 10 48 1998 9 9 12 8 10 0 2 3 3 2 2 4 64 1999 7 5 8 5 1 0 4 0 1 3 6 6 46 2000 10 5 4 3 1 0 1 0 2 9 12 10 57 MEAN 6 6 7 6 5 1 1 1 1 3 4 5 46 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 13 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. NO. OF DAYS PRECIPITATION EQUAL OR MORE THAN 1 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 9 4 2 4 0 0 1 2 0 0 0 2 24 1962 7 5 1 12 3 0 0 0 0 0 0 0 28 1963 2 3 5 3 13 1 0 3 1 2 2 8 43 1964 0 4 3 3 0 0 0 0 0 0 2 3 15 1965 8 1 4 1 2 0 0 0 1 7 3 2 29 1966 3 2 6 6 4 1 0 0 1 8 0 4 35 1967 1 5 1 7 3 0 0 0 0 4 4 1 26 1968 5 3 6 4 6 3 0 0 0 2 10 9 48 1969 11 8 20 7 0 *** 1 1 2 11 2 3 *** 1970 6 0 6 2 3 0 1 0 0 0 3 4 25 1971 4 6 4 10 2 0 0 0 0 1 7 7 41 1972 8 5 12 4 7 1 0 3 0 0 3 9 52 1973 7 6 2 5 0 0 0 0 0 0 2 5 27 1974 13 11 8 8 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 0 0 0 1 0 0 0 *** 0 *** 1982 3 0 1 0 0 0 0 0 0 2 1 0 7 1983 0 0 *** 0 4 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 6 7 12 3 5 1 0 0 0 1 0 10 45 1992 7 6 12 8 11 4 0 1 0 0 1 *** *** 1993 6 *** 9 6 5 2 0 1 0 2 10 3 *** 1994 8 4 7 4 5 2 0 0 0 4 12 2 48 1995 2 4 6 5 7 1 0 0 0 1 0 6 32 1996 12 10 13 8 6 2 0 0 0 2 0 2 55 1997 2 2 7 2 0 3 0 0 0 0 6 6 28 1998 7 7 10 6 8 0 1 2 1 1 1 3 47 1999 6 4 6 2 1 0 3 0 0 3 5 5 35 2000 8 4 3 1 0 0 0 0 1 6 8 7 38 MEAN 6 4 6 4 4 1 0 1 0 2 3 4 35 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 14 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. NO. OF DAYS PRECIPITATION EQUAL OR MORE THAN 10 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 2 2 1 0 0 0 0 0 0 0 0 0 5 1962 0 4 0 5 0 0 0 0 0 0 0 0 9 1963 0 0 0 0 0 0 0 1 0 0 1 4 6 1964 0 1 0 1 0 0 0 0 0 0 1 1 4 1965 6 0 1 0 0 0 0 0 0 0 0 1 8 1966 0 1 3 0 0 0 0 0 0 0 0 0 4 1967 0 1 0 0 0 0 0 0 0 0 0 0 1 1968 1 2 2 2 1 0 0 0 0 0 2 0 10 1969 4 0 4 1 0 *** 0 0 0 1 1 2 *** 1970 1 0 2 1 0 0 0 0 0 0 1 3 8 1971 1 2 0 3 0 0 0 0 0 0 1 1 8 1972 1 3 7 0 1 1 0 0 0 0 3 3 19 1973 0 3 0 0 0 0 0 0 0 0 1 2 6 1974 2 1 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 0 0 0 0 0 0 0 *** 0 *** 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 0 0 *** 0 0 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 1 5 1 0 0 0 0 0 0 0 4 11 1992 1 2 3 1 2 0 0 0 0 0 0 *** *** 1993 1 *** 3 0 0 0 0 0 0 0 2 1 *** 1994 2 1 1 1 2 0 0 0 0 1 5 0 13 1995 0 1 1 1 0 0 0 0 0 0 0 0 3 1996 2 5 5 2 2 1 0 0 0 2 0 0 19 1997 0 0 4 0 0 0 0 0 0 0 1 3 8 1998 3 3 2 1 0 0 0 1 0 0 0 2 12 1999 2 0 2 0 0 0 0 0 0 1 4 0 9 2000 1 2 0 0 0 0 0 0 0 2 0 3 8 MEAN 1 1 2 1 0 0 0 0 0 0 1 1 7 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 15 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 03 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 81 71 51 57 32 27 26 31 31 31 43 54 45 1962 64 59 42 60 40 35 29 32 25 36 53 67 45 1963 58 49 48 49 57 28 25 31 22 38 53 66 44 1964 41 61 50 43 25 25 26 23 25 32 44 71 39 1965 83 63 58 43 28 28 27 23 30 53 49 50 45 1966 56 49 56 52 40 22 27 21 29 61 40 54 42 1967 59 67 50 53 39 23 29 19 29 40 59 55 44 1968 69 64 58 56 48 37 26 26 22 39 72 73 49 1969 77 76 69 58 44 *** 36 33 34 52 63 62 *** 1970 72 55 55 41 35 25 36 27 30 29 46 61 43 1971 55 61 57 57 37 27 26 25 29 36 65 57 44 1972 83 82 72 49 58 36 29 32 22 32 50 70 51 1973 66 60 43 42 38 27 28 25 30 27 48 61 41 1974 78 78 67 52 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 88 *** 88 88 83 80 79 77 74 74 *** 81 *** 1982 86 86 79 76 79 69 49 63 60 80 90 81 75 1983 83 78 *** 75 66 55 55 60 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 70 65 66 41 41 29 27 26 33 44 49 63 46 1992 65 55 61 48 56 32 25 33 28 36 46 *** *** 1993 64 *** 52 45 41 28 29 30 28 39 74 69 *** 1994 69 59 51 42 39 29 26 22 31 54 62 60 45 1995 59 58 44 49 41 33 23 22 32 41 33 63 42 1996 68 71 70 52 44 30 27 27 24 43 48 53 46 1997 51 41 56 37 30 31 27 20 27 36 65 75 41 1998 70 66 57 44 43 34 41 39 38 45 47 60 49 1999 75 52 53 51 38 31 44 33 37 43 66 68 49 2000 65 61 50 42 33 33 35 35 41 56 71 80 50 MEAN 69 63 58 52 44 34 33 32 32 44 56 65 49 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 16 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 09 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 63 51 30 34 17 17 18 21 22 22 27 38 30 1962 49 37 22 39 25 20 18 21 20 25 32 52 30 1963 41 33 27 30 32 16 20 21 16 26 34 59 30 1964 57 48 32 28 15 17 19 16 18 23 31 58 30 1965 70 41 42 27 17 18 18 17 22 33 34 36 31 1966 40 34 39 30 27 16 18 17 20 42 27 40 29 1967 45 53 27 33 25 18 21 16 22 28 42 43 31 1968 49 48 39 38 30 23 18 21 16 28 58 53 35 1969 71 65 61 39 27 *** 26 24 23 35 39 44 *** 1970 65 31 41 27 20 17 23 22 22 19 30 49 31 1971 49 46 33 41 23 20 19 18 19 22 44 45 32 1972 71 64 56 29 37 25 21 22 17 19 33 61 38 1973 53 45 29 26 21 16 20 18 23 18 25 39 28 1974 70 70 53 37 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 83 *** 81 83 84 62 71 71 59 57 *** 60 *** 1982 72 77 71 61 61 53 38 46 43 54 82 88 62 1983 82 73 *** 61 52 42 40 48 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 60 55 58 27 24 18 17 17 24 28 34 48 34 1992 53 42 46 31 41 19 16 22 17 21 32 *** *** 1993 53 *** 35 27 25 17 19 19 16 24 58 52 *** 1994 55 42 33 27 21 17 18 16 21 36 43 46 31 1995 39 42 30 33 27 22 18 14 18 27 22 53 29 1996 62 59 59 37 30 19 18 17 16 26 30 40 34 1997 38 28 38 29 22 20 21 15 16 21 49 59 30 1998 61 54 41 29 29 22 30 24 25 31 36 48 36 1999 56 38 41 37 27 22 29 21 28 33 53 53 37 2000 53 46 39 30 22 24 26 27 30 45 59 68 39 MEAN 58 49 42 36 30 23 24 24 23 30 40 51 36 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 17 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 15 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 78 61 35 38 18 16 18 21 24 27 34 49 35 1962 58 45 28 44 25 19 17 21 23 32 42 57 34 1963 52 40 31 31 35 14 17 22 20 29 44 70 34 1964 49 56 34 28 15 15 17 15 20 27 40 66 32 1965 78 48 44 27 20 15 17 17 24 42 40 45 35 1966 45 42 40 38 27 14 17 18 25 48 35 50 33 1967 55 55 33 39 24 15 19 18 23 35 50 52 35 1968 57 57 38 38 33 20 19 25 17 31 71 69 40 1969 76 75 62 44 31 *** 27 26 28 44 51 61 *** 1970 68 39 45 30 19 17 23 21 26 24 36 63 34 1971 63 53 38 39 26 19 20 19 26 29 52 57 37 1972 83 78 60 31 41 24 21 23 22 28 42 74 44 1973 76 56 34 26 20 18 22 23 28 25 33 59 35 1974 83 76 57 41 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 88 *** 89 90 87 73 82 80 76 77 *** 74 *** 1982 81 82 81 70 72 63 46 55 57 68 90 86 71 1983 83 77 *** 73 57 49 54 61 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 66 57 56 27 24 16 15 17 23 31 40 56 36 1992 57 47 49 31 37 19 14 20 18 28 40 *** *** 1993 59 *** 34 28 24 12 17 18 18 29 64 64 *** 1994 61 46 34 27 22 15 16 15 21 44 51 49 33 1995 44 42 29 33 28 17 14 12 18 28 25 55 29 1996 64 58 61 37 29 17 18 15 16 29 34 40 35 1997 39 27 37 26 21 17 17 13 17 25 59 69 31 1998 67 55 42 30 30 21 28 23 26 32 40 55 37 1999 59 39 40 34 25 19 25 21 26 33 56 62 37 2000 59 47 36 29 20 21 23 23 30 46 64 77 40 MEAN 65 54 45 38 31 23 24 25 26 36 47 61 40 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 18 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. NO. OF DAYS MINIMUM TEMPERATURE EQUAL OR LESS THAN -4 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 3 4 0 0 0 0 0 0 0 0 0 0 7 1962 0 0 0 0 0 0 0 0 0 0 0 0 0 1963 0 0 1 0 0 0 0 0 0 0 0 6 7 1964 28 1 0 0 0 0 0 0 0 0 3 16 48 1965 10 2 0 0 0 0 0 0 0 0 0 1 13 1966 0 0 0 0 0 0 0 0 0 0 0 0 0 1967 2 6 1 1 0 0 0 0 0 0 0 4 14 1968 6 6 0 0 0 0 0 0 0 0 0 0 12 1969 13 8 0 0 0 *** 0 0 0 0 0 0 *** 1970 4 1 0 0 0 0 0 0 0 0 0 2 7 1971 1 2 0 0 0 0 0 0 0 0 0 2 5 1972 24 18 0 0 0 0 0 0 0 0 0 11 53 1973 20 2 0 0 0 0 0 0 0 0 1 5 28 1974 19 11 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 0 0 0 0 0 0 0 *** 0 *** 1982 8 10 0 0 0 0 0 0 0 0 0 9 27 1983 12 5 *** 0 0 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 1 6 0 0 0 0 0 0 0 0 0 0 7 1992 12 3 4 0 0 0 0 0 0 0 0 *** *** 1993 7 *** 0 0 0 0 0 0 0 0 0 0 *** 1994 0 0 0 0 0 0 0 0 0 0 0 7 7 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 1996 8 0 0 0 0 0 0 0 0 0 0 0 8 1997 1 4 1 0 0 0 0 0 0 0 0 0 6 1998 3 2 0 0 0 0 0 0 0 0 0 0 5 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 1 0 0 0 0 0 0 0 0 0 0 0 1 MEAN 7 4 0 0 0 0 0 0 0 0 0 3 14 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 19 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. NO. OF DAYS MINIMUM TEMPERATURE EQUAL OR MORE THAN 21 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 0 0 0 0 1 16 31 17 4 0 0 0 69 1962 0 0 0 0 0 12 30 15 2 0 0 0 59 1963 0 0 0 0 0 11 27 26 9 0 0 0 73 1964 0 0 0 0 4 21 30 28 11 0 0 0 94 1965 0 0 0 0 4 11 30 27 5 0 0 0 77 1966 0 0 0 0 1 22 27 31 8 0 0 0 89 1967 0 0 0 0 0 12 30 29 10 0 0 0 81 1968 0 0 0 0 0 6 28 24 6 0 0 0 64 1969 0 0 0 0 2 *** 23 21 3 0 0 0 *** 1970 0 0 0 0 3 15 27 30 9 0 0 0 84 1971 0 0 0 0 2 20 28 27 9 0 0 0 86 1972 0 0 0 0 0 6 29 11 8 0 0 0 54 1973 0 0 0 0 1 15 31 28 5 0 0 0 80 1974 0 0 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 0 1 6 12 23 4 0 *** 0 *** 1982 0 0 0 0 0 13 19 15 0 0 0 0 47 1983 0 0 *** 0 0 10 26 24 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 0 0 0 0 16 30 29 14 0 0 0 89 1992 0 0 0 0 0 10 31 22 0 0 0 *** *** 1993 0 *** 0 0 2 19 31 29 19 0 0 0 *** 1994 0 0 0 0 0 17 29 31 2 0 0 0 79 1995 0 0 0 0 0 12 31 30 13 0 0 0 86 1996 0 0 0 0 2 20 29 29 21 0 0 0 101 1997 0 0 0 0 2 22 31 31 9 1 0 0 96 1998 0 0 0 0 2 27 30 27 15 1 0 0 102 1999 0 0 0 0 8 26 24 31 19 0 0 0 108 2000 0 0 0 0 9 24 31 31 18 0 0 0 113 MEAN 0 0 0 0 2 16 28 26 9 0 0 0 81 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 20 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. NO. OF DAYS MAXIMUM TEMPERATURE EQUAL OR LESS THAN 0 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 0 0 0 0 0 0 0 0 0 0 0 0 0 1962 0 0 0 0 0 0 0 0 0 0 0 0 0 1963 0 0 0 0 0 0 0 0 0 0 0 3 3 1964 11 0 0 0 0 0 0 0 0 0 0 0 11 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 1966 0 0 0 0 0 0 0 0 0 0 0 0 0 1967 0 1 0 0 0 0 0 0 0 0 0 0 1 1968 0 1 0 0 0 0 0 0 0 0 0 0 1 1969 9 0 0 0 0 *** 0 0 0 0 0 0 *** 1970 0 0 0 0 0 0 0 0 0 0 0 0 0 1971 0 0 0 0 0 0 0 0 0 0 0 0 0 1972 8 6 0 0 0 0 0 0 0 0 0 4 18 1973 5 0 0 0 0 0 0 0 0 0 0 0 5 1974 2 5 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 *** *** 0 0 0 0 0 *** 0 *** 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 4 0 *** 0 0 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 3 0 0 0 0 0 0 0 0 0 0 3 1992 5 0 1 0 0 0 0 0 0 0 0 *** *** 1993 2 *** 0 0 0 0 0 0 0 0 0 0 *** 1994 0 0 0 0 0 0 0 0 0 0 0 3 3 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 1996 5 0 0 0 0 0 0 0 0 0 0 0 5 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 1998 1 1 1 0 0 0 0 0 0 0 0 0 3 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 0 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 2 1 0 0 0 0 0 0 0 0 0 0 3 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 21 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. NO. OF DAYS MAXIMUM TEMPERATURE EQUAL OR MORE THAN 30 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 0 0 0 0 9 25 31 30 11 0 0 0 106 1962 0 0 0 0 2 19 31 27 11 0 0 0 90 1963 0 0 0 0 0 25 31 31 21 0 0 0 108 1964 0 0 0 0 7 30 31 29 14 0 0 0 111 1965 0 0 0 0 12 27 31 29 13 0 0 0 112 1966 0 0 0 0 1 30 30 31 10 0 0 0 102 1967 0 0 0 0 2 20 30 31 12 0 0 0 95 1968 0 0 0 0 3 16 30 29 22 0 0 0 100 1969 0 0 0 0 4 *** 26 24 10 4 0 0 *** 1970 0 0 0 0 11 26 30 31 16 2 0 0 116 1971 0 0 0 0 7 25 31 30 13 0 0 0 106 1972 0 0 0 0 0 21 31 22 16 1 0 0 91 1973 0 0 0 0 6 24 31 31 18 0 0 0 110 1974 0 0 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 *** *** 8 23 26 11 0 *** 0 *** 1982 0 0 0 0 3 21 28 25 11 0 0 0 88 1983 0 0 *** 0 2 26 28 26 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 0 0 0 0 23 31 30 18 0 0 0 102 1992 0 0 0 0 0 13 31 24 2 0 0 *** *** 1993 0 *** 0 0 0 20 31 29 19 0 0 0 *** 1994 0 0 0 0 4 25 31 31 5 0 0 0 96 1995 0 0 0 0 0 19 31 31 16 0 0 0 97 1996 0 0 0 0 4 24 31 29 23 0 0 0 111 1997 0 0 0 0 6 25 31 31 11 0 0 0 104 1998 0 0 0 0 1 26 30 28 17 1 0 0 103 1999 0 0 0 0 8 29 25 31 19 0 0 0 112 2000 0 0 0 0 12 24 31 31 19 0 0 0 117 MEAN 0 0 0 0 4 23 30 29 14 0 0 0 100 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 22 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. NO. OF DAYS MAXIMUM TEMPERATURE EQUAL OR MORE THAN 40 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 0 0 0 0 0 0 0 0 0 0 0 0 0 1962 0 0 0 0 0 0 0 0 0 0 0 0 0 1963 0 0 0 0 0 0 0 0 0 0 0 0 0 1964 0 0 0 0 0 0 0 0 0 0 0 0 0 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 1966 0 0 0 0 0 0 0 0 0 0 0 0 0 1967 0 0 0 0 0 0 0 0 0 0 0 0 0 1968 0 0 0 0 0 0 0 0 0 0 0 0 0 1969 0 0 0 0 0 *** 0 0 0 0 0 0 *** 1970 0 0 0 0 0 0 0 0 0 0 0 0 0 1971 0 0 0 0 0 0 0 0 0 0 0 0 0 1972 0 0 0 0 0 0 0 0 0 0 0 0 0 1973 0 0 0 0 0 0 1 0 0 0 0 0 1 1974 0 0 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 *** *** 0 0 0 0 0 *** 0 *** 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 0 0 *** 0 0 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 0 0 0 0 0 0 0 0 0 0 0 0 1992 0 0 0 0 0 0 0 0 0 0 0 *** *** 1993 0 *** 0 0 0 0 0 0 0 0 0 0 *** 1994 0 0 0 0 0 0 0 0 0 0 0 0 0 1995 0 0 0 0 0 0 1 0 0 0 0 0 1 1996 0 0 0 0 0 0 0 0 0 0 0 0 0 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 1998 0 0 0 0 0 0 0 0 0 0 0 0 0 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 0 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 0 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 23 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. NO. OF DAYS MAXIMUM TEMPERATURE EQUAL OR MORE THAN 45 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 0 0 0 0 0 0 0 0 0 0 0 0 0 1962 0 0 0 0 0 0 0 0 0 0 0 0 0 1963 0 0 0 0 0 0 0 0 0 0 0 0 0 1964 0 0 0 0 0 0 0 0 0 0 0 0 0 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 1966 0 0 0 0 0 0 0 0 0 0 0 0 0 1967 0 0 0 0 0 0 0 0 0 0 0 0 0 1968 0 0 0 0 0 0 0 0 0 0 0 0 0 1969 0 0 0 0 0 *** 0 0 0 0 0 0 *** 1970 0 0 0 0 0 0 0 0 0 0 0 0 0 1971 0 0 0 0 0 0 0 0 0 0 0 0 0 1972 0 0 0 0 0 0 0 0 0 0 0 0 0 1973 0 0 0 0 0 0 0 0 0 0 0 0 0 1974 0 0 0 0 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 *** *** 0 0 0 0 0 *** 0 *** 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 0 0 *** 0 0 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 0 0 0 0 0 0 0 0 0 0 0 0 1992 0 0 0 0 0 0 0 0 0 0 0 *** *** 1993 0 *** 0 0 0 0 0 0 0 0 0 0 *** 1994 0 0 0 0 0 0 0 0 0 0 0 0 0 1995 0 0 0 0 0 0 0 0 0 0 0 0 0 1996 0 0 0 0 0 0 0 0 0 0 0 0 0 1997 0 0 0 0 0 0 0 0 0 0 0 0 0 1998 0 0 0 0 0 0 0 0 0 0 0 0 0 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 0 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 0 0 0 0 0 0 0 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 24 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. NO. OF FREEZING DAYS , DATE OF START AND END FREEZING START END YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MO DAY MO DAY -------------- 1961 23 14 11 0 0 0 0 0 0 0 7 5 60 11 24 3 18 1962 16 7 1 0 0 0 0 0 0 0 8 11 43 11 17 3 13 1963 6 8 4 0 0 0 0 0 0 0 3 15 36 11 28 3 10 1964 30 16 0 0 0 0 0 0 0 0 4 29 79 11 27 2 28 1965 26 16 4 1 0 0 0 0 0 0 0 8 55 12 19 4 6 1966 2 0 2 0 0 0 0 0 0 0 0 5 9 12 22 3 24 1967 21 17 7 2 0 0 0 0 0 0 3 13 63 11 28 4 2 1968 16 15 3 0 0 0 0 0 0 0 0 4 38 12 13 3 25 1969 23 18 1 1 0 *** 0 0 0 0 7 5 *** 11 16 4 14 1970 19 8 0 0 0 0 0 0 0 0 0 18 45 12 10 2 24 1971 18 14 2 0 0 0 0 0 0 0 0 10 44 12 18 3 16 1972 31 27 9 0 0 0 0 0 0 0 0 20 87 12 2 3 28 1973 31 10 4 0 0 0 0 0 0 0 12 21 78 11 7 3 30 1974 31 24 6 0 *** *** *** *** *** *** *** *** *** 1 1 3 10 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1981 6 *** 1 0 0 0 0 0 0 0 *** 1 *** 12 20 3 4 1982 12 21 9 0 0 0 0 0 0 0 1 20 63 11 30 3 26 1983 19 15 *** 0 0 0 0 0 *** *** *** *** *** 1 1 2 28 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1991 18 15 2 0 0 0 0 0 0 0 0 16 51 12 16 3 12 1992 24 17 12 0 0 0 0 0 0 0 2 *** *** 11 27 3 25 1993 26 *** 6 0 0 0 0 0 0 0 4 3 *** 11 14 3 23 1994 6 8 0 0 0 0 0 0 0 0 0 16 30 12 5 2 20 1995 4 3 0 0 0 0 0 0 0 0 1 12 20 11 26 2 26 1996 19 6 5 0 0 0 0 0 0 0 0 0 30 1 10 3 20 1997 7 14 6 0 0 0 0 0 0 0 0 3 30 12 27 3 21 1998 20 12 3 0 0 0 0 0 0 0 0 0 35 1 3 3 3 1999 10 2 2 0 0 0 0 0 0 0 2 3 19 11 12 3 19 2000 14 9 2 0 0 0 0 0 0 0 0 0 25 1 9 3 16 MEAN 18 13 4 0 0 0 0 0 0 0 2 10 47 11 7 4 14 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 25 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 2.3 4.0 8.3 14.0 24.2 28.0 31.2 27.7 24.6 17.0 10.3 6.9 16.5 1962 3.7 6.6 12.8 13.6 21.8 26.4 29.9 27.2 22.9 17.7 8.8 5.9 16.4 1963 7.3 8.5 9.6 16.4 18.5 27.8 31.0 28.8 25.9 19.3 10.3 2.2 17.1 1964 -4.2 4.5 11.8 13.7 23.1 28.5 31.7 30.3 24.9 16.0 9.6 0.7 15.9 1965 0.1 4.5 9.5 14.0 23.0 27.4 29.8 29.0 23.5 17.1 12.0 6.3 16.4 1966 7.9 8.5 9.8 15.2 21.5 28.9 29.7 29.8 24.4 16.0 11.3 6.6 17.5 1967 3.7 2.6 8.4 12.5 21.3 25.9 30.1 29.7 24.6 17.1 11.2 4.8 16.0 1968 2.6 3.8 9.3 14.4 20.5 25.6 29.3 29.0 25.3 18.4 10.3 5.5 16.2 1969 -0.8 1.2 10.2 14.3 21.4 ****** 28.7 27.3 22.7 18.0 7.6 6.5 ****** 1970 2.3 7.4 9.5 17.7 23.2 28.4 29.4 30.2 24.3 18.0 13.3 4.1 17.3 1971 3.2 4.2 11.4 13.9 23.5 27.7 30.5 29.7 24.0 17.4 10.5 5.6 16.8 1972 -2.3 -0.8 6.3 16.8 17.3 26.3 29.8 26.1 25.2 20.5 10.8 0.5 14.7 1973 -1.3 6.7 9.5 15.0 21.6 28.5 30.7 29.6 24.1 19.8 9.7 3.3 16.4 1974 -1.0 0.2 9.9 13.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 5.0 ****** 13.4 16.1 ****** 25.3 29.7 29.2 24.5 17.4 ****** 8.1 ****** 1982 3.6 1.6 7.4 18.9 22.6 27.5 29.5 27.8 24.3 ****** 7.6 1.0 ****** 1983 -0.8 4.1 ****** 13.8 21.7 28.4 31.3 30.2 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.0 2.7 8.3 17.1 20.2 26.8 30.2 29.5 25.0 17.9 11.5 4.3 16.4 1992 0.2 3.1 4.9 14.1 16.8 26.0 31.2 27.1 23.2 17.7 12.0 ****** ****** 1993 0.9 ****** 7.7 15.8 20.3 27.2 29.6 28.9 26.3 16.3 7.7 6.4 ****** 1994 5.2 4.9 11.3 17.1 21.1 27.1 31.0 30.8 22.5 16.5 11.7 2.9 16.8 1995 6.3 6.9 11.0 16.0 20.6 26.4 32.4 32.0 24.9 17.3 12.8 3.4 17.5 1996 1.6 5.8 6.0 14.3 22.1 27.7 29.3 29.8 27.2 17.7 10.8 7.8 16.7 1997 6.1 5.2 7.5 15.3 21.6 27.9 32.0 31.6 25.2 20.2 10.1 5.5 17.3 1998 1.8 4.1 9.5 17.5 21.3 28.9 30.5 29.7 25.8 19.2 15.0 10.3 17.8 1999 4.6 8.8 10.0 16.5 23.5 29.1 28.7 30.4 25.5 20.0 9.4 6.8 17.8 2000 4.0 5.7 9.7 19.7 25.1 28.4 30.1 30.0 26.5 16.8 8.9 5.5 17.5 MEAN 2.4 4.6 9.3 15.5 21.5 27.4 30.3 29.3 24.7 17.9 10.5 5.0 16.5 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 26 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 -2.3 -3.7 -7.1 0.3 -0.3 1.9 4.9 4.5 2.8 -3.7 -5.9 -4.6 -1.1 1962 -4.5 -5.3 -5.3 1.0 2.6 3.1 4.7 4.3 -0.7 -0.6 -4.4 -2.4 -0.6 1963 -3.1 -5.5 -6.8 0.2 3.2 0.6 5.2 5.5 -0.9 0.6 -2.6 -4.2 -0.6 1964 -14.5 -4.6 -3.1 -4.6 -3.8 1.4 5.4 1.9 -0.1 -4.2 -4.9 -5.7 -3.1 1965 -3.7 -5.8 -2.1 -3.7 -1.5 1.4 4.0 2.1 1.5 3.1 -1.9 -5.8 -1.0 1966 -3.4 -4.8 -2.9 0.3 1.6 0.3 3.9 2.9 1.6 4.9 -4.7 -4.3 -0.4 1967 -5.6 -5.4 -6.7 -2.0 1.5 -1.3 5.7 2.1 2.0 0.1 0.6 -5.2 -1.2 1968 -6.2 -5.1 -3.2 1.0 3.7 3.6 4.0 5.1 -2.0 0.1 4.0 -1.1 0.3 1969 -5.1 -3.6 2.8 1.9 3.6 ****** 8.5 6.0 1.9 3.7 -2.6 -2.6 ****** 1970 -3.3 -5.9 -2.7 -0.3 -0.3 1.7 7.2 6.0 2.0 -4.0 -2.1 -4.0 -0.5 1971 -5.4 -5.3 -2.3 1.1 3.4 3.1 5.2 3.7 1.7 -1.9 0.4 -4.3 -0.0 1972 -5.6 -5.1 -1.5 0.3 4.4 5.0 5.9 4.2 -0.2 -1.1 -2.8 -5.1 -0.1 1973 -7.8 -3.1 -6.8 -3.8 -0.3 2.0 6.5 5.0 3.0 -2.3 -6.6 -6.8 -1.7 1974 -4.8 -4.1 0.9 -0.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 3.5 ****** 11.0 13.9 ****** 19.2 24.9 24.3 17.9 11.2 ****** 2.7 ****** 1982 0.4 -0.2 3.1 12.8 16.7 19.0 15.0 17.1 13.9 ****** 5.6 -0.4 ****** 1983 -3.7 0.1 ****** 8.0 12.8 16.0 18.4 20.1 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 -3.3 -5.2 0.4 -2.0 -0.5 0.4 3.3 2.6 3.0 0.9 -2.0 -4.8 -0.6 1992 -7.4 -7.6 -5.2 -2.5 2.6 1.9 2.9 3.8 -1.6 -2.5 -2.3 ****** ****** 1993 -7.0 ****** -7.4 -2.6 0.2 -1.2 4.3 4.1 0.4 -2.9 1.1 -0.9 ****** 1994 -2.1 -5.6 -4.1 -1.2 -0.6 0.7 4.4 2.3 0.0 3.0 0.9 -6.6 -0.7 1995 -4.9 -4.5 -6.1 0.3 1.6 2.6 4.2 1.9 0.5 -0.8 -6.9 -5.1 -1.4 1996 -4.9 -1.7 -1.4 0.0 4.1 1.8 4.2 2.4 -0.2 -0.2 -4.3 -4.6 -0.4 1997 -6.4 -11.1 -5.8 -3.4 -0.8 3.5 6.6 1.7 -1.0 -0.4 1.5 -0.5 -1.3 1998 -4.3 -4.3 -3.1 0.5 3.4 6.5 11.8 8.6 5.7 2.7 1.0 0.8 2.4 1999 -2.4 -4.3 -2.9 2.3 3.9 5.1 9.2 7.3 5.7 3.2 0.8 -1.0 2.2 2000 -4.0 -4.5 -3.9 2.4 3.0 6.0 8.9 8.8 8.3 4.6 1.9 1.0 2.7 MEAN -4.5 -4.6 -2.8 0.7 2.6 4.2 7.3 6.1 2.6 0.6 -1.5 -3.1 0.6 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 27 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 3.87 3.50 2.85 4.72 4.57 5.17 6.45 6.28 5.63 3.60 3.06 3.27 4.41 1962 3.28 3.22 3.13 5.06 5.45 5.80 6.30 6.23 4.60 4.36 3.56 3.92 4.58 1963 3.66 3.13 2.92 4.71 5.83 4.89 6.53 6.81 4.38 4.82 3.89 3.44 4.58 1964 1.74 3.24 3.72 3.36 3.57 5.14 6.63 5.36 4.71 3.38 3.19 3.01 3.92 1965 3.48 3.02 4.03 3.50 4.21 5.13 6.04 5.28 5.06 5.76 4.09 3.00 4.38 1966 3.57 3.27 3.79 4.74 5.31 4.75 6.03 5.59 5.22 6.39 3.27 3.32 4.60 1967 3.03 3.15 2.79 4.08 5.12 4.28 6.85 5.38 5.26 4.69 4.81 3.23 4.39 1968 3.02 3.20 3.73 4.88 6.08 5.92 6.06 6.73 4.10 4.64 6.04 4.21 4.88 1969 3.20 3.58 5.62 5.25 5.87 ****** 8.22 6.97 5.25 6.00 3.89 3.82 ****** 1970 3.59 2.96 3.79 4.46 4.56 5.20 7.54 7.19 5.48 3.45 3.94 3.43 4.63 1971 3.15 3.13 3.99 5.02 5.77 5.75 6.51 5.95 5.17 4.05 4.78 3.40 4.72 1972 3.01 3.21 4.09 4.70 6.19 6.63 6.99 6.22 4.55 4.37 3.78 3.35 4.76 1973 2.71 3.65 2.92 3.58 4.62 5.55 7.20 6.50 5.63 3.84 2.99 2.80 4.33 1974 3.18 3.41 4.92 4.55 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 5.82 ****** 9.92 12.34 ****** 16.62 23.96 22.75 16.22 9.86 ****** 5.50 ****** 1982 4.70 4.51 5.65 11.23 14.05 16.50 12.92 14.88 11.78 ****** 6.76 4.56 ****** 1983 3.75 4.62 ****** 8.00 11.07 13.73 16.29 17.79 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.59 3.17 4.80 4.12 4.65 4.95 5.79 5.61 5.84 4.88 3.89 3.33 4.55 1992 2.67 2.65 3.29 3.97 5.56 5.32 5.70 6.09 4.11 3.89 3.97 ****** ****** 1993 2.69 ****** 2.84 3.96 4.74 4.56 6.18 6.07 4.74 3.78 5.06 4.21 ****** 1994 3.96 3.03 3.56 4.32 4.50 4.94 6.17 5.48 4.71 5.93 5.11 2.95 4.55 1995 3.23 3.31 3.14 4.84 5.28 5.60 6.20 5.26 4.74 4.29 2.88 3.15 4.33 1996 3.23 4.04 4.11 4.68 6.13 5.47 6.08 5.54 4.64 4.53 3.40 3.33 4.60 1997 2.87 2.06 3.15 3.75 4.32 5.81 7.22 5.21 4.33 4.45 5.09 4.40 4.39 1998 3.36 3.37 3.84 4.80 5.84 7.08 10.21 8.21 6.80 5.49 4.90 4.85 5.73 1999 3.85 3.40 3.74 5.48 6.09 6.73 8.75 7.63 6.80 5.76 4.89 4.28 5.62 2000 3.46 3.28 3.57 5.51 5.69 6.89 8.43 8.41 8.05 6.36 5.29 4.88 5.82 MEAN 3.40 3.32 4.00 5.17 5.80 6.74 8.12 7.67 5.91 4.94 4.27 3.73 5.26 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 28 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF VAPOUR PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 5.30 4.80 3.92 6.50 6.33 7.17 8.93 8.69 7.78 4.97 4.22 4.50 6.09 1962 4.51 4.42 4.32 6.96 7.53 8.02 8.72 8.62 6.36 6.02 4.90 5.38 6.32 1963 5.04 4.31 4.03 6.49 8.03 6.78 9.05 9.42 6.06 6.66 5.36 4.72 6.33 1964 2.38 4.45 5.13 4.64 4.95 7.13 9.19 7.43 6.53 4.67 4.40 4.12 5.42 1965 4.77 4.15 5.54 4.83 5.84 7.11 8.36 7.32 7.00 7.94 5.63 4.13 6.05 1966 4.91 4.49 5.21 6.52 7.33 6.60 8.36 7.75 7.22 8.78 4.51 4.56 6.35 1967 4.17 4.33 3.85 5.61 7.07 5.94 9.48 7.47 7.28 6.48 6.62 4.44 6.06 1968 4.14 4.39 5.12 6.72 8.38 8.18 8.39 9.30 5.68 6.40 8.28 5.78 6.73 1969 4.38 4.90 7.72 7.23 8.10 ****** 11.35 9.64 7.26 8.27 5.35 5.24 ****** 1970 4.93 4.07 5.21 6.16 6.31 7.21 10.41 9.94 7.57 4.77 5.43 4.71 6.39 1971 4.32 4.29 5.49 6.91 7.98 7.96 9.02 8.25 7.15 5.59 6.57 4.67 6.52 1972 4.13 4.39 5.61 6.48 8.52 9.16 9.66 8.60 6.30 6.04 5.20 4.59 6.56 1973 3.71 5.02 4.02 4.94 6.39 7.69 9.96 8.99 7.79 5.31 4.12 3.84 5.98 1974 4.36 4.67 6.75 6.26 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 7.97 ****** 13.55 16.79 ****** 22.59 32.26 30.70 21.99 13.50 ****** 7.55 ****** 1982 6.44 6.18 7.75 15.34 19.16 22.45 17.69 20.29 16.13 ****** 9.25 6.23 ****** 1983 5.13 6.33 ****** 10.96 15.16 18.77 22.19 24.17 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 4.93 4.35 6.59 5.69 6.42 6.85 8.02 7.77 8.08 6.73 5.35 4.57 6.28 1992 3.66 3.64 4.52 5.47 7.66 7.36 7.90 8.42 5.70 5.38 5.47 ****** ****** 1993 3.69 ****** 3.91 5.47 6.55 6.30 8.56 8.41 6.57 5.22 6.94 5.78 ****** 1994 5.44 4.16 4.91 5.96 6.22 6.84 8.55 7.60 6.51 8.16 7.02 4.05 6.28 1995 4.44 4.55 4.32 6.66 7.28 7.74 8.60 7.31 6.56 5.92 3.98 4.33 5.97 1996 4.43 5.55 5.64 6.44 8.46 7.57 8.42 7.67 6.43 6.25 4.68 4.58 6.35 1997 3.94 2.84 4.34 5.17 5.98 8.05 9.99 7.23 6.00 6.15 6.99 6.03 6.06 1998 4.61 4.62 5.28 6.62 8.06 9.79 14.06 11.34 9.40 7.57 6.74 6.66 7.90 1999 5.29 4.68 5.14 7.54 8.42 9.30 12.05 10.55 9.39 7.94 6.72 5.87 7.74 2000 4.75 4.51 4.92 7.60 7.87 9.54 11.64 11.61 11.11 8.75 7.26 6.68 8.02 MEAN 4.66 4.56 5.49 7.11 8.00 9.28 11.19 10.56 8.15 6.81 5.87 5.13 7.23 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 29 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF SATURATION DEFICIT PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 2.06 3.61 7.56 10.36 24.44 31.68 37.29 29.08 23.78 15.20 8.87 5.72 16.64 1962 3.59 5.56 11.01 9.02 19.23 27.12 34.12 28.18 22.50 14.96 6.93 4.11 15.53 1963 5.53 7.31 8.44 12.55 13.96 31.30 36.46 30.98 28.15 16.29 7.57 2.90 16.79 1964 2.24 4.18 9.11 11.79 24.28 32.42 38.31 36.78 25.85 14.35 8.14 2.54 17.50 1965 1.45 4.57 6.94 12.13 23.23 29.84 34.31 33.56 22.85 12.31 8.78 5.77 16.31 1966 6.02 6.85 7.33 11.39 18.85 33.87 34.08 34.76 24.24 9.81 9.28 5.48 16.83 1967 4.14 3.27 7.65 9.67 18.83 28.39 33.87 34.87 24.74 13.54 7.35 4.51 15.90 1968 3.52 4.04 7.08 10.44 16.29 25.64 33.00 31.57 27.37 15.78 4.42 3.41 15.21 1969 1.58 2.03 5.08 9.86 18.06 ****** 28.97 27.57 21.44 13.36 5.56 4.69 ****** 1970 2.43 6.63 7.23 15.00 23.27 32.79 31.58 33.75 23.99 16.84 10.38 3.89 17.31 1971 3.72 4.25 8.52 9.42 21.46 30.01 35.92 34.38 23.84 14.87 6.47 4.78 16.47 1972 1.20 1.72 4.37 13.40 11.90 25.96 32.99 26.10 26.71 18.81 8.11 2.05 14.44 1973 2.04 5.28 8.42 12.85 20.38 32.39 34.91 33.23 23.41 18.50 8.73 4.25 17.03 1974 1.40 1.74 6.48 10.17 ****** ****** ****** ****** ****** ****** ****** ****** ****** 1975 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1976 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1977 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1978 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1979 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1980 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1981 1.23 ****** 2.25 2.56 ****** 10.07 10.22 10.35 9.75 6.78 ****** 3.54 ****** 1982 1.77 1.36 2.69 7.05 8.67 14.82 24.04 17.64 14.91 ****** 1.40 0.87 ****** 1983 0.94 2.07 ****** 5.33 11.32 20.51 24.07 19.46 ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1988 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1989 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 2.75 3.43 4.81 14.57 17.95 29.12 35.55 34.15 24.76 14.16 8.66 4.00 16.16 1992 2.72 4.20 4.53 11.11 12.53 26.96 38.14 28.21 23.29 15.41 9.02 ****** ****** 1993 3.02 ****** 7.08 12.98 18.04 30.82 33.39 31.98 28.62 13.90 3.97 4.04 ****** 1994 3.60 4.76 8.87 14.51 19.67 29.82 37.21 37.58 21.29 10.91 6.93 3.78 16.58 1995 5.25 5.66 9.14 11.92 17.68 27.07 40.87 40.83 25.87 14.56 11.56 3.60 17.83 1996 2.65 3.99 4.05 10.44 19.00 30.20 32.92 34.88 30.53 14.57 8.66 6.18 16.50 1997 5.76 6.36 6.34 13.23 20.72 30.07 38.28 40.01 26.70 18.16 5.58 3.14 17.86 1998 2.44 3.90 7.10 14.24 18.22 30.78 30.42 31.09 24.52 15.59 10.64 6.13 16.26 1999 3.35 6.93 7.51 11.73 21.48 31.75 28.28 33.48 24.27 16.21 5.45 4.20 16.22 2000 3.69 4.86 7.57 15.84 24.60 30.47 31.68 31.50 24.36 10.89 4.41 2.43 16.02 MEAN 2.97 4.34 6.81 11.24 18.56 28.16 32.73 31.00 23.91 14.41 7.37 4.00 15.46 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 30 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 74 61 39 43 22 20 20 24 26 26 35 47 36 1962 57 47 31 48 30 25 22 25 23 31 42 59 37 1963 50 41 36 37 41 19 21 25 19 31 43 65 36 1964 49 55 39 33 18 19 21 18 21 28 38 65 34 1965 77 51 48 32 22 20 21 19 25 43 41 44 37 1966 47 42 45 40 31 17 21 19 25 50 34 48 35 1967 53 58 37 41 29 19 23 18 25 35 51 50 37 1968 58 56 45 44 37 27 21 24 18 33 67 65 41 1969 75 72 64 47 34 *** 30 27 28 44 51 56 *** 1970 68 42 47 33 25 20 27 23 26 24 37 58 36 1971 56 53 43 46 29 22 21 21 25 29 54 53 38 1972 79 75 62 37 45 28 24 26 20 27 42 69 45 1973 66 54 35 32 27 20 23 22 27 24 36 53 35 1974 77 75 59 44 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 87 *** 86 87 *** 71 76 75 70 69 *** 71 *** 1982 80 83 76 69 71 61 44 55 54 *** 87 87 *** 1983 82 76 *** 71 59 49 49 56 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 65 59 60 31 30 21 20 20 27 34 41 56 39 1992 58 48 52 37 45 24 18 25 21 28 39 *** *** 1993 59 *** 40 33 30 19 22 22 20 30 65 62 *** 1994 62 49 39 32 27 20 20 18 24 45 52 52 37 1995 48 47 34 38 32 24 18 16 23 32 27 57 33 1996 65 63 64 42 34 22 21 20 19 33 37 44 39 1997 43 32 44 31 24 22 22 16 20 27 58 68 34 1998 66 58 47 34 34 26 33 29 30 36 41 55 41 1999 63 43 45 41 30 24 33 25 31 36 58 61 41 2000 59 51 41 34 25 26 28 28 33 49 65 75 43 MEAN 64 56 48 42 33 27 27 27 27 35 48 59 41 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 31 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF MAXIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 87 78 55 60 32 27 26 32 31 33 46 58 47 1962 68 64 43 62 40 35 29 33 28 40 54 69 47 1963 61 54 53 52 58 28 26 32 24 39 53 74 46 1964 61 65 54 49 26 25 26 23 26 34 47 76 43 1965 88 67 61 45 29 28 27 23 32 56 51 54 47 1966 59 54 60 54 42 23 27 22 30 63 41 58 44 1967 64 70 51 56 40 26 29 22 30 45 62 59 46 1968 76 68 60 56 50 37 26 30 24 42 77 80 52 1969 85 83 75 62 46 *** 37 33 36 55 65 68 *** 1970 79 56 58 43 35 25 36 28 32 30 47 69 45 1971 68 66 58 62 38 27 26 26 32 37 66 66 48 1972 89 87 76 52 61 38 30 33 25 37 52 81 55 1973 81 65 51 44 38 28 30 27 34 29 52 68 46 1974 87 85 68 58 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 92 *** 90 93 *** 84 84 81 80 79 *** 82 *** 1982 89 90 85 79 82 71 55 68 64 *** 92 92 *** 1983 89 84 *** 82 71 59 62 68 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 75 71 73 42 43 29 27 26 33 45 50 68 49 1992 68 59 64 52 57 33 26 33 28 37 48 *** *** 1993 67 *** 55 46 42 30 29 30 28 40 78 73 *** 1994 75 62 55 44 41 29 26 23 32 56 63 64 48 1995 60 61 46 51 43 33 24 22 33 41 35 66 43 1996 75 73 75 55 45 30 27 27 25 44 51 56 49 1997 53 43 59 39 32 31 28 20 28 36 68 78 43 1998 75 70 59 45 47 34 41 39 38 45 49 63 50 1999 78 56 56 53 39 31 44 33 38 44 68 71 51 2000 69 64 51 42 33 33 35 35 41 58 76 83 52 MEAN 75 68 61 55 44 35 34 33 34 44 58 70 51 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 32 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. AVERAGE OF MINIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 59 48 27 30 16 15 16 19 21 20 26 36 28 1962 46 33 21 36 22 18 16 19 17 24 32 48 28 1963 40 30 23 25 29 13 16 19 15 24 33 55 27 1964 36 44 28 21 13 14 17 14 17 22 29 53 26 1965 66 37 38 22 16 14 16 15 20 32 33 33 29 1966 37 32 33 28 23 13 16 16 20 41 26 39 27 1967 43 46 26 30 22 13 18 15 20 25 41 39 28 1968 43 44 34 34 26 19 17 19 14 25 57 52 32 1969 64 60 54 36 24 *** 25 23 22 32 39 42 *** 1970 57 29 38 25 16 15 21 19 21 18 28 46 28 1971 44 41 31 33 21 18 18 16 19 22 42 39 29 1972 67 60 51 26 33 21 19 21 16 19 32 56 35 1973 49 42 23 21 18 14 19 18 21 18 22 36 25 1974 67 64 51 32 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 82 *** 80 81 *** 59 67 68 59 56 *** 58 *** 1982 70 76 67 59 60 51 34 40 42 *** 82 79 *** 1983 76 67 *** 62 48 38 38 44 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 56 49 50 24 20 14 15 16 21 27 33 45 31 1992 49 38 41 25 35 17 13 20 16 20 31 *** *** 1993 51 *** 29 24 21 11 16 17 15 22 55 51 *** 1994 50 39 27 24 18 14 16 14 19 35 41 41 28 1995 37 37 25 29 23 16 13 12 16 25 19 49 25 1996 53 54 54 31 26 15 17 14 14 24 27 35 30 1997 34 23 33 23 18 16 17 12 15 20 48 57 26 1998 57 48 37 26 25 20 27 22 24 29 34 47 33 1999 53 33 35 32 24 19 25 20 26 31 49 51 33 2000 50 41 34 27 19 21 23 23 28 42 55 67 36 MEAN 53 45 38 32 25 20 21 21 22 27 38 48 33 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 33 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. NO. OF DAYS PRECIPITATION EQUAL OR MORE THAN 5 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1961 4 3 2 2 0 0 0 0 0 0 0 1 12 1962 1 4 1 7 0 0 0 0 0 0 0 0 13 1963 0 0 0 1 7 0 0 2 0 1 2 7 20 1964 0 1 0 2 0 0 0 0 0 0 2 2 7 1965 8 1 2 1 0 0 0 0 0 2 2 1 17 1966 3 1 3 1 1 0 0 0 1 4 0 2 16 1967 0 2 1 4 2 0 0 0 0 1 3 1 14 1968 2 2 4 2 2 1 0 0 0 1 5 2 21 1969 8 4 6 2 0 *** 0 1 0 2 1 2 *** 1970 2 0 3 1 1 0 0 0 0 0 2 3 12 1971 2 3 0 4 0 0 0 0 0 0 3 1 13 1972 4 4 9 2 3 1 0 0 0 0 3 6 32 1973 2 4 0 2 0 0 0 0 0 0 1 3 12 1974 7 7 4 4 *** *** *** *** *** *** *** *** *** 1975 *** *** *** *** *** *** *** *** *** *** *** *** *** 1976 *** *** *** *** *** *** *** *** *** *** *** *** *** 1977 *** *** *** *** *** *** *** *** *** *** *** *** *** 1978 *** *** *** *** *** *** *** *** *** *** *** *** *** 1979 *** *** *** *** *** *** *** *** *** *** *** *** *** 1980 *** *** *** *** *** *** *** *** *** *** *** *** *** 1981 0 *** 0 0 0 0 0 0 0 0 *** 0 *** 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 0 0 *** 0 0 0 0 0 *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** *** *** *** *** *** *** 1988 *** *** *** *** *** *** *** *** *** *** *** *** *** 1989 *** *** *** *** *** *** *** *** *** *** *** *** *** 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 1 2 6 2 0 0 0 0 0 0 0 5 16 1992 5 2 5 2 3 1 0 0 0 0 1 *** *** 1993 2 *** 4 3 0 0 0 0 0 0 6 1 *** 1994 5 3 2 1 3 0 0 0 0 2 7 0 23 1995 0 1 2 1 0 0 0 0 0 0 0 3 7 1996 9 5 10 4 3 1 0 0 0 2 0 2 36 1997 1 0 6 2 0 1 0 0 0 0 3 4 17 1998 6 5 5 3 2 0 0 1 0 0 0 2 24 1999 3 2 5 0 0 0 2 0 0 2 5 3 22 2000 3 2 2 0 0 0 0 0 0 3 2 5 17 MEAN 3 2 3 2 1 0 0 0 0 1 2 2 16 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 34 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. HIGHEST AND LOWEST LIMITS FOR 40 YEARS DURING 1961-2000 ELE- JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MENT --------------------------------------------------------------------------------------------- NO. HIG. DRY 03 12.0 12.8 17.8 24.0 26.2 30.6 34.6 32.6 27.6 25.2 16.6 11.6 1 YEAR - DAY 1963-28 1963-25 1981-25 1982-27 2000-26 1973-29 1995-16 1997-15 1997- 2 1968-10 1970- 4 1998-12 LOW. DRY 03 -13.2 -11.0 -5.2 -5.4 5.2 10.6 17.2 16.2 10.4 5.6 -4.6 -12.0 2 YEAR - DAY 1964-20 1972- 3 1992-12 1967- 2 1992- 2 1967- 6 1999-15 1969-27 1973-27 1970-25 1964-28 1963-28 HIG. WET 03 8.2 7.8 15.8 20.8 23.4 27.4 29.8 25.8 24.0 17.8 11.4 8.8 3 YEAR - DAY 1994- 4 1998- 8 1981-25 1981-23 1981-26 1981-30 1981-14 1981-10 1981-14 1968-10 1993- 2 1998- 1 LOW. WET 03 -14.4 -11.6 -7.0 -7.0 3.8 4.6 10.4 7.6 3.8 1.4 -6.6 -14.0 4 YEAR - DAY 1964-20 1967- 3 1992-12 1967- 2 1992- 5 1967- 6 1968-13 1972-27 1962-27 1964-29 1964-28 1963-28 HIG. DRY 09 15.6 17.8 24.2 28.4 32.8 37.6 38.6 37.8 38.6 30.6 22.8 17.8 5 YEAR - DAY 1963-29 1963-23 1974-20 1981-25 1970-28 1973-28 1995-16 1997-15 1970- 9 1970- 1 1973- 2 1969- 5 LOW. DRY 09 -7.0 -4.2 -2.4 1.4 4.8 9.2 24.0 18.8 13.8 8.0 2.8 -5.0 6 YEAR - DAY 1969- 7 1972- 2 1992-11 1967- 1 1992- 2 1967- 6 1999-14 1992-29 1969-13 1999-26 1993-29 1963-26 HIG. WET 09 12.8 9.2 18.8 25.4 29.8 30.4 32.4 34.2 30.2 18.2 14.0 11.4 7 YEAR - DAY 1981- 3 1973-16 1981-24 1981-26 1981-26 1993-11 1981-14 1983-13 1981-12 1981- 7 1973-17 1998- 1 LOW. WET 09 -8.2 -6.0 -4.2 -0.4 4.5 8.6 12.4 12.6 9.0 3.8 -1.6 -6.0 8 YEAR - DAY 1964-20 1972- 2 1992-11 1967- 1 1992- 2 1967- 6 1996-15 1972-27 1962-26 1965-26 1964-29 1963-26 HIG. DRY 15 13.6 16.0 21.0 26.8 32.8 36.2 38.4 37.8 33.4 28.4 20.2 14.4 9 YEAR - DAY 1966-29 1973-19 1962-25 1998-16 1981-26 1970-24 1995-13 1997-17 2000- 8 1998- 1 1973- 2 1965-15 LOW. DRY 15 -10.4 -7.6 -2.0 1.0 7.2 17.0 22.0 20.4 14.0 7.2 -0.4 -8.0 10 YEAR - DAY 1972-24 1972- 2 1992-11 1967- 1 1992- 2 1972- 7 1969-11 1992-29 1969-12 1965-29 1964-29 1963-26 HIG. WET 15 9.2 8.6 18.2 24.8 31.6 29.6 32.6 29.6 29.4 19.6 14.0 10.0 11 YEAR - DAY 1981- 5 1996-10 1981-24 1981-22 1981-26 1981-22 1981- 5 1983-16 1981-16 1972-24 1973- 3 1998- 1 LOW. WET 15 -13.0 -8.4 -3.4 -1.0 5.4 7.6 13.4 10.8 9.0 3.6 -3.6 -9.6 12 YEAR - DAY 1964-20 1972- 2 1992-11 1997-12 1995-14 1967- 6 1996-15 1997-29 1962-26 1961-31 1964-29 1963-26 HIG. MIN. 9.0 12.5 16.0 20.0 24.2 28.5 31.5 29.7 26.8 21.4 15.2 11.5 13 YEAR - DAY 1963-28 1963-25 1968-14 1981-25 1970-28 1973-29 1995-16 1968-17 1997- 2 1997- 3 1970- 7 1998-13 LOW. MIN. -15.5 -12.0 -6.0 -6.4 4.5 8.2 16.5 13.2 9.8 4.7 -7.0 -13.0 14 YEAR - DAY 1972-24 1972- 2 1992-11 1967- 2 1992- 5 1967- 6 1968-13 1968-21 1981-24 1964-29 1964-29 1963-28 HIG. MAX. 16.5 20.0 26.0 29.0 36.0 39.0 41.0 39.7 39.0 32.2 23.7 18.5 15 YEAR - DAY 1963-29 1973-19 1970-31 1982-27 1965-18 1972-24 1995-16 1969- 6 1970- 9 1970- 1 1967- 1 1969- 5 LOW. MAX. -6.0 -3.4 -0.4 2.5 10.0 21.5 27.0 25.0 16.0 10.6 4.4 -2.7 16 YEAR - DAY 1969- 7 1991-12 1992-11 1967- 1 1992- 3 1967- 6 1999-13 1969-29 1969-12 1999-26 1993-30 1963-30 HIG. PPTN 39.0 37.0 60.0 50.4 22.5 14.0 5.0 16.0 8.0 23.0 37.0 41.0 17 YEAR - DAY 1969-23 1994- 1 1996- 2 1962-21 1968-30 1996-28 1999-14 1998- 4 1966-30 1994- 4 1994-26 1998- 4 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 35 STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. HIGHEST LIMITS OF ABSOLUTE DIFFERENCES FOR 40 YEARS DURING 1961-2000 ELE- JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MENT --------------------------------------------------------------------------------------------- NO. DRY 09 - DRY 03 13.4 12.4 14.0 12.2 12.8 11.2 11.6 11.0 17.2 12.8 13.2 11.4 18 YEAR - DAY 1968-14 1963-22 1971-25 1962- 6 1994-27 1970- 3 1972- 2 1970-28 1970- 9 1970- 5 1973-15 1973-25 DRY 15 - DRY 09 12.0 8.0 7.8 11.4 12.2 11.4 6.0 7.4 10.4 11.2 9.0 9.8 19 YEAR - DAY 1964-19 1967-24 1992-30 1967-22 1972-29 1967- 6 1969-11 1968- 2 1970- 9 1962-10 1996-18 1970- 9 DRY 15 - DRY 03 11.4 9.8 12.4 12.2 13.0 10.8 10.2 10.2 14.2 10.2 9.2 12.4 20 YEAR - DAY 1970-28 1973-28 1972-12 1967-16 1995-18 1994- 5 1971-25 1964- 5 1992- 2 1965-11 1991-19 1971-21 WET 09 - WET 03 10.8 11.2 10.0 10.4 9.4 17.6 13.8 11.4 10.0 10.4 10.0 10.0 21 YEAR - DAY 1983- 3 1972-11 1981-11 1974-20 1981- 6 1993-11 1981-16 1983-16 1981-12 1961-13 1973-17 1982-22 WET 15 - WET 09 11.4 6.6 7.4 8.6 8.0 16.4 6.4 10.8 11.2 6.6 6.2 7.4 22 YEAR - DAY 1964-19 1982-18 1967- 8 1981-30 1983- 9 1993-11 1983-27 1983-13 1981-16 1972-24 1973-17 1982-31 WET 15 - WET 03 8.6 9.8 9.8 10.8 8.2 8.4 13.8 14.6 11.4 12.8 10.0 12.2 23 YEAR - DAY 1969- 8 1982-17 1969-17 1974-20 1981-26 1983-21 1981-16 1968- 4 1971-21 1972-25 1973- 3 1971-21 DAY BY DAY DRY 03 11.6 10.8 14.4 10.0 10.4 9.4 6.6 6.6 7.8 12.6 10.6 8.6 24 YEAR - DAY 1964-20 1965-10 1971-16 1970-20 1999-21 1967- 6 1982-13 1981-19 1966-30 1967-23 1973- 7 1967-24 DAY BY DAY WET 03 11.0 9.2 9.6 8.4 7.2 6.0 9.4 5.4 6.6 11.0 9.8 8.6 25 YEAR - DAY 1964-20 1967- 3 1967- 9 1969-14 1999-21 1967- 6 1981-17 1996-14 1971-20 1968-11 1961-24 1967-24 DAY BY DAY DRY 09 10.4 10.2 11.4 13.6 11.0 14.4 6.8 11.0 13.2 11.0 10.2 14.6 26 YEAR - DAY 1971-15 1996-27 1974-31 1964- 6 1991- 4 1967- 6 1982-23 1968- 2 1973-10 1964- 7 1992-26 1963-25 DAY BY DAY WET 09 9.2 7.2 8.6 10.0 9.4 17.2 10.4 9.0 11.2 6.4 8.2 9.0 27 YEAR - DAY 1964-20 1999-21 1967- 9 1974-21 1983-10 1993-11 1982-30 1982-21 1981-16 2000- 4 1994- 9 1963-25 DAY BY DAY DRY 15 13.4 12.2 9.6 11.8 13.8 10.0 6.6 9.6 9.2 10.2 12.0 12.8 28 YEAR - DAY 1964-19 1982-18 1965-13 2000-21 1998-13 1972- 7 1966- 7 1963-22 1966-30 1996-16 1992-26 1963-25 DAY BY DAY WET 15 10.8 12.6 8.6 10.6 10.0 9.0 12.3 11.0 11.2 10.4 11.0 10.0 29 YEAR - DAY 1964-19 1982-18 1962-26 1981-22 1981-27 1982- 2 1983-31 1968- 4 1981-17 1972-26 1993-14 1971-22 DAY BY DAY MIN. 12.3 13.5 13.4 10.0 10.9 9.8 12.3 9.3 9.6 9.2 12.5 7.8 30 YEAR - DAY 1964-20 1967-25 1971-16 1970-20 1973-17 1967- 6 1967- 7 1968-22 1982- 5 1965-23 1992-26 1994-21 DAY BY DAY MAX. 9.7 9.0 8.8 10.0 9.2 8.0 5.0 5.2 12.0 9.5 9.2 12.5 31 YEAR - DAY 1972-20 1967-25 1971-18 1970-20 1998- 2 1972-25 1966- 7 1969- 7 1969-12 1962-11 1992-27 1963-25 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 2.8 4.0 7.8 13.4 22.6 26.2 29.9 26.8 24.1 17.0 10.3 7.0 16.0 AVERAGE OF MINIMUM TEMPERATURE IN C. -1.2 -0.5 2.5 8.2 16.8 20.1 24.6 21.4 18.6 11.6 5.0 2.2 10.8 AVERAGE OF MAXIMUM TEMPERATURE IN C. 6.9 8.6 13.1 18.5 28.4 32.2 35.3 32.3 29.7 22.4 15.6 11.8 21.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.1 9.1 10.6 10.3 11.6 12.1 10.7 10.9 11.1 10.8 10.6 9.6 10.5 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.68 3.29 2.99 5.16 5.28 5.70 6.64 6.32 5.30 3.27 3.00 3.08 4.47 MEAN OF MIXING RATIO AT 09 GMT. 3.85 3.53 2.74 4.49 4.21 4.94 6.35 6.35 5.99 3.85 3.10 3.31 4.39 MEAN OF MIXING RATIO AT 15 GMT. 4.07 3.68 2.80 4.50 4.21 4.89 6.35 6.18 5.59 3.68 3.08 3.43 4.37 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -6.5 -9.5 -3.2 1.0 9.2 10.7 21.0 18.0 14.7 5.2 -2.7 -1.2 -9.5 DAY 31 1 4 17 1 7 3 9 20 27 24 27 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 16.0 14.7 20.5 28.2 32.7 36.5 38.5 35.2 34.0 28.0 21.2 16.0 38.5 DAY 19 8 25 28 24 20 11 20 1 1 5 9 24 HOUR MAXIMUM PRECIPITATION IN MM. 16.0 14.0 15.6 6.7 0.0 0.0 1.2 1.2 0.0 0.0 0.0 9.0 16.0 DAY 3 28 13 26 ** ** 18 1 ** ** ** 14 MONTHLY TOTAL PRECIPITATION IN MM. 57.4 36.2 21.1 17.4 0.0 0.0 1.2 2.4 0.0 0.0 0.0 12.5 148.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 77.4 11.7 2.4 8.4 NO. OF DAYS WITH PRECIPITATION. 9 6 3 6 0 0 1 2 0 0 0 2 29 NO. OF DAYS PRECIPITATION EQUAL 9 4 2 4 0 0 1 2 0 0 0 2 24 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 2 1 0 0 0 0 0 0 0 0 0 5 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 81 71 51 57 32 27 26 31 31 31 43 54 45 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 63 51 30 34 17 17 18 21 22 22 27 38 30 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 78 61 35 38 18 16 18 21 24 27 34 49 35 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 3 4 0 0 0 0 0 0 0 0 0 0 7 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 1 16 31 17 4 0 0 0 69 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 9 25 31 30 11 0 0 0 106 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 23 14 11 0 0 0 0 0 0 0 7 5 60 DATE OF START AND END FREEZING START = 24 NOV. END = 18 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 4.2 6.8 12.2 13.3 20.6 25.0 28.7 26.6 22.3 17.4 8.9 6.1 16.0 AVERAGE OF MINIMUM TEMPERATURE IN C. 0.1 2.2 6.5 8.1 15.1 19.3 23.1 21.0 16.5 11.9 3.8 1.8 10.8 AVERAGE OF MAXIMUM TEMPERATURE IN C. 8.3 11.5 17.9 18.6 26.1 30.7 34.3 32.1 28.1 22.9 13.9 10.4 21.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.2 9.3 11.4 10.5 11.0 11.4 11.2 11.1 11.6 11.0 10.1 8.6 10.4 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.16 3.30 3.21 5.24 5.88 6.62 6.99 6.53 3.95 3.99 3.58 3.81 4.69 MEAN OF MIXING RATIO AT 09 GMT. 3.29 3.09 2.92 4.98 5.49 5.57 6.10 6.23 4.83 4.38 3.51 4.07 4.54 MEAN OF MIXING RATIO AT 15 GMT. 3.44 3.27 3.27 4.96 4.99 5.21 5.81 5.95 5.01 4.72 3.59 3.89 4.51 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -3.0 -2.2 -2.0 3.8 7.2 10.5 20.7 17.2 10.2 5.5 -3.5 -2.5 -3.5 DAY 14 11 13 6 12 11 25 11 27 12 30 1 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 11.5 17.0 23.7 24.0 30.5 34.0 37.0 38.0 33.0 29.0 21.2 17.0 38.0 DAY 30 20 24 9 18 29 5 1 3 8 1 21 24 HOUR MAXIMUM PRECIPITATION IN MM. 5.0 18.3 9.5 50.4 1.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 50.4 DAY 3 8 1 21 15 ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. 18.4 64.4 9.5 161.5 4.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 257.8 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 35.8 64.2 0.0 0.0 NO. OF DAYS WITH PRECIPITATION. 8 5 1 12 3 0 0 0 0 0 0 0 29 NO. OF DAYS PRECIPITATION EQUAL 7 5 1 12 3 0 0 0 0 0 0 0 28 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 4 0 5 0 0 0 0 0 0 0 0 9 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 64 59 42 60 40 35 29 32 25 36 53 67 45 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 49 37 22 39 25 20 18 21 20 25 32 52 30 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 58 45 28 44 25 19 17 21 23 32 42 57 34 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 12 30 15 2 0 0 0 59 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 2 19 31 27 11 0 0 0 90 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 16 7 1 0 0 0 0 0 0 0 8 11 43 DATE OF START AND END FREEZING START = 17 NOV. END = 13 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 7.5 8.3 9.3 15.9 17.7 26.0 29.8 28.3 25.2 19.1 10.3 2.8 16.7 AVERAGE OF MINIMUM TEMPERATURE IN C. 2.9 3.6 3.9 10.5 12.3 20.0 24.2 22.7 19.4 14.0 5.5 -1.4 11.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 12.0 13.0 14.6 21.2 23.1 32.1 35.4 33.8 30.9 24.1 15.2 6.9 21.9 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.1 9.4 10.7 10.7 10.8 12.1 11.2 11.1 11.5 10.1 9.7 8.3 10.4 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.51 3.08 3.14 5.04 6.69 5.73 6.39 6.77 3.79 4.68 3.80 3.05 4.64 MEAN OF MIXING RATIO AT 09 GMT. 3.66 3.03 2.74 4.66 5.51 4.82 7.09 6.96 4.38 4.97 3.86 3.65 4.61 MEAN OF MIXING RATIO AT 15 GMT. 3.82 3.29 2.89 4.42 5.28 4.12 6.12 6.70 4.96 4.81 4.02 3.62 4.50 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -2.0 -2.0 -4.7 5.5 7.0 16.5 18.5 18.2 11.0 9.0 -0.5 -13.0 -13.0 DAY 9 5 8 1 4 13 1 23 14 31 28 28 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 16.5 19.0 22.5 26.0 28.0 35.0 39.0 37.2 35.2 28.5 21.3 17.0 39.0 DAY 29 20 25 9 24 27 18 13 4 2 2 23 24 HOUR MAXIMUM PRECIPITATION IN MM. 2.8 3.5 4.5 5.5 9.5 1.0 0.0 10.0 1.5 5.5 15.0 20.0 20.0 DAY 28 12 20 30 2 29 ** 3 10 20 3 25 MONTHLY TOTAL PRECIPITATION IN MM. 5.8 6.0 13.0 8.1 60.9 1.0 0.0 21.0 1.5 7.5 24.0 74.2 223.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 11.1 31.4 10.1 47.4 NO. OF DAYS WITH PRECIPITATION. 3 3 5 3 13 1 0 3 1 3 2 8 45 NO. OF DAYS PRECIPITATION EQUAL 2 3 5 3 13 1 0 3 1 2 2 8 43 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 0 0 0 0 0 1 0 0 1 4 6 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 58 49 48 49 57 28 25 31 22 38 53 66 44 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 41 33 27 30 32 16 20 21 16 26 34 59 30 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 52 40 31 31 35 14 17 22 20 29 44 70 34 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 1 0 0 0 0 0 0 0 0 6 7 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 11 27 26 9 0 0 0 73 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 3 3 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 25 31 31 21 0 0 0 108 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 6 8 4 0 0 0 0 0 0 0 3 15 36 DATE OF START AND END FREEZING START = 28 NOV. END = 10 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. -3.7 4.6 11.7 13.3 21.6 27.1 30.3 29.4 24.6 16.0 9.4 0.9 15.4 AVERAGE OF MINIMUM TEMPERATURE IN C. -8.6 0.1 6.9 8.1 15.5 21.8 24.6 23.9 19.1 10.6 4.0 -3.7 10.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 1.2 9.2 16.5 18.5 27.6 32.5 36.0 34.9 30.1 21.5 14.7 5.4 20.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.8 9.1 9.6 10.4 12.1 10.7 11.4 11.0 11.0 10.9 10.7 9.1 10.5 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 1.19 2.98 3.88 3.65 3.94 5.51 6.61 5.25 4.24 3.03 3.00 2.78 3.84 MEAN OF MIXING RATIO AT 09 GMT. 2.37 3.37 3.69 3.44 3.54 5.40 6.85 5.64 5.09 3.67 3.28 3.22 4.13 MEAN OF MIXING RATIO AT 15 GMT. 1.65 3.38 3.59 3.00 3.24 4.51 6.43 5.17 4.81 3.44 3.29 3.02 3.79 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -14.0 -5.5 1.0 0.7 6.5 19.5 20.5 20.0 15.5 4.7 -7.0 -7.2 -14.0 DAY 20 1 8 15 2 16 1 21 22 29 29 15 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 6.0 14.2 24.0 26.0 31.5 34.7 39.5 38.5 34.0 29.2 19.5 10.5 39.5 DAY 16 22 26 6 31 26 11 14 5 2 20 8 24 HOUR MAXIMUM PRECIPITATION IN MM. 0.0 13.0 3.5 10.0 0.0 0.0 0.0 0.0 0.0 0.0 10.5 12.0 13.0 DAY ** 2 12 12 ** ** ** ** ** ** 25 13 MONTHLY TOTAL PRECIPITATION IN MM. 0.0 22.1 8.5 22.5 0.0 0.0 0.0 0.0 0.0 0.0 16.0 22.0 91.1 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 33.6 24.7 0.0 41.7 NO. OF DAYS WITH PRECIPITATION. 0 4 4 3 0 0 0 0 0 0 2 3 16 NO. OF DAYS PRECIPITATION EQUAL 0 4 3 3 0 0 0 0 0 0 2 3 15 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 0 1 0 0 0 0 0 0 1 1 4 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 41 61 50 43 25 25 26 23 25 32 44 71 39 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 57 48 32 28 15 17 19 16 18 23 31 58 30 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 49 56 34 28 15 15 17 15 20 27 40 66 32 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 28 1 0 0 0 0 0 0 0 0 3 16 48 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 4 21 30 28 11 0 0 0 94 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 11 0 0 0 0 0 0 0 0 0 0 0 11 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 7 30 31 29 14 0 0 0 111 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 30 16 0 0 0 0 0 0 0 0 4 29 79 DATE OF START AND END FREEZING START = 27 NOV. END = 28 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 0.5 4.5 9.5 13.7 22.3 26.0 28.8 28.3 23.4 17.2 12.0 6.3 16.0 AVERAGE OF MINIMUM TEMPERATURE IN C. -2.5 0.0 5.0 8.8 16.7 20.2 23.3 22.9 18.1 12.7 7.4 1.6 11.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.6 8.9 13.9 18.6 27.9 31.7 34.3 33.7 28.7 21.6 16.7 10.9 20.9 DIFFERENCE BETWEEN AVERAGE MAXIMUM 6.1 8.9 8.9 9.8 11.2 11.5 11.0 10.8 10.6 8.9 9.3 9.3 9.7 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.42 3.06 3.93 3.74 4.39 5.82 6.24 5.04 4.72 5.82 4.02 2.71 4.41 MEAN OF MIXING RATIO AT 09 GMT. 3.60 2.98 4.21 3.58 4.10 5.28 6.24 5.51 5.45 5.62 4.20 3.12 4.49 MEAN OF MIXING RATIO AT 15 GMT. 3.51 3.02 3.95 3.19 4.16 4.30 5.64 5.29 5.01 5.85 4.05 3.17 4.26 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -5.5 -5.0 -2.5 -1.0 6.5 17.5 20.2 20.2 13.0 6.5 3.2 -4.0 -5.5 DAY 23 3 16 6 4 7 7 10 23 27 30 21 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 8.0 16.5 22.7 26.7 36.0 33.7 39.5 36.5 33.2 26.7 21.0 16.5 39.5 DAY 28 28 11 27 18 28 14 14 1 13 4 15 24 HOUR MAXIMUM PRECIPITATION IN MM. 26.0 8.0 16.5 7.5 4.0 0.0 0.0 0.0 1.5 6.0 7.5 11.0 26.0 DAY 11 14 2 1 11 ** ** ** 30 1 9 30 MONTHLY TOTAL PRECIPITATION IN MM. 111.5 8.0 26.5 8.0 7.0 0.0 0.0 0.0 1.5 23.3 15.0 13.0 213.8 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 68.3 7.0 0.7 24.0 NO. OF DAYS WITH PRECIPITATION. 8 1 4 2 2 0 0 0 1 8 4 2 32 NO. OF DAYS PRECIPITATION EQUAL 8 1 4 1 2 0 0 0 1 7 3 2 29 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 6 0 1 0 0 0 0 0 0 0 0 1 8 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 83 63 58 43 28 28 27 23 30 53 49 50 45 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 70 41 42 27 17 18 18 17 22 33 34 36 31 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 78 48 44 27 20 15 17 17 24 42 40 45 35 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 10 2 0 0 0 0 0 0 0 0 0 1 13 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 4 11 30 27 5 0 0 0 77 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 12 27 31 29 13 0 0 0 112 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 26 16 4 1 0 0 0 0 0 0 0 8 55 DATE OF START AND END FREEZING START = 19 DEC. END = 6 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 8.2 8.5 9.8 15.0 20.8 27.6 28.7 29.1 24.2 16.2 11.5 6.9 17.2 AVERAGE OF MINIMUM TEMPERATURE IN C. 3.7 4.3 5.3 10.0 15.9 22.0 23.5 23.8 18.9 11.8 6.4 2.7 12.4 AVERAGE OF MAXIMUM TEMPERATURE IN C. 12.7 12.8 14.3 19.9 25.6 33.2 34.0 34.4 29.5 20.6 16.6 11.1 22.1 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.0 8.5 9.0 9.9 9.7 11.2 10.5 10.6 10.6 8.8 10.2 8.4 9.7 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.46 3.10 3.79 4.97 5.70 4.99 6.25 4.98 4.76 6.34 3.08 3.07 4.54 MEAN OF MIXING RATIO AT 09 GMT. 3.65 3.22 3.81 4.36 5.37 4.97 6.14 5.76 5.30 6.40 3.40 3.41 4.65 MEAN OF MIXING RATIO AT 15 GMT. 3.60 3.48 3.76 4.87 4.76 4.30 5.72 6.02 5.60 6.41 3.34 3.47 4.61 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -1.7 1.0 -0.5 5.2 10.7 18.7 18.7 21.0 11.1 8.2 1.0 -1.5 -1.7 DAY 14 8 21 5 8 15 7 17 30 27 27 24 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 16.5 18.7 20.0 26.5 32.5 35.7 38.5 37.5 34.4 25.7 21.7 17.7 38.5 DAY 25 27 9 20 24 10 24 31 8 7 1 9 24 HOUR MAXIMUM PRECIPITATION IN MM. 9.0 28.0 16.5 8.0 8.0 1.0 0.0 0.0 8.0 7.0 0.0 7.0 28.0 DAY 30 2 1 18 6 4 ** ** 30 25 ** 27 MONTHLY TOTAL PRECIPITATION IN MM. 21.0 30.0 44.2 22.5 15.5 1.0 0.0 0.0 8.0 31.5 0.0 16.0 189.7 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 50.2 20.6 4.2 25.0 NO. OF DAYS WITH PRECIPITATION. 3 2 6 9 4 1 0 0 1 8 0 4 38 NO. OF DAYS PRECIPITATION EQUAL 3 2 6 6 4 1 0 0 1 8 0 4 35 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 3 0 0 0 0 0 0 0 0 0 4 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 56 49 56 52 40 22 27 21 29 61 40 54 42 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 40 34 39 30 27 16 18 17 20 42 27 40 29 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 45 42 40 38 27 14 17 18 25 48 35 50 33 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 1 22 27 31 8 0 0 0 89 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 1 30 30 31 10 0 0 0 102 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 2 0 2 0 0 0 0 0 0 0 0 5 9 DATE OF START AND END FREEZING START = 22 DEC. END = 24 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 4.1 2.6 8.1 12.6 20.5 25.0 29.3 29.2 24.5 17.3 11.3 5.0 15.8 AVERAGE OF MINIMUM TEMPERATURE IN C. 0.0 -1.4 2.8 7.8 15.3 19.4 23.9 23.8 19.5 12.2 7.0 0.8 10.9 AVERAGE OF MAXIMUM TEMPERATURE IN C. 8.3 6.6 13.4 17.3 25.7 30.5 34.7 34.6 29.4 22.4 15.5 9.3 20.6 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.3 8.0 10.6 9.5 10.4 11.1 10.8 10.8 9.9 10.2 8.5 8.5 9.7 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.77 3.02 2.92 4.35 5.61 4.33 6.83 4.36 4.78 4.37 4.61 2.95 4.24 MEAN OF MIXING RATIO AT 09 GMT. 3.16 3.29 2.67 3.77 5.07 4.44 7.09 5.73 5.61 4.90 5.01 3.40 4.51 MEAN OF MIXING RATIO AT 15 GMT. 3.17 3.15 2.80 4.11 4.67 4.07 6.63 6.07 5.39 4.81 4.80 3.34 4.42 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -4.5 -11.7 -4.7 -6.4 8.5 8.2 18.2 20.0 13.2 6.2 -2.4 -6.0 -11.7 DAY 24 3 3 2 1 6 6 29 26 23 30 25 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 15.5 14.7 18.2 24.7 30.2 34.0 39.0 37.0 36.0 25.0 23.7 16.2 39.0 DAY 16 24 27 24 25 17 7 21 4 11 1 15 24 HOUR MAXIMUM PRECIPITATION IN MM. 3.6 10.0 9.0 7.0 6.0 0.0 0.0 0.0 0.0 5.0 7.5 5.5 10.0 DAY 4 22 8 1 15 ** ** ** ** 12 25 4 MONTHLY TOTAL PRECIPITATION IN MM. 4.1 25.0 9.0 35.5 13.5 0.0 0.0 0.0 0.0 10.5 21.0 6.0 124.6 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 30.6 39.3 0.0 30.1 NO. OF DAYS WITH PRECIPITATION. 2 5 1 7 3 0 0 0 0 5 4 2 29 NO. OF DAYS PRECIPITATION EQUAL 1 5 1 7 3 0 0 0 0 4 4 1 26 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 0 0 0 0 0 0 0 0 0 0 1 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 59 67 50 53 39 23 29 19 29 40 59 55 44 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 45 53 27 33 25 18 21 16 22 28 42 43 31 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 55 55 33 39 24 15 19 18 23 35 50 52 35 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 2 6 1 1 0 0 0 0 0 0 0 4 14 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 12 30 29 10 0 0 0 81 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 1 0 0 0 0 0 0 0 0 0 0 1 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 2 20 30 31 12 0 0 0 95 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 21 17 7 2 0 0 0 0 0 0 3 13 63 DATE OF START AND END FREEZING START = 28 NOV. END = 2 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 3.0 4.0 9.3 14.2 20.1 24.4 28.4 28.6 25.0 18.6 10.7 6.0 16.0 AVERAGE OF MINIMUM TEMPERATURE IN C. -1.0 -0.2 5.3 9.7 14.9 18.5 22.9 23.1 19.3 13.6 6.9 2.5 11.3 AVERAGE OF MAXIMUM TEMPERATURE IN C. 7.0 8.2 13.4 18.8 25.3 30.2 33.9 34.0 30.8 23.7 14.5 9.5 20.8 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.0 8.4 8.1 9.1 10.4 11.7 11.0 10.9 11.5 10.1 7.6 7.0 9.5 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.05 2.95 3.88 5.14 6.55 6.63 6.02 5.74 3.65 4.52 5.51 4.02 4.81 MEAN OF MIXING RATIO AT 09 GMT. 2.94 3.28 3.82 4.86 5.94 6.00 5.97 6.62 4.43 4.83 6.22 4.19 4.93 MEAN OF MIXING RATIO AT 15 GMT. 3.05 3.35 3.47 4.63 5.75 5.13 6.18 7.82 4.21 4.56 6.38 4.42 4.91 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -9.0 -6.5 -3.5 2.0 11.0 11.2 16.5 13.2 15.0 5.5 3.0 -0.5 -9.0 DAY 23 8 24 4 3 18 13 21 20 29 19 23 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 14.7 17.7 21.2 26.5 31.0 35.5 38.0 38.5 35.5 29.0 18.5 13.7 38.5 DAY 14 29 14 18 21 28 5 17 4 4 8 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 14.0 16.0 10.5 19.0 22.5 7.0 0.0 0.0 0.0 8.0 16.5 8.5 22.5 DAY 22 3 17 2 30 23 ** ** ** 25 17 7 MONTHLY TOTAL PRECIPITATION IN MM. 25.5 30.5 38.5 38.0 36.0 13.5 0.0 0.0 0.0 9.0 63.5 36.0 290.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 32.5 30.1 0.0 37.3 NO. OF DAYS WITH PRECIPITATION. 6 3 6 5 7 4 0 0 0 2 10 9 52 NO. OF DAYS PRECIPITATION EQUAL 5 3 6 4 6 3 0 0 0 2 10 9 48 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 2 2 2 1 0 0 0 0 0 2 0 10 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 69 64 58 56 48 37 26 26 22 39 72 73 49 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 49 48 39 38 30 23 18 21 16 28 58 53 35 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 57 57 38 38 33 20 19 25 17 31 71 69 40 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 6 6 0 0 0 0 0 0 0 0 0 0 12 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 6 28 24 6 0 0 0 64 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 1 0 0 0 0 0 0 0 0 0 0 1 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 3 16 30 29 22 0 0 0 100 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 16 15 3 0 0 0 0 0 0 0 0 4 38 DATE OF START AND END FREEZING START = 13 DEC. END = 25 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. -0.3 1.7 10.4 14.3 20.9 ***** 28.0 26.8 22.4 18.5 8.0 7.2 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -3.6 -1.9 6.7 9.7 15.5 ***** 22.6 21.3 17.0 13.5 3.2 2.8 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.0 5.2 14.0 18.9 26.2 ***** 33.5 32.2 27.8 23.5 12.9 11.6 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 6.6 7.1 7.3 9.2 10.7 ***** 10.9 10.9 10.8 10.0 9.7 8.8 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.01 3.23 5.23 5.31 6.30 ***** 7.90 6.53 4.82 5.81 3.83 3.56 ***** MEAN OF MIXING RATIO AT 09 GMT. 3.38 3.69 5.78 5.18 5.79 ***** 8.51 7.24 5.33 6.00 3.80 3.72 ***** MEAN OF MIXING RATIO AT 15 GMT. 3.20 3.81 5.86 5.27 5.52 ***** 8.26 7.15 5.61 6.20 4.03 4.17 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -12.5 -8.2 -0.5 0.0 9.7 ***** 17.2 15.0 10.0 5.5 -3.2 -1.0 ****** DAY 8 3 24 14 9 ** 10 31 15 31 18 28 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 11.0 15.0 21.5 26.0 31.5 ***** 37.7 39.7 33.2 30.5 19.0 18.5 ****** DAY 21 27 31 1 27 ** 16 6 9 6 2 5 24 HOUR MAXIMUM PRECIPITATION IN MM. 39.0 9.0 20.5 19.5 0.0 ***** 2.0 9.0 4.5 10.0 12.0 11.0 ****** DAY 23 2 15 13 ** ** 11 26 12 30 3 27 MONTHLY TOTAL PRECIPITATION IN MM. 107.5 37.5 116.4 35.5 0.0 ***** 2.5 9.5 7.5 35.1 15.7 24.9 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 66.7 9.1 5.0 19.3 NO. OF DAYS WITH PRECIPITATION. 11 8 20 7 0 *** 2 2 3 12 3 5 *** NO. OF DAYS PRECIPITATION EQUAL 11 8 20 7 0 *** 1 1 2 11 2 3 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 4 0 4 1 0 *** 0 0 0 1 1 2 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 77 76 69 58 44 *** 36 33 34 52 63 62 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 71 65 61 39 27 *** 26 24 23 35 39 44 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 76 75 62 44 31 *** 27 26 28 44 51 61 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 13 8 0 0 0 *** 0 0 0 0 0 0 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 2 *** 23 21 3 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 9 0 0 0 0 *** 0 0 0 0 0 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 4 *** 26 24 10 4 0 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 *** 0 0 0 0 0 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 *** 0 0 0 0 0 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 23 18 1 1 0 *** 0 0 0 0 7 5 *** DATE OF START AND END FREEZING START = 16 NOV. END = 14 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 2.8 7.6 9.6 17.7 22.1 27.2 28.8 29.6 24.3 18.1 13.9 4.7 17.2 AVERAGE OF MINIMUM TEMPERATURE IN C. -0.9 2.4 4.9 12.5 16.3 21.1 23.6 23.9 18.5 12.3 8.6 0.6 12.0 AVERAGE OF MAXIMUM TEMPERATURE IN C. 6.5 12.7 14.3 22.9 27.8 33.3 34.0 35.2 30.0 23.9 19.1 8.8 22.4 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.4 10.3 9.4 10.4 11.5 12.2 10.4 11.3 11.5 11.6 10.5 8.2 10.4 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.22 3.03 3.61 4.48 5.13 5.05 7.77 6.51 4.76 3.09 3.90 3.08 4.47 MEAN OF MIXING RATIO AT 09 GMT. 3.92 2.85 3.78 4.54 4.74 5.43 7.64 7.75 5.75 3.68 4.07 3.51 4.81 MEAN OF MIXING RATIO AT 15 GMT. 3.64 2.99 3.97 4.36 3.83 5.12 7.20 7.29 5.92 3.56 3.84 3.70 4.62 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -8.5 -4.5 1.0 3.5 8.0 15.0 18.0 20.2 12.5 5.5 3.5 -4.5 -8.5 DAY 29 2 6 25 8 11 6 11 19 25 30 17 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 9.5 16.7 26.0 28.0 34.5 38.5 38.7 37.5 39.0 32.2 23.5 16.0 39.0 DAY 18 18 31 19 27 30 31 5 9 1 1 5 24 HOUR MAXIMUM PRECIPITATION IN MM. 19.3 0.0 15.5 19.5 7.5 0.0 4.0 0.0 0.0 0.0 16.2 20.5 20.5 DAY 27 ** 11 23 7 ** 18 ** ** ** 28 12 MONTHLY TOTAL PRECIPITATION IN MM. 36.3 0.0 45.4 21.5 11.8 0.0 4.5 0.0 0.0 0.0 24.4 57.5 201.4 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 40.6 16.5 2.2 40.7 NO. OF DAYS WITH PRECIPITATION. 7 0 8 2 5 0 2 0 0 0 3 4 31 NO. OF DAYS PRECIPITATION EQUAL 6 0 6 2 3 0 1 0 0 0 3 4 25 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 0 2 1 0 0 0 0 0 0 1 3 8 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 72 55 55 41 35 25 36 27 30 29 46 61 43 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 65 31 41 27 20 17 23 22 22 19 30 49 31 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 68 39 45 30 19 17 23 21 26 24 36 63 34 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 4 1 0 0 0 0 0 0 0 0 0 2 7 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 3 15 27 30 9 0 0 0 84 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 11 26 30 31 16 2 0 0 116 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 19 8 0 0 0 0 0 0 0 0 0 18 45 DATE OF START AND END FREEZING START = 10 DEC. END = 24 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 4.0 4.7 11.3 13.7 22.9 26.4 29.8 29.3 23.8 17.1 10.6 5.8 16.6 AVERAGE OF MINIMUM TEMPERATURE IN C. -0.5 0.2 6.3 8.9 17.4 20.6 24.3 23.8 18.1 11.4 6.0 1.7 11.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 8.5 9.2 16.3 18.6 28.4 32.2 35.3 34.7 29.5 22.9 15.2 9.9 21.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.0 9.0 10.0 9.7 11.0 11.6 11.0 10.9 11.4 11.5 9.2 8.2 10.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.55 2.93 4.28 5.07 6.00 5.68 6.02 5.51 4.40 3.78 4.70 3.17 4.51 MEAN OF MIXING RATIO AT 09 GMT. 3.40 3.20 3.79 5.41 5.70 6.01 6.68 6.07 5.08 4.10 4.86 3.42 4.81 MEAN OF MIXING RATIO AT 15 GMT. 3.49 3.25 3.89 4.59 5.61 5.56 6.82 6.29 6.02 4.25 4.77 3.62 4.85 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -4.5 -4.7 -1.2 1.2 13.0 15.0 19.0 20.0 13.2 8.2 3.0 -4.0 -4.7 DAY 27 2 16 3 2 6 25 1 20 28 16 23 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 16.5 15.7 22.0 24.0 31.7 36.0 39.5 37.2 35.7 27.0 20.5 15.5 39.5 DAY 4 22 18 27 28 22 6 6 2 16 4 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 10.5 12.0 3.5 16.5 1.5 0.0 0.5 0.0 0.0 2.8 15.0 16.0 16.5 DAY 15 13 19 24 19 ** 31 ** ** 27 19 30 MONTHLY TOTAL PRECIPITATION IN MM. 23.5 35.6 8.5 66.0 3.0 0.0 0.5 0.0 0.0 3.0 40.3 28.3 208.7 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 32.4 33.1 0.2 34.3 NO. OF DAYS WITH PRECIPITATION. 4 8 5 10 2 0 1 0 0 2 9 7 48 NO. OF DAYS PRECIPITATION EQUAL 4 6 4 10 2 0 0 0 0 1 7 7 41 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 2 0 3 0 0 0 0 0 0 1 1 8 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 55 61 57 57 37 27 26 25 29 36 65 57 44 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 49 46 33 41 23 20 19 18 19 22 44 45 32 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 63 53 38 39 26 19 20 19 26 29 52 57 37 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 1 2 0 0 0 0 0 0 0 0 0 2 5 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 2 20 28 27 9 0 0 0 86 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 7 25 31 30 13 0 0 0 106 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 18 14 2 0 0 0 0 0 0 0 0 10 44 DATE OF START AND END FREEZING START = 18 DEC. END = 16 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. -2.0 -1.1 6.2 15.9 16.8 25.3 28.7 25.5 24.9 20.3 11.0 0.9 14.4 AVERAGE OF MINIMUM TEMPERATURE IN C. -6.4 -6.1 1.4 10.1 11.3 19.2 23.0 19.8 19.2 14.5 5.7 -2.7 9.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.3 3.9 11.1 21.7 22.3 31.5 34.5 31.1 30.5 26.1 16.4 4.6 19.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.7 10.0 9.7 11.6 11.0 12.3 11.5 11.3 11.3 11.6 10.7 7.3 10.6 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.75 2.86 3.92 4.87 6.36 7.14 6.64 6.09 3.78 3.99 3.62 3.03 4.59 MEAN OF MIXING RATIO AT 09 GMT. 3.17 3.38 4.30 4.76 6.25 6.79 7.35 6.29 4.79 4.24 3.79 3.40 4.87 MEAN OF MIXING RATIO AT 15 GMT. 3.12 3.38 4.05 4.47 5.94 5.97 6.97 6.19 5.08 4.89 3.93 3.58 4.80 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -15.5 -12.0 -1.7 3.0 5.2 15.2 20.5 14.7 14.0 6.2 3.0 -10.5 -15.5 DAY 24 2 20 3 8 17 28 26 19 31 9 24 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 9.5 10.5 18.0 27.5 28.2 39.0 36.7 35.7 34.7 30.2 19.5 10.0 39.0 DAY 19 19 30 30 27 24 6 16 2 1 2 13 24 HOUR MAXIMUM PRECIPITATION IN MM. 13.0 18.5 25.0 8.5 10.0 10.2 0.2 4.0 0.0 0.5 18.0 12.5 25.0 DAY 7 20 21 5 10 17 16 24 ** 9 29 12 MONTHLY TOTAL PRECIPITATION IN MM. 46.2 57.5 116.3 21.5 35.1 10.9 0.2 9.0 0.0 1.2 46.5 62.0 406.4 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 54.1 16.6 2.3 27.0 NO. OF DAYS WITH PRECIPITATION. 9 5 12 5 14 3 1 3 0 3 3 10 68 NO. OF DAYS PRECIPITATION EQUAL 8 5 12 4 7 1 0 3 0 0 3 9 52 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 3 7 0 1 1 0 0 0 0 3 3 19 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 83 82 72 49 58 36 29 32 22 32 50 70 51 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 71 64 56 29 37 25 21 22 17 19 33 61 38 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 83 78 60 31 41 24 21 23 22 28 42 74 44 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 24 18 0 0 0 0 0 0 0 0 0 11 53 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 6 29 11 8 0 0 0 54 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 8 6 0 0 0 0 0 0 0 0 0 4 18 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 21 31 22 16 1 0 0 91 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 31 27 9 0 0 0 0 0 0 0 0 20 87 DATE OF START AND END FREEZING START = 2 DEC. END = 28 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. -1.2 6.4 9.0 14.4 20.2 27.1 29.5 28.9 24.0 19.4 9.6 3.7 15.9 AVERAGE OF MINIMUM TEMPERATURE IN C. -5.7 1.4 3.3 8.6 13.7 21.0 23.7 23.2 18.0 13.4 2.7 -1.4 10.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.3 11.5 14.6 20.1 26.6 33.3 35.4 34.6 29.9 25.3 16.5 8.8 21.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.0 10.1 11.3 11.5 12.9 12.3 11.7 11.4 11.9 11.9 13.8 10.2 11.5 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.31 3.34 2.80 3.83 5.21 5.83 7.01 5.69 4.89 3.44 3.10 2.68 4.18 MEAN OF MIXING RATIO AT 09 GMT. 2.62 3.69 2.91 3.57 4.69 5.40 7.08 6.49 5.99 3.93 2.84 2.61 4.32 MEAN OF MIXING RATIO AT 15 GMT. 3.10 3.91 3.02 3.33 3.97 5.43 7.51 7.31 6.02 4.15 2.95 3.10 4.48 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -12.5 -6.5 -2.5 3.7 8.0 13.2 21.5 19.5 10.2 9.2 -4.0 -6.7 -12.5 DAY 2 7 10 20 24 14 3 16 27 14 8 14 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 8.0 20.0 20.7 27.5 32.0 38.0 40.2 38.2 34.7 29.5 23.5 15.0 40.2 DAY 29 19 2 27 29 28 15 4 1 7 2 4 24 HOUR MAXIMUM PRECIPITATION IN MM. 9.0 32.0 4.0 7.0 0.2 0.2 0.0 0.0 0.0 0.0 13.7 11.0 32.0 DAY 17 22 3 17 11 9 ** ** ** ** 23 30 MONTHLY TOTAL PRECIPITATION IN MM. 26.5 65.0 5.5 21.5 0.2 0.2 0.0 0.0 0.0 0.0 17.7 34.0 170.6 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 56.9 12.8 0.0 30.3 NO. OF DAYS WITH PRECIPITATION. 7 6 3 6 1 1 0 0 0 0 2 6 32 NO. OF DAYS PRECIPITATION EQUAL 7 6 2 5 0 0 0 0 0 0 2 5 27 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 3 0 0 0 0 0 0 0 0 1 2 6 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 66 60 43 42 38 27 28 25 30 27 48 61 41 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 53 45 29 26 21 16 20 18 23 18 25 39 28 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 76 56 34 26 20 18 22 23 28 25 33 59 35 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 20 2 0 0 0 0 0 0 0 0 1 5 28 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 1 15 31 28 5 0 0 0 80 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 5 0 0 0 0 0 0 0 0 0 0 0 5 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 6 24 31 31 18 0 0 0 110 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 1 0 0 0 0 0 1 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 31 10 4 0 0 0 0 0 0 0 12 21 78 DATE OF START AND END FREEZING START = 7 NOV. END = 30 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. -0.8 0.4 9.8 13.1 ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -4.6 -3.6 5.4 7.6 ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.9 4.3 14.2 18.7 ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.5 7.9 8.8 11.1 ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.78 2.96 4.74 4.29 ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. 3.38 3.74 5.06 4.51 ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. 3.38 3.54 4.94 4.76 ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -8.0 -9.0 -3.5 1.5 ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY 19 3 7 3 ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 5.0 9.5 24.5 26.2 ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY 23 14 20 23 ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. 14.0 13.0 9.0 9.5 ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY 14 18 4 5 ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. 73.0 63.5 36.3 40.9 ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 80.9 19.1 ***** ***** NO. OF DAYS WITH PRECIPITATION. 14 11 9 9 *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL 13 11 8 8 *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 1 0 0 *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 78 78 67 52 *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 70 70 53 37 *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 83 76 57 41 *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 19 11 0 0 *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 2 5 0 0 *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 31 24 6 0 *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = 1 JAN. END = 10 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 5.8 ***** 11.5 ***** ***** 23.4 28.5 28.0 23.5 16.8 ***** 8.1 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. 1.0 ***** 6.6 9.7 14.3 18.3 22.3 22.8 17.1 11.2 ***** 3.0 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 9.6 ***** 17.3 ***** ***** 28.7 32.8 32.4 29.7 21.8 ***** 12.9 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.6 ***** 10.7 ***** ***** 10.4 10.5 9.6 12.6 10.6 ***** 9.9 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.96 ***** 8.22 10.83 14.19 16.21 21.02 19.14 13.12 8.79 ***** 5.12 ***** MEAN OF MIXING RATIO AT 09 GMT. 6.69 ***** 10.49 13.00 18.48 16.89 24.86 24.81 16.97 10.01 ***** 5.95 ***** MEAN OF MIXING RATIO AT 15 GMT. 5.79 ***** 10.29 12.87 17.11 18.20 27.66 24.51 18.32 10.44 ***** 5.50 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -2.0 ***** -1.0 3.0 7.0 14.0 18.0 21.0 9.8 7.0 ***** 0.0 ****** DAY 23 ** 4 7 5 7 8 19 24 16 ** 20 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 14.0 ***** 22.0 ***** ***** 32.0 37.5 35.0 33.6 26.2 ***** 17.2 ****** DAY 5 ** 25 ** ** 24 19 8 14 4 ** 16 24 HOUR MAXIMUM PRECIPITATION IN MM. 0.0 ***** 0.0 0.0 0.0 0.0 4.0 0.0 0.0 0.0 ***** 0.0 ****** DAY ** ** ** ** ** ** 22 ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. 0.0 ***** 0.0 0.0 0.0 0.0 4.0 0.0 0.0 0.0 ***** 0.0 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 0.0 0.0 100.0 0.0 NO. OF DAYS WITH PRECIPITATION. 0 *** 0 0 0 0 1 0 0 0 *** 0 *** NO. OF DAYS PRECIPITATION EQUAL 0 *** 0 0 0 0 1 0 0 0 *** 0 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 *** 0 0 0 0 0 0 0 0 *** 0 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 88 *** 88 88 83 80 79 77 74 74 *** 81 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 83 *** 81 83 84 62 71 71 59 57 *** 60 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 88 *** 89 90 87 73 82 80 76 77 *** 74 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 *** 0 0 0 0 0 0 0 0 *** 0 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 *** 0 0 1 6 12 23 4 0 *** 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** 0 *** *** 0 0 0 0 0 *** 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** 0 *** *** 8 23 26 11 0 *** 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** 0 *** *** 0 0 0 0 0 *** 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** 0 *** *** 0 0 0 0 0 *** 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 6 *** 1 0 0 0 0 0 0 0 *** 1 *** DATE OF START AND END FREEZING START = 20 DEC. END = 4 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 3.9 1.8 7.5 18.0 21.3 26.1 27.8 26.7 23.0 17.0 8.0 2.3 15.3 AVERAGE OF MINIMUM TEMPERATURE IN C. -0.6 -3.3 2.9 12.5 15.8 20.3 22.2 21.5 17.2 11.3 4.6 -3.2 10.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. 8.3 6.9 12.3 23.6 26.7 31.7 33.5 32.0 28.9 22.5 11.6 6.4 20.4 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.9 10.2 9.4 11.1 10.9 11.4 11.3 10.5 11.7 11.2 7.0 9.6 10.3 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.25 3.69 5.44 10.28 13.90 15.11 12.83 14.36 10.25 9.09 6.12 3.39 9.06 MEAN OF MIXING RATIO AT 09 GMT. 5.02 4.82 6.66 11.90 14.01 16.10 12.80 14.46 11.40 10.10 7.52 5.53 10.03 MEAN OF MIXING RATIO AT 15 GMT. 4.75 4.46 6.02 11.46 14.23 17.86 14.47 15.84 12.54 9.98 6.82 4.07 10.21 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -6.1 -9.0 -3.5 5.5 11.5 15.4 17.0 18.6 10.5 7.0 -3.6 -8.5 -9.0 DAY 23 18 1 10 24 2 1 23 4 11 30 10 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 13.6 12.1 17.0 29.0 31.5 36.8 36.2 36.8 32.0 25.0 17.0 10.0 36.8 DAY 11 4 18 27 19 8 17 5 5 1 7 20 24 HOUR MAXIMUM PRECIPITATION IN MM. 3.5 0.0 3.0 0.0 0.0 0.0 0.0 0.0 0.0 3.0 2.0 0.0 3.5 DAY 7 ** 18 ** ** ** ** ** ** 4 9 ** MONTHLY TOTAL PRECIPITATION IN MM. 7.0 0.0 3.0 0.0 0.0 0.0 0.0 0.0 0.0 5.0 2.0 0.0 17.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 58.8 0.0 0.0 41.2 NO. OF DAYS WITH PRECIPITATION. 3 0 1 0 0 0 0 0 0 2 1 0 7 NO. OF DAYS PRECIPITATION EQUAL 3 0 1 0 0 0 0 0 0 2 1 0 7 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 86 86 79 76 79 69 49 63 60 80 90 81 75 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 72 77 71 61 61 53 38 46 43 54 82 88 62 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 81 82 81 70 72 63 46 55 57 68 90 86 71 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 8 10 0 0 0 0 0 0 0 0 0 9 27 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 13 19 15 0 0 0 0 47 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 3 21 28 25 11 0 0 0 88 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 12 21 9 0 0 0 0 0 0 0 1 20 63 DATE OF START AND END FREEZING START = 30 NOV. END = 26 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. -0.1 3.9 ***** 13.7 20.6 25.9 29.7 29.0 ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -4.8 -1.3 ***** 8.5 15.2 19.9 23.8 23.9 ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 4.8 9.2 ***** 18.9 25.9 32.0 35.5 34.2 ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.6 10.5 ***** 10.4 10.7 12.1 11.7 10.3 ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.22 4.03 ***** 7.71 11.10 13.06 15.20 15.15 ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. 4.55 5.43 ***** 8.23 11.23 13.23 15.54 17.78 ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. 3.37 4.40 ***** 8.16 10.66 14.49 18.75 19.79 ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -12.5 -8.5 ***** 1.6 9.5 16.2 19.2 18.9 ***** ***** ***** ***** ****** DAY 27 23 ** 2 3 9 1 27 ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 11.0 11.9 ***** 24.0 30.1 35.1 37.5 38.6 ***** ***** ***** ***** ****** DAY 21 26 ** 18 17 18 5 16 ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. 0.0 0.0 ***** 0.0 2.2 0.0 0.0 0.0 ***** ***** ***** ***** ****** DAY ** ** ** ** 29 ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. 0.0 0.0 ***** 0.0 7.5 0.0 0.0 0.0 ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 0.0 100.0 0.0 ***** NO. OF DAYS WITH PRECIPITATION. 0 0 *** 0 6 0 0 0 *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL 0 0 *** 0 4 0 0 0 *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 *** 0 0 0 0 0 *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 83 78 *** 75 66 55 55 60 *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 82 73 *** 61 52 42 40 48 *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 83 77 *** 73 57 49 54 61 *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 12 5 *** 0 0 0 0 0 *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 *** 0 0 10 26 24 *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 4 0 *** 0 0 0 0 0 *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 *** 0 2 26 28 26 *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 *** 0 0 0 0 0 *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 *** 0 0 0 0 0 *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 19 15 *** 0 0 0 0 0 *** *** *** *** *** DATE OF START AND END FREEZING START = 1 JAN. END = 28 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** ***** ***** NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** *** *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** *** *** *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** *** *** *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 3.1 2.8 8.3 16.5 19.6 26.0 29.4 29.0 24.6 17.9 11.7 4.5 16.1 AVERAGE OF MINIMUM TEMPERATURE IN C. 0.1 -0.5 4.9 12.0 14.6 20.9 24.6 24.1 19.9 13.8 7.9 1.5 12.0 AVERAGE OF MAXIMUM TEMPERATURE IN C. 6.1 6.2 11.6 21.0 24.7 31.0 34.2 33.8 29.3 22.0 15.4 7.4 20.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 6.0 6.7 6.7 9.0 10.1 10.1 9.6 9.7 9.4 8.2 7.5 5.9 8.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.40 3.04 4.58 4.51 5.33 5.78 6.47 5.93 5.58 5.23 3.84 3.42 4.76 MEAN OF MIXING RATIO AT 09 GMT. 3.65 3.26 4.95 3.95 4.41 4.77 5.59 5.53 6.24 4.62 3.83 3.18 4.50 MEAN OF MIXING RATIO AT 15 GMT. 3.74 3.20 4.87 3.90 4.22 4.29 5.31 5.38 5.70 4.78 3.99 3.38 4.40 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -4.0 -8.0 -3.6 5.0 8.0 16.6 20.0 20.2 11.8 11.2 3.0 -3.5 -8.0 DAY 28 13 11 13 6 19 15 28 28 16 28 22 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 9.6 12.5 19.5 27.5 29.5 35.6 37.0 38.5 35.0 24.6 22.5 13.0 38.5 DAY 31 28 30 22 29 29 7 6 8 27 3 10 24 HOUR MAXIMUM PRECIPITATION IN MM. 9.0 11.0 31.0 13.0 2.0 4.0 0.0 0.0 0.0 1.0 0.0 20.0 31.0 DAY 22 21 6 4 3 19 ** ** ** 15 ** 9 MONTHLY TOTAL PRECIPITATION IN MM. 22.1 33.7 124.5 22.6 8.7 4.0 0.0 0.0 0.0 2.3 0.0 74.9 292.8 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 61.6 12.1 0.0 26.4 NO. OF DAYS WITH PRECIPITATION. 10 14 14 5 6 1 0 0 0 4 0 12 66 NO. OF DAYS PRECIPITATION EQUAL 6 7 12 3 5 1 0 0 0 1 0 10 45 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 5 1 0 0 0 0 0 0 0 4 11 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 70 65 66 41 41 29 27 26 33 44 49 63 46 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 60 55 58 27 24 18 17 17 24 28 34 48 34 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 66 57 56 27 24 16 15 17 23 31 40 56 36 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 1 6 0 0 0 0 0 0 0 0 0 0 7 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 16 30 29 14 0 0 0 89 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 3 0 0 0 0 0 0 0 0 0 0 3 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 23 31 30 18 0 0 0 102 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 18 15 2 0 0 0 0 0 0 0 0 16 51 DATE OF START AND END FREEZING START = 16 DEC. END = 12 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 0.4 3.2 4.9 13.8 16.5 24.8 30.4 26.6 22.8 17.7 12.2 ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -2.5 -0.1 1.3 9.4 12.3 19.8 25.8 21.9 17.8 12.9 8.3 ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.3 6.6 8.4 18.2 20.7 29.8 35.1 31.3 27.7 22.5 16.2 ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 5.8 6.7 7.1 8.8 8.4 10.0 9.3 9.4 9.9 9.6 7.9 ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.62 2.58 3.25 4.41 6.10 6.10 6.47 6.59 4.22 3.92 3.92 ***** ***** MEAN OF MIXING RATIO AT 09 GMT. 2.73 2.66 3.31 3.87 5.39 5.12 5.55 5.91 4.08 3.63 3.81 ***** ***** MEAN OF MIXING RATIO AT 15 GMT. 2.65 2.70 3.32 3.62 5.20 4.72 5.08 5.76 4.04 4.14 4.19 ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -8.0 -5.2 -6.0 3.5 4.5 15.0 21.5 15.0 11.0 9.5 -1.2 ***** ****** DAY 28 12 11 3 5 9 12 31 2 18 28 ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 8.2 12.4 17.5 25.0 29.4 35.8 38.4 35.5 30.6 26.2 20.6 ***** ****** DAY 2 22 29 21 30 30 5 25 25 13 2 ** 24 HOUR MAXIMUM PRECIPITATION IN MM. 13.0 18.3 15.0 24.9 21.8 5.0 0.0 4.0 0.0 0.2 6.0 ***** ****** DAY 31 25 15 27 2 3 ** 29 ** 8 8 ** MONTHLY TOTAL PRECIPITATION IN MM. 39.7 37.1 78.2 48.4 63.6 12.2 0.0 4.0 0.0 0.2 6.1 ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 53.5 42.9 1.4 2.2 NO. OF DAYS WITH PRECIPITATION. 10 11 13 10 16 8 0 1 0 1 2 *** *** NO. OF DAYS PRECIPITATION EQUAL 7 6 12 8 11 4 0 1 0 0 1 *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 2 3 1 2 0 0 0 0 0 0 *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 65 55 61 48 56 32 25 33 28 36 46 *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 53 42 46 31 41 19 16 22 17 21 32 *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 57 47 49 31 37 19 14 20 18 28 40 *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 12 3 4 0 0 0 0 0 0 0 0 *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 10 31 22 0 0 0 *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 5 0 1 0 0 0 0 0 0 0 0 *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 13 31 24 2 0 0 *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 24 17 12 0 0 0 0 0 0 0 2 *** *** DATE OF START AND END FREEZING START = 27 NOV. END = 25 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 1.2 ***** 7.5 15.5 19.6 26.1 28.7 28.1 25.9 16.3 7.9 6.4 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -1.9 ***** 3.8 11.2 15.2 21.0 24.0 23.3 21.2 12.2 4.8 3.2 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 4.3 ***** 11.2 19.8 24.0 31.1 33.4 32.8 30.7 20.5 11.0 9.5 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 6.2 ***** 7.4 8.6 8.8 10.1 9.4 9.5 9.5 8.3 6.2 6.3 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.57 ***** 3.12 4.53 5.49 5.31 6.86 6.66 5.22 4.06 5.16 4.10 ***** MEAN OF MIXING RATIO AT 09 GMT. 2.73 ***** 2.77 3.69 4.45 4.94 6.03 5.81 4.41 3.49 4.98 4.03 ***** MEAN OF MIXING RATIO AT 15 GMT. 2.77 ***** 2.64 3.67 4.29 3.43 5.65 5.74 4.60 3.80 5.04 4.49 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -5.4 ***** -3.0 6.5 8.6 15.6 22.0 20.2 15.8 6.8 -1.5 -1.6 ****** DAY 21 ** 23 14 9 22 17 25 27 8 15 6 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 12.4 ***** 20.4 27.4 29.2 36.0 36.8 36.2 34.5 29.0 17.6 14.5 ****** DAY 29 ** 30 19 19 29 3 14 4 1 3 26 24 HOUR MAXIMUM PRECIPITATION IN MM. 22.0 ***** 17.0 8.0 3.0 1.0 0.0 1.0 0.0 3.0 16.0 13.0 ****** DAY 8 ** 8 8 14 1 ** 29 ** 29 3 16 MONTHLY TOTAL PRECIPITATION IN MM. 39.9 ***** 60.3 24.9 8.8 2.0 0.0 1.0 0.0 5.1 66.5 19.2 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 44.0 15.7 0.4 39.9 NO. OF DAYS WITH PRECIPITATION. 7 *** 10 7 8 2 0 1 0 2 13 5 *** NO. OF DAYS PRECIPITATION EQUAL 6 *** 9 6 5 2 0 1 0 2 10 3 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 *** 3 0 0 0 0 0 0 0 2 1 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 64 *** 52 45 41 28 29 30 28 39 74 69 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 53 *** 35 27 25 17 19 19 16 24 58 52 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 59 *** 34 28 24 12 17 18 18 29 64 64 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 7 *** 0 0 0 0 0 0 0 0 0 0 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 *** 0 0 2 19 31 29 19 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 2 *** 0 0 0 0 0 0 0 0 0 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** 0 0 0 20 31 29 19 0 0 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** 0 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** 0 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 26 *** 6 0 0 0 0 0 0 0 4 3 *** DATE OF START AND END FREEZING START = 14 NOV. END = 23 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 5.3 4.9 11.2 16.9 20.2 26.3 30.1 30.3 22.3 16.6 11.6 3.2 16.6 AVERAGE OF MINIMUM TEMPERATURE IN C. 2.1 1.5 7.4 12.3 15.3 21.1 25.2 25.5 17.7 12.6 8.2 0.0 12.4 AVERAGE OF MAXIMUM TEMPERATURE IN C. 8.4 8.2 15.1 21.6 25.0 31.4 35.0 35.0 27.0 20.5 15.1 6.3 20.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 6.3 6.7 7.7 9.3 9.7 10.3 9.8 9.5 9.3 7.9 6.9 6.3 8.3 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.87 3.07 3.86 4.72 5.39 5.75 6.53 5.52 4.89 5.98 5.23 2.99 4.82 MEAN OF MIXING RATIO AT 09 GMT. 3.98 2.89 3.43 4.21 4.07 4.77 6.08 5.45 4.66 5.67 4.79 2.95 4.41 MEAN OF MIXING RATIO AT 15 GMT. 4.05 3.04 3.41 4.02 4.04 4.30 5.89 5.46 4.57 6.13 5.31 2.91 4.43 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -1.0 -3.6 2.4 2.0 8.5 11.8 17.8 23.0 14.5 9.0 2.0 -7.2 -7.2 DAY 12 4 17 5 7 5 1 10 21 25 26 7 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 16.0 14.8 22.0 29.0 31.0 34.4 38.8 38.0 34.0 23.6 19.5 12.6 38.8 DAY 3 27 31 22 31 16 30 1 1 2 3 3 24 HOUR MAXIMUM PRECIPITATION IN MM. 12.0 37.0 14.0 15.0 12.0 2.0 0.0 0.0 0.0 23.0 37.0 3.0 37.0 DAY 17 1 12 30 6 3 ** ** ** 4 26 1 MONTHLY TOTAL PRECIPITATION IN MM. 53.4 51.6 30.6 19.2 38.5 3.0 0.0 0.0 0.0 35.7 146.8 6.2 385.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 35.2 15.8 0.0 49.0 NO. OF DAYS WITH PRECIPITATION. 9 4 8 7 6 2 0 0 0 8 15 5 64 NO. OF DAYS PRECIPITATION EQUAL 8 4 7 4 5 2 0 0 0 4 12 2 48 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 1 1 1 2 0 0 0 0 1 5 0 13 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 69 59 51 42 39 29 26 22 31 54 62 60 45 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 55 42 33 27 21 17 18 16 21 36 43 46 31 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 61 46 34 27 22 15 16 15 21 44 51 49 33 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 7 7 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 17 29 31 2 0 0 0 79 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 3 3 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 4 25 31 31 5 0 0 0 96 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 6 8 0 0 0 0 0 0 0 0 0 16 30 DATE OF START AND END FREEZING START = 5 DEC. END = 20 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 6.2 7.0 10.9 15.6 19.9 25.2 31.3 30.8 24.3 17.0 12.8 3.6 17.0 AVERAGE OF MINIMUM TEMPERATURE IN C. 2.6 3.5 6.7 11.2 15.2 20.1 26.2 26.0 19.6 12.9 8.4 0.4 12.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 9.9 10.5 15.1 19.9 24.6 30.3 36.3 35.6 29.0 21.2 17.1 6.7 21.4 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.3 7.0 8.4 8.7 9.4 10.2 10.1 9.6 9.4 8.3 8.7 6.3 8.6 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.40 3.45 3.35 5.11 5.62 6.42 6.58 6.06 5.54 4.52 2.93 3.05 4.67 MEAN OF MIXING RATIO AT 09 GMT. 3.10 3.27 3.14 4.79 5.14 5.79 6.63 5.16 4.43 4.24 2.83 3.27 4.32 MEAN OF MIXING RATIO AT 15 GMT. 3.19 3.21 2.92 4.61 5.06 4.56 5.40 4.58 4.24 4.10 2.89 3.13 3.99 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -1.0 -1.0 1.7 5.5 9.2 14.0 21.7 19.5 12.5 7.0 -1.8 -2.5 -2.5 DAY 21 25 27 7 9 1 1 31 22 19 26 20 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 15.0 15.2 20.6 25.0 29.6 34.4 41.0 38.5 32.7 29.5 22.6 12.0 41.0 DAY 31 4 24 3 22 29 16 5 11 4 2 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 4.1 11.0 16.0 31.0 4.2 2.0 0.0 0.0 0.8 3.3 0.0 6.0 31.0 DAY 17 24 17 24 26 1 ** ** 22 25 ** 13 MONTHLY TOTAL PRECIPITATION IN MM. 6.5 19.6 31.2 44.2 16.4 2.4 0.0 0.0 0.8 4.2 0.0 23.7 149.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 38.5 42.3 0.5 18.7 NO. OF DAYS WITH PRECIPITATION. 4 8 7 9 11 3 0 0 1 2 0 6 51 NO. OF DAYS PRECIPITATION EQUAL 2 4 6 5 7 1 0 0 0 1 0 6 32 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 1 1 0 0 0 0 0 0 0 0 3 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 59 58 44 49 41 33 23 22 32 41 33 63 42 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 39 42 30 33 27 22 18 14 18 27 22 53 29 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 44 42 29 33 28 17 14 12 18 28 25 55 29 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 12 31 30 13 0 0 0 86 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 19 31 31 16 0 0 0 97 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 1 0 0 0 0 0 1 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 4 3 0 0 0 0 0 0 0 0 1 12 20 DATE OF START AND END FREEZING START = 26 NOV. END = 26 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 1.8 5.9 6.2 13.9 21.2 26.7 28.6 28.9 26.5 17.4 10.6 7.8 16.3 AVERAGE OF MINIMUM TEMPERATURE IN C. -0.8 2.5 3.1 9.8 16.5 21.8 23.9 24.3 21.8 12.8 6.7 4.4 12.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 4.5 9.2 9.4 18.1 26.0 31.6 33.2 33.6 31.2 21.9 14.5 11.2 20.4 DIFFERENCE BETWEEN AVERAGE MAXIMUM 5.3 6.7 6.3 8.3 9.5 9.8 9.3 9.3 9.4 9.1 7.8 6.8 8.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.09 4.07 4.06 4.99 6.65 6.23 6.39 6.29 4.81 4.85 3.66 3.38 4.87 MEAN OF MIXING RATIO AT 09 GMT. 3.41 4.14 4.14 4.67 6.15 5.26 5.97 5.39 4.57 4.33 3.25 3.41 4.56 MEAN OF MIXING RATIO AT 15 GMT. 3.18 3.91 4.13 4.38 5.60 4.93 5.87 4.93 4.53 4.41 3.28 3.20 4.36 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -6.6 -3.0 -1.4 3.5 12.0 16.4 19.0 20.0 16.6 7.0 0.8 0.6 -6.6 DAY 19 6 1 5 8 28 15 30 24 17 13 3 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.5 16.0 21.7 23.0 32.5 36.0 35.7 36.2 35.2 25.8 19.5 16.0 36.2 DAY 3 10 31 22 31 4 3 11 17 1 6 28 24 HOUR MAXIMUM PRECIPITATION IN MM. 11.0 30.0 60.0 30.0 13.0 14.0 0.4 0.0 0.0 11.0 0.3 9.1 60.0 DAY 19 2 2 3 8 28 12 ** ** 16 9 22 MONTHLY TOTAL PRECIPITATION IN MM. 76.6 91.5 182.4 68.5 38.4 15.4 0.4 0.0 0.0 22.4 0.3 15.1 511.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 68.6 23.9 0.1 7.4 NO. OF DAYS WITH PRECIPITATION. 12 14 15 11 8 3 1 0 0 3 1 2 70 NO. OF DAYS PRECIPITATION EQUAL 12 10 13 8 6 2 0 0 0 2 0 2 55 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 5 5 2 2 1 0 0 0 2 0 0 19 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 68 71 70 52 44 30 27 27 24 43 48 53 46 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 62 59 59 37 30 19 18 17 16 26 30 40 34 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 64 58 61 37 29 17 18 15 16 29 34 40 35 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 8 0 0 0 0 0 0 0 0 0 0 0 8 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 2 20 29 29 21 0 0 0 101 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 5 0 0 0 0 0 0 0 0 0 0 0 5 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 4 24 31 29 23 0 0 0 111 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 19 6 5 0 0 0 0 0 0 0 0 0 30 DATE OF START AND END FREEZING START = 10 JAN. END = 20 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 5.8 4.8 7.1 15.1 21.0 26.8 31.1 30.8 24.8 20.0 10.2 5.6 16.9 AVERAGE OF MINIMUM TEMPERATURE IN C. 2.4 0.7 3.3 10.7 16.4 22.0 26.4 26.1 20.2 15.7 7.3 2.7 12.8 AVERAGE OF MAXIMUM TEMPERATURE IN C. 9.2 8.9 11.0 19.5 25.6 31.7 35.7 35.6 29.3 24.3 13.1 8.5 21.0 DIFFERENCE BETWEEN AVERAGE MAXIMUM 6.8 8.2 7.7 8.8 9.2 9.7 9.3 9.5 9.1 8.6 5.8 5.8 8.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.87 2.18 3.36 3.74 4.40 6.46 7.32 5.16 4.83 4.80 5.12 4.27 4.54 MEAN OF MIXING RATIO AT 09 GMT. 2.91 2.10 3.06 3.92 4.44 5.98 7.72 5.37 4.07 4.09 4.84 4.32 4.40 MEAN OF MIXING RATIO AT 15 GMT. 2.81 1.91 3.04 3.58 4.13 5.00 6.62 5.09 4.11 4.45 5.30 4.61 4.22 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -7.4 -6.4 -4.4 0.5 9.5 17.2 21.0 22.0 13.6 10.0 2.6 -1.0 -7.4 DAY 29 7 8 12 6 2 7 29 15 25 27 28 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 14.4 14.4 17.0 28.0 33.0 35.0 38.8 38.8 35.0 28.8 16.4 13.0 38.8 DAY 7 18 22 26 28 27 14 15 1 4 5 8 24 HOUR MAXIMUM PRECIPITATION IN MM. 6.0 3.0 10.0 6.0 0.3 8.0 0.6 0.0 0.0 0.4 18.0 25.0 25.0 DAY 16 19 4 6 5 24 6 ** ** 7 2 10 MONTHLY TOTAL PRECIPITATION IN MM. 7.0 5.0 55.4 12.6 0.3 11.3 0.6 0.0 0.0 1.0 35.3 56.7 185.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 36.4 13.1 0.3 50.2 NO. OF DAYS WITH PRECIPITATION. 2 2 11 5 1 4 1 0 0 3 9 10 48 NO. OF DAYS PRECIPITATION EQUAL 2 2 7 2 0 3 0 0 0 0 6 6 28 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 4 0 0 0 0 0 0 0 1 3 8 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 51 41 56 37 30 31 27 20 27 36 65 75 41 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 38 28 38 29 22 20 21 15 16 21 49 59 30 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 39 27 37 26 21 17 17 13 17 25 59 69 31 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 1 4 1 0 0 0 0 0 0 0 0 0 6 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 2 22 31 31 9 1 0 0 96 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 6 25 31 31 11 0 0 0 104 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 7 14 6 0 0 0 0 0 0 0 0 3 30 DATE OF START AND END FREEZING START = 27 DEC. END = 21 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 1.9 4.2 9.3 17.1 20.5 27.9 29.6 29.1 25.2 18.9 15.0 10.4 17.4 AVERAGE OF MINIMUM TEMPERATURE IN C. -0.9 0.9 5.5 12.6 15.9 23.2 24.7 24.4 20.7 14.6 11.0 7.1 13.3 AVERAGE OF MAXIMUM TEMPERATURE IN C. 4.7 7.5 13.1 21.6 25.2 32.5 34.5 33.7 29.8 23.3 19.1 13.7 21.6 DIFFERENCE BETWEEN AVERAGE MAXIMUM 5.6 6.6 7.6 9.0 9.3 9.3 9.8 9.3 9.1 8.7 8.1 6.6 8.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.22 3.41 3.99 5.07 6.32 7.75 10.16 8.94 6.98 5.59 4.65 4.58 5.89 MEAN OF MIXING RATIO AT 09 GMT. 3.40 3.36 3.72 4.69 5.61 6.80 10.36 7.99 6.62 5.49 4.97 4.91 5.66 MEAN OF MIXING RATIO AT 15 GMT. 3.47 3.33 3.82 4.63 5.58 6.67 10.10 7.68 6.81 5.38 5.07 5.05 5.63 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -6.4 -5.6 -2.8 3.8 8.6 18.4 20.4 17.5 16.6 7.5 8.0 2.0 -6.4 DAY 14 28 3 6 4 2 25 4 13 11 25 5 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 8.2 15.0 19.6 28.6 31.0 36.4 39.2 37.0 34.2 30.5 22.4 17.6 39.2 DAY 30 7 28 15 11 28 11 17 2 1 1 11 24 HOUR MAXIMUM PRECIPITATION IN MM. 22.0 18.0 32.0 21.0 7.0 0.0 2.0 16.0 2.0 4.0 1.0 41.0 41.0 DAY 6 12 30 6 4 ** 30 4 14 11 11 4 MONTHLY TOTAL PRECIPITATION IN MM. 66.3 58.4 77.6 44.7 31.1 0.0 2.4 17.6 3.0 4.8 1.4 61.3 368.6 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 54.9 20.6 6.2 18.3 NO. OF DAYS WITH PRECIPITATION. 9 9 12 8 10 0 2 3 3 2 2 4 64 NO. OF DAYS PRECIPITATION EQUAL 7 7 10 6 8 0 1 2 1 1 1 3 47 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 3 2 1 0 0 0 1 0 0 0 2 12 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 70 66 57 44 43 34 41 39 38 45 47 60 49 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 61 54 41 29 29 22 30 24 25 31 36 48 36 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 67 55 42 30 30 21 28 23 26 32 40 55 37 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 3 2 0 0 0 0 0 0 0 0 0 0 5 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 2 27 30 27 15 1 0 0 102 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 1 1 1 0 0 0 0 0 0 0 0 0 3 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 1 26 30 28 17 1 0 0 103 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 20 12 3 0 0 0 0 0 0 0 0 0 35 DATE OF START AND END FREEZING START = 3 JAN. END = 3 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 4.5 8.7 9.8 16.2 22.7 28.1 28.0 29.8 25.2 19.6 9.5 7.0 17.4 AVERAGE OF MINIMUM TEMPERATURE IN C. 1.4 4.9 6.0 11.7 17.6 23.0 23.2 25.1 20.6 15.2 6.2 3.9 13.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 7.6 12.5 13.6 20.7 27.8 33.2 32.9 34.5 29.9 24.0 12.8 10.2 21.6 DIFFERENCE BETWEEN AVERAGE MAXIMUM 6.2 7.6 7.6 9.0 10.2 10.2 9.7 9.4 9.3 8.8 6.6 6.3 8.4 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.99 3.41 3.68 5.62 6.19 6.98 9.39 8.04 6.56 5.64 4.77 4.15 5.70 MEAN OF MIXING RATIO AT 09 GMT. 3.82 3.44 3.83 5.70 6.29 6.94 8.74 7.50 7.13 6.01 5.10 4.27 5.73 MEAN OF MIXING RATIO AT 15 GMT. 3.75 3.35 3.70 5.10 5.80 6.26 8.11 7.35 6.71 5.61 4.81 4.41 5.41 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -2.5 -1.0 -0.4 5.2 11.2 20.0 17.0 21.6 12.5 7.0 -1.0 -1.0 -2.5 DAY 3 9 18 10 5 6 15 31 28 27 30 2 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 11.0 17.0 19.5 26.5 34.6 36.0 37.4 36.6 33.2 29.0 18.2 16.6 37.4 DAY 30 27 26 30 31 1 4 25 11 6 19 29 24 HOUR MAXIMUM PRECIPITATION IN MM. 14.0 7.0 15.4 3.0 1.0 0.0 5.0 0.0 0.2 11.4 22.0 8.0 22.0 DAY 10 8 21 24 10 ** 14 ** 27 27 11 10 MONTHLY TOTAL PRECIPITATION IN MM. 43.2 16.1 53.2 5.3 1.0 0.0 13.3 0.0 0.2 18.4 66.6 26.0 243.3 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 46.2 2.6 5.5 45.6 NO. OF DAYS WITH PRECIPITATION. 7 5 8 5 1 0 4 0 1 3 6 6 46 NO. OF DAYS PRECIPITATION EQUAL 6 4 6 2 1 0 3 0 0 3 5 5 35 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 0 2 0 0 0 0 0 0 1 4 0 9 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 75 52 53 51 38 31 44 33 37 43 66 68 49 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 56 38 41 37 27 22 29 21 28 33 53 53 37 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 59 39 40 34 25 19 25 21 26 33 56 62 37 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 8 26 24 31 19 0 0 0 108 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 8 29 25 31 19 0 0 0 112 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 10 2 2 0 0 0 0 0 0 0 2 3 19 DATE OF START AND END FREEZING START = 12 NOV. END = 19 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 4.3 5.6 9.5 19.3 24.2 27.5 29.3 29.6 26.2 16.7 9.2 5.6 17.2 AVERAGE OF MINIMUM TEMPERATURE IN C. 1.2 1.7 5.2 14.8 19.3 22.4 24.6 24.9 21.7 13.0 6.2 3.1 13.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 7.4 9.4 13.7 23.8 29.1 32.6 34.0 34.2 30.7 20.5 12.2 8.2 21.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 6.2 7.7 8.5 9.0 9.8 10.2 9.4 9.3 9.0 7.5 6.0 5.1 8.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.35 3.23 3.52 5.48 5.94 6.81 8.43 8.22 7.78 6.19 5.16 4.66 5.73 MEAN OF MIXING RATIO AT 09 GMT. 3.49 3.34 3.73 5.79 5.88 7.21 8.76 8.85 8.41 6.66 5.38 4.95 6.04 MEAN OF MIXING RATIO AT 15 GMT. 3.54 3.27 3.47 5.26 5.25 6.66 8.10 8.16 7.98 6.25 5.34 5.01 5.69 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -5.0 -3.0 -2.0 10.0 14.5 12.0 21.5 21.6 17.5 8.5 2.2 0.6 -5.0 DAY 18 8 3 1 2 13 27 12 30 4 11 16 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 16.2 16.2 19.0 28.4 33.0 37.5 37.4 38.0 35.4 25.5 19.8 11.0 38.0 DAY 1 24 30 20 26 30 11 3 8 11 3 22 24 HOUR MAXIMUM PRECIPITATION IN MM. 18.0 29.0 7.0 1.0 0.6 0.0 0.8 0.0 2.0 19.0 6.0 29.0 29.0 DAY 28 14 23 22 24 ** 13 ** 6 17 30 1 MONTHLY TOTAL PRECIPITATION IN MM. 45.1 43.5 17.6 1.6 0.6 0.0 0.8 0.0 2.8 48.5 23.3 83.4 267.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 39.7 0.8 1.3 58.1 NO. OF DAYS WITH PRECIPITATION. 10 5 4 3 1 0 1 0 2 9 12 10 57 NO. OF DAYS PRECIPITATION EQUAL 8 4 3 1 0 0 0 0 1 6 8 7 38 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 2 0 0 0 0 0 0 0 2 0 3 8 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 65 61 50 42 33 33 35 35 41 56 71 80 50 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 53 46 39 30 22 24 26 27 30 45 59 68 39 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 59 47 36 29 20 21 23 23 30 46 64 77 40 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 1 0 0 0 0 0 0 0 0 0 0 0 1 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 9 24 31 31 18 0 0 0 113 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 12 24 31 31 19 0 0 0 117 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 14 9 2 0 0 0 0 0 0 0 0 0 25 DATE OF START AND END FREEZING START = 9 JAN. END = 16 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE PERIOD 1961 TO 2000 PAGE 1 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPE. IN C. 2.7 4.6 9.1 15.1 20.7 26.2 29.3 28.6 24.3 17.8 10.7 5.3 16.2 SD OF MEAN DAILY TEMPERATURE IN C. 2.95 2.49 1.84 1.74 1.78 1.15 0.90 1.38 1.15 1.23 1.78 2.30 1.72 AVERAGE OF MINIMUM TEMPERATURE IN C. -1.1 0.5 4.7 10.2 15.4 20.7 24.0 23.4 19.0 12.9 6.3 1.4 11.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 6.5 8.8 13.6 20.0 25.8 31.6 34.5 33.7 29.5 22.6 15.0 9.2 20.9 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.5 8.4 8.9 9.8 10.4 11.0 10.5 10.3 10.5 9.8 8.7 7.8 9.5 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.18 3.18 3.96 5.27 6.53 7.08 8.12 7.37 5.51 5.00 4.18 3.51 5.23 MEAN OF MIXING RATIO AT 09 GMT. 3.56 3.41 4.06 5.21 6.23 6.76 8.22 7.80 6.04 5.16 4.31 3.83 5.38 MEAN OF MIXING RATIO AT 15 GMT. 3.46 3.38 4.00 5.03 5.89 6.40 8.18 7.84 6.14 5.24 4.34 3.85 5.31 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -15.5 -12.0 -6.0 -6.4 4.5 8.2 16.5 13.2 9.8 4.7 -7.0 -13.0 -15.5 YEAR - DAY 72-24 72- 2 92-11 67- 2 92- 5 67- 6 68-13 68-21 81-24 64-29 64-29 63-28 72-24 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 16.5 20.0 26.0 29.0 36.0 39.0 41.0 39.7 39.0 32.2 23.7 18.5 41.0 YEAR - DAY 63-29 73-19 70-31 82-27 65-18 72-24 95-16 69- 6 70- 9 70- 1 67- 1 69- 5 95-16 24 HOUR MAXIMUM PRECIPITATION IN MM. 39.0 37.0 60.0 50.4 22.5 14.0 5.0 16.0 8.0 23.0 37.0 41.0 60.0 YEAR - DAY 69-23 94- 1 96- 2 62-21 68-30 96-28 99-14 98- 4 66-30 94- 4 94-26 98- 4 96- 2 MONTHLY TOTAL PRECIPITATION IN MM. 35.7 33.5 46.6 30.1 15.5 3.1 1.2 2.5 1.0 10.7 26.4 31.4 237.7 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 48.8 20.4 1.9 28.8 NO. OF DAYS WITH PRECIPITATION. 6 6 7 6 5 1 1 1 1 3 4 5 46 NO. OF DAYS PRECIPITATION EQUAL 6 4 6 4 4 1 0 1 0 2 3 4 35 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 2 1 0 0 0 0 0 0 1 1 7 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 69 63 58 52 44 34 33 32 32 44 56 65 49 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 58 49 42 36 30 23 24 24 23 30 40 51 36 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 65 54 45 38 31 23 24 25 26 36 47 61 40 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 7 4 0 0 0 0 0 0 0 0 0 3 14 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 2 16 28 26 9 0 0 0 81 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 2 1 0 0 0 0 0 0 0 0 0 0 3 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 4 23 30 29 14 0 0 0 100 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 18 13 4 0 0 0 0 0 0 0 2 10 47 DATE OF START AND END FREEZING START = 7 NOV. END = 14 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION JEOPHYSIC-TEHRAN LATITUDE 35 44 N DATA PROCESSING CENTER LONGITUDE 51 23 E ELEVATION 1360 MET. MEAN AND EXTREMES FOR THE PERIOD 1961 TO 2000 PAGE 2 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE DRY BULB TEMPERATURE. IN C. 2.4 4.6 9.3 15.5 21.5 27.4 30.3 29.3 24.7 17.9 10.5 5.0 16.5 AVERAGE DEW POINT TEMPERATURE. IN C. -4.5 -4.6 -2.8 0.7 2.6 4.2 7.3 6.1 2.6 0.6 -1.5 -3.1 0.6 AVERAGE OF MIXING RATIO IN G/KG 3.40 3.32 4.00 5.17 5.80 6.74 8.12 7.67 5.91 4.94 4.27 3.73 5.26 AVERAGE OF VAPOUR PRESSURE HPA 4.66 4.56 5.49 7.11 8.00 9.28 11.19 10.56 8.15 6.81 5.87 5.13 7.23 AVERAGE OF SATURATION DEFICIT IN HPA 2.97 4.34 6.81 11.24 18.56 28.16 32.73 31.00 23.91 14.41 7.37 4.00 15.46 AVERAGE RELATIVE HUMIDITY IN PERCENT 64 56 48 42 33 27 27 27 27 35 48 59 41 AVERAGE OF MAXIMUM RELATIVE HUMIDITY(%) 75 68 61 55 44 35 34 33 34 44 58 70 51 AVERAGE OF MINIMUM RELATIVE HUMIDITY(%) 53 45 38 32 25 20 21 21 22 27 38 48 33 NO. OF DAYS PRECIPITATION EQUAL 3 2 3 2 1 0 0 0 0 1 2 2 16 OR MORE THAN 5 MM.