IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 1 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. AVERAGE OF MEAN DAILY TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. 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AVERAGE OF MINIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 ****** ****** ****** 7.0 13.2 17.2 22.7 21.8 16.7 ****** ****** ****** ****** 1965 ****** ****** ****** ****** 13.3 14.5 16.2 15.8 13.3 10.0 5.0 1.8 ****** 1966 1.2 1.8 4.7 8.8 11.5 15.3 11.1 17.8 14.5 10.4 7.8 3.9 9.1 1967 2.5 ****** 7.0 8.2 11.5 17.1 20.8 22.2 14.4 8.1 5.9 -4.8 ****** 1968 -3.6 ****** -6.7 6.5 11.7 13.4 17.1 15.8 13.8 11.9 6.3 -5.3 ****** 1969 ****** ****** 9.4 9.1 13.1 15.5 16.6 15.7 15.0 13.4 ****** 5.7 ****** 1970 -0.9 3.2 4.0 9.8 12.7 18.0 20.3 20.3 14.5 11.1 6.3 -0.3 9.9 1971 -1.5 2.3 6.3 7.0 13.7 18.3 17.2 10.1 13.7 6.5 4.2 -0.4 8.1 1972 -8.9 -6.6 -0.4 5.8 8.5 11.3 10.3 7.3 5.6 4.7 0.2 ****** ****** 1973 ****** -0.1 0.6 3.0 5.5 12.1 15.1 12.8 9.5 5.2 -0.7 -4.9 ****** 1974 -8.8 -7.0 1.9 3.6 7.3 10.5 10.6 10.0 8.3 3.4 0.2 -5.4 2.9 1975 -7.3 -5.1 -1.5 4.0 7.4 14.5 8.7 16.1 11.0 2.7 -0.8 -5.0 3.7 1976 -6.1 -6.6 -3.0 4.7 8.5 13.0 15.3 13.4 10.6 5.0 -0.3 -2.5 4.3 1977 -8.3 -2.9 2.6 3.9 6.7 13.2 13.5 13.0 9.8 4.9 -0.1 -3.3 4.4 1978 -4.8 -3.1 0.7 3.8 9.0 10.9 12.1 11.5 10.5 7.1 -1.7 -0.7 4.6 1979 -1.9 -1.4 0.1 7.8 9.0 14.4 17.3 13.3 10.8 7.9 0.3 -2.9 6.2 1980 -3.9 -3.2 1.5 8.2 9.9 14.1 13.9 15.3 11.0 7.0 2.8 -3.1 6.1 1981 -4.0 -2.9 2.0 6.2 9.4 13.8 17.3 15.4 10.9 6.3 2.1 -0.6 6.3 1982 -4.2 -5.3 -0.1 8.0 12.2 15.9 17.2 ****** 13.4 ****** ****** ****** ****** 1983 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** 21.0 17.0 7.9 5.6 0.4 ****** 1988 -2.3 -1.3 4.0 8.6 15.4 19.4 21.7 21.4 17.4 11.7 5.9 2.3 10.4 1989 -5.2 -4.5 4.4 10.8 15.2 21.7 23.6 22.6 18.3 13.4 6.0 2.1 10.7 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 -1.4 -2.4 3.6 10.8 14.0 19.2 22.3 22.0 17.6 ****** ****** ****** ****** 1992 -5.6 -2.8 -0.5 8.1 11.0 18.8 23.7 19.6 16.3 11.1 6.3 -0.4 8.8 1993 -3.9 -0.8 2.4 9.7 13.5 19.6 21.5 20.7 18.9 9.8 3.8 1.4 9.7 1994 0.2 -0.9 5.0 10.7 14.4 19.7 23.3 23.3 15.5 10.9 7.0 -2.1 10.6 1995 0.4 0.9 4.2 9.8 13.9 18.4 24.6 23.9 17.7 10.6 6.0 -1.5 10.7 1996 -4.5 0.8 2.1 8.5 15.0 19.8 21.5 22.1 19.9 10.9 3.9 1.9 10.2 1997 0.1 -2.0 1.7 9.4 14.3 20.7 24.7 23.4 17.6 13.9 5.1 0.9 10.8 1998 -2.8 -1.0 3.7 10.6 14.3 20.5 23.2 22.6 18.8 11.8 8.7 4.7 11.3 1999 -1.1 2.7 4.1 9.9 16.1 21.2 21.7 23.0 18.5 14.0 4.7 1.4 11.3 2000 -1.4 -0.6 3.8 12.8 17.2 20.1 22.3 22.4 19.4 10.9 3.8 1.0 11.0 MEAN -3.3 -1.9 2.3 7.8 11.9 16.5 18.3 17.9 14.4 9.0 3.7 -0.6 8.0 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 3 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. AVERAGE OF MAXIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 ****** ****** ****** 20.6 ****** ****** 37.8 36.7 32.1 ****** ****** ****** ****** 1965 ****** ****** ****** ****** 27.5 30.2 32.6 33.1 ****** ****** 17.1 11.7 ****** 1966 12.7 9.8 17.0 18.7 25.2 34.0 31.9 35.6 29.6 22.4 17.0 13.2 22.3 1967 7.8 9.4 17.0 18.2 26.1 29.5 33.6 35.4 ****** 25.9 18.2 ****** ****** 1968 8.4 ****** 14.6 20.9 26.2 29.0 35.1 32.8 31.0 23.5 13.5 10.8 ****** 1969 ****** ****** 19.3 ****** ****** ****** ****** ****** ****** ****** ****** 13.2 ****** 1970 6.7 12.1 13.8 23.3 28.0 32.3 34.2 35.0 27.8 23.5 17.3 8.7 21.9 1971 7.3 10.5 14.6 18.6 27.6 32.7 34.3 34.0 28.7 22.4 14.6 8.9 21.2 1972 2.8 3.3 12.2 22.6 23.6 32.3 34.9 32.1 31.2 25.7 15.5 ****** ****** 1973 ****** 15.3 16.6 23.4 27.6 32.7 35.2 34.3 32.3 27.6 16.7 11.1 ****** 1974 3.3 5.2 15.7 21.3 27.2 31.7 31.9 31.9 28.9 22.4 18.2 7.5 20.4 1975 6.3 10.2 16.6 22.0 26.5 31.8 35.3 33.1 31.1 24.0 14.3 7.3 21.5 1976 9.8 7.8 12.1 19.5 27.1 30.6 32.3 32.0 30.4 22.9 13.8 10.5 20.7 1977 4.2 14.4 21.0 20.4 26.9 32.8 34.8 33.7 30.7 21.9 15.7 10.5 22.3 1978 10.1 13.3 17.2 24.1 27.0 30.5 33.2 34.0 32.0 25.1 12.6 13.4 22.7 1979 11.5 13.3 14.4 24.0 23.4 29.8 35.0 32.1 29.8 25.4 18.2 10.4 22.3 1980 9.3 8.7 16.3 23.8 27.1 31.4 33.7 33.3 30.2 23.1 17.1 12.8 22.2 1981 10.1 11.7 18.8 21.9 27.6 30.9 34.2 34.3 31.1 23.1 19.6 15.5 23.2 1982 10.0 8.9 14.5 24.7 28.2 34.2 35.9 ****** 31.3 ****** ****** ****** ****** 1983 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** 32.3 28.1 17.1 15.0 9.6 ****** 1988 5.7 6.8 14.3 19.4 26.7 31.0 33.6 32.0 28.3 22.1 16.1 10.9 20.6 1989 2.6 4.0 13.2 20.5 25.1 32.9 34.0 33.2 28.5 22.9 13.7 9.2 20.0 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 4.8 4.8 10.8 20.6 24.1 30.0 33.5 32.8 28.4 ****** ****** ****** ****** 1992 2.4 7.0 8.3 17.7 20.0 28.9 33.7 29.7 26.0 20.6 14.9 5.8 17.9 1993 2.6 7.4 11.2 19.2 23.7 30.5 32.3 31.8 29.5 19.2 11.9 9.9 19.1 1994 8.1 8.6 14.0 20.4 24.7 31.1 34.4 34.5 25.3 18.8 15.5 6.0 20.1 1995 9.3 9.4 14.2 18.7 23.6 29.1 34.9 34.8 28.2 20.6 16.0 5.0 20.3 1996 3.1 8.6 9.6 18.8 24.8 30.6 31.3 32.1 29.7 21.0 11.8 10.6 19.3 1997 8.5 8.2 10.7 19.5 24.5 30.0 35.4 34.5 27.9 22.7 11.8 7.5 20.1 1998 4.2 7.1 13.2 21.2 25.1 31.6 33.5 32.5 28.6 21.3 17.8 13.3 20.8 1999 5.6 12.2 12.3 19.9 27.4 32.4 31.8 33.0 28.6 22.9 12.6 9.3 20.7 2000 7.0 8.8 13.8 23.5 28.9 31.9 32.9 33.0 29.4 19.8 9.9 7.7 20.5 MEAN 6.8 9.1 14.4 20.9 25.9 31.3 33.9 33.3 29.5 22.5 15.2 10.0 21.1 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 4 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 ****** ****** ****** 13.6 ****** ****** 15.1 14.9 15.4 ****** ****** ****** ****** 1965 ****** ****** ****** ****** 14.2 15.7 16.4 17.3 ****** ****** 12.1 9.9 ****** 1966 11.5 8.0 12.3 9.9 13.7 18.7 20.8 17.8 15.1 12.0 9.2 9.3 13.2 1967 5.3 ****** 10.0 10.0 14.6 12.4 12.8 13.2 ****** 17.8 12.3 ****** ****** 1968 12.0 ****** 21.3 14.4 14.5 15.6 18.0 17.0 17.2 11.6 7.2 16.1 ****** 1969 ****** ****** 9.9 ****** ****** ****** ****** ****** ****** ****** ****** 7.5 ****** 1970 7.6 8.9 9.8 13.5 15.3 14.3 13.9 14.7 13.3 12.4 11.1 9.0 12.0 1971 8.8 8.2 8.3 11.6 13.9 14.5 17.1 23.9 15.0 15.9 10.4 9.3 13.1 1972 11.7 9.9 12.6 16.8 15.1 21.0 24.6 24.8 25.6 21.0 15.3 ****** ****** 1973 ****** 15.3 16.0 20.4 22.1 20.6 20.1 21.5 22.8 22.4 17.4 16.0 ****** 1974 12.1 12.2 13.8 17.7 19.9 21.2 21.3 21.9 20.6 19.0 18.0 12.9 17.5 1975 13.6 15.3 18.1 18.0 19.1 17.3 26.6 17.0 20.1 21.3 15.1 12.3 17.8 1976 15.9 14.4 15.1 14.8 18.6 17.6 17.0 18.6 19.8 17.9 14.1 13.0 16.4 1977 12.5 17.3 18.4 16.5 20.2 19.6 21.3 20.7 20.9 17.0 15.8 13.8 17.8 1978 14.9 16.4 16.5 20.3 18.0 19.6 21.1 22.5 21.5 18.0 14.3 14.1 18.1 1979 13.4 14.7 14.3 16.2 14.4 15.3 17.7 18.8 19.0 17.5 17.9 13.3 16.0 1980 13.2 11.9 14.8 15.6 17.2 17.3 19.8 18.0 19.2 16.1 14.3 15.9 16.1 1981 14.1 14.6 16.8 15.7 18.2 17.1 16.9 18.9 20.2 16.8 17.5 16.1 16.9 1982 14.2 14.2 14.6 16.7 16.0 18.3 18.7 ****** 17.9 ****** ****** ****** ****** 1983 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** 11.3 11.1 9.2 9.4 9.2 ****** 1988 8.0 8.1 10.3 10.8 11.3 11.6 11.9 10.6 10.9 10.4 10.2 8.6 10.2 1989 7.8 8.5 8.8 9.8 9.9 11.2 10.4 10.6 10.2 9.5 7.7 7.1 9.3 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 6.2 7.1 7.2 9.8 10.1 10.8 11.2 10.8 10.8 ****** ****** ****** ****** 1992 8.0 9.8 8.8 9.6 9.0 10.1 10.0 10.1 9.7 9.5 8.6 6.2 9.1 1993 6.5 8.2 8.8 9.5 10.2 10.9 10.8 11.1 10.6 9.4 8.1 8.5 9.4 1994 7.9 9.5 9.0 9.7 10.3 11.4 11.1 11.2 9.8 7.9 8.5 8.1 9.5 1995 8.9 8.5 10.0 8.9 9.7 10.7 10.3 10.9 10.5 10.0 10.0 6.5 9.6 1996 7.6 7.8 7.5 10.3 9.8 10.8 9.8 10.0 9.8 10.1 7.9 8.7 9.2 1997 8.4 10.2 9.0 10.1 10.2 9.3 10.7 11.1 10.3 8.8 6.7 6.6 9.3 1998 7.0 8.1 9.5 10.6 10.8 11.1 10.3 9.9 9.8 9.5 9.1 8.6 9.5 1999 6.7 9.5 8.2 10.0 11.3 11.2 10.1 10.0 10.1 8.9 7.9 7.9 9.3 2000 8.4 9.4 10.0 10.7 11.7 11.8 10.6 10.6 10.0 8.9 6.1 6.7 9.6 MEAN 10.1 11.0 12.1 13.2 14.1 14.7 15.5 15.3 15.1 13.7 11.5 10.4 13.1 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 5 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 03 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 ****** ****** ****** 4.28 5.89 6.14 9.13 15.40 16.31 ****** ****** ****** ****** 1965 ****** ****** ****** ****** 7.87 6.65 7.57 8.19 7.38 7.14 4.42 4.35 ****** 1966 3.58 4.25 4.39 4.70 5.60 7.05 6.20 8.28 6.48 6.45 5.21 3.64 5.49 1967 4.65 3.85 4.27 5.07 5.83 7.20 11.58 10.53 8.15 5.80 6.23 2.34 6.29 1968 2.58 ****** 1.29 5.52 7.74 8.30 7.92 7.85 7.16 6.07 4.93 2.61 ****** 1969 2.88 3.62 4.99 5.20 6.83 6.89 6.24 7.76 7.51 8.45 4.93 5.08 5.86 1970 3.52 4.33 4.78 5.21 7.74 6.61 9.85 8.88 8.64 6.92 4.73 3.63 6.24 1971 3.97 4.50 5.58 5.30 7.65 8.29 8.45 7.62 8.06 6.41 5.09 3.63 6.21 1972 2.03 2.64 4.43 6.37 8.08 9.61 10.37 8.41 7.64 5.84 4.40 ****** ****** 1973 ****** 4.37 4.45 4.99 7.49 9.82 11.34 7.71 8.08 5.16 3.71 2.39 ****** 1974 2.26 2.75 5.20 5.29 7.71 9.95 11.67 9.77 7.43 4.58 3.58 2.82 6.08 1975 2.34 2.91 3.49 5.93 7.29 7.96 8.18 7.57 6.45 4.53 3.68 2.82 5.26 1976 2.90 2.74 3.65 6.06 7.67 8.54 8.57 7.83 7.53 5.60 3.96 3.53 5.72 1977 2.34 3.40 4.82 5.20 6.69 7.29 6.54 7.42 6.34 5.52 4.17 3.37 5.26 1978 2.91 3.41 4.22 4.86 6.08 7.53 7.55 7.76 6.62 4.93 3.56 3.69 5.26 1979 3.50 3.59 4.11 6.29 6.68 8.04 6.98 6.89 5.60 5.40 3.73 3.25 5.34 1980 3.03 3.29 4.13 5.84 6.66 6.74 7.70 7.62 5.89 4.86 4.52 3.07 5.28 1981 3.12 3.43 4.11 4.52 5.19 5.99 6.77 6.76 5.36 4.98 3.94 3.29 4.79 1982 3.05 2.71 3.68 5.55 5.92 7.22 7.10 ****** 5.51 ****** ****** ****** ****** 1983 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** 7.51 6.29 5.45 3.98 3.83 ****** 1988 2.83 3.08 3.77 4.94 5.03 5.36 6.62 6.02 4.73 4.80 3.49 2.93 4.47 1989 2.24 2.16 4.10 4.55 5.77 6.19 6.77 5.98 4.91 4.39 4.43 3.39 4.57 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.31 3.01 4.53 4.50 4.95 5.63 6.76 6.39 5.42 ****** ****** ****** ****** 1992 2.30 2.17 3.17 4.59 6.66 6.97 7.01 6.93 4.90 4.05 3.85 3.49 4.67 1993 2.70 3.48 3.30 5.00 5.95 5.30 6.95 5.90 4.27 3.43 4.06 3.18 4.46 1994 3.10 2.77 3.77 4.87 5.29 5.12 7.05 5.57 4.10 5.89 4.38 2.39 4.52 1995 2.76 3.17 3.25 5.47 6.57 7.17 7.59 4.72 5.06 4.04 2.91 3.02 4.64 1996 2.67 4.00 4.23 5.76 8.25 7.12 7.27 6.37 5.09 4.58 3.51 2.89 5.15 1997 2.67 1.85 3.30 4.12 5.59 6.89 7.66 5.32 4.85 5.13 4.31 3.65 4.61 1998 3.13 3.46 4.07 4.94 6.65 5.66 6.89 6.56 4.93 4.04 2.75 3.04 4.68 1999 3.43 2.96 3.28 4.77 4.48 4.71 6.69 5.81 4.87 3.76 4.10 3.08 4.33 2000 2.28 2.62 2.85 4.29 4.96 5.33 5.94 5.18 5.34 5.32 4.61 3.88 4.38 MEAN 2.94 3.24 3.98 5.14 6.48 7.01 7.84 7.44 6.47 5.30 4.18 3.30 5.27 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 6 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 09 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 ****** ****** ****** 4.18 4.91 5.24 7.78 13.68 18.25 ****** ****** ****** ****** 1965 ****** ****** ****** ****** 7.50 6.29 7.90 7.12 6.27 7.10 4.52 3.69 ****** 1966 3.86 3.94 4.50 4.50 5.02 9.11 7.08 13.51 7.30 6.71 5.29 4.52 6.28 1967 4.76 4.42 4.24 5.38 5.76 5.46 14.05 17.25 11.98 8.48 7.25 ****** ****** 1968 4.15 ****** 5.71 5.24 6.35 8.25 9.58 10.45 7.91 6.44 5.63 4.56 ****** 1969 4.15 5.11 5.06 6.08 7.06 7.76 6.85 7.60 8.06 8.15 4.29 5.25 6.28 1970 4.57 5.12 4.90 6.18 7.70 7.35 10.39 9.78 8.08 8.72 4.62 4.54 6.83 1971 4.37 3.93 6.87 5.99 8.44 8.70 8.81 8.16 9.34 7.32 6.16 4.87 6.91 1972 3.53 3.64 5.48 6.88 8.19 10.29 12.06 10.60 8.47 6.45 5.55 ****** ****** 1973 ****** 5.27 5.94 5.84 7.61 9.12 11.00 10.27 8.58 6.22 4.67 4.22 ****** 1974 3.02 4.08 6.57 5.62 7.90 10.75 11.95 10.54 9.36 7.05 5.81 4.49 7.26 1975 3.98 4.54 4.69 7.47 8.29 9.42 7.39 10.77 8.59 7.49 5.55 4.51 6.89 1976 4.80 4.16 5.05 7.07 7.58 9.91 6.72 7.44 9.37 7.96 5.87 5.17 6.76 1977 3.58 4.75 5.91 5.28 8.07 7.85 6.00 7.20 8.67 6.56 5.38 4.47 6.14 1978 4.06 4.11 4.72 5.65 6.63 7.42 7.13 7.26 6.67 6.67 4.25 4.90 5.79 1979 4.16 4.71 4.48 7.03 5.35 6.08 8.06 6.23 8.36 7.23 4.65 4.52 5.90 1980 3.96 3.91 5.00 4.92 5.27 6.98 6.97 7.02 7.41 5.75 6.07 4.95 5.68 1981 4.40 4.26 5.12 4.90 6.07 7.16 7.70 7.27 7.11 5.35 4.78 4.71 5.73 1982 3.72 3.23 4.03 5.83 6.39 7.36 7.81 ****** 6.47 ****** ****** ****** ****** 1983 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** 6.93 5.26 5.10 3.59 3.58 ****** 1988 3.29 3.44 4.00 4.81 4.26 4.32 6.12 5.72 4.81 4.71 3.29 2.90 4.31 1989 2.23 2.27 4.26 4.37 5.21 5.54 6.29 5.72 5.36 4.51 4.55 3.71 4.50 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.91 3.30 4.71 4.05 4.50 5.14 6.56 6.52 5.96 ****** ****** ****** ****** 1992 2.63 3.04 3.42 4.86 6.81 6.51 6.20 6.88 5.43 4.69 4.06 3.80 4.86 1993 3.21 3.92 3.46 5.01 5.69 4.66 5.73 5.07 3.75 3.23 4.11 3.59 4.29 1994 3.64 3.06 3.79 4.36 4.75 4.62 6.31 5.17 3.57 5.97 4.47 2.65 4.36 1995 3.16 3.43 3.13 5.16 6.13 6.47 7.55 4.59 5.68 4.17 3.35 3.62 4.70 1996 3.18 4.76 4.66 6.12 8.54 7.20 6.39 6.12 5.90 5.16 3.64 3.27 5.41 1997 3.16 2.16 3.54 3.95 5.64 7.06 7.91 5.18 5.47 5.36 4.39 4.24 4.84 1998 3.61 3.63 4.12 5.03 6.66 5.02 6.24 5.93 4.81 4.58 3.41 3.47 4.71 1999 3.85 3.14 3.60 5.22 4.08 4.04 6.17 5.57 5.36 4.07 4.49 3.50 4.42 2000 2.90 2.79 2.68 4.56 5.53 5.32 5.60 4.95 5.80 6.04 5.02 4.73 4.66 MEAN 3.71 3.87 4.61 5.39 6.39 6.99 7.82 7.96 7.30 6.12 4.79 4.17 5.75 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 7 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 15 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 ****** ****** ****** 4.27 4.18 4.36 11.43 13.15 17.15 ****** ****** ****** ****** 1965 ****** ****** ****** ****** 7.09 4.63 6.41 7.79 5.91 6.60 4.98 4.54 ****** 1966 4.66 4.15 4.95 6.41 6.05 9.55 5.80 14.62 5.76 6.79 5.46 3.72 6.49 1967 4.24 4.89 4.74 4.95 6.56 8.70 15.66 11.91 5.96 7.23 6.51 2.19 6.96 1968 4.74 ****** 5.38 7.89 7.43 8.32 8.78 11.31 10.77 6.29 5.52 5.04 ****** 1969 4.12 4.84 4.95 6.57 7.36 6.26 6.86 7.56 9.63 7.82 5.27 5.01 6.35 1970 4.56 4.87 5.01 7.42 8.18 7.22 10.07 8.66 9.28 7.69 5.64 4.30 6.91 1971 4.19 4.61 6.38 5.95 7.97 8.65 9.28 8.42 9.58 6.98 6.11 3.91 6.83 1972 3.00 2.87 5.16 6.25 8.19 9.30 10.53 9.50 8.81 6.36 5.14 ****** ****** 1973 ****** 4.61 4.71 5.40 6.74 7.92 9.13 7.45 7.23 5.75 4.70 3.17 ****** 1974 2.40 2.84 5.66 5.55 7.24 9.20 8.73 8.86 7.88 5.74 4.68 3.57 6.03 1975 2.96 4.02 4.53 6.55 7.38 8.48 8.89 7.81 6.68 5.93 4.40 3.86 5.96 1976 4.11 3.81 4.51 5.95 5.94 8.97 7.33 7.06 8.21 6.04 5.08 4.49 5.96 1977 3.25 4.38 5.38 5.09 6.37 7.61 6.53 7.16 6.61 5.17 4.97 4.13 5.55 1978 3.52 3.97 4.65 4.81 6.01 7.38 6.93 6.41 5.07 4.98 3.89 4.05 5.14 1979 4.20 4.26 4.14 6.07 5.14 7.07 6.46 5.07 6.18 5.25 3.95 3.61 5.12 1980 3.60 3.12 4.31 5.17 4.68 6.65 6.30 5.44 6.28 5.01 4.63 3.93 4.93 1981 3.77 3.63 4.39 4.42 5.41 6.36 6.52 6.44 5.73 4.36 3.88 3.39 4.86 1982 2.88 2.77 3.40 5.36 5.70 7.02 7.54 ****** 5.85 ****** ****** ****** ****** 1983 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** 6.63 5.34 5.53 3.75 3.72 ****** 1988 3.24 3.67 3.97 4.96 4.46 4.15 5.71 5.22 5.00 5.17 3.15 2.79 4.29 1989 2.34 2.40 4.51 4.53 5.14 5.52 6.12 5.32 4.79 4.65 4.68 4.11 4.51 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.93 3.35 5.09 4.24 4.83 4.95 6.45 6.13 5.72 ****** ****** ****** ****** 1992 2.82 2.58 3.50 5.12 7.07 6.49 6.20 6.82 5.46 4.86 4.37 3.94 4.94 1993 3.24 3.99 3.65 5.30 5.81 4.65 5.57 4.99 4.25 3.77 4.36 3.82 4.45 1994 3.88 3.23 4.12 4.97 5.23 4.50 6.23 5.10 3.81 6.68 4.92 2.95 4.64 1995 3.41 3.56 3.36 5.78 6.20 6.44 7.25 4.51 5.62 4.54 3.24 3.71 4.80 1996 3.19 4.64 5.06 6.60 8.78 7.12 6.21 5.95 6.23 5.02 3.67 3.48 5.50 1997 3.10 2.06 3.49 4.38 5.66 7.45 8.11 5.15 5.61 5.85 4.76 4.41 5.00 1998 3.56 3.85 4.52 5.54 6.88 4.89 5.97 5.89 5.46 4.91 3.44 3.55 4.87 1999 3.77 3.15 3.73 5.35 4.36 3.69 6.03 5.79 5.71 4.42 4.70 3.91 4.55 2000 2.89 2.90 2.76 4.82 5.71 5.29 5.32 5.07 5.98 6.29 5.12 4.65 4.73 MEAN 3.56 3.69 4.49 5.53 6.25 6.74 7.56 7.33 6.80 5.72 4.66 3.86 5.51 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 8 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 1964 ***** ** ***** ** ***** ** 1.6 15 7.6 3 12.1 21 15.0 3 14.2 14 8.2 18 ***** ** ***** ** ***** ** ***** 1965 ***** ** ***** ** ***** ** ***** ** 6.2 2 11.2 21 14.0 1 13.0 11 10.2 18 8.3 25 1.0 25 -5.0 13 ***** 1966 -0.2 8 -0.3 1 -0.8 6 5.0 1 7.0 5 10.5 6 7.8 11 14.0 29 9.5 9 7.0 24 3.8 29 1.0 25 -0.8 1967 1.0 5 ***** ** -1.0 12 -3.0 1 6.2 1 13.5 1 16.5 21 17.0 1 10.0 27 3.0 23 2.0 15 -7.5 19 ***** 1968 -6.5 15 ***** ** -11.0 15 -12.5 8 9.0 1 10.5 2 16.0 12 13.0 15 10.0 19 7.0 30 3.0 23 -7.5 1 ***** 1969 ***** ** ***** ** 7.2 24 2.0 11 10.4 8 13.0 1 14.0 31 11.0 31 12.0 27 9.5 31 ***** ** -2.0 30 ***** 1970 -5.5 28 -2.0 1 1.5 8 5.0 26 8.5 1 10.0 14 17.5 6 17.0 31 9.0 20 7.5 10 3.5 14 -5.0 16 -5.5 1971 -6.5 20 -3.0 14 3.0 3 2.5 5 9.5 2 14.0 5 8.5 26 8.0 3 8.2 25 4.0 26 -2.0 14 -7.0 21 -7.0 1972 -14.5 25 -17.5 4 -7.0 5 2.0 4 4.5 7 8.5 1 8.5 1 4.5 29 3.5 23 4.0 12 -5.0 11 ***** ** ***** 1973 ***** ** -10.0 6 -6.0 10 1.0 7 3.0 11 6.0 1 10.5 1 8.5 12 4.0 28 2.0 2 -7.0 26 -12.0 28 ***** 1974 -18.0 14 -15.0 4 -4.5 6 -1.0 1 4.5 15 7.5 7 8.0 21 6.0 19 5.0 27 1.0 15 -6.0 28 -13.5 29 -18.0 1975 -15.0 21 -12.0 12 -7.0 4 0.0 3 3.5 8 9.0 6 7.5 3 11.4 28 7.0 28 -2.5 28 -6.5 8 -12.0 5 -15.0 1976 -12.0 12 -17.0 17 -13.0 2 1.0 6 5.5 8 10.0 9 10.0 2 12.0 16 9.0 9 3.0 25 -6.0 20 -6.5 1 -17.0 1977 -15.0 8 -9.5 2 -2.5 6 0.0 1 3.0 15 9.5 1 11.0 31 10.5 22 5.0 21 -3.0 24 -5.0 15 -9.5 26 -15.0 1978 -13.5 15 -8.0 7 -5.0 15 -0.5 16 2.0 4 6.5 5 9.0 8 9.0 15 7.0 9 5.0 16 -6.0 20 -5.5 26 -13.5 1979 -9.5 13 -5.0 5 -9.0 5 0.0 30 1.5 1 11.0 2 15.0 6 11.0 31 7.0 27 5.0 30 -5.0 21 -8.5 24 -9.5 1980 -8.5 8 -10.5 1 -6.5 6 1.5 17 4.5 1 11.0 1 11.5 2 12.5 28 7.0 25 2.5 31 -3.5 26 -8.0 21 -10.5 1981 -8.5 4 -8.0 4 -5.0 5 -3.0 2 6.0 3 10.0 1 12.0 31 12.0 1 4.0 25 2.5 31 -3.5 24 -3.0 3 -8.5 1982 -10.0 21 -10.0 19 -4.0 8 2.0 1 9.0 1 12.0 3 14.5 21 ***** ** 10.0 21 ***** ** ***** ** ***** ** ***** 1983 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1984 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1985 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1986 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1987 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** 16.0 29 12.5 30 2.0 12 -3.5 29 -5.5 1 ***** 1988 -6.0 1 -6.5 7 -3.0 6 1.0 2 10.0 7 16.0 28 15.5 28 17.0 26 10.5 30 8.5 2 -2.5 15 -6.5 30 -6.5 1989 -11.5 31 -12.5 4 -3.5 30 2.0 1 6.5 1 15.0 8 18.5 26 18.5 19 11.0 22 7.5 23 2.0 22 -1.6 8 -12.5 1990 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1991 -5.0 28 -11.0 13 -3.0 11 4.0 14 6.5 25 16.5 1 18.0 12 18.5 28 8.5 27 ***** ** ***** ** ***** ** ***** 1992 -14.0 26 -6.5 27 -8.0 12 2.0 1 2.5 5 15.0 9 19.0 12 14.0 31 10.0 30 7.0 8 -6.0 27 -8.5 29 -14.0 1993 -9.0 21 -9.0 6 -4.0 23 6.0 14 7.0 1 15.0 5 19.0 31 17.0 3 13.5 28 5.0 8 -4.5 30 -3.2 1 -9.0 1994 -6.0 25 -8.5 19 0.0 15 2.0 5 8.0 7 12.0 5 18.0 1 19.4 26 8.4 20 8.0 30 1.4 10 -11.6 7 -11.6 1995 -4.0 21 -3.0 26 -1.0 6 4.4 7 7.6 9 10.0 1 21.0 1 20.0 10 9.0 22 5.2 18 -4.2 29 -6.0 21 -6.0 1996 -13.4 16 -5.6 6 -2.0 1 -0.4 5 10.4 13 15.6 28 16.6 15 18.2 4 15.0 24 5.4 17 -2.0 13 -3.6 3 -13.4 1997 -8.2 29 -9.8 7 -5.6 9 -2.0 12 7.0 6 16.5 20 21.0 7 19.0 29 11.4 15 7.0 25 0.8 28 -4.0 29 -9.8 1998 -7.4 14 -8.2 17 -5.8 2 2.8 6 6.8 3 15.0 3 18.0 25 18.0 4 14.4 12 4.0 10 4.0 25 1.0 5 -8.2 1999 -7.6 3 -2.0 22 -3.0 19 4.6 9 10.6 21 17.2 17 16.0 28 20.4 20 12.4 28 5.8 27 -4.2 30 -3.4 1 -7.6 2000 -7.4 18 -6.2 9 -3.4 4 7.6 2 12.6 2 11.4 14 18.8 20 15.5 20 15.0 25 6.0 5 0.0 19 -2.0 27 -7.4 LOW. -18.0 14 -17.5 4 -13.0 2 -12.5 8 1.5 1 6.0 1 7.5 3 4.5 29 3.5 23 -3.0 24 -7.0 26 -13.5 29 -18.0 YEAR 1974 1972 1976 1968 1979 1973 1975 1972 1972 1977 1973 1974 1974 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 9 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 1964 ***** ** ***** ** ***** ** 26.6 28 ***** ** ***** ** 39.6 13 42.5 21 42.2 1 ***** ** ***** ** ***** ** ***** 1965 ***** ** ***** ** ***** ** ***** ** 35.0 27 34.1 11 35.0 15 36.0 16 ***** ** ***** ** 20.8 1 20.0 1 ***** 1966 15.3 19 15.4 27 21.0 9 25.6 20 32.0 24 37.0 14 38.0 30 38.2 22 34.0 11 26.4 8 20.2 1 18.0 4 38.2 1967 10.5 31 15.1 2 22.4 27 25.0 23 32.5 29 33.0 30 37.0 31 38.0 9 ***** ** 29.0 3 24.5 3 ***** ** ***** 1968 12.0 1 ***** ** 18.5 10 29.1 20 30.0 21 36.0 30 38.0 2 36.2 17 33.5 4 28.0 1 17.0 3 15.0 1 ***** 1969 ***** ** ***** ** 28.0 15 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** 17.5 1 ***** 1970 11.5 1 18.0 19 23.0 30 27.6 16 34.5 27 38.5 29 39.0 31 39.0 7 35.5 7 29.0 1 22.5 2 17.5 7 39.0 1971 14.4 5 16.5 27 19.4 26 23.5 27 30.5 16 36.5 26 37.6 8 36.5 17 34.0 1 27.0 1 19.5 4 14.6 12 37.6 1972 8.2 18 12.5 15 16.5 15 27.5 23 30.0 27 37.0 22 38.0 5 34.5 11 36.0 3 29.5 3 23.5 3 ***** ** ***** 1973 ***** ** 22.0 19 23.0 2 31.5 28 32.0 17 37.5 27 39.5 13 37.5 4 36.5 2 32.0 8 25.0 2 17.0 2 ***** 1974 7.0 16 12.0 14 24.5 19 28.5 23 32.0 21 35.5 20 37.0 2 36.0 14 34.0 17 26.0 22 27.5 3 13.5 1 37.0 1975 13.0 3 17.5 22 24.5 25 28.5 14 34.5 30 36.0 27 39.0 25 36.5 11 36.0 7 30.5 1 24.5 1 13.0 21 39.0 1976 13.5 17 18.0 8 20.0 31 26.5 17 31.0 31 35.0 29 36.0 12 36.0 1 34.0 3 28.0 1 21.0 5 19.5 15 36.0 1977 9.0 27 21.0 21 27.0 20 29.5 24 35.0 15 38.0 30 38.0 21 37.5 17 34.0 12 30.5 5 18.0 2 14.5 4 38.0 1978 15.5 4 18.5 20 25.0 30 29.0 10 32.0 26 37.5 30 38.5 1 36.0 6 34.5 13 28.5 1 18.0 2 18.0 11 38.5 1979 19.0 5 17.5 14 22.5 26 30.0 5 28.5 16 35.0 30 38.0 18 35.0 18 34.5 12 29.5 3 24.5 2 15.5 9 38.0 1980 14.0 29 13.0 23 23.5 27 28.0 22 31.0 27 34.5 9 36.0 29 36.0 23 34.5 5 31.0 3 19.5 14 18.0 6 36.0 1981 14.5 25 17.5 19 25.5 24 28.0 22 33.5 27 35.0 24 37.0 10 36.5 10 35.0 20 26.5 3 24.5 2 19.0 15 37.0 1982 19.0 15 16.0 28 19.5 24 28.0 24 32.5 18 38.0 12 39.5 17 ***** ** 35.0 2 ***** ** ***** ** ***** ** ***** 1983 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1984 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1985 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1986 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1987 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** 35.0 5 35.5 6 27.0 2 23.0 7 14.5 11 ***** 1988 10.0 6 15.5 1 21.5 20 27.5 23 33.5 28 36.0 14 37.5 3 35.5 2 34.0 11 26.0 20 27.0 5 17.0 4 37.5 1989 10.5 20 14.5 28 20.5 26 26.5 15 34.5 31 38.5 30 38.5 13 36.0 5 34.5 4 28.6 8 19.5 28 16.5 1 38.5 1990 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1991 13.0 31 14.0 27 19.5 24 26.5 22 30.5 16 35.0 11 37.5 7 38.0 6 35.5 7 ***** ** ***** ** ***** ** ***** 1992 9.0 2 15.0 24 19.0 30 24.5 22 27.5 29 35.0 30 37.6 5 34.0 1 31.0 25 24.0 4 19.5 7 15.8 12 37.6 1993 12.6 29 17.8 28 18.6 31 27.4 20 29.2 31 35.0 30 36.2 3 35.8 14 34.4 3 28.0 1 22.0 1 16.0 18 36.2 1994 17.0 4 14.8 1 20.2 30 28.0 24 29.8 31 36.0 20 39.0 30 37.4 3 30.6 2 23.8 1 20.4 4 14.8 20 39.0 1995 14.0 17 13.0 4 22.6 25 24.0 3 29.6 7 35.2 21 38.6 16 37.0 5 31.8 12 28.8 4 22.2 10 10.0 29 38.6 1996 12.6 5 19.6 10 20.4 31 25.0 22 32.2 31 36.2 4 34.8 2 35.6 22 33.4 5 26.8 14 19.2 8 17.8 28 36.2 1997 15.6 7 17.8 22 16.8 23 26.6 27 29.4 30 35.0 16 38.2 30 38.6 14 33.2 2 30.2 6 19.2 4 13.2 9 38.6 1998 9.6 30 18.0 7 22.4 29 28.2 17 32.2 29 35.6 28 38.2 11 38.0 20 33.4 3 29.0 2 22.2 20 19.0 14 38.2 1999 13.8 9 16.2 8 20.6 31 23.2 30 33.0 31 37.4 28 38.4 4 34.8 29 32.8 11 28.6 12 19.0 1 16.2 30 38.4 2000 13.4 3 15.2 24 20.4 24 27.2 15 33.8 26 38.4 24 37.4 11 36.2 3 34.4 10 25.8 26 17.8 3 13.8 25 38.4 HIG. 19.0 5 22.0 19 28.0 15 31.5 28 35.0 27 38.5 29 39.6 13 42.5 21 42.2 1 32.0 8 27.5 3 20.0 1 42.5 YEAR 1979 1973 1969 1973 1965 1970 1964 1964 1964 1973 1974 1965 1964 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 10 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 1964 ***** ** ***** ** 3.3 21 13.2 17 3.3 29 0.0 ** 0.0 ** 0.0 ** 0.0 ** ***** ** ***** ** ***** ** ***** 1965 ***** ** ***** ** ***** ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 1.0 21 ***** 1966 7.0 13 7.0 2 3.5 2 2.0 26 5.0 1 0.0 ** 0.0 ** 0.0 ** 0.0 ** 3.0 22 0.0 ** 0.0 ** 7.0 1967 1.0 3 8.0 13 0.0 ** 7.0 15 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 7.0 13 0.0 ** 8.0 1968 5.0 16 ***** ** 0.0 ** 15.0 2 19.0 27 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 11.0 2 7.0 7 ***** 1969 13.0 22 0.0 ** 0.0 ** 4.0 11 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 6.0 3 13.0 1970 10.0 22 7.0 5 6.0 16 8.0 28 9.0 1 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 16.0 13 16.0 1971 5.0 31 7.0 1 17.0 22 8.0 10 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 14.0 10 4.0 14 17.0 1972 14.0 30 20.0 20 22.0 3 7.0 24 8.0 22 5.0 9 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** ***** ** ***** 1973 ***** ** 0.0 ** 19.0 16 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** ***** 1974 16.0 23 11.8 20 0.0 ** 8.0 11 8.0 17 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 6.0 8 18.0 5 18.0 1975 10.0 23 4.0 3 0.0 ** 24.4 15 14.0 6 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 15.0 16 25.0 3 25.0 1976 0.0 ** 13.0 28 28.0 25 10.0 4 0.0 ** 8.0 6 0.0 ** 0.0 ** 0.0 ** 17.0 31 19.0 29 6.0 19 28.0 1977 15.0 3 0.0 ** 10.0 27 30.0 2 10.0 31 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 6.0 6 10.0 15 30.0 1978 0.0 ** 0.0 ** 7.0 8 0.0 ** 6.0 2 0.0 ** 2.0 7 0.0 ** 0.0 ** 0.0 ** 5.0 12 16.5 5 16.5 1979 18.8 10 0.0 ** 18.0 27 0.0 ** 28.0 7 7.0 4 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 10.0 21 28.0 1980 20.0 17 28.0 12 26.0 20 0.0 ** 10.0 6 0.0 ** 0.0 ** 0.0 ** 0.0 ** 25.0 30 11.0 8 10.0 18 28.0 1981 20.0 12 7.0 21 6.0 28 5.0 17 0.0 ** 7.0 28 0.0 ** 0.0 ** 0.0 ** 9.0 14 0.0 ** 1.7 31 20.0 1982 3.0 17 4.2 14 12.0 15 0.0 ** 0.0 ** 0.0 ** 0.0 ** ***** ** 0.0 ** ***** ** ***** ** ***** ** ***** 1983 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1984 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1985 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1986 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1987 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** 0.0 ** 0.0 ** 6.2 27 3.0 29 11.0 24 ***** 1988 5.5 18 11.4 17 12.5 23 11.8 26 1.5 20 0.0 ** 0.0 ** 0.0 ** 0.0 ** 8.0 16 2.6 13 2.8 26 12.5 1989 4.0 12 7.5 23 15.8 16 4.5 12 3.0 6 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 14.0 17 37.1 4 37.1 1990 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1991 3.6 14 9.2 22 12.5 31 3.2 29 3.0 7 0.0 ** 0.0 ** 0.0 ** 0.0 ** ***** ** ***** ** ***** ** ***** 1992 20.0 25 13.0 25 15.0 18 16.0 25 26.0 7 1.0 15 0.0 ** 3.0 13 0.0 ** 0.0 ** 0.0 ** 8.0 9 26.0 1993 7.2 7 10.0 3 20.0 9 9.5 27 8.0 6 0.0 ** 0.0 ** 0.2 28 0.3 27 0.0 ** 16.0 12 0.3 16 20.0 1994 7.0 5 29.0 1 28.3 27 3.2 18 5.0 16 0.0 ** 0.0 ** 0.0 ** 0.0 ** 4.8 16 10.7 17 2.0 3 29.0 1995 2.0 1 8.0 24 27.0 21 15.0 13 25.0 29 6.0 6 0.0 ** 0.0 ** 0.3 22 0.0 ** 0.0 ** 5.4 12 27.0 1996 15.0 13 21.0 5 35.0 4 3.1 4 8.0 22 4.0 28 0.0 ** 0.0 ** 0.0 ** 0.1 15 0.7 22 5.0 15 35.0 1997 2.0 16 1.0 1 10.1 13 8.0 5 4.0 19 4.0 14 0.0 ** 0.0 ** 0.0 ** 11.0 24 2.4 1 16.0 21 16.0 1998 5.0 13 30.0 10 26.0 18 3.0 6 8.0 14 0.0 ** 0.5 25 5.0 4 0.2 14 8.0 10 0.2 13 2.0 4 30.0 1999 19.0 25 1.0 6 29.0 2 5.0 29 1.0 14 0.0 ** 3.0 28 0.0 ** 0.0 ** 0.0 ** 8.0 9 9.0 12 29.0 2000 16.0 29 5.5 14 2.0 25 2.0 18 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 33.0 4 37.0 6 20.5 11 37.0 HIG. 20.0 17 30.0 10 35.0 4 30.0 2 28.0 7 8.0 6 3.0 28 5.0 4 0.3 27 33.0 4 37.0 6 37.1 4 37.1 YEAR 1980 1998 1996 1977 1979 1976 1999 1998 1993 2000 2000 1989 1989 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 11 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. MONTHLY TOTAL PRECIPITATION WITH SEASONAL PERCENT. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL SEASONAL-PERCENT ----------------------- 1964 ****** ****** 3.3 14.0 3.3 0.0 0.0 0.0 0.0 ****** ****** ****** ****** 16.0 84.0 0.0 ***** 1965 ****** ****** ****** 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 ****** ***** 0.0 0.0 100.0 1966 12.0 12.0 3.5 2.0 5.0 0.0 0.0 0.0 0.0 5.7 0.0 0.0 40.2 68.4 17.4 0.0 14.2 1967 2.0 8.0 0.0 8.5 0.0 0.0 0.0 0.0 0.0 0.0 7.0 0.0 25.5 39.2 33.3 0.0 27.5 1968 5.0 ****** 0.0 27.0 39.0 0.0 0.0 0.0 0.0 0.0 11.0 7.0 ****** 5.6 74.2 0.0 20.2 1969 38.5 0.0 0.0 11.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 60.5 63.6 18.2 0.0 18.2 1970 25.0 12.5 21.1 22.1 19.3 0.0 0.0 0.0 0.0 0.0 0.0 16.0 116.0 50.5 35.7 0.0 13.8 1971 9.0 7.0 40.5 34.5 0.0 0.0 0.0 0.0 0.0 0.0 41.0 4.0 136.0 41.5 25.4 0.0 33.1 1972 33.4 54.0 75.0 12.0 19.0 5.0 0.0 0.0 0.0 0.0 0.0 ****** ****** 81.9 18.1 0.0 0.0 1973 ****** 0.0 38.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ****** 100.0 0.0 0.0 0.0 1974 48.0 31.8 0.0 8.0 8.0 0.0 0.0 0.0 0.0 0.0 6.0 43.0 144.8 55.1 11.0 0.0 33.8 1975 41.0 4.0 0.0 45.0 33.0 0.0 0.0 0.0 0.0 0.0 30.0 30.0 183.0 24.6 42.6 0.0 32.8 1976 0.0 54.0 56.0 33.0 0.0 8.0 0.0 0.0 0.0 27.0 19.0 10.0 207.0 53.1 19.8 0.0 27.1 1977 44.0 0.0 10.0 45.0 19.0 0.0 0.0 0.0 0.0 0.0 15.0 10.0 143.0 37.8 44.8 0.0 17.5 1978 0.0 0.0 15.0 0.0 6.0 0.0 2.0 0.0 0.0 0.0 5.0 31.5 59.5 25.2 10.1 3.4 61.3 1979 39.8 0.0 31.0 0.0 50.0 7.0 0.0 0.0 0.0 0.0 0.0 32.0 159.8 44.3 35.7 0.0 20.0 1980 44.0 57.6 26.0 0.0 10.0 0.0 0.0 0.0 0.0 25.0 11.0 15.0 188.6 67.7 5.3 0.0 27.0 1981 20.0 17.0 6.0 5.0 0.0 12.0 0.0 0.0 0.0 16.0 0.0 1.7 77.7 55.3 21.9 0.0 22.8 1982 3.0 9.2 33.0 0.0 0.0 0.0 0.0 ****** 0.0 ****** ****** ****** ****** 100.0 0.0 0.0 ***** 1983 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1987 ****** ****** ****** ****** ****** ****** ****** 0.0 0.0 19.4 3.0 26.4 ****** ***** ***** 0.0 100.0 1988 12.0 52.3 26.9 25.1 1.5 0.0 0.0 0.0 0.0 14.3 2.6 3.8 138.5 65.8 19.2 0.0 14.9 1989 16.9 16.3 44.5 6.7 7.2 0.0 0.0 0.0 0.0 0.0 31.5 60.2 183.3 42.4 7.6 0.0 50.0 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1991 10.2 25.3 55.8 3.2 5.8 0.0 0.0 0.0 0.0 ****** ****** ****** ****** 91.0 9.0 0.0 ***** 1992 47.8 16.0 47.9 33.5 84.7 1.0 0.0 3.0 0.0 0.0 0.0 20.1 254.0 44.0 46.9 1.2 7.9 1993 21.1 40.8 48.1 30.7 10.3 0.0 0.0 0.2 0.3 0.0 25.4 0.3 177.2 62.1 23.1 0.3 14.5 1994 14.4 39.4 50.5 10.6 11.4 0.0 0.0 0.0 0.0 16.9 18.4 5.6 167.2 62.4 13.2 0.0 24.5 1995 2.0 22.3 32.0 49.7 59.0 7.3 0.0 0.0 0.3 0.0 0.0 19.8 192.4 29.3 60.3 0.2 10.3 1996 40.0 60.3 121.5 14.0 21.9 4.4 0.0 0.0 0.0 0.1 0.7 8.0 270.9 81.9 14.9 0.0 3.2 1997 4.2 1.1 45.4 11.7 16.6 7.3 0.0 0.0 0.0 12.7 5.9 29.4 134.3 37.8 26.5 0.0 35.7 1998 20.6 61.3 85.2 7.4 21.3 0.0 0.5 9.4 0.2 12.0 0.2 2.9 221.0 75.6 13.0 4.6 6.8 1999 48.1 2.3 71.9 13.6 1.0 0.0 4.0 0.0 0.0 0.0 18.4 15.9 175.2 69.8 8.3 2.3 19.6 2000 26.8 9.7 2.2 2.9 0.0 0.0 0.0 0.0 0.0 35.8 56.8 59.9 194.1 19.9 1.5 0.0 78.6 MEAN 22.5 21.9 33.0 15.4 14.6 1.7 0.2 0.4 0.0 6.4 10.6 16.6 143.3 54.2 22.0 0.4 23.4 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 12 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. NO. OF DAYS WITH PRECIPITATION YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 *** *** 1 2 1 0 0 0 0 *** *** *** *** 1965 *** *** *** 0 0 0 0 0 0 0 0 1 *** 1966 2 3 1 1 1 0 0 0 0 2 0 0 10 1967 2 1 0 2 0 0 0 0 0 0 1 0 6 1968 1 *** 0 2 4 0 0 0 0 0 1 1 *** 1969 4 0 0 3 0 0 0 0 0 0 0 2 9 1970 5 2 5 4 3 0 0 0 0 0 0 1 20 1971 2 1 4 6 0 0 0 0 0 0 5 1 19 1972 4 5 4 2 3 1 0 0 0 0 0 *** *** 1973 *** 0 3 0 0 0 0 0 0 0 0 0 *** 1974 5 7 0 1 1 0 0 0 0 0 1 3 18 1975 5 1 0 3 3 0 0 0 0 0 3 2 17 1976 0 7 3 4 0 1 0 0 0 2 1 2 20 1977 6 0 1 2 2 0 0 0 0 0 3 1 15 1978 0 0 4 0 1 0 1 0 0 0 1 2 9 1979 3 0 2 0 3 1 0 0 0 0 0 5 14 1980 5 3 1 0 1 0 0 0 0 1 1 2 14 1981 1 3 2 1 0 2 0 0 0 2 0 1 12 1982 1 3 4 0 0 0 0 *** 0 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 0 0 10 1 6 *** 1988 4 9 4 7 1 0 0 0 0 2 1 2 30 1989 7 4 8 3 4 0 0 0 0 0 5 7 38 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 5 7 11 1 4 0 0 0 0 *** *** *** *** 1992 8 2 8 6 14 1 0 1 0 0 0 8 48 1993 8 9 10 7 6 0 0 1 1 0 5 1 48 1994 3 4 7 8 6 0 0 0 0 9 4 5 46 1995 1 7 3 10 5 3 0 0 1 0 0 11 41 1996 6 11 15 7 13 2 0 0 0 1 1 2 58 1997 3 2 11 6 10 6 0 0 0 3 6 8 55 1998 9 11 9 4 6 0 1 4 1 4 1 3 53 1999 13 3 10 7 1 0 2 0 0 0 6 5 47 2000 4 4 2 3 0 0 0 0 0 5 6 10 34 MEAN 4 4 4 3 3 1 0 0 0 1 2 3 25 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 13 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 1964 *** *** 1 1 1 0 0 0 0 *** *** *** *** 1965 *** *** *** 0 0 0 0 0 0 0 0 1 *** 1966 2 3 1 1 1 0 0 0 0 2 0 0 10 1967 2 1 0 2 0 0 0 0 0 0 1 0 6 1968 1 *** 0 2 4 0 0 0 0 0 1 1 *** 1969 4 0 0 3 0 0 0 0 0 0 0 2 9 1970 5 2 5 4 3 0 0 0 0 0 0 1 20 1971 2 1 4 6 0 0 0 0 0 0 5 1 19 1972 4 5 4 2 3 1 0 0 0 0 0 *** *** 1973 *** 0 3 0 0 0 0 0 0 0 0 0 *** 1974 5 7 0 1 1 0 0 0 0 0 1 3 18 1975 5 1 0 3 3 0 0 0 0 0 3 2 17 1976 0 7 3 4 0 1 0 0 0 2 1 2 20 1977 6 0 1 2 2 0 0 0 0 0 3 1 15 1978 0 0 4 0 1 0 1 0 0 0 1 2 9 1979 3 0 2 0 3 1 0 0 0 0 0 5 14 1980 5 3 1 0 1 0 0 0 0 1 1 2 14 1981 1 3 1 1 0 2 0 0 0 2 0 1 11 1982 1 3 4 0 0 0 0 *** 0 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 0 0 7 1 6 *** 1988 4 9 3 6 1 0 0 0 0 2 1 2 28 1989 7 4 7 3 2 0 0 0 0 0 4 6 33 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 3 6 10 1 3 0 0 0 0 *** *** *** *** 1992 7 2 6 5 13 1 0 1 0 0 0 4 39 1993 6 8 7 7 2 0 0 0 0 0 4 0 34 1994 3 3 6 3 3 0 0 0 0 6 2 2 28 1995 1 4 3 7 5 1 0 0 0 0 0 6 27 1996 6 8 12 5 6 1 0 0 0 0 0 2 40 1997 2 1 9 2 6 1 0 0 0 2 2 4 29 1998 7 7 9 3 5 0 0 2 0 2 0 1 36 1999 8 2 6 4 1 0 2 0 0 0 4 3 30 2000 2 3 1 1 0 0 0 0 0 2 6 10 25 MEAN 4 3 4 3 2 0 0 0 0 1 1 3 21 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 14 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 1964 *** *** 0 1 0 0 0 0 0 *** *** *** *** 1965 *** *** *** 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 2 1 0 0 0 0 0 1 0 *** 1969 3 0 0 0 0 0 0 0 0 0 0 0 3 1970 1 0 0 0 0 0 0 0 0 0 0 1 2 1971 0 0 2 0 0 0 0 0 0 0 2 0 4 1972 2 4 4 0 0 0 0 0 0 0 0 *** *** 1973 *** 0 2 0 0 0 0 0 0 0 0 0 *** 1974 2 1 0 0 0 0 0 0 0 0 0 3 6 1975 1 0 0 3 2 0 0 0 0 0 2 1 9 1976 0 2 3 1 0 0 0 0 0 2 1 0 9 1977 2 0 1 2 1 0 0 0 0 0 0 1 7 1978 0 0 0 0 0 0 0 0 0 0 0 2 2 1979 2 0 2 0 2 0 0 0 0 0 0 1 7 1980 2 2 1 0 1 0 0 0 0 1 1 1 9 1981 1 0 0 0 0 0 0 0 0 0 0 0 1 1982 0 0 2 0 0 0 0 *** 0 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 0 0 0 0 2 *** 1988 0 1 2 1 0 0 0 0 0 0 0 0 4 1989 0 0 2 0 0 0 0 0 0 0 1 1 4 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 0 2 0 0 0 0 0 0 *** *** *** *** 1992 1 1 2 1 4 0 0 0 0 0 0 0 9 1993 0 2 1 0 0 0 0 0 0 0 1 0 4 1994 0 1 1 0 0 0 0 0 0 0 1 0 3 1995 0 0 1 1 2 0 0 0 0 0 0 0 4 1996 2 2 6 0 0 0 0 0 0 0 0 0 10 1997 0 0 1 0 0 0 0 0 0 1 0 1 3 1998 0 2 3 0 0 0 0 0 0 0 0 0 5 1999 2 0 3 0 0 0 0 0 0 0 0 0 5 2000 2 0 0 0 0 0 0 0 0 1 2 2 7 MEAN 1 1 1 0 0 0 0 0 0 0 0 1 4 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 15 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 03 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 *** *** *** 44 38 31 33 50 64 *** *** *** *** 1965 *** *** *** *** 47 35 34 41 49 55 54 71 *** 1966 58 72 61 49 40 33 48 39 41 59 61 56 51 1967 77 72 47 50 42 36 46 42 43 56 74 62 54 1968 64 *** 38 55 61 46 40 42 48 52 61 65 *** 1969 68 69 40 52 50 34 26 40 45 61 67 55 51 1970 70 67 65 41 48 29 42 39 53 51 49 66 52 1971 77 72 55 50 41 36 33 33 46 53 69 74 53 1972 64 68 77 65 74 61 62 62 64 62 77 *** *** 1973 *** 79 72 54 59 54 60 49 64 52 65 63 *** 1974 67 78 73 61 58 56 67 62 62 63 58 74 65 1975 69 70 65 67 58 42 42 47 51 59 68 73 59 1976 72 75 73 74 63 53 48 50 60 65 71 74 65 1977 80 72 68 66 63 50 37 44 54 67 76 78 63 1978 77 78 70 61 56 53 49 49 55 58 77 72 63 1979 76 75 74 64 62 50 37 47 47 58 70 77 61 1980 81 82 70 55 53 44 48 50 53 58 69 71 61 1981 79 75 62 55 47 41 39 43 45 62 61 66 56 1982 75 73 69 56 47 42 39 *** 42 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 35 38 62 52 69 *** 1988 66 66 52 50 33 27 30 29 29 42 43 46 43 1989 64 59 62 41 38 27 28 27 30 35 58 56 44 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 73 68 69 40 37 29 29 28 33 *** *** *** *** 1992 64 53 63 49 59 38 28 37 32 38 46 72 48 1993 72 69 53 49 44 26 31 29 24 34 60 59 46 1994 60 57 54 44 37 25 29 23 28 55 52 51 43 1995 52 57 46 53 48 40 29 18 32 40 36 67 43 1996 70 72 73 60 55 35 34 29 28 42 54 50 50 1997 52 39 58 40 40 34 30 22 30 40 61 69 43 1998 76 74 61 47 47 26 30 31 28 39 31 43 44 1999 71 48 51 48 29 22 34 25 29 31 60 56 42 2000 51 56 42 35 30 27 26 24 30 53 70 72 43 MEAN 69 68 61 53 49 38 38 38 43 52 60 65 53 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 16 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 09 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 *** *** *** 27 22 16 18 31 58 *** *** *** *** 1965 *** *** *** *** 38 27 24 21 22 35 38 47 *** 1966 46 51 43 31 24 27 22 32 27 39 50 46 37 1967 67 65 37 42 26 19 39 46 39 45 65 *** *** 1968 50 *** 46 32 27 28 25 28 24 30 49 47 *** 1969 53 59 35 36 31 24 17 23 28 42 36 49 36 1970 70 55 54 34 35 23 32 26 32 43 33 61 42 1971 61 48 59 42 33 27 24 23 36 43 55 60 43 1972 71 69 58 42 45 33 35 38 30 31 45 *** *** 1973 *** 47 49 33 31 27 28 27 26 24 35 48 *** 1974 58 64 55 35 33 34 38 33 35 37 40 62 44 1975 59 54 38 44 36 29 18 30 28 36 49 62 40 1976 55 56 55 46 30 32 20 22 31 41 53 57 42 1977 63 43 37 33 34 22 16 20 28 34 42 50 35 1978 48 41 38 28 28 25 21 21 20 30 41 46 32 1979 45 45 39 34 28 21 20 19 27 31 31 51 33 1980 49 49 39 24 21 23 19 20 25 29 43 47 32 1981 51 44 34 27 25 23 21 18 23 28 30 38 30 1982 45 43 36 28 24 20 19 *** 20 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 21 21 43 32 47 *** 1988 54 55 39 33 19 15 19 19 19 27 25 33 30 1989 45 41 43 27 26 17 18 17 21 23 41 45 30 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 65 55 52 25 24 19 20 20 24 *** *** *** *** 1992 55 49 48 36 48 25 18 25 24 28 34 60 38 1993 66 58 42 37 30 17 18 16 14 22 46 45 34 1994 51 43 37 28 24 17 18 15 16 40 36 39 30 1995 38 43 30 37 35 26 21 13 24 25 28 61 32 1996 60 67 61 43 42 25 21 19 21 31 36 36 39 1997 43 28 42 27 29 25 22 14 22 28 45 59 32 1998 64 56 43 32 33 17 19 19 19 28 25 35 33 1999 61 34 40 33 17 13 21 16 21 22 46 44 31 2000 44 39 25 23 21 18 17 15 21 41 58 67 32 MEAN 55 50 43 33 30 23 22 23 26 33 41 50 36 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 17 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 15 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 *** *** *** 37 26 16 27 45 64 *** *** *** *** 1965 *** *** *** *** 36 16 21 26 26 49 53 74 *** 1966 63 61 52 48 36 28 24 37 25 51 42 53 43 1967 62 68 38 39 40 32 43 32 28 47 67 61 46 1968 67 *** 55 59 35 31 23 43 39 37 60 63 *** 1969 75 70 36 66 37 27 31 31 45 42 66 59 49 1970 75 58 49 43 41 24 30 24 43 48 46 66 46 1971 66 61 61 48 36 27 27 27 41 49 72 64 48 1972 70 64 67 44 54 41 38 41 45 46 63 *** *** 1973 *** 61 50 38 40 34 35 30 36 40 59 61 *** 1974 63 66 62 47 42 37 36 37 43 47 56 67 50 1975 58 60 50 53 39 33 25 30 30 35 50 66 44 1976 61 61 60 48 27 36 28 24 32 40 57 61 45 1977 68 52 44 40 33 30 22 24 28 34 53 58 41 1978 54 51 47 32 32 31 25 24 21 31 46 53 37 1979 58 54 45 40 34 30 21 22 26 35 44 56 39 1980 55 54 45 36 26 24 20 22 27 36 44 55 37 1981 57 51 42 33 28 25 23 21 26 32 36 42 35 1982 46 45 37 31 28 23 22 *** 22 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 22 23 52 41 54 *** 1988 59 63 42 38 21 14 18 17 21 34 30 39 33 1989 56 48 51 31 29 19 18 17 21 29 49 61 36 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 71 61 62 28 29 18 20 19 25 *** *** *** *** 1992 64 47 51 43 51 25 18 25 26 33 43 69 41 1993 74 64 46 41 33 16 17 16 17 28 53 55 38 1994 61 51 42 34 27 15 17 14 19 50 47 52 36 1995 51 50 34 45 36 25 19 13 24 32 31 71 36 1996 71 72 71 52 46 26 20 19 24 34 44 47 44 1997 49 29 43 33 30 27 21 14 24 35 55 72 36 1998 69 65 49 35 35 16 18 20 22 33 31 42 36 1999 68 38 45 36 18 11 20 17 23 27 57 60 35 2000 51 42 28 26 22 17 15 15 23 47 68 74 36 MEAN 62 56 48 41 34 25 24 25 29 39 50 59 41 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 18 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 1964 *** *** *** 0 0 0 0 0 0 *** *** *** *** 1965 *** *** *** *** 0 0 0 0 0 0 0 1 *** 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 21 *** 1968 15 *** 29 8 0 0 0 0 0 0 0 29 *** 1969 *** *** 0 0 0 0 0 0 0 0 *** 0 *** 1970 4 0 0 0 0 0 0 0 0 0 0 8 12 1971 7 0 0 0 0 0 0 0 0 0 0 8 15 1972 31 25 5 0 0 0 0 0 0 0 5 *** *** 1973 *** 6 3 0 0 0 0 0 0 0 12 22 *** 1974 30 22 1 0 0 0 0 0 0 0 3 22 78 1975 29 22 15 0 0 0 0 0 0 0 4 21 91 1976 23 23 11 0 0 0 0 0 0 0 8 9 74 1977 27 12 0 0 0 0 0 0 0 0 2 11 52 1978 16 9 1 0 0 0 0 0 0 0 10 4 40 1979 6 2 5 0 0 0 0 0 0 0 3 10 26 1980 17 11 3 0 0 0 0 0 0 0 0 12 43 1981 13 7 2 0 0 0 0 0 0 0 0 0 22 1982 16 21 1 0 0 0 0 *** 0 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 0 0 0 0 2 *** 1988 7 8 0 0 0 0 0 0 0 0 0 2 17 1989 22 16 0 0 0 0 0 0 0 0 0 0 38 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 4 13 0 0 0 0 0 0 0 *** *** *** *** 1992 18 14 6 0 0 0 0 0 0 0 1 4 43 1993 21 5 1 0 0 0 0 0 0 0 1 0 28 1994 1 4 0 0 0 0 0 0 0 0 0 12 17 1995 3 0 0 0 0 0 0 0 0 0 1 5 9 1996 17 2 0 0 0 0 0 0 0 0 0 0 19 1997 2 11 1 0 0 0 0 0 0 0 0 1 15 1998 11 6 2 0 0 0 0 0 0 0 0 0 19 1999 7 0 0 0 0 0 0 0 0 0 1 0 8 2000 10 4 0 0 0 0 0 0 0 0 0 0 14 MEAN 13 9 3 0 0 0 0 0 0 0 2 7 34 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 19 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 1964 *** *** *** 0 0 2 22 15 8 *** *** *** *** 1965 *** *** *** *** 0 0 0 0 0 0 0 0 *** 1966 0 0 0 0 0 0 0 2 0 0 0 0 2 1967 0 *** 0 0 0 1 14 23 0 0 0 0 *** 1968 0 *** 0 0 0 0 0 0 0 0 0 0 *** 1969 *** *** 0 0 0 0 0 0 0 0 *** 0 *** 1970 0 0 0 0 0 6 9 11 0 0 0 0 26 1971 0 0 0 0 0 6 13 0 0 0 0 0 19 1972 0 0 0 0 0 0 0 0 0 0 0 *** *** 1973 *** 0 0 0 0 0 0 0 0 0 0 0 *** 1974 0 0 0 0 0 0 0 0 0 0 0 0 0 1975 0 0 0 0 0 0 0 1 0 0 0 0 1 1976 0 0 0 0 0 0 0 0 0 0 0 0 0 1977 0 0 0 0 0 0 0 0 0 0 0 0 0 1978 0 0 0 0 0 0 0 0 0 0 0 0 0 1979 0 0 0 0 0 0 0 0 0 0 0 0 0 1980 0 0 0 0 0 0 0 0 0 0 0 0 0 1981 0 0 0 0 0 0 2 0 0 0 0 0 2 1982 0 0 0 0 0 0 2 *** 0 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 22 2 0 0 0 *** 1988 0 0 0 0 0 7 22 24 4 0 0 0 57 1989 0 0 0 0 4 21 26 26 11 0 0 0 88 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 0 0 0 0 6 25 21 7 *** *** *** *** 1992 0 0 0 0 0 7 27 8 0 0 0 0 42 1993 0 0 0 0 0 12 21 16 11 0 0 0 60 1994 0 0 0 0 0 10 28 29 0 0 0 0 67 1995 0 0 0 0 0 9 31 29 6 0 0 0 75 1996 0 0 0 0 1 11 20 24 12 0 0 0 68 1997 0 0 0 0 1 15 31 29 4 0 0 0 80 1998 0 0 0 0 0 13 24 23 7 0 0 0 67 1999 0 0 0 0 1 16 21 29 7 0 0 0 74 2000 0 0 0 0 1 13 20 24 9 0 0 0 67 MEAN 0 0 0 0 0 5 12 11 3 0 0 0 31 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 20 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 1964 *** *** *** 0 *** *** 0 0 0 *** *** *** *** 1965 *** *** *** *** 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 *** *** 1968 0 *** 0 0 0 0 0 0 0 0 0 0 *** 1969 *** *** 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 2 9 0 0 0 0 0 0 0 0 0 *** *** 1973 *** 0 0 0 0 0 0 0 0 0 0 0 *** 1974 0 2 0 0 0 0 0 0 0 0 0 2 4 1975 0 0 0 0 0 0 0 0 0 0 0 0 0 1976 0 0 0 0 0 0 0 0 0 0 0 0 0 1977 4 0 0 0 0 0 0 0 0 0 0 0 4 1978 0 0 0 0 0 0 0 0 0 0 0 0 0 1979 0 0 0 0 0 0 0 0 0 0 0 0 0 1980 0 0 0 0 0 0 0 0 0 0 0 0 0 1981 0 0 0 0 0 0 0 0 0 0 0 0 0 1982 0 0 0 0 0 0 0 *** 0 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 0 0 0 0 0 *** 1988 0 3 0 0 0 0 0 0 0 0 0 0 3 1989 6 4 0 0 0 0 0 0 0 0 0 0 10 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 9 0 0 0 0 0 0 0 *** *** *** *** 1992 9 0 2 0 0 0 0 0 0 0 0 2 13 1993 12 0 0 0 0 0 0 0 0 0 0 0 12 1994 0 1 0 0 0 0 0 0 0 0 0 3 4 1995 0 0 0 0 0 0 0 0 0 0 0 1 1 1996 9 0 0 0 0 0 0 0 0 0 0 0 9 1997 0 0 1 0 0 0 0 0 0 0 0 0 1 1998 1 2 1 0 0 0 0 0 0 0 0 0 4 1999 0 0 0 0 0 0 0 0 0 0 0 0 0 2000 1 1 0 0 0 0 0 0 0 0 0 0 2 MEAN 2 1 0 0 0 0 0 0 0 0 0 0 3 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 21 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 1964 *** *** *** 0 *** *** 31 31 19 *** *** *** *** 1965 *** *** *** *** 12 20 30 30 *** *** 0 0 *** 1966 0 0 0 0 9 30 22 31 13 0 0 0 105 1967 0 0 0 0 8 15 28 31 *** 0 0 *** *** 1968 0 *** 0 0 1 13 30 28 23 0 0 0 *** 1969 *** *** 0 *** *** *** *** *** *** *** *** 0 *** 1970 0 0 0 0 14 26 29 31 9 0 0 0 109 1971 0 0 0 0 6 25 31 29 8 0 0 0 99 1972 0 0 0 0 2 27 31 29 20 0 0 *** *** 1973 *** 0 0 3 8 26 31 31 24 10 0 0 *** 1974 0 0 0 0 8 23 25 26 10 0 0 0 92 1975 0 0 0 0 8 23 31 29 22 1 0 0 114 1976 0 0 0 0 3 22 28 29 18 0 0 0 100 1977 0 0 0 0 4 25 31 28 26 2 0 0 116 1978 0 0 0 0 5 19 29 31 26 0 0 0 110 1979 0 0 0 2 0 16 31 27 18 0 0 0 94 1980 0 0 0 0 7 23 31 30 19 3 0 0 113 1981 0 0 0 0 11 20 31 31 24 0 0 0 117 1982 0 0 0 0 11 30 31 *** 23 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 28 7 0 0 0 *** 1988 0 0 0 0 2 21 29 26 11 0 0 0 89 1989 0 0 0 0 7 28 28 29 14 0 0 0 106 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 0 0 0 2 16 30 27 15 *** *** *** *** 1992 0 0 0 0 0 11 27 17 1 0 0 0 56 1993 0 0 0 0 0 18 29 27 15 0 0 0 89 1994 0 0 0 0 0 20 29 31 2 0 0 0 82 1995 0 0 0 0 0 15 31 31 12 0 0 0 89 1996 0 0 0 0 4 17 22 27 18 0 0 0 88 1997 0 0 0 0 0 17 31 31 6 1 0 0 86 1998 0 0 0 0 5 24 28 25 9 0 0 0 91 1999 0 0 0 0 5 27 21 31 16 0 0 0 100 2000 0 0 0 0 11 21 29 30 14 0 0 0 105 MEAN 0 0 0 0 5 21 29 29 15 1 0 0 100 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 22 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 1964 *** *** *** 0 *** *** 0 5 1 *** *** *** *** 1965 *** *** *** *** 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 *** *** 1968 0 *** 0 0 0 0 0 0 0 0 0 0 *** 1969 *** *** 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 *** *** 1973 *** 0 0 0 0 0 0 0 0 0 0 0 *** 1974 0 0 0 0 0 0 0 0 0 0 0 0 0 1975 0 0 0 0 0 0 0 0 0 0 0 0 0 1976 0 0 0 0 0 0 0 0 0 0 0 0 0 1977 0 0 0 0 0 0 0 0 0 0 0 0 0 1978 0 0 0 0 0 0 0 0 0 0 0 0 0 1979 0 0 0 0 0 0 0 0 0 0 0 0 0 1980 0 0 0 0 0 0 0 0 0 0 0 0 0 1981 0 0 0 0 0 0 0 0 0 0 0 0 0 1982 0 0 0 0 0 0 0 *** 0 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 0 0 0 0 0 *** 1988 0 0 0 0 0 0 0 0 0 0 0 0 0 1989 0 0 0 0 0 0 0 0 0 0 0 0 0 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 0 0 0 0 0 0 0 0 *** *** *** *** 1992 0 0 0 0 0 0 0 0 0 0 0 0 0 1993 0 0 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 23 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 1964 *** *** *** 0 *** *** 0 0 0 *** *** *** *** 1965 *** *** *** *** 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 *** *** 1968 0 *** 0 0 0 0 0 0 0 0 0 0 *** 1969 *** *** 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 *** *** 1973 *** 0 0 0 0 0 0 0 0 0 0 0 *** 1974 0 0 0 0 0 0 0 0 0 0 0 0 0 1975 0 0 0 0 0 0 0 0 0 0 0 0 0 1976 0 0 0 0 0 0 0 0 0 0 0 0 0 1977 0 0 0 0 0 0 0 0 0 0 0 0 0 1978 0 0 0 0 0 0 0 0 0 0 0 0 0 1979 0 0 0 0 0 0 0 0 0 0 0 0 0 1980 0 0 0 0 0 0 0 0 0 0 0 0 0 1981 0 0 0 0 0 0 0 0 0 0 0 0 0 1982 0 0 0 0 0 0 0 *** 0 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 0 0 0 0 0 *** 1988 0 0 0 0 0 0 0 0 0 0 0 0 0 1989 0 0 0 0 0 0 0 0 0 0 0 0 0 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 0 0 0 0 0 0 0 0 *** *** *** *** 1992 0 0 0 0 0 0 0 0 0 0 0 0 0 1993 0 0 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 NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 -------------- 1964 *** *** *** 0 0 0 0 0 0 *** *** *** *** ** ** ** ** 1965 *** *** *** *** 0 0 0 0 0 0 0 6 *** 12 3 12 20 1966 5 14 5 0 0 0 0 0 0 0 0 0 24 1 8 3 6 1967 0 *** 1 1 0 0 0 0 0 0 0 31 *** 12 1 4 1 1968 31 *** 31 8 0 0 0 0 0 0 0 31 *** 12 1 4 8 1969 *** *** 0 0 0 0 0 0 0 0 *** 2 *** 12 29 12 30 1970 20 2 0 0 0 0 0 0 0 0 0 18 40 12 2 2 2 1971 13 5 0 0 0 0 0 0 0 0 2 16 36 11 14 2 14 1972 31 29 14 0 0 0 0 0 0 0 15 *** *** 11 7 3 29 1973 *** 10 7 0 0 0 0 0 0 0 14 30 *** 11 8 3 30 1974 31 27 8 1 0 0 0 0 0 0 16 30 113 11 9 4 1 1975 31 25 18 1 0 0 0 0 0 8 21 30 134 10 21 4 3 1976 29 25 25 0 0 0 0 0 0 0 13 28 120 11 14 3 30 1977 31 24 7 1 0 0 0 0 0 3 17 27 110 10 24 4 1 1978 29 25 15 3 0 0 0 0 0 0 23 22 117 11 3 4 26 1979 24 22 13 1 0 0 0 0 0 0 11 26 97 11 18 4 30 1980 29 25 12 0 0 0 0 0 0 0 6 28 100 11 21 3 18 1981 22 21 7 1 0 0 0 0 0 0 10 20 81 11 7 4 2 1982 31 28 17 0 0 0 0 *** 0 *** *** *** *** 1 1 3 23 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1987 *** *** *** *** *** *** *** 0 0 0 2 12 *** 11 29 12 31 1988 28 22 3 0 0 0 0 0 0 0 5 8 66 11 15 3 24 1989 30 26 2 0 0 0 0 0 0 0 0 7 65 12 6 3 31 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1991 28 19 4 0 0 0 0 0 0 *** *** *** *** 1 1 3 17 1992 31 26 17 0 0 0 0 0 0 0 4 17 95 11 26 3 27 1993 28 17 7 0 0 0 0 0 0 0 7 10 69 11 14 3 24 1994 18 21 3 0 0 0 0 0 0 0 0 20 62 12 5 3 17 1995 15 11 3 0 0 0 0 0 0 0 5 25 59 11 26 3 27 1996 23 13 6 1 0 0 0 0 0 0 4 8 55 11 13 4 5 1997 14 17 8 1 0 0 0 0 0 0 0 13 53 12 15 4 12 1998 28 22 6 0 0 0 0 0 0 0 0 0 56 1 2 3 6 1999 19 5 1 0 0 0 0 0 0 0 2 10 37 11 29 3 19 2000 20 18 8 0 0 0 0 0 0 0 1 7 54 11 19 3 17 MEAN 24 19 9 1 0 0 0 0 0 0 6 17 76 10 21 4 30 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 25 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 ****** ****** ****** 14.4 20.4 26.8 32.5 30.8 27.2 ****** ****** ****** ****** 1965 ****** ****** ****** ****** 20.9 25.2 28.1 27.5 23.6 17.9 10.6 5.6 ****** 1966 6.7 5.8 9.6 14.7 20.6 28.4 23.8 29.9 23.0 16.0 12.2 7.4 16.5 1967 4.9 4.4 12.9 14.1 20.2 25.5 29.7 30.4 24.4 17.2 10.9 ****** ****** 1968 3.8 ****** 6.6 14.5 20.7 25.7 29.1 27.0 25.2 18.7 10.2 5.4 ****** 1969 2.7 5.2 15.9 13.8 20.5 25.9 27.9 25.9 23.4 19.5 9.1 10.0 16.6 1970 3.2 7.8 9.6 18.6 22.1 27.9 28.8 29.8 22.7 18.7 13.7 4.7 17.3 1971 3.9 6.6 12.1 14.6 23.5 27.9 30.1 28.8 23.7 16.4 9.5 4.3 16.8 1972 -2.6 -1.5 6.7 15.3 16.7 23.9 25.9 22.6 21.1 16.3 8.3 ****** ****** 1973 ****** 7.4 9.5 15.5 19.7 25.4 27.1 25.5 22.4 17.8 8.9 2.8 ****** 1974 -2.2 -0.7 9.9 14.5 20.2 25.3 24.9 24.5 20.3 13.7 9.5 1.5 13.5 1975 0.3 3.8 8.6 14.2 20.0 25.5 29.1 25.6 22.3 16.1 7.9 2.2 14.6 1976 3.8 2.1 5.6 13.2 21.2 24.4 25.8 25.7 23.2 16.1 8.0 5.4 14.5 1977 -1.6 7.0 12.7 13.8 19.6 24.7 27.0 26.7 22.5 15.5 8.8 4.5 15.1 1978 3.0 5.7 9.8 15.4 19.5 23.3 25.6 25.8 23.2 16.8 6.5 6.7 15.1 1979 5.3 6.4 8.0 16.7 17.1 23.7 28.0 23.8 22.3 17.1 9.3 4.1 15.2 1980 3.1 2.6 9.2 16.9 20.1 24.7 26.7 24.8 22.0 15.4 10.8 5.5 15.2 1981 3.7 5.2 11.3 14.8 19.8 24.0 26.8 26.9 22.5 15.0 11.5 7.5 15.7 1982 3.3 2.4 8.0 17.7 21.1 26.9 28.5 ****** 23.7 ****** ****** ****** ****** 1983 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** 27.3 23.1 12.7 10.3 4.9 ****** 1988 1.5 3.0 9.7 14.5 22.2 26.3 28.6 27.3 23.6 17.4 11.1 6.2 16.0 1989 -1.5 -0.3 8.6 16.1 20.7 28.1 29.7 28.6 23.9 18.5 10.1 5.6 15.7 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 1.8 1.3 7.2 16.5 19.6 25.6 28.7 28.0 23.6 ****** ****** ****** ****** 1992 -1.7 1.7 4.0 13.4 16.0 24.9 29.8 25.5 22.0 16.2 10.9 2.7 13.8 1993 -0.7 3.2 7.0 15.1 19.5 26.4 28.0 27.3 25.0 15.0 7.7 5.4 14.9 1994 4.1 3.8 9.7 16.2 20.4 26.6 29.9 29.9 21.1 15.1 11.5 1.9 15.9 1995 4.9 5.4 9.7 14.8 19.7 24.8 30.7 30.4 23.5 15.9 10.9 1.7 16.0 1996 -0.8 4.6 5.8 14.0 20.9 26.5 27.4 28.1 25.3 16.3 7.8 6.2 15.2 1997 4.3 3.5 6.6 14.7 20.1 26.2 31.0 30.1 23.4 18.8 8.6 4.0 15.9 1998 0.7 2.9 8.7 16.4 20.8 27.6 29.1 28.2 24.4 16.7 13.1 9.1 16.5 1999 2.3 7.6 8.4 15.3 22.8 28.1 27.4 28.8 24.0 18.6 8.4 5.1 16.4 2000 2.6 4.2 9.3 18.7 24.1 27.1 28.6 28.4 24.7 15.4 6.9 4.1 16.2 MEAN 2.1 4.0 9.0 15.3 20.4 25.9 28.2 27.4 23.3 16.6 9.8 5.0 15.6 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 26 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 ****** ****** ****** -1.8 -0.1 0.6 8.5 14.7 18.4 ****** ****** ****** ****** 1965 ****** ****** ****** ****** 5.5 2.6 6.0 6.8 3.3 5.1 -0.8 -2.0 ****** 1966 -2.7 -2.1 -0.7 0.4 1.7 7.8 4.0 12.6 4.1 4.7 1.3 -2.6 2.4 1967 -0.7 -1.3 -1.1 1.0 3.1 4.7 15.2 13.7 7.4 5.2 4.7 ****** ****** 1968 -3.8 ****** -5.9 1.8 5.6 7.9 8.7 10.4 7.9 3.9 1.5 -2.9 ****** 1969 -3.7 -1.1 0.6 2.9 4.1 5.3 4.6 6.8 7.9 7.6 0.1 0.8 3.0 1970 -1.8 -0.1 0.5 3.5 6.9 5.5 10.7 9.2 8.5 6.7 0.7 -2.0 4.0 1971 -2.0 -1.5 3.7 2.4 7.5 8.4 8.8 6.9 9.0 5.0 2.6 -2.3 4.0 1972 -7.9 -6.5 0.7 4.4 7.6 10.3 12.0 9.7 7.8 3.7 0.7 ****** ****** 1973 ****** -0.2 0.5 1.5 5.6 8.8 11.4 8.0 6.9 1.9 -1.4 -5.7 ****** 1974 -8.7 -5.9 2.6 1.8 6.7 10.6 11.7 10.3 7.8 2.5 -0.6 -4.1 2.9 1975 -6.5 -3.3 -1.8 4.4 6.7 8.4 7.6 8.5 5.9 2.8 -0.9 -3.6 2.4 1976 -2.9 -4.3 -1.3 3.9 5.5 9.4 6.4 6.1 8.0 4.4 0.3 -1.4 2.8 1977 -6.5 -1.9 1.6 1.2 5.3 6.5 4.3 6.0 5.9 2.5 0.1 -2.5 1.9 1978 -4.5 -3.0 -0.8 0.9 3.8 6.1 5.9 5.7 3.5 2.1 -2.9 -2.0 1.2 1979 -2.6 -1.8 -1.9 4.1 2.5 5.7 5.9 3.5 4.6 3.0 -2.1 -3.4 1.5 1980 -4.2 -4.5 -1.0 1.5 2.1 5.2 5.6 4.9 4.5 1.3 0.8 -2.6 1.1 1981 -3.3 -3.2 -0.7 -0.4 2.3 4.5 5.6 5.2 3.5 0.5 -1.9 -3.2 0.7 1982 -5.4 -6.7 -3.5 2.3 3.3 6.0 6.6 ****** 3.2 ****** ****** ****** ****** 1983 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** 5.7 2.5 1.4 -3.3 -3.6 ****** 1988 -5.9 -4.8 -3.1 -0.2 -0.8 -0.5 3.2 2.1 0.0 0.1 -5.8 -7.2 -1.9 1989 -10.0 -10.6 -1.6 -1.1 1.5 2.7 4.2 2.4 0.5 -0.9 -1.1 -3.6 -1.5 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 -3.7 -6.2 -0.5 -1.8 -0.2 1.3 4.6 4.0 2.5 ****** ****** ****** ****** 1992 -9.1 -8.5 -5.6 -0.1 5.1 4.7 4.2 5.2 1.5 -0.8 -2.8 -3.6 -0.8 1993 -6.1 -3.6 -4.9 0.4 2.8 0.3 3.4 1.5 -2.2 -4.6 -2.4 -4.1 -1.6 1994 -4.2 -6.5 -3.3 -0.5 0.6 -0.3 4.5 0.9 -3.4 3.1 -1.0 -8.7 -1.6 1995 -5.9 -5.0 -6.3 1.3 3.6 4.8 6.3 -0.5 1.9 -1.7 -6.0 -4.5 -1.0 1996 -6.6 -1.1 -0.5 3.3 8.4 5.6 4.8 3.5 2.7 0.3 -3.9 -5.6 0.9 1997 -6.5 -12.3 -5.0 -2.7 2.1 5.7 7.1 1.4 1.7 1.9 -1.0 -2.1 -0.8 1998 -4.6 -3.8 -2.2 0.8 4.9 0.9 4.0 3.2 0.5 -0.9 -5.7 -5.3 -0.7 1999 -4.0 -6.2 -4.5 0.6 -1.5 -2.0 3.6 2.7 1.6 -2.1 -1.3 -4.6 -1.5 2000 -8.2 -7.7 -7.7 -1.0 1.7 1.3 2.2 0.9 2.5 2.9 0.3 -1.3 -1.2 MEAN -5.1 -4.4 -1.9 1.2 3.7 4.8 6.5 5.9 4.4 2.1 -1.1 -3.5 1.1 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 27 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 ****** ****** ****** 4.24 4.99 5.25 9.45 14.08 17.24 ****** ****** ****** ****** 1965 ****** ****** ****** ****** 7.49 5.89 7.29 7.70 6.52 6.95 4.64 4.19 ****** 1966 4.04 4.12 4.61 5.20 5.55 8.57 6.36 12.14 6.51 6.65 5.32 3.96 6.09 1967 4.55 4.39 4.42 5.14 6.05 7.12 13.77 13.23 8.70 7.17 6.66 ****** ****** 1968 3.82 ****** 4.12 6.21 7.17 8.29 8.76 9.87 8.63 6.27 5.36 4.07 ****** 1969 3.71 4.52 5.00 5.95 7.08 6.97 6.65 7.64 8.40 8.14 4.83 5.11 6.17 1970 4.22 4.77 4.90 6.27 7.87 7.06 10.10 9.11 8.67 7.78 4.99 4.16 6.66 1971 4.18 4.35 6.28 5.75 8.02 8.55 8.84 8.07 8.99 6.90 5.78 4.14 6.65 1972 2.85 3.13 5.02 6.50 8.15 9.73 10.98 9.50 8.31 6.22 5.03 ****** ****** 1973 ****** 4.75 5.03 5.41 7.28 8.95 10.49 8.48 7.96 5.71 4.36 3.26 ****** 1974 2.56 3.22 5.81 5.48 7.62 9.97 10.78 9.72 8.23 5.79 4.69 3.63 6.46 1975 3.09 3.82 4.24 6.65 7.65 8.62 8.16 8.72 7.24 5.98 4.54 3.73 6.04 1976 3.94 3.57 4.40 6.36 7.06 9.14 7.54 7.45 8.37 6.53 4.97 4.39 6.14 1977 3.06 4.18 5.37 5.19 7.04 7.58 6.36 7.26 7.20 5.75 4.84 3.99 5.65 1978 3.50 3.83 4.53 5.11 6.24 7.44 7.20 7.14 6.12 5.52 3.90 4.21 5.40 1979 3.95 4.19 4.24 6.46 5.72 7.06 7.17 6.06 6.72 5.94 4.11 3.79 5.45 1980 3.53 3.44 4.48 5.31 5.54 6.79 6.99 6.69 6.53 5.20 5.07 3.98 5.30 1981 3.76 3.77 4.54 4.62 5.55 6.50 7.00 6.82 6.07 4.89 4.20 3.80 5.13 1982 3.22 2.90 3.70 5.58 6.00 7.20 7.48 ****** 5.94 ****** ****** ****** ****** 1983 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** 7.02 5.63 5.36 3.77 3.71 ****** 1988 3.12 3.40 3.92 4.90 4.58 4.61 6.15 5.66 4.85 4.89 3.31 2.87 4.36 1989 2.27 2.28 4.29 4.49 5.37 5.75 6.39 5.67 5.02 4.52 4.55 3.74 4.53 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.72 3.22 4.78 4.26 4.76 5.24 6.59 6.35 5.70 ****** ****** ****** ****** 1992 2.58 2.61 3.38 4.86 6.85 6.66 6.47 6.88 5.26 4.53 4.09 3.74 4.83 1993 3.05 3.79 3.47 5.10 5.82 4.87 6.09 5.32 4.09 3.48 4.17 3.53 4.40 1994 3.54 3.02 3.91 4.73 5.09 4.74 6.53 5.28 3.83 6.18 4.59 2.66 4.51 1995 3.13 3.38 3.25 5.47 6.30 6.69 7.46 4.61 5.45 4.25 3.17 3.45 4.72 1996 3.02 4.47 4.65 6.16 8.52 7.15 6.63 6.15 5.74 4.92 3.60 3.21 5.35 1997 2.97 2.02 3.44 4.15 5.63 7.14 7.89 5.22 5.31 5.44 4.49 4.10 4.82 1998 3.43 3.65 4.24 5.17 6.73 5.19 6.37 6.13 5.07 4.51 3.20 3.36 4.75 1999 3.68 3.08 3.54 5.11 4.31 4.15 6.30 5.73 5.31 4.08 4.43 3.50 4.43 2000 2.69 2.77 2.76 4.56 5.40 5.31 5.62 5.07 5.71 5.89 4.92 4.42 4.59 MEAN 3.40 3.59 4.36 5.35 6.37 6.91 7.74 7.57 6.85 5.71 4.54 3.80 5.52 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 28 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. AVERAGE OF VAPOUR PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 ****** ****** ****** 5.56 6.56 6.92 12.37 18.29 22.28 ****** ****** ****** ****** 1965 ****** ****** ****** ****** 9.80 7.75 9.60 10.12 8.56 9.09 6.06 5.46 ****** 1966 5.26 5.36 6.02 6.80 7.29 11.25 8.36 15.84 8.55 8.69 6.95 5.17 7.96 1967 5.92 5.71 5.78 6.72 7.93 9.35 17.94 17.22 11.37 9.37 8.68 ****** ****** 1968 4.98 ****** 5.38 8.11 9.39 10.88 11.52 12.93 11.31 8.22 6.99 5.30 ****** 1969 4.83 5.89 6.55 7.77 9.26 9.17 8.76 10.04 11.00 10.64 6.30 6.67 8.07 1970 5.48 6.22 6.39 8.21 10.31 9.30 13.24 11.96 11.35 10.17 6.54 5.41 8.71 1971 5.44 5.67 8.19 7.52 10.52 11.23 11.63 10.61 11.77 9.02 7.54 5.39 8.71 1972 3.70 4.07 6.54 8.49 10.64 12.73 14.36 12.42 10.86 8.13 6.56 ****** ****** 1973 ****** 6.19 6.57 7.08 9.52 11.73 13.73 11.12 10.43 7.48 5.69 4.24 ****** 1974 3.33 4.19 7.57 7.17 9.97 13.04 14.08 12.72 10.76 7.57 6.13 4.72 8.44 1975 4.02 4.98 5.53 8.68 10.02 11.31 10.73 11.43 9.50 7.83 5.93 4.85 7.90 1976 5.12 4.64 5.74 8.30 9.26 11.97 9.90 9.78 10.96 8.55 6.48 5.72 8.04 1977 3.97 5.45 7.02 6.79 9.22 9.96 8.38 9.55 9.46 7.53 6.32 5.19 7.40 1978 4.55 4.99 5.91 6.69 8.18 9.76 9.47 9.39 8.05 7.24 5.08 5.50 7.07 1979 5.15 5.46 5.54 8.45 7.50 9.27 9.44 7.98 8.82 7.78 5.37 4.94 7.14 1980 4.60 4.48 5.85 6.96 7.27 8.93 9.20 8.80 8.57 6.82 6.63 5.19 6.94 1981 4.90 4.92 5.94 6.05 7.30 8.55 9.21 8.99 7.98 6.41 5.50 4.96 6.72 1982 4.19 3.78 4.84 7.32 7.88 9.47 9.85 ****** 7.82 ****** ****** ****** ****** 1983 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** 9.25 7.41 7.00 4.93 4.83 ****** 1988 4.06 4.42 5.12 6.42 6.03 6.09 8.11 7.46 6.38 6.42 4.33 3.75 5.72 1989 2.95 2.96 5.60 5.88 7.06 7.59 8.43 7.49 6.62 5.94 5.94 4.87 5.94 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 4.83 4.19 6.22 5.59 6.25 6.91 8.69 8.37 7.50 ****** ****** ****** ****** 1992 3.36 3.40 4.40 6.35 8.95 8.75 8.53 9.05 6.93 5.95 5.35 4.86 6.32 1993 3.96 4.94 4.53 6.67 7.63 6.43 8.02 7.02 5.40 4.57 5.44 4.60 5.77 1994 4.61 3.93 5.10 6.21 6.69 6.26 8.62 6.97 5.04 8.07 6.00 3.47 5.91 1995 4.08 4.41 4.24 7.15 8.25 8.80 9.84 6.10 7.18 5.58 4.15 4.49 6.19 1996 3.92 5.81 6.05 8.05 11.15 9.40 8.73 8.11 7.56 6.45 4.71 4.19 7.01 1997 3.88 2.64 4.49 5.44 7.39 9.39 10.40 6.90 7.00 7.15 5.85 5.33 6.32 1998 4.46 4.75 5.53 6.77 8.83 6.85 8.40 8.07 6.67 5.92 4.19 4.39 6.24 1999 4.79 4.03 4.62 6.69 5.67 5.48 8.29 7.56 7.00 5.36 5.77 4.56 5.82 2000 3.51 3.61 3.62 5.99 7.11 7.01 7.42 6.69 7.52 7.70 6.40 5.75 6.03 MEAN 4.42 4.68 5.69 7.00 8.35 9.08 10.17 9.94 8.99 7.47 5.92 4.96 7.22 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 29 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. AVERAGE OF SATURATION DEFICIT PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 ****** ****** ****** 11.67 18.17 29.59 37.70 27.63 15.11 ****** ****** ****** ****** 1965 ****** ****** ****** ****** 15.65 25.11 29.09 27.61 21.73 12.02 7.08 3.93 ****** 1966 4.74 4.11 6.26 10.80 18.15 28.69 23.69 28.15 20.46 10.11 7.58 5.32 14.00 1967 2.79 2.90 9.45 10.04 16.92 23.81 24.60 27.05 20.32 11.16 5.12 ****** ****** 1968 3.50 ****** 5.92 10.11 15.88 23.24 30.64 24.33 22.43 14.48 5.61 4.38 ****** 1969 2.86 3.39 11.70 8.97 15.44 24.91 30.35 24.66 18.55 12.92 5.66 5.93 13.78 1970 2.31 4.59 6.00 13.84 17.41 29.55 27.56 31.10 17.25 12.10 9.57 3.44 14.56 1971 2.83 4.32 6.24 9.51 18.95 27.15 31.89 29.79 18.40 9.93 4.74 3.47 13.93 1972 1.57 1.87 3.70 9.54 9.03 18.17 20.58 16.28 15.64 11.31 5.09 ****** ****** 1973 ****** 4.91 6.03 11.59 14.63 22.27 23.92 23.63 19.09 14.67 6.89 3.97 ****** 1974 2.03 2.01 5.73 10.57 14.91 20.40 18.69 19.55 14.51 9.38 6.82 2.51 10.59 1975 2.65 3.56 6.68 8.39 14.56 22.56 31.45 23.20 19.15 12.29 5.50 2.62 12.72 1976 3.35 2.98 3.89 7.68 17.09 19.69 24.53 24.98 19.40 11.20 4.89 3.78 11.95 1977 1.82 5.32 8.64 10.09 15.02 23.32 29.08 27.38 19.81 11.78 5.71 3.75 13.48 1978 3.65 4.87 7.05 12.18 16.00 20.25 25.42 25.47 22.56 13.26 5.28 4.90 13.41 1979 4.34 4.71 6.15 11.92 13.04 21.05 30.05 23.01 20.26 13.00 7.46 3.80 13.23 1980 3.51 3.27 6.65 13.29 17.59 23.72 27.90 24.35 20.00 12.09 6.99 4.52 13.66 1981 3.53 4.42 8.42 12.09 17.41 22.78 27.67 28.83 21.69 11.79 9.21 6.22 14.50 1982 4.12 3.96 6.58 14.07 18.30 27.72 31.27 ****** 23.45 ****** ****** ****** ****** 1983 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1984 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1985 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1986 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1987 ****** ****** ****** ****** ****** ****** ****** 27.75 21.63 8.87 8.33 4.18 ****** 1988 2.90 3.66 7.39 11.04 21.41 28.84 31.86 29.58 23.56 14.00 9.69 6.16 15.84 1989 2.72 3.33 5.95 12.98 18.43 31.27 34.14 32.29 24.37 16.10 6.65 4.43 16.06 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 2.21 2.91 4.30 13.83 17.36 26.51 31.44 30.04 22.89 ****** ****** ****** ****** 1992 2.30 3.96 4.25 9.69 10.24 23.46 34.17 24.52 20.05 12.93 8.17 2.83 13.05 1993 2.08 3.08 5.91 11.00 15.80 28.73 30.48 30.05 27.18 12.98 5.70 4.66 14.80 1994 3.91 4.44 7.38 12.99 17.96 29.34 34.64 35.96 20.45 9.44 7.94 3.92 15.70 1995 4.83 4.79 8.22 10.13 15.38 23.38 35.13 38.11 22.64 13.36 9.78 2.57 15.69 1996 2.26 3.07 3.57 8.78 14.46 25.97 28.06 30.60 25.50 12.65 6.31 5.64 13.91 1997 4.75 5.74 5.69 12.11 16.90 25.26 35.41 36.66 22.56 15.18 5.56 3.03 15.74 1998 2.11 3.22 6.45 12.88 16.76 30.85 32.82 31.24 24.51 14.08 11.23 7.48 16.14 1999 2.63 6.66 6.89 11.20 22.87 33.33 29.45 32.69 23.89 16.78 5.70 4.52 16.38 2000 4.23 4.98 8.65 16.23 23.72 30.23 32.52 32.82 24.38 10.42 3.78 2.59 16.21 MEAN 3.09 3.97 6.54 11.31 16.63 25.52 29.55 28.04 21.04 12.42 6.83 4.24 14.10 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 30 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. AVERAGE OF RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 *** *** *** 36 29 21 26 42 62 *** *** *** *** 1965 *** *** *** *** 40 26 26 29 32 47 48 64 *** 1966 56 61 52 43 33 29 31 36 31 49 51 52 44 1967 69 69 40 44 36 29 43 40 36 49 68 *** *** 1968 60 *** 46 49 41 35 30 37 37 39 57 58 *** 1969 65 66 37 52 39 28 25 31 39 48 56 54 45 1970 72 60 56 39 41 26 35 30 42 47 43 65 46 1971 68 60 58 46 37 30 28 28 41 48 65 66 48 1972 68 68 68 51 58 45 45 47 46 46 62 *** *** 1973 *** 62 57 42 43 38 41 35 42 39 53 57 *** 1974 63 69 64 48 44 42 47 44 47 49 52 68 53 1975 62 61 51 54 44 35 28 36 37 43 56 67 48 1976 63 64 63 56 40 40 32 32 41 49 60 64 50 1977 70 56 50 46 43 34 25 29 37 45 57 62 46 1978 60 57 52 41 39 36 32 31 32 40 55 57 44 1979 60 58 53 46 41 34 26 29 33 41 48 61 44 1980 62 62 51 38 34 30 29 31 35 41 52 58 44 1981 62 57 46 38 33 30 27 27 31 41 42 49 40 1982 55 54 47 38 33 28 27 *** 28 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 26 27 52 42 57 *** 1988 60 61 44 40 24 19 22 22 23 34 33 40 35 1989 55 49 52 33 31 21 21 20 24 29 49 54 37 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 70 61 61 31 30 22 23 23 27 *** *** *** *** 1992 61 49 54 43 53 29 21 29 27 33 41 67 42 1993 71 64 47 42 36 20 22 21 18 28 53 53 40 1994 58 50 45 35 30 19 22 17 21 49 45 48 37 1995 47 50 37 45 39 30 23 15 26 32 32 66 37 1996 67 71 68 52 48 29 25 22 24 36 45 44 44 1997 48 32 48 33 33 28 24 17 25 34 53 67 37 1998 70 65 51 38 38 20 22 23 23 34 29 40 38 1999 67 40 45 39 22 16 25 20 24 27 54 53 36 2000 48 46 32 28 24 21 19 18 25 47 65 71 37 MEAN 62 58 51 42 37 29 28 29 33 41 51 58 43 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 31 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. AVERAGE OF MAXIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 *** *** *** 50 42 32 38 61 79 *** *** *** *** 1965 *** *** *** *** 54 39 36 42 50 61 61 82 *** 1966 72 78 68 59 46 38 48 44 43 61 63 62 57 1967 80 81 51 54 47 38 53 50 48 63 83 *** *** 1968 78 *** 62 67 62 47 41 46 53 52 69 71 *** 1969 78 79 46 69 56 35 33 41 53 62 74 65 58 1970 83 73 68 50 54 31 45 40 54 57 52 76 57 1971 83 75 69 60 43 38 36 37 49 59 77 80 59 1972 78 78 80 66 75 61 63 62 66 62 79 *** *** 1973 *** 80 74 57 60 54 61 50 64 53 70 71 *** 1974 73 79 77 65 60 58 67 62 63 65 64 77 68 1975 74 72 66 69 59 43 42 47 51 59 69 75 61 1976 73 75 74 75 63 53 48 50 60 66 72 76 65 1977 82 72 68 68 64 50 37 44 54 67 76 78 63 1978 77 78 70 61 56 54 49 49 55 58 77 73 63 1979 77 75 75 64 62 50 37 47 47 58 70 79 62 1980 82 83 70 55 53 44 48 50 53 58 69 72 61 1981 79 75 63 55 47 41 39 43 45 62 61 66 56 1982 75 73 69 56 47 42 39 *** 42 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 35 38 64 53 72 *** 1988 69 74 56 52 33 27 30 29 30 43 44 48 45 1989 67 61 64 43 40 27 28 27 30 37 60 63 46 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 77 73 73 41 40 29 29 29 33 *** *** *** *** 1992 73 61 66 55 64 38 29 37 32 39 49 75 52 1993 77 73 59 53 46 27 31 29 24 35 63 62 48 1994 67 61 56 48 40 26 29 23 28 58 55 57 46 1995 57 63 49 57 49 40 29 19 32 40 38 75 46 1996 75 80 79 63 57 36 34 29 29 42 56 52 53 1997 57 40 60 46 43 35 30 22 30 42 64 77 46 1998 81 78 65 49 48 26 30 31 29 40 35 48 47 1999 77 50 55 49 29 22 34 26 30 33 63 63 44 2000 58 59 43 36 30 27 26 24 30 55 75 79 45 MEAN 74 71 65 56 51 39 39 40 45 53 63 69 55 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 32 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. AVERAGE OF MINIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 *** *** *** 24 18 12 15 26 45 *** *** *** *** 1965 *** *** *** *** 28 15 19 20 18 32 35 45 *** 1966 39 46 38 28 21 21 17 29 21 37 38 42 31 1967 58 56 31 34 25 19 34 31 22 32 55 *** *** 1968 43 *** 29 29 26 25 20 27 23 27 45 44 *** 1969 50 53 28 34 22 22 16 23 28 36 36 44 33 1970 58 46 45 30 30 21 25 21 32 38 32 53 36 1971 54 45 48 35 31 24 22 20 32 39 53 50 38 1972 59 55 55 39 44 32 31 34 29 31 44 *** *** 1973 *** 45 42 29 29 25 27 25 24 23 34 42 *** 1974 52 58 52 32 32 30 33 31 34 36 39 58 41 1975 50 51 36 40 33 28 18 27 27 31 43 59 37 1976 53 54 53 42 25 31 19 20 29 36 50 53 39 1977 61 42 36 32 29 21 16 19 26 32 41 49 34 1978 46 41 36 27 26 24 20 19 18 28 39 45 31 1979 44 44 38 32 27 21 19 19 24 30 31 47 31 1980 45 47 38 24 20 21 18 19 23 29 41 46 31 1981 50 44 33 26 24 22 20 18 22 27 29 38 29 1982 44 42 35 27 24 20 19 *** 20 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 21 20 42 32 45 *** 1988 52 52 36 31 18 13 17 16 19 27 24 32 28 1989 44 40 41 25 24 16 16 15 19 23 40 43 29 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 62 51 50 24 23 17 19 18 23 *** *** *** *** 1992 49 40 43 34 44 23 16 24 23 27 33 59 35 1993 64 54 38 34 28 16 16 15 13 21 43 44 32 1994 49 41 35 25 22 14 16 13 15 40 36 38 29 1995 38 40 28 35 32 23 19 11 22 25 25 58 30 1996 58 62 59 42 40 24 19 18 21 30 36 36 37 1997 39 26 39 24 25 23 20 13 21 28 44 56 30 1998 59 54 41 30 31 15 17 17 18 28 23 34 31 1999 58 32 38 31 16 11 19 16 20 22 45 43 29 2000 39 36 24 22 20 16 15 14 21 40 56 62 30 MEAN 51 46 39 31 27 21 20 21 24 31 39 47 33 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 33 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 1964 *** *** 0 1 0 0 0 0 0 *** *** *** *** 1965 *** *** *** 0 0 0 0 0 0 0 0 0 *** 1966 2 1 0 0 1 0 0 0 0 0 0 0 4 1967 0 1 0 1 0 0 0 0 0 0 1 0 3 1968 1 *** 0 2 4 0 0 0 0 0 1 1 *** 1969 3 0 0 0 0 0 0 0 0 0 0 2 5 1970 2 2 1 2 2 0 0 0 0 0 0 1 10 1971 1 1 3 4 0 0 0 0 0 0 4 0 13 1972 3 4 4 2 2 1 0 0 0 0 0 *** *** 1973 *** 0 3 0 0 0 0 0 0 0 0 0 *** 1974 3 2 0 1 1 0 0 0 0 0 1 3 11 1975 5 0 0 3 3 0 0 0 0 0 3 2 16 1976 0 6 3 4 0 1 0 0 0 2 1 1 18 1977 3 0 1 2 2 0 0 0 0 0 2 1 11 1978 0 0 1 0 1 0 0 0 0 0 1 2 5 1979 2 0 2 0 2 1 0 0 0 0 0 4 11 1980 3 2 1 0 1 0 0 0 0 1 1 2 11 1981 1 3 1 1 0 2 0 0 0 2 0 0 10 1982 0 0 3 0 0 0 0 *** 0 *** *** *** *** 1983 *** *** *** *** *** *** *** *** *** *** *** *** *** 1984 *** *** *** *** *** *** *** *** *** *** *** *** *** 1985 *** *** *** *** *** *** *** *** *** *** *** *** *** 1986 *** *** *** *** *** *** *** *** *** *** *** *** *** 1987 *** *** *** *** *** *** *** 0 0 1 0 2 *** 1988 1 7 2 1 0 0 0 0 0 2 0 0 13 1989 0 2 3 0 0 0 0 0 0 0 4 3 12 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 2 5 0 0 0 0 0 0 *** *** *** *** 1992 3 1 4 3 5 0 0 0 0 0 0 2 18 1993 2 4 3 2 1 0 0 0 0 0 1 0 13 1994 1 2 3 0 1 0 0 0 0 0 2 0 9 1995 0 3 1 4 4 1 0 0 0 0 0 2 15 1996 3 4 8 0 1 0 0 0 0 0 0 1 17 1997 0 0 3 1 0 0 0 0 0 1 0 3 8 1998 2 3 6 0 2 0 0 1 0 1 0 0 15 1999 2 0 4 1 0 0 0 0 0 0 2 2 11 2000 2 1 0 0 0 0 0 0 0 1 2 3 9 MEAN 2 2 2 1 1 0 0 0 0 0 1 1 10 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 34 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. HIGHEST AND LOWEST LIMITS FOR 37 YEARS DURING 1964-2000 ELE- JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MENT --------------------------------------------------------------------------------------------- NO. HIG. DRY 03 14.2 12.8 18.5 22.6 27.0 31.8 36.0 34.5 32.1 24.4 16.8 15.0 1 YEAR - DAY 1994- 4 1996-10 1969-27 1970-18 1970-24 1989-30 1964-15 1964- 6 1964- 8 1969- 1 1995-10 1969- 1 LOW. DRY 03 -14.6 -14.4 -10.5 -6.3 3.6 10.0 11.5 9.8 5.2 -1.0 -5.6 -11.0 2 YEAR - DAY 1977- 8 1972- 4 1968-17 1968- 8 1979- 1 1977- 1 1966-15 1972-30 1981-25 1977-24 1978-20 1974-29 HIG. WET 03 7.4 7.8 13.4 13.7 20.0 20.2 22.0 30.0 30.0 17.4 10.1 11.2 3 YEAR - DAY 1994- 4 1998- 8 1971-29 1968-20 1965-22 1966- 5 1967-15 1964-31 1964- 2 1970- 3 1965- 1 1969- 4 LOW. WET 03 -15.0 -16.0 -12.9 -9.5 1.4 5.0 7.0 7.0 2.4 -2.0 -6.6 -12.0 4 YEAR - DAY 1977- 8 1972- 4 1968-17 1968- 8 1979- 1 1977- 1 1966- 3 1972-27 1981-25 1977-24 1999-30 1974-29 HIG. DRY 09 18.0 20.0 25.0 30.0 33.0 37.6 38.5 39.6 40.6 31.0 26.0 18.0 5 YEAR - DAY 1979- 5 1973-18 1977-20 1973-26 1975-30 1970-29 1964-15 1964-22 1964- 1 1969- 1 1974- 3 1976-10 LOW. DRY 09 -7.2 -9.6 -5.8 2.0 4.8 19.0 21.0 19.8 16.6 3.0 0.0 -5.0 6 YEAR - DAY 1996-12 1972- 4 1992-10 1967- 1 1992- 2 1965- 5 1970-24 1992-30 1989-22 1987-27 1975-29 1974-27 HIG. WET 09 9.6 11.0 15.4 18.0 24.0 24.4 25.0 29.0 29.8 20.0 15.5 12.4 7 YEAR - DAY 1979- 4 1973-19 1974-23 1969- 1 1970-26 1970-28 1974- 2 1967-26 1964- 1 1967-13 1967- 1 1978-11 LOW. WET 09 -8.2 -12.0 -6.0 0.0 4.4 9.8 12.2 12.2 8.2 2.8 -2.6 -7.4 8 YEAR - DAY 1992-29 1972- 4 1992-10 1976- 5 1992- 2 2000-13 1994- 1 1977-20 1994-21 1987-27 1993-14 1994- 7 HIG. DRY 15 14.2 15.0 21.3 26.6 32.0 37.1 39.0 37.2 37.7 28.0 20.2 15.2 9 YEAR - DAY 1994- 4 1966-27 1967-27 1998-17 2000-26 1964-30 1964-15 1994-11 1964- 1 1968- 1 1970- 1 1996-29 LOW. DRY 15 -12.0 -9.8 -4.4 3.0 6.8 17.2 16.0 17.0 15.0 3.6 -0.6 -9.0 10 YEAR - DAY 1992-25 1991-13 1992-10 1976- 5 1992- 2 1972- 9 1974-21 1969-31 1974-29 1987-27 1999-30 1974-31 HIG. WET 15 9.5 10.6 14.4 18.2 20.0 23.5 29.8 28.2 29.1 17.0 12.5 8.4 11 YEAR - DAY 1966-31 1973-17 1998-24 1968-20 1965-22 1967-30 1964-28 1966-23 1964- 5 1969- 1 1966-13 1969- 1 LOW. WET 15 -12.7 -11.0 -6.5 -0.4 4.8 8.2 9.8 9.4 7.8 2.6 -3.8 -10.0 12 YEAR - DAY 1992-29 1972- 2 1992-10 1997-11 1989- 1 1964- 4 1966-14 1972-31 1994-21 1987-29 1993-14 1967-31 HIG. MIN. 9.0 12.2 15.8 18.4 23.0 27.0 32.4 28.8 28.0 19.8 14.0 12.8 13 YEAR - DAY 1994- 4 1998- 8 2000-24 1998-16 1989-26 1989-27 1989-14 1964- 7 1964- 1 1997- 3 1995- 2 1998- 1 LOW. MIN. -18.0 -17.5 -13.0 -12.5 1.5 6.0 7.5 4.5 3.5 -3.0 -7.0 -13.5 14 YEAR - DAY 1974-14 1972- 4 1976- 2 1968- 8 1979- 1 1973- 1 1975- 3 1972-29 1972-23 1977-24 1973-26 1974-29 HIG. MAX. 19.0 22.0 28.0 31.5 35.0 38.5 39.6 42.5 42.2 32.0 27.5 20.0 15 YEAR - DAY 1979- 5 1973-19 1969-15 1973-28 1965-27 1970-29 1964-13 1964-21 1964- 1 1973- 8 1974- 3 1965- 1 LOW. MAX. -6.6 -5.0 -3.5 5.0 11.0 21.6 25.5 22.0 19.0 7.0 1.0 -4.0 16 YEAR - DAY 1996-12 1972- 4 1992-11 1967- 1 1992- 2 1995- 1 1978- 7 1992-30 1989-22 1987-30 1975-29 1974-27 HIG. PPTN 20.0 30.0 35.0 30.0 28.0 8.0 3.0 5.0 0.3 33.0 37.0 37.1 17 YEAR - DAY 1980-17 1998-10 1996- 4 1977- 2 1979- 7 1976- 6 1999-28 1998- 4 1993-27 2000- 4 2000- 6 1989- 4 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 35 STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. HIGHEST LIMITS OF ABSOLUTE DIFFERENCES FOR 37 YEARS DURING 1964-2000 ELE- JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MENT --------------------------------------------------------------------------------------------- NO. DRY 09 - DRY 03 19.4 21.0 26.5 20.0 26.0 19.2 21.1 19.4 20.8 21.6 21.0 22.5 18 YEAR - DAY 1979-13 1973- 6 1968-17 1973-26 1977-15 1977-26 1966-30 1973-12 1973-14 1975-15 1979-21 1968- 1 DRY 15 - DRY 09 11.8 17.0 11.0 14.0 15.9 14.4 16.0 13.0 13.0 13.4 14.0 16.0 19 YEAR - DAY 1966-22 1973- 5 1977- 2 1969-24 1964-25 1973-24 1969-22 1973-11 1973-12 1973-17 1974- 4 1973- 2 DRY 15 - DRY 03 14.5 14.2 23.7 18.6 20.0 14.6 17.0 17.2 18.5 18.0 15.0 22.5 20 YEAR - DAY 1968- 1 1976-18 1968-19 1968- 8 1977-15 1980-13 1968-12 1981- 2 1968-26 1967-23 1975- 8 1968- 1 WET 09 - WET 03 16.0 17.2 24.9 16.7 14.0 11.8 11.7 12.2 13.0 13.2 14.0 17.7 21 YEAR - DAY 1968-15 1974- 6 1968-17 1968- 8 1977-15 1977- 2 1966- 3 1966-24 1975-26 1974-30 1973-11 1968- 1 WET 15 - WET 09 10.0 11.0 7.4 9.6 9.4 8.4 12.3 9.4 12.8 10.0 9.4 13.0 22 YEAR - DAY 1974-16 1973- 5 1973-26 1969- 1 1973-17 1972-16 1964-28 1964-11 1967- 2 1967-18 1971- 4 1974-31 WET 15 - WET 03 15.0 12.0 21.6 18.9 10.0 11.0 12.0 14.0 11.5 10.8 11.0 17.7 23 YEAR - DAY 1968-15 1976-18 1968-19 1968- 8 1969-26 1966-15 1967- 8 1966-26 1968-21 1975- 4 1973- 9 1968- 1 DAY BY DAY DRY 03 11.6 11.6 12.2 16.8 10.0 10.3 10.1 12.0 9.1 9.6 13.0 15.0 24 YEAR - DAY 1977- 8 1999-22 1995-27 1968- 9 1977-16 1965-11 1966- 1 1964- 8 1964-11 1996-28 1973-25 1988-30 DAY BY DAY WET 03 11.6 10.8 10.2 16.0 10.0 9.8 9.6 13.0 9.1 6.4 10.0 14.2 25 YEAR - DAY 1977- 8 1976-12 1972- 6 1968- 9 1965-22 1966- 6 1966- 1 1964- 8 1964- 9 1996-31 1988-15 1968- 1 DAY BY DAY DRY 09 11.2 10.4 11.6 15.0 11.6 10.7 10.8 7.4 12.4 11.0 17.0 14.2 26 YEAR - DAY 1994- 5 1992-25 1991-25 1975-15 1994- 6 1965- 1 1966-24 1974-31 1981-23 1976-30 1975-29 1978- 3 DAY BY DAY WET 09 9.0 12.0 8.2 9.0 9.8 7.0 7.8 8.0 7.8 9.5 12.0 8.4 27 YEAR - DAY 1974-21 1972- 5 1989-30 1975-15 1965-22 1966-19 1970- 6 1967- 1 1972- 1 1967-13 1975-29 1974-28 DAY BY DAY DRY 15 17.0 10.2 10.4 12.4 12.4 9.2 11.0 10.8 10.9 12.4 14.2 13.6 28 YEAR - DAY 1968- 1 1967- 4 1997- 8 1974-27 1977-25 1974- 1 1978- 8 1998- 3 1964-26 1989- 8 1993-14 1993- 1 DAY BY DAY WET 15 16.5 8.4 9.2 7.3 9.2 9.0 9.9 12.0 9.5 7.0 10.2 10.2 29 YEAR - DAY 1968- 1 1972-19 1998-24 1966-27 1966- 1 1969- 1 1964-23 1967- 1 1964-29 1996-31 1992-26 1988-27 DAY BY DAY MIN. 10.5 14.0 10.5 23.0 8.0 8.5 9.5 8.5 10.0 7.2 13.8 13.5 30 YEAR - DAY 1977- 8 1976-12 1988- 6 1968- 9 1965- 9 1994- 5 1975- 1 1974-19 1964-14 1996-28 1992-26 1968- 1 DAY BY DAY MAX. 10.0 13.0 12.6 14.0 10.5 8.1 10.0 6.1 6.5 12.0 16.5 12.5 31 YEAR - DAY 1982-16 1967- 4 1997- 8 1975-15 1991- 4 1965-21 1966-31 1964-17 1975-24 1976-30 1975-29 1978- 3 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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.***** ***** ***** 13.8 ***** ***** 30.2 29.2 24.4 ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** 7.0 13.2 17.2 22.7 21.8 16.7 ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** 20.6 ***** ***** 37.8 36.7 32.1 ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** 13.6 ***** ***** 15.1 14.9 15.4 ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** 4.28 5.89 6.14 9.13 15.40 16.31 ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** 4.18 4.91 5.24 7.78 13.68 18.25 ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** 4.27 4.18 4.36 11.43 13.15 17.15 ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** 1.6 7.6 12.1 15.0 14.2 8.2 ***** ***** ***** ****** DAY ** ** ** 15 3 21 3 14 18 ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** 26.6 ***** ***** 39.6 42.5 42.2 ***** ***** ***** ****** DAY ** ** ** 28 ** ** 13 21 1 ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** 3.3 13.2 3.3 0.0 0.0 0.0 0.0 ***** ***** ***** ****** DAY ** ** 21 17 29 ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** 3.3 14.0 3.3 0.0 0.0 0.0 0.0 ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 16.0 84.0 0.0 ***** NO. OF DAYS WITH PRECIPITATION. *** *** 1 2 1 0 0 0 0 *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL *** *** 1 1 1 0 0 0 0 *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** 0 1 0 0 0 0 0 *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** 44 38 31 33 50 64 *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** 27 22 16 18 31 58 *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** 37 26 16 27 45 64 *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** 0 0 0 0 0 0 *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** 0 0 2 22 15 8 *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** 0 *** *** 0 0 0 *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** 0 *** *** 31 31 19 *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** 0 *** *** 0 5 1 *** *** *** *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** 0 *** *** 0 0 0 *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** 0 0 0 0 0 0 *** *** *** *** DATE OF START AND END FREEZING START = ** **** END = ** **** IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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.***** ***** ***** ***** 20.3 22.3 24.4 24.5 ***** ***** 11.0 6.8 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** 13.3 14.5 16.2 15.8 13.3 10.0 5.0 1.8 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** 27.5 30.2 32.6 33.1 ***** ***** 17.1 11.7 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** 14.2 15.7 16.4 17.3 ***** ***** 12.1 9.9 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** 7.87 6.65 7.57 8.19 7.38 7.14 4.42 4.35 ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** 7.50 6.29 7.90 7.12 6.27 7.10 4.52 3.69 ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** 7.09 4.63 6.41 7.79 5.91 6.60 4.98 4.54 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** 6.2 11.2 14.0 13.0 10.2 8.3 1.0 -5.0 ****** DAY ** ** ** ** 2 21 1 11 18 25 25 13 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** 35.0 34.1 35.0 36.0 ***** ***** 20.8 20.0 ****** DAY ** ** ** ** 27 11 15 16 ** ** 1 1 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 ****** DAY ** ** ** ** ** ** ** ** ** ** ** 21 MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** 0.0 0.0 100.0 NO. OF DAYS WITH PRECIPITATION. *** *** *** 0 0 0 0 0 0 0 0 1 *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** 0 0 0 0 0 0 0 0 1 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** 0 0 0 0 0 0 0 0 0 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** 47 35 34 41 49 55 54 71 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** 38 27 24 21 22 35 38 47 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** 36 16 21 26 26 49 53 74 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** 0 0 0 0 0 0 0 1 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** 0 0 0 0 0 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** 0 0 0 0 *** *** 0 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** 12 20 30 30 *** *** 0 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** 0 0 0 0 *** *** 0 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** 0 0 0 0 *** *** 0 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** 0 0 0 0 0 0 0 6 *** DATE OF START AND END FREEZING START = 3 DEC. END = 20 DEC. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 7.0 5.8 10.8 13.7 18.4 24.6 21.5 26.7 22.1 16.4 12.4 8.6 15.7 AVERAGE OF MINIMUM TEMPERATURE IN C. 1.2 1.8 4.7 8.8 11.5 15.3 11.1 17.8 14.5 10.4 7.8 3.9 9.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. 12.7 9.8 17.0 18.7 25.2 34.0 31.9 35.6 29.6 22.4 17.0 13.2 22.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.5 8.0 12.3 9.9 13.7 18.7 20.8 17.8 15.1 12.0 9.2 9.3 13.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.58 4.25 4.39 4.70 5.60 7.05 6.20 8.28 6.48 6.45 5.21 3.64 5.49 MEAN OF MIXING RATIO AT 09 GMT. 3.86 3.94 4.50 4.50 5.02 9.11 7.08 13.51 7.30 6.71 5.29 4.52 6.28 MEAN OF MIXING RATIO AT 15 GMT. 4.66 4.15 4.95 6.41 6.05 9.55 5.80 14.62 5.76 6.79 5.46 3.72 6.49 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -0.2 -0.3 -0.8 5.0 7.0 10.5 7.8 14.0 9.5 7.0 3.8 1.0 -0.8 DAY 8 1 6 1 5 6 11 29 9 24 29 25 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 15.3 15.4 21.0 25.6 32.0 37.0 38.0 38.2 34.0 26.4 20.2 18.0 38.2 DAY 19 27 9 20 24 14 30 22 11 8 1 4 24 HOUR MAXIMUM PRECIPITATION IN MM. 7.0 7.0 3.5 2.0 5.0 0.0 0.0 0.0 0.0 3.0 0.0 0.0 7.0 DAY 13 2 2 26 1 ** ** ** ** 22 ** ** MONTHLY TOTAL PRECIPITATION IN MM. 12.0 12.0 3.5 2.0 5.0 0.0 0.0 0.0 0.0 5.7 0.0 0.0 40.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 68.4 17.4 0.0 14.2 NO. OF DAYS WITH PRECIPITATION. 2 3 1 1 1 0 0 0 0 2 0 0 10 NO. OF DAYS PRECIPITATION EQUAL 2 3 1 1 1 0 0 0 0 2 0 0 10 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. 58 72 61 49 40 33 48 39 41 59 61 56 51 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 46 51 43 31 24 27 22 32 27 39 50 46 37 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 63 61 52 48 36 28 24 37 25 51 42 53 43 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 0 0 2 0 0 0 0 2 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 30 22 31 13 0 0 0 105 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. 5 14 5 0 0 0 0 0 0 0 0 0 24 DATE OF START AND END FREEZING START = 8 JAN. END = 6 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 5.1 ***** 12.0 13.2 18.8 23.3 27.2 28.8 ***** 17.0 12.1 ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. 2.5 ***** 7.0 8.2 11.5 17.1 20.8 22.2 14.4 8.1 5.9 -4.8 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 7.8 9.4 17.0 18.2 26.1 29.5 33.6 35.4 ***** 25.9 18.2 ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 5.3 ***** 10.0 10.0 14.6 12.4 12.8 13.2 ***** 17.8 12.3 ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 4.65 3.85 4.27 5.07 5.83 7.20 11.58 10.53 8.15 5.80 6.23 2.34 6.29 MEAN OF MIXING RATIO AT 09 GMT. 4.76 4.42 4.24 5.38 5.76 5.46 14.05 17.25 11.98 8.48 7.25 ***** ***** MEAN OF MIXING RATIO AT 15 GMT. 4.24 4.89 4.74 4.95 6.56 8.70 15.66 11.91 5.96 7.23 6.51 2.19 6.96 ABSOLUTE OF MINIMUM TEMPERATURE IN C. 1.0 ***** -1.0 -3.0 6.2 13.5 16.5 17.0 10.0 3.0 2.0 -7.5 ****** DAY 5 ** 12 1 1 1 21 1 27 23 15 19 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.5 15.1 22.4 25.0 32.5 33.0 37.0 38.0 ***** 29.0 24.5 ***** ****** DAY 31 2 27 23 29 30 31 9 ** 3 3 ** 24 HOUR MAXIMUM PRECIPITATION IN MM. 1.0 8.0 0.0 7.0 0.0 0.0 0.0 0.0 0.0 0.0 7.0 0.0 8.0 DAY 3 13 ** 15 ** ** ** ** ** ** 13 ** MONTHLY TOTAL PRECIPITATION IN MM. 2.0 8.0 0.0 8.5 0.0 0.0 0.0 0.0 0.0 0.0 7.0 0.0 25.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 39.2 33.3 0.0 27.5 NO. OF DAYS WITH PRECIPITATION. 2 1 0 2 0 0 0 0 0 0 1 0 6 NO. OF DAYS PRECIPITATION EQUAL 2 1 0 2 0 0 0 0 0 0 1 0 6 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. 77 72 47 50 42 36 46 42 43 56 74 62 54 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 67 65 37 42 26 19 39 46 39 45 65 *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 62 68 38 39 40 32 43 32 28 47 67 61 46 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 *** 0 0 0 0 0 0 0 0 0 21 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 *** 0 0 0 1 14 23 0 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 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 15 28 31 *** 0 0 *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 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 *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 0 *** 1 1 0 0 0 0 0 0 0 31 *** DATE OF START AND END FREEZING START = 1 DEC. END = 1 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 2.4 ***** 3.9 13.7 19.1 21.2 26.1 24.3 22.4 17.7 9.9 2.7 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -3.6 ***** -6.7 6.5 11.7 13.4 17.1 15.8 13.8 11.9 6.3 -5.3 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 8.4 ***** 14.6 20.9 26.2 29.0 35.1 32.8 31.0 23.5 13.5 10.8 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 12.0 ***** 21.3 14.4 14.5 15.6 18.0 17.0 17.2 11.6 7.2 16.1 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.58 ***** 1.29 5.52 7.74 8.30 7.92 7.85 7.16 6.07 4.93 2.61 ***** MEAN OF MIXING RATIO AT 09 GMT. 4.15 ***** 5.71 5.24 6.35 8.25 9.58 10.45 7.91 6.44 5.63 4.56 ***** MEAN OF MIXING RATIO AT 15 GMT. 4.74 ***** 5.38 7.89 7.43 8.32 8.78 11.31 10.77 6.29 5.52 5.04 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -6.5 ***** -11.0 -12.5 9.0 10.5 16.0 13.0 10.0 7.0 3.0 -7.5 ****** DAY 15 ** 15 8 1 2 12 15 19 30 23 1 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 12.0 ***** 18.5 29.1 30.0 36.0 38.0 36.2 33.5 28.0 17.0 15.0 ****** DAY 1 ** 10 20 21 30 2 17 4 1 3 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 5.0 ***** 0.0 15.0 19.0 0.0 0.0 0.0 0.0 0.0 11.0 7.0 ****** DAY 16 ** ** 2 27 ** ** ** ** ** 2 7 MONTHLY TOTAL PRECIPITATION IN MM. 5.0 ***** 0.0 27.0 39.0 0.0 0.0 0.0 0.0 0.0 11.0 7.0 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 5.6 74.2 0.0 20.2 NO. OF DAYS WITH PRECIPITATION. 1 *** 0 2 4 0 0 0 0 0 1 1 *** NO. OF DAYS PRECIPITATION EQUAL 1 *** 0 2 4 0 0 0 0 0 1 1 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 *** 0 2 1 0 0 0 0 0 1 0 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 64 *** 38 55 61 46 40 42 48 52 61 65 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 50 *** 46 32 27 28 25 28 24 30 49 47 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 67 *** 55 59 35 31 23 43 39 37 60 63 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 15 *** 29 8 0 0 0 0 0 0 0 29 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 *** 0 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** 0 0 0 0 0 0 0 0 0 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** 0 0 1 13 30 28 23 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. 31 *** 31 8 0 0 0 0 0 0 0 31 *** DATE OF START AND END FREEZING START = 1 DEC. END = 8 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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.***** ***** 14.4 ***** ***** ***** ***** ***** ***** ***** ***** 9.5 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** 9.4 9.1 13.1 15.5 16.6 15.7 15.0 13.4 ***** 5.7 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** 19.3 ***** ***** ***** ***** ***** ***** ***** ***** 13.2 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** 9.9 ***** ***** ***** ***** ***** ***** ***** ***** 7.5 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.88 3.62 4.99 5.20 6.83 6.89 6.24 7.76 7.51 8.45 4.93 5.08 5.86 MEAN OF MIXING RATIO AT 09 GMT. 4.15 5.11 5.06 6.08 7.06 7.76 6.85 7.60 8.06 8.15 4.29 5.25 6.28 MEAN OF MIXING RATIO AT 15 GMT. 4.12 4.84 4.95 6.57 7.36 6.26 6.86 7.56 9.63 7.82 5.27 5.01 6.35 ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** 7.2 2.0 10.4 13.0 14.0 11.0 12.0 9.5 ***** -2.0 ****** DAY ** ** 24 11 8 1 31 31 27 31 ** 30 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** 28.0 ***** ***** ***** ***** ***** ***** ***** ***** 17.5 ****** DAY ** ** 15 ** ** ** ** ** ** ** ** 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 13.0 0.0 0.0 4.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.0 13.0 DAY 22 ** ** 11 ** ** ** ** ** ** ** 3 MONTHLY TOTAL PRECIPITATION IN MM. 38.5 0.0 0.0 11.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 60.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 63.6 18.2 0.0 18.2 NO. OF DAYS WITH PRECIPITATION. 4 0 0 3 0 0 0 0 0 0 0 2 9 NO. OF DAYS PRECIPITATION EQUAL 4 0 0 3 0 0 0 0 0 0 0 2 9 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 0 0 0 0 0 0 0 0 0 0 0 3 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 68 69 40 52 50 34 26 40 45 61 67 55 51 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 53 59 35 36 31 24 17 23 28 42 36 49 36 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 75 70 36 66 37 27 31 31 45 42 66 59 49 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** 0 0 0 0 0 0 0 0 *** 0 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** 0 0 0 0 0 0 0 0 *** 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** 0 *** *** *** *** *** *** *** *** 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** 0 *** *** *** *** *** *** *** *** 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** 0 *** *** *** *** *** *** *** *** 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** 0 *** *** *** *** *** *** *** *** 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** 0 0 0 0 0 0 0 0 *** 2 *** DATE OF START AND END FREEZING START = 29 DEC. END = 30 DEC. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 2.9 7.7 8.9 16.5 20.3 25.2 27.3 27.7 21.1 17.3 11.8 4.2 15.9 AVERAGE OF MINIMUM TEMPERATURE IN C. -0.9 3.2 4.0 9.8 12.7 18.0 20.3 20.3 14.5 11.1 6.3 -0.3 9.9 AVERAGE OF MAXIMUM TEMPERATURE IN C. 6.7 12.1 13.8 23.3 28.0 32.3 34.2 35.0 27.8 23.5 17.3 8.7 21.9 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.6 8.9 9.8 13.5 15.3 14.3 13.9 14.7 13.3 12.4 11.1 9.0 12.0 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.52 4.33 4.78 5.21 7.74 6.61 9.85 8.88 8.64 6.92 4.73 3.63 6.24 MEAN OF MIXING RATIO AT 09 GMT. 4.57 5.12 4.90 6.18 7.70 7.35 10.39 9.78 8.08 8.72 4.62 4.54 6.83 MEAN OF MIXING RATIO AT 15 GMT. 4.56 4.87 5.01 7.42 8.18 7.22 10.07 8.66 9.28 7.69 5.64 4.30 6.91 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -5.5 -2.0 1.5 5.0 8.5 10.0 17.5 17.0 9.0 7.5 3.5 -5.0 -5.5 DAY 28 1 8 26 1 14 6 31 20 10 14 16 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 11.5 18.0 23.0 27.6 34.5 38.5 39.0 39.0 35.5 29.0 22.5 17.5 39.0 DAY 1 19 30 16 27 29 31 7 7 1 2 7 24 HOUR MAXIMUM PRECIPITATION IN MM. 10.0 7.0 6.0 8.0 9.0 0.0 0.0 0.0 0.0 0.0 0.0 16.0 16.0 DAY 22 5 16 28 1 ** ** ** ** ** ** 13 MONTHLY TOTAL PRECIPITATION IN MM. 25.0 12.5 21.1 22.1 19.3 0.0 0.0 0.0 0.0 0.0 0.0 16.0 116.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 50.5 35.7 0.0 13.8 NO. OF DAYS WITH PRECIPITATION. 5 2 5 4 3 0 0 0 0 0 0 1 20 NO. OF DAYS PRECIPITATION EQUAL 5 2 5 4 3 0 0 0 0 0 0 1 20 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 0 0 0 0 0 0 0 0 0 0 1 2 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 70 67 65 41 48 29 42 39 53 51 49 66 52 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 70 55 54 34 35 23 32 26 32 43 33 61 42 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 75 58 49 43 41 24 30 24 43 48 46 66 46 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 4 0 0 0 0 0 0 0 0 0 0 8 12 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 6 9 11 0 0 0 0 26 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 14 26 29 31 9 0 0 0 109 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 2 0 0 0 0 0 0 0 0 0 18 40 DATE OF START AND END FREEZING START = 2 DEC. END = 2 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 3.5 6.4 10.4 12.8 20.6 25.5 25.8 22.0 21.2 14.5 9.4 4.2 14.7 AVERAGE OF MINIMUM TEMPERATURE IN C. -1.5 2.3 6.3 7.0 13.7 18.3 17.2 10.1 13.7 6.5 4.2 -0.4 8.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. 7.3 10.5 14.6 18.6 27.6 32.7 34.3 34.0 28.7 22.4 14.6 8.9 21.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.8 8.2 8.3 11.6 13.9 14.5 17.1 23.9 15.0 15.9 10.4 9.3 13.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.97 4.50 5.58 5.30 7.65 8.29 8.45 7.62 8.06 6.41 5.09 3.63 6.21 MEAN OF MIXING RATIO AT 09 GMT. 4.37 3.93 6.87 5.99 8.44 8.70 8.81 8.16 9.34 7.32 6.16 4.87 6.91 MEAN OF MIXING RATIO AT 15 GMT. 4.19 4.61 6.38 5.95 7.97 8.65 9.28 8.42 9.58 6.98 6.11 3.91 6.83 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -6.5 -3.0 3.0 2.5 9.5 14.0 8.5 8.0 8.2 4.0 -2.0 -7.0 -7.0 DAY 20 14 3 5 2 5 26 3 25 26 14 21 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 14.4 16.5 19.4 23.5 30.5 36.5 37.6 36.5 34.0 27.0 19.5 14.6 37.6 DAY 5 27 26 27 16 26 8 17 1 1 4 12 24 HOUR MAXIMUM PRECIPITATION IN MM. 5.0 7.0 17.0 8.0 0.0 0.0 0.0 0.0 0.0 0.0 14.0 4.0 17.0 DAY 31 1 22 10 ** ** ** ** ** ** 10 14 MONTHLY TOTAL PRECIPITATION IN MM. 9.0 7.0 40.5 34.5 0.0 0.0 0.0 0.0 0.0 0.0 41.0 4.0 136.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 41.5 25.4 0.0 33.1 NO. OF DAYS WITH PRECIPITATION. 2 1 4 6 0 0 0 0 0 0 5 1 19 NO. OF DAYS PRECIPITATION EQUAL 2 1 4 6 0 0 0 0 0 0 5 1 19 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 2 0 0 0 0 0 0 0 2 0 4 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 77 72 55 50 41 36 33 33 46 53 69 74 53 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 61 48 59 42 33 27 24 23 36 43 55 60 43 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 66 61 61 48 36 27 27 27 41 49 72 64 48 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 7 0 0 0 0 0 0 0 0 0 0 8 15 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 6 13 0 0 0 0 0 19 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 29 8 0 0 0 99 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. 13 5 0 0 0 0 0 0 0 0 2 16 36 DATE OF START AND END FREEZING START = 14 NOV. END = 14 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. -3.0 -1.7 5.9 14.2 16.0 21.8 22.6 19.7 18.4 15.2 7.9 ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -8.9 -6.6 -0.4 5.8 8.5 11.3 10.3 7.3 5.6 4.7 0.2 ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.8 3.3 12.2 22.6 23.6 32.3 34.9 32.1 31.2 25.7 15.5 ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.7 9.9 12.6 16.8 15.1 21.0 24.6 24.8 25.6 21.0 15.3 ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.03 2.64 4.43 6.37 8.08 9.61 10.37 8.41 7.64 5.84 4.40 ***** ***** MEAN OF MIXING RATIO AT 09 GMT. 3.53 3.64 5.48 6.88 8.19 10.29 12.06 10.60 8.47 6.45 5.55 ***** ***** MEAN OF MIXING RATIO AT 15 GMT. 3.00 2.87 5.16 6.25 8.19 9.30 10.53 9.50 8.81 6.36 5.14 ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -14.5 -17.5 -7.0 2.0 4.5 8.5 8.5 4.5 3.5 4.0 -5.0 ***** ****** DAY 25 4 5 4 7 1 1 29 23 12 11 ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 8.2 12.5 16.5 27.5 30.0 37.0 38.0 34.5 36.0 29.5 23.5 ***** ****** DAY 18 15 15 23 27 22 5 11 3 3 3 ** 24 HOUR MAXIMUM PRECIPITATION IN MM. 14.0 20.0 22.0 7.0 8.0 5.0 0.0 0.0 0.0 0.0 0.0 ***** ****** DAY 30 20 3 24 22 9 ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. 33.4 54.0 75.0 12.0 19.0 5.0 0.0 0.0 0.0 0.0 0.0 ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 81.9 18.1 0.0 0.0 NO. OF DAYS WITH PRECIPITATION. 4 5 4 2 3 1 0 0 0 0 0 *** *** NO. OF DAYS PRECIPITATION EQUAL 4 5 4 2 3 1 0 0 0 0 0 *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 4 4 0 0 0 0 0 0 0 0 *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 64 68 77 65 74 61 62 62 64 62 77 *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 71 69 58 42 45 33 35 38 30 31 45 *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 70 64 67 44 54 41 38 41 45 46 63 *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 31 25 5 0 0 0 0 0 0 0 5 *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 2 9 0 0 0 0 0 0 0 0 0 *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 2 27 31 29 20 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. 31 29 14 0 0 0 0 0 0 0 15 *** *** DATE OF START AND END FREEZING START = 7 NOV. END = 29 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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.***** 7.6 8.6 13.2 16.6 22.4 25.1 23.5 20.9 16.4 8.0 3.1 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** -0.1 0.6 3.0 5.5 12.1 15.1 12.8 9.5 5.2 -0.7 -4.9 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** 15.3 16.6 23.4 27.6 32.7 35.2 34.3 32.3 27.6 16.7 11.1 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** 15.3 16.0 20.4 22.1 20.6 20.1 21.5 22.8 22.4 17.4 16.0 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** 4.37 4.45 4.99 7.49 9.82 11.34 7.71 8.08 5.16 3.71 2.39 ***** MEAN OF MIXING RATIO AT 09 GMT. ***** 5.27 5.94 5.84 7.61 9.12 11.00 10.27 8.58 6.22 4.67 4.22 ***** MEAN OF MIXING RATIO AT 15 GMT. ***** 4.61 4.71 5.40 6.74 7.92 9.13 7.45 7.23 5.75 4.70 3.17 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** -10.0 -6.0 1.0 3.0 6.0 10.5 8.5 4.0 2.0 -7.0 -12.0 ****** DAY ** 6 10 7 11 1 1 12 28 2 26 28 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** 22.0 23.0 31.5 32.0 37.5 39.5 37.5 36.5 32.0 25.0 17.0 ****** DAY ** 19 2 28 17 27 13 4 2 8 2 2 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** 0.0 19.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ****** DAY ** ** 16 ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. ***** 0.0 38.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 100.0 0.0 0.0 0.0 NO. OF DAYS WITH PRECIPITATION. *** 0 3 0 0 0 0 0 0 0 0 0 *** NO. OF DAYS PRECIPITATION EQUAL *** 0 3 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** 0 2 0 0 0 0 0 0 0 0 0 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** 79 72 54 59 54 60 49 64 52 65 63 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** 47 49 33 31 27 28 27 26 24 35 48 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** 61 50 38 40 34 35 30 36 40 59 61 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** 6 3 0 0 0 0 0 0 0 12 22 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** 0 0 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** 0 0 0 0 0 0 0 0 0 0 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** 0 0 3 8 26 31 31 24 10 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. *** 10 7 0 0 0 0 0 0 0 14 30 *** DATE OF START AND END FREEZING START = 8 NOV. END = 30 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. -2.8 -0.9 8.8 12.4 17.2 21.1 21.3 20.9 18.6 12.9 9.2 1.0 11.7 AVERAGE OF MINIMUM TEMPERATURE IN C. -8.8 -7.0 1.9 3.6 7.3 10.5 10.6 10.0 8.3 3.4 0.2 -5.4 2.9 AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.3 5.2 15.7 21.3 27.2 31.7 31.9 31.9 28.9 22.4 18.2 7.5 20.4 DIFFERENCE BETWEEN AVERAGE MAXIMUM 12.1 12.2 13.8 17.7 19.9 21.2 21.3 21.9 20.6 19.0 18.0 12.9 17.5 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.26 2.75 5.20 5.29 7.71 9.95 11.67 9.77 7.43 4.58 3.58 2.82 6.08 MEAN OF MIXING RATIO AT 09 GMT. 3.02 4.08 6.57 5.62 7.90 10.75 11.95 10.54 9.36 7.05 5.81 4.49 7.26 MEAN OF MIXING RATIO AT 15 GMT. 2.40 2.84 5.66 5.55 7.24 9.20 8.73 8.86 7.88 5.74 4.68 3.57 6.03 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -18.0 -15.0 -4.5 -1.0 4.5 7.5 8.0 6.0 5.0 1.0 -6.0 -13.5 -18.0 DAY 14 4 6 1 15 7 21 19 27 15 28 29 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 7.0 12.0 24.5 28.5 32.0 35.5 37.0 36.0 34.0 26.0 27.5 13.5 37.0 DAY 16 14 19 23 21 20 2 14 17 22 3 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 16.0 11.8 0.0 8.0 8.0 0.0 0.0 0.0 0.0 0.0 6.0 18.0 18.0 DAY 23 20 ** 11 17 ** ** ** ** ** 8 5 MONTHLY TOTAL PRECIPITATION IN MM. 48.0 31.8 0.0 8.0 8.0 0.0 0.0 0.0 0.0 0.0 6.0 43.0 144.8 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 55.1 11.0 0.0 33.8 NO. OF DAYS WITH PRECIPITATION. 5 7 0 1 1 0 0 0 0 0 1 3 18 NO. OF DAYS PRECIPITATION EQUAL 5 7 0 1 1 0 0 0 0 0 1 3 18 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 1 0 0 0 0 0 0 0 0 0 3 6 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 67 78 73 61 58 56 67 62 62 63 58 74 65 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 58 64 55 35 33 34 38 33 35 37 40 62 44 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 63 66 62 47 42 37 36 37 43 47 56 67 50 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 30 22 1 0 0 0 0 0 0 0 3 22 78 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 2 0 0 0 0 0 0 0 0 0 2 4 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 8 23 25 26 10 0 0 0 92 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 8 1 0 0 0 0 0 0 16 30 113 DATE OF START AND END FREEZING START = 9 NOV. END = 1 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. -0.5 2.5 7.5 13.0 16.9 23.1 22.0 24.6 21.0 13.4 6.8 1.1 12.6 AVERAGE OF MINIMUM TEMPERATURE IN C. -7.3 -5.1 -1.5 4.0 7.4 14.5 8.7 16.1 11.0 2.7 -0.8 -5.0 3.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 6.3 10.2 16.6 22.0 26.5 31.8 35.3 33.1 31.1 24.0 14.3 7.3 21.5 DIFFERENCE BETWEEN AVERAGE MAXIMUM 13.6 15.3 18.1 18.0 19.1 17.3 26.6 17.0 20.1 21.3 15.1 12.3 17.8 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.34 2.91 3.49 5.93 7.29 7.96 8.18 7.57 6.45 4.53 3.68 2.82 5.26 MEAN OF MIXING RATIO AT 09 GMT. 3.98 4.54 4.69 7.47 8.29 9.42 7.39 10.77 8.59 7.49 5.55 4.51 6.89 MEAN OF MIXING RATIO AT 15 GMT. 2.96 4.02 4.53 6.55 7.38 8.48 8.89 7.81 6.68 5.93 4.40 3.86 5.96 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -15.0 -12.0 -7.0 0.0 3.5 9.0 7.5 11.4 7.0 -2.5 -6.5 -12.0 -15.0 DAY 21 12 4 3 8 6 3 28 28 28 8 5 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 13.0 17.5 24.5 28.5 34.5 36.0 39.0 36.5 36.0 30.5 24.5 13.0 39.0 DAY 3 22 25 14 30 27 25 11 7 1 1 21 24 HOUR MAXIMUM PRECIPITATION IN MM. 10.0 4.0 0.0 24.4 14.0 0.0 0.0 0.0 0.0 0.0 15.0 25.0 25.0 DAY 23 3 ** 15 6 ** ** ** ** ** 16 3 MONTHLY TOTAL PRECIPITATION IN MM. 41.0 4.0 0.0 45.0 33.0 0.0 0.0 0.0 0.0 0.0 30.0 30.0 183.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 24.6 42.6 0.0 32.8 NO. OF DAYS WITH PRECIPITATION. 5 1 0 3 3 0 0 0 0 0 3 2 17 NO. OF DAYS PRECIPITATION EQUAL 5 1 0 3 3 0 0 0 0 0 3 2 17 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 0 0 3 2 0 0 0 0 0 2 1 9 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 69 70 65 67 58 42 42 47 51 59 68 73 59 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 59 54 38 44 36 29 18 30 28 36 49 62 40 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 58 60 50 53 39 33 25 30 30 35 50 66 44 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 29 22 15 0 0 0 0 0 0 0 4 21 91 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 1 0 0 0 0 1 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 23 31 29 22 1 0 0 114 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 25 18 1 0 0 0 0 0 8 21 30 134 DATE OF START AND END FREEZING START = 21 OCT. END = 3 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 1.9 0.6 4.6 12.1 17.8 21.8 23.8 22.7 20.5 13.9 6.7 4.0 12.5 AVERAGE OF MINIMUM TEMPERATURE IN C. -6.1 -6.6 -3.0 4.7 8.5 13.0 15.3 13.4 10.6 5.0 -0.3 -2.5 4.3 AVERAGE OF MAXIMUM TEMPERATURE IN C. 9.8 7.8 12.1 19.5 27.1 30.6 32.3 32.0 30.4 22.9 13.8 10.5 20.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 15.9 14.4 15.1 14.8 18.6 17.6 17.0 18.6 19.8 17.9 14.1 13.0 16.4 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.90 2.74 3.65 6.06 7.67 8.54 8.57 7.83 7.53 5.60 3.96 3.53 5.72 MEAN OF MIXING RATIO AT 09 GMT. 4.80 4.16 5.05 7.07 7.58 9.91 6.72 7.44 9.37 7.96 5.87 5.17 6.76 MEAN OF MIXING RATIO AT 15 GMT. 4.11 3.81 4.51 5.95 5.94 8.97 7.33 7.06 8.21 6.04 5.08 4.49 5.96 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -12.0 -17.0 -13.0 1.0 5.5 10.0 10.0 12.0 9.0 3.0 -6.0 -6.5 -17.0 DAY 12 17 2 6 8 9 2 16 9 25 20 1 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 13.5 18.0 20.0 26.5 31.0 35.0 36.0 36.0 34.0 28.0 21.0 19.5 36.0 DAY 17 8 31 17 31 29 12 1 3 1 5 15 24 HOUR MAXIMUM PRECIPITATION IN MM. 0.0 13.0 28.0 10.0 0.0 8.0 0.0 0.0 0.0 17.0 19.0 6.0 28.0 DAY ** 28 25 4 ** 6 ** ** ** 31 29 19 MONTHLY TOTAL PRECIPITATION IN MM. 0.0 54.0 56.0 33.0 0.0 8.0 0.0 0.0 0.0 27.0 19.0 10.0 207.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 53.1 19.8 0.0 27.1 NO. OF DAYS WITH PRECIPITATION. 0 7 3 4 0 1 0 0 0 2 1 2 20 NO. OF DAYS PRECIPITATION EQUAL 0 7 3 4 0 1 0 0 0 2 1 2 20 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 2 3 1 0 0 0 0 0 2 1 0 9 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 72 75 73 74 63 53 48 50 60 65 71 74 65 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 55 56 55 46 30 32 20 22 31 41 53 57 42 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 61 61 60 48 27 36 28 24 32 40 57 61 45 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 23 23 11 0 0 0 0 0 0 0 8 9 74 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 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 22 28 29 18 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. 29 25 25 0 0 0 0 0 0 0 13 28 120 DATE OF START AND END FREEZING START = 14 NOV. END = 30 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. -2.1 5.8 11.8 12.2 16.8 23.0 24.2 23.4 20.2 13.4 7.8 3.6 13.3 AVERAGE OF MINIMUM TEMPERATURE IN C. -8.3 -2.9 2.6 3.9 6.7 13.2 13.5 13.0 9.8 4.9 -0.1 -3.3 4.4 AVERAGE OF MAXIMUM TEMPERATURE IN C. 4.2 14.4 21.0 20.4 26.9 32.8 34.8 33.7 30.7 21.9 15.7 10.5 22.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 12.5 17.3 18.4 16.5 20.2 19.6 21.3 20.7 20.9 17.0 15.8 13.8 17.8 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.34 3.40 4.82 5.20 6.69 7.29 6.54 7.42 6.34 5.52 4.17 3.37 5.26 MEAN OF MIXING RATIO AT 09 GMT. 3.58 4.75 5.91 5.28 8.07 7.85 6.00 7.20 8.67 6.56 5.38 4.47 6.14 MEAN OF MIXING RATIO AT 15 GMT. 3.25 4.38 5.38 5.09 6.37 7.61 6.53 7.16 6.61 5.17 4.97 4.13 5.55 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -15.0 -9.5 -2.5 0.0 3.0 9.5 11.0 10.5 5.0 -3.0 -5.0 -9.5 -15.0 DAY 8 2 6 1 15 1 31 22 21 24 15 26 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 9.0 21.0 27.0 29.5 35.0 38.0 38.0 37.5 34.0 30.5 18.0 14.5 38.0 DAY 27 21 20 24 15 30 21 17 12 5 2 4 24 HOUR MAXIMUM PRECIPITATION IN MM. 15.0 0.0 10.0 30.0 10.0 0.0 0.0 0.0 0.0 0.0 6.0 10.0 30.0 DAY 3 ** 27 2 31 ** ** ** ** ** 6 15 MONTHLY TOTAL PRECIPITATION IN MM. 44.0 0.0 10.0 45.0 19.0 0.0 0.0 0.0 0.0 0.0 15.0 10.0 143.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 37.8 44.8 0.0 17.5 NO. OF DAYS WITH PRECIPITATION. 6 0 1 2 2 0 0 0 0 0 3 1 15 NO. OF DAYS PRECIPITATION EQUAL 6 0 1 2 2 0 0 0 0 0 3 1 15 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 0 1 2 1 0 0 0 0 0 0 1 7 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 80 72 68 66 63 50 37 44 54 67 76 78 63 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 63 43 37 33 34 22 16 20 28 34 42 50 35 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 68 52 44 40 33 30 22 24 28 34 53 58 41 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 27 12 0 0 0 0 0 0 0 0 2 11 52 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 4 0 0 0 0 0 0 0 0 0 0 0 4 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 4 25 31 28 26 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. 31 24 7 1 0 0 0 0 0 3 17 27 110 DATE OF START AND END FREEZING START = 24 OCT. END = 1 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 2.6 5.1 9.0 14.0 18.0 20.7 22.6 22.8 21.2 16.1 5.3 6.3 13.6 AVERAGE OF MINIMUM TEMPERATURE IN C. -4.8 -3.1 0.7 3.8 9.0 10.9 12.1 11.5 10.5 7.1 -1.7 -0.7 4.6 AVERAGE OF MAXIMUM TEMPERATURE IN C. 10.1 13.3 17.2 24.1 27.0 30.5 33.2 34.0 32.0 25.1 12.6 13.4 22.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 14.9 16.4 16.5 20.3 18.0 19.6 21.1 22.5 21.5 18.0 14.3 14.1 18.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.91 3.41 4.22 4.86 6.08 7.53 7.55 7.76 6.62 4.93 3.56 3.69 5.26 MEAN OF MIXING RATIO AT 09 GMT. 4.06 4.11 4.72 5.65 6.63 7.42 7.13 7.26 6.67 6.67 4.25 4.90 5.79 MEAN OF MIXING RATIO AT 15 GMT. 3.52 3.97 4.65 4.81 6.01 7.38 6.93 6.41 5.07 4.98 3.89 4.05 5.14 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -13.5 -8.0 -5.0 -0.5 2.0 6.5 9.0 9.0 7.0 5.0 -6.0 -5.5 -13.5 DAY 15 7 15 16 4 5 8 15 9 16 20 26 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 15.5 18.5 25.0 29.0 32.0 37.5 38.5 36.0 34.5 28.5 18.0 18.0 38.5 DAY 4 20 30 10 26 30 1 6 13 1 2 11 24 HOUR MAXIMUM PRECIPITATION IN MM. 0.0 0.0 7.0 0.0 6.0 0.0 2.0 0.0 0.0 0.0 5.0 16.5 16.5 DAY ** ** 8 ** 2 ** 7 ** ** ** 12 5 MONTHLY TOTAL PRECIPITATION IN MM. 0.0 0.0 15.0 0.0 6.0 0.0 2.0 0.0 0.0 0.0 5.0 31.5 59.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 25.2 10.1 3.4 61.3 NO. OF DAYS WITH PRECIPITATION. 0 0 4 0 1 0 1 0 0 0 1 2 9 NO. OF DAYS PRECIPITATION EQUAL 0 0 4 0 1 0 1 0 0 0 1 2 9 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 0 0 0 0 0 0 0 0 0 2 2 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 77 78 70 61 56 53 49 49 55 58 77 72 63 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 48 41 38 28 28 25 21 21 20 30 41 46 32 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 54 51 47 32 32 31 25 24 21 31 46 53 37 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 16 9 1 0 0 0 0 0 0 0 10 4 40 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 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 5 19 29 31 26 0 0 0 110 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. 29 25 15 3 0 0 0 0 0 0 23 22 117 DATE OF START AND END FREEZING START = 3 NOV. END = 26 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 4.8 5.9 7.3 15.9 16.2 22.1 26.1 22.7 20.2 16.6 9.3 3.6 14.2 AVERAGE OF MINIMUM TEMPERATURE IN C. -1.9 -1.4 0.1 7.8 9.0 14.4 17.3 13.3 10.8 7.9 0.3 -2.9 6.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 11.5 13.3 14.4 24.0 23.4 29.8 35.0 32.1 29.8 25.4 18.2 10.4 22.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 13.4 14.7 14.3 16.2 14.4 15.3 17.7 18.8 19.0 17.5 17.9 13.3 16.0 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.50 3.59 4.11 6.29 6.68 8.04 6.98 6.89 5.60 5.40 3.73 3.25 5.34 MEAN OF MIXING RATIO AT 09 GMT. 4.16 4.71 4.48 7.03 5.35 6.08 8.06 6.23 8.36 7.23 4.65 4.52 5.90 MEAN OF MIXING RATIO AT 15 GMT. 4.20 4.26 4.14 6.07 5.14 7.07 6.46 5.07 6.18 5.25 3.95 3.61 5.12 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -9.5 -5.0 -9.0 0.0 1.5 11.0 15.0 11.0 7.0 5.0 -5.0 -8.5 -9.5 DAY 13 5 5 30 1 2 6 31 27 30 21 24 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 19.0 17.5 22.5 30.0 28.5 35.0 38.0 35.0 34.5 29.5 24.5 15.5 38.0 DAY 5 14 26 5 16 30 18 18 12 3 2 9 24 HOUR MAXIMUM PRECIPITATION IN MM. 18.8 0.0 18.0 0.0 28.0 7.0 0.0 0.0 0.0 0.0 0.0 10.0 28.0 DAY 10 ** 27 ** 7 4 ** ** ** ** ** 21 MONTHLY TOTAL PRECIPITATION IN MM. 39.8 0.0 31.0 0.0 50.0 7.0 0.0 0.0 0.0 0.0 0.0 32.0 159.8 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 44.3 35.7 0.0 20.0 NO. OF DAYS WITH PRECIPITATION. 3 0 2 0 3 1 0 0 0 0 0 5 14 NO. OF DAYS PRECIPITATION EQUAL 3 0 2 0 3 1 0 0 0 0 0 5 14 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 0 2 0 2 0 0 0 0 0 0 1 7 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 76 75 74 64 62 50 37 47 47 58 70 77 61 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 45 45 39 34 28 21 20 19 27 31 31 51 33 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 58 54 45 40 34 30 21 22 26 35 44 56 39 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 6 2 5 0 0 0 0 0 0 0 3 10 26 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 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 2 0 16 31 27 18 0 0 0 94 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. 24 22 13 1 0 0 0 0 0 0 11 26 97 DATE OF START AND END FREEZING START = 18 NOV. END = 30 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 2.7 2.7 8.9 16.0 18.5 22.7 23.8 24.3 20.6 15.1 9.9 4.8 14.2 AVERAGE OF MINIMUM TEMPERATURE IN C. -3.9 -3.2 1.5 8.2 9.9 14.1 13.9 15.3 11.0 7.0 2.8 -3.1 6.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. 9.3 8.7 16.3 23.8 27.1 31.4 33.7 33.3 30.2 23.1 17.1 12.8 22.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 13.2 11.9 14.8 15.6 17.2 17.3 19.8 18.0 19.2 16.1 14.3 15.9 16.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.03 3.29 4.13 5.84 6.66 6.74 7.70 7.62 5.89 4.86 4.52 3.07 5.28 MEAN OF MIXING RATIO AT 09 GMT. 3.96 3.91 5.00 4.92 5.27 6.98 6.97 7.02 7.41 5.75 6.07 4.95 5.68 MEAN OF MIXING RATIO AT 15 GMT. 3.60 3.12 4.31 5.17 4.68 6.65 6.30 5.44 6.28 5.01 4.63 3.93 4.93 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -8.5 -10.5 -6.5 1.5 4.5 11.0 11.5 12.5 7.0 2.5 -3.5 -8.0 -10.5 DAY 8 1 6 17 1 1 2 28 25 31 26 21 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 14.0 13.0 23.5 28.0 31.0 34.5 36.0 36.0 34.5 31.0 19.5 18.0 36.0 DAY 29 23 27 22 27 9 29 23 5 3 14 6 24 HOUR MAXIMUM PRECIPITATION IN MM. 20.0 28.0 26.0 0.0 10.0 0.0 0.0 0.0 0.0 25.0 11.0 10.0 28.0 DAY 17 12 20 ** 6 ** ** ** ** 30 8 18 MONTHLY TOTAL PRECIPITATION IN MM. 44.0 57.6 26.0 0.0 10.0 0.0 0.0 0.0 0.0 25.0 11.0 15.0 188.6 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 67.7 5.3 0.0 27.0 NO. OF DAYS WITH PRECIPITATION. 5 3 1 0 1 0 0 0 0 1 1 2 14 NO. OF DAYS PRECIPITATION EQUAL 5 3 1 0 1 0 0 0 0 1 1 2 14 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 2 1 0 1 0 0 0 0 1 1 1 9 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 81 82 70 55 53 44 48 50 53 58 69 71 61 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 49 49 39 24 21 23 19 20 25 29 43 47 32 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 55 54 45 36 26 24 20 22 27 36 44 55 37 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 17 11 3 0 0 0 0 0 0 0 0 12 43 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 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 23 31 30 19 3 0 0 113 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. 29 25 12 0 0 0 0 0 0 0 6 28 100 DATE OF START AND END FREEZING START = 21 NOV. END = 18 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 3.0 4.3 10.5 14.3 18.5 22.4 25.8 24.8 21.0 14.7 10.8 7.5 14.8 AVERAGE OF MINIMUM TEMPERATURE IN C. -4.0 -2.9 2.0 6.2 9.4 13.8 17.3 15.4 10.9 6.3 2.1 -0.6 6.3 AVERAGE OF MAXIMUM TEMPERATURE IN C. 10.1 11.7 18.8 21.9 27.6 30.9 34.2 34.3 31.1 23.1 19.6 15.5 23.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 14.1 14.6 16.8 15.7 18.2 17.1 16.9 18.9 20.2 16.8 17.5 16.1 16.9 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.12 3.43 4.11 4.52 5.19 5.99 6.77 6.76 5.36 4.98 3.94 3.29 4.79 MEAN OF MIXING RATIO AT 09 GMT. 4.40 4.26 5.12 4.90 6.07 7.16 7.70 7.27 7.11 5.35 4.78 4.71 5.73 MEAN OF MIXING RATIO AT 15 GMT. 3.77 3.63 4.39 4.42 5.41 6.36 6.52 6.44 5.73 4.36 3.88 3.39 4.86 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -8.5 -8.0 -5.0 -3.0 6.0 10.0 12.0 12.0 4.0 2.5 -3.5 -3.0 -8.5 DAY 4 4 5 2 3 1 31 1 25 31 24 3 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 14.5 17.5 25.5 28.0 33.5 35.0 37.0 36.5 35.0 26.5 24.5 19.0 37.0 DAY 25 19 24 22 27 24 10 10 20 3 2 15 24 HOUR MAXIMUM PRECIPITATION IN MM. 20.0 7.0 6.0 5.0 0.0 7.0 0.0 0.0 0.0 9.0 0.0 1.7 20.0 DAY 12 21 28 17 ** 28 ** ** ** 14 ** 31 MONTHLY TOTAL PRECIPITATION IN MM. 20.0 17.0 6.0 5.0 0.0 12.0 0.0 0.0 0.0 16.0 0.0 1.7 77.7 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 55.3 21.9 0.0 22.8 NO. OF DAYS WITH PRECIPITATION. 1 3 2 1 0 2 0 0 0 2 0 1 12 NO. OF DAYS PRECIPITATION EQUAL 1 3 1 1 0 2 0 0 0 2 0 1 11 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 0 0 0 0 0 0 0 0 0 0 0 1 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 79 75 62 55 47 41 39 43 45 62 61 66 56 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 51 44 34 27 25 23 21 18 23 28 30 38 30 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 57 51 42 33 28 25 23 21 26 32 36 42 35 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 13 7 2 0 0 0 0 0 0 0 0 0 22 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 2 0 0 0 0 0 2 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 20 31 31 24 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. 22 21 7 1 0 0 0 0 0 0 10 20 81 DATE OF START AND END FREEZING START = 7 NOV. END = 2 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 2.9 1.8 7.2 16.4 20.2 25.1 26.6 ***** 22.3 ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -4.2 -5.3 -0.1 8.0 12.2 15.9 17.2 ***** 13.4 ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 10.0 8.9 14.5 24.7 28.2 34.2 35.9 ***** 31.3 ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 14.2 14.2 14.6 16.7 16.0 18.3 18.7 ***** 17.9 ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.05 2.71 3.68 5.55 5.92 7.22 7.10 ***** 5.51 ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. 3.72 3.23 4.03 5.83 6.39 7.36 7.81 ***** 6.47 ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. 2.88 2.77 3.40 5.36 5.70 7.02 7.54 ***** 5.85 ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -10.0 -10.0 -4.0 2.0 9.0 12.0 14.5 ***** 10.0 ***** ***** ***** ****** DAY 21 19 8 1 1 3 21 ** 21 ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 19.0 16.0 19.5 28.0 32.5 38.0 39.5 ***** 35.0 ***** ***** ***** ****** DAY 15 28 24 24 18 12 17 ** 2 ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. 3.0 4.2 12.0 0.0 0.0 0.0 0.0 ***** 0.0 ***** ***** ***** ****** DAY 17 14 15 ** ** ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. 3.0 9.2 33.0 0.0 0.0 0.0 0.0 ***** 0.0 ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 100.0 0.0 0.0 ***** NO. OF DAYS WITH PRECIPITATION. 1 3 4 0 0 0 0 *** 0 *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL 1 3 4 0 0 0 0 *** 0 *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 2 0 0 0 0 *** 0 *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 75 73 69 56 47 42 39 *** 42 *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 45 43 36 28 24 20 19 *** 20 *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 46 45 37 31 28 23 22 *** 22 *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 16 21 1 0 0 0 0 *** 0 *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 2 *** 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 0 0 11 30 31 *** 23 *** *** *** *** 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. 31 28 17 0 0 0 0 *** 0 *** *** *** *** DATE OF START AND END FREEZING START = 1 JAN. END = 23 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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.***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ***** ****** 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 NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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.***** ***** ***** ***** ***** ***** ***** 26.7 22.5 12.5 10.3 5.0 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** 21.0 17.0 7.9 5.6 0.4 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** 32.3 28.1 17.1 15.0 9.6 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** ***** 11.3 11.1 9.2 9.4 9.2 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** ***** 7.51 6.29 5.45 3.98 3.83 ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** ***** 6.93 5.26 5.10 3.59 3.58 ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** ***** 6.63 5.34 5.53 3.75 3.72 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** 16.0 12.5 2.0 -3.5 -5.5 ****** DAY ** ** ** ** ** ** ** 29 30 12 29 1 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** ***** 35.0 35.5 27.0 23.0 14.5 ****** DAY ** ** ** ** ** ** ** 5 6 2 7 11 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** 0.0 0.0 6.2 3.0 11.0 ****** DAY ** ** ** ** ** ** ** ** ** 27 29 24 MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** ***** 0.0 0.0 19.4 3.0 26.4 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** 0.0 100.0 NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** *** 0 0 10 1 6 *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** 0 0 7 1 6 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** *** 0 0 0 0 2 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** *** 35 38 62 52 69 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** *** 21 21 43 32 47 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** *** 22 23 52 41 54 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** 0 0 0 0 2 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** 22 2 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** 0 0 0 0 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** 28 7 0 0 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** 0 0 0 0 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** *** 0 0 0 0 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** *** 0 0 0 2 12 *** DATE OF START AND END FREEZING START = 29 NOV. END = 31 DEC. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 1.7 2.8 9.1 14.0 21.1 25.2 27.7 26.7 22.9 16.9 11.0 6.6 15.5 AVERAGE OF MINIMUM TEMPERATURE IN C. -2.3 -1.3 4.0 8.6 15.4 19.4 21.7 21.4 17.4 11.7 5.9 2.3 10.4 AVERAGE OF MAXIMUM TEMPERATURE IN C. 5.7 6.8 14.3 19.4 26.7 31.0 33.6 32.0 28.3 22.1 16.1 10.9 20.6 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.0 8.1 10.3 10.8 11.3 11.6 11.9 10.6 10.9 10.4 10.2 8.6 10.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.83 3.08 3.77 4.94 5.03 5.36 6.62 6.02 4.73 4.80 3.49 2.93 4.47 MEAN OF MIXING RATIO AT 09 GMT. 3.29 3.44 4.00 4.81 4.26 4.32 6.12 5.72 4.81 4.71 3.29 2.90 4.31 MEAN OF MIXING RATIO AT 15 GMT. 3.24 3.67 3.97 4.96 4.46 4.15 5.71 5.22 5.00 5.17 3.15 2.79 4.29 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -6.0 -6.5 -3.0 1.0 10.0 16.0 15.5 17.0 10.5 8.5 -2.5 -6.5 -6.5 DAY 1 7 6 2 7 28 28 26 30 2 15 30 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.0 15.5 21.5 27.5 33.5 36.0 37.5 35.5 34.0 26.0 27.0 17.0 37.5 DAY 6 1 20 23 28 14 3 2 11 20 5 4 24 HOUR MAXIMUM PRECIPITATION IN MM. 5.5 11.4 12.5 11.8 1.5 0.0 0.0 0.0 0.0 8.0 2.6 2.8 12.5 DAY 18 17 23 26 20 ** ** ** ** 16 13 26 MONTHLY TOTAL PRECIPITATION IN MM. 12.0 52.3 26.9 25.1 1.5 0.0 0.0 0.0 0.0 14.3 2.6 3.8 138.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 65.8 19.2 0.0 14.9 NO. OF DAYS WITH PRECIPITATION. 4 9 4 7 1 0 0 0 0 2 1 2 30 NO. OF DAYS PRECIPITATION EQUAL 4 9 3 6 1 0 0 0 0 2 1 2 28 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 2 1 0 0 0 0 0 0 0 0 4 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 66 66 52 50 33 27 30 29 29 42 43 46 43 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 54 55 39 33 19 15 19 19 19 27 25 33 30 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 59 63 42 38 21 14 18 17 21 34 30 39 33 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 7 8 0 0 0 0 0 0 0 0 0 2 17 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 7 22 24 4 0 0 0 57 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 2 21 29 26 11 0 0 0 89 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. 28 22 3 0 0 0 0 0 0 0 5 8 66 DATE OF START AND END FREEZING START = 15 NOV. END = 24 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. -1.3 -0.2 8.8 15.6 20.2 27.3 28.8 27.9 23.4 18.2 9.8 5.7 15.3 AVERAGE OF MINIMUM TEMPERATURE IN C. -5.2 -4.5 4.4 10.8 15.2 21.7 23.6 22.6 18.3 13.4 6.0 2.1 10.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.6 4.0 13.2 20.5 25.1 32.9 34.0 33.2 28.5 22.9 13.7 9.2 20.0 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.8 8.5 8.8 9.8 9.9 11.2 10.4 10.6 10.2 9.5 7.7 7.1 9.3 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.24 2.16 4.10 4.55 5.77 6.19 6.77 5.98 4.91 4.39 4.43 3.39 4.57 MEAN OF MIXING RATIO AT 09 GMT. 2.23 2.27 4.26 4.37 5.21 5.54 6.29 5.72 5.36 4.51 4.55 3.71 4.50 MEAN OF MIXING RATIO AT 15 GMT. 2.34 2.40 4.51 4.53 5.14 5.52 6.12 5.32 4.79 4.65 4.68 4.11 4.51 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -11.5 -12.5 -3.5 2.0 6.5 15.0 18.5 18.5 11.0 7.5 2.0 -1.6 -12.5 DAY 31 4 30 1 1 8 26 19 22 23 22 8 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.5 14.5 20.5 26.5 34.5 38.5 38.5 36.0 34.5 28.6 19.5 16.5 38.5 DAY 20 28 26 15 31 30 13 5 4 8 28 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 4.0 7.5 15.8 4.5 3.0 0.0 0.0 0.0 0.0 0.0 14.0 37.1 37.1 DAY 12 23 16 12 6 ** ** ** ** ** 17 4 MONTHLY TOTAL PRECIPITATION IN MM. 16.9 16.3 44.5 6.7 7.2 0.0 0.0 0.0 0.0 0.0 31.5 60.2 183.3 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 42.4 7.6 0.0 50.0 NO. OF DAYS WITH PRECIPITATION. 7 4 8 3 4 0 0 0 0 0 5 7 38 NO. OF DAYS PRECIPITATION EQUAL 7 4 7 3 2 0 0 0 0 0 4 6 33 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 2 0 0 0 0 0 0 0 1 1 4 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 64 59 62 41 38 27 28 27 30 35 58 56 44 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 45 41 43 27 26 17 18 17 21 23 41 45 30 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 56 48 51 31 29 19 18 17 21 29 49 61 36 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 22 16 0 0 0 0 0 0 0 0 0 0 38 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 4 21 26 26 11 0 0 0 88 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 6 4 0 0 0 0 0 0 0 0 0 0 10 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 7 28 28 29 14 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. 30 26 2 0 0 0 0 0 0 0 0 7 65 DATE OF START AND END FREEZING START = 6 DEC. END = 31 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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 NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 1.7 1.2 7.2 15.7 19.1 24.6 27.9 27.4 23.0 ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -1.4 -2.4 3.6 10.8 14.0 19.2 22.3 22.0 17.6 ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 4.8 4.8 10.8 20.6 24.1 30.0 33.5 32.8 28.4 ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 6.2 7.1 7.2 9.8 10.1 10.8 11.2 10.8 10.8 ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.31 3.01 4.53 4.50 4.95 5.63 6.76 6.39 5.42 ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. 3.91 3.30 4.71 4.05 4.50 5.14 6.56 6.52 5.96 ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. 3.93 3.35 5.09 4.24 4.83 4.95 6.45 6.13 5.72 ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -5.0 -11.0 -3.0 4.0 6.5 16.5 18.0 18.5 8.5 ***** ***** ***** ****** DAY 28 13 11 14 25 1 12 28 27 ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 13.0 14.0 19.5 26.5 30.5 35.0 37.5 38.0 35.5 ***** ***** ***** ****** DAY 31 27 24 22 16 11 7 6 7 ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. 3.6 9.2 12.5 3.2 3.0 0.0 0.0 0.0 0.0 ***** ***** ***** ****** DAY 14 22 31 29 7 ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. 10.2 25.3 55.8 3.2 5.8 0.0 0.0 0.0 0.0 ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 91.0 9.0 0.0 ***** NO. OF DAYS WITH PRECIPITATION. 5 7 11 1 4 0 0 0 0 *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL 3 6 10 1 3 0 0 0 0 *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 2 0 0 0 0 0 0 *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 73 68 69 40 37 29 29 28 33 *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 65 55 52 25 24 19 20 20 24 *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 71 61 62 28 29 18 20 19 25 *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 4 13 0 0 0 0 0 0 0 *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 6 25 21 7 *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 9 0 0 0 0 0 0 0 *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 2 16 30 27 15 *** *** *** *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 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 *** *** *** *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 28 19 4 0 0 0 0 0 0 *** *** *** *** DATE OF START AND END FREEZING START = 1 JAN. END = 17 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. -1.5 2.1 3.9 12.9 15.5 23.7 28.6 24.7 21.2 15.8 10.6 2.7 13.4 AVERAGE OF MINIMUM TEMPERATURE IN C. -5.6 -2.8 -0.5 8.1 11.0 18.8 23.7 19.6 16.3 11.1 6.3 -0.4 8.8 AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.4 7.0 8.3 17.7 20.0 28.9 33.7 29.7 26.0 20.6 14.9 5.8 17.9 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.0 9.8 8.8 9.6 9.0 10.1 10.0 10.1 9.7 9.5 8.6 6.2 9.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.30 2.17 3.17 4.59 6.66 6.97 7.01 6.93 4.90 4.05 3.85 3.49 4.67 MEAN OF MIXING RATIO AT 09 GMT. 2.63 3.04 3.42 4.86 6.81 6.51 6.20 6.88 5.43 4.69 4.06 3.80 4.86 MEAN OF MIXING RATIO AT 15 GMT. 2.82 2.58 3.50 5.12 7.07 6.49 6.20 6.82 5.46 4.86 4.37 3.94 4.94 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -14.0 -6.5 -8.0 2.0 2.5 15.0 19.0 14.0 10.0 7.0 -6.0 -8.5 -14.0 DAY 26 27 12 1 5 9 12 31 30 8 27 29 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 9.0 15.0 19.0 24.5 27.5 35.0 37.6 34.0 31.0 24.0 19.5 15.8 37.6 DAY 2 24 30 22 29 30 5 1 25 4 7 12 24 HOUR MAXIMUM PRECIPITATION IN MM. 20.0 13.0 15.0 16.0 26.0 1.0 0.0 3.0 0.0 0.0 0.0 8.0 26.0 DAY 25 25 18 25 7 15 ** 13 ** ** ** 9 MONTHLY TOTAL PRECIPITATION IN MM. 47.8 16.0 47.9 33.5 84.7 1.0 0.0 3.0 0.0 0.0 0.0 20.1 254.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 44.0 46.9 1.2 7.9 NO. OF DAYS WITH PRECIPITATION. 8 2 8 6 14 1 0 1 0 0 0 8 48 NO. OF DAYS PRECIPITATION EQUAL 7 2 6 5 13 1 0 1 0 0 0 4 39 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 2 1 4 0 0 0 0 0 0 0 9 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 64 53 63 49 59 38 28 37 32 38 46 72 48 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 55 49 48 36 48 25 18 25 24 28 34 60 38 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 64 47 51 43 51 25 18 25 26 33 43 69 41 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 18 14 6 0 0 0 0 0 0 0 1 4 43 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 7 27 8 0 0 0 0 42 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 9 0 2 0 0 0 0 0 0 0 0 2 13 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 11 27 17 1 0 0 0 56 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 26 17 0 0 0 0 0 0 0 4 17 95 DATE OF START AND END FREEZING START = 26 NOV. END = 27 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. -0.6 3.3 6.8 14.4 18.6 25.1 26.9 26.3 24.2 14.5 7.8 5.7 14.4 AVERAGE OF MINIMUM TEMPERATURE IN C. -3.9 -0.8 2.4 9.7 13.5 19.6 21.5 20.7 18.9 9.8 3.8 1.4 9.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.6 7.4 11.2 19.2 23.7 30.5 32.3 31.8 29.5 19.2 11.9 9.9 19.1 DIFFERENCE BETWEEN AVERAGE MAXIMUM 6.5 8.2 8.8 9.5 10.2 10.9 10.8 11.1 10.6 9.4 8.1 8.5 9.4 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.70 3.48 3.30 5.00 5.95 5.30 6.95 5.90 4.27 3.43 4.06 3.18 4.46 MEAN OF MIXING RATIO AT 09 GMT. 3.21 3.92 3.46 5.01 5.69 4.66 5.73 5.07 3.75 3.23 4.11 3.59 4.29 MEAN OF MIXING RATIO AT 15 GMT. 3.24 3.99 3.65 5.30 5.81 4.65 5.57 4.99 4.25 3.77 4.36 3.82 4.45 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -9.0 -9.0 -4.0 6.0 7.0 15.0 19.0 17.0 13.5 5.0 -4.5 -3.2 -9.0 DAY 21 6 23 14 1 5 31 3 28 8 30 1 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 12.6 17.8 18.6 27.4 29.2 35.0 36.2 35.8 34.4 28.0 22.0 16.0 36.2 DAY 29 28 31 20 31 30 3 14 3 1 1 18 24 HOUR MAXIMUM PRECIPITATION IN MM. 7.2 10.0 20.0 9.5 8.0 0.0 0.0 0.2 0.3 0.0 16.0 0.3 20.0 DAY 7 3 9 27 6 ** ** 28 27 ** 12 16 MONTHLY TOTAL PRECIPITATION IN MM. 21.1 40.8 48.1 30.7 10.3 0.0 0.0 0.2 0.3 0.0 25.4 0.3 177.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 62.1 23.1 0.3 14.5 NO. OF DAYS WITH PRECIPITATION. 8 9 10 7 6 0 0 1 1 0 5 1 48 NO. OF DAYS PRECIPITATION EQUAL 6 8 7 7 2 0 0 0 0 0 4 0 34 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 2 1 0 0 0 0 0 0 0 1 0 4 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 72 69 53 49 44 26 31 29 24 34 60 59 46 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 66 58 42 37 30 17 18 16 14 22 46 45 34 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 74 64 46 41 33 16 17 16 17 28 53 55 38 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 21 5 1 0 0 0 0 0 0 0 1 0 28 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 12 21 16 11 0 0 0 60 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 12 0 0 0 0 0 0 0 0 0 0 0 12 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 18 29 27 15 0 0 0 89 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. 28 17 7 0 0 0 0 0 0 0 7 10 69 DATE OF START AND END FREEZING START = 14 NOV. END = 24 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 4.2 3.8 9.5 15.5 19.5 25.4 28.9 28.9 20.4 14.9 11.3 2.0 15.4 AVERAGE OF MINIMUM TEMPERATURE IN C. 0.2 -0.9 5.0 10.7 14.4 19.7 23.3 23.3 15.5 10.9 7.0 -2.1 10.6 AVERAGE OF MAXIMUM TEMPERATURE IN C. 8.1 8.6 14.0 20.4 24.7 31.1 34.4 34.5 25.3 18.8 15.5 6.0 20.1 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.9 9.5 9.0 9.7 10.3 11.4 11.1 11.2 9.8 7.9 8.5 8.1 9.5 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.10 2.77 3.77 4.87 5.29 5.12 7.05 5.57 4.10 5.89 4.38 2.39 4.52 MEAN OF MIXING RATIO AT 09 GMT. 3.64 3.06 3.79 4.36 4.75 4.62 6.31 5.17 3.57 5.97 4.47 2.65 4.36 MEAN OF MIXING RATIO AT 15 GMT. 3.88 3.23 4.12 4.97 5.23 4.50 6.23 5.10 3.81 6.68 4.92 2.95 4.64 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -6.0 -8.5 0.0 2.0 8.0 12.0 18.0 19.4 8.4 8.0 1.4 -11.6 -11.6 DAY 25 19 15 5 7 5 1 26 20 30 10 7 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 17.0 14.8 20.2 28.0 29.8 36.0 39.0 37.4 30.6 23.8 20.4 14.8 39.0 DAY 4 1 30 24 31 20 30 3 2 1 4 20 24 HOUR MAXIMUM PRECIPITATION IN MM. 7.0 29.0 28.3 3.2 5.0 0.0 0.0 0.0 0.0 4.8 10.7 2.0 29.0 DAY 5 1 27 18 16 ** ** ** ** 16 17 3 MONTHLY TOTAL PRECIPITATION IN MM. 14.4 39.4 50.5 10.6 11.4 0.0 0.0 0.0 0.0 16.9 18.4 5.6 167.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 62.4 13.2 0.0 24.5 NO. OF DAYS WITH PRECIPITATION. 3 4 7 8 6 0 0 0 0 9 4 5 46 NO. OF DAYS PRECIPITATION EQUAL 3 3 6 3 3 0 0 0 0 6 2 2 28 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 1 0 0 0 0 0 0 0 1 0 3 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 60 57 54 44 37 25 29 23 28 55 52 51 43 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 51 43 37 28 24 17 18 15 16 40 36 39 30 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 61 51 42 34 27 15 17 14 19 50 47 52 36 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 1 4 0 0 0 0 0 0 0 0 0 12 17 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 10 28 29 0 0 0 0 67 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 1 0 0 0 0 0 0 0 0 0 3 4 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 20 29 31 2 0 0 0 82 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 21 3 0 0 0 0 0 0 0 0 20 62 DATE OF START AND END FREEZING START = 5 DEC. END = 17 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 4.8 5.1 9.2 14.3 18.8 23.8 29.8 29.4 22.9 15.6 11.0 1.8 15.5 AVERAGE OF MINIMUM TEMPERATURE IN C. 0.4 0.9 4.2 9.8 13.9 18.4 24.6 23.9 17.7 10.6 6.0 -1.5 10.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 9.3 9.4 14.2 18.7 23.6 29.1 34.9 34.8 28.2 20.6 16.0 5.0 20.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.9 8.5 10.0 8.9 9.7 10.7 10.3 10.9 10.5 10.0 10.0 6.5 9.6 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.76 3.17 3.25 5.47 6.57 7.17 7.59 4.72 5.06 4.04 2.91 3.02 4.64 MEAN OF MIXING RATIO AT 09 GMT. 3.16 3.43 3.13 5.16 6.13 6.47 7.55 4.59 5.68 4.17 3.35 3.62 4.70 MEAN OF MIXING RATIO AT 15 GMT. 3.41 3.56 3.36 5.78 6.20 6.44 7.25 4.51 5.62 4.54 3.24 3.71 4.80 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -4.0 -3.0 -1.0 4.4 7.6 10.0 21.0 20.0 9.0 5.2 -4.2 -6.0 -6.0 DAY 21 26 6 7 9 1 1 10 22 18 29 21 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 14.0 13.0 22.6 24.0 29.6 35.2 38.6 37.0 31.8 28.8 22.2 10.0 38.6 DAY 17 4 25 3 7 21 16 5 12 4 10 29 24 HOUR MAXIMUM PRECIPITATION IN MM. 2.0 8.0 27.0 15.0 25.0 6.0 0.0 0.0 0.3 0.0 0.0 5.4 27.0 DAY 1 24 21 13 29 6 ** ** 22 ** ** 12 MONTHLY TOTAL PRECIPITATION IN MM. 2.0 22.3 32.0 49.7 59.0 7.3 0.0 0.0 0.3 0.0 0.0 19.8 192.4 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 29.3 60.3 0.2 10.3 NO. OF DAYS WITH PRECIPITATION. 1 7 3 10 5 3 0 0 1 0 0 11 41 NO. OF DAYS PRECIPITATION EQUAL 1 4 3 7 5 1 0 0 0 0 0 6 27 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 1 1 2 0 0 0 0 0 0 0 4 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 52 57 46 53 48 40 29 18 32 40 36 67 43 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 38 43 30 37 35 26 21 13 24 25 28 61 32 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 51 50 34 45 36 25 19 13 24 32 31 71 36 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 3 0 0 0 0 0 0 0 0 0 1 5 9 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 9 31 29 6 0 0 0 75 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 1 1 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 15 31 31 12 0 0 0 89 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. 15 11 3 0 0 0 0 0 0 0 5 25 59 DATE OF START AND END FREEZING START = 26 NOV. END = 27 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. -0.7 4.7 5.8 13.7 19.9 25.2 26.4 27.1 24.8 16.0 7.8 6.3 14.7 AVERAGE OF MINIMUM TEMPERATURE IN C. -4.5 0.8 2.1 8.5 15.0 19.8 21.5 22.1 19.9 10.9 3.9 1.9 10.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.1 8.6 9.6 18.8 24.8 30.6 31.3 32.1 29.7 21.0 11.8 10.6 19.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.6 7.8 7.5 10.3 9.8 10.8 9.8 10.0 9.8 10.1 7.9 8.7 9.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.67 4.00 4.23 5.76 8.25 7.12 7.27 6.37 5.09 4.58 3.51 2.89 5.15 MEAN OF MIXING RATIO AT 09 GMT. 3.18 4.76 4.66 6.12 8.54 7.20 6.39 6.12 5.90 5.16 3.64 3.27 5.41 MEAN OF MIXING RATIO AT 15 GMT. 3.19 4.64 5.06 6.60 8.78 7.12 6.21 5.95 6.23 5.02 3.67 3.48 5.50 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -13.4 -5.6 -2.0 -0.4 10.4 15.6 16.6 18.2 15.0 5.4 -2.0 -3.6 -13.4 DAY 16 6 1 5 13 28 15 4 24 17 13 3 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 12.6 19.6 20.4 25.0 32.2 36.2 34.8 35.6 33.4 26.8 19.2 17.8 36.2 DAY 5 10 31 22 31 4 2 22 5 14 8 28 24 HOUR MAXIMUM PRECIPITATION IN MM. 15.0 21.0 35.0 3.1 8.0 4.0 0.0 0.0 0.0 0.1 0.7 5.0 35.0 DAY 13 5 4 4 22 28 ** ** ** 15 22 15 MONTHLY TOTAL PRECIPITATION IN MM. 40.0 60.3 121.5 14.0 21.9 4.4 0.0 0.0 0.0 0.1 0.7 8.0 270.9 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 81.9 14.9 0.0 3.2 NO. OF DAYS WITH PRECIPITATION. 6 11 15 7 13 2 0 0 0 1 1 2 58 NO. OF DAYS PRECIPITATION EQUAL 6 8 12 5 6 1 0 0 0 0 0 2 40 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 2 6 0 0 0 0 0 0 0 0 0 10 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 70 72 73 60 55 35 34 29 28 42 54 50 50 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 60 67 61 43 42 25 21 19 21 31 36 36 39 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 71 72 71 52 46 26 20 19 24 34 44 47 44 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 17 2 0 0 0 0 0 0 0 0 0 0 19 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 1 11 20 24 12 0 0 0 68 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 9 0 0 0 0 0 0 0 0 0 0 0 9 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 4 17 22 27 18 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. 23 13 6 1 0 0 0 0 0 0 4 8 55 DATE OF START AND END FREEZING START = 13 NOV. END = 5 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 4.3 3.1 6.2 14.4 19.4 25.3 30.0 29.0 22.8 18.3 8.4 4.2 15.5 AVERAGE OF MINIMUM TEMPERATURE IN C. 0.1 -2.0 1.7 9.4 14.3 20.7 24.7 23.4 17.6 13.9 5.1 0.9 10.8 AVERAGE OF MAXIMUM TEMPERATURE IN C. 8.5 8.2 10.7 19.5 24.5 30.0 35.4 34.5 27.9 22.7 11.8 7.5 20.1 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.4 10.2 9.0 10.1 10.2 9.3 10.7 11.1 10.3 8.8 6.7 6.6 9.3 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.67 1.85 3.30 4.12 5.59 6.89 7.66 5.32 4.85 5.13 4.31 3.65 4.61 MEAN OF MIXING RATIO AT 09 GMT. 3.16 2.16 3.54 3.95 5.64 7.06 7.91 5.18 5.47 5.36 4.39 4.24 4.84 MEAN OF MIXING RATIO AT 15 GMT. 3.10 2.06 3.49 4.38 5.66 7.45 8.11 5.15 5.61 5.85 4.76 4.41 5.00 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -8.2 -9.8 -5.6 -2.0 7.0 16.5 21.0 19.0 11.4 7.0 0.8 -4.0 -9.8 DAY 29 7 9 12 6 20 7 29 15 25 28 29 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 15.6 17.8 16.8 26.6 29.4 35.0 38.2 38.6 33.2 30.2 19.2 13.2 38.6 DAY 7 22 23 27 30 16 30 14 2 6 4 9 24 HOUR MAXIMUM PRECIPITATION IN MM. 2.0 1.0 10.1 8.0 4.0 4.0 0.0 0.0 0.0 11.0 2.4 16.0 16.0 DAY 16 1 13 5 19 14 ** ** ** 24 1 21 MONTHLY TOTAL PRECIPITATION IN MM. 4.2 1.1 45.4 11.7 16.6 7.3 0.0 0.0 0.0 12.7 5.9 29.4 134.3 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 37.8 26.5 0.0 35.7 NO. OF DAYS WITH PRECIPITATION. 3 2 11 6 10 6 0 0 0 3 6 8 55 NO. OF DAYS PRECIPITATION EQUAL 2 1 9 2 6 1 0 0 0 2 2 4 29 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 1 0 0 0 0 0 0 1 0 1 3 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 52 39 58 40 40 34 30 22 30 40 61 69 43 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 43 28 42 27 29 25 22 14 22 28 45 59 32 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 49 29 43 33 30 27 21 14 24 35 55 72 36 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 2 11 1 0 0 0 0 0 0 0 0 1 15 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 1 15 31 29 4 0 0 0 80 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 1 0 0 0 0 0 0 0 0 0 1 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 17 31 31 6 1 0 0 86 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 17 8 1 0 0 0 0 0 0 0 13 53 DATE OF START AND END FREEZING START = 15 DEC. END = 12 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 0.7 3.0 8.4 15.9 19.7 26.0 28.3 27.6 23.7 16.5 13.2 9.0 16.0 AVERAGE OF MINIMUM TEMPERATURE IN C. -2.8 -1.0 3.7 10.6 14.3 20.5 23.2 22.6 18.8 11.8 8.7 4.7 11.3 AVERAGE OF MAXIMUM TEMPERATURE IN C. 4.2 7.1 13.2 21.2 25.1 31.6 33.5 32.5 28.6 21.3 17.8 13.3 20.8 DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.0 8.1 9.5 10.6 10.8 11.1 10.3 9.9 9.8 9.5 9.1 8.6 9.5 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.13 3.46 4.07 4.94 6.65 5.66 6.89 6.56 4.93 4.04 2.75 3.04 4.68 MEAN OF MIXING RATIO AT 09 GMT. 3.61 3.63 4.12 5.03 6.66 5.02 6.24 5.93 4.81 4.58 3.41 3.47 4.71 MEAN OF MIXING RATIO AT 15 GMT. 3.56 3.85 4.52 5.54 6.88 4.89 5.97 5.89 5.46 4.91 3.44 3.55 4.87 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -7.4 -8.2 -5.8 2.8 6.8 15.0 18.0 18.0 14.4 4.0 4.0 1.0 -8.2 DAY 14 17 2 6 3 3 25 4 12 10 25 5 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 9.6 18.0 22.4 28.2 32.2 35.6 38.2 38.0 33.4 29.0 22.2 19.0 38.2 DAY 30 7 29 17 29 28 11 20 3 2 20 14 24 HOUR MAXIMUM PRECIPITATION IN MM. 5.0 30.0 26.0 3.0 8.0 0.0 0.5 5.0 0.2 8.0 0.2 2.0 30.0 DAY 13 10 18 6 14 ** 25 4 14 10 13 4 MONTHLY TOTAL PRECIPITATION IN MM. 20.6 61.3 85.2 7.4 21.3 0.0 0.5 9.4 0.2 12.0 0.2 2.9 221.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 75.6 13.0 4.6 6.8 NO. OF DAYS WITH PRECIPITATION. 9 11 9 4 6 0 1 4 1 4 1 3 53 NO. OF DAYS PRECIPITATION EQUAL 7 7 9 3 5 0 0 2 0 2 0 1 36 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 2 3 0 0 0 0 0 0 0 0 0 5 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 76 74 61 47 47 26 30 31 28 39 31 43 44 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 64 56 43 32 33 17 19 19 19 28 25 35 33 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 69 65 49 35 35 16 18 20 22 33 31 42 36 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 11 6 2 0 0 0 0 0 0 0 0 0 19 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 13 24 23 7 0 0 0 67 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 1 2 1 0 0 0 0 0 0 0 0 0 4 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 5 24 28 25 9 0 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. 28 22 6 0 0 0 0 0 0 0 0 0 56 DATE OF START AND END FREEZING START = 2 JAN. END = 6 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 2.2 7.5 8.2 14.9 21.7 26.8 26.8 28.0 23.5 18.4 8.6 5.3 16.0 AVERAGE OF MINIMUM TEMPERATURE IN C. -1.1 2.7 4.1 9.9 16.1 21.2 21.7 23.0 18.5 14.0 4.7 1.4 11.3 AVERAGE OF MAXIMUM TEMPERATURE IN C. 5.6 12.2 12.3 19.9 27.4 32.4 31.8 33.0 28.6 22.9 12.6 9.3 20.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 6.7 9.5 8.2 10.0 11.3 11.2 10.1 10.0 10.1 8.9 7.9 7.9 9.3 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.43 2.96 3.28 4.77 4.48 4.71 6.69 5.81 4.87 3.76 4.10 3.08 4.33 MEAN OF MIXING RATIO AT 09 GMT. 3.85 3.14 3.60 5.22 4.08 4.04 6.17 5.57 5.36 4.07 4.49 3.50 4.42 MEAN OF MIXING RATIO AT 15 GMT. 3.77 3.15 3.73 5.35 4.36 3.69 6.03 5.79 5.71 4.42 4.70 3.91 4.55 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -7.6 -2.0 -3.0 4.6 10.6 17.2 16.0 20.4 12.4 5.8 -4.2 -3.4 -7.6 DAY 3 22 19 9 21 17 28 20 28 27 30 1 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 13.8 16.2 20.6 23.2 33.0 37.4 38.4 34.8 32.8 28.6 19.0 16.2 38.4 DAY 9 8 31 30 31 28 4 29 11 12 1 30 24 HOUR MAXIMUM PRECIPITATION IN MM. 19.0 1.0 29.0 5.0 1.0 0.0 3.0 0.0 0.0 0.0 8.0 9.0 29.0 DAY 25 6 2 29 14 ** 28 ** ** ** 9 12 MONTHLY TOTAL PRECIPITATION IN MM. 48.1 2.3 71.9 13.6 1.0 0.0 4.0 0.0 0.0 0.0 18.4 15.9 175.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 69.8 8.3 2.3 19.6 NO. OF DAYS WITH PRECIPITATION. 13 3 10 7 1 0 2 0 0 0 6 5 47 NO. OF DAYS PRECIPITATION EQUAL 8 2 6 4 1 0 2 0 0 0 4 3 30 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 0 3 0 0 0 0 0 0 0 0 0 5 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 71 48 51 48 29 22 34 25 29 31 60 56 42 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 61 34 40 33 17 13 21 16 21 22 46 44 31 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 68 38 45 36 18 11 20 17 23 27 57 60 35 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 7 0 0 0 0 0 0 0 0 0 1 0 8 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 1 16 21 29 7 0 0 0 74 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 5 27 21 31 16 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. 19 5 1 0 0 0 0 0 0 0 2 10 37 DATE OF START AND END FREEZING START = 29 NOV. END = 19 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 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. 2.8 4.1 8.8 18.1 23.0 26.0 27.6 27.7 24.4 15.4 6.9 4.3 15.8 AVERAGE OF MINIMUM TEMPERATURE IN C. -1.4 -0.6 3.8 12.8 17.2 20.1 22.3 22.4 19.4 10.9 3.8 1.0 11.0 AVERAGE OF MAXIMUM TEMPERATURE IN C. 7.0 8.8 13.8 23.5 28.9 31.9 32.9 33.0 29.4 19.8 9.9 7.7 20.5 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.4 9.4 10.0 10.7 11.7 11.8 10.6 10.6 10.0 8.9 6.1 6.7 9.6 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.28 2.62 2.85 4.29 4.96 5.33 5.94 5.18 5.34 5.32 4.61 3.88 4.38 MEAN OF MIXING RATIO AT 09 GMT. 2.90 2.79 2.68 4.56 5.53 5.32 5.60 4.95 5.80 6.04 5.02 4.73 4.66 MEAN OF MIXING RATIO AT 15 GMT. 2.89 2.90 2.76 4.82 5.71 5.29 5.32 5.07 5.98 6.29 5.12 4.65 4.73 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -7.4 -6.2 -3.4 7.6 12.6 11.4 18.8 15.5 15.0 6.0 0.0 -2.0 -7.4 DAY 18 9 4 2 2 14 20 20 25 5 19 27 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 13.4 15.2 20.4 27.2 33.8 38.4 37.4 36.2 34.4 25.8 17.8 13.8 38.4 DAY 3 24 24 15 26 24 11 3 10 26 3 25 24 HOUR MAXIMUM PRECIPITATION IN MM. 16.0 5.5 2.0 2.0 0.0 0.0 0.0 0.0 0.0 33.0 37.0 20.5 37.0 DAY 29 14 25 18 ** ** ** ** ** 4 6 11 MONTHLY TOTAL PRECIPITATION IN MM. 26.8 9.7 2.2 2.9 0.0 0.0 0.0 0.0 0.0 35.8 56.8 59.9 194.1 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 19.9 1.5 0.0 78.6 NO. OF DAYS WITH PRECIPITATION. 4 4 2 3 0 0 0 0 0 5 6 10 34 NO. OF DAYS PRECIPITATION EQUAL 2 3 1 1 0 0 0 0 0 2 6 10 25 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 0 0 0 0 0 0 0 0 1 2 2 7 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 51 56 42 35 30 27 26 24 30 53 70 72 43 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 44 39 25 23 21 18 17 15 21 41 58 67 32 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 51 42 28 26 22 17 15 15 23 47 68 74 36 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 10 4 0 0 0 0 0 0 0 0 0 0 14 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 1 13 20 24 9 0 0 0 67 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 1 1 0 0 0 0 0 0 0 0 0 0 2 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 11 21 29 30 14 0 0 0 105 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 18 8 0 0 0 0 0 0 0 1 7 54 DATE OF START AND END FREEZING START = 19 NOV. END = 17 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. MEAN AND EXTREMES FOR THE PERIOD 1964 TO 2000 PAGE 1 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPE. IN C. 1.8 3.6 8.4 14.4 18.9 23.9 26.1 25.7 21.9 15.7 9.5 4.8 14.5 SD OF MEAN DAILY TEMPERATURE IN C. 2.60 2.56 2.38 1.46 1.78 1.81 2.55 2.65 1.67 1.64 1.95 2.28 2.11 AVERAGE OF MINIMUM TEMPERATURE IN C. -3.3 -1.9 2.3 7.8 11.9 16.5 18.3 17.9 14.4 9.0 3.7 -0.6 8.0 AVERAGE OF MAXIMUM TEMPERATURE IN C. 6.8 9.1 14.4 20.9 25.9 31.3 33.9 33.3 29.5 22.5 15.2 10.0 21.1 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.1 11.0 12.1 13.2 14.1 14.7 15.5 15.3 15.1 13.7 11.5 10.4 13.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.94 3.24 3.98 5.14 6.48 7.01 7.84 7.44 6.47 5.30 4.18 3.30 5.27 MEAN OF MIXING RATIO AT 09 GMT. 3.71 3.87 4.61 5.39 6.39 6.99 7.82 7.96 7.30 6.12 4.79 4.17 5.75 MEAN OF MIXING RATIO AT 15 GMT. 3.56 3.69 4.49 5.53 6.25 6.74 7.56 7.33 6.80 5.72 4.66 3.86 5.51 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -18.0 -17.5 -13.0 -12.5 1.5 6.0 7.5 4.5 3.5 -3.0 -7.0 -13.5 -18.0 YEAR - DAY 74-14 72- 4 76- 2 68- 8 79- 1 73- 1 75- 3 72-29 72-23 77-24 73-26 74-29 74-14 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 19.0 22.0 28.0 31.5 35.0 38.5 39.6 42.5 42.2 32.0 27.5 20.0 42.5 YEAR - DAY 79- 5 73-19 69-15 73-28 65-27 70-29 64-13 64-21 64- 1 73- 8 74- 3 65- 1 64-21 24 HOUR MAXIMUM PRECIPITATION IN MM. 20.0 30.0 35.0 30.0 28.0 8.0 3.0 5.0 0.3 33.0 37.0 37.1 37.1 YEAR - DAY 80-17 98-10 96- 4 77- 2 79- 7 76- 6 99-28 98- 4 93-27 0- 4 0- 6 89- 4 89- 4 MONTHLY TOTAL PRECIPITATION IN MM. 22.5 21.9 33.0 15.4 14.6 1.7 0.2 0.4 0.0 6.4 10.6 16.6 143.3 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 54.2 22.0 0.4 23.4 NO. OF DAYS WITH PRECIPITATION. 4 4 4 3 3 1 0 0 0 1 2 3 25 NO. OF DAYS PRECIPITATION EQUAL 4 3 4 3 2 0 0 0 0 1 1 3 21 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 1 0 0 0 0 0 0 0 0 1 4 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 69 68 61 53 49 38 38 38 43 52 60 65 53 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 55 50 43 33 30 23 22 23 26 33 41 50 36 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 62 56 48 41 34 25 24 25 29 39 50 59 41 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 13 9 3 0 0 0 0 0 0 0 2 7 34 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 5 12 11 3 0 0 0 31 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 5 21 29 29 15 1 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. 24 19 9 1 0 0 0 0 0 0 6 17 76 DATE OF START AND END FREEZING START = 21 OCT. END = 30 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION NATANZ LATITUDE 33 32 N DATA PROCESSING CENTER LONGITUDE 51 56 E ELEVATION 1800 MET. MEAN AND EXTREMES FOR THE PERIOD 1964 TO 2000 PAGE 2 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE DRY BULB TEMPERATURE. IN C. 2.1 4.0 9.0 15.3 20.4 25.9 28.2 27.4 23.3 16.6 9.8 5.0 15.6 AVERAGE DEW POINT TEMPERATURE. IN C. -5.1 -4.4 -1.9 1.2 3.7 4.8 6.5 5.9 4.4 2.1 -1.1 -3.5 1.1 AVERAGE OF MIXING RATIO IN G/KG 3.40 3.59 4.36 5.35 6.37 6.91 7.74 7.57 6.85 5.71 4.54 3.80 5.52 AVERAGE OF VAPOUR PRESSURE HPA 4.42 4.68 5.69 7.00 8.35 9.08 10.17 9.94 8.99 7.47 5.92 4.96 7.22 AVERAGE OF SATURATION DEFICIT IN HPA 3.09 3.97 6.54 11.31 16.63 25.52 29.55 28.04 21.04 12.42 6.83 4.24 14.10 AVERAGE RELATIVE HUMIDITY IN PERCENT 62 58 51 42 37 29 28 29 33 41 51 58 43 AVERAGE OF MAXIMUM RELATIVE HUMIDITY(%) 74 71 65 56 51 39 39 40 45 53 63 69 55 AVERAGE OF MINIMUM RELATIVE HUMIDITY(%) 51 46 39 31 27 21 20 21 24 31 39 47 33 NO. OF DAYS PRECIPITATION EQUAL 2 2 2 1 1 0 0 0 0 0 1 1 10 OR MORE THAN 5 MM.