IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 1 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. AVERAGE OF MEAN DAILY TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MAX-MIN 1964 -11.9 -1.5 3.9 6.0 12.8 17.8 21.8 20.5 16.7 17.5 1.7 -6.6 33.7 1965 -6.6 -2.4 3.0 5.6 14.3 17.5 20.1 19.9 15.6 9.5 5.0 -0.9 26.7 1966 1.0 -1.3 2.7 7.2 12.8 19.6 22.7 20.7 14.8 ****** 6.1 2.6 ****** 1967 -2.2 -4.3 0.9 5.7 12.0 16.4 21.8 21.5 17.2 11.0 6.2 -0.1 26.1 1968 -2.6 -4.0 3.8 7.0 12.6 17.6 21.4 21.6 16.3 11.5 6.2 2.2 25.6 1969 -3.9 -4.0 7.0 8.2 14.3 19.2 22.4 21.1 15.9 13.5 4.2 3.1 26.4 1970 -2.0 2.6 3.9 11.0 15.0 ****** 22.8 22.6 17.6 11.7 8.0 -2.1 ****** 1971 -1.2 -1.7 5.0 6.8 15.4 19.6 24.0 22.5 17.1 11.2 6.3 -0.2 25.7 1972 -4.2 -8.3 1.2 9.3 11.1 19.0 22.7 20.0 17.5 13.0 6.7 -4.9 31.0 1973 -7.5 0.8 2.7 10.0 14.5 20.7 21.4 23.4 17.3 12.7 5.4 -0.3 30.9 1974 -10.1 -9.1 3.4 8.7 15.9 19.7 21.4 21.7 ****** 10.4 ****** -3.1 ****** 1975 -6.6 -5.2 1.5 7.7 13.6 17.8 23.2 23.3 17.6 8.9 4.1 -4.7 29.9 1976 -2.8 -2.3 -1.4 8.0 13.5 19.5 23.7 23.0 18.5 12.0 5.1 2.2 26.5 1977 -5.1 1.4 8.0 9.4 14.8 20.3 24.4 23.1 18.8 11.4 5.7 2.6 29.5 1978 0.9 2.7 5.6 11.6 15.0 18.5 22.6 22.9 18.5 12.5 3.1 4.6 22.0 1979 0.9 3.1 2.4 11.4 13.6 18.9 23.9 21.1 17.9 13.1 7.5 -0.3 24.2 1980 -2.3 ****** ****** 11.6 14.9 20.3 23.8 23.0 17.5 11.7 7.4 2.6 ****** 1981 0.1 1.1 5.5 10.0 14.3 18.9 23.3 22.2 16.5 10.8 7.5 5.0 23.2 1982 -0.6 -3.7 2.6 11.6 16.1 21.1 22.3 22.8 18.5 12.6 4.0 -5.3 28.0 1983 -3.3 -2.8 0.6 8.2 15.9 21.2 24.6 24.6 19.0 12.2 8.8 0.4 27.9 1984 -2.7 -0.2 5.8 10.7 13.0 21.4 23.8 23.4 17.7 11.3 6.8 -1.8 26.5 1985 1.8 -0.2 3.6 10.6 14.7 20.7 24.1 21.0 18.2 12.0 6.8 0.6 24.3 1986 0.3 0.2 2.8 9.4 13.3 19.0 24.4 21.4 16.8 13.2 2.9 -1.2 25.6 1987 2.1 3.4 3.2 10.2 17.1 21.3 21.8 21.7 18.2 10.3 7.7 0.3 21.5 1988 -2.2 -2.2 5.7 10.2 16.0 20.3 24.3 22.4 18.3 14.0 7.1 3.0 26.5 1989 -7.2 -5.8 3.1 9.8 15.2 21.4 24.3 23.2 17.0 12.8 6.9 1.0 31.5 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 -1.2 -2.8 4.9 11.1 15.0 19.8 ****** 25.5 23.1 17.3 10.0 -0.4 ****** 1992 -8.0 -5.2 ****** 13.9 14.9 20.4 23.3 22.4 16.5 10.8 4.8 0.8 ****** 1993 -3.0 ****** ****** ****** 14.4 20.7 23.4 24.3 ****** ****** ****** ****** ****** 1994 ****** ****** ****** ****** ****** 19.9 25.6 18.8 12.2 8.9 7.9 1.3 ****** 1995 1.4 3.9 8.0 12.1 ****** 15.8 21.2 20.8 16.1 13.4 ****** 1.0 ****** 1996 -1.6 1.2 2.3 9.3 16.4 21.6 22.7 22.1 18.7 12.2 6.5 3.0 24.3 1997 -0.1 -3.3 0.3 7.9 13.1 19.1 24.2 24.8 18.0 13.2 4.2 0.3 28.1 1998 -4.5 -3.8 1.8 10.5 14.2 20.6 23.9 23.2 19.4 11.9 9.3 9.1 28.4 1999 0.6 2.4 2.9 9.9 15.5 23.7 22.8 24.0 18.5 13.4 5.2 3.0 23.4 2000 -2.2 -2.5 3.9 12.1 16.7 19.8 23.8 22.9 19.0 11.2 5.1 0.1 26.3 2001 -0.3 1.3 6.4 11.8 15.1 19.2 22.9 22.6 18.0 13.7 7.8 5.0 23.2 2002 -2.6 2.4 5.7 9.8 15.2 19.5 22.1 22.4 17.9 14.5 6.0 1.7 25.0 2003 0.3 -0.1 2.7 9.3 13.2 18.5 22.7 20.4 16.7 12.9 4.8 -1.4 24.1 MEAN -2.6 -1.4 3.6 9.6 14.5 19.6 23.0 22.3 17.5 12.3 6.1 0.6 25.6 SD 3.35 3.27 2.16 1.96 1.35 1.52 1.17 1.44 1.66 1.83 1.82 3.10 2.05 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 2 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. AVERAGE OF MINIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 -19.0 -6.8 -2.2 -0.8 3.5 7.3 10.0 8.7 5.6 12.2 -5.8 -14.0 -0.1 1965 -12.9 -8.9 -4.2 -1.9 5.1 6.8 9.0 9.6 5.6 1.4 -1.8 -9.2 -0.1 1966 -6.6 -8.8 -5.0 -0.8 3.5 8.4 11.6 9.5 3.7 4.8 -1.8 -4.2 1.2 1967 -9.5 -10.0 -5.6 -1.1 4.3 6.5 10.0 11.8 8.6 3.1 0.0 -6.5 1.0 1968 -9.0 -10.4 -2.6 0.7 5.5 9.1 11.7 12.5 6.6 2.9 0.4 -2.5 2.1 1969 -10.0 -10.4 2.4 2.2 7.5 11.0 13.7 13.3 7.6 6.8 -2.4 -2.5 3.3 1970 -7.5 -3.0 -2.3 4.3 7.3 ****** 14.6 13.4 8.1 2.7 1.6 -8.8 ****** 1971 -7.7 -7.0 -0.6 1.0 8.7 10.9 17.1 13.9 8.5 2.6 0.2 -6.2 3.4 1972 -9.8 -16.0 -4.1 2.9 5.1 11.2 14.0 12.1 8.3 4.2 -0.1 -11.0 1.4 1973 -15.5 -6.6 -5.5 3.6 6.4 11.2 12.4 16.2 7.6 3.7 -1.7 -7.3 2.0 1974 -19.1 -18.7 -2.7 3.1 9.6 10.6 13.4 13.7 ****** 1.5 ****** -12.5 ****** 1975 -15.7 -14.8 -7.5 -1.6 5.0 8.5 13.8 14.0 8.4 -2.2 -2.5 -13.7 -0.7 1976 -9.9 -6.9 -7.9 2.6 6.8 11.3 15.2 15.5 9.6 5.2 -1.5 -3.1 3.1 1977 -10.7 -5.5 2.1 3.6 8.7 11.7 15.6 15.3 10.0 4.9 -0.4 -1.3 4.5 1978 -4.0 -2.7 0.3 6.0 8.2 10.0 14.6 14.6 8.7 3.9 -2.7 0.1 4.7 1979 -3.5 -2.1 -3.1 5.4 7.7 11.3 16.2 13.5 8.9 5.6 -0.6 -5.1 4.5 1980 -6.6 ****** ****** 6.2 8.1 11.8 16.4 14.7 8.2 2.4 2.0 -2.8 ****** 1981 -4.6 -3.4 0.4 4.1 8.2 12.2 16.2 13.5 7.6 3.5 1.6 -0.1 4.9 1982 -6.3 -8.9 -3.5 4.6 9.7 12.8 13.5 13.7 9.3 6.4 -1.9 -12.2 3.1 1983 -9.2 -8.9 -5.4 2.2 9.5 12.2 15.2 15.6 9.4 2.2 1.4 -5.5 3.2 1984 -9.3 -6.1 0.3 3.9 6.4 13.0 15.7 14.1 7.9 2.8 1.7 -6.6 3.7 1985 -3.5 -4.7 -1.6 5.3 7.1 12.4 15.7 13.1 8.4 3.2 1.5 -4.5 4.4 1986 -4.6 -5.2 -3.2 3.2 7.4 10.9 16.1 13.3 7.5 5.1 -3.2 -6.7 3.4 1987 -3.6 -2.3 -1.3 4.1 9.9 12.3 13.0 11.9 8.6 4.4 0.9 -5.3 4.4 1988 -6.4 -7.8 0.4 4.2 8.8 12.2 15.1 13.7 8.4 5.6 0.5 -2.3 4.4 1989 -13.4 -12.1 -1.6 3.3 8.5 12.6 15.4 14.8 8.0 3.8 1.0 -4.5 3.0 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 -6.6 -8.0 -0.6 4.3 6.6 10.9 ****** 15.4 13.0 9.0 0.4 -9.6 ****** 1992 -17.0 -12.1 ****** 9.0 8.6 13.8 14.5 14.4 7.5 1.6 -1.9 -3.2 ****** 1993 -6.8 ****** ****** ****** 7.3 12.3 15.1 16.4 ****** ****** ****** ****** ****** 1994 ****** ****** ****** ****** ****** 11.9 16.5 10.3 5.2 3.8 3.5 -2.3 ****** 1995 -4.2 -1.7 2.7 6.5 ****** 8.2 9.7 8.9 4.6 4.9 ****** -4.0 ****** 1996 -7.1 -3.6 -2.3 3.9 10.5 15.1 15.7 13.8 9.7 3.8 -0.8 -4.3 4.5 1997 -6.5 -11.7 -6.0 1.3 6.4 11.3 15.0 16.1 9.3 6.0 -1.5 -6.0 2.8 1998 -11.4 -10.7 -5.5 3.9 7.3 12.7 15.7 15.7 11.1 4.1 3.0 4.1 4.2 1999 -4.8 -4.2 -3.6 3.6 7.1 18.1 14.5 16.6 9.3 5.6 -1.2 -4.0 4.8 2000 -8.8 -10.4 -2.7 5.3 8.9 10.1 15.5 14.2 10.2 3.4 -0.2 -5.7 3.3 2001 -7.5 -3.5 -0.5 4.8 7.7 9.6 14.2 13.7 9.2 6.0 1.7 1.0 4.7 2002 -9.2 -2.8 -2.2 3.9 8.0 11.2 13.2 12.7 6.7 6.4 0.4 -3.9 3.7 2003 -6.0 -6.0 -4.2 1.3 5.2 8.8 10.9 8.9 5.3 4.2 -2.7 -7.9 1.5 MEAN -8.8 -7.6 -2.5 3.2 7.3 11.1 14.1 13.4 8.1 4.2 -0.4 -5.4 3.1 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 3 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. AVERAGE OF MAXIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 -4.8 3.7 10.0 12.9 22.1 28.4 33.5 32.3 27.7 22.9 9.3 0.7 16.6 1965 -0.3 4.1 10.2 13.0 23.5 28.2 31.1 30.1 25.6 17.5 11.9 7.5 16.9 1966 8.7 6.2 10.4 15.1 22.1 30.8 33.7 31.8 25.9 ****** 13.9 9.4 ****** 1967 5.0 1.5 7.4 12.5 19.8 26.3 33.6 31.3 25.7 18.9 12.4 6.2 16.7 1968 3.9 2.4 10.1 13.4 19.7 26.0 31.1 30.8 25.9 20.0 12.0 7.0 16.9 1969 2.1 2.4 11.6 14.2 21.1 27.3 31.2 28.9 24.2 20.2 10.8 8.6 16.9 1970 3.4 8.1 10.1 17.6 22.6 ****** 30.9 31.9 27.0 20.7 14.3 4.5 ****** 1971 5.2 3.6 10.6 12.7 22.1 28.3 30.9 31.1 25.7 19.9 12.4 5.7 17.3 1972 1.4 -0.7 6.5 15.7 17.1 26.7 31.4 27.9 26.6 21.8 13.5 1.2 15.8 1973 0.5 8.2 10.9 16.3 22.5 30.1 30.5 30.6 27.0 21.6 12.4 6.8 18.1 1974 -0.8 0.4 9.4 14.3 22.2 28.8 29.4 29.7 ****** 19.4 ****** 6.3 ****** 1975 2.5 4.4 10.5 17.0 22.2 27.0 32.5 32.5 26.9 20.0 10.8 4.3 17.6 1976 4.3 2.2 5.1 13.5 20.2 27.8 32.2 30.5 27.4 18.9 11.7 7.5 16.8 1977 0.5 8.3 14.0 15.2 21.0 29.0 33.3 31.0 27.5 17.9 11.9 6.5 18.0 1978 5.7 8.2 10.8 17.2 21.8 27.0 30.8 31.2 28.3 21.1 9.0 9.1 18.4 1979 5.2 8.3 7.9 17.4 19.4 26.6 31.6 28.7 26.9 20.5 15.6 4.4 17.7 1980 2.0 ****** ****** 17.1 21.7 28.8 31.1 31.2 26.8 20.7 12.7 8.1 ****** 1981 5.0 5.4 10.5 15.8 20.4 25.6 30.5 31.0 25.6 18.1 13.5 10.3 17.6 1982 5.0 1.5 8.5 18.6 22.7 29.4 31.2 31.8 27.7 18.8 9.9 1.7 17.2 1983 2.5 3.3 6.9 14.0 22.3 30.2 34.0 33.6 28.6 22.2 16.2 6.3 18.3 1984 3.9 5.7 11.3 17.5 19.6 29.9 31.8 32.7 27.5 19.6 11.8 3.2 17.9 1985 7.1 4.3 8.9 15.9 22.2 29.0 32.7 29.0 27.7 20.8 12.1 5.7 18.0 1986 5.3 5.6 8.0 15.5 19.5 27.1 32.6 29.4 26.2 21.3 9.1 4.1 17.0 1987 7.8 9.1 7.7 16.2 24.3 30.3 30.5 31.4 27.9 16.2 14.5 7.5 18.6 1988 2.0 3.3 10.9 16.3 23.2 28.3 33.4 31.1 28.2 22.4 13.7 8.4 18.4 1989 -0.8 0.4 7.9 16.2 21.8 30.2 33.2 31.6 26.0 21.9 12.7 6.5 17.3 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 4.1 2.4 10.3 17.8 23.5 28.7 ****** 35.6 33.0 25.7 19.6 9.0 ****** 1992 1.0 1.7 ****** 18.9 21.1 27.0 32.1 30.4 25.5 20.0 11.4 4.8 ****** 1993 0.8 ****** ****** ****** 21.6 29.2 31.7 32.3 ****** ****** ****** ****** ****** 1994 ****** ****** ****** ****** ****** 27.9 34.8 27.3 19.1 14.0 12.3 4.8 ****** 1995 7.0 9.5 13.2 17.8 ****** 23.5 32.7 32.7 27.5 20.3 14.2 5.9 ****** 1996 3.4 5.9 6.8 14.7 22.2 28.2 29.6 30.4 27.8 20.7 13.8 10.3 17.8 1997 6.4 5.1 6.6 14.4 19.8 26.9 33.4 33.5 26.7 20.4 10.0 6.5 17.5 1998 2.4 3.4 8.9 17.1 21.1 28.5 31.9 30.6 27.7 19.8 15.7 14.0 18.4 1999 5.9 9.0 9.4 16.1 23.9 29.3 31.1 31.4 27.8 21.2 11.6 10.0 18.9 2000 4.4 5.4 10.6 18.8 24.6 29.5 32.0 31.6 27.8 18.9 10.4 6.0 18.3 2001 6.9 6.0 13.3 18.8 22.4 28.8 31.6 31.5 26.9 21.4 13.9 9.0 19.2 2002 4.1 7.6 13.4 15.8 22.3 27.8 31.0 32.1 29.1 22.6 11.7 7.3 18.7 2003 6.6 5.9 9.6 17.3 21.2 28.3 34.5 32.0 28.1 21.6 12.2 5.2 18.5 MEAN 3.6 4.8 9.7 15.9 21.7 28.2 32.0 31.1 27.0 20.3 12.6 6.6 17.8 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 4 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 14.2 10.5 12.2 13.7 18.6 21.1 23.5 23.6 22.1 10.7 15.1 14.7 16.7 1965 12.6 13.0 14.4 14.9 18.4 21.5 22.1 20.5 20.0 16.1 13.7 16.7 17.0 1966 15.3 15.0 15.4 15.9 18.6 22.4 22.1 22.3 22.2 ****** 15.6 13.6 ****** 1967 14.5 11.5 13.0 13.6 15.5 19.8 23.6 19.5 17.1 15.8 12.4 12.7 15.7 1968 12.9 12.8 12.7 12.7 14.2 16.9 19.4 18.3 19.3 17.1 11.6 9.5 14.8 1969 12.1 12.8 9.2 12.0 13.6 16.3 17.5 15.6 16.6 13.4 13.1 11.1 13.6 1970 10.9 11.1 12.4 13.3 15.3 ****** 16.3 18.5 18.9 18.0 12.7 13.3 ****** 1971 12.9 10.6 11.2 11.7 13.4 17.4 13.8 17.2 17.2 17.3 12.2 11.9 13.9 1972 11.2 15.3 10.6 12.8 12.0 15.5 17.4 15.8 18.3 17.6 13.6 12.2 14.4 1973 16.0 14.8 16.4 12.7 16.1 18.9 18.1 14.4 19.4 17.9 14.1 14.1 16.1 1974 18.3 19.1 12.1 11.1 12.6 18.2 16.0 16.0 ****** 17.9 ****** 18.8 ****** 1975 18.2 19.2 18.0 18.6 17.2 18.5 18.7 18.5 18.5 22.2 13.3 18.0 18.2 1976 14.2 9.1 13.0 10.9 13.4 16.6 17.0 15.0 17.8 13.7 13.2 10.6 13.7 1977 11.2 13.8 11.9 11.6 12.3 17.3 17.7 15.7 17.5 13.0 12.3 7.8 13.5 1978 9.7 10.9 10.5 11.2 13.6 17.0 16.2 16.6 19.6 17.2 11.7 9.0 13.6 1979 8.7 10.4 11.0 12.0 11.7 15.4 15.4 15.2 18.0 14.9 16.2 9.5 13.2 1980 8.6 ****** ****** 10.9 13.6 17.0 14.7 16.5 18.5 18.3 10.7 10.9 ****** 1981 9.6 8.8 10.1 11.7 12.2 13.4 14.3 17.5 18.0 14.6 11.9 10.4 12.7 1982 11.3 10.4 12.0 14.0 13.0 16.6 17.7 18.1 18.4 12.4 11.8 13.9 14.1 1983 11.7 12.2 12.3 11.8 12.8 18.0 18.8 18.0 19.2 20.0 14.8 11.8 15.1 1984 13.2 11.8 11.0 13.6 13.2 16.9 16.1 18.6 19.6 16.8 10.1 9.8 14.2 1985 10.6 9.0 10.5 10.6 15.1 16.6 17.0 15.9 19.3 17.6 10.6 10.2 13.6 1986 9.9 10.8 11.2 12.3 12.1 16.2 16.5 16.1 18.7 16.2 12.3 10.8 13.6 1987 11.4 11.4 9.0 12.1 14.4 18.0 17.5 19.5 19.3 11.8 13.6 12.8 14.2 1988 8.4 11.1 10.5 12.1 14.4 16.1 18.3 17.4 19.8 16.8 13.2 10.7 14.1 1989 12.6 12.5 9.5 12.9 13.3 17.6 17.8 16.8 18.0 18.1 11.7 11.0 14.3 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 10.7 10.4 10.9 13.5 16.9 17.8 ****** 20.2 20.0 16.7 19.2 18.6 ****** 1992 18.0 13.8 ****** 9.9 12.5 13.3 17.6 16.0 18.0 18.4 13.3 8.0 ****** 1993 7.6 ****** ****** ****** 14.3 16.9 16.6 15.9 ****** ****** ****** ****** ****** 1994 ****** ****** ****** ****** ****** 16.0 18.3 17.0 13.9 10.2 8.8 7.1 ****** 1995 11.2 11.2 10.5 11.3 ****** 15.3 23.0 23.8 22.9 15.4 ****** 9.9 ****** 1996 10.5 9.5 9.1 10.8 11.7 13.1 13.9 16.6 18.1 16.9 14.6 14.6 13.3 1997 12.9 16.8 12.6 13.1 13.4 15.6 18.4 17.4 17.4 14.4 11.5 12.5 14.7 1998 13.8 14.1 14.4 13.2 13.8 15.8 16.2 14.9 16.6 15.7 12.7 9.9 14.3 1999 10.7 13.2 13.0 12.5 16.8 11.2 16.6 14.8 18.5 15.6 12.8 14.0 14.1 2000 13.2 15.8 13.3 13.5 15.7 19.4 16.5 17.4 17.6 15.5 10.6 11.7 15.0 2001 14.4 9.5 13.8 14.0 14.7 19.1 17.4 17.8 17.7 15.4 12.2 8.0 14.5 2002 13.3 10.4 15.6 11.9 14.3 16.6 17.8 19.4 22.4 16.2 11.3 11.2 15.0 2003 12.6 11.9 13.8 16.0 16.0 19.5 23.6 23.1 22.8 17.4 14.9 13.1 17.1 MEAN 12.3 12.3 12.2 12.7 14.3 17.1 17.9 17.7 18.8 16.0 12.9 12.0 14.7 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 5 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 03 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 0.68 2.54 3.66 3.78 3.95 4.92 5.49 5.57 5.15 3.97 2.75 1.60 3.67 1965 1.39 2.21 3.15 3.63 4.54 4.25 5.24 6.05 4.75 4.38 3.49 2.07 3.76 1966 2.79 2.21 3.05 3.55 4.35 6.71 8.87 8.61 5.55 5.03 2.96 2.56 4.69 1967 2.00 1.71 2.65 3.37 5.23 4.69 5.03 4.73 5.03 4.14 3.41 1.47 3.62 1968 1.53 ****** 2.61 4.44 5.75 5.62 5.07 4.98 3.83 4.32 4.42 3.22 ****** 1969 1.93 2.71 4.49 4.81 5.82 5.28 6.68 5.85 4.89 4.80 3.56 3.30 4.51 1970 2.59 3.05 3.65 4.21 4.57 ****** 5.57 4.76 3.46 2.84 3.39 2.15 ****** 1971 2.34 2.94 3.66 4.36 5.72 5.36 6.28 6.28 4.82 3.24 3.76 2.41 4.26 1972 1.83 1.16 3.48 4.94 5.52 6.10 6.26 7.49 6.16 4.53 3.82 1.46 4.40 1973 ****** 3.17 3.33 4.61 5.30 6.48 6.30 12.25 6.32 4.46 3.21 2.43 ****** 1974 ****** ****** 4.00 4.57 6.30 6.79 9.09 9.09 ****** 4.97 ****** 1.58 ****** 1975 0.78 2.05 2.62 4.17 6.18 9.84 10.39 10.71 7.35 2.49 3.03 1.31 5.08 1976 2.69 2.32 2.47 4.96 6.46 8.03 11.32 8.46 6.68 5.97 3.89 3.39 5.55 1977 1.91 2.90 4.43 5.26 7.31 8.89 9.54 9.43 6.70 5.52 4.01 3.78 5.81 1978 2.76 2.95 3.73 4.45 6.05 7.12 8.54 8.41 6.04 4.77 3.10 3.38 5.11 1979 3.39 3.23 3.62 5.29 6.89 8.65 10.06 8.37 6.02 5.63 3.75 3.02 5.66 1980 2.64 ****** ****** 5.71 6.49 8.05 10.65 9.11 6.18 4.43 4.67 2.87 ****** 1981 2.72 2.91 3.87 5.01 6.47 8.19 10.76 8.60 5.64 5.10 4.22 3.39 5.57 1982 1.65 1.06 2.62 5.53 7.60 8.87 7.95 8.67 5.98 5.74 3.10 1.24 5.00 1983 1.42 1.34 1.74 4.48 7.45 8.40 10.76 10.91 7.06 4.10 3.72 2.12 5.29 1984 1.84 1.66 3.42 4.64 5.85 9.08 9.59 8.65 5.72 3.66 4.24 2.03 5.03 1985 2.86 2.24 3.46 5.13 5.68 7.59 8.92 7.07 3.99 3.47 3.56 2.23 4.68 1986 2.74 1.98 2.71 5.08 5.26 5.93 7.41 6.45 3.60 4.02 2.62 1.67 4.12 1987 2.45 2.83 3.45 4.53 6.21 6.15 7.12 6.01 4.99 5.05 3.37 2.31 4.54 1988 1.60 1.30 3.47 5.01 5.21 5.58 6.67 6.35 4.35 3.90 3.45 2.72 4.13 1989 1.12 1.96 3.48 4.43 5.52 5.20 5.91 5.93 4.00 3.61 4.28 2.25 3.97 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 2.64 2.74 3.88 4.30 4.35 5.49 ****** 4.66 5.52 6.33 3.68 2.59 ****** 1992 1.66 1.89 ****** 6.90 7.12 8.37 7.19 6.46 4.43 3.46 3.73 3.82 ****** 1993 ****** ****** ****** ****** 5.80 5.83 5.97 17.07 ****** ****** ****** ****** ****** 1994 ****** ****** ****** ****** ****** 6.70 11.72 6.25 5.74 5.86 5.61 3.43 ****** 1995 3.28 3.50 4.29 6.44 ****** 8.43 7.73 7.11 5.88 5.65 4.64 3.28 ****** 1996 2.82 3.83 4.29 5.16 7.02 7.20 7.20 6.03 4.46 4.49 3.65 3.65 4.98 1997 3.57 2.14 3.78 4.81 5.55 6.02 6.54 5.52 4.33 4.49 4.75 3.79 4.61 1998 3.07 2.49 3.61 4.77 6.28 5.49 7.00 6.83 5.15 4.10 3.34 3.55 4.64 1999 2.94 3.54 3.30 4.99 4.57 4.80 6.45 5.77 4.53 4.37 3.58 3.41 4.35 2000 2.36 2.18 3.66 4.30 4.50 4.11 5.40 4.42 4.37 4.37 4.16 3.03 3.91 2001 2.59 3.57 3.85 3.70 4.50 6.15 6.03 4.72 4.62 4.24 3.60 4.07 4.30 2002 2.10 3.39 3.63 4.44 4.50 4.13 5.59 4.96 3.47 3.92 4.09 3.21 3.95 2003 2.49 3.08 3.44 4.64 6.35 6.89 7.96 7.27 5.49 5.27 3.58 2.32 4.90 MEAN 2.27 2.50 3.45 4.72 5.74 6.62 7.64 7.33 5.20 4.50 3.74 2.69 4.70 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 6 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 09 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 1.50 3.62 3.89 3.64 4.20 5.28 5.42 5.45 7.74 4.33 2.95 2.37 4.20 1965 2.76 3.58 3.92 3.65 4.71 4.56 4.97 4.90 5.16 5.12 4.45 3.15 4.24 1966 3.91 3.60 3.97 4.12 4.79 7.45 9.40 6.47 5.17 4.89 3.68 3.62 5.09 1967 3.03 2.82 4.38 4.11 5.04 5.11 5.55 5.31 5.95 4.62 4.12 2.82 4.40 1968 2.24 2.67 3.75 4.51 5.27 5.39 5.86 5.88 5.22 5.53 4.63 4.01 4.58 1969 2.71 2.84 5.06 4.87 6.03 5.67 6.67 6.02 6.63 5.33 3.89 3.51 4.94 1970 3.62 4.03 3.81 4.20 3.75 ****** 5.57 5.01 4.61 3.18 3.71 3.26 ****** 1971 3.52 3.57 4.22 4.74 6.04 5.80 7.26 7.15 5.83 3.66 5.03 3.13 5.00 1972 3.03 2.83 4.68 5.42 5.46 8.72 8.14 10.14 10.56 7.58 4.93 3.53 6.25 1973 3.03 4.69 4.37 4.85 7.96 11.35 11.06 21.97 16.29 8.05 4.83 4.28 8.56 1974 1.46 2.16 5.35 7.13 10.60 10.86 12.37 17.80 ****** 6.56 ****** 4.03 ****** 1975 1.35 2.56 5.00 5.30 8.45 14.93 17.92 20.75 12.30 5.08 4.73 3.26 8.47 1976 4.08 3.60 3.65 6.54 8.45 9.60 16.66 11.12 10.53 8.15 5.42 4.60 7.70 1977 3.18 4.57 5.51 7.06 9.10 11.38 14.50 13.48 10.46 7.75 5.78 4.46 8.10 1978 3.71 4.48 4.93 5.97 8.43 10.48 12.92 12.72 10.44 7.27 4.37 4.77 7.54 1979 4.23 4.96 5.03 7.24 9.73 11.88 13.82 11.83 10.53 8.31 5.83 4.02 8.12 1980 3.30 ****** ****** 7.23 9.44 12.80 14.26 14.45 9.59 6.43 6.62 4.74 ****** 1981 4.00 4.20 5.52 7.72 9.34 12.48 16.98 15.54 9.44 8.32 5.88 5.14 8.71 1982 3.39 2.89 4.51 8.67 12.08 15.79 13.38 14.28 10.26 6.75 4.79 2.67 8.29 1983 3.27 3.19 4.19 6.80 11.71 17.20 21.81 22.68 16.38 10.32 6.79 3.73 10.67 1984 3.43 3.63 5.73 8.51 9.89 18.21 17.92 16.25 11.89 6.35 5.56 3.56 9.24 1985 4.69 4.27 4.59 7.60 11.26 16.26 18.02 12.27 9.17 5.21 6.29 4.30 8.66 1986 3.87 4.01 4.50 6.73 7.32 7.33 8.37 7.11 4.62 5.26 3.99 3.69 5.57 1987 4.31 4.38 4.78 6.10 9.16 7.92 8.56 6.91 6.47 5.91 4.01 3.51 6.00 1988 2.89 3.08 4.58 5.34 6.11 4.89 6.92 6.65 4.60 4.38 3.77 3.54 4.73 1989 2.32 2.32 4.42 4.44 5.17 4.43 5.29 4.63 4.17 3.95 4.31 3.84 4.11 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.63 3.31 4.55 4.51 4.29 5.10 ****** 6.43 8.51 5.60 4.37 3.75 ****** 1992 3.05 3.45 ****** 8.44 6.11 8.60 7.96 4.97 3.96 3.27 4.90 4.69 ****** 1993 3.94 ****** ****** ****** 6.18 6.63 8.04 24.99 ****** ****** ****** ****** ****** 1994 ****** ****** ****** ****** ****** 6.14 14.56 8.17 7.17 7.51 7.11 5.30 ****** 1995 4.51 4.60 5.20 7.25 ****** 10.08 8.24 9.18 8.70 7.62 7.00 4.62 ****** 1996 3.91 4.72 5.36 5.52 6.99 8.27 8.12 7.31 4.62 4.64 5.51 4.59 5.80 1997 4.30 4.54 4.08 4.74 5.21 5.96 6.31 5.75 4.98 4.93 4.72 4.07 4.97 1998 4.03 4.12 4.25 4.78 5.33 4.89 5.61 6.46 5.08 4.24 3.38 3.45 4.64 1999 3.73 3.50 3.60 5.35 4.42 4.00 6.01 5.74 4.44 3.78 4.02 3.37 4.33 2000 4.02 4.14 3.23 4.71 4.34 4.23 4.83 4.80 3.98 3.97 4.15 3.92 4.19 2001 3.08 3.89 3.64 3.58 4.52 6.80 5.40 4.77 4.48 4.29 3.91 4.66 4.42 2002 3.94 3.50 3.13 4.32 4.40 4.26 5.52 4.52 4.49 4.10 3.94 4.06 4.18 2003 3.51 3.87 3.60 5.58 7.08 7.19 9.91 9.18 6.27 5.45 4.32 4.02 5.83 MEAN 3.39 3.68 4.43 5.72 6.99 8.63 10.01 9.98 7.59 5.73 4.81 3.90 6.23 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 7 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 15 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 1.21 3.09 3.53 3.25 4.00 3.84 4.48 4.73 6.14 3.73 2.54 1.96 3.54 1965 1.99 3.08 3.44 3.17 4.29 3.62 4.56 4.63 4.48 4.60 4.07 2.66 3.71 1966 3.38 3.15 3.49 3.58 4.23 6.05 8.04 5.57 4.79 4.96 3.36 2.96 4.46 1967 2.48 1.96 2.85 3.78 4.82 4.75 5.42 4.84 4.78 4.69 4.08 1.85 3.86 1968 1.75 1.84 2.76 4.49 5.59 4.79 5.51 4.64 4.39 4.87 4.52 3.74 4.08 1969 2.47 3.19 4.78 4.75 5.12 5.35 5.73 5.51 5.45 4.99 3.49 3.46 4.52 1970 2.76 3.23 3.95 3.97 3.75 ****** 4.57 4.00 3.26 2.78 3.60 2.80 ****** 1971 3.02 3.26 4.21 4.73 5.39 5.09 6.14 6.21 5.28 3.44 4.74 3.12 4.55 1972 2.36 1.81 4.04 5.23 5.40 6.76 6.32 8.32 8.97 6.66 5.02 2.60 5.29 1973 2.19 4.12 4.20 5.11 6.43 8.41 8.47 19.07 11.98 5.89 4.37 3.84 7.01 1974 ****** ****** 4.50 5.22 8.71 8.60 11.04 14.55 ****** 6.45 ****** 2.67 ****** 1975 1.46 2.08 4.15 5.36 7.88 12.92 14.00 16.28 9.73 5.10 4.08 2.66 7.14 1976 3.65 3.26 3.37 5.58 6.87 8.58 15.17 10.04 9.51 7.34 5.08 4.65 6.93 1977 2.72 4.20 4.97 6.52 8.20 9.85 12.42 11.25 9.60 7.15 5.61 4.58 7.26 1978 3.60 4.17 4.83 5.44 7.39 9.15 11.34 11.09 9.45 6.36 4.15 4.49 6.79 1979 3.81 4.38 4.84 6.46 8.17 10.75 12.38 10.37 9.01 7.37 5.54 3.92 7.25 1980 2.43 ****** ****** 6.29 8.76 11.45 12.22 12.16 9.03 5.92 6.29 4.14 ****** 1981 3.75 3.85 5.06 6.38 7.87 10.42 14.10 13.53 8.63 7.28 5.24 4.95 7.59 1982 3.07 1.93 4.03 7.45 10.22 13.50 11.27 11.88 8.98 6.20 4.59 1.78 7.07 1983 2.37 2.32 3.62 6.16 10.06 14.85 18.62 18.89 14.38 8.79 5.97 3.10 9.10 1984 2.09 2.80 5.00 7.12 8.20 14.67 14.42 13.02 10.53 5.44 5.23 3.06 7.63 1985 4.00 3.45 4.21 6.26 9.30 13.67 13.92 10.46 8.19 4.54 4.80 3.61 7.20 1986 3.53 3.52 3.88 6.09 5.94 6.37 6.32 5.69 4.73 4.78 3.70 2.66 4.77 1987 3.78 4.03 4.36 5.17 7.20 6.38 7.29 5.78 5.49 5.07 3.58 3.33 5.12 1988 2.25 2.56 4.02 4.75 4.77 4.28 5.78 5.87 4.11 3.79 3.76 3.09 4.08 1989 1.71 1.68 4.20 4.22 4.75 3.96 4.70 3.97 3.30 4.19 4.25 3.50 3.70 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 2.99 2.45 3.96 4.10 3.89 4.93 ****** 11.39 8.58 6.87 5.45 2.33 ****** 1992 1.68 2.06 ****** 6.52 6.45 6.80 6.28 5.73 3.39 2.94 4.14 3.68 ****** 1993 3.44 ****** ****** ****** 6.09 5.87 8.69 20.55 ****** ****** ****** ****** ****** 1994 ****** ****** ****** ****** ****** 4.59 11.42 5.26 5.36 6.13 5.78 3.78 ****** 1995 4.25 4.18 4.46 6.21 ****** 7.17 6.69 7.58 5.92 5.85 5.28 3.65 ****** 1996 3.18 3.99 4.80 4.55 5.84 7.09 6.67 5.34 3.51 3.70 5.34 4.24 4.85 1997 4.01 4.00 3.85 4.15 4.82 5.13 5.52 5.00 3.94 4.29 4.64 4.05 4.45 1998 3.48 3.15 4.12 4.49 4.85 5.22 5.56 6.18 4.45 4.06 2.98 3.27 4.32 1999 3.50 3.25 3.46 4.38 3.60 3.26 5.46 4.86 3.67 3.17 3.44 3.54 3.80 2000 3.29 3.54 2.71 4.03 3.26 3.18 3.97 4.00 3.65 3.49 3.65 3.69 3.54 2001 2.84 3.61 3.32 3.34 3.43 5.92 4.10 3.73 3.68 3.56 3.61 4.04 3.77 2002 2.88 3.33 3.22 4.01 3.89 3.11 4.48 3.78 3.41 3.07 3.58 3.71 3.54 2003 2.74 3.59 3.53 5.02 5.61 5.96 8.18 7.10 5.00 4.25 4.13 3.39 4.87 MEAN 2.87 3.15 4.00 5.07 6.09 7.28 8.46 8.54 6.46 5.10 4.43 3.39 5.40 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 8 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 -30.0 20 -19.5 8 -5.5 9 -5.5 9 -1.0 1 4.5 9 8.5 3 6.0 19 2.0 20 5.4 31 -12.5 28 -27.0 20 -30.0 1965 -24.0 6 -20.0 5 -10.5 15 -8.0 5 -2.5 4 5.0 17 5.0 7 8.0 28 2.0 22 -3.0 25 -5.0 14 -15.5 22 -24.0 1966 -9.0 15 -11.0 16 -11.0 2 -5.5 1 -1.0 6 5.5 16 10.5 5 6.5 27 -0.5 21 3.0 28 -9.5 26 -12.0 23 -12.0 1967 -24.0 23 -20.0 28 -15.0 1 -16.5 2 -1.0 1 1.5 6 6.5 1 9.0 1 5.5 30 -2.0 17 -10.0 30 -18.0 25 -24.0 1968 -19.0 19 -28.0 5 -12.0 24 -2.5 4 0.5 1 7.0 10 8.5 13 9.0 31 4.0 20 -1.0 28 -3.5 19 -9.0 21 -28.0 1969 -24.0 31 -25.5 16 -1.5 24 -6.0 14 3.5 7 6.0 2 9.0 8 7.0 29 2.5 13 1.5 31 -8.5 17 -11.0 29 -25.5 1970 -24.0 29 -9.0 2 -6.5 6 -1.0 10 2.5 7 ***** ** 10.0 26 8.5 25 4.5 20 -3.0 25 -3.5 26 -21.0 16 ***** 1971 -16.0 31 -18.5 3 -11.5 16 -2.5 2 4.5 4 5.0 5 12.0 26 10.0 3 2.5 21 -2.0 10 -7.0 20 -21.0 21 -21.0 1972 -17.0 2 -26.0 4 -20.0 11 -2.5 7 0.5 10 7.5 15 10.5 1 8.5 28 4.5 12 0.5 31 -4.5 21 -28.0 26 -28.0 1973 -25.5 19 -18.5 3 -19.0 10 -5.0 3 1.5 7 4.5 6 8.5 8 10.5 29 3.5 22 0.5 25 -13.0 8 -19.0 31 -25.5 1974 -28.5 13 -34.5 5 -10.5 5 -2.5 11 3.0 1 6.0 4 10.0 21 11.5 30 ***** ** -3.5 20 ***** ** -16.5 29 ***** 1975 -20.5 30 -20.0 2 -14.5 8 -12.0 4 2.5 2 7.0 3 10.5 15 9.5 29 4.5 30 -10.0 28 -10.5 30 -25.0 31 -25.0 1976 -28.0 1 -15.5 16 -23.0 2 -2.5 7 2.0 1 7.0 7 11.5 5 10.5 28 5.5 20 1.0 30 -7.5 30 -14.5 24 -28.0 1977 -19.5 24 -16.5 3 -2.0 15 -1.0 17 6.0 3 8.0 1 8.5 1 11.0 19 7.0 20 -5.0 27 -6.5 28 -10.5 30 -19.5 1978 -12.5 15 -14.0 27 -11.0 1 -2.0 15 1.0 4 3.5 3 10.5 9 10.0 21 3.0 30 2.0 10 -9.0 5 -7.0 18 -14.0 1979 -16.5 12 -8.0 20 -11.5 1 -4.0 28 4.0 11 8.5 1 11.5 6 8.0 29 5.5 28 0.5 30 -6.5 23 -22.0 24 -22.0 1980 -18.0 1 ***** ** ***** ** -2.5 17 2.5 6 8.0 10 13.5 1 12.0 19 1.5 26 -5.0 19 -5.0 26 -12.5 20 ***** 1981 -17.0 14 -16.0 12 -10.0 5 -8.5 2 1.0 2 7.5 7 9.5 3 8.5 14 1.0 26 0.0 31 -6.5 23 -6.5 1 -17.0 1982 -25.0 21 -20.0 19 -13.5 30 -3.5 1 5.5 9 10.0 8 10.0 26 9.0 17 4.5 18 1.0 31 -6.5 16 -24.5 8 -25.0 1983 -28.5 27 -22.0 2 -10.5 8 -11.0 2 3.5 3 8.5 15 10.5 8 8.5 28 4.5 27 -3.5 24 -2.5 4 -19.5 22 -28.5 1984 -25.5 31 -22.5 1 -7.5 16 -3.0 4 -2.5 2 6.5 1 12.5 15 9.5 27 2.5 30 -4.0 23 -6.5 21 -11.5 20 -25.5 1985 -14.5 4 -11.5 6 -14.5 8 -2.5 7 2.5 4 9.5 21 11.5 3 8.5 29 3.5 25 -4.5 30 -3.5 10 -15.5 30 -15.5 1986 -16.5 20 -11.5 9 -11.5 16 -1.0 5 3.0 1 7.5 1 11.5 27 9.5 31 5.5 3 0.0 24 -10.5 18 -14.5 2 -16.5 1987 -12.5 10 -12.0 7 -7.5 15 -3.5 6 4.5 7 10.0 9 8.5 7 7.5 27 4.5 28 -1.0 9 -9.5 30 -16.5 29 -16.5 1988 -19.5 20 -17.0 26 -6.5 16 -6.5 2 5.5 7 7.0 26 10.5 2 11.0 26 5.0 29 2.0 11 -8.0 26 -17.0 28 -19.5 1989 -25.5 31 -25.5 7 -13.0 30 -7.5 2 1.0 2 8.5 17 11.5 9 10.5 31 1.5 13 0.5 26 -5.0 3 -11.5 18 -25.5 1990 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1991 -15.5 16 -21.5 14 -6.0 1 -1.0 6 0.0 3 5.5 2 ***** ** 11.5 28 9.5 30 6.5 23 -7.0 21 -15.0 20 ***** 1992 -25.0 29 -21.0 5 ***** ** 5.0 14 6.5 7 10.0 3 11.0 11 9.5 31 2.5 30 -1.0 27 -9.0 22 -9.0 27 ***** 1993 -16.0 22 ***** ** ***** ** ***** ** 2.0 10 9.0 21 12.0 8 10.0 29 ***** ** ***** ** ***** ** ***** ** ***** 1994 ***** ** ***** ** ***** ** ***** ** ***** ** 9.0 5 13.0 26 4.0 31 3.0 18 1.0 10 1.0 15 -19.0 6 ***** 1995 -10.0 1 -6.0 4 -6.0 9 1.0 4 ***** ** 4.0 11 5.0 3 4.0 23 1.0 12 -1.0 18 ***** ** -10.0 7 ***** 1996 -18.4 12 -10.5 23 -7.2 22 -3.0 17 6.5 2 10.0 10 11.0 17 10.0 26 6.0 23 -6.0 18 -9.0 12 -12.0 1 -18.4 1997 -14.0 22 -20.0 1 -19.0 8 -10.0 12 -5.0 6 6.0 4 10.0 7 11.0 31 3.0 15 0.0 25 -9.0 28 -15.0 28 -20.0 1998 -23.0 10 -22.0 24 -20.0 4 -5.0 6 1.0 5 8.0 1 10.0 8 12.0 3 7.0 7 1.0 24 -2.2 24 -4.0 8 -23.0 1999 -15.0 27 -13.4 19 -9.3 5 -5.0 12 1.0 22 11.0 7 9.2 16 13.0 15 4.0 28 2.0 14 -9.2 30 -11.4 4 -15.0 2000 -18.2 31 -21.2 9 -8.2 1 -2.6 1 5.0 22 5.0 14 12.4 21 8.6 31 6.6 23 -1.0 29 -4.0 23 -18.6 17 -21.2 2001 -28.0 28 -9.0 25 -6.2 13 -1.0 18 1.6 1 5.0 21 9.0 6 10.0 1 5.4 21 2.6 14 -4.0 2 -7.0 7 -28.0 2002 -22.0 14 -10.0 22 -9.0 8 -1.4 1 2.2 14 3.2 17 8.4 1 10.0 4 1.2 25 3.0 31 -5.0 30 -9.2 30 -22.0 2003 -17.0 20 -18.0 18 -19.0 1 -3.0 12 -1.0 1 6.0 6 7.4 2 6.0 1 0.0 20 -4.2 6 -11.0 26 -15.0 13 -19.0 LOW. -30.0 20 -34.5 5 -23.0 2 -16.5 2 -5.0 6 1.5 6 5.0 7 4.0 31 -0.5 21 -10.0 28 -13.0 8 -28.0 26 -34.5 YEAR 1964 1974 1976 1967 1997 1967 1965 1994 1966 1975 1973 1972 1974 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 9 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 5.0 31 8.5 22 16.0 30 19.5 28 26.0 21 30.5 26 36.0 5 35.0 6 32.0 2 31.0 1 16.0 17 8.5 6 36.0 1965 5.0 27 12.5 28 17.0 9 20.0 24 27.5 22 30.0 3 34.5 25 32.5 1 30.0 1 21.0 13 14.5 4 13.0 5 34.5 1966 13.5 4 11.0 25 15.5 10 19.5 21 28.5 23 33.5 13 36.5 11 34.0 3 31.0 1 ***** ** 17.0 29 15.5 10 ***** 1967 11.5 17 5.5 10 13.6 17 17.5 24 24.5 25 33.0 27 36.5 21 34.5 18 31.0 2 24.0 2 19.5 6 12.5 17 36.5 1968 9.0 14 11.3 29 15.0 13 20.5 19 24.0 22 30.5 29 32.5 8 32.5 16 31.0 4 25.0 1 15.5 13 10.5 3 32.5 1969 6.0 18 10.5 28 17.5 30 21.0 25 25.5 14 31.5 29 34.5 25 33.5 4 28.0 6 26.0 5 14.0 7 16.0 13 34.5 1970 8.5 5 11.0 15 19.0 28 23.5 15 28.5 16 ***** ** 34.5 31 34.5 9 32.0 2 27.0 7 19.5 2 14.0 4 ***** 1971 12.5 8 9.5 21 15.0 18 19.5 29 25.0 15 32.5 26 34.0 13 33.0 11 31.5 4 23.5 15 20.5 2 13.5 12 34.0 1972 5.0 12 8.5 17 13.5 30 23.5 10 24.0 26 31.0 19 34.0 22 31.0 1 30.0 3 26.5 1 20.0 1 7.0 10 34.0 1973 7.0 27 14.5 19 17.5 2 21.5 26 26.5 29 35.5 24 35.5 24 35.0 3 31.5 1 26.0 7 17.5 13 12.5 2 35.5 1974 2.5 4 5.5 17 17.5 22 21.0 19 27.0 27 32.5 21 32.5 13 32.5 17 ***** ** 25.0 1 ***** ** 13.0 1 ***** 1975 5.5 1 9.5 22 15.5 27 21.0 20 27.5 21 29.0 18 34.5 30 34.5 13 30.5 1 24.5 1 17.5 3 7.5 1 34.5 1976 8.5 26 8.5 4 13.0 20 20.0 16 24.5 31 32.0 25 34.5 31 34.5 1 31.5 6 23.0 2 18.0 5 16.0 15 34.5 1977 5.0 19 15.5 28 18.5 18 21.5 30 26.5 13 33.0 25 36.5 15 34.0 15 29.5 14 27.0 2 15.0 28 13.0 4 36.5 1978 10.5 1 14.5 16 17.0 29 21.5 10 27.0 26 33.0 30 34.0 23 32.5 10 31.5 2 25.5 1 13.0 1 13.5 25 34.0 1979 12.0 3 14.0 15 14.5 19 23.5 6 25.0 27 32.0 30 34.0 19 31.0 2 31.0 12 25.0 3 19.5 9 11.5 5 34.0 1980 6.5 29 ***** ** ***** ** 22.5 21 27.5 22 31.5 8 33.0 28 33.5 5 31.0 5 25.0 6 16.5 3 18.5 6 ***** 1981 8.5 7 11.0 19 18.5 20 22.5 21 26.5 26 31.0 30 34.0 12 34.0 19 29.5 3 23.5 4 17.5 2 13.5 2 34.0 1982 12.0 28 8.0 28 35.0 29 22.5 26 25.5 17 32.5 9 33.5 18 34.5 4 30.0 1 24.5 7 19.5 20 7.5 28 35.0 1983 10.0 23 7.5 25 15.0 28 19.5 17 26.5 23 34.0 18 36.5 12 36.5 10 33.5 3 26.5 11 20.5 2 15.5 1 36.5 1984 8.5 9 13.5 12 18.5 11 21.5 14 25.5 27 34.5 14 34.5 8 35.0 17 33.0 1 27.5 5 17.5 1 9.5 2 35.0 1985 12.5 27 12.0 13 16.5 22 22.5 19 28.5 30 33.0 29 36.5 29 33.0 1 32.5 3 30.5 8 17.5 1 11.0 11 36.5 1986 11.5 2 12.5 23 15.5 28 19.5 17 25.5 20 34.5 29 36.5 1 32.5 1 29.5 15 27.0 1 15.0 2 7.5 20 36.5 1987 15.0 31 16.0 2 13.5 8 23.5 29 31.0 22 34.0 27 34.5 15 34.5 11 30.5 4 28.0 2 20.0 5 15.0 17 34.5 1988 8.0 6 11.5 1 17.5 27 21.5 8 27.0 28 32.5 13 38.0 24 33.5 9 32.5 11 26.5 5 21.0 4 16.0 11 38.0 1989 6.0 20 5.0 28 13.5 8 21.5 14 29.5 31 35.0 29 37.0 3 33.5 25 33.0 1 27.0 6 17.0 5 10.5 1 37.0 1990 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1991 10.5 7 10.5 26 18.5 31 25.0 26 29.0 31 32.0 16 ***** ** 38.0 3 35.0 1 29.5 30 23.0 2 14.0 1 ***** 1992 7.5 3 6.5 27 ***** ** 23.5 20 28.0 30 32.0 30 35.0 3 34.5 11 30.0 1 25.0 3 17.5 20 11.0 1 ***** 1993 6.0 9 ***** ** ***** ** ***** ** 27.5 29 35.2 13 33.5 9 36.0 11 ***** ** ***** ** ***** ** ***** ** ***** 1994 ***** ** ***** ** ***** ** ***** ** ***** ** 31.0 17 37.0 15 34.0 1 25.0 4 19.0 4 17.5 4 11.0 1 ***** 1995 10.0 8 12.0 2 19.0 14 24.0 29 ***** ** 29.0 29 36.0 14 34.0 6 34.0 3 26.0 9 20.0 2 11.0 31 ***** 1996 10.0 2 11.0 25 16.0 30 20.0 21 28.0 31 31.0 22 33.0 3 32.0 6 31.0 5 27.0 12 18.0 1 17.0 29 33.0 1997 10.0 1 13.0 21 13.0 3 24.0 26 26.0 30 30.0 12 37.0 28 36.0 2 32.0 4 25.0 3 14.0 2 12.0 8 37.0 1998 6.0 4 12.0 7 15.0 23 24.0 14 27.0 28 33.0 28 37.0 12 34.0 17 32.0 2 26.0 5 18.0 7 20.5 10 37.0 1999 11.5 5 13.0 26 17.5 31 21.5 27 30.5 30 31.5 2 35.5 4 35.0 29 32.5 3 27.0 1 15.5 5 15.0 29 35.5 2000 13.5 1 10.5 24 16.0 22 23.0 15 28.0 29 34.5 23 34.5 1 34.6 9 34.0 4 23.0 6 16.5 4 11.5 1 34.6 2001 12.0 7 13.0 28 19.0 31 22.5 5 28.0 16 37.0 29 36.0 10 35.5 22 31.5 3 25.0 1 24.5 3 17.5 30 37.0 2002 10.5 5 11.5 25 19.0 13 23.0 28 26.6 29 31.5 29 35.0 17 35.0 11 32.5 2 27.0 4 18.0 11 10.0 2 35.0 2003 15.0 12 9.2 3 16.0 25 22.2 9 25.0 23 35.0 22 39.0 16 35.0 16 33.0 1 24.0 8 19.0 6 8.0 1 39.0 HIG. 15.0 31 16.0 2 35.0 29 25.0 26 31.0 22 37.0 29 39.0 16 38.0 3 35.0 1 31.0 1 24.5 3 20.5 10 39.0 YEAR 1987 1987 1982 1991 1987 2001 2003 1991 1991 1964 2001 1998 2003 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 10 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 7.0 19 7.2 6 17.0 12 17.0 9 1.0 11 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 14.0 22 15.2 12 17.0 1965 14.6 20 12.0 14 44.2 3 16.0 18 10.4 2 0.0 ** 0.0 ** 0.0 ** 3.0 29 50.0 29 27.0 18 18.0 28 50.0 1966 37.0 30 51.0 2 14.0 18 18.0 19 21.0 6 0.0 ** 0.0 ** 0.0 ** 0.0 ** 38.0 25 0.0 ** 7.5 26 51.0 1967 5.0 22 5.0 12 20.8 8 18.2 5 11.0 18 0.0 ** 0.0 ** 0.0 ** 0.0 ** 6.0 22 17.0 24 1.7 23 20.8 1968 20.0 7 15.7 21 25.0 29 16.2 2 19.5 14 0.0 ** 0.0 ** 0.0 ** 0.0 ** 13.0 31 10.0 16 14.0 27 25.0 1969 42.8 23 11.0 21 19.8 11 12.4 11 18.5 7 0.0 ** 0.0 ** 6.8 28 0.0 ** 12.8 30 12.0 2 17.0 27 42.8 1970 8.0 27 18.2 6 8.0 11 30.0 23 12.2 4 ***** ** 0.0 ** 0.0 ** 0.0 ** 2.8 14 12.0 28 22.0 12 ***** 1971 7.4 29 4.8 13 13.2 15 35.0 13 16.2 7 0.0 ** 0.0 ** 4.2 1 0.0 ** 0.0 ** 14.2 10 33.0 10 35.0 1972 5.0 22 10.0 9 33.0 22 13.2 11 16.0 29 0.0 ** 0.0 ** 0.0 ** 0.0 ** 12.0 30 80.0 5 10.6 22 80.0 1973 5.2 29 11.0 22 44.0 3 20.0 8 4.8 10 0.0 ** 3.8 21 0.0 ** 0.0 ** 0.0 ** 17.0 23 6.4 31 44.0 1974 11.2 7 18.2 26 11.0 31 24.0 10 8.0 4 0.0 ** 3.0 8 0.0 ** ***** ** 5.0 11 ***** ** 31.0 5 ***** 1975 15.0 4 9.0 24 8.0 19 12.0 26 40.0 12 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 13.0 11 50.0 23 50.0 1976 15.0 19 41.0 10 15.0 21 35.0 5 24.0 14 15.0 6 3.0 26 0.0 ** 0.0 ** 13.0 29 13.0 12 12.0 10 41.0 1977 6.0 3 12.2 7 18.0 4 41.0 24 20.0 23 2.0 1 0.0 ** 0.0 ** 0.0 ** 39.0 19 19.0 12 30.0 14 41.0 1978 20.0 4 18.0 24 20.0 13 15.0 25 2.2 1 0.0 ** 0.0 ** 0.0 ** 0.0 ** 14.0 31 5.0 10 30.0 10 30.0 1979 13.0 22 12.0 9 30.0 27 10.0 22 27.0 8 0.0 ** 0.0 ** 0.0 ** 0.0 ** 8.0 27 7.0 28 12.0 8 30.0 1980 9.0 23 ***** ** ***** ** 15.0 3 10.0 5 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 14.0 9 6.0 11 ***** 1981 38.0 11 21.0 9 34.0 27 22.0 2 30.0 16 4.0 23 0.0 ** 0.0 ** 0.0 ** 13.0 13 14.0 21 7.0 26 38.0 1982 15.0 29 10.0 24 21.0 25 20.0 8 23.0 14 0.0 ** 0.0 ** 0.0 ** 0.0 ** 30.0 9 43.0 10 14.4 30 43.0 1983 11.8 15 10.2 17 18.2 31 10.6 14 10.0 6 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 28.0 14 19.0 11 28.0 1984 12.2 17 4.0 23 21.0 25 34.0 23 6.2 9 0.0 ** 0.0 ** 0.0 ** 0.0 ** 15.2 19 25.4 11 12.4 3 34.0 1985 15.2 31 12.4 25 25.0 19 7.6 5 10.2 17 4.2 11 0.0 ** 0.0 ** 0.0 ** 0.0 ** 10.2 10 60.2 18 60.2 1986 5.0 30 5.4 1 32.6 6 23.2 29 45.4 4 0.0 ** 0.0 ** 0.0 ** 0.0 ** 11.2 21 25.0 25 25.2 17 45.4 1987 5.0 7 6.4 28 29.6 1 19.4 19 8.0 5 0.0 ** 7.0 25 0.0 ** 0.0 ** 22.4 22 7.6 7 22.0 23 29.6 1988 8.6 8 47.0 23 33.2 2 15.0 20 6.8 2 0.0 ** 0.0 ** 0.0 ** 1.2 3 8.0 17 21.2 13 13.5 26 47.0 1989 17.0 29 7.4 23 21.0 28 5.0 30 4.4 8 0.0 ** 0.0 ** 0.0 ** 0.0 ** 4.0 22 25.4 14 43.8 3 43.8 1990 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** ***** 1991 12.0 14 12.0 1 26.0 3 3.0 28 0.0 ** 0.0 ** ***** ** 0.0 ** 0.0 ** 4.0 18 0.0 ** 21.0 9 ***** 1992 5.0 3 25.0 25 ***** ** 49.0 27 37.0 6 10.0 6 0.0 ** 7.0 28 0.0 ** 0.0 ** 15.0 24 7.0 3 ***** 1993 14.0 5 ***** ** ***** ** ***** ** 37.0 7 0.0 ** 0.0 ** 0.0 ** ***** ** ***** ** ***** ** ***** ** ***** 1994 ***** ** ***** ** ***** ** ***** ** ***** ** 0.0 ** 0.0 ** 0.0 ** 9.0 25 43.0 16 45.0 7 10.0 4 ***** 1995 14.0 6 11.0 5 10.0 2 13.0 4 ***** ** 18.0 8 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** ***** 1996 30.5 6 29.0 21 28.0 22 21.7 15 7.0 11 0.0 ** 0.0 ** 0.0 ** 0.0 ** 20.0 15 13.0 28 14.0 22 30.5 1997 20.0 22 3.0 19 24.5 13 35.0 10 10.5 11 0.0 ** 0.0 ** 0.0 ** 0.0 ** 1.0 20 19.0 5 10.0 5 35.0 1998 12.9 6 38.0 10 46.7 29 9.0 20 7.2 4 0.0 ** 0.0 ** 7.0 6 0.0 ** 22.9 11 3.0 12 2.0 27 46.7 1999 10.2 9 18.5 22 12.6 21 10.9 2 5.0 5 0.0 ** 5.0 28 0.0 ** 0.0 ** 0.0 ** 57.9 8 14.0 11 57.9 2000 24.5 28 15.0 25 17.0 25 6.5 21 0.0 ** 0.0 ** 0.0 ** 0.0 ** 0.0 ** 13.5 15 17.2 6 30.7 1 30.7 2001 0.0 ** 10.0 14 18.7 10 3.0 9 25.0 4 9.0 12 0.0 ** 0.0 ** 3.5 22 3.5 28 31.0 19 32.5 1 32.5 2002 13.2 12 10.0 13 22.0 28 16.2 20 9.0 5 1.0 10 0.0 ** 0.0 ** 0.0 ** 5.0 31 5.5 24 19.0 9 22.0 2003 10.2 16 11.3 25 25.0 26 40.5 22 20.0 20 0.0 ** 0.0 ** 0.0 ** 0.0 ** 15.0 30 8.0 13 15.0 6 40.5 HIG. 42.8 23 51.0 2 46.7 29 49.0 27 45.4 4 18.0 8 7.0 25 7.0 28 9.0 25 50.0 29 80.0 5 60.2 18 80.0 YEAR 1969 1966 1998 1992 1986 1995 1987 1992 1994 1965 1972 1985 1972 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 11 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. MONTHLY TOTAL PRECIPITATION WITH SEASONAL PERCENT. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL SEASONAL-PERCENT ----------------------- 1964 7.0 24.1 59.0 39.0 1.0 0.0 0.0 0.0 0.0 0.0 36.0 32.4 198.5 45.4 20.2 0.0 34.5 1965 43.4 12.0 91.2 30.0 10.4 0.0 0.0 0.0 3.0 135.8 85.0 44.4 455.2 32.2 8.9 0.7 58.3 1966 98.0 126.0 61.2 43.2 63.0 0.0 0.0 0.0 0.0 101.0 0.0 14.5 506.9 56.3 21.0 0.0 22.8 1967 18.9 34.2 53.8 42.3 16.5 0.0 0.0 0.0 0.0 9.7 41.1 4.1 220.6 48.5 26.7 0.0 24.9 1968 33.8 33.8 60.8 81.3 73.5 0.0 0.0 0.0 0.0 22.5 38.2 25.5 369.4 34.8 41.9 0.0 23.3 1969 170.7 26.6 77.6 56.0 41.5 0.0 0.0 6.8 0.0 31.0 17.0 50.4 477.6 57.6 20.4 1.4 20.6 1970 28.0 28.0 20.6 77.0 15.4 ****** 0.0 0.0 0.0 2.8 12.0 43.2 ****** 33.7 40.7 0.0 25.6 1971 15.2 16.2 51.6 116.6 26.2 0.0 0.0 8.0 0.0 0.0 50.0 55.4 339.2 24.5 42.1 2.4 31.1 1972 16.6 17.0 115.0 43.2 67.6 0.0 0.0 0.0 0.0 12.0 95.0 36.2 402.6 36.9 27.5 0.0 35.6 1973 25.4 22.0 67.2 41.4 4.8 0.0 6.2 0.0 0.0 0.0 20.0 16.8 203.8 56.2 22.7 3.0 18.1 1974 44.8 52.8 28.4 54.2 11.0 0.0 3.0 0.0 ****** 5.0 ****** 49.2 ****** 50.7 26.2 1.2 21.8 1975 50.0 26.0 18.0 50.0 59.0 0.0 0.0 0.0 0.0 0.0 23.0 106.0 332.0 28.3 32.8 0.0 38.9 1976 51.0 95.2 54.0 131.0 49.0 15.0 3.0 0.0 0.0 27.0 25.0 40.0 490.2 40.8 39.8 0.6 18.8 1977 36.4 15.2 41.4 115.2 80.0 2.0 0.0 0.0 0.0 125.0 59.0 74.8 549.0 16.9 35.9 0.0 47.1 1978 49.0 65.0 60.8 15.0 4.2 0.0 0.0 0.0 0.0 17.0 13.8 150.0 374.8 46.6 5.1 0.0 48.2 1979 41.0 39.0 81.0 16.0 97.0 0.0 0.0 0.0 0.0 17.0 9.0 52.8 352.8 45.6 32.0 0.0 22.3 1980 36.6 ****** ****** 50.0 14.0 0.0 0.0 0.0 0.0 0.0 55.0 12.0 ****** 21.8 38.2 0.0 40.0 1981 91.0 78.8 60.4 76.0 40.0 4.0 0.0 0.0 0.0 29.0 35.0 7.0 421.2 54.7 28.5 0.0 16.9 1982 32.8 39.6 120.0 25.0 76.0 0.0 0.0 0.0 0.0 110.0 72.8 33.0 509.2 37.8 19.8 0.0 42.4 1983 44.8 16.6 42.6 42.4 23.0 0.0 0.0 0.0 0.0 0.0 68.0 83.0 320.4 32.5 20.4 0.0 47.1 1984 31.0 5.8 77.0 59.6 6.2 0.0 0.0 0.0 0.0 15.2 62.8 45.4 303.0 37.6 21.7 0.0 40.7 1985 41.2 44.6 71.4 18.0 18.8 6.4 0.0 0.0 0.0 0.0 19.4 79.4 299.2 52.5 14.4 0.0 33.0 1986 13.6 22.9 84.0 107.2 96.0 0.0 0.0 0.0 0.0 18.2 84.0 35.6 461.5 26.1 44.0 0.0 29.9 1987 6.0 24.2 133.8 30.2 21.8 0.0 21.4 0.0 0.0 99.2 16.6 75.8 429.0 38.2 12.1 5.0 44.7 1988 51.6 146.1 100.6 65.8 7.8 0.0 0.0 0.0 1.2 14.0 61.6 30.3 479.0 62.3 15.4 0.3 22.1 1989 95.0 35.3 86.6 12.0 11.4 0.0 0.0 0.0 0.0 7.2 55.0 86.6 389.1 55.7 6.0 0.0 38.2 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ***** ***** ***** ***** 1991 35.0 31.0 86.6 3.0 0.0 0.0 ****** 0.0 0.0 6.8 0.0 64.0 ****** 67.4 1.3 0.0 31.3 1992 19.0 60.5 ****** 113.0 137.0 10.0 0.0 7.0 0.0 0.0 43.0 32.0 ****** 18.9 61.7 1.7 17.8 1993 42.0 ****** ****** ****** 57.5 0.0 0.0 0.0 ****** ****** ****** ****** ****** 42.2 57.8 0.0 ***** 1994 ****** ****** ****** ****** ****** 0.0 0.0 0.0 40.0 182.5 184.1 13.0 ****** ***** 0.0 9.5 90.5 1995 18.0 34.0 31.0 79.0 ****** 70.5 0.0 0.0 0.0 0.0 0.0 0.0 ****** 35.7 64.3 0.0 0.0 1996 88.2 78.0 116.0 68.4 18.0 0.0 0.0 0.0 0.0 20.0 29.0 28.0 445.6 63.3 19.4 0.0 17.3 1997 21.0 6.0 79.8 129.5 50.5 0.0 0.0 0.0 0.0 1.0 52.0 25.0 364.8 29.3 49.3 0.0 21.4 1998 32.5 51.0 128.5 27.0 23.7 0.0 0.0 16.0 0.0 43.4 3.0 4.0 329.1 64.4 15.4 4.9 15.3 1999 28.1 40.0 33.3 25.9 5.0 0.0 8.0 0.0 0.0 0.0 62.9 33.4 236.6 42.9 13.1 3.4 40.7 2000 34.5 23.5 32.0 6.5 0.0 0.0 0.0 0.0 0.0 15.2 36.7 42.2 190.6 47.2 3.4 0.0 49.4 2001 0.0 23.5 45.4 3.0 35.0 9.0 0.0 0.0 6.3 6.0 39.5 116.6 284.3 24.2 16.5 2.2 57.0 2002 25.7 19.6 55.8 30.5 19.3 1.0 0.0 0.0 0.0 5.0 25.3 40.0 222.2 45.5 22.9 0.0 31.6 2003 29.5 23.8 65.2 111.8 23.0 0.0 0.0 0.0 0.0 20.0 11.0 45.1 329.4 36.0 40.9 0.0 23.1 MEAN 40.7 39.9 68.3 55.0 35.2 3.1 1.1 1.0 1.4 28.9 41.6 45.5 361.7 41.2 25.8 0.9 32.1 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 12 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. NO. OF DAYS WITH PRECIPITATION YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 1 5 6 3 1 0 0 0 0 0 5 4 25 1965 7 1 3 3 1 0 0 0 1 5 4 5 30 1966 5 7 6 4 5 0 0 0 0 7 0 3 37 1967 7 13 7 6 4 0 0 0 0 3 4 3 47 1968 7 9 6 11 9 0 0 0 0 2 7 5 56 1969 12 5 9 10 4 0 0 1 0 4 2 7 54 1970 7 5 5 4 2 *** 0 0 0 1 1 3 *** 1971 4 6 8 9 4 0 0 2 0 0 6 6 45 1972 5 3 12 9 11 0 0 0 0 1 2 9 52 1973 8 3 5 4 1 0 2 0 0 0 2 7 32 1974 13 6 6 8 2 0 1 0 *** 1 *** 9 *** 1975 10 7 3 8 4 0 0 0 0 0 4 12 48 1976 6 11 8 9 5 1 1 0 0 4 3 8 56 1977 9 2 6 8 9 1 0 0 0 6 5 7 53 1978 6 6 7 1 2 0 0 0 0 2 5 8 37 1979 5 5 9 2 7 0 0 0 0 3 2 8 41 1980 9 *** *** 8 2 0 0 0 0 0 8 2 *** 1981 6 11 6 8 3 1 0 0 0 5 4 1 45 1982 5 9 11 2 6 0 0 0 0 9 7 6 55 1983 8 5 4 7 3 0 0 0 0 0 3 8 38 1984 4 2 7 2 1 0 0 0 0 1 8 6 31 1985 5 8 7 5 3 2 0 0 0 0 3 8 41 1986 4 8 8 13 4 0 0 0 0 3 7 5 52 1987 2 7 13 5 6 0 5 0 0 11 4 11 64 1988 9 8 6 9 2 0 0 0 1 3 5 4 47 1989 11 7 13 5 5 0 0 0 0 2 5 4 52 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 6 7 11 1 0 0 *** 0 0 3 0 9 *** 1992 6 6 *** 8 10 1 0 1 0 0 4 6 *** 1993 5 *** *** *** 4 0 0 0 *** *** *** *** *** 1994 *** *** *** *** *** 0 0 0 7 10 10 2 *** 1995 3 5 7 10 *** 10 0 0 0 0 0 0 *** 1996 9 6 8 8 7 0 0 0 0 1 6 4 49 1997 3 2 7 8 8 0 0 0 0 1 9 3 41 1998 7 3 8 6 7 0 0 3 0 3 1 2 40 1999 7 6 5 4 1 0 3 0 0 0 3 3 32 2000 3 3 2 1 0 0 0 0 0 2 5 4 20 2001 0 3 3 1 3 1 0 0 2 2 4 7 26 2002 3 2 6 5 3 1 0 0 0 1 8 7 36 2003 5 4 6 11 2 0 0 0 0 2 2 6 38 MEAN 6 6 7 6 4 0 0 0 0 3 4 6 42 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 13 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 5 6 3 1 0 0 0 0 0 5 4 25 1965 7 1 3 3 1 0 0 0 1 5 4 5 30 1966 5 7 6 4 5 0 0 0 0 7 0 3 37 1967 7 12 6 5 4 0 0 0 0 3 4 3 44 1968 5 6 5 11 9 0 0 0 0 2 7 5 50 1969 12 5 9 10 4 0 0 1 0 4 2 7 54 1970 6 4 5 4 2 *** 0 0 0 1 1 3 *** 1971 4 6 8 9 4 0 0 2 0 0 6 6 45 1972 5 3 12 9 11 0 0 0 0 1 2 9 52 1973 8 3 5 4 1 0 2 0 0 0 2 6 31 1974 11 6 6 8 2 0 1 0 *** 1 *** 9 *** 1975 10 7 3 8 4 0 0 0 0 0 4 12 48 1976 6 11 8 9 5 1 1 0 0 4 3 8 56 1977 9 2 6 8 9 1 0 0 0 6 5 7 53 1978 6 6 7 1 2 0 0 0 0 2 5 8 37 1979 5 5 9 2 7 0 0 0 0 3 2 8 41 1980 9 *** *** 8 2 0 0 0 0 0 8 2 *** 1981 6 11 6 8 3 1 0 0 0 5 4 1 45 1982 4 9 11 2 6 0 0 0 0 9 7 6 54 1983 8 5 4 7 3 0 0 0 0 0 3 8 38 1984 4 2 7 2 1 0 0 0 0 1 8 6 31 1985 5 8 7 5 3 2 0 0 0 0 3 8 41 1986 4 8 8 13 4 0 0 0 0 3 7 5 52 1987 2 7 13 5 6 0 5 0 0 11 4 11 64 1988 9 8 6 9 2 0 0 0 1 3 5 4 47 1989 11 7 13 5 5 0 0 0 0 2 5 4 52 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 6 7 11 1 0 0 *** 0 0 2 0 9 *** 1992 6 6 *** 8 10 1 0 1 0 0 4 6 *** 1993 5 *** *** *** 4 0 0 0 *** *** *** *** *** 1994 *** *** *** *** *** 0 0 0 7 10 10 2 *** 1995 3 5 6 10 *** 10 0 0 0 0 0 0 *** 1996 9 6 8 8 7 0 0 0 0 1 6 4 49 1997 1 2 7 8 8 0 0 0 0 1 7 3 37 1998 6 3 8 6 6 0 0 3 0 3 1 2 38 1999 7 6 5 4 1 0 3 0 0 0 3 3 32 2000 3 3 2 1 0 0 0 0 0 2 5 4 20 2001 0 3 3 1 3 1 0 0 2 2 4 7 26 2002 3 2 6 5 3 1 0 0 0 1 8 7 36 2003 5 4 6 11 2 0 0 0 0 2 2 6 38 MEAN 6 6 7 6 4 0 0 0 0 3 4 6 42 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 14 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 0 4 2 0 0 0 0 0 0 2 2 10 1965 2 1 3 1 1 0 0 0 0 5 4 1 18 1966 3 4 3 2 4 0 0 0 0 4 0 0 20 1967 0 0 2 2 1 0 0 0 0 0 2 0 7 1968 1 1 2 3 2 0 0 0 0 1 1 1 12 1969 7 1 3 3 2 0 0 0 0 1 1 1 19 1970 0 1 0 3 1 *** 0 0 0 0 1 2 *** 1971 0 0 1 4 1 0 0 0 0 0 2 1 9 1972 0 1 4 1 3 0 0 0 0 1 2 1 13 1973 0 1 2 2 0 0 0 0 0 0 1 0 6 1974 1 2 1 1 0 0 0 0 *** 0 *** 1 *** 1975 1 0 0 2 2 0 0 0 0 0 1 2 8 1976 3 4 1 6 2 1 0 0 0 1 1 1 20 1977 0 1 1 4 3 0 0 0 0 4 3 4 20 1978 2 3 3 1 0 0 0 0 0 1 0 8 18 1979 2 2 3 1 3 0 0 0 0 0 0 2 13 1980 0 *** *** 1 1 0 0 0 0 0 2 0 *** 1981 3 3 2 4 1 0 0 0 0 1 2 0 16 1982 1 1 6 1 4 0 0 0 0 5 1 1 20 1983 1 1 2 1 1 0 0 0 0 0 3 4 13 1984 1 0 3 2 0 0 0 0 0 1 2 2 11 1985 1 2 2 0 1 0 0 0 0 0 1 1 8 1986 0 0 4 5 2 0 0 0 0 1 3 1 16 1987 0 0 4 1 0 0 0 0 0 3 0 2 10 1988 0 4 4 2 0 0 0 0 0 0 3 1 14 1989 3 0 4 0 0 0 0 0 0 0 2 2 11 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 1 1 3 0 0 0 *** 0 0 0 0 1 *** 1992 0 2 *** 3 5 1 0 0 0 0 3 0 *** 1993 3 *** *** *** 2 0 0 0 *** *** *** *** *** 1994 *** *** *** *** *** 0 0 0 0 6 5 1 *** 1995 1 3 1 5 *** 3 0 0 0 0 0 0 *** 1996 2 3 5 4 0 0 0 0 0 1 1 1 17 1997 1 0 3 6 1 0 0 0 0 0 2 2 15 1998 1 1 5 0 0 0 0 0 0 2 0 0 9 1999 1 1 2 1 0 0 0 0 0 0 1 2 8 2000 1 1 2 0 0 0 0 0 0 1 1 1 7 2001 0 1 3 0 1 0 0 0 0 0 1 4 10 2002 1 1 3 1 0 0 0 0 0 0 0 1 7 2003 1 1 3 4 1 0 0 0 0 1 0 3 14 MEAN 1 1 3 2 1 0 0 0 0 1 1 2 12 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 15 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 03 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 38 65 66 59 34 31 25 31 41 32 64 50 45 1965 46 53 62 59 35 25 26 32 34 47 52 47 43 1966 63 64 59 47 38 40 44 50 47 42 55 47 50 1967 50 45 65 51 51 38 24 27 42 55 52 32 44 1968 33 *** 46 67 57 40 29 30 38 55 70 63 *** 1969 52 60 60 66 51 33 37 36 47 50 68 62 52 1970 66 62 73 52 42 *** 31 28 32 37 49 50 *** 1971 66 63 62 66 48 36 33 39 42 42 55 51 50 1972 49 48 73 69 66 44 36 50 55 59 65 47 55 1973 *** 61 63 60 52 43 36 66 57 59 47 52 *** 1974 *** *** 68 60 46 47 56 55 *** 65 *** 39 *** 1975 28 58 55 60 59 60 61 61 50 36 55 49 53 1976 60 59 59 70 63 52 60 46 55 66 70 69 61 1977 56 66 65 69 64 56 48 54 54 68 73 70 62 1978 60 58 64 50 57 52 51 50 55 61 63 56 56 1979 63 63 66 62 67 62 53 53 55 66 65 61 61 1980 59 *** *** 64 61 57 56 51 56 53 71 57 *** 1981 61 62 63 63 60 59 56 53 54 68 62 55 60 1982 43 37 52 65 66 58 49 56 52 66 62 51 55 1983 44 45 42 65 67 59 62 60 62 60 58 48 56 1984 47 39 53 59 64 61 53 53 53 51 66 55 55 1985 59 52 65 62 57 51 46 46 35 45 53 53 52 1986 64 50 59 68 51 43 38 42 35 49 56 44 50 1987 53 57 65 58 52 40 47 39 44 68 52 46 52 1988 42 36 58 64 44 37 37 39 36 44 56 55 46 1989 49 69 64 59 50 32 30 33 38 46 70 50 49 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 72 75 67 52 45 40 *** 28 41 60 57 69 *** 1992 76 66 *** 63 69 55 39 44 42 54 75 83 *** 1993 *** *** *** *** 59 43 36 77 *** *** *** *** *** 1994 *** *** *** *** *** 47 55 46 69 78 75 71 *** 1995 76 73 60 71 *** 67 37 34 46 60 62 79 *** 1996 76 80 87 74 61 46 39 38 38 59 68 72 62 1997 77 59 80 68 54 41 34 28 38 49 83 81 58 1998 81 65 67 58 58 33 37 39 38 52 54 54 53 1999 72 74 72 61 38 29 37 29 37 48 64 74 53 2000 70 64 74 51 36 27 27 26 34 59 75 75 52 2001 64 79 66 43 40 44 35 30 43 48 57 68 51 2002 59 69 67 58 40 28 33 31 27 44 71 75 50 2003 64 71 71 61 61 46 45 46 48 57 67 59 58 MEAN 58 60 64 61 53 45 42 43 45 54 63 58 54 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 16 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 09 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 44 60 44 36 22 19 14 15 29 21 37 48 32 1965 62 58 44 35 24 17 15 16 23 35 44 50 35 1966 54 55 48 35 26 25 27 19 22 32 31 47 35 1967 47 54 57 39 29 20 14 15 24 31 39 39 34 1968 35 42 41 42 30 21 18 18 22 34 47 56 34 1969 51 50 52 41 33 21 20 22 30 32 42 46 37 1970 63 52 45 31 21 *** 18 15 18 20 32 53 *** 1971 54 60 45 45 32 21 23 22 24 23 50 46 37 1972 62 62 68 44 39 35 25 37 41 39 46 69 47 1973 60 59 48 36 39 35 34 65 59 42 47 59 49 1974 34 45 63 58 52 36 40 57 *** 43 *** 62 *** 1975 26 41 58 40 47 59 49 56 47 32 54 55 47 1976 67 68 58 58 50 35 47 35 40 52 57 62 52 1977 70 58 48 55 50 40 39 41 38 53 57 61 51 1978 55 58 54 42 44 40 41 38 38 40 51 56 46 1979 65 62 62 49 59 46 39 40 40 47 44 65 52 1980 64 *** *** 51 48 44 42 43 37 37 61 58 *** 1981 63 63 58 56 52 51 52 46 40 55 51 55 54 1982 51 57 61 56 60 54 42 43 40 47 57 51 52 1983 60 59 62 62 63 57 61 62 61 57 55 52 59 1984 56 54 59 61 63 61 53 46 47 41 56 61 55 1985 62 67 54 57 56 54 51 45 49 30 60 64 54 1986 59 60 59 54 44 28 25 24 19 31 49 63 43 1987 53 52 63 45 43 26 29 22 25 49 35 48 41 1988 55 53 51 42 31 18 20 23 19 25 35 46 35 1989 52 47 57 34 29 15 17 14 21 23 42 56 34 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 59 58 52 33 23 19 *** 16 28 31 32 47 *** 1992 68 68 *** 54 42 36 27 18 18 20 52 76 *** 1993 84 *** *** *** 36 24 27 70 *** *** *** *** *** 1994 *** *** *** *** *** 23 37 30 45 64 69 77 *** 1995 61 55 47 50 *** 49 22 25 33 45 59 70 *** 1996 77 69 74 47 36 30 27 23 17 28 53 52 44 1997 64 74 60 44 31 23 17 15 20 29 53 58 41 1998 75 72 55 36 30 17 16 21 20 27 26 31 36 1999 59 44 45 41 21 14 20 17 17 22 41 40 32 2000 66 63 36 29 20 15 14 15 15 27 46 58 34 2001 45 57 35 23 24 27 16 15 19 24 36 57 32 2002 67 50 30 35 24 16 18 13 16 21 40 55 32 2003 52 58 42 41 38 26 26 27 23 28 40 61 39 MEAN 58 57 52 44 38 32 30 30 30 35 47 56 42 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 17 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 15 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 49 61 46 37 25 16 14 16 27 23 38 53 34 1965 55 58 47 37 25 15 16 17 24 38 49 49 36 1966 59 64 49 37 28 24 27 19 24 65 37 48 40 1967 47 44 46 45 35 25 18 17 27 43 49 34 36 1968 37 36 38 52 44 24 22 17 22 37 54 63 37 1969 53 63 55 49 35 25 20 24 30 37 48 54 41 1970 59 49 54 35 25 *** 17 14 16 21 38 57 *** 1971 59 62 57 53 34 22 22 22 25 27 56 55 41 1972 56 56 65 52 46 32 22 36 42 41 55 58 47 1973 48 61 55 48 39 32 32 68 52 38 51 63 49 1974 *** *** 56 52 47 33 44 54 *** 52 *** 50 *** 1975 37 43 57 56 55 63 45 55 44 41 56 55 51 1976 70 71 61 58 47 37 51 37 43 57 64 76 56 1977 67 71 53 61 55 39 39 39 43 59 65 73 55 1978 63 63 61 46 45 41 41 38 40 44 61 64 51 1979 69 65 68 52 60 49 39 41 41 52 55 72 55 1980 56 *** *** 54 53 45 41 41 40 43 69 63 *** 1981 71 68 64 57 53 50 50 47 42 58 56 65 57 1982 55 46 64 59 63 56 40 42 40 52 66 47 53 1983 55 52 61 68 64 60 64 65 65 60 59 52 60 1984 45 49 62 62 64 61 51 44 50 44 63 65 55 1985 64 63 58 58 56 54 47 46 57 32 58 64 55 1986 63 63 61 61 45 29 23 23 25 33 56 59 45 1987 60 60 67 46 41 26 31 22 26 51 40 57 44 1988 51 54 53 46 29 19 20 23 20 27 48 49 37 1989 55 48 66 42 33 16 16 15 19 31 52 64 38 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 61 56 54 36 26 23 *** 28 36 54 64 45 *** 1992 60 68 *** 63 54 38 22 27 18 21 52 73 *** 1993 86 *** *** *** 55 36 34 74 *** *** *** *** *** 1994 *** *** *** *** *** 21 35 24 41 63 67 69 *** 1995 70 63 51 55 *** 45 22 25 28 44 55 66 *** 1996 73 71 78 47 37 31 26 22 17 28 63 60 46 1997 69 76 69 47 36 23 18 16 19 31 61 68 44 1998 75 68 63 42 33 21 20 24 21 32 28 37 39 1999 67 50 51 40 19 13 21 17 16 23 45 55 35 2000 70 69 36 32 18 13 14 14 17 30 49 69 36 2001 54 67 39 27 22 29 15 13 20 25 41 59 34 2002 64 54 39 41 23 14 17 13 14 20 44 62 34 2003 54 66 52 45 36 25 25 24 23 28 52 66 41 MEAN 60 59 56 49 41 32 30 31 31 40 53 59 45 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 18 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 31 24 5 2 0 0 0 0 0 0 24 31 117 1965 31 23 17 6 0 0 0 0 0 0 10 31 118 1966 28 28 20 3 0 0 0 0 0 0 8 16 103 1967 27 27 20 2 0 0 0 0 0 0 2 20 98 1968 23 23 11 0 0 0 0 0 0 0 0 9 66 1969 30 20 0 1 0 0 0 0 0 0 12 12 75 1970 21 12 9 0 0 *** 0 0 0 0 0 24 *** 1971 27 18 9 0 0 0 0 0 0 0 5 18 77 1972 31 29 12 0 0 0 0 0 0 0 3 28 103 1973 31 24 19 2 0 0 0 0 0 0 10 21 107 1974 31 28 13 0 0 0 0 0 *** 0 *** 30 *** 1975 31 28 31 8 0 0 0 0 0 9 11 31 149 1976 20 23 24 0 0 0 0 0 0 0 8 13 88 1977 29 17 0 0 0 0 0 0 0 1 5 6 58 1978 12 9 6 0 0 0 0 0 0 0 12 2 41 1979 11 6 14 1 0 0 0 0 0 0 7 17 56 1980 21 *** *** 0 0 0 0 0 0 2 1 13 *** 1981 16 13 5 2 0 0 0 0 0 0 4 6 46 1982 21 27 9 0 0 0 0 0 0 0 10 27 94 1983 23 20 19 2 0 0 0 0 0 0 0 17 81 1984 23 20 4 0 0 0 0 0 0 1 1 23 72 1985 13 17 11 0 0 0 0 0 0 1 0 18 60 1986 13 18 9 0 0 0 0 0 0 0 15 22 77 1987 14 7 8 0 0 0 0 0 0 0 5 13 47 1988 23 25 4 2 0 0 0 0 0 0 7 8 69 1989 31 22 9 1 0 0 0 0 0 0 3 16 82 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 21 22 5 0 0 0 *** 0 0 0 7 31 *** 1992 31 26 *** 0 0 0 0 0 0 0 6 15 *** 1993 26 *** *** *** 0 0 0 0 *** *** *** *** *** 1994 *** *** *** *** *** 0 0 0 0 0 0 10 *** 1995 18 8 2 0 *** 0 0 0 0 0 *** 16 *** 1996 19 14 7 0 0 0 0 0 0 2 4 18 64 1997 25 27 21 6 1 0 0 0 0 0 10 23 113 1998 25 21 19 2 0 0 0 0 0 0 0 1 68 1999 18 17 15 1 0 0 0 0 0 0 6 17 74 2000 26 26 11 0 0 0 0 0 0 0 1 19 83 2001 22 12 3 0 0 0 0 0 0 0 2 2 41 2002 24 10 12 0 0 0 0 0 0 0 4 14 64 2003 23 21 14 0 0 0 0 0 0 1 16 26 101 MEAN 23 20 11 1 0 0 0 0 0 0 6 17 78 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 19 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 0 0 0 0 0 0 0 0 0 0 0 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 1966 0 0 0 0 0 0 0 0 0 0 0 0 0 1967 0 0 0 0 0 0 0 0 0 0 0 0 0 1968 0 0 0 0 0 0 0 0 0 0 0 0 0 1969 0 0 0 0 0 0 0 0 0 0 0 0 0 1970 0 0 0 0 0 *** 0 0 0 0 0 0 *** 1971 0 0 0 0 0 0 4 0 0 0 0 0 4 1972 0 0 0 0 0 0 0 0 0 0 0 0 0 1973 0 0 0 0 0 0 0 1 0 0 0 0 1 1974 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 1 1 0 0 0 0 2 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 *** 1981 0 0 0 0 0 0 2 0 0 0 0 0 2 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 0 0 0 0 0 0 0 1 0 0 0 0 1 1984 0 0 0 0 0 0 0 0 0 0 0 0 0 1985 0 0 0 0 0 0 0 0 0 0 0 0 0 1986 0 0 0 0 0 0 0 0 0 0 0 0 0 1987 0 0 0 0 0 0 0 0 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 0 0 *** 1992 0 0 *** 0 0 0 0 0 0 0 0 0 *** 1993 0 *** *** *** 0 0 0 4 *** *** *** *** *** 1994 *** *** *** *** *** 0 0 0 0 0 0 0 *** 1995 0 0 0 0 *** 0 0 0 0 0 *** 0 *** 1996 0 0 0 0 0 1 2 0 0 0 0 0 3 1997 0 0 0 0 0 1 2 0 0 0 0 0 3 1998 0 0 0 0 0 0 3 0 0 0 0 0 3 1999 0 0 0 0 0 5 2 1 0 0 0 0 8 2000 0 0 0 0 0 0 3 0 0 0 0 0 3 2001 0 0 0 0 0 0 0 0 0 0 0 0 0 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 2003 0 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 0 0 0 0 0 0 1 0 0 0 0 0 1 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 20 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 30 1 0 0 0 0 0 0 0 0 1 15 47 1965 18 6 0 0 0 0 0 0 0 0 0 0 24 1966 0 0 0 0 0 0 0 0 0 *** 0 0 *** 1967 2 7 1 1 0 0 0 0 0 0 0 2 13 1968 6 8 1 0 0 0 0 0 0 0 0 0 15 1969 6 8 0 0 0 0 0 0 0 0 0 0 14 1970 3 0 0 0 0 *** 0 0 0 0 0 4 *** 1971 2 3 0 0 0 0 0 0 0 0 0 1 6 1972 9 17 0 0 0 0 0 0 0 0 0 10 36 1973 9 0 0 0 0 0 0 0 0 0 0 2 11 1974 24 13 1 0 0 0 0 0 *** 0 *** 0 *** 1975 4 0 0 0 0 0 0 0 0 0 0 4 8 1976 2 7 4 0 0 0 0 0 0 0 0 2 15 1977 10 1 0 0 0 0 0 0 0 0 0 0 11 1978 3 0 0 0 0 0 0 0 0 0 0 0 3 1979 4 0 2 0 0 0 0 0 0 0 0 6 12 1980 7 *** *** 0 0 0 0 0 0 0 0 1 *** 1981 2 1 0 0 0 0 0 0 0 0 0 0 3 1982 4 10 0 0 0 0 0 0 0 0 0 12 26 1983 8 3 0 0 0 0 0 0 0 0 0 7 18 1984 5 2 0 0 0 0 0 0 0 0 0 5 12 1985 0 5 3 0 0 0 0 0 0 0 0 2 10 1986 3 1 2 0 0 0 0 0 0 0 1 3 10 1987 1 0 0 0 0 0 0 0 0 0 0 4 5 1988 10 6 0 0 0 0 0 0 0 0 0 2 18 1989 22 15 1 0 0 0 0 0 0 0 0 0 38 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 4 8 0 0 0 0 *** 0 0 0 0 0 *** 1992 13 11 *** 0 0 0 0 0 0 0 0 2 *** 1993 15 *** *** *** 0 0 0 0 *** *** *** *** *** 1994 *** *** *** *** *** 0 0 0 0 0 0 3 *** 1995 0 0 0 0 *** 0 0 0 0 0 0 0 *** 1996 3 0 0 0 0 0 0 0 0 0 0 0 3 1997 0 2 0 0 0 0 0 0 0 0 0 0 2 1998 4 7 0 0 0 0 0 0 0 0 0 0 11 1999 1 0 0 0 0 0 0 0 0 0 0 0 1 2000 0 1 0 0 0 0 0 0 0 0 0 0 1 2001 3 0 0 0 0 0 0 0 0 0 0 0 3 2002 6 0 0 0 0 0 0 0 0 0 0 0 6 2003 0 0 0 0 0 0 0 0 0 0 0 0 0 MEAN 6 4 0 0 0 0 0 0 0 0 0 2 12 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 21 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 0 0 0 0 7 31 29 6 3 0 0 76 1965 0 0 0 0 0 7 21 18 1 0 0 0 47 1966 0 0 0 0 0 21 31 28 2 *** 0 0 *** 1967 0 0 0 0 0 4 28 28 2 0 0 0 62 1968 0 0 0 0 0 2 28 24 2 0 0 0 56 1969 0 0 0 0 0 3 21 15 0 0 0 0 39 1970 0 0 0 0 0 *** 20 29 9 0 0 0 *** 1971 0 0 0 0 0 10 23 27 8 0 0 0 68 1972 0 0 0 0 0 2 26 6 1 0 0 0 35 1973 0 0 0 0 0 14 15 17 3 0 0 0 49 1974 0 0 0 0 0 10 17 20 *** 0 *** 0 *** 1975 0 0 0 0 0 0 31 31 2 0 0 0 64 1976 0 0 0 0 0 8 27 22 9 0 0 0 66 1977 0 0 0 0 0 16 30 26 0 0 0 0 72 1978 0 0 0 0 0 7 17 29 6 0 0 0 59 1979 0 0 0 0 0 5 30 8 6 0 0 0 49 1980 0 *** *** 0 0 10 30 26 6 0 0 0 *** 1981 0 0 0 0 0 3 20 26 0 0 0 0 49 1982 0 0 1 0 0 16 24 29 1 0 0 0 71 1983 0 0 0 0 0 15 31 30 10 0 0 0 86 1984 0 0 0 0 0 19 28 31 8 0 0 0 86 1985 0 0 0 0 0 10 27 13 6 1 0 0 57 1986 0 0 0 0 0 6 27 13 0 0 0 0 46 1987 0 0 0 0 1 17 21 25 7 0 0 0 71 1988 0 0 0 0 0 5 27 22 9 0 0 0 63 1989 0 0 0 0 0 15 26 28 9 0 0 0 78 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 0 0 0 0 0 10 *** 31 24 0 0 0 *** 1992 0 0 *** 0 0 4 29 19 1 0 0 0 *** 1993 0 *** *** *** 0 13 27 31 *** *** *** *** *** 1994 *** *** *** *** *** 6 31 10 0 0 0 0 *** 1995 0 0 0 0 *** 0 29 31 11 0 0 0 *** 1996 0 0 0 0 0 7 16 25 8 0 0 0 56 1997 0 0 0 0 0 4 27 31 1 0 0 0 63 1998 0 0 0 0 0 11 24 23 6 0 0 0 64 1999 0 0 0 0 2 14 21 31 10 0 0 0 78 2000 0 0 0 0 0 14 28 30 6 0 0 0 78 2001 0 0 0 0 0 14 25 25 4 0 0 0 68 2002 0 0 0 0 0 7 23 28 13 0 0 0 71 2003 0 0 0 0 0 12 30 31 11 0 0 0 84 MEAN 0 0 0 0 0 9 25 24 6 0 0 0 64 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 22 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 0 0 0 0 0 0 0 0 0 0 0 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 1966 0 0 0 0 0 0 0 0 0 *** 0 0 *** 1967 0 0 0 0 0 0 0 0 0 0 0 0 0 1968 0 0 0 0 0 0 0 0 0 0 0 0 0 1969 0 0 0 0 0 0 0 0 0 0 0 0 0 1970 0 0 0 0 0 *** 0 0 0 0 0 0 *** 1971 0 0 0 0 0 0 0 0 0 0 0 0 0 1972 0 0 0 0 0 0 0 0 0 0 0 0 0 1973 0 0 0 0 0 0 0 0 0 0 0 0 0 1974 0 0 0 0 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 *** 1981 0 0 0 0 0 0 0 0 0 0 0 0 0 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 0 0 0 0 0 0 0 0 0 0 0 0 0 1984 0 0 0 0 0 0 0 0 0 0 0 0 0 1985 0 0 0 0 0 0 0 0 0 0 0 0 0 1986 0 0 0 0 0 0 0 0 0 0 0 0 0 1987 0 0 0 0 0 0 0 0 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 0 0 *** 1992 0 0 *** 0 0 0 0 0 0 0 0 0 *** 1993 0 *** *** *** 0 0 0 0 *** *** *** *** *** 1994 *** *** *** *** *** 0 0 0 0 0 0 0 *** 1995 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 2001 0 0 0 0 0 0 0 0 0 0 0 0 0 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 2003 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 SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 0 0 0 0 0 0 0 0 0 1965 0 0 0 0 0 0 0 0 0 0 0 0 0 1966 0 0 0 0 0 0 0 0 0 *** 0 0 *** 1967 0 0 0 0 0 0 0 0 0 0 0 0 0 1968 0 0 0 0 0 0 0 0 0 0 0 0 0 1969 0 0 0 0 0 0 0 0 0 0 0 0 0 1970 0 0 0 0 0 *** 0 0 0 0 0 0 *** 1971 0 0 0 0 0 0 0 0 0 0 0 0 0 1972 0 0 0 0 0 0 0 0 0 0 0 0 0 1973 0 0 0 0 0 0 0 0 0 0 0 0 0 1974 0 0 0 0 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 *** 1981 0 0 0 0 0 0 0 0 0 0 0 0 0 1982 0 0 0 0 0 0 0 0 0 0 0 0 0 1983 0 0 0 0 0 0 0 0 0 0 0 0 0 1984 0 0 0 0 0 0 0 0 0 0 0 0 0 1985 0 0 0 0 0 0 0 0 0 0 0 0 0 1986 0 0 0 0 0 0 0 0 0 0 0 0 0 1987 0 0 0 0 0 0 0 0 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 0 0 *** 1992 0 0 *** 0 0 0 0 0 0 0 0 0 *** 1993 0 *** *** *** 0 0 0 0 *** *** *** *** *** 1994 *** *** *** *** *** 0 0 0 0 0 0 0 *** 1995 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 2001 0 0 0 0 0 0 0 0 0 0 0 0 0 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 2003 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 SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 31 29 31 21 3 0 0 0 0 0 30 31 176 11 1 5 6 1965 31 27 30 23 2 0 0 0 0 9 25 31 178 10 23 5 5 1966 31 28 30 20 3 0 0 0 2 0 22 26 162 9 17 5 7 1967 31 28 31 20 1 0 0 0 0 2 12 29 154 10 16 5 1 1968 31 29 21 19 0 0 0 0 0 3 10 25 138 10 26 4 30 1969 31 28 4 8 0 0 0 0 0 0 22 23 116 11 4 4 22 1970 31 22 25 2 0 *** 0 0 0 6 5 29 *** 10 11 4 25 1971 31 28 14 9 0 0 0 0 0 8 14 29 133 10 10 4 21 1972 31 29 31 3 0 0 0 0 0 0 17 31 142 11 2 4 7 1973 31 28 29 2 0 0 0 0 0 0 15 28 133 11 6 4 10 1974 31 28 18 3 0 0 0 0 *** 13 *** 31 *** 10 18 4 13 1975 31 28 31 17 0 0 0 0 0 22 23 31 183 10 7 4 30 1976 30 27 31 10 0 0 0 0 0 0 20 24 142 11 2 4 28 1977 31 25 7 2 0 0 0 0 0 4 16 23 108 10 24 4 17 1978 27 16 13 2 0 0 0 0 0 0 23 16 97 11 5 4 15 1979 21 24 22 7 0 0 0 0 0 0 20 25 119 11 5 4 29 1980 30 *** *** 2 0 0 0 0 0 12 10 24 *** 10 9 4 18 1981 24 22 12 6 0 0 0 0 0 1 13 13 91 10 31 4 19 1982 29 28 16 2 0 0 0 0 0 0 21 29 125 11 2 4 10 1983 27 28 27 9 0 0 0 0 0 5 8 21 125 10 8 4 15 1984 29 26 16 5 1 0 0 0 0 6 6 29 118 10 13 5 2 1985 22 25 12 2 0 0 0 0 0 7 10 28 106 10 10 4 10 1986 26 26 23 2 0 0 0 0 0 3 22 28 130 10 24 4 5 1987 27 20 19 6 0 0 0 0 0 2 15 16 105 10 9 4 8 1988 30 27 13 4 0 0 0 0 0 0 11 23 108 11 15 4 4 1989 31 28 19 6 0 0 0 0 0 0 9 28 121 11 2 4 6 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** ** ** ** ** 1991 31 27 18 2 1 0 *** 0 0 0 14 31 *** 11 12 5 3 1992 31 29 *** 0 0 0 0 0 0 5 21 22 *** 10 26 2 29 1993 30 *** *** *** 0 0 0 0 *** *** *** *** *** 1 1 1 31 1994 *** *** *** *** *** 0 0 0 0 0 0 18 *** 12 4 12 31 1995 28 21 11 0 *** 0 0 0 0 1 *** 31 *** 10 18 3 20 1996 28 25 27 5 0 0 0 0 0 6 17 24 132 10 16 4 17 1997 27 27 24 9 1 0 0 0 0 2 19 29 138 10 25 5 6 1998 25 22 21 5 0 0 0 0 0 0 10 4 87 11 1 4 10 1999 27 22 28 4 0 0 0 0 0 0 23 26 130 11 2 4 12 2000 30 29 25 3 0 0 0 0 0 4 16 30 137 10 10 4 7 2001 28 26 17 1 0 0 0 0 0 0 8 10 90 11 2 4 18 2002 27 21 20 3 0 0 0 0 0 0 14 30 115 11 3 4 5 2003 29 27 27 9 1 0 0 0 1 1 18 31 144 9 20 5 1 MEAN 29 26 21 7 0 0 0 0 0 3 16 25 127 9 17 5 7 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 25 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 -11.0 -0.7 5.6 8.0 16.9 22.7 27.9 25.8 20.8 18.1 3.4 -5.6 11.0 1965 -5.8 -1.0 4.7 7.5 18.3 22.8 26.1 24.9 19.7 12.2 7.1 0.5 11.4 1966 1.9 -0.6 4.3 9.5 16.0 23.4 26.4 25.1 19.3 12.0 7.1 3.2 12.3 1967 -0.5 -2.2 1.8 7.3 14.6 19.6 27.5 25.4 18.7 11.2 7.1 0.6 10.9 1968 -1.8 -3.4 4.5 8.0 14.2 20.5 24.2 24.4 18.2 13.1 6.9 2.5 10.9 1969 -2.6 -2.5 7.9 9.2 16.1 21.7 25.2 23.0 17.6 14.6 4.7 3.6 11.5 1970 -1.6 3.3 4.6 12.0 17.0 ****** 24.8 24.8 19.3 13.3 8.9 -0.6 ****** 1971 -0.6 -0.3 5.5 7.8 16.9 22.0 25.6 24.7 19.2 12.8 7.5 0.6 11.8 1972 -3.3 -7.8 2.1 9.6 11.7 20.6 25.1 21.8 19.5 14.4 7.3 -5.1 9.7 1973 -6.2 3.1 5.0 10.8 16.5 23.4 24.1 25.0 19.7 14.3 6.5 1.3 12.0 1974 -5.8 -5.5 4.8 9.8 18.1 22.6 23.5 23.9 ****** 11.8 ****** -0.1 ****** 1975 -3.5 -3.1 4.0 9.3 15.4 21.0 25.6 25.5 20.6 11.3 4.9 -2.4 10.7 1976 -0.8 -2.0 -0.9 8.6 14.8 22.0 25.6 24.5 20.2 13.1 5.7 2.3 11.1 1977 -5.0 1.6 8.5 10.1 15.7 22.9 26.8 24.9 20.6 12.1 6.2 2.7 12.3 1978 0.9 2.7 5.4 11.9 16.1 20.7 24.1 24.7 20.2 13.7 3.4 4.7 12.4 1979 0.9 3.3 2.7 12.1 14.4 20.8 26.3 23.0 19.8 14.0 8.3 -0.4 12.1 1980 -2.5 ****** ****** 11.9 16.2 22.3 25.7 25.2 19.3 13.7 7.7 2.7 ****** 1981 0.0 1.0 5.8 10.5 15.2 19.9 25.0 24.5 18.4 11.7 8.1 5.7 12.1 1982 -0.5 -3.8 2.3 12.3 16.5 22.1 23.9 24.1 19.8 12.0 3.6 -5.7 10.5 1983 -3.7 -3.3 0.6 7.5 15.7 22.2 25.2 25.3 19.6 12.7 8.7 -0.1 10.9 1984 -3.0 0.3 5.7 10.8 12.7 22.0 24.9 25.0 18.8 11.7 6.6 -1.8 11.1 1985 1.9 0.0 3.8 10.8 16.0 22.5 25.8 21.4 15.7 12.8 7.0 0.6 11.5 1986 0.5 0.4 2.3 9.6 14.4 21.1 25.4 22.7 18.3 14.0 2.7 -1.9 10.8 1987 2.5 3.5 3.1 10.6 17.8 23.1 23.0 23.5 19.7 10.0 7.9 1.6 12.2 1988 -2.4 -1.9 5.5 10.0 17.1 21.6 25.4 24.0 19.9 14.6 7.2 3.1 12.0 1989 -6.8 -6.1 3.2 10.1 15.8 23.2 25.8 24.8 18.0 13.4 6.7 0.8 10.8 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 -0.8 -2.2 5.1 11.5 15.5 20.9 ****** 28.3 21.6 14.4 8.4 0.6 ****** 1992 -7.4 -5.3 ****** 12.8 13.2 19.9 24.7 22.4 18.2 12.2 5.3 0.6 ****** 1993 -3.2 ****** ****** ****** 13.6 19.8 23.3 25.8 ****** ****** ****** ****** ****** 1994 ****** ****** ****** ****** ****** 21.3 27.8 20.5 13.0 9.2 7.9 0.3 ****** 1995 1.9 3.6 8.0 12.1 ****** 17.8 27.1 27.0 20.5 14.4 8.9 0.8 ****** 1996 -3.3 1.8 2.7 9.3 16.9 22.2 24.3 23.9 20.2 13.2 6.4 4.4 11.8 1997 1.9 -0.3 1.9 9.0 14.6 21.5 26.8 26.9 19.7 14.5 5.3 2.1 12.0 1998 -1.9 -1.4 3.8 11.5 15.9 23.3 25.7 25.0 20.9 13.5 9.6 8.4 12.9 1999 0.3 3.4 3.9 11.0 18.3 23.5 24.6 25.7 20.5 14.9 6.2 3.7 13.0 2000 -1.4 -1.3 4.9 13.1 18.7 23.1 25.8 24.8 20.6 12.0 5.5 0.4 12.2 2001 0.4 1.5 7.4 13.0 17.1 21.6 25.1 24.8 19.2 14.6 8.1 4.9 13.1 2002 -2.3 2.8 6.7 10.4 16.7 21.4 24.4 25.0 21.6 15.6 6.4 1.9 12.5 2003 0.6 0.8 3.8 10.9 15.6 22.0 26.5 24.6 20.2 15.4 6.0 -0.0 12.2 MEAN -1.9 -0.6 4.3 10.3 15.8 21.7 25.4 24.5 19.4 13.2 6.6 1.1 11.7 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 26 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 -21.8 -7.4 -4.3 -4.8 -3.1 -1.2 0.3 0.6 2.9 -3.3 -8.5 -14.5 -5.4 1965 -14.2 -9.3 -5.3 -5.2 -1.8 -2.8 -0.2 0.4 -0.9 -1.3 -3.3 -9.7 -4.5 1966 -5.7 -7.5 -5.3 -4.2 -2.0 3.9 8.0 3.6 0.2 -0.2 -6.3 -8.1 -2.0 1967 -9.9 -13.2 -6.9 -4.3 -0.2 -0.6 0.8 -0.2 0.4 -1.7 -4.1 -14.2 -4.5 1968 -13.6 ****** -8.7 -1.8 1.1 0.5 1.3 0.2 -1.8 -0.5 -1.7 -4.8 ****** 1969 -10.8 -9.7 -1.0 -1.3 1.3 1.0 3.0 1.4 1.3 -0.2 -5.3 -5.5 -2.1 1970 -8.3 -5.7 -4.1 -3.1 -4.1 ****** 0.4 -1.6 -4.6 -8.2 -5.2 -10.0 ****** 1971 -7.8 -5.8 -3.6 -1.5 1.6 0.7 3.6 3.7 0.4 -5.7 -2.1 -8.1 -2.0 1972 -10.7 -15.5 -3.3 0.2 0.8 4.4 4.2 7.4 7.0 2.1 -1.6 -11.0 -1.3 1973 ****** -3.8 -3.5 -0.5 3.3 7.1 7.1 18.0 9.8 2.3 -4.0 -6.8 ****** 1974 ****** ****** -2.3 0.9 6.5 7.4 10.5 14.0 ****** 1.8 ****** -10.2 ****** 1975 -20.8 ****** -4.1 -0.7 5.1 12.9 14.4 15.9 7.9 -3.8 -4.1 -10.9 ****** 1976 -5.8 -7.9 -8.3 1.4 5.0 7.6 14.7 9.5 7.8 4.7 -1.1 -3.3 2.0 1977 -9.0 -4.3 -0.5 2.7 6.8 9.8 12.5 11.6 7.9 3.8 -0.1 -2.6 3.2 1978 -6.6 -4.5 -2.1 0.4 4.8 7.9 10.9 10.7 7.2 2.4 -4.4 -2.9 2.0 1979 -3.6 -3.0 -1.1 2.7 6.7 10.3 12.6 10.0 7.0 4.5 -0.7 -4.1 3.4 1980 -7.5 ****** ****** 2.9 6.6 10.6 12.9 12.2 6.2 1.0 1.7 -4.2 ****** 1981 -6.2 -5.5 -1.4 2.5 5.8 10.0 14.5 12.8 5.8 4.0 -0.3 -2.6 3.3 1982 -11.3 -15.1 -5.3 4.6 9.3 12.8 10.7 11.8 6.9 2.8 -3.3 -16.3 0.6 1983 -13.1 -12.8 -8.5 1.2 9.0 13.6 17.3 17.5 12.3 4.8 0.6 -9.8 2.7 1984 -10.3 -9.5 -2.1 3.4 6.0 14.0 14.3 12.9 8.0 -0.8 -0.4 -8.7 2.2 1985 -4.9 -6.7 -3.8 2.9 7.1 12.4 13.8 9.0 3.8 -2.4 -1.3 -6.5 1.9 1986 -6.2 -7.2 -4.9 2.2 2.6 3.6 5.2 3.1 -2.7 -1.2 -6.2 -10.2 -1.8 1987 -6.0 -4.8 -2.9 0.1 5.3 4.0 5.6 2.7 1.4 0.5 -5.0 -8.8 -0.7 1988 -12.1 -12.3 -3.5 -0.6 0.5 -0.6 3.1 2.7 -2.4 -3.8 -4.9 -7.3 -3.4 1989 -15.7 -14.6 -3.9 -2.4 -0.1 -1.8 -0.2 -0.9 -4.2 -4.1 -2.8 -7.4 -4.8 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 -7.2 -8.7 -3.3 -2.7 -2.9 -0.2 ****** 4.6 5.0 2.8 -2.0 -8.3 ****** 1992 -12.4 -10.5 ****** 4.9 3.1 6.1 4.5 1.2 -3.7 -6.5 -2.8 -3.3 ****** 1993 ****** ****** ****** ****** 2.1 1.7 5.3 20.0 ****** ****** ****** ****** ****** 1994 ****** ****** ****** ****** ****** 1.5 12.9 2.3 2.3 3.2 2.5 -4.3 ****** 1995 -3.5 -3.3 -2.5 3.4 ****** 6.9 5.2 6.2 3.5 2.7 0.7 -4.2 ****** 1996 -7.6 -3.0 -0.9 -0.6 3.5 5.2 5.1 1.7 -3.1 -3.1 -1.2 -3.0 -0.6 1997 -3.6 -6.4 -4.2 -1.9 -0.1 1.0 2.3 0.8 -2.0 -1.9 -1.2 -3.6 -1.7 1998 -5.6 -7.2 -4.1 -1.6 0.8 -0.4 2.2 3.2 -0.9 -4.2 -6.4 -6.1 -2.5 1999 -6.1 -5.7 -5.7 -0.9 -3.5 -3.4 1.7 1.1 -3.3 -4.4 -4.9 -5.8 -3.4 2000 -6.9 -7.4 -6.8 -2.6 -3.6 -4.2 -1.2 -2.1 -3.4 -4.3 -3.5 -5.4 -4.3 2001 -8.9 -4.5 -4.9 -5.1 -3.4 2.3 -0.1 -2.6 -2.9 -3.6 -4.6 -2.6 -3.4 2002 -8.8 -5.6 -6.4 -2.7 -3.3 -4.5 0.0 -2.3 -4.5 -4.5 -3.9 -4.6 -4.2 2003 -8.3 -5.4 -5.4 -0.2 2.9 3.7 7.6 6.1 1.2 -0.3 -3.7 -6.9 -0.7 MEAN -9.2 -7.7 -4.1 -0.3 2.2 4.3 6.5 5.9 2.0 -0.7 -2.8 -7.0 -0.9 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 27 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 1.22 3.08 3.69 3.56 4.05 4.68 5.13 5.25 6.34 4.01 2.75 2.05 3.82 1965 2.05 2.95 3.51 3.48 4.51 4.14 4.92 5.19 4.80 4.70 4.01 2.63 3.91 1966 3.36 2.98 3.50 3.75 4.46 6.74 8.77 6.88 5.17 4.96 3.33 3.05 4.75 1967 2.65 2.18 3.29 3.78 5.03 4.85 5.33 4.96 5.25 4.48 3.87 2.13 3.98 1968 2.11 ****** 3.08 4.48 5.54 5.27 5.48 5.17 4.48 4.91 4.52 3.66 ****** 1969 2.51 3.04 4.78 4.81 5.66 5.43 6.36 5.79 5.66 5.04 3.65 3.47 4.68 1970 2.99 3.44 3.80 4.13 3.98 ****** 5.24 4.59 3.78 2.92 3.57 2.74 ****** 1971 2.99 3.46 4.03 4.61 5.71 5.42 6.56 6.55 5.31 3.45 4.51 2.99 4.63 1972 2.46 1.93 4.07 5.20 5.46 7.19 6.91 8.65 8.56 6.26 4.59 2.65 5.33 1973 ****** 4.13 4.01 4.86 6.56 8.75 8.61 17.76 11.53 6.13 4.21 3.52 ****** 1974 ****** ****** 4.61 5.64 8.54 8.75 10.84 13.81 ****** 5.99 ****** 2.76 ****** 1975 1.25 ****** 3.92 4.95 7.50 12.56 14.11 15.92 9.79 4.26 3.95 2.59 ****** 1976 3.61 3.06 3.25 5.69 7.26 8.74 14.38 9.87 8.91 7.15 4.80 4.21 6.74 1977 2.86 3.94 4.97 6.28 8.20 10.04 12.15 11.39 8.92 6.81 5.17 4.31 7.09 1978 3.36 3.92 4.49 5.29 7.29 9.01 10.93 10.74 8.61 6.13 3.87 4.21 6.49 1979 4.02 4.23 4.84 6.35 8.27 10.43 12.09 10.19 8.52 7.10 5.04 3.86 7.08 1980 2.98 ****** ****** 6.41 8.23 10.76 12.38 11.91 8.26 5.60 5.86 3.99 ****** 1981 3.50 3.64 4.82 6.37 7.89 10.37 13.95 12.56 7.90 6.90 5.11 4.49 7.29 1982 2.71 1.96 3.73 7.21 9.92 12.72 10.87 11.61 8.41 6.23 4.16 1.90 6.78 1983 2.36 2.28 3.13 5.82 9.74 13.48 17.06 17.49 12.61 7.74 5.50 2.98 8.35 1984 2.70 2.80 4.72 6.75 7.98 13.99 13.98 12.64 9.38 5.08 5.01 2.88 7.32 1985 3.85 3.33 4.09 6.33 8.75 12.51 13.62 9.93 7.17 4.42 4.88 3.38 6.85 1986 3.38 3.17 3.70 5.97 6.18 6.54 7.37 6.42 4.31 4.69 3.44 2.66 4.82 1987 3.51 3.74 4.22 5.27 7.52 6.82 7.66 6.23 5.65 5.35 3.65 3.05 5.22 1988 2.25 2.31 4.02 5.03 5.36 4.92 6.46 6.29 4.35 4.03 3.66 3.12 4.32 1989 1.72 1.98 4.00 4.36 5.15 4.53 5.30 4.84 3.82 3.92 4.28 3.20 3.93 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.09 2.83 4.13 4.28 4.18 5.18 ****** 7.49 7.55 6.27 4.53 2.86 ****** 1992 2.13 2.47 ****** 7.29 6.56 7.93 7.14 5.72 3.93 3.22 4.26 4.06 ****** 1993 ****** ****** ****** ****** 6.02 6.11 7.56 20.87 ****** ****** ****** ****** ****** 1994 ****** ****** ****** ****** ****** 5.81 12.57 6.56 6.09 6.50 6.17 4.17 ****** 1995 4.01 4.09 4.65 6.63 ****** 8.56 7.55 7.96 6.83 6.37 5.64 3.85 ****** 1996 3.30 4.18 4.82 5.08 6.62 7.52 7.33 6.23 4.20 4.28 4.83 4.16 5.21 1997 3.96 3.56 3.90 4.57 5.19 5.70 6.12 5.42 4.42 4.57 4.70 3.97 4.67 1998 3.53 3.25 4.00 4.68 5.49 5.20 6.00 6.49 4.89 4.11 3.23 3.42 4.52 1999 3.39 3.43 3.45 4.91 4.20 4.02 5.98 5.46 4.21 3.78 3.68 3.44 4.16 2000 3.22 3.29 3.20 4.35 4.03 3.84 4.73 4.41 4.00 3.94 3.99 3.55 3.88 2001 2.84 3.69 3.61 3.54 4.15 6.29 5.18 4.41 4.26 4.03 3.71 4.26 4.16 2002 2.97 3.41 3.34 4.26 4.26 3.83 5.20 4.41 3.79 3.69 3.87 3.66 3.89 2003 2.90 3.52 3.52 5.08 6.35 6.68 8.68 7.85 5.59 4.99 4.01 3.24 5.20 MEAN 2.91 3.19 3.97 5.16 6.26 7.51 8.70 8.61 6.41 5.11 4.32 3.35 5.46 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 28 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. AVERAGE OF VAPOUR PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 1.46 3.73 4.49 4.34 4.97 5.76 6.35 6.49 7.78 4.92 3.33 2.47 4.67 1965 2.47 3.57 4.26 4.24 5.54 5.11 6.08 6.40 5.89 5.74 4.87 3.18 4.78 1966 4.07 3.61 4.25 4.57 5.46 8.28 10.77 8.45 6.34 6.05 4.06 3.70 5.80 1967 3.21 2.64 3.99 4.60 6.15 5.96 6.60 6.12 6.45 5.47 4.71 2.59 4.87 1968 2.56 ****** 3.75 5.45 6.76 6.47 6.76 6.37 5.51 6.00 5.49 4.43 ****** 1969 3.03 3.67 5.81 5.85 6.92 6.68 7.83 7.12 6.93 6.16 4.43 4.21 5.72 1970 3.61 4.17 4.61 5.04 4.88 ****** 6.46 5.67 4.65 3.58 4.35 3.31 ****** 1971 3.62 4.18 4.89 5.61 6.99 6.67 8.08 8.06 6.52 4.22 5.48 3.63 5.66 1972 2.97 2.33 4.92 6.32 6.65 8.80 8.50 10.59 10.46 7.63 5.58 3.20 6.50 1973 ****** 5.00 4.87 5.92 8.02 10.72 10.56 21.47 13.97 7.49 5.12 4.27 ****** 1974 ****** ****** 5.60 6.86 10.40 10.71 13.23 16.78 ****** 7.30 ****** 3.34 ****** 1975 1.51 ****** 4.76 6.02 9.14 15.26 17.16 19.27 11.92 5.20 4.79 3.13 ****** 1976 4.36 3.70 3.93 6.92 8.85 10.69 17.48 12.09 10.88 8.71 5.82 5.10 8.21 1977 3.45 4.78 6.04 7.63 9.99 12.27 14.86 13.91 10.90 8.28 6.27 5.21 8.63 1978 4.06 4.75 5.45 6.45 8.90 11.02 13.36 13.14 10.53 7.49 4.69 5.11 7.91 1979 4.87 5.12 5.86 7.73 10.05 12.72 14.78 12.46 10.42 8.66 6.13 4.67 8.62 1980 3.60 ****** ****** 7.80 10.03 13.14 15.11 14.54 10.10 6.84 7.11 4.84 ****** 1981 4.23 4.41 5.85 7.75 9.61 12.64 16.97 15.31 9.65 8.39 6.21 5.45 8.87 1982 3.28 2.37 4.52 8.78 12.06 15.46 13.28 14.17 10.28 7.58 5.04 2.29 8.26 1983 2.85 2.75 3.79 7.06 11.84 16.37 20.65 21.15 15.30 9.41 6.68 3.61 10.12 1984 3.26 3.39 5.73 8.21 9.70 16.96 17.00 15.41 11.43 6.19 6.08 3.48 8.90 1985 4.66 4.03 4.96 7.70 10.65 15.21 16.59 12.12 8.73 5.41 5.93 4.09 8.34 1986 4.09 3.84 4.48 7.25 7.54 8.03 9.06 7.88 5.30 5.73 4.17 3.22 5.88 1987 4.26 4.54 5.11 6.41 9.19 8.38 9.39 7.67 6.94 6.50 4.45 3.69 6.38 1988 2.72 2.80 4.88 6.13 6.57 6.05 7.95 7.73 5.35 4.93 4.45 3.78 5.28 1989 2.07 2.39 4.85 5.32 6.30 5.58 6.53 5.97 4.69 4.79 5.20 3.87 4.80 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 3.73 3.42 5.01 5.22 5.12 6.36 ****** 9.23 9.25 7.65 5.51 3.46 ****** 1992 2.56 2.97 ****** 8.86 7.98 9.69 8.78 7.02 4.82 3.94 5.17 4.90 ****** 1993 ****** ****** ****** ****** 7.34 7.49 9.28 25.05 ****** ****** ****** ****** ****** 1994 ****** ****** ****** ****** ****** 7.13 15.35 8.03 7.42 7.89 7.48 5.04 ****** 1995 4.86 4.96 5.65 8.07 ****** 10.42 9.29 9.79 8.37 7.77 6.86 4.65 ****** 1996 3.98 5.06 5.82 6.17 8.09 9.22 9.00 7.64 5.16 5.22 5.87 5.05 6.36 1997 4.79 4.30 4.72 5.55 6.34 7.00 7.55 6.70 5.43 5.59 5.70 4.80 5.71 1998 4.26 3.92 4.84 5.70 6.71 6.40 7.40 7.98 6.01 5.02 3.94 4.17 5.53 1999 4.10 4.16 4.18 5.98 5.15 4.96 7.35 6.73 5.18 4.62 4.47 4.17 5.09 2000 3.89 3.97 3.89 5.31 4.95 4.74 5.85 5.44 4.92 4.81 4.84 4.29 4.74 2001 3.43 4.47 4.39 4.33 5.09 7.71 6.38 5.44 5.23 4.93 4.51 5.16 5.09 2002 3.59 4.13 4.06 5.19 5.22 4.72 6.41 5.44 4.67 4.53 4.70 4.43 4.76 2003 3.52 4.25 4.27 6.19 7.75 8.20 10.67 9.64 6.86 6.11 4.87 3.92 6.35 MEAN 3.51 3.86 4.81 6.28 7.65 9.18 10.65 10.53 7.84 6.23 5.25 4.05 6.65 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 29 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. AVERAGE OF SATURATION DEFICIT PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 1.63 2.32 5.00 6.87 14.90 22.50 32.27 28.01 18.08 16.76 5.09 2.17 12.97 1965 1.76 2.51 4.76 6.82 16.33 23.23 28.44 25.75 17.77 8.85 5.39 3.65 12.10 1966 3.17 2.49 4.54 7.69 13.45 21.37 24.36 24.49 17.22 8.63 6.70 4.45 11.55 1967 3.40 2.75 3.39 6.32 11.07 18.20 31.56 27.43 16.21 8.57 5.89 4.58 11.61 1968 4.44 ****** 5.09 5.78 9.88 18.38 24.26 25.29 16.79 10.19 4.69 3.02 ****** 1969 2.53 2.28 5.06 6.36 12.03 19.88 25.64 22.13 14.43 11.22 4.50 4.22 10.86 1970 2.09 3.81 4.31 9.70 15.73 ****** 25.93 26.97 19.27 12.91 7.48 2.96 ****** 1971 2.60 2.45 4.55 5.38 12.68 21.03 25.96 24.40 17.28 11.40 5.21 3.49 11.37 1972 2.23 1.48 2.42 6.13 7.64 16.29 24.64 16.40 13.56 10.00 5.16 1.85 8.98 1973 ****** 3.44 4.68 7.61 11.60 19.91 20.82 11.30 10.60 10.02 5.63 3.00 ****** 1974 ****** ****** 3.55 5.85 10.99 18.20 16.80 13.92 ****** 7.32 ****** 3.04 ****** 1975 3.57 ****** 3.79 6.32 9.27 10.04 17.29 14.81 13.15 9.26 4.29 2.52 ****** 1976 2.08 1.77 2.44 4.75 8.41 16.91 16.43 19.74 14.22 6.98 3.73 2.56 8.33 1977 1.46 2.79 5.45 5.27 8.35 16.86 21.84 18.72 14.53 6.92 3.65 2.48 9.03 1978 2.74 3.21 3.94 7.97 10.29 14.60 17.72 19.25 14.98 9.17 3.45 3.63 9.25 1979 2.66 2.88 3.13 7.15 7.11 12.86 20.49 16.73 14.41 8.32 5.67 2.66 8.67 1980 2.22 ****** ****** 6.65 9.18 15.04 18.81 18.58 13.95 10.10 3.74 3.46 ****** 1981 2.18 2.39 3.88 5.68 8.43 11.46 15.68 16.71 13.22 6.11 5.10 4.01 7.90 1982 3.05 2.46 2.97 6.13 7.29 12.16 17.66 17.29 14.14 6.96 3.26 2.15 7.96 1983 2.25 2.34 2.79 3.86 6.66 11.62 12.67 12.52 9.16 6.52 5.04 3.14 6.55 1984 2.87 3.27 3.95 5.30 5.56 11.03 15.35 17.71 11.82 8.42 3.96 2.13 7.61 1985 2.75 2.40 3.83 5.70 8.45 13.30 17.72 14.39 9.64 10.54 4.39 2.55 7.97 1986 2.57 2.79 3.17 5.08 9.53 18.07 24.27 20.77 17.05 11.25 3.79 2.33 10.06 1987 3.45 3.74 2.82 7.11 12.00 20.93 20.14 22.68 17.46 6.42 6.90 3.68 10.61 1988 2.61 2.87 4.45 6.73 13.50 20.50 25.81 23.27 19.40 12.53 6.36 4.30 11.86 1989 1.88 1.96 3.11 7.73 12.70 23.92 27.79 26.33 17.55 11.54 4.94 2.91 11.86 1990 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** 1991 2.29 2.12 4.33 9.05 13.40 19.35 ****** 31.84 18.16 9.25 6.19 3.30 ****** 1992 1.21 1.42 ****** 6.41 7.63 14.14 23.28 21.53 17.15 11.42 4.28 1.70 ****** 1993 ****** ****** ****** ****** 9.12 16.81 20.39 8.85 ****** ****** ****** ****** ****** 1994 ****** ****** ****** ****** ****** 19.14 23.11 17.56 8.22 4.03 3.37 1.70 ****** 1995 2.39 3.33 5.48 6.68 ****** 10.94 27.71 26.80 17.28 9.47 5.10 2.08 ****** 1996 1.25 2.08 1.85 6.15 11.79 18.41 21.99 23.28 20.04 10.97 4.28 3.63 10.48 1997 2.41 2.12 2.61 6.61 10.89 19.44 29.10 30.08 18.75 11.82 3.49 2.54 11.66 1998 1.31 1.90 3.65 8.54 12.21 23.14 26.79 24.84 19.71 11.38 8.63 7.34 12.45 1999 2.46 3.92 4.34 7.65 16.69 24.87 24.80 27.09 20.48 13.35 5.52 4.36 12.96 2000 2.00 2.15 5.19 10.39 17.28 24.74 28.27 27.06 20.68 9.95 4.48 2.33 12.88 2001 3.46 2.56 6.36 11.20 15.15 19.50 26.78 27.30 18.57 12.51 6.74 3.67 12.82 2002 2.07 3.62 6.41 8.08 14.51 21.57 25.12 27.77 22.78 14.26 5.37 2.78 12.86 2003 3.28 2.46 4.21 7.56 10.56 19.38 25.66 22.82 18.39 12.19 5.14 2.39 11.17 MEAN 2.47 2.61 4.04 6.87 11.14 17.89 22.98 21.60 16.11 9.93 5.04 3.12 10.32 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 30 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. AVERAGE OF RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 45 62 52 44 27 22 18 21 32 25 46 51 37 1965 54 56 51 44 28 19 19 22 27 40 48 49 38 1966 58 61 52 40 31 29 32 29 31 46 41 47 41 1967 49 48 56 45 39 28 19 20 31 43 47 36 38 1968 37 *** 42 54 44 29 23 22 27 42 57 61 *** 1969 54 58 56 52 40 27 26 28 35 39 52 54 43 1970 63 54 58 40 29 *** 22 19 22 26 40 53 *** 1971 60 64 55 54 38 26 26 28 30 30 53 52 43 1972 56 56 69 55 51 37 27 41 46 46 56 60 50 1973 *** 61 55 48 43 36 34 66 56 46 49 58 *** 1974 *** *** 62 57 48 39 46 55 *** 53 *** 50 *** 1975 31 *** 57 52 53 61 51 57 47 36 55 55 *** 1976 66 66 60 62 53 41 53 39 46 58 63 69 56 1977 68 66 55 62 57 45 42 45 45 60 65 69 57 1978 59 60 60 46 49 45 44 42 44 48 59 59 51 1979 66 64 66 54 62 52 43 45 45 55 55 65 56 1980 61 *** *** 56 54 49 46 45 44 44 67 59 *** 1981 65 65 62 59 55 54 52 49 45 61 56 58 57 1982 50 47 59 60 63 56 44 47 44 55 62 50 53 1983 53 52 55 65 65 59 62 62 63 59 57 51 59 1984 51 48 58 61 64 61 52 48 50 45 62 60 55 1985 62 61 59 59 56 53 48 46 48 36 57 60 54 1986 62 58 60 61 47 33 29 30 26 38 54 55 46 1987 55 56 65 50 45 30 36 28 32 56 42 50 45 1988 49 47 54 51 35 25 26 28 25 32 46 50 39 1989 52 54 62 45 37 21 21 21 26 33 55 56 40 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 64 63 58 41 31 27 *** 24 35 48 51 54 *** 1992 68 67 *** 60 55 43 30 30 26 32 60 78 *** 1993 *** *** *** *** 50 34 32 74 *** *** *** *** *** 1994 *** *** *** *** *** 30 42 33 52 68 70 72 *** 1995 69 64 52 59 *** 54 27 28 36 50 59 72 *** 1996 75 73 80 56 45 36 31 28 24 38 61 61 51 1997 70 70 70 53 41 29 23 20 25 36 66 69 48 1998 77 68 62 45 41 24 24 28 26 37 36 41 42 1999 66 56 56 47 26 19 26 21 23 31 50 56 40 2000 68 65 48 37 25 18 18 18 22 39 56 67 40 2001 54 68 46 31 29 33 22 19 27 32 45 61 39 2002 63 57 46 45 29 20 22 19 19 28 52 64 39 2003 56 65 55 49 45 33 32 33 31 38 53 62 46 MEAN 59 60 58 51 44 36 33 35 35 43 54 58 47 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 31 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. AVERAGE OF MAXIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 63 71 68 59 34 32 25 32 41 32 68 65 49 1965 67 66 64 60 36 26 26 32 35 48 58 59 48 1966 67 71 65 50 40 40 44 50 47 65 57 58 55 1967 61 63 74 58 52 39 24 27 43 56 59 48 50 1968 47 *** 54 68 59 41 29 30 38 55 71 69 *** 1969 68 70 63 68 53 34 37 37 47 51 70 67 55 1970 74 67 75 54 42 *** 31 28 32 37 50 67 *** 1971 71 74 67 68 49 37 33 39 43 43 64 64 54 1972 68 69 78 70 67 47 36 51 56 60 67 77 62 1973 *** 72 66 61 54 45 40 73 68 60 57 68 *** 1974 *** *** 75 68 61 50 58 61 *** 70 *** 68 *** 1975 53 *** 66 66 64 68 62 68 57 47 66 70 *** 1976 78 76 72 73 66 53 62 47 56 69 73 80 67 1977 78 77 68 71 67 57 49 54 54 70 77 78 67 1978 68 70 71 53 58 53 52 50 55 61 68 66 60 1979 74 72 74 64 71 62 53 54 55 66 67 74 66 1980 69 *** *** 68 63 57 56 52 56 55 74 68 *** 1981 76 74 71 66 62 61 58 54 55 69 65 68 65 1982 65 63 68 66 69 61 50 56 53 67 71 64 63 1983 66 67 67 72 68 64 66 66 68 66 63 62 66 1984 61 59 67 65 68 65 58 54 58 56 69 69 62 1985 69 71 68 65 62 58 52 51 65 46 65 70 62 1986 71 67 69 70 53 43 39 44 37 51 63 68 56 1987 65 66 74 59 54 40 47 39 44 69 55 64 56 1988 59 61 64 65 45 37 37 41 38 44 60 61 51 1989 68 71 74 61 51 32 33 33 41 48 71 67 54 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 76 78 72 54 46 40 *** 32 43 63 66 71 *** 1992 78 75 *** 70 71 56 41 46 43 54 78 89 *** 1993 *** *** *** *** 66 48 40 84 *** *** *** *** *** 1994 *** *** *** *** *** 47 55 47 71 79 79 81 *** 1995 80 79 68 75 *** 69 37 36 50 61 70 87 *** 1996 88 86 91 77 62 47 39 40 38 60 75 75 65 1997 82 86 88 71 58 43 34 29 38 50 84 84 62 1998 87 82 78 61 59 37 36 39 38 53 55 56 57 1999 80 76 74 62 41 29 38 29 38 48 67 77 55 2000 80 80 74 54 37 27 27 26 34 60 75 79 54 2001 70 81 66 44 42 46 35 30 44 48 58 71 53 2002 76 72 69 61 42 29 34 31 30 44 71 78 53 2003 71 76 75 63 63 47 45 46 48 57 68 73 61 MEAN 71 72 71 64 56 47 43 45 47 56 67 70 59 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 32 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. AVERAGE OF MINIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1964 27 54 41 33 21 15 12 14 25 20 31 38 28 1965 42 47 41 33 22 14 14 16 21 33 40 40 30 1966 50 50 42 32 24 22 26 18 20 32 29 37 32 1967 38 35 39 34 28 19 14 15 22 31 36 23 28 1968 26 *** 30 41 30 20 18 16 20 32 45 52 *** 1969 41 46 49 39 30 21 18 21 27 30 39 43 34 1970 52 41 43 29 18 *** 16 13 15 17 30 40 *** 1971 49 53 43 43 30 18 21 20 22 21 43 40 34 1972 45 44 59 42 37 28 21 34 39 37 45 39 39 1973 *** 49 44 36 36 29 29 60 44 36 39 45 *** 1974 *** *** 50 46 37 31 37 49 *** 39 *** 32 *** 1975 14 *** 47 39 43 55 43 47 37 27 44 37 *** 1976 53 55 46 54 45 34 45 34 38 49 54 56 47 1977 57 54 45 53 48 37 37 38 38 51 55 59 48 1978 50 49 51 40 42 39 39 37 36 39 49 51 44 1979 57 56 59 46 54 45 37 39 38 45 44 56 48 1980 54 *** *** 47 47 43 39 40 36 35 60 50 *** 1981 52 53 53 52 48 47 48 44 38 54 49 48 49 1982 34 29 48 54 57 52 39 41 38 46 54 31 44 1983 37 35 39 58 61 54 58 59 59 53 51 39 50 1984 41 38 49 55 59 56 48 43 44 35 56 51 48 1985 54 50 50 53 51 48 43 41 33 29 47 49 46 1986 53 47 52 53 41 26 22 21 18 29 44 41 37 1987 45 47 57 42 38 24 28 21 24 47 32 36 37 1988 37 33 44 40 27 17 18 20 16 23 34 39 29 1989 36 40 51 32 28 13 13 13 16 22 42 44 29 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 51 49 46 30 21 15 *** 16 27 31 32 39 *** 1992 57 59 *** 49 39 32 19 17 14 17 46 67 *** 1993 *** *** *** *** 34 21 24 62 *** *** *** *** *** 1994 *** *** *** *** *** 19 34 23 38 59 61 63 *** 1995 57 49 38 44 *** 40 20 22 25 39 47 57 *** 1996 63 62 69 40 32 27 25 19 15 24 48 50 40 1997 59 46 51 39 29 19 15 14 17 26 51 56 35 1998 66 54 46 33 28 15 15 20 18 25 24 29 31 1999 52 41 42 37 16 12 17 16 13 20 37 39 29 2000 57 52 32 24 16 12 13 13 14 24 42 55 30 2001 40 55 33 22 20 24 14 13 17 22 34 53 29 2002 50 44 29 33 19 12 15 12 12 18 39 52 28 2003 42 53 39 39 34 23 24 24 21 25 38 50 34 MEAN 47 48 46 41 35 28 27 28 27 33 43 45 37 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 33 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 1 3 5 3 0 0 0 0 0 0 2 2 16 1965 3 1 3 3 1 0 0 0 0 5 4 4 24 1966 5 7 5 3 5 0 0 0 0 6 0 1 32 1967 1 2 3 3 1 0 0 0 0 1 3 0 14 1968 2 2 4 7 6 0 0 0 0 2 3 1 27 1969 8 2 6 4 3 0 0 1 0 3 2 4 33 1970 3 1 2 4 1 *** 0 0 0 0 1 3 *** 1971 1 0 4 5 1 0 0 0 0 0 5 4 20 1972 1 1 7 2 5 0 0 0 0 1 2 3 22 1973 1 2 4 3 0 0 0 0 0 0 1 1 12 1974 3 4 2 3 1 0 0 0 *** 1 *** 1 *** 1975 5 3 3 5 3 0 0 0 0 0 2 6 27 1976 4 5 4 9 2 1 0 0 0 3 3 3 34 1977 2 1 4 7 6 0 0 0 0 6 5 5 36 1978 4 4 4 1 0 0 0 0 0 1 1 8 23 1979 4 3 3 2 6 0 0 0 0 2 1 6 27 1980 2 *** *** 4 1 0 0 0 0 0 5 2 *** 1981 4 4 2 5 2 0 0 0 0 2 3 1 23 1982 3 4 11 2 5 0 0 0 0 8 5 1 39 1983 3 1 3 4 2 0 0 0 0 0 3 8 24 1984 4 0 5 2 1 0 0 0 0 1 4 5 22 1985 5 3 6 1 2 0 0 0 0 0 2 2 21 1986 1 1 5 8 4 0 0 0 0 1 7 1 28 1987 1 2 8 1 2 0 2 0 0 8 1 6 31 1988 7 8 5 6 1 0 0 0 0 2 3 3 35 1989 9 4 5 1 0 0 0 0 0 0 4 3 26 1990 *** *** *** *** *** *** *** *** *** *** *** *** *** 1991 4 2 5 0 0 0 *** 0 0 0 0 7 *** 1992 2 4 *** 5 8 1 0 1 0 0 4 5 *** 1993 4 *** *** *** 2 0 0 0 *** *** *** *** *** 1994 *** *** *** *** *** 0 0 0 4 8 6 1 *** 1995 1 3 3 7 *** 5 0 0 0 0 0 0 *** 1996 6 5 8 4 1 0 0 0 0 1 1 3 29 1997 1 0 5 8 6 0 0 0 0 0 4 3 27 1998 2 3 5 3 1 0 0 2 0 2 0 0 18 1999 1 2 3 2 1 0 1 0 0 0 1 3 14 2000 2 2 2 1 0 0 0 0 0 1 3 2 13 2001 0 3 3 0 2 1 0 0 0 0 1 5 15 2002 2 2 4 2 3 0 0 0 0 1 1 2 17 2003 3 2 5 6 1 0 0 0 0 2 1 4 24 MEAN 3 3 4 4 2 0 0 0 0 2 3 3 24 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 34 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. HIGHEST AND LOWEST LIMITS FOR 40 YEARS DURING 1964-2003 ELE- JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MENT --------------------------------------------------------------------------------------------- NO. HIG. DRY 03 6.8 7.0 11.2 16.0 20.0 25.2 27.4 29.0 24.0 22.0 14.0 10.2 1 YEAR - DAY 1979- 5 1973-15 1969-31 1970-19 1974-21 1973-29 1998-14 1993-15 1995- 1 1964- 1 1995- 2 1998-15 LOW. DRY 03 -28.0 -23.8 -17.0 -9.2 0.4 8.0 12.0 6.0 3.0 -5.6 -10.4 -22.2 2 YEAR - DAY 1983-28 1989- 7 2003- 1 1983- 2 1984- 2 1973- 6 1974-22 1994-31 1981-26 1975-23 1986-18 1982- 8 HIG. WET 03 3.8 4.0 9.4 12.0 15.4 17.4 21.0 28.0 15.6 11.0 8.2 6.0 3 YEAR - DAY 1979- 5 1965-14 1984-11 1980-23 2002-20 1984-15 1976-18 1993-15 1975- 3 1964- 2 1995-28 1980- 6 LOW. WET 03 -28.0 -24.0 -18.0 -12.4 -2.4 2.6 4.8 3.0 -0.8 -7.8 -13.4 -22.2 4 YEAR - DAY 1983-28 1989- 7 2003- 1 1983- 2 1984- 2 1967- 6 1988- 1 1988-16 1981-26 1984-21 1986-18 1964-21 HIG. DRY 09 13.4 14.0 18.0 23.0 29.0 35.0 36.0 36.2 32.6 31.0 19.4 19.4 5 YEAR - DAY 2003-12 1977-28 1995-14 1998-15 1999-31 2001-29 1988-24 1991- 3 1991- 1 1964- 1 1971- 2 1981- 7 LOW. DRY 09 -13.0 -12.0 -8.2 -2.0 8.0 13.0 20.6 15.0 10.0 4.4 -4.6 -17.0 6 YEAR - DAY 1964- 5 1972-11 1976- 2 1967- 1 1979- 9 1995- 9 1992-22 1988-29 1994-27 1976-31 1986-28 1964-20 HIG. WET 09 12.0 8.8 13.0 20.0 20.8 25.8 27.2 34.0 26.6 19.0 15.0 11.0 7 YEAR - DAY 1987-17 1973-19 1995-16 1995-29 1985-30 1984-11 1983-13 1993-11 1985-17 1972- 1 1995- 1 1980- 5 LOW. WET 09 -15.0 -14.0 -11.4 -3.2 3.6 6.4 11.4 8.0 7.0 2.6 -6.2 -19.0 8 YEAR - DAY 1964- 5 1972-11 1976- 2 1967- 1 1964- 1 1967- 6 2000-26 1994-31 1994-27 1976-31 1986-30 1964-20 HIG. DRY 15 9.2 10.4 15.0 20.0 31.0 33.2 35.0 34.2 30.0 28.0 17.0 14.8 9 YEAR - DAY 1971-11 1973-19 1977-21 2002-28 1987-22 1983-21 1989-15 1991-10 1995- 6 1964- 2 1994- 4 1980- 6 LOW. DRY 15 -21.2 -19.0 -11.4 -3.2 4.0 7.4 15.8 13.0 8.0 2.0 -6.8 -19.0 10 YEAR - DAY 1983-27 1972- 4 1997- 8 1967- 1 1993- 8 1967- 6 1985-22 1969-28 1994-27 1966-28 1986-28 1964-20 HIG. WET 15 6.0 5.8 9.8 15.0 24.5 23.2 26.4 28.0 22.0 17.0 12.0 9.0 11 YEAR - DAY 1971-11 1965-14 1974-19 1995-13 2002-29 1984-18 1976-16 1993-26 1973- 1 1989- 8 1995- 1 1980- 6 LOW. WET 15 -21.2 -20.2 -14.0 -5.4 2.0 3.2 9.6 6.0 5.0 0.0 -8.2 -19.2 12 YEAR - DAY 1983-27 1972- 4 1976- 2 1967- 1 1964- 1 1967- 6 2002- 2 1994-28 1994-16 1984-21 1986-28 1964-20 HIG. MIN. 5.0 5.0 10.5 14.0 17.4 22.6 24.0 27.0 20.0 20.0 9.0 10.0 13 YEAR - DAY 1979- 5 1978- 2 1984-11 1980-23 2002-20 1999-22 1998-14 1993-15 1999- 3 1964- 1 1988- 9 1998-15 LOW. MIN. -30.0 -34.5 -23.0 -16.5 -5.0 1.5 5.0 4.0 -0.5 -10.0 -13.0 -28.0 14 YEAR - DAY 1964-20 1974- 5 1976- 2 1967- 2 1997- 6 1967- 6 1965- 7 1994-31 1966-21 1975-28 1973- 8 1972-26 HIG. MAX. 15.0 16.0 35.0 25.0 31.0 37.0 39.0 38.0 35.0 31.0 24.5 20.5 15 YEAR - DAY 1987-31 1987- 2 1982-29 1991-26 1987-22 2001-29 2003-16 1991- 3 1991- 1 1964- 1 2001- 3 1998-10 LOW. MAX. -12.0 -10.0 -4.0 -0.5 9.5 15.0 22.5 18.0 13.0 6.5 -1.6 -14.0 16 YEAR - DAY 1964-20 1968- 5 1976- 2 1967- 1 1979- 9 1995- 9 1974-21 1969-28 1994-27 1976-31 1986-28 1994- 6 HIG. PPTN 42.8 51.0 46.7 49.0 45.4 18.0 7.0 7.0 9.0 50.0 80.0 60.2 17 YEAR - DAY 1969-23 1966- 2 1998-29 1992-27 1986- 4 1995- 8 1987-25 1992-28 1994-25 1965-29 1972- 5 1985-18 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 35 STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. HIGHEST LIMITS OF ABSOLUTE DIFFERENCES FOR 40 YEARS DURING 1964-2003 ELE- JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MENT --------------------------------------------------------------------------------------------- NO. DRY 09 - DRY 03 22.2 21.0 23.2 19.0 19.0 17.6 17.8 19.6 20.8 21.0 21.0 20.4 18 YEAR - DAY 1983-28 1989- 9 1973-30 1984- 5 1993- 2 1974- 5 1989- 9 2000-31 1992- 1 1980-23 1973-10 2000-17 DRY 15 - DRY 09 15.6 13.4 10.8 12.8 11.2 14.0 15.0 13.2 12.8 16.6 13.8 14.6 19 YEAR - DAY 1970-12 1989-16 2003-17 1998-12 1968- 9 1993-19 1985-22 1992-11 1985-17 1966- 5 1987-22 1982-11 DRY 15 - DRY 03 20.2 16.4 21.0 16.8 16.0 19.0 15.0 19.6 17.8 21.2 18.0 17.6 20 YEAR - DAY 2001-28 2000- 4 1973-30 1979-17 1987-22 1983-21 1975-20 1991-26 1981-17 1975-26 1992-22 2000-17 WET 09 - WET 03 19.6 19.0 18.2 15.6 14.2 15.6 14.0 18.4 21.8 17.4 18.0 19.6 21 YEAR - DAY 1983-28 2000-10 1973-30 1984- 5 1999-24 2002- 4 1975-15 1986-14 1985-17 1983-21 1973-10 2000-17 WET 15 - WET 09 16.6 13.6 8.0 11.0 14.9 11.6 12.2 13.0 15.2 10.2 9.0 12.6 22 YEAR - DAY 1970-12 2000- 3 1967- 9 1995-29 2002-29 2002- 4 1985-22 1993-25 1985-17 1989- 8 1987-22 1982-12 WET 15 - WET 03 19.4 16.6 16.8 14.4 20.9 12.8 13.4 16.0 16.0 19.8 14.2 16.0 23 YEAR - DAY 2001-28 2000- 4 1973-30 1983- 2 2002-29 1998-28 1989-19 1993-30 1973-18 1975-26 1973-10 2000-17 DAY BY DAY DRY 03 20.4 17.8 15.4 14.8 10.0 10.8 9.0 10.4 14.0 15.0 13.4 20.0 24 YEAR - DAY 2001-30 1969-17 1997- 8 1973- 1 1981-29 1999- 6 1993- 1 1997-21 1997-20 1985-20 1995-28 1994- 7 DAY BY DAY WET 03 20.0 18.0 15.6 14.0 10.8 7.6 11.4 9.2 9.8 11.4 13.2 18.0 25 YEAR - DAY 2001-30 1969-17 1997- 8 1983- 3 2002-21 1992- 4 1989- 2 1988-17 1988-21 1970-18 1995-28 1994- 7 DAY BY DAY DRY 09 10.6 10.0 11.0 10.0 13.0 11.0 11.8 12.4 16.0 11.2 14.4 19.0 26 YEAR - DAY 1973-27 1995- 4 1966-19 1992-22 1993- 2 1967- 7 1989-15 1988-29 1992- 2 1985- 9 1986-29 1994- 7 DAY BY DAY WET 09 11.6 10.2 11.0 9.0 11.0 11.0 9.0 15.0 14.8 5.6 11.0 18.0 27 YEAR - DAY 1973-27 1972-11 1995-17 1995-29 1999-24 2002- 4 1974- 9 1993-25 1985-17 1996-15 1986-30 1994- 7 DAY BY DAY DRY 15 22.0 16.8 11.2 11.0 13.4 13.6 14.2 8.2 11.0 11.2 13.0 15.0 28 YEAR - DAY 1996-12 2000- 4 1971-25 1964- 9 1987-22 1993-12 1985-22 1996-28 1989-13 1989- 8 1986-29 1994- 4 DAY BY DAY WET 15 22.0 16.4 10.2 8.0 15.9 11.0 14.2 9.0 12.2 13.0 11.0 15.0 29 YEAR - DAY 1996-12 2000- 4 1997- 8 1967- 3 2002-29 1995-19 1989-19 1993-14 1986-13 1989- 8 1986-29 1994- 4 DAY BY DAY MIN. 27.0 20.5 20.0 14.0 12.4 11.4 11.6 8.8 11.0 17.0 13.0 20.0 30 YEAR - DAY 2001-30 1969-17 1997- 8 1967- 3 2002-20 1999-12 2003-21 1996-16 1997- 5 1964- 1 1978- 5 1994- 7 DAY BY DAY MAX. 11.5 9.0 31.0 10.0 12.5 8.5 7.5 9.0 11.5 12.0 14.6 18.0 31 YEAR - DAY 1973-27 1974- 5 1982-29 1988- 9 1993- 2 1967- 7 1974- 9 1985-23 1969-12 1985- 9 1986-29 1994- 7 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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.-11.9 -1.5 3.9 6.0 12.8 17.8 21.8 20.5 16.7 17.5 1.7 -6.6 8.2 AVERAGE OF MINIMUM TEMPERATURE IN C. -19.0 -6.8 -2.2 -0.8 3.5 7.3 10.0 8.7 5.6 12.2 -5.8 -14.0 -0.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. -4.8 3.7 10.0 12.9 22.1 28.4 33.5 32.3 27.7 22.9 9.3 0.7 16.6 DIFFERENCE BETWEEN AVERAGE MAXIMUM 14.2 10.5 12.2 13.7 18.6 21.1 23.5 23.6 22.1 10.7 15.1 14.7 16.7 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 0.68 2.54 3.66 3.78 3.95 4.92 5.49 5.57 5.15 3.97 2.75 1.60 3.67 MEAN OF MIXING RATIO AT 09 GMT. 1.50 3.62 3.89 3.64 4.20 5.28 5.42 5.45 7.74 4.33 2.95 2.37 4.20 MEAN OF MIXING RATIO AT 15 GMT. 1.21 3.09 3.53 3.25 4.00 3.84 4.48 4.73 6.14 3.73 2.54 1.96 3.54 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -30.0 -19.5 -5.5 -5.5 -1.0 4.5 8.5 6.0 2.0 5.4 -12.5 -27.0 -30.0 DAY 20 8 9 9 1 9 3 19 20 31 28 20 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 5.0 8.5 16.0 19.5 26.0 30.5 36.0 35.0 32.0 31.0 16.0 8.5 36.0 DAY 31 22 30 28 21 26 5 6 2 1 17 6 24 HOUR MAXIMUM PRECIPITATION IN MM. 7.0 7.2 17.0 17.0 1.0 0.0 0.0 0.0 0.0 0.0 14.0 15.2 17.0 DAY 19 6 12 9 11 ** ** ** ** ** 22 12 MONTHLY TOTAL PRECIPITATION IN MM. 7.0 24.1 59.0 39.0 1.0 0.0 0.0 0.0 0.0 0.0 36.0 32.4 198.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 45.4 20.2 0.0 34.5 NO. OF DAYS WITH PRECIPITATION. 1 5 6 3 1 0 0 0 0 0 5 4 25 NO. OF DAYS PRECIPITATION EQUAL 1 5 6 3 1 0 0 0 0 0 5 4 25 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 4 2 0 0 0 0 0 0 2 2 10 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 38 65 66 59 34 31 25 31 41 32 64 50 45 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 44 60 44 36 22 19 14 15 29 21 37 48 32 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 49 61 46 37 25 16 14 16 27 23 38 53 34 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 31 24 5 2 0 0 0 0 0 0 24 31 117 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 30 1 0 0 0 0 0 0 0 0 1 15 47 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 7 31 29 6 3 0 0 76 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 29 31 21 3 0 0 0 0 0 30 31 176 DATE OF START AND END FREEZING START = 1 NOV. END = 6 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -6.6 -2.4 3.0 5.6 14.3 17.5 20.1 19.9 15.6 9.5 5.0 -0.9 8.4 AVERAGE OF MINIMUM TEMPERATURE IN C. -12.9 -8.9 -4.2 -1.9 5.1 6.8 9.0 9.6 5.6 1.4 -1.8 -9.2 -0.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. -0.3 4.1 10.2 13.0 23.5 28.2 31.1 30.1 25.6 17.5 11.9 7.5 16.9 DIFFERENCE BETWEEN AVERAGE MAXIMUM 12.6 13.0 14.4 14.9 18.4 21.5 22.1 20.5 20.0 16.1 13.7 16.7 17.0 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 1.39 2.21 3.15 3.63 4.54 4.25 5.24 6.05 4.75 4.38 3.49 2.07 3.76 MEAN OF MIXING RATIO AT 09 GMT. 2.76 3.58 3.92 3.65 4.71 4.56 4.97 4.90 5.16 5.12 4.45 3.15 4.24 MEAN OF MIXING RATIO AT 15 GMT. 1.99 3.08 3.44 3.17 4.29 3.62 4.56 4.63 4.48 4.60 4.07 2.66 3.71 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -24.0 -20.0 -10.5 -8.0 -2.5 5.0 5.0 8.0 2.0 -3.0 -5.0 -15.5 -24.0 DAY 6 5 15 5 4 17 7 28 22 25 14 22 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 5.0 12.5 17.0 20.0 27.5 30.0 34.5 32.5 30.0 21.0 14.5 13.0 34.5 DAY 27 28 9 24 22 3 25 1 1 13 4 5 24 HOUR MAXIMUM PRECIPITATION IN MM. 14.6 12.0 44.2 16.0 10.4 0.0 0.0 0.0 3.0 50.0 27.0 18.0 50.0 DAY 20 14 3 18 2 ** ** ** 29 29 18 28 MONTHLY TOTAL PRECIPITATION IN MM. 43.4 12.0 91.2 30.0 10.4 0.0 0.0 0.0 3.0 135.8 85.0 44.4 455.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 32.2 8.9 0.7 58.3 NO. OF DAYS WITH PRECIPITATION. 7 1 3 3 1 0 0 0 1 5 4 5 30 NO. OF DAYS PRECIPITATION EQUAL 7 1 3 3 1 0 0 0 1 5 4 5 30 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 1 3 1 1 0 0 0 0 5 4 1 18 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 46 53 62 59 35 25 26 32 34 47 52 47 43 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 62 58 44 35 24 17 15 16 23 35 44 50 35 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 55 58 47 37 25 15 16 17 24 38 49 49 36 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 31 23 17 6 0 0 0 0 0 0 10 31 118 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 18 6 0 0 0 0 0 0 0 0 0 0 24 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 7 21 18 1 0 0 0 47 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 30 23 2 0 0 0 0 9 25 31 178 DATE OF START AND END FREEZING START = 23 OCT. END = 5 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. 1.0 -1.3 2.7 7.2 12.8 19.6 22.7 20.7 14.8 ***** 6.1 2.6 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -6.6 -8.8 -5.0 -0.8 3.5 8.4 11.6 9.5 3.7 4.8 -1.8 -4.2 1.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 8.7 6.2 10.4 15.1 22.1 30.8 33.7 31.8 25.9 ***** 13.9 9.4 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 15.3 15.0 15.4 15.9 18.6 22.4 22.1 22.3 22.2 ***** 15.6 13.6 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.79 2.21 3.05 3.55 4.35 6.71 8.87 8.61 5.55 5.03 2.96 2.56 4.69 MEAN OF MIXING RATIO AT 09 GMT. 3.91 3.60 3.97 4.12 4.79 7.45 9.40 6.47 5.17 4.89 3.68 3.62 5.09 MEAN OF MIXING RATIO AT 15 GMT. 3.38 3.15 3.49 3.58 4.23 6.05 8.04 5.57 4.79 4.96 3.36 2.96 4.46 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -9.0 -11.0 -11.0 -5.5 -1.0 5.5 10.5 6.5 -0.5 3.0 -9.5 -12.0 -12.0 DAY 15 16 2 1 6 16 5 27 21 28 26 23 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 13.5 11.0 15.5 19.5 28.5 33.5 36.5 34.0 31.0 ***** 17.0 15.5 ****** DAY 4 25 10 21 23 13 11 3 1 ** 29 10 24 HOUR MAXIMUM PRECIPITATION IN MM. 37.0 51.0 14.0 18.0 21.0 0.0 0.0 0.0 0.0 38.0 0.0 7.5 51.0 DAY 30 2 18 19 6 ** ** ** ** 25 ** 26 MONTHLY TOTAL PRECIPITATION IN MM. 98.0 126.0 61.2 43.2 63.0 0.0 0.0 0.0 0.0 101.0 0.0 14.5 506.9 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 56.3 21.0 0.0 22.8 NO. OF DAYS WITH PRECIPITATION. 5 7 6 4 5 0 0 0 0 7 0 3 37 NO. OF DAYS PRECIPITATION EQUAL 5 7 6 4 5 0 0 0 0 7 0 3 37 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 4 3 2 4 0 0 0 0 4 0 0 20 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 63 64 59 47 38 40 44 50 47 42 55 47 50 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 54 55 48 35 26 25 27 19 22 32 31 47 35 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 59 64 49 37 28 24 27 19 24 65 37 48 40 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 28 28 20 3 0 0 0 0 0 0 8 16 103 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 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 21 31 28 2 *** 0 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 *** 0 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 *** 0 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. 31 28 30 20 3 0 0 0 2 0 22 26 162 DATE OF START AND END FREEZING START = 17 SEP. END = 7 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -2.2 -4.3 0.9 5.7 12.0 16.4 21.8 21.5 17.2 11.0 6.2 -0.1 8.8 AVERAGE OF MINIMUM TEMPERATURE IN C. -9.5 -10.0 -5.6 -1.1 4.3 6.5 10.0 11.8 8.6 3.1 0.0 -6.5 1.0 AVERAGE OF MAXIMUM TEMPERATURE IN C. 5.0 1.5 7.4 12.5 19.8 26.3 33.6 31.3 25.7 18.9 12.4 6.2 16.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 14.5 11.5 13.0 13.6 15.5 19.8 23.6 19.5 17.1 15.8 12.4 12.7 15.7 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.00 1.71 2.65 3.37 5.23 4.69 5.03 4.73 5.03 4.14 3.41 1.47 3.62 MEAN OF MIXING RATIO AT 09 GMT. 3.03 2.82 4.38 4.11 5.04 5.11 5.55 5.31 5.95 4.62 4.12 2.82 4.40 MEAN OF MIXING RATIO AT 15 GMT. 2.48 1.96 2.85 3.78 4.82 4.75 5.42 4.84 4.78 4.69 4.08 1.85 3.86 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -24.0 -20.0 -15.0 -16.5 -1.0 1.5 6.5 9.0 5.5 -2.0 -10.0 -18.0 -24.0 DAY 23 28 1 2 1 6 1 1 30 17 30 25 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 11.5 5.5 13.6 17.5 24.5 33.0 36.5 34.5 31.0 24.0 19.5 12.5 36.5 DAY 17 10 17 24 25 27 21 18 2 2 6 17 24 HOUR MAXIMUM PRECIPITATION IN MM. 5.0 5.0 20.8 18.2 11.0 0.0 0.0 0.0 0.0 6.0 17.0 1.7 20.8 DAY 22 12 8 5 18 ** ** ** ** 22 24 23 MONTHLY TOTAL PRECIPITATION IN MM. 18.9 34.2 53.8 42.3 16.5 0.0 0.0 0.0 0.0 9.7 41.1 4.1 220.6 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 48.5 26.7 0.0 24.9 NO. OF DAYS WITH PRECIPITATION. 7 13 7 6 4 0 0 0 0 3 4 3 47 NO. OF DAYS PRECIPITATION EQUAL 7 12 6 5 4 0 0 0 0 3 4 3 44 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 2 2 1 0 0 0 0 0 2 0 7 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 50 45 65 51 51 38 24 27 42 55 52 32 44 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 47 54 57 39 29 20 14 15 24 31 39 39 34 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 47 44 46 45 35 25 18 17 27 43 49 34 36 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 27 27 20 2 0 0 0 0 0 0 2 20 98 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 2 7 1 1 0 0 0 0 0 0 0 2 13 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 4 28 28 2 0 0 0 62 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 28 31 20 1 0 0 0 0 2 12 29 154 DATE OF START AND END FREEZING START = 16 OCT. END = 1 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -2.6 -4.0 3.8 7.0 12.6 17.6 21.4 21.6 16.3 11.5 6.2 2.2 9.5 AVERAGE OF MINIMUM TEMPERATURE IN C. -9.0 -10.4 -2.6 0.7 5.5 9.1 11.7 12.5 6.6 2.9 0.4 -2.5 2.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.9 2.4 10.1 13.4 19.7 26.0 31.1 30.8 25.9 20.0 12.0 7.0 16.9 DIFFERENCE BETWEEN AVERAGE MAXIMUM 12.9 12.8 12.7 12.7 14.2 16.9 19.4 18.3 19.3 17.1 11.6 9.5 14.8 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 1.53 ***** 2.61 4.44 5.75 5.62 5.07 4.98 3.83 4.32 4.42 3.22 ***** MEAN OF MIXING RATIO AT 09 GMT. 2.24 2.67 3.75 4.51 5.27 5.39 5.86 5.88 5.22 5.53 4.63 4.01 4.58 MEAN OF MIXING RATIO AT 15 GMT. 1.75 1.84 2.76 4.49 5.59 4.79 5.51 4.64 4.39 4.87 4.52 3.74 4.08 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -19.0 -28.0 -12.0 -2.5 0.5 7.0 8.5 9.0 4.0 -1.0 -3.5 -9.0 -28.0 DAY 19 5 24 4 1 10 13 31 20 28 19 21 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 9.0 11.3 15.0 20.5 24.0 30.5 32.5 32.5 31.0 25.0 15.5 10.5 32.5 DAY 14 29 13 19 22 29 8 16 4 1 13 3 24 HOUR MAXIMUM PRECIPITATION IN MM. 20.0 15.7 25.0 16.2 19.5 0.0 0.0 0.0 0.0 13.0 10.0 14.0 25.0 DAY 7 21 29 2 14 ** ** ** ** 31 16 27 MONTHLY TOTAL PRECIPITATION IN MM. 33.8 33.8 60.8 81.3 73.5 0.0 0.0 0.0 0.0 22.5 38.2 25.5 369.4 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 34.8 41.9 0.0 23.3 NO. OF DAYS WITH PRECIPITATION. 7 9 6 11 9 0 0 0 0 2 7 5 56 NO. OF DAYS PRECIPITATION EQUAL 5 6 5 11 9 0 0 0 0 2 7 5 50 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 2 3 2 0 0 0 0 1 1 1 12 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 33 *** 46 67 57 40 29 30 38 55 70 63 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 35 42 41 42 30 21 18 18 22 34 47 56 34 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 37 36 38 52 44 24 22 17 22 37 54 63 37 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 23 23 11 0 0 0 0 0 0 0 0 9 66 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 6 8 1 0 0 0 0 0 0 0 0 0 15 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 2 28 24 2 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 29 21 19 0 0 0 0 0 3 10 25 138 DATE OF START AND END FREEZING START = 26 OCT. END = 30 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -3.9 -4.0 7.0 8.2 14.3 19.2 22.4 21.1 15.9 13.5 4.2 3.1 10.1 AVERAGE OF MINIMUM TEMPERATURE IN C. -10.0 -10.4 2.4 2.2 7.5 11.0 13.7 13.3 7.6 6.8 -2.4 -2.5 3.3 AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.1 2.4 11.6 14.2 21.1 27.3 31.2 28.9 24.2 20.2 10.8 8.6 16.9 DIFFERENCE BETWEEN AVERAGE MAXIMUM 12.1 12.8 9.2 12.0 13.6 16.3 17.5 15.6 16.6 13.4 13.1 11.1 13.6 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 1.93 2.71 4.49 4.81 5.82 5.28 6.68 5.85 4.89 4.80 3.56 3.30 4.51 MEAN OF MIXING RATIO AT 09 GMT. 2.71 2.84 5.06 4.87 6.03 5.67 6.67 6.02 6.63 5.33 3.89 3.51 4.94 MEAN OF MIXING RATIO AT 15 GMT. 2.47 3.19 4.78 4.75 5.12 5.35 5.73 5.51 5.45 4.99 3.49 3.46 4.52 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -24.0 -25.5 -1.5 -6.0 3.5 6.0 9.0 7.0 2.5 1.5 -8.5 -11.0 -25.5 DAY 31 16 24 14 7 2 8 29 13 31 17 29 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 6.0 10.5 17.5 21.0 25.5 31.5 34.5 33.5 28.0 26.0 14.0 16.0 34.5 DAY 18 28 30 25 14 29 25 4 6 5 7 13 24 HOUR MAXIMUM PRECIPITATION IN MM. 42.8 11.0 19.8 12.4 18.5 0.0 0.0 6.8 0.0 12.8 12.0 17.0 42.8 DAY 23 21 11 11 7 ** ** 28 ** 30 2 27 MONTHLY TOTAL PRECIPITATION IN MM. 170.7 26.6 77.6 56.0 41.5 0.0 0.0 6.8 0.0 31.0 17.0 50.4 477.6 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 57.6 20.4 1.4 20.6 NO. OF DAYS WITH PRECIPITATION. 12 5 9 10 4 0 0 1 0 4 2 7 54 NO. OF DAYS PRECIPITATION EQUAL 12 5 9 10 4 0 0 1 0 4 2 7 54 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 7 1 3 3 2 0 0 0 0 1 1 1 19 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 52 60 60 66 51 33 37 36 47 50 68 62 52 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 51 50 52 41 33 21 20 22 30 32 42 46 37 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 53 63 55 49 35 25 20 24 30 37 48 54 41 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 30 20 0 1 0 0 0 0 0 0 12 12 75 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 6 8 0 0 0 0 0 0 0 0 0 0 14 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 3 21 15 0 0 0 0 39 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 28 4 8 0 0 0 0 0 0 22 23 116 DATE OF START AND END FREEZING START = 4 NOV. END = 22 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -2.0 2.6 3.9 11.0 15.0 ***** 22.8 22.6 17.6 11.7 8.0 -2.1 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -7.5 -3.0 -2.3 4.3 7.3 ***** 14.6 13.4 8.1 2.7 1.6 -8.8 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.4 8.1 10.1 17.6 22.6 ***** 30.9 31.9 27.0 20.7 14.3 4.5 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.9 11.1 12.4 13.3 15.3 ***** 16.3 18.5 18.9 18.0 12.7 13.3 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.59 3.05 3.65 4.21 4.57 ***** 5.57 4.76 3.46 2.84 3.39 2.15 ***** MEAN OF MIXING RATIO AT 09 GMT. 3.62 4.03 3.81 4.20 3.75 ***** 5.57 5.01 4.61 3.18 3.71 3.26 ***** MEAN OF MIXING RATIO AT 15 GMT. 2.76 3.23 3.95 3.97 3.75 ***** 4.57 4.00 3.26 2.78 3.60 2.80 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -24.0 -9.0 -6.5 -1.0 2.5 ***** 10.0 8.5 4.5 -3.0 -3.5 -21.0 ****** DAY 29 2 6 10 7 ** 26 25 20 25 26 16 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 8.5 11.0 19.0 23.5 28.5 ***** 34.5 34.5 32.0 27.0 19.5 14.0 ****** DAY 5 15 28 15 16 ** 31 9 2 7 2 4 24 HOUR MAXIMUM PRECIPITATION IN MM. 8.0 18.2 8.0 30.0 12.2 ***** 0.0 0.0 0.0 2.8 12.0 22.0 ****** DAY 27 6 11 23 4 ** ** ** ** 14 28 12 MONTHLY TOTAL PRECIPITATION IN MM. 28.0 28.0 20.6 77.0 15.4 ***** 0.0 0.0 0.0 2.8 12.0 43.2 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 33.7 40.7 0.0 25.6 NO. OF DAYS WITH PRECIPITATION. 7 5 5 4 2 *** 0 0 0 1 1 3 *** NO. OF DAYS PRECIPITATION EQUAL 6 4 5 4 2 *** 0 0 0 1 1 3 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 0 3 1 *** 0 0 0 0 1 2 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 66 62 73 52 42 *** 31 28 32 37 49 50 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 63 52 45 31 21 *** 18 15 18 20 32 53 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 59 49 54 35 25 *** 17 14 16 21 38 57 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 21 12 9 0 0 *** 0 0 0 0 0 24 *** 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 3 0 0 0 0 *** 0 0 0 0 0 4 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 *** 20 29 9 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 22 25 2 0 *** 0 0 0 6 5 29 *** DATE OF START AND END FREEZING START = 11 OCT. END = 25 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -1.2 -1.7 5.0 6.8 15.4 19.6 24.0 22.5 17.1 11.2 6.3 -0.2 10.4 AVERAGE OF MINIMUM TEMPERATURE IN C. -7.7 -7.0 -0.6 1.0 8.7 10.9 17.1 13.9 8.5 2.6 0.2 -6.2 3.4 AVERAGE OF MAXIMUM TEMPERATURE IN C. 5.2 3.6 10.6 12.7 22.1 28.3 30.9 31.1 25.7 19.9 12.4 5.7 17.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 12.9 10.6 11.2 11.7 13.4 17.4 13.8 17.2 17.2 17.3 12.2 11.9 13.9 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.34 2.94 3.66 4.36 5.72 5.36 6.28 6.28 4.82 3.24 3.76 2.41 4.26 MEAN OF MIXING RATIO AT 09 GMT. 3.52 3.57 4.22 4.74 6.04 5.80 7.26 7.15 5.83 3.66 5.03 3.13 5.00 MEAN OF MIXING RATIO AT 15 GMT. 3.02 3.26 4.21 4.73 5.39 5.09 6.14 6.21 5.28 3.44 4.74 3.12 4.55 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -16.0 -18.5 -11.5 -2.5 4.5 5.0 12.0 10.0 2.5 -2.0 -7.0 -21.0 -21.0 DAY 31 3 16 2 4 5 26 3 21 10 20 21 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 12.5 9.5 15.0 19.5 25.0 32.5 34.0 33.0 31.5 23.5 20.5 13.5 34.0 DAY 8 21 18 29 15 26 13 11 4 15 2 12 24 HOUR MAXIMUM PRECIPITATION IN MM. 7.4 4.8 13.2 35.0 16.2 0.0 0.0 4.2 0.0 0.0 14.2 33.0 35.0 DAY 29 13 15 13 7 ** ** 1 ** ** 10 10 MONTHLY TOTAL PRECIPITATION IN MM. 15.2 16.2 51.6 116.6 26.2 0.0 0.0 8.0 0.0 0.0 50.0 55.4 339.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 24.5 42.1 2.4 31.1 NO. OF DAYS WITH PRECIPITATION. 4 6 8 9 4 0 0 2 0 0 6 6 45 NO. OF DAYS PRECIPITATION EQUAL 4 6 8 9 4 0 0 2 0 0 6 6 45 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 1 4 1 0 0 0 0 0 2 1 9 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 66 63 62 66 48 36 33 39 42 42 55 51 50 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 54 60 45 45 32 21 23 22 24 23 50 46 37 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 59 62 57 53 34 22 22 22 25 27 56 55 41 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 27 18 9 0 0 0 0 0 0 0 5 18 77 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 4 0 0 0 0 0 4 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 2 3 0 0 0 0 0 0 0 0 0 1 6 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 10 23 27 8 0 0 0 68 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 28 14 9 0 0 0 0 0 8 14 29 133 DATE OF START AND END FREEZING START = 10 OCT. END = 21 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -4.2 -8.3 1.2 9.3 11.1 19.0 22.7 20.0 17.5 13.0 6.7 -4.9 8.6 AVERAGE OF MINIMUM TEMPERATURE IN C. -9.8 -16.0 -4.1 2.9 5.1 11.2 14.0 12.1 8.3 4.2 -0.1 -11.0 1.4 AVERAGE OF MAXIMUM TEMPERATURE IN C. 1.4 -0.7 6.5 15.7 17.1 26.7 31.4 27.9 26.6 21.8 13.5 1.2 15.8 DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.2 15.3 10.6 12.8 12.0 15.5 17.4 15.8 18.3 17.6 13.6 12.2 14.4 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 1.83 1.16 3.48 4.94 5.52 6.10 6.26 7.49 6.16 4.53 3.82 1.46 4.40 MEAN OF MIXING RATIO AT 09 GMT. 3.03 2.83 4.68 5.42 5.46 8.72 8.14 10.14 10.56 7.58 4.93 3.53 6.25 MEAN OF MIXING RATIO AT 15 GMT. 2.36 1.81 4.04 5.23 5.40 6.76 6.32 8.32 8.97 6.66 5.02 2.60 5.29 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -17.0 -26.0 -20.0 -2.5 0.5 7.5 10.5 8.5 4.5 0.5 -4.5 -28.0 -28.0 DAY 2 4 11 7 10 15 1 28 12 31 21 26 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 5.0 8.5 13.5 23.5 24.0 31.0 34.0 31.0 30.0 26.5 20.0 7.0 34.0 DAY 12 17 30 10 26 19 22 1 3 1 1 10 24 HOUR MAXIMUM PRECIPITATION IN MM. 5.0 10.0 33.0 13.2 16.0 0.0 0.0 0.0 0.0 12.0 80.0 10.6 80.0 DAY 22 9 22 11 29 ** ** ** ** 30 5 22 MONTHLY TOTAL PRECIPITATION IN MM. 16.6 17.0 115.0 43.2 67.6 0.0 0.0 0.0 0.0 12.0 95.0 36.2 402.6 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 36.9 27.5 0.0 35.6 NO. OF DAYS WITH PRECIPITATION. 5 3 12 9 11 0 0 0 0 1 2 9 52 NO. OF DAYS PRECIPITATION EQUAL 5 3 12 9 11 0 0 0 0 1 2 9 52 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 4 1 3 0 0 0 0 1 2 1 13 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 49 48 73 69 66 44 36 50 55 59 65 47 55 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 62 62 68 44 39 35 25 37 41 39 46 69 47 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 56 56 65 52 46 32 22 36 42 41 55 58 47 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 31 29 12 0 0 0 0 0 0 0 3 28 103 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 9 17 0 0 0 0 0 0 0 0 0 10 36 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 2 26 6 1 0 0 0 35 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 29 31 3 0 0 0 0 0 0 17 31 142 DATE OF START AND END FREEZING START = 2 NOV. END = 7 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -7.5 0.8 2.7 10.0 14.5 20.7 21.4 23.4 17.3 12.7 5.4 -0.3 10.1 AVERAGE OF MINIMUM TEMPERATURE IN C. -15.5 -6.6 -5.5 3.6 6.4 11.2 12.4 16.2 7.6 3.7 -1.7 -7.3 2.0 AVERAGE OF MAXIMUM TEMPERATURE IN C. 0.5 8.2 10.9 16.3 22.5 30.1 30.5 30.6 27.0 21.6 12.4 6.8 18.1 DIFFERENCE BETWEEN AVERAGE MAXIMUM 16.0 14.8 16.4 12.7 16.1 18.9 18.1 14.4 19.4 17.9 14.1 14.1 16.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** 3.17 3.33 4.61 5.30 6.48 6.30 12.25 6.32 4.46 3.21 2.43 ***** MEAN OF MIXING RATIO AT 09 GMT. 3.03 4.69 4.37 4.85 7.96 11.35 11.06 21.97 16.29 8.05 4.83 4.28 8.56 MEAN OF MIXING RATIO AT 15 GMT. 2.19 4.12 4.20 5.11 6.43 8.41 8.47 19.07 11.98 5.89 4.37 3.84 7.01 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -25.5 -18.5 -19.0 -5.0 1.5 4.5 8.5 10.5 3.5 0.5 -13.0 -19.0 -25.5 DAY 19 3 10 3 7 6 8 29 22 25 8 31 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 7.0 14.5 17.5 21.5 26.5 35.5 35.5 35.0 31.5 26.0 17.5 12.5 35.5 DAY 27 19 2 26 29 24 24 3 1 7 13 2 24 HOUR MAXIMUM PRECIPITATION IN MM. 5.2 11.0 44.0 20.0 4.8 0.0 3.8 0.0 0.0 0.0 17.0 6.4 44.0 DAY 29 22 3 8 10 ** 21 ** ** ** 23 31 MONTHLY TOTAL PRECIPITATION IN MM. 25.4 22.0 67.2 41.4 4.8 0.0 6.2 0.0 0.0 0.0 20.0 16.8 203.8 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 56.2 22.7 3.0 18.1 NO. OF DAYS WITH PRECIPITATION. 8 3 5 4 1 0 2 0 0 0 2 7 32 NO. OF DAYS PRECIPITATION EQUAL 8 3 5 4 1 0 2 0 0 0 2 6 31 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 2 2 0 0 0 0 0 0 1 0 6 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** 61 63 60 52 43 36 66 57 59 47 52 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 60 59 48 36 39 35 34 65 59 42 47 59 49 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 48 61 55 48 39 32 32 68 52 38 51 63 49 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 31 24 19 2 0 0 0 0 0 0 10 21 107 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 9 0 0 0 0 0 0 0 0 0 0 2 11 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 14 15 17 3 0 0 0 49 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 28 29 2 0 0 0 0 0 0 15 28 133 DATE OF START AND END FREEZING START = 6 NOV. END = 10 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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.-10.1 -9.1 3.4 8.7 15.9 19.7 21.4 21.7 ***** 10.4 ***** -3.1 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -19.1 -18.7 -2.7 3.1 9.6 10.6 13.4 13.7 ***** 1.5 ***** -12.5 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. -0.8 0.4 9.4 14.3 22.2 28.8 29.4 29.7 ***** 19.4 ***** 6.3 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 18.3 19.1 12.1 11.1 12.6 18.2 16.0 16.0 ***** 17.9 ***** 18.8 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** 4.00 4.57 6.30 6.79 9.09 9.09 ***** 4.97 ***** 1.58 ***** MEAN OF MIXING RATIO AT 09 GMT. 1.46 2.16 5.35 7.13 10.60 10.86 12.37 17.80 ***** 6.56 ***** 4.03 ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** 4.50 5.22 8.71 8.60 11.04 14.55 ***** 6.45 ***** 2.67 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -28.5 -34.5 -10.5 -2.5 3.0 6.0 10.0 11.5 ***** -3.5 ***** -16.5 ****** DAY 13 5 5 11 1 4 21 30 ** 20 ** 29 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 2.5 5.5 17.5 21.0 27.0 32.5 32.5 32.5 ***** 25.0 ***** 13.0 ****** DAY 4 17 22 19 27 21 13 17 ** 1 ** 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 11.2 18.2 11.0 24.0 8.0 0.0 3.0 0.0 ***** 5.0 ***** 31.0 ****** DAY 7 26 31 10 4 ** 8 ** ** 11 ** 5 MONTHLY TOTAL PRECIPITATION IN MM. 44.8 52.8 28.4 54.2 11.0 0.0 3.0 0.0 ***** 5.0 ***** 49.2 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 50.7 26.2 1.2 21.8 NO. OF DAYS WITH PRECIPITATION. 13 6 6 8 2 0 1 0 *** 1 *** 9 *** NO. OF DAYS PRECIPITATION EQUAL 11 6 6 8 2 0 1 0 *** 1 *** 9 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 2 1 1 0 0 0 0 *** 0 *** 1 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** 68 60 46 47 56 55 *** 65 *** 39 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 34 45 63 58 52 36 40 57 *** 43 *** 62 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** 56 52 47 33 44 54 *** 52 *** 50 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 31 28 13 0 0 0 0 0 *** 0 *** 30 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 *** 0 *** 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 24 13 1 0 0 0 0 0 *** 0 *** 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 10 17 20 *** 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. 31 28 18 3 0 0 0 0 *** 13 *** 31 *** DATE OF START AND END FREEZING START = 18 OCT. END = 13 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -6.6 -5.2 1.5 7.7 13.6 17.8 23.2 23.3 17.6 8.9 4.1 -4.7 8.4 AVERAGE OF MINIMUM TEMPERATURE IN C. -15.7 -14.8 -7.5 -1.6 5.0 8.5 13.8 14.0 8.4 -2.2 -2.5 -13.7 -0.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.5 4.4 10.5 17.0 22.2 27.0 32.5 32.5 26.9 20.0 10.8 4.3 17.6 DIFFERENCE BETWEEN AVERAGE MAXIMUM 18.2 19.2 18.0 18.6 17.2 18.5 18.7 18.5 18.5 22.2 13.3 18.0 18.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 0.78 2.05 2.62 4.17 6.18 9.84 10.39 10.71 7.35 2.49 3.03 1.31 5.08 MEAN OF MIXING RATIO AT 09 GMT. 1.35 2.56 5.00 5.30 8.45 14.93 17.92 20.75 12.30 5.08 4.73 3.26 8.47 MEAN OF MIXING RATIO AT 15 GMT. 1.46 2.08 4.15 5.36 7.88 12.92 14.00 16.28 9.73 5.10 4.08 2.66 7.14 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -20.5 -20.0 -14.5 -12.0 2.5 7.0 10.5 9.5 4.5 -10.0 -10.5 -25.0 -25.0 DAY 30 2 8 4 2 3 15 29 30 28 30 31 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 5.5 9.5 15.5 21.0 27.5 29.0 34.5 34.5 30.5 24.5 17.5 7.5 34.5 DAY 1 22 27 20 21 18 30 13 1 1 3 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 15.0 9.0 8.0 12.0 40.0 0.0 0.0 0.0 0.0 0.0 13.0 50.0 50.0 DAY 4 24 19 26 12 ** ** ** ** ** 11 23 MONTHLY TOTAL PRECIPITATION IN MM. 50.0 26.0 18.0 50.0 59.0 0.0 0.0 0.0 0.0 0.0 23.0 106.0 332.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 28.3 32.8 0.0 38.9 NO. OF DAYS WITH PRECIPITATION. 10 7 3 8 4 0 0 0 0 0 4 12 48 NO. OF DAYS PRECIPITATION EQUAL 10 7 3 8 4 0 0 0 0 0 4 12 48 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 0 0 2 2 0 0 0 0 0 1 2 8 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 28 58 55 60 59 60 61 61 50 36 55 49 53 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 26 41 58 40 47 59 49 56 47 32 54 55 47 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 37 43 57 56 55 63 45 55 44 41 56 55 51 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 31 28 31 8 0 0 0 0 0 9 11 31 149 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 4 8 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 31 31 2 0 0 0 64 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 28 31 17 0 0 0 0 0 22 23 31 183 DATE OF START AND END FREEZING START = 7 OCT. END = 30 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -2.8 -2.3 -1.4 8.0 13.5 19.5 23.7 23.0 18.5 12.0 5.1 2.2 9.9 AVERAGE OF MINIMUM TEMPERATURE IN C. -9.9 -6.9 -7.9 2.6 6.8 11.3 15.2 15.5 9.6 5.2 -1.5 -3.1 3.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. 4.3 2.2 5.1 13.5 20.2 27.8 32.2 30.5 27.4 18.9 11.7 7.5 16.8 DIFFERENCE BETWEEN AVERAGE MAXIMUM 14.2 9.1 13.0 10.9 13.4 16.6 17.0 15.0 17.8 13.7 13.2 10.6 13.7 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.69 2.32 2.47 4.96 6.46 8.03 11.32 8.46 6.68 5.97 3.89 3.39 5.55 MEAN OF MIXING RATIO AT 09 GMT. 4.08 3.60 3.65 6.54 8.45 9.60 16.66 11.12 10.53 8.15 5.42 4.60 7.70 MEAN OF MIXING RATIO AT 15 GMT. 3.65 3.26 3.37 5.58 6.87 8.58 15.17 10.04 9.51 7.34 5.08 4.65 6.93 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -28.0 -15.5 -23.0 -2.5 2.0 7.0 11.5 10.5 5.5 1.0 -7.5 -14.5 -28.0 DAY 1 16 2 7 1 7 5 28 20 30 30 24 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 8.5 8.5 13.0 20.0 24.5 32.0 34.5 34.5 31.5 23.0 18.0 16.0 34.5 DAY 26 4 20 16 31 25 31 1 6 2 5 15 24 HOUR MAXIMUM PRECIPITATION IN MM. 15.0 41.0 15.0 35.0 24.0 15.0 3.0 0.0 0.0 13.0 13.0 12.0 41.0 DAY 19 10 21 5 14 6 26 ** ** 29 12 10 MONTHLY TOTAL PRECIPITATION IN MM. 51.0 95.2 54.0 131.0 49.0 15.0 3.0 0.0 0.0 27.0 25.0 40.0 490.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 40.8 39.8 0.6 18.8 NO. OF DAYS WITH PRECIPITATION. 6 11 8 9 5 1 1 0 0 4 3 8 56 NO. OF DAYS PRECIPITATION EQUAL 6 11 8 9 5 1 1 0 0 4 3 8 56 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 4 1 6 2 1 0 0 0 1 1 1 20 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 60 59 59 70 63 52 60 46 55 66 70 69 61 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 67 68 58 58 50 35 47 35 40 52 57 62 52 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 70 71 61 58 47 37 51 37 43 57 64 76 56 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 20 23 24 0 0 0 0 0 0 0 8 13 88 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 1 1 0 0 0 0 2 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 2 7 4 0 0 0 0 0 0 0 0 2 15 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 8 27 22 9 0 0 0 66 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 27 31 10 0 0 0 0 0 0 20 24 142 DATE OF START AND END FREEZING START = 2 NOV. END = 28 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -5.1 1.4 8.0 9.4 14.8 20.3 24.4 23.1 18.8 11.4 5.7 2.6 11.2 AVERAGE OF MINIMUM TEMPERATURE IN C. -10.7 -5.5 2.1 3.6 8.7 11.7 15.6 15.3 10.0 4.9 -0.4 -1.3 4.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 0.5 8.3 14.0 15.2 21.0 29.0 33.3 31.0 27.5 17.9 11.9 6.5 18.0 DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.2 13.8 11.9 11.6 12.3 17.3 17.7 15.7 17.5 13.0 12.3 7.8 13.5 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 1.91 2.90 4.43 5.26 7.31 8.89 9.54 9.43 6.70 5.52 4.01 3.78 5.81 MEAN OF MIXING RATIO AT 09 GMT. 3.18 4.57 5.51 7.06 9.10 11.38 14.50 13.48 10.46 7.75 5.78 4.46 8.10 MEAN OF MIXING RATIO AT 15 GMT. 2.72 4.20 4.97 6.52 8.20 9.85 12.42 11.25 9.60 7.15 5.61 4.58 7.26 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -19.5 -16.5 -2.0 -1.0 6.0 8.0 8.5 11.0 7.0 -5.0 -6.5 -10.5 -19.5 DAY 24 3 15 17 3 1 1 19 20 27 28 30 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 5.0 15.5 18.5 21.5 26.5 33.0 36.5 34.0 29.5 27.0 15.0 13.0 36.5 DAY 19 28 18 30 13 25 15 15 14 2 28 4 24 HOUR MAXIMUM PRECIPITATION IN MM. 6.0 12.2 18.0 41.0 20.0 2.0 0.0 0.0 0.0 39.0 19.0 30.0 41.0 DAY 3 7 4 24 23 1 ** ** ** 19 12 14 MONTHLY TOTAL PRECIPITATION IN MM. 36.4 15.2 41.4 115.2 80.0 2.0 0.0 0.0 0.0 125.0 59.0 74.8 549.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 16.9 35.9 0.0 47.1 NO. OF DAYS WITH PRECIPITATION. 9 2 6 8 9 1 0 0 0 6 5 7 53 NO. OF DAYS PRECIPITATION EQUAL 9 2 6 8 9 1 0 0 0 6 5 7 53 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 1 4 3 0 0 0 0 4 3 4 20 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 56 66 65 69 64 56 48 54 54 68 73 70 62 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 70 58 48 55 50 40 39 41 38 53 57 61 51 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 67 71 53 61 55 39 39 39 43 59 65 73 55 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 29 17 0 0 0 0 0 0 0 1 5 6 58 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 10 1 0 0 0 0 0 0 0 0 0 0 11 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 16 30 26 0 0 0 0 72 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 7 2 0 0 0 0 0 4 16 23 108 DATE OF START AND END FREEZING START = 24 OCT. END = 17 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. 0.9 2.7 5.6 11.6 15.0 18.5 22.6 22.9 18.5 12.5 3.1 4.6 11.5 AVERAGE OF MINIMUM TEMPERATURE IN C. -4.0 -2.7 0.3 6.0 8.2 10.0 14.6 14.6 8.7 3.9 -2.7 0.1 4.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 5.7 8.2 10.8 17.2 21.8 27.0 30.8 31.2 28.3 21.1 9.0 9.1 18.4 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.7 10.9 10.5 11.2 13.6 17.0 16.2 16.6 19.6 17.2 11.7 9.0 13.6 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.76 2.95 3.73 4.45 6.05 7.12 8.54 8.41 6.04 4.77 3.10 3.38 5.11 MEAN OF MIXING RATIO AT 09 GMT. 3.71 4.48 4.93 5.97 8.43 10.48 12.92 12.72 10.44 7.27 4.37 4.77 7.54 MEAN OF MIXING RATIO AT 15 GMT. 3.60 4.17 4.83 5.44 7.39 9.15 11.34 11.09 9.45 6.36 4.15 4.49 6.79 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -12.5 -14.0 -11.0 -2.0 1.0 3.5 10.5 10.0 3.0 2.0 -9.0 -7.0 -14.0 DAY 15 27 1 15 4 3 9 21 30 10 5 18 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.5 14.5 17.0 21.5 27.0 33.0 34.0 32.5 31.5 25.5 13.0 13.5 34.0 DAY 1 16 29 10 26 30 23 10 2 1 1 25 24 HOUR MAXIMUM PRECIPITATION IN MM. 20.0 18.0 20.0 15.0 2.2 0.0 0.0 0.0 0.0 14.0 5.0 30.0 30.0 DAY 4 24 13 25 1 ** ** ** ** 31 10 10 MONTHLY TOTAL PRECIPITATION IN MM. 49.0 65.0 60.8 15.0 4.2 0.0 0.0 0.0 0.0 17.0 13.8 150.0 374.8 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 46.6 5.1 0.0 48.2 NO. OF DAYS WITH PRECIPITATION. 6 6 7 1 2 0 0 0 0 2 5 8 37 NO. OF DAYS PRECIPITATION EQUAL 6 6 7 1 2 0 0 0 0 2 5 8 37 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 3 3 1 0 0 0 0 0 1 0 8 18 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 60 58 64 50 57 52 51 50 55 61 63 56 56 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 55 58 54 42 44 40 41 38 38 40 51 56 46 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 63 63 61 46 45 41 41 38 40 44 61 64 51 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 12 9 6 0 0 0 0 0 0 0 12 2 41 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 3 0 0 0 0 0 0 0 0 0 0 0 3 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 7 17 29 6 0 0 0 59 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. 27 16 13 2 0 0 0 0 0 0 23 16 97 DATE OF START AND END FREEZING START = 5 NOV. END = 15 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. 0.9 3.1 2.4 11.4 13.6 18.9 23.9 21.1 17.9 13.1 7.5 -0.3 11.1 AVERAGE OF MINIMUM TEMPERATURE IN C. -3.5 -2.1 -3.1 5.4 7.7 11.3 16.2 13.5 8.9 5.6 -0.6 -5.1 4.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 5.2 8.3 7.9 17.4 19.4 26.6 31.6 28.7 26.9 20.5 15.6 4.4 17.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.7 10.4 11.0 12.0 11.7 15.4 15.4 15.2 18.0 14.9 16.2 9.5 13.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.39 3.23 3.62 5.29 6.89 8.65 10.06 8.37 6.02 5.63 3.75 3.02 5.66 MEAN OF MIXING RATIO AT 09 GMT. 4.23 4.96 5.03 7.24 9.73 11.88 13.82 11.83 10.53 8.31 5.83 4.02 8.12 MEAN OF MIXING RATIO AT 15 GMT. 3.81 4.38 4.84 6.46 8.17 10.75 12.38 10.37 9.01 7.37 5.54 3.92 7.25 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -16.5 -8.0 -11.5 -4.0 4.0 8.5 11.5 8.0 5.5 0.5 -6.5 -22.0 -22.0 DAY 12 20 1 28 11 1 6 29 28 30 23 24 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 12.0 14.0 14.5 23.5 25.0 32.0 34.0 31.0 31.0 25.0 19.5 11.5 34.0 DAY 3 15 19 6 27 30 19 2 12 3 9 5 24 HOUR MAXIMUM PRECIPITATION IN MM. 13.0 12.0 30.0 10.0 27.0 0.0 0.0 0.0 0.0 8.0 7.0 12.0 30.0 DAY 22 9 27 22 8 ** ** ** ** 27 28 8 MONTHLY TOTAL PRECIPITATION IN MM. 41.0 39.0 81.0 16.0 97.0 0.0 0.0 0.0 0.0 17.0 9.0 52.8 352.8 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 45.6 32.0 0.0 22.3 NO. OF DAYS WITH PRECIPITATION. 5 5 9 2 7 0 0 0 0 3 2 8 41 NO. OF DAYS PRECIPITATION EQUAL 5 5 9 2 7 0 0 0 0 3 2 8 41 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 2 3 1 3 0 0 0 0 0 0 2 13 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 63 63 66 62 67 62 53 53 55 66 65 61 61 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 65 62 62 49 59 46 39 40 40 47 44 65 52 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 69 65 68 52 60 49 39 41 41 52 55 72 55 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 11 6 14 1 0 0 0 0 0 0 7 17 56 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 2 0 0 0 0 0 0 0 0 6 12 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 5 30 8 6 0 0 0 49 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 21 24 22 7 0 0 0 0 0 0 20 25 119 DATE OF START AND END FREEZING START = 5 NOV. END = 29 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -2.3 ***** ***** 11.6 14.9 20.3 23.8 23.0 17.5 11.7 7.4 2.6 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -6.6 ***** ***** 6.2 8.1 11.8 16.4 14.7 8.2 2.4 2.0 -2.8 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.0 ***** ***** 17.1 21.7 28.8 31.1 31.2 26.8 20.7 12.7 8.1 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.6 ***** ***** 10.9 13.6 17.0 14.7 16.5 18.5 18.3 10.7 10.9 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.64 ***** ***** 5.71 6.49 8.05 10.65 9.11 6.18 4.43 4.67 2.87 ***** MEAN OF MIXING RATIO AT 09 GMT. 3.30 ***** ***** 7.23 9.44 12.80 14.26 14.45 9.59 6.43 6.62 4.74 ***** MEAN OF MIXING RATIO AT 15 GMT. 2.43 ***** ***** 6.29 8.76 11.45 12.22 12.16 9.03 5.92 6.29 4.14 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -18.0 ***** ***** -2.5 2.5 8.0 13.5 12.0 1.5 -5.0 -5.0 -12.5 ****** DAY 1 ** ** 17 6 10 1 19 26 19 26 20 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 6.5 ***** ***** 22.5 27.5 31.5 33.0 33.5 31.0 25.0 16.5 18.5 ****** DAY 29 ** ** 21 22 8 28 5 5 6 3 6 24 HOUR MAXIMUM PRECIPITATION IN MM. 9.0 ***** ***** 15.0 10.0 0.0 0.0 0.0 0.0 0.0 14.0 6.0 ****** DAY 23 ** ** 3 5 ** ** ** ** ** 9 11 MONTHLY TOTAL PRECIPITATION IN MM. 36.6 ***** ***** 50.0 14.0 0.0 0.0 0.0 0.0 0.0 55.0 12.0 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 21.8 38.2 0.0 40.0 NO. OF DAYS WITH PRECIPITATION. 9 *** *** 8 2 0 0 0 0 0 8 2 *** NO. OF DAYS PRECIPITATION EQUAL 9 *** *** 8 2 0 0 0 0 0 8 2 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 *** *** 1 1 0 0 0 0 0 2 0 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 59 *** *** 64 61 57 56 51 56 53 71 57 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 64 *** *** 51 48 44 42 43 37 37 61 58 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 56 *** *** 54 53 45 41 41 40 43 69 63 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 21 *** *** 0 0 0 0 0 0 2 1 13 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 *** *** 0 0 0 0 0 0 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 7 *** *** 0 0 0 0 0 0 0 0 1 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** *** 0 0 10 30 26 6 0 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. 30 *** *** 2 0 0 0 0 0 12 10 24 *** DATE OF START AND END FREEZING START = 9 OCT. END = 18 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. 0.1 1.1 5.5 10.0 14.3 18.9 23.3 22.2 16.5 10.8 7.5 5.0 11.3 AVERAGE OF MINIMUM TEMPERATURE IN C. -4.6 -3.4 0.4 4.1 8.2 12.2 16.2 13.5 7.6 3.5 1.6 -0.1 4.9 AVERAGE OF MAXIMUM TEMPERATURE IN C. 5.0 5.4 10.5 15.8 20.4 25.6 30.5 31.0 25.6 18.1 13.5 10.3 17.6 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.6 8.8 10.1 11.7 12.2 13.4 14.3 17.5 18.0 14.6 11.9 10.4 12.7 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.72 2.91 3.87 5.01 6.47 8.19 10.76 8.60 5.64 5.10 4.22 3.39 5.57 MEAN OF MIXING RATIO AT 09 GMT. 4.00 4.20 5.52 7.72 9.34 12.48 16.98 15.54 9.44 8.32 5.88 5.14 8.71 MEAN OF MIXING RATIO AT 15 GMT. 3.75 3.85 5.06 6.38 7.87 10.42 14.10 13.53 8.63 7.28 5.24 4.95 7.59 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -17.0 -16.0 -10.0 -8.5 1.0 7.5 9.5 8.5 1.0 0.0 -6.5 -6.5 -17.0 DAY 14 12 5 2 2 7 3 14 26 31 23 1 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 8.5 11.0 18.5 22.5 26.5 31.0 34.0 34.0 29.5 23.5 17.5 13.5 34.0 DAY 7 19 20 21 26 30 12 19 3 4 2 2 24 HOUR MAXIMUM PRECIPITATION IN MM. 38.0 21.0 34.0 22.0 30.0 4.0 0.0 0.0 0.0 13.0 14.0 7.0 38.0 DAY 11 9 27 2 16 23 ** ** ** 13 21 26 MONTHLY TOTAL PRECIPITATION IN MM. 91.0 78.8 60.4 76.0 40.0 4.0 0.0 0.0 0.0 29.0 35.0 7.0 421.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 54.7 28.5 0.0 16.9 NO. OF DAYS WITH PRECIPITATION. 6 11 6 8 3 1 0 0 0 5 4 1 45 NO. OF DAYS PRECIPITATION EQUAL 6 11 6 8 3 1 0 0 0 5 4 1 45 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 3 2 4 1 0 0 0 0 1 2 0 16 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 61 62 63 63 60 59 56 53 54 68 62 55 60 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 63 63 58 56 52 51 52 46 40 55 51 55 54 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 71 68 64 57 53 50 50 47 42 58 56 65 57 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 16 13 5 2 0 0 0 0 0 0 4 6 46 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 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 0 3 20 26 0 0 0 0 49 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 12 6 0 0 0 0 0 1 13 13 91 DATE OF START AND END FREEZING START = 31 OCT. END = 19 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -0.6 -3.7 2.6 11.6 16.1 21.1 22.3 22.8 18.5 12.6 4.0 -5.3 10.2 AVERAGE OF MINIMUM TEMPERATURE IN C. -6.3 -8.9 -3.5 4.6 9.7 12.8 13.5 13.7 9.3 6.4 -1.9 -12.2 3.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. 5.0 1.5 8.5 18.6 22.7 29.4 31.2 31.8 27.7 18.8 9.9 1.7 17.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.3 10.4 12.0 14.0 13.0 16.6 17.7 18.1 18.4 12.4 11.8 13.9 14.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 1.65 1.06 2.62 5.53 7.60 8.87 7.95 8.67 5.98 5.74 3.10 1.24 5.00 MEAN OF MIXING RATIO AT 09 GMT. 3.39 2.89 4.51 8.67 12.08 15.79 13.38 14.28 10.26 6.75 4.79 2.67 8.29 MEAN OF MIXING RATIO AT 15 GMT. 3.07 1.93 4.03 7.45 10.22 13.50 11.27 11.88 8.98 6.20 4.59 1.78 7.07 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -25.0 -20.0 -13.5 -3.5 5.5 10.0 10.0 9.0 4.5 1.0 -6.5 -24.5 -25.0 DAY 21 19 30 1 9 8 26 17 18 31 16 8 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 12.0 8.0 35.0 22.5 25.5 32.5 33.5 34.5 30.0 24.5 19.5 7.5 35.0 DAY 28 28 29 26 17 9 18 4 1 7 20 28 24 HOUR MAXIMUM PRECIPITATION IN MM. 15.0 10.0 21.0 20.0 23.0 0.0 0.0 0.0 0.0 30.0 43.0 14.4 43.0 DAY 29 24 25 8 14 ** ** ** ** 9 10 30 MONTHLY TOTAL PRECIPITATION IN MM. 32.8 39.6 120.0 25.0 76.0 0.0 0.0 0.0 0.0 110.0 72.8 33.0 509.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 37.8 19.8 0.0 42.4 NO. OF DAYS WITH PRECIPITATION. 5 9 11 2 6 0 0 0 0 9 7 6 55 NO. OF DAYS PRECIPITATION EQUAL 4 9 11 2 6 0 0 0 0 9 7 6 54 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 6 1 4 0 0 0 0 5 1 1 20 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 43 37 52 65 66 58 49 56 52 66 62 51 55 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 51 57 61 56 60 54 42 43 40 47 57 51 52 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 55 46 64 59 63 56 40 42 40 52 66 47 53 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 21 27 9 0 0 0 0 0 0 0 10 27 94 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 10 0 0 0 0 0 0 0 0 0 12 26 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 1 0 0 16 24 29 1 0 0 0 71 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 28 16 2 0 0 0 0 0 0 21 29 125 DATE OF START AND END FREEZING START = 2 NOV. END = 10 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -3.3 -2.8 0.6 8.2 15.9 21.2 24.6 24.6 19.0 12.2 8.8 0.4 10.8 AVERAGE OF MINIMUM TEMPERATURE IN C. -9.2 -8.9 -5.4 2.2 9.5 12.2 15.2 15.6 9.4 2.2 1.4 -5.5 3.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.5 3.3 6.9 14.0 22.3 30.2 34.0 33.6 28.6 22.2 16.2 6.3 18.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.7 12.2 12.3 11.8 12.8 18.0 18.8 18.0 19.2 20.0 14.8 11.8 15.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 1.42 1.34 1.74 4.48 7.45 8.40 10.76 10.91 7.06 4.10 3.72 2.12 5.29 MEAN OF MIXING RATIO AT 09 GMT. 3.27 3.19 4.19 6.80 11.71 17.20 21.81 22.68 16.38 10.32 6.79 3.73 10.67 MEAN OF MIXING RATIO AT 15 GMT. 2.37 2.32 3.62 6.16 10.06 14.85 18.62 18.89 14.38 8.79 5.97 3.10 9.10 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -28.5 -22.0 -10.5 -11.0 3.5 8.5 10.5 8.5 4.5 -3.5 -2.5 -19.5 -28.5 DAY 27 2 8 2 3 15 8 28 27 24 4 22 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.0 7.5 15.0 19.5 26.5 34.0 36.5 36.5 33.5 26.5 20.5 15.5 36.5 DAY 23 25 28 17 23 18 12 10 3 11 2 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 11.8 10.2 18.2 10.6 10.0 0.0 0.0 0.0 0.0 0.0 28.0 19.0 28.0 DAY 15 17 31 14 6 ** ** ** ** ** 14 11 MONTHLY TOTAL PRECIPITATION IN MM. 44.8 16.6 42.6 42.4 23.0 0.0 0.0 0.0 0.0 0.0 68.0 83.0 320.4 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 32.5 20.4 0.0 47.1 NO. OF DAYS WITH PRECIPITATION. 8 5 4 7 3 0 0 0 0 0 3 8 38 NO. OF DAYS PRECIPITATION EQUAL 8 5 4 7 3 0 0 0 0 0 3 8 38 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 2 1 1 0 0 0 0 0 3 4 13 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 44 45 42 65 67 59 62 60 62 60 58 48 56 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 60 59 62 62 63 57 61 62 61 57 55 52 59 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 55 52 61 68 64 60 64 65 65 60 59 52 60 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 23 20 19 2 0 0 0 0 0 0 0 17 81 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 8 3 0 0 0 0 0 0 0 0 0 7 18 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 15 31 30 10 0 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. 27 28 27 9 0 0 0 0 0 5 8 21 125 DATE OF START AND END FREEZING START = 8 OCT. END = 15 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -2.7 -0.2 5.8 10.7 13.0 21.4 23.8 23.4 17.7 11.3 6.8 -1.8 10.8 AVERAGE OF MINIMUM TEMPERATURE IN C. -9.3 -6.1 0.3 3.9 6.4 13.0 15.7 14.1 7.9 2.8 1.7 -6.6 3.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.9 5.7 11.3 17.5 19.6 29.9 31.8 32.7 27.5 19.6 11.8 3.2 17.9 DIFFERENCE BETWEEN AVERAGE MAXIMUM 13.2 11.8 11.0 13.6 13.2 16.9 16.1 18.6 19.6 16.8 10.1 9.8 14.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 1.84 1.66 3.42 4.64 5.85 9.08 9.59 8.65 5.72 3.66 4.24 2.03 5.03 MEAN OF MIXING RATIO AT 09 GMT. 3.43 3.63 5.73 8.51 9.89 18.21 17.92 16.25 11.89 6.35 5.56 3.56 9.24 MEAN OF MIXING RATIO AT 15 GMT. 2.09 2.80 5.00 7.12 8.20 14.67 14.42 13.02 10.53 5.44 5.23 3.06 7.63 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -25.5 -22.5 -7.5 -3.0 -2.5 6.5 12.5 9.5 2.5 -4.0 -6.5 -11.5 -25.5 DAY 31 1 16 4 2 1 15 27 30 23 21 20 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 8.5 13.5 18.5 21.5 25.5 34.5 34.5 35.0 33.0 27.5 17.5 9.5 35.0 DAY 9 12 11 14 27 14 8 17 1 5 1 2 24 HOUR MAXIMUM PRECIPITATION IN MM. 12.2 4.0 21.0 34.0 6.2 0.0 0.0 0.0 0.0 15.2 25.4 12.4 34.0 DAY 17 23 25 23 9 ** ** ** ** 19 11 3 MONTHLY TOTAL PRECIPITATION IN MM. 31.0 5.8 77.0 59.6 6.2 0.0 0.0 0.0 0.0 15.2 62.8 45.4 303.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 37.6 21.7 0.0 40.7 NO. OF DAYS WITH PRECIPITATION. 4 2 7 2 1 0 0 0 0 1 8 6 31 NO. OF DAYS PRECIPITATION EQUAL 4 2 7 2 1 0 0 0 0 1 8 6 31 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 0 3 2 0 0 0 0 0 1 2 2 11 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 47 39 53 59 64 61 53 53 53 51 66 55 55 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 56 54 59 61 63 61 53 46 47 41 56 61 55 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 45 49 62 62 64 61 51 44 50 44 63 65 55 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 23 20 4 0 0 0 0 0 0 1 1 23 72 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 5 2 0 0 0 0 0 0 0 0 0 5 12 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 19 28 31 8 0 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. 29 26 16 5 1 0 0 0 0 6 6 29 118 DATE OF START AND END FREEZING START = 13 OCT. END = 2 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. 1.8 -0.2 3.6 10.6 14.7 20.7 24.1 21.0 18.2 12.0 6.8 0.6 11.2 AVERAGE OF MINIMUM TEMPERATURE IN C. -3.5 -4.7 -1.6 5.3 7.1 12.4 15.7 13.1 8.4 3.2 1.5 -4.5 4.4 AVERAGE OF MAXIMUM TEMPERATURE IN C. 7.1 4.3 8.9 15.9 22.2 29.0 32.7 29.0 27.7 20.8 12.1 5.7 18.0 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.6 9.0 10.5 10.6 15.1 16.6 17.0 15.9 19.3 17.6 10.6 10.2 13.6 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.86 2.24 3.46 5.13 5.68 7.59 8.92 7.07 3.99 3.47 3.56 2.23 4.68 MEAN OF MIXING RATIO AT 09 GMT. 4.69 4.27 4.59 7.60 11.26 16.26 18.02 12.27 9.17 5.21 6.29 4.30 8.66 MEAN OF MIXING RATIO AT 15 GMT. 4.00 3.45 4.21 6.26 9.30 13.67 13.92 10.46 8.19 4.54 4.80 3.61 7.20 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -14.5 -11.5 -14.5 -2.5 2.5 9.5 11.5 8.5 3.5 -4.5 -3.5 -15.5 -15.5 DAY 4 6 8 7 4 21 3 29 25 30 10 30 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 12.5 12.0 16.5 22.5 28.5 33.0 36.5 33.0 32.5 30.5 17.5 11.0 36.5 DAY 27 13 22 19 30 29 29 1 3 8 1 11 24 HOUR MAXIMUM PRECIPITATION IN MM. 15.2 12.4 25.0 7.6 10.2 4.2 0.0 0.0 0.0 0.0 10.2 60.2 60.2 DAY 31 25 19 5 17 11 ** ** ** ** 10 18 MONTHLY TOTAL PRECIPITATION IN MM. 41.2 44.6 71.4 18.0 18.8 6.4 0.0 0.0 0.0 0.0 19.4 79.4 299.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 52.5 14.4 0.0 33.0 NO. OF DAYS WITH PRECIPITATION. 5 8 7 5 3 2 0 0 0 0 3 8 41 NO. OF DAYS PRECIPITATION EQUAL 5 8 7 5 3 2 0 0 0 0 3 8 41 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 2 2 0 1 0 0 0 0 0 1 1 8 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 59 52 65 62 57 51 46 46 35 45 53 53 52 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 62 67 54 57 56 54 51 45 49 30 60 64 54 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 64 63 58 58 56 54 47 46 57 32 58 64 55 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 13 17 11 0 0 0 0 0 0 1 0 18 60 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 5 3 0 0 0 0 0 0 0 0 2 10 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 10 27 13 6 1 0 0 57 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 25 12 2 0 0 0 0 0 7 10 28 106 DATE OF START AND END FREEZING START = 10 OCT. END = 10 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. 0.3 0.2 2.8 9.4 13.3 19.0 24.4 21.4 16.8 13.2 2.9 -1.2 10.2 AVERAGE OF MINIMUM TEMPERATURE IN C. -4.6 -5.2 -3.2 3.2 7.4 10.9 16.1 13.3 7.5 5.1 -3.2 -6.7 3.4 AVERAGE OF MAXIMUM TEMPERATURE IN C. 5.3 5.6 8.0 15.5 19.5 27.1 32.6 29.4 26.2 21.3 9.1 4.1 17.0 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.9 10.8 11.2 12.3 12.1 16.2 16.5 16.1 18.7 16.2 12.3 10.8 13.6 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.74 1.98 2.71 5.08 5.26 5.93 7.41 6.45 3.60 4.02 2.62 1.67 4.12 MEAN OF MIXING RATIO AT 09 GMT. 3.87 4.01 4.50 6.73 7.32 7.33 8.37 7.11 4.62 5.26 3.99 3.69 5.57 MEAN OF MIXING RATIO AT 15 GMT. 3.53 3.52 3.88 6.09 5.94 6.37 6.32 5.69 4.73 4.78 3.70 2.66 4.77 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -16.5 -11.5 -11.5 -1.0 3.0 7.5 11.5 9.5 5.5 0.0 -10.5 -14.5 -16.5 DAY 20 9 16 5 1 1 27 31 3 24 18 2 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 11.5 12.5 15.5 19.5 25.5 34.5 36.5 32.5 29.5 27.0 15.0 7.5 36.5 DAY 2 23 28 17 20 29 1 1 15 1 2 20 24 HOUR MAXIMUM PRECIPITATION IN MM. 5.0 5.4 32.6 23.2 45.4 0.0 0.0 0.0 0.0 11.2 25.0 25.2 45.4 DAY 30 1 6 29 4 ** ** ** ** 21 25 17 MONTHLY TOTAL PRECIPITATION IN MM. 13.6 22.9 84.0 107.2 96.0 0.0 0.0 0.0 0.0 18.2 84.0 35.6 461.5 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 26.1 44.0 0.0 29.9 NO. OF DAYS WITH PRECIPITATION. 4 8 8 13 4 0 0 0 0 3 7 5 52 NO. OF DAYS PRECIPITATION EQUAL 4 8 8 13 4 0 0 0 0 3 7 5 52 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 4 5 2 0 0 0 0 1 3 1 16 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 64 50 59 68 51 43 38 42 35 49 56 44 50 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 59 60 59 54 44 28 25 24 19 31 49 63 43 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 63 63 61 61 45 29 23 23 25 33 56 59 45 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 13 18 9 0 0 0 0 0 0 0 15 22 77 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 3 1 2 0 0 0 0 0 0 0 1 3 10 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 6 27 13 0 0 0 0 46 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 26 26 23 2 0 0 0 0 0 3 22 28 130 DATE OF START AND END FREEZING START = 24 OCT. END = 5 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. 2.1 3.4 3.2 10.2 17.1 21.3 21.8 21.7 18.2 10.3 7.7 0.3 11.4 AVERAGE OF MINIMUM TEMPERATURE IN C. -3.6 -2.3 -1.3 4.1 9.9 12.3 13.0 11.9 8.6 4.4 0.9 -5.3 4.4 AVERAGE OF MAXIMUM TEMPERATURE IN C. 7.8 9.1 7.7 16.2 24.3 30.3 30.5 31.4 27.9 16.2 14.5 7.5 18.6 DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.4 11.4 9.0 12.1 14.4 18.0 17.5 19.5 19.3 11.8 13.6 12.8 14.2 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.45 2.83 3.45 4.53 6.21 6.15 7.12 6.01 4.99 5.05 3.37 2.31 4.54 MEAN OF MIXING RATIO AT 09 GMT. 4.31 4.38 4.78 6.10 9.16 7.92 8.56 6.91 6.47 5.91 4.01 3.51 6.00 MEAN OF MIXING RATIO AT 15 GMT. 3.78 4.03 4.36 5.17 7.20 6.38 7.29 5.78 5.49 5.07 3.58 3.33 5.12 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -12.5 -12.0 -7.5 -3.5 4.5 10.0 8.5 7.5 4.5 -1.0 -9.5 -16.5 -16.5 DAY 10 7 15 6 7 9 7 27 28 9 30 29 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 15.0 16.0 13.5 23.5 31.0 34.0 34.5 34.5 30.5 28.0 20.0 15.0 34.5 DAY 31 2 8 29 22 27 15 11 4 2 5 17 24 HOUR MAXIMUM PRECIPITATION IN MM. 5.0 6.4 29.6 19.4 8.0 0.0 7.0 0.0 0.0 22.4 7.6 22.0 29.6 DAY 7 28 1 19 5 ** 25 ** ** 22 7 23 MONTHLY TOTAL PRECIPITATION IN MM. 6.0 24.2 133.8 30.2 21.8 0.0 21.4 0.0 0.0 99.2 16.6 75.8 429.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 38.2 12.1 5.0 44.7 NO. OF DAYS WITH PRECIPITATION. 2 7 13 5 6 0 5 0 0 11 4 11 64 NO. OF DAYS PRECIPITATION EQUAL 2 7 13 5 6 0 5 0 0 11 4 11 64 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 4 1 0 0 0 0 0 3 0 2 10 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 53 57 65 58 52 40 47 39 44 68 52 46 52 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 53 52 63 45 43 26 29 22 25 49 35 48 41 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 60 60 67 46 41 26 31 22 26 51 40 57 44 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 14 7 8 0 0 0 0 0 0 0 5 13 47 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 1 0 0 0 0 0 0 0 0 0 0 4 5 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 1 17 21 25 7 0 0 0 71 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. 27 20 19 6 0 0 0 0 0 2 15 16 105 DATE OF START AND END FREEZING START = 9 OCT. END = 8 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -2.2 -2.2 5.7 10.2 16.0 20.3 24.3 22.4 18.3 14.0 7.1 3.0 11.4 AVERAGE OF MINIMUM TEMPERATURE IN C. -6.4 -7.8 0.4 4.2 8.8 12.2 15.1 13.7 8.4 5.6 0.5 -2.3 4.4 AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.0 3.3 10.9 16.3 23.2 28.3 33.4 31.1 28.2 22.4 13.7 8.4 18.4 DIFFERENCE BETWEEN AVERAGE MAXIMUM 8.4 11.1 10.5 12.1 14.4 16.1 18.3 17.4 19.8 16.8 13.2 10.7 14.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 1.60 1.30 3.47 5.01 5.21 5.58 6.67 6.35 4.35 3.90 3.45 2.72 4.13 MEAN OF MIXING RATIO AT 09 GMT. 2.89 3.08 4.58 5.34 6.11 4.89 6.92 6.65 4.60 4.38 3.77 3.54 4.73 MEAN OF MIXING RATIO AT 15 GMT. 2.25 2.56 4.02 4.75 4.77 4.28 5.78 5.87 4.11 3.79 3.76 3.09 4.08 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -19.5 -17.0 -6.5 -6.5 5.5 7.0 10.5 11.0 5.0 2.0 -8.0 -17.0 -19.5 DAY 20 26 16 2 7 26 2 26 29 11 26 28 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 8.0 11.5 17.5 21.5 27.0 32.5 38.0 33.5 32.5 26.5 21.0 16.0 38.0 DAY 6 1 27 8 28 13 24 9 11 5 4 11 24 HOUR MAXIMUM PRECIPITATION IN MM. 8.6 47.0 33.2 15.0 6.8 0.0 0.0 0.0 1.2 8.0 21.2 13.5 47.0 DAY 8 23 2 20 2 ** ** ** 3 17 13 26 MONTHLY TOTAL PRECIPITATION IN MM. 51.6 146.1 100.6 65.8 7.8 0.0 0.0 0.0 1.2 14.0 61.6 30.3 479.0 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 62.3 15.4 0.3 22.1 NO. OF DAYS WITH PRECIPITATION. 9 8 6 9 2 0 0 0 1 3 5 4 47 NO. OF DAYS PRECIPITATION EQUAL 9 8 6 9 2 0 0 0 1 3 5 4 47 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 4 4 2 0 0 0 0 0 0 3 1 14 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 42 36 58 64 44 37 37 39 36 44 56 55 46 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 55 53 51 42 31 18 20 23 19 25 35 46 35 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 51 54 53 46 29 19 20 23 20 27 48 49 37 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 23 25 4 2 0 0 0 0 0 0 7 8 69 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 10 6 0 0 0 0 0 0 0 0 0 2 18 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 5 27 22 9 0 0 0 63 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 27 13 4 0 0 0 0 0 0 11 23 108 DATE OF START AND END FREEZING START = 15 NOV. END = 4 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -7.2 -5.8 3.1 9.8 15.2 21.4 24.3 23.2 17.0 12.8 6.9 1.0 10.1 AVERAGE OF MINIMUM TEMPERATURE IN C. -13.4 -12.1 -1.6 3.3 8.5 12.6 15.4 14.8 8.0 3.8 1.0 -4.5 3.0 AVERAGE OF MAXIMUM TEMPERATURE IN C. -0.8 0.4 7.9 16.2 21.8 30.2 33.2 31.6 26.0 21.9 12.7 6.5 17.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 12.6 12.5 9.5 12.9 13.3 17.6 17.8 16.8 18.0 18.1 11.7 11.0 14.3 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 1.12 1.96 3.48 4.43 5.52 5.20 5.91 5.93 4.00 3.61 4.28 2.25 3.97 MEAN OF MIXING RATIO AT 09 GMT. 2.32 2.32 4.42 4.44 5.17 4.43 5.29 4.63 4.17 3.95 4.31 3.84 4.11 MEAN OF MIXING RATIO AT 15 GMT. 1.71 1.68 4.20 4.22 4.75 3.96 4.70 3.97 3.30 4.19 4.25 3.50 3.70 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -25.5 -25.5 -13.0 -7.5 1.0 8.5 11.5 10.5 1.5 0.5 -5.0 -11.5 -25.5 DAY 31 7 30 2 2 17 9 31 13 26 3 18 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 6.0 5.0 13.5 21.5 29.5 35.0 37.0 33.5 33.0 27.0 17.0 10.5 37.0 DAY 20 28 8 14 31 29 3 25 1 6 5 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 17.0 7.4 21.0 5.0 4.4 0.0 0.0 0.0 0.0 4.0 25.4 43.8 43.8 DAY 29 23 28 30 8 ** ** ** ** 22 14 3 MONTHLY TOTAL PRECIPITATION IN MM. 95.0 35.3 86.6 12.0 11.4 0.0 0.0 0.0 0.0 7.2 55.0 86.6 389.1 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 55.7 6.0 0.0 38.2 NO. OF DAYS WITH PRECIPITATION. 11 7 13 5 5 0 0 0 0 2 5 4 52 NO. OF DAYS PRECIPITATION EQUAL 11 7 13 5 5 0 0 0 0 2 5 4 52 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 0 4 0 0 0 0 0 0 0 2 2 11 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 49 69 64 59 50 32 30 33 38 46 70 50 49 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 52 47 57 34 29 15 17 14 21 23 42 56 34 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 55 48 66 42 33 16 16 15 19 31 52 64 38 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 31 22 9 1 0 0 0 0 0 0 3 16 82 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 22 15 1 0 0 0 0 0 0 0 0 0 38 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 15 26 28 9 0 0 0 78 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 28 19 6 0 0 0 0 0 0 9 28 121 DATE OF START AND END FREEZING START = 2 NOV. END = 6 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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 SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -1.2 -2.8 4.9 11.1 15.0 19.8 ***** 25.5 23.1 17.3 10.0 -0.4 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -6.6 -8.0 -0.6 4.3 6.6 10.9 ***** 15.4 13.0 9.0 0.4 -9.6 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 4.1 2.4 10.3 17.8 23.5 28.7 ***** 35.6 33.0 25.7 19.6 9.0 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.7 10.4 10.9 13.5 16.9 17.8 ***** 20.2 20.0 16.7 19.2 18.6 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.64 2.74 3.88 4.30 4.35 5.49 ***** 4.66 5.52 6.33 3.68 2.59 ***** MEAN OF MIXING RATIO AT 09 GMT. 3.63 3.31 4.55 4.51 4.29 5.10 ***** 6.43 8.51 5.60 4.37 3.75 ***** MEAN OF MIXING RATIO AT 15 GMT. 2.99 2.45 3.96 4.10 3.89 4.93 ***** 11.39 8.58 6.87 5.45 2.33 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -15.5 -21.5 -6.0 -1.0 0.0 5.5 ***** 11.5 9.5 6.5 -7.0 -15.0 ****** DAY 16 14 1 6 3 2 ** 28 30 23 21 20 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.5 10.5 18.5 25.0 29.0 32.0 ***** 38.0 35.0 29.5 23.0 14.0 ****** DAY 7 26 31 26 31 16 ** 3 1 30 2 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 12.0 12.0 26.0 3.0 0.0 0.0 ***** 0.0 0.0 4.0 0.0 21.0 ****** DAY 14 1 3 28 ** ** ** ** ** 18 ** 9 MONTHLY TOTAL PRECIPITATION IN MM. 35.0 31.0 86.6 3.0 0.0 0.0 ***** 0.0 0.0 6.8 0.0 64.0 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 67.4 1.3 0.0 31.3 NO. OF DAYS WITH PRECIPITATION. 6 7 11 1 0 0 *** 0 0 3 0 9 *** NO. OF DAYS PRECIPITATION EQUAL 6 7 11 1 0 0 *** 0 0 2 0 9 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 3 0 0 0 *** 0 0 0 0 1 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 72 75 67 52 45 40 *** 28 41 60 57 69 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 59 58 52 33 23 19 *** 16 28 31 32 47 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 61 56 54 36 26 23 *** 28 36 54 64 45 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 21 22 5 0 0 0 *** 0 0 0 7 31 *** 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 4 8 0 0 0 0 *** 0 0 0 0 0 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 10 *** 31 24 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 27 18 2 1 0 *** 0 0 0 14 31 *** DATE OF START AND END FREEZING START = 12 NOV. END = 3 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -8.0 -5.2 ***** 13.9 14.9 20.4 23.3 22.4 16.5 10.8 4.8 0.8 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -17.0 -12.1 ***** 9.0 8.6 13.8 14.5 14.4 7.5 1.6 -1.9 -3.2 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 1.0 1.7 ***** 18.9 21.1 27.0 32.1 30.4 25.5 20.0 11.4 4.8 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 18.0 13.8 ***** 9.9 12.5 13.3 17.6 16.0 18.0 18.4 13.3 8.0 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 1.66 1.89 ***** 6.90 7.12 8.37 7.19 6.46 4.43 3.46 3.73 3.82 ***** MEAN OF MIXING RATIO AT 09 GMT. 3.05 3.45 ***** 8.44 6.11 8.60 7.96 4.97 3.96 3.27 4.90 4.69 ***** MEAN OF MIXING RATIO AT 15 GMT. 1.68 2.06 ***** 6.52 6.45 6.80 6.28 5.73 3.39 2.94 4.14 3.68 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -25.0 -21.0 ***** 5.0 6.5 10.0 11.0 9.5 2.5 -1.0 -9.0 -9.0 ****** DAY 29 5 ** 14 7 3 11 31 30 27 22 27 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 7.5 6.5 ***** 23.5 28.0 32.0 35.0 34.5 30.0 25.0 17.5 11.0 ****** DAY 3 27 ** 20 30 30 3 11 1 3 20 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 5.0 25.0 ***** 49.0 37.0 10.0 0.0 7.0 0.0 0.0 15.0 7.0 ****** DAY 3 25 ** 27 6 6 ** 28 ** ** 24 3 MONTHLY TOTAL PRECIPITATION IN MM. 19.0 60.5 ***** 113.0 137.0 10.0 0.0 7.0 0.0 0.0 43.0 32.0 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 18.9 61.7 1.7 17.8 NO. OF DAYS WITH PRECIPITATION. 6 6 *** 8 10 1 0 1 0 0 4 6 *** NO. OF DAYS PRECIPITATION EQUAL 6 6 *** 8 10 1 0 1 0 0 4 6 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 2 *** 3 5 1 0 0 0 0 3 0 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 76 66 *** 63 69 55 39 44 42 54 75 83 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 68 68 *** 54 42 36 27 18 18 20 52 76 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 60 68 *** 63 54 38 22 27 18 21 52 73 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 31 26 *** 0 0 0 0 0 0 0 6 15 *** 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 13 11 *** 0 0 0 0 0 0 0 0 2 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 *** 0 0 4 29 19 1 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 29 *** 0 0 0 0 0 0 5 21 22 *** DATE OF START AND END FREEZING START = 26 OCT. END = 29 FEB. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -3.0 ***** ***** ***** 14.4 20.7 23.4 24.3 ***** ***** ***** ***** ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -6.8 ***** ***** ***** 7.3 12.3 15.1 16.4 ***** ***** ***** ***** ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 0.8 ***** ***** ***** 21.6 29.2 31.7 32.3 ***** ***** ***** ***** ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 7.6 ***** ***** ***** 14.3 16.9 16.6 15.9 ***** ***** ***** ***** ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** 5.80 5.83 5.97 17.07 ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 09 GMT. 3.94 ***** ***** ***** 6.18 6.63 8.04 24.99 ***** ***** ***** ***** ***** MEAN OF MIXING RATIO AT 15 GMT. 3.44 ***** ***** ***** 6.09 5.87 8.69 20.55 ***** ***** ***** ***** ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -16.0 ***** ***** ***** 2.0 9.0 12.0 10.0 ***** ***** ***** ***** ****** DAY 22 ** ** ** 10 21 8 29 ** ** ** ** ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 6.0 ***** ***** ***** 27.5 35.2 33.5 36.0 ***** ***** ***** ***** ****** DAY 9 ** ** ** 29 13 9 11 ** ** ** ** 24 HOUR MAXIMUM PRECIPITATION IN MM. 14.0 ***** ***** ***** 37.0 0.0 0.0 0.0 ***** ***** ***** ***** ****** DAY 5 ** ** ** 7 ** ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. 42.0 ***** ***** ***** 57.5 0.0 0.0 0.0 ***** ***** ***** ***** ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 42.2 57.8 0.0 ***** NO. OF DAYS WITH PRECIPITATION. 5 *** *** *** 4 0 0 0 *** *** *** *** *** NO. OF DAYS PRECIPITATION EQUAL 5 *** *** *** 4 0 0 0 *** *** *** *** *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 3 *** *** *** 2 0 0 0 *** *** *** *** *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** 59 43 36 77 *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 84 *** *** *** 36 24 27 70 *** *** *** *** *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 86 *** *** *** 55 36 34 74 *** *** *** *** *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 26 *** *** *** 0 0 0 0 *** *** *** *** *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 *** *** *** 0 0 0 4 *** *** *** *** *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 15 *** *** *** 0 0 0 0 *** *** *** *** *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 *** *** *** 0 13 27 31 *** *** *** *** *** 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. 30 *** *** *** 0 0 0 0 *** *** *** *** *** DATE OF START AND END FREEZING START = 1 JAN. END = 31 JAN. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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.***** ***** ***** ***** ***** 19.9 25.6 18.8 12.2 8.9 7.9 1.3 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** 11.9 16.5 10.3 5.2 3.8 3.5 -2.3 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** 27.9 34.8 27.3 19.1 14.0 12.3 4.8 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** 16.0 18.3 17.0 13.9 10.2 8.8 7.1 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** 6.70 11.72 6.25 5.74 5.86 5.61 3.43 ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** 6.14 14.56 8.17 7.17 7.51 7.11 5.30 ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** 4.59 11.42 5.26 5.36 6.13 5.78 3.78 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** 9.0 13.0 4.0 3.0 1.0 1.0 -19.0 ****** DAY ** ** ** ** ** 5 26 31 18 10 15 6 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** 31.0 37.0 34.0 25.0 19.0 17.5 11.0 ****** DAY ** ** ** ** ** 17 15 1 4 4 4 1 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** 0.0 0.0 0.0 9.0 43.0 45.0 10.0 ****** DAY ** ** ** ** ** ** ** ** 25 16 7 4 MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** 0.0 0.0 0.0 40.0 182.5 184.1 13.0 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** 0.0 9.5 90.5 NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** 0 0 0 7 10 10 2 *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** 0 0 0 7 10 10 2 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** 0 0 0 0 6 5 1 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** 47 55 46 69 78 75 71 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** 23 37 30 45 64 69 77 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** 21 35 24 41 63 67 69 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** 0 0 0 0 0 0 10 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** 0 0 0 0 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** 0 0 0 0 0 0 3 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** 6 31 10 0 0 0 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** 0 0 0 0 0 0 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** 0 0 0 0 0 0 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** 0 0 0 0 0 0 18 *** DATE OF START AND END FREEZING START = 4 DEC. END = 31 DEC. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. 1.4 3.9 8.0 12.1 ***** 15.8 21.2 20.8 16.1 13.4 ***** 1.0 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. -4.2 -1.7 2.7 6.5 ***** 8.2 9.7 8.9 4.6 4.9 ***** -4.0 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. 7.0 9.5 13.2 17.8 ***** 23.5 32.7 32.7 27.5 20.3 14.2 5.9 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.2 11.2 10.5 11.3 ***** 15.3 23.0 23.8 22.9 15.4 ***** 9.9 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.28 3.50 4.29 6.44 ***** 8.43 7.73 7.11 5.88 5.65 4.64 3.28 ***** MEAN OF MIXING RATIO AT 09 GMT. 4.51 4.60 5.20 7.25 ***** 10.08 8.24 9.18 8.70 7.62 7.00 4.62 ***** MEAN OF MIXING RATIO AT 15 GMT. 4.25 4.18 4.46 6.21 ***** 7.17 6.69 7.58 5.92 5.85 5.28 3.65 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. -10.0 -6.0 -6.0 1.0 ***** 4.0 5.0 4.0 1.0 -1.0 ***** -10.0 ****** DAY 1 4 9 4 ** 11 3 23 12 18 ** 7 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.0 12.0 19.0 24.0 ***** 29.0 36.0 34.0 34.0 26.0 20.0 11.0 ****** DAY 8 2 14 29 ** 29 14 6 3 9 2 31 24 HOUR MAXIMUM PRECIPITATION IN MM. 14.0 11.0 10.0 13.0 ***** 18.0 0.0 0.0 0.0 0.0 0.0 0.0 ****** DAY 6 5 2 4 ** 8 ** ** ** ** ** ** MONTHLY TOTAL PRECIPITATION IN MM. 18.0 34.0 31.0 79.0 ***** 70.5 0.0 0.0 0.0 0.0 0.0 0.0 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 35.7 64.3 0.0 0.0 NO. OF DAYS WITH PRECIPITATION. 3 5 7 10 *** 10 0 0 0 0 0 0 *** NO. OF DAYS PRECIPITATION EQUAL 3 5 6 10 *** 10 0 0 0 0 0 0 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 3 1 5 *** 3 0 0 0 0 0 0 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 76 73 60 71 *** 67 37 34 46 60 62 79 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. 61 55 47 50 *** 49 22 25 33 45 59 70 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. 70 63 51 55 *** 45 22 25 28 44 55 66 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL 18 8 2 0 *** 0 0 0 0 0 *** 16 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 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 0 *** 0 29 31 11 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. 28 21 11 0 *** 0 0 0 0 1 *** 31 *** DATE OF START AND END FREEZING START = 18 OCT. END = 20 MAR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. MEAN AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. -1.6 1.2 2.3 9.3 16.4 21.6 22.7 22.1 18.7 12.2 6.5 3.0 11.2 AVERAGE OF MINIMUM TEMPERATURE IN C. -7.1 -3.6 -2.3 3.9 10.5 15.1 15.7 13.8 9.7 3.8 -0.8 -4.3 4.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.4 5.9 6.8 14.7 22.2 28.2 29.6 30.4 27.8 20.7 13.8 10.3 17.8 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.5 9.5 9.1 10.8 11.7 13.1 13.9 16.6 18.1 16.9 14.6 14.6 13.3 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.82 3.83 4.29 5.16 7.02 7.20 7.20 6.03 4.46 4.49 3.65 3.65 4.98 MEAN OF MIXING RATIO AT 09 GMT. 3.91 4.72 5.36 5.52 6.99 8.27 8.12 7.31 4.62 4.64 5.51 4.59 5.80 MEAN OF MIXING RATIO AT 15 GMT. 3.18 3.99 4.80 4.55 5.84 7.09 6.67 5.34 3.51 3.70 5.34 4.24 4.85 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -18.4 -10.5 -7.2 -3.0 6.5 10.0 11.0 10.0 6.0 -6.0 -9.0 -12.0 -18.4 DAY 12 23 22 17 2 10 17 26 23 18 12 1 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.0 11.0 16.0 20.0 28.0 31.0 33.0 32.0 31.0 27.0 18.0 17.0 33.0 DAY 2 25 30 21 31 22 3 6 5 12 1 29 24 HOUR MAXIMUM PRECIPITATION IN MM. 30.5 29.0 28.0 21.7 7.0 0.0 0.0 0.0 0.0 20.0 13.0 14.0 30.5 DAY 6 21 22 15 11 ** ** ** ** 15 28 22 MONTHLY TOTAL PRECIPITATION IN MM. 88.2 78.0 116.0 68.4 18.0 0.0 0.0 0.0 0.0 20.0 29.0 28.0 445.6 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 63.3 19.4 0.0 17.3 NO. OF DAYS WITH PRECIPITATION. 9 6 8 8 7 0 0 0 0 1 6 4 49 NO. OF DAYS PRECIPITATION EQUAL 9 6 8 8 7 0 0 0 0 1 6 4 49 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 2 3 5 4 0 0 0 0 0 1 1 1 17 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 76 80 87 74 61 46 39 38 38 59 68 72 62 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 77 69 74 47 36 30 27 23 17 28 53 52 44 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 73 71 78 47 37 31 26 22 17 28 63 60 46 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 19 14 7 0 0 0 0 0 0 2 4 18 64 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 1 2 0 0 0 0 0 3 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 3 0 0 0 0 0 0 0 0 0 0 0 3 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 7 16 25 8 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. 28 25 27 5 0 0 0 0 0 6 17 24 132 DATE OF START AND END FREEZING START = 16 OCT. END = 17 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -0.1 -3.3 0.3 7.9 13.1 19.1 24.2 24.8 18.0 13.2 4.2 0.3 10.1 AVERAGE OF MINIMUM TEMPERATURE IN C. -6.5 -11.7 -6.0 1.3 6.4 11.3 15.0 16.1 9.3 6.0 -1.5 -6.0 2.8 AVERAGE OF MAXIMUM TEMPERATURE IN C. 6.4 5.1 6.6 14.4 19.8 26.9 33.4 33.5 26.7 20.4 10.0 6.5 17.5 DIFFERENCE BETWEEN AVERAGE MAXIMUM 12.9 16.8 12.6 13.1 13.4 15.6 18.4 17.4 17.4 14.4 11.5 12.5 14.7 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.57 2.14 3.78 4.81 5.55 6.02 6.54 5.52 4.33 4.49 4.75 3.79 4.61 MEAN OF MIXING RATIO AT 09 GMT. 4.30 4.54 4.08 4.74 5.21 5.96 6.31 5.75 4.98 4.93 4.72 4.07 4.97 MEAN OF MIXING RATIO AT 15 GMT. 4.01 4.00 3.85 4.15 4.82 5.13 5.52 5.00 3.94 4.29 4.64 4.05 4.45 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -14.0 -20.0 -19.0 -10.0 -5.0 6.0 10.0 11.0 3.0 0.0 -9.0 -15.0 -20.0 DAY 22 1 8 12 6 4 7 31 15 25 28 28 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.0 13.0 13.0 24.0 26.0 30.0 37.0 36.0 32.0 25.0 14.0 12.0 37.0 DAY 1 21 3 26 30 12 28 2 4 3 2 8 24 HOUR MAXIMUM PRECIPITATION IN MM. 20.0 3.0 24.5 35.0 10.5 0.0 0.0 0.0 0.0 1.0 19.0 10.0 35.0 DAY 22 19 13 10 11 ** ** ** ** 20 5 5 MONTHLY TOTAL PRECIPITATION IN MM. 21.0 6.0 79.8 129.5 50.5 0.0 0.0 0.0 0.0 1.0 52.0 25.0 364.8 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 29.3 49.3 0.0 21.4 NO. OF DAYS WITH PRECIPITATION. 3 2 7 8 8 0 0 0 0 1 9 3 41 NO. OF DAYS PRECIPITATION EQUAL 1 2 7 8 8 0 0 0 0 1 7 3 37 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 0 3 6 1 0 0 0 0 0 2 2 15 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 77 59 80 68 54 41 34 28 38 49 83 81 58 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 64 74 60 44 31 23 17 15 20 29 53 58 41 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 69 76 69 47 36 23 18 16 19 31 61 68 44 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 25 27 21 6 1 0 0 0 0 0 10 23 113 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 1 2 0 0 0 0 0 3 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 2 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 0 4 27 31 1 0 0 0 63 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. 27 27 24 9 1 0 0 0 0 2 19 29 138 DATE OF START AND END FREEZING START = 25 OCT. END = 6 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -4.5 -3.8 1.8 10.5 14.2 20.6 23.9 23.2 19.4 11.9 9.3 9.1 11.3 AVERAGE OF MINIMUM TEMPERATURE IN C. -11.4 -10.7 -5.5 3.9 7.3 12.7 15.7 15.7 11.1 4.1 3.0 4.1 4.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.4 3.4 8.9 17.1 21.1 28.5 31.9 30.6 27.7 19.8 15.7 14.0 18.4 DIFFERENCE BETWEEN AVERAGE MAXIMUM 13.8 14.1 14.4 13.2 13.8 15.8 16.2 14.9 16.6 15.7 12.7 9.9 14.3 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 3.07 2.49 3.61 4.77 6.28 5.49 7.00 6.83 5.15 4.10 3.34 3.55 4.64 MEAN OF MIXING RATIO AT 09 GMT. 4.03 4.12 4.25 4.78 5.33 4.89 5.61 6.46 5.08 4.24 3.38 3.45 4.64 MEAN OF MIXING RATIO AT 15 GMT. 3.48 3.15 4.12 4.49 4.85 5.22 5.56 6.18 4.45 4.06 2.98 3.27 4.32 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -23.0 -22.0 -20.0 -5.0 1.0 8.0 10.0 12.0 7.0 1.0 -2.2 -4.0 -23.0 DAY 10 24 4 6 5 1 8 3 7 24 24 8 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 6.0 12.0 15.0 24.0 27.0 33.0 37.0 34.0 32.0 26.0 18.0 20.5 37.0 DAY 4 7 23 14 28 28 12 17 2 5 7 10 24 HOUR MAXIMUM PRECIPITATION IN MM. 12.9 38.0 46.7 9.0 7.2 0.0 0.0 7.0 0.0 22.9 3.0 2.0 46.7 DAY 6 10 29 20 4 ** ** 6 ** 11 12 27 MONTHLY TOTAL PRECIPITATION IN MM. 32.5 51.0 128.5 27.0 23.7 0.0 0.0 16.0 0.0 43.4 3.0 4.0 329.1 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 64.4 15.4 4.9 15.3 NO. OF DAYS WITH PRECIPITATION. 7 3 8 6 7 0 0 3 0 3 1 2 40 NO. OF DAYS PRECIPITATION EQUAL 6 3 8 6 6 0 0 3 0 3 1 2 38 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 5 0 0 0 0 0 0 2 0 0 9 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 81 65 67 58 58 33 37 39 38 52 54 54 53 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 75 72 55 36 30 17 16 21 20 27 26 31 36 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 75 68 63 42 33 21 20 24 21 32 28 37 39 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 25 21 19 2 0 0 0 0 0 0 0 1 68 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 3 0 0 0 0 0 3 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 4 7 0 0 0 0 0 0 0 0 0 0 11 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 11 24 23 6 0 0 0 64 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. 25 22 21 5 0 0 0 0 0 0 10 4 87 DATE OF START AND END FREEZING START = 1 NOV. END = 10 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. 0.6 2.4 2.9 9.9 15.5 23.7 22.8 24.0 18.5 13.4 5.2 3.0 11.8 AVERAGE OF MINIMUM TEMPERATURE IN C. -4.8 -4.2 -3.6 3.6 7.1 18.1 14.5 16.6 9.3 5.6 -1.2 -4.0 4.8 AVERAGE OF MAXIMUM TEMPERATURE IN C. 5.9 9.0 9.4 16.1 23.9 29.3 31.1 31.4 27.8 21.2 11.6 10.0 18.9 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.7 13.2 13.0 12.5 16.8 11.2 16.6 14.8 18.5 15.6 12.8 14.0 14.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.94 3.54 3.30 4.99 4.57 4.80 6.45 5.77 4.53 4.37 3.58 3.41 4.35 MEAN OF MIXING RATIO AT 09 GMT. 3.73 3.50 3.60 5.35 4.42 4.00 6.01 5.74 4.44 3.78 4.02 3.37 4.33 MEAN OF MIXING RATIO AT 15 GMT. 3.50 3.25 3.46 4.38 3.60 3.26 5.46 4.86 3.67 3.17 3.44 3.54 3.80 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -15.0 -13.4 -9.3 -5.0 1.0 11.0 9.2 13.0 4.0 2.0 -9.2 -11.4 -15.0 DAY 27 19 5 12 22 7 16 15 28 14 30 4 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 11.5 13.0 17.5 21.5 30.5 31.5 35.5 35.0 32.5 27.0 15.5 15.0 35.5 DAY 5 26 31 27 30 2 4 29 3 1 5 29 24 HOUR MAXIMUM PRECIPITATION IN MM. 10.2 18.5 12.6 10.9 5.0 0.0 5.0 0.0 0.0 0.0 57.9 14.0 57.9 DAY 9 22 21 2 5 ** 28 ** ** ** 8 11 MONTHLY TOTAL PRECIPITATION IN MM. 28.1 40.0 33.3 25.9 5.0 0.0 8.0 0.0 0.0 0.0 62.9 33.4 236.6 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 42.9 13.1 3.4 40.7 NO. OF DAYS WITH PRECIPITATION. 7 6 5 4 1 0 3 0 0 0 3 3 32 NO. OF DAYS PRECIPITATION EQUAL 7 6 5 4 1 0 3 0 0 0 3 3 32 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 2 1 0 0 0 0 0 0 1 2 8 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 72 74 72 61 38 29 37 29 37 48 64 74 53 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 59 44 45 41 21 14 20 17 17 22 41 40 32 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 67 50 51 40 19 13 21 17 16 23 45 55 35 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 18 17 15 1 0 0 0 0 0 0 6 17 74 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 5 2 1 0 0 0 0 8 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 1 0 0 0 0 0 0 0 0 0 0 0 1 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 2 14 21 31 10 0 0 0 78 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. 27 22 28 4 0 0 0 0 0 0 23 26 130 DATE OF START AND END FREEZING START = 2 NOV. END = 12 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 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. -2.2 -2.5 3.9 12.1 16.7 19.8 23.8 22.9 19.0 11.2 5.1 0.1 10.8 AVERAGE OF MINIMUM TEMPERATURE IN C. -8.8 -10.4 -2.7 5.3 8.9 10.1 15.5 14.2 10.2 3.4 -0.2 -5.7 3.3 AVERAGE OF MAXIMUM TEMPERATURE IN C. 4.4 5.4 10.6 18.8 24.6 29.5 32.0 31.6 27.8 18.9 10.4 6.0 18.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 13.2 15.8 13.3 13.5 15.7 19.4 16.5 17.4 17.6 15.5 10.6 11.7 15.0 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.36 2.18 3.66 4.30 4.50 4.11 5.40 4.42 4.37 4.37 4.16 3.03 3.91 MEAN OF MIXING RATIO AT 09 GMT. 4.02 4.14 3.23 4.71 4.34 4.23 4.83 4.80 3.98 3.97 4.15 3.92 4.19 MEAN OF MIXING RATIO AT 15 GMT. 3.29 3.54 2.71 4.03 3.26 3.18 3.97 4.00 3.65 3.49 3.65 3.69 3.54 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -18.2 -21.2 -8.2 -2.6 5.0 5.0 12.4 8.6 6.6 -1.0 -4.0 -18.6 -21.2 DAY 31 9 1 1 22 14 21 31 23 29 23 17 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 13.5 10.5 16.0 23.0 28.0 34.5 34.5 34.6 34.0 23.0 16.5 11.5 34.6 DAY 1 24 22 15 29 23 1 9 4 6 4 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 24.5 15.0 17.0 6.5 0.0 0.0 0.0 0.0 0.0 13.5 17.2 30.7 30.7 DAY 28 25 25 21 ** ** ** ** ** 15 6 1 MONTHLY TOTAL PRECIPITATION IN MM. 34.5 23.5 32.0 6.5 0.0 0.0 0.0 0.0 0.0 15.2 36.7 42.2 190.6 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 47.2 3.4 0.0 49.4 NO. OF DAYS WITH PRECIPITATION. 3 3 2 1 0 0 0 0 0 2 5 4 20 NO. OF DAYS PRECIPITATION EQUAL 3 3 2 1 0 0 0 0 0 2 5 4 20 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 2 0 0 0 0 0 0 1 1 1 7 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 70 64 74 51 36 27 27 26 34 59 75 75 52 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 66 63 36 29 20 15 14 15 15 27 46 58 34 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 70 69 36 32 18 13 14 14 17 30 49 69 36 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 26 26 11 0 0 0 0 0 0 0 1 19 83 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 3 0 0 0 0 0 3 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 1 0 0 0 0 0 0 0 0 0 0 1 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 14 28 30 6 0 0 0 78 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 29 25 3 0 0 0 0 0 4 16 30 137 DATE OF START AND END FREEZING START = 10 OCT. END = 7 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. MEAN AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. -0.3 1.3 6.4 11.8 15.1 19.2 22.9 22.6 18.0 13.7 7.8 5.0 12.0 AVERAGE OF MINIMUM TEMPERATURE IN C. -7.5 -3.5 -0.5 4.8 7.7 9.6 14.2 13.7 9.2 6.0 1.7 1.0 4.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 6.9 6.0 13.3 18.8 22.4 28.8 31.6 31.5 26.9 21.4 13.9 9.0 19.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 14.4 9.5 13.8 14.0 14.7 19.1 17.4 17.8 17.7 15.4 12.2 8.0 14.5 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.59 3.57 3.85 3.70 4.50 6.15 6.03 4.72 4.62 4.24 3.60 4.07 4.30 MEAN OF MIXING RATIO AT 09 GMT. 3.08 3.89 3.64 3.58 4.52 6.80 5.40 4.77 4.48 4.29 3.91 4.66 4.42 MEAN OF MIXING RATIO AT 15 GMT. 2.84 3.61 3.32 3.34 3.43 5.92 4.10 3.73 3.68 3.56 3.61 4.04 3.77 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -28.0 -9.0 -6.2 -1.0 1.6 5.0 9.0 10.0 5.4 2.6 -4.0 -7.0 -28.0 DAY 28 25 13 18 1 21 6 1 21 14 2 7 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 12.0 13.0 19.0 22.5 28.0 37.0 36.0 35.5 31.5 25.0 24.5 17.5 37.0 DAY 7 28 31 5 16 29 10 22 3 1 3 30 24 HOUR MAXIMUM PRECIPITATION IN MM. 0.0 10.0 18.7 3.0 25.0 9.0 0.0 0.0 3.5 3.5 31.0 32.5 32.5 DAY ** 14 10 9 4 12 ** ** 22 28 19 1 MONTHLY TOTAL PRECIPITATION IN MM. 0.0 23.5 45.4 3.0 35.0 9.0 0.0 0.0 6.3 6.0 39.5 116.6 284.3 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 24.2 16.5 2.2 57.0 NO. OF DAYS WITH PRECIPITATION. 0 3 3 1 3 1 0 0 2 2 4 7 26 NO. OF DAYS PRECIPITATION EQUAL 0 3 3 1 3 1 0 0 2 2 4 7 26 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 3 0 1 0 0 0 0 0 1 4 10 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 64 79 66 43 40 44 35 30 43 48 57 68 51 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 45 57 35 23 24 27 16 15 19 24 36 57 32 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 54 67 39 27 22 29 15 13 20 25 41 59 34 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 22 12 3 0 0 0 0 0 0 0 2 2 41 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 3 0 0 0 0 0 0 0 0 0 0 0 3 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 14 25 25 4 0 0 0 68 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 26 17 1 0 0 0 0 0 0 8 10 90 DATE OF START AND END FREEZING START = 2 NOV. END = 18 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. MEAN AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. -2.6 2.4 5.7 9.8 15.2 19.5 22.1 22.4 17.9 14.5 6.0 1.7 11.2 AVERAGE OF MINIMUM TEMPERATURE IN C. -9.2 -2.8 -2.2 3.9 8.0 11.2 13.2 12.7 6.7 6.4 0.4 -3.9 3.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 4.1 7.6 13.4 15.8 22.3 27.8 31.0 32.1 29.1 22.6 11.7 7.3 18.7 DIFFERENCE BETWEEN AVERAGE MAXIMUM 13.3 10.4 15.6 11.9 14.3 16.6 17.8 19.4 22.4 16.2 11.3 11.2 15.0 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.10 3.39 3.63 4.44 4.50 4.13 5.59 4.96 3.47 3.92 4.09 3.21 3.95 MEAN OF MIXING RATIO AT 09 GMT. 3.94 3.50 3.13 4.32 4.40 4.26 5.52 4.52 4.49 4.10 3.94 4.06 4.18 MEAN OF MIXING RATIO AT 15 GMT. 2.88 3.33 3.22 4.01 3.89 3.11 4.48 3.78 3.41 3.07 3.58 3.71 3.54 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -22.0 -10.0 -9.0 -1.4 2.2 3.2 8.4 10.0 1.2 3.0 -5.0 -9.2 -22.0 DAY 14 22 8 1 14 17 1 4 25 31 30 30 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.5 11.5 19.0 23.0 26.6 31.5 35.0 35.0 32.5 27.0 18.0 10.0 35.0 DAY 5 25 13 28 29 29 17 11 2 4 11 2 24 HOUR MAXIMUM PRECIPITATION IN MM. 13.2 10.0 22.0 16.2 9.0 1.0 0.0 0.0 0.0 5.0 5.5 19.0 22.0 DAY 12 13 28 20 5 10 ** ** ** 31 24 9 MONTHLY TOTAL PRECIPITATION IN MM. 25.7 19.6 55.8 30.5 19.3 1.0 0.0 0.0 0.0 5.0 25.3 40.0 222.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 45.5 22.9 0.0 31.6 NO. OF DAYS WITH PRECIPITATION. 3 2 6 5 3 1 0 0 0 1 8 7 36 NO. OF DAYS PRECIPITATION EQUAL 3 2 6 5 3 1 0 0 0 1 8 7 36 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 3 1 0 0 0 0 0 0 0 1 7 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 59 69 67 58 40 28 33 31 27 44 71 75 50 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 67 50 30 35 24 16 18 13 16 21 40 55 32 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 64 54 39 41 23 14 17 13 14 20 44 62 34 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 24 10 12 0 0 0 0 0 0 0 4 14 64 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 6 0 0 0 0 0 0 0 0 0 0 0 6 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 7 23 28 13 0 0 0 71 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. 27 21 20 3 0 0 0 0 0 0 14 30 115 DATE OF START AND END FREEZING START = 3 NOV. END = 5 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. MEAN AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPERATURE IN C. 0.3 -0.1 2.7 9.3 13.2 18.5 22.7 20.4 16.7 12.9 4.8 -1.4 10.0 AVERAGE OF MINIMUM TEMPERATURE IN C. -6.0 -6.0 -4.2 1.3 5.2 8.8 10.9 8.9 5.3 4.2 -2.7 -7.9 1.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 6.6 5.9 9.6 17.3 21.2 28.3 34.5 32.0 28.1 21.6 12.2 5.2 18.5 DIFFERENCE BETWEEN AVERAGE MAXIMUM 12.6 11.9 13.8 16.0 16.0 19.5 23.6 23.1 22.8 17.4 14.9 13.1 17.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.49 3.08 3.44 4.64 6.35 6.89 7.96 7.27 5.49 5.27 3.58 2.32 4.90 MEAN OF MIXING RATIO AT 09 GMT. 3.51 3.87 3.60 5.58 7.08 7.19 9.91 9.18 6.27 5.45 4.32 4.02 5.83 MEAN OF MIXING RATIO AT 15 GMT. 2.74 3.59 3.53 5.02 5.61 5.96 8.18 7.10 5.00 4.25 4.13 3.39 4.87 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -17.0 -18.0 -19.0 -3.0 -1.0 6.0 7.4 6.0 0.0 -4.2 -11.0 -15.0 -19.0 DAY 20 18 1 12 1 6 2 1 20 6 26 13 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 15.0 9.2 16.0 22.2 25.0 35.0 39.0 35.0 33.0 24.0 19.0 8.0 39.0 DAY 12 3 25 9 23 22 16 16 1 8 6 1 24 HOUR MAXIMUM PRECIPITATION IN MM. 10.2 11.3 25.0 40.5 20.0 0.0 0.0 0.0 0.0 15.0 8.0 15.0 40.5 DAY 16 25 26 22 20 ** ** ** ** 30 13 6 MONTHLY TOTAL PRECIPITATION IN MM. 29.5 23.8 65.2 111.8 23.0 0.0 0.0 0.0 0.0 20.0 11.0 45.1 329.4 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 36.0 40.9 0.0 23.1 NO. OF DAYS WITH PRECIPITATION. 5 4 6 11 2 0 0 0 0 2 2 6 38 NO. OF DAYS PRECIPITATION EQUAL 5 4 6 11 2 0 0 0 0 2 2 6 38 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 3 4 1 0 0 0 0 1 0 3 14 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 64 71 71 61 61 46 45 46 48 57 67 59 58 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 52 58 42 41 38 26 26 27 23 28 40 61 39 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 54 66 52 45 36 25 25 24 23 28 52 66 41 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 23 21 14 0 0 0 0 0 0 1 16 26 101 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 0 12 30 31 11 0 0 0 84 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 27 27 9 1 0 0 0 1 1 18 31 144 DATE OF START AND END FREEZING START = 20 SEP. END = 1 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. MEAN AND EXTREMES FOR THE PERIOD 1964 TO 2003 PAGE 1 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPE. IN C. -2.6 -1.4 3.6 9.6 14.5 19.6 23.0 22.3 17.5 12.3 6.1 0.6 10.4 SD OF MEAN DAILY TEMPERATURE IN C. 3.35 3.27 2.16 1.96 1.35 1.52 1.17 1.44 1.66 1.83 1.82 3.10 2.05 AVERAGE OF MINIMUM TEMPERATURE IN C. -8.8 -7.6 -2.5 3.2 7.3 11.1 14.1 13.4 8.1 4.2 -0.4 -5.4 3.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.6 4.8 9.7 15.9 21.7 28.2 32.0 31.1 27.0 20.3 12.6 6.6 17.8 DIFFERENCE BETWEEN AVERAGE MAXIMUM 12.3 12.3 12.2 12.7 14.3 17.1 17.9 17.7 18.8 16.0 12.9 12.0 14.7 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.27 2.50 3.45 4.72 5.74 6.62 7.64 7.33 5.20 4.50 3.74 2.69 4.70 MEAN OF MIXING RATIO AT 09 GMT. 3.39 3.68 4.43 5.72 6.99 8.63 10.01 9.98 7.59 5.73 4.81 3.90 6.23 MEAN OF MIXING RATIO AT 15 GMT. 2.87 3.15 4.00 5.07 6.09 7.28 8.46 8.54 6.46 5.10 4.43 3.39 5.40 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -30.0 -34.5 -23.0 -16.5 -5.0 1.5 5.0 4.0 -0.5 -10.0 -13.0 -28.0 -34.5 YEAR - DAY 64-20 74- 5 76- 2 67- 2 97- 6 67- 6 65- 7 94-31 66-21 75-28 73- 8 72-26 74- 5 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 15.0 16.0 35.0 25.0 31.0 37.0 39.0 38.0 35.0 31.0 24.5 20.5 39.0 YEAR - DAY 87-31 87- 2 82-29 91-26 87-22 1-29 3-16 91- 3 91- 1 64- 1 1- 3 98-10 3-16 24 HOUR MAXIMUM PRECIPITATION IN MM. 42.8 51.0 46.7 49.0 45.4 18.0 7.0 7.0 9.0 50.0 80.0 60.2 80.0 YEAR - DAY 69-23 66- 2 98-29 92-27 86- 4 95- 8 87-25 92-28 94-25 65-29 72- 5 85-18 72- 5 MONTHLY TOTAL PRECIPITATION IN MM. 40.7 39.9 68.3 55.0 35.2 3.1 1.1 1.0 1.4 28.9 41.6 45.5 361.7 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 41.2 25.8 0.9 32.1 NO. OF DAYS WITH PRECIPITATION. 6 6 7 6 4 0 0 0 0 3 4 6 42 NO. OF DAYS PRECIPITATION EQUAL 6 6 7 6 4 0 0 0 0 3 4 6 42 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 3 2 1 0 0 0 0 1 1 2 12 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 58 60 64 61 53 45 42 43 45 54 63 58 54 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 58 57 52 44 38 32 30 30 30 35 47 56 42 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 60 59 56 49 41 32 30 31 31 40 53 59 45 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 23 20 11 1 0 0 0 0 0 0 6 17 78 OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 1 0 0 0 0 0 1 OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 6 4 0 0 0 0 0 0 0 0 0 2 12 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 9 25 24 6 0 0 0 64 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 26 21 7 0 0 0 0 0 3 16 25 127 DATE OF START AND END FREEZING START = 17 SEP. END = 7 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION SHAMSABAD-ARAK LATITUDE 33 49 N DATA PROCESSING CENTER LONGITUDE 49 44 E ELEVATION 2400 MET. MEAN AND EXTREMES FOR THE PERIOD 1964 TO 2003 PAGE 2 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE DRY BULB TEMPERATURE. IN C. -1.9 -0.6 4.3 10.3 15.8 21.7 25.4 24.5 19.4 13.2 6.6 1.1 11.7 AVERAGE DEW POINT TEMPERATURE. IN C. -9.2 -7.7 -4.1 -0.3 2.2 4.3 6.5 5.9 2.0 -0.7 -2.8 -7.0 -0.9 AVERAGE OF MIXING RATIO IN G/KG 2.91 3.19 3.97 5.16 6.26 7.51 8.70 8.61 6.41 5.11 4.32 3.35 5.46 AVERAGE OF VAPOUR PRESSURE HPA 3.51 3.86 4.81 6.28 7.65 9.18 10.65 10.53 7.84 6.23 5.25 4.05 6.65 AVERAGE OF SATURATION DEFICIT IN HPA 2.47 2.61 4.04 6.87 11.14 17.89 22.98 21.60 16.11 9.93 5.04 3.12 10.32 AVERAGE RELATIVE HUMIDITY IN PERCENT 59 60 58 51 44 36 33 35 35 43 54 58 47 AVERAGE OF MAXIMUM RELATIVE HUMIDITY(%) 71 72 71 64 56 47 43 45 47 56 67 70 59 AVERAGE OF MINIMUM RELATIVE HUMIDITY(%) 47 48 46 41 35 28 27 28 27 33 43 45 37 NO. OF DAYS PRECIPITATION EQUAL 3 3 4 4 2 0 0 0 0 2 3 3 24 OR MORE THAN 5 MM.