IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 1 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. AVERAGE OF MEAN DAILY TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MAX-MIN 1995 ****** ****** ****** ****** ****** ****** 22.2 22.4 16.5 9.3 3.8 -2.7 ****** 1996 -4.8 -1.1 0.8 7.6 14.3 17.5 20.9 20.9 17.0 10.7 4.5 2.8 25.7 1997 -3.3 -6.1 1.0 8.0 13.2 18.7 22.1 22.7 15.7 11.7 4.3 0.3 28.8 1998 -6.4 -5.7 1.8 10.1 13.8 20.3 21.3 22.4 17.3 10.4 7.6 3.6 28.8 1999 -1.3 1.5 2.9 8.8 14.5 19.0 20.2 22.8 16.5 11.4 3.4 0.5 24.1 2000 -2.4 -3.8 3.0 11.3 15.1 18.8 21.7 21.9 17.3 9.6 3.4 0.6 25.7 2001 -1.9 -0.0 6.0 10.8 13.8 18.9 20.9 22.0 17.1 11.0 4.9 3.3 23.9 2002 -4.4 -1.1 5.5 9.1 12.9 17.7 21.3 21.2 17.7 13.4 4.4 -4.0 25.7 2003 -1.4 -0.6 2.8 10.6 12.7 17.7 21.9 21.5 16.8 13.3 3.3 -0.9 23.3 MEAN -3.3 -2.1 3.0 9.5 13.8 18.6 21.4 22.0 16.9 11.2 4.4 0.4 25.3 SD 1.83 2.76 1.91 1.35 0.82 0.93 0.65 0.66 0.59 1.44 1.31 2.63 1.41 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 2 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. AVERAGE OF MINIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 ****** ****** ****** ****** ****** ****** 14.2 12.3 6.8 0.2 -5.4 -10.1 ****** 1996 -10.1 -5.3 -4.2 2.1 6.4 9.4 12.8 11.3 6.6 2.5 -2.5 -3.0 2.2 1997 -9.9 -13.8 -4.2 0.4 5.1 9.7 14.1 13.1 6.4 2.8 -1.1 -4.2 1.5 1998 -12.4 -11.1 -4.0 2.9 6.1 11.9 13.2 14.2 8.3 1.0 -0.0 -2.8 2.3 1999 -6.6 -5.2 -5.1 0.9 4.8 9.2 12.6 13.9 6.9 2.4 -2.4 -5.7 2.1 2000 -7.3 -10.7 -3.8 3.6 6.4 9.7 13.0 13.7 8.3 2.5 -1.8 -3.2 2.5 2001 -7.1 -5.9 -2.2 2.0 4.6 9.8 13.3 12.9 7.8 3.1 -1.1 -1.1 3.0 2002 -10.7 -7.2 -2.3 3.6 4.6 8.2 13.1 12.1 5.9 3.9 -2.2 -9.2 1.7 2003 -6.5 -5.0 -3.1 3.5 4.1 8.8 13.4 13.0 7.3 3.9 -3.5 -5.4 2.5 MEAN -8.8 -8.0 -3.6 2.4 5.3 9.6 13.3 12.9 7.2 2.5 -2.2 -5.0 2.1 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 3 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. AVERAGE OF MAXIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 ****** ****** ****** ****** ****** ****** 30.2 32.5 26.2 18.4 13.0 4.7 ****** 1996 0.4 3.1 5.7 13.2 22.1 25.7 29.0 30.5 27.4 18.3 11.4 8.5 16.3 1997 3.4 2.0 6.3 15.6 21.3 27.7 30.1 32.2 25.0 20.7 9.7 4.7 16.6 1998 -0.5 -0.2 7.6 17.5 21.5 28.7 29.4 30.7 26.4 19.9 15.1 10.1 17.2 1999 3.9 8.2 11.0 16.8 24.2 28.7 27.9 31.6 26.1 20.4 9.2 6.8 17.9 2000 2.3 3.1 9.8 19.0 23.7 27.9 30.4 30.2 26.3 16.7 8.7 4.4 16.9 2001 3.2 5.9 14.2 19.7 22.9 28.1 28.6 31.0 26.4 19.0 11.0 7.7 18.1 2002 1.8 5.1 13.2 14.6 21.2 27.1 29.6 30.3 29.5 22.9 11.0 1.1 17.3 2003 3.8 3.8 8.6 17.6 21.4 26.6 30.5 30.1 26.3 22.6 10.2 3.7 17.1 MEAN 2.3 3.9 9.6 16.7 22.3 27.6 29.5 31.0 26.6 19.9 11.0 5.7 17.2 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 4 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 ****** ****** ****** ****** ****** ****** 16.0 20.2 19.4 18.2 18.4 14.8 ****** 1996 10.5 8.4 9.9 11.1 15.7 16.3 16.2 19.2 20.8 15.8 13.9 11.5 14.1 1997 13.3 15.8 10.5 15.2 16.2 18.0 16.0 19.1 18.6 17.9 10.8 8.9 15.0 1998 11.9 10.9 11.6 14.6 15.4 16.8 16.2 16.5 18.1 18.9 15.1 12.9 14.9 1999 10.5 13.4 16.1 15.9 19.4 19.5 15.3 17.7 19.2 18.0 11.6 12.5 15.8 2000 9.6 13.8 13.6 15.4 17.3 18.2 17.4 16.5 18.0 14.2 10.5 7.6 14.3 2001 10.3 11.8 16.4 17.7 18.3 18.3 15.3 18.1 18.6 15.9 12.1 8.8 15.1 2002 12.5 12.3 15.5 11.0 16.6 18.9 16.5 18.2 23.6 19.0 13.2 10.3 15.6 2003 10.3 8.8 11.7 14.1 17.3 17.8 17.1 17.1 19.0 18.7 13.7 9.1 14.6 MEAN 11.1 11.9 13.2 14.4 17.0 18.0 16.2 18.1 19.5 17.4 13.3 10.7 15.1 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 5 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 03 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 ****** ****** ****** ****** ****** ****** 9.59 9.10 5.12 3.75 2.68 2.06 ****** 1996 2.34 3.15 3.37 4.90 6.93 7.06 8.25 6.82 5.42 4.50 3.62 3.23 4.96 1997 1.97 1.80 3.17 4.24 6.17 7.83 9.21 7.23 5.11 4.26 3.95 3.27 4.85 1998 2.14 2.18 3.42 5.07 6.79 7.40 8.77 8.49 6.92 3.96 3.84 3.59 5.22 1999 2.80 3.01 3.09 4.43 5.31 6.42 8.04 8.21 5.84 3.99 3.57 3.13 4.82 2000 2.41 2.03 3.11 4.90 5.51 5.98 7.31 7.56 6.24 4.76 3.89 3.05 4.73 2001 2.59 3.01 3.39 4.25 5.20 6.36 8.42 7.19 5.35 4.72 3.96 3.99 4.87 2002 2.18 2.62 3.41 5.13 5.71 5.85 8.54 7.67 4.53 4.36 3.71 2.72 4.70 2003 2.70 3.22 3.77 4.98 5.97 7.38 8.76 7.92 5.86 4.42 3.48 3.19 5.14 MEAN 2.40 2.63 3.35 4.74 5.95 6.79 8.55 7.80 5.60 4.31 3.64 3.14 4.90 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 6 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 09 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 ****** ****** ****** ****** ****** ****** 12.16 10.03 5.52 4.30 3.44 3.01 ****** 1996 3.16 3.79 3.80 4.82 7.70 6.32 7.90 6.64 4.20 5.16 5.41 5.03 5.33 1997 2.98 3.26 3.55 4.24 5.12 5.84 7.81 6.48 4.41 4.74 4.65 3.89 4.75 1998 2.98 2.99 4.18 4.32 6.08 6.40 8.41 6.95 7.86 3.83 4.52 4.27 5.23 1999 3.63 3.52 2.91 4.03 3.98 5.17 7.66 6.94 5.23 4.18 4.05 3.66 4.58 2000 3.07 3.48 3.33 4.71 4.41 5.04 6.31 6.50 5.92 4.88 4.30 4.22 4.68 2001 3.22 3.48 3.61 3.84 4.45 5.41 7.92 5.83 5.59 4.83 3.98 4.30 4.70 2002 3.52 3.86 3.27 5.09 5.05 4.70 7.16 6.83 4.17 4.27 4.05 3.72 4.64 2003 3.72 3.49 3.96 4.96 5.15 6.40 8.09 7.50 5.85 4.69 3.69 4.38 5.16 MEAN 3.29 3.49 3.58 4.51 5.25 5.66 8.16 7.08 5.42 4.54 4.24 4.06 4.94 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 7 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. MONTHLY MEAN OF MIXING RATIO AT HOUR 15 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 ****** ****** ****** ****** ****** ****** 12.78 10.65 6.07 4.53 3.21 2.68 ****** 1996 2.81 3.75 3.95 4.92 7.32 6.84 8.19 6.53 5.19 4.78 4.69 3.97 5.24 1997 2.71 2.78 3.70 3.93 5.80 6.62 8.45 6.87 5.14 4.87 4.61 3.85 4.95 1998 2.59 2.83 3.99 4.77 6.50 6.65 9.00 8.18 7.84 4.25 4.57 4.28 5.46 1999 3.54 3.41 2.97 4.19 4.44 5.35 8.33 7.90 5.94 4.23 4.03 3.61 4.83 2000 2.81 3.18 3.59 5.11 5.11 5.72 6.88 7.62 6.49 5.49 4.51 4.11 5.05 2001 2.96 3.37 3.66 4.42 4.95 5.78 8.33 6.87 6.08 5.25 4.16 4.26 5.01 2002 3.04 3.66 3.39 4.97 5.49 5.23 8.76 7.58 4.61 4.93 4.18 3.04 4.91 2003 3.42 3.51 3.90 5.24 6.01 7.10 8.33 8.09 6.30 4.86 4.35 4.06 5.43 MEAN 2.99 3.32 3.65 4.70 5.71 6.17 8.79 7.82 5.97 4.81 4.26 3.77 5.16 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 8 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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 1995 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** 9.0 1 8.0 23 0.0 30 -5.2 20 -15.0 30 -17.6 21 ***** 1996 -22.6 22 -16.6 6 -12.6 1 -4.4 5 1.4 2 3.6 7 6.0 16 5.0 31 2.0 7 -5.4 28 -9.0 18 -11.4 1 -22.6 1997 -36.4 29 -26.4 6 -11.2 9 -7.2 13 -0.6 6 5.2 14 10.2 8 8.8 31 2.0 16 -3.0 25 -7.0 28 -12.6 28 -36.4 1998 -25.8 10 -25.6 17 -19.8 3 -3.4 25 -0.4 5 7.0 2 4.0 26 10.0 6 3.8 26 -4.0 25 -5.8 6 -14.6 5 -25.8 1999 -13.4 4 -9.6 23 -12.0 6 -5.0 19 -1.8 22 5.0 5 6.8 28 10.0 4 -0.2 29 -5.2 14 -11.6 30 -22.6 4 -22.6 2000 -17.2 8 -28.8 9 -12.8 16 -3.2 2 1.6 13 2.0 14 5.0 23 8.8 29 2.4 27 -2.2 30 -7.4 29 -11.4 29 -28.8 2001 -18.4 28 -11.8 1 -9.8 12 -2.2 13 0.0 6 2.2 2 8.6 19 7.2 14 4.8 10 -3.4 21 -21.0 20 -11.4 22 -21.0 2002 -25.6 28 -17.8 5 -11.6 7 -2.2 1 0.0 1 2.8 8 10.0 2 7.6 23 2.4 8 -2.4 23 -8.6 22 -24.2 24 -25.6 2003 -19.8 1 -16.0 18 -12.4 1 -6.0 2 -4.2 2 3.0 1 9.8 2 10.2 12 3.0 10 -0.2 22 -10.2 23 -16.4 12 -19.8 LOW. -36.4 29 -28.8 9 -19.8 3 -7.2 13 -4.2 2 2.0 14 4.0 26 5.0 31 -0.2 29 -5.4 28 -21.0 20 -24.2 24 -36.4 YEAR 1997 2000 1998 1997 2003 2000 1998 1996 1999 1996 2001 2002 1997 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 9 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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 1995 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** 35.6 16 35.6 7 31.6 8 27.0 3 18.0 1 10.2 30 ***** 1996 10.0 1 12.8 25 17.4 30 20.2 21 27.4 31 32.0 4 33.5 19 35.0 22 31.2 15 22.6 7 17.0 5 15.0 29 35.0 1997 12.4 6 8.8 18 13.8 31 26.8 26 28.2 28 31.4 26 35.6 29 37.0 14 30.6 1 25.4 2 15.2 17 11.8 8 37.0 1998 4.4 25 6.8 7 16.4 24 24.6 13 27.8 9 35.0 28 36.2 25 35.6 29 33.6 2 26.2 5 19.2 22 18.0 10 36.2 1999 9.2 15 13.4 26 18.2 31 23.2 30 31.0 31 33.6 21 33.6 4 34.6 1 31.0 3 26.6 1 15.4 19 16.8 31 34.6 2000 15.6 1 9.4 24 16.0 31 23.8 16 29.6 26 35.2 23 34.0 1 34.6 3 32.2 8 22.2 11 13.4 3 8.4 31 35.2 2001 9.4 10 13.8 28 21.2 30 25.4 5 29.8 16 35.6 26 35.0 10 37.4 2 30.0 2 25.0 5 20.6 6 13.4 30 37.4 2002 11.6 3 11.4 26 20.0 13 25.0 28 34.0 27 32.0 27 34.0 13 35.2 10 33.4 3 28.4 1 17.4 10 9.2 8 35.2 2003 10.6 12 8.4 8 17.0 25 26.0 6 25.6 16 32.0 22 36.2 17 36.4 12 32.6 6 27.0 11 19.8 5 10.8 18 36.4 HIG. 15.6 1 13.8 28 21.2 30 26.8 26 34.0 27 35.6 26 36.2 25 37.4 2 33.6 2 28.4 1 20.6 6 18.0 10 37.4 YEAR 2000 2001 2001 1997 2002 2001 1998 2001 1998 2002 2001 1998 2001 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 10 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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 1995 ***** ** ***** ** ***** ** ***** ** ***** ** ***** ** 7.5 25 0.0 ** 0.0 ** 1.0 25 0.8 11 0.7 12 ***** 1996 5.4 6 7.0 11 9.1 21 11.5 21 17.3 9 0.0 ** 7.0 9 7.6 30 6.0 1 4.0 30 3.8 7 0.8 11 17.3 1997 5.6 27 10.0 19 7.0 29 14.8 5 6.3 30 11.9 6 14.0 5 0.0 ** 0.8 9 8.6 21 19.5 3 11.9 9 19.5 1998 13.4 29 10.9 27 39.8 17 14.8 4 10.8 24 0.0 ** 7.3 30 6.5 1 3.1 14 2.2 11 7.8 12 10.2 4 39.8 1999 4.1 21 10.4 18 9.9 21 13.3 2 5.0 10 2.8 9 25.2 15 7.3 18 1.0 26 6.2 25 12.5 8 4.8 3 25.2 2000 12.4 6 2.7 14 24.8 24 22.8 21 2.8 9 0.0 ** 4.8 5 0.0 ** 3.4 3 11.0 3 13.0 2 8.6 15 24.8 2001 3.0 4 5.4 11 10.0 9 10.0 9 6.6 2 2.0 16 14.0 21 0.0 ** 0.0 ** 7.3 26 21.5 12 5.9 4 21.5 2002 8.0 29 11.5 14 22.5 18 21.9 2 15.1 4 0.0 ** 4.5 9 0.0 ** 0.0 ** 1.5 15 14.0 1 9.7 9 22.5 2003 4.0 16 3.3 25 18.5 26 25.6 16 11.0 30 9.5 1 0.0 ** 5.5 21 0.0 ** 1.6 29 13.7 11 11.9 4 25.6 HIG. 13.4 29 11.5 14 39.8 17 25.6 16 17.3 9 11.9 6 25.2 15 7.6 30 6.0 1 11.0 3 21.5 12 11.9 9 39.8 YEAR 1998 2002 1998 2003 1996 1997 1999 1996 1996 2000 2001 1997 1998 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 11 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. MONTHLY TOTAL PRECIPITATION WITH SEASONAL PERCENT. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL SEASONAL-PERCENT ----------------------- 1995 ****** ****** ****** ****** ****** ****** 7.5 0.0 0.0 1.0 1.8 1.0 ****** ***** ***** 66.4 33.6 1996 19.8 35.3 34.9 61.1 35.2 0.0 21.7 8.2 6.4 9.0 7.2 1.6 240.4 37.4 40.1 15.1 7.4 1997 12.7 12.5 22.8 24.7 29.4 26.3 17.0 0.0 0.8 15.8 36.2 43.5 241.7 19.9 33.3 7.4 39.5 1998 49.9 31.4 92.5 40.3 37.0 0.0 12.5 6.5 4.2 3.7 26.6 15.6 320.2 54.3 24.1 7.2 14.3 1999 11.3 24.3 19.7 27.9 13.3 2.8 30.6 13.2 1.8 16.7 21.2 15.9 198.7 27.8 22.1 22.9 27.1 2000 43.4 10.0 56.3 35.6 6.4 0.0 8.6 0.0 11.8 26.4 35.8 29.0 263.3 41.7 16.0 7.7 34.6 2001 7.2 10.8 33.2 29.5 10.6 2.0 31.0 0.0 0.0 21.3 35.0 22.0 202.6 25.3 20.8 15.3 38.6 2002 31.2 17.3 45.3 77.1 22.9 0.0 14.0 0.0 0.0 4.5 36.3 34.5 283.1 33.1 35.3 4.9 26.6 2003 8.0 11.8 39.9 67.6 39.8 10.5 0.0 5.5 0.0 4.4 38.3 40.0 265.8 22.5 44.4 2.1 31.1 MEAN 22.9 19.2 43.1 45.5 24.3 5.2 15.9 3.7 2.8 11.4 26.5 22.6 243.1 35.1 30.9 9.2 24.9 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 12 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. NO. OF DAYS WITH PRECIPITATION YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 *** *** *** *** *** *** 4 0 1 4 6 2 *** 1996 10 14 14 13 11 0 7 2 2 4 4 3 84 1997 4 4 12 6 11 7 3 0 1 4 6 7 65 1998 13 8 9 6 9 0 2 1 2 2 5 5 62 1999 5 8 5 6 5 1 3 4 2 5 6 7 57 2000 14 5 6 4 4 0 3 0 5 7 8 11 67 2001 6 4 6 6 2 1 5 0 0 4 4 7 45 2002 8 6 11 12 5 0 5 0 0 3 6 12 68 2003 2 7 10 13 11 2 0 1 0 4 8 15 73 MEAN 8 7 9 8 7 1 4 1 1 4 6 8 64 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 13 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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 1995 *** *** *** *** *** *** 1 0 0 1 0 0 *** 1996 6 11 8 11 9 0 7 1 1 3 3 0 60 1997 2 3 7 5 9 6 2 0 0 4 5 6 49 1998 11 7 7 6 6 0 2 1 2 2 5 4 53 1999 4 5 3 4 4 1 2 3 1 3 4 5 39 2000 9 5 5 3 3 0 3 0 5 7 5 8 53 2001 3 4 6 6 2 1 3 0 0 4 4 7 40 2002 8 4 10 10 4 0 5 0 0 3 6 10 60 2003 2 5 7 13 11 2 0 1 0 2 7 9 59 MEAN 6 6 7 7 6 1 3 1 1 3 4 5 50 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 14 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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 1995 *** *** *** *** *** *** 0 0 0 0 0 0 *** 1996 0 0 0 2 1 0 0 0 0 0 0 0 3 1997 0 1 0 1 0 1 1 0 0 0 1 3 8 1998 1 1 2 2 1 0 0 0 0 0 0 1 8 1999 0 1 0 1 0 0 1 0 0 0 1 0 4 2000 1 0 3 1 0 0 0 0 0 1 2 0 8 2001 0 0 1 1 0 0 2 0 0 0 1 0 5 2002 0 1 1 3 1 0 0 0 0 0 2 0 8 2003 0 0 1 1 1 0 0 0 0 0 1 1 5 MEAN 0 1 1 2 1 0 0 0 0 0 1 1 7 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 15 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 03 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 *** *** *** *** *** *** 69 74 64 72 69 79 *** 1996 85 85 85 81 84 65 61 59 65 69 82 71 74 1997 69 76 83 76 74 69 65 57 65 70 83 88 73 1998 83 83 83 80 81 59 67 63 76 73 76 81 75 1999 87 84 84 76 66 56 62 62 70 64 85 86 74 2000 79 77 79 74 62 53 55 57 69 80 88 76 71 2001 84 87 76 71 64 55 65 57 62 74 83 84 72 2002 78 82 76 79 75 54 65 65 58 67 85 86 73 2003 82 88 88 75 75 67 64 61 70 64 83 84 75 MEAN 81 83 82 77 73 60 64 62 67 70 82 82 74 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 16 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 09 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 *** *** *** *** *** *** 41 31 26 32 33 52 *** 1996 71 73 64 49 45 30 30 24 18 42 61 65 48 1997 60 68 56 39 31 24 30 20 23 30 57 66 42 1998 78 72 61 37 36 24 31 24 35 27 44 54 44 1999 66 50 36 34 21 21 32 23 24 29 53 58 37 2000 67 69 45 33 23 22 22 24 27 41 56 73 42 2001 64 58 39 27 26 23 33 20 27 35 49 61 39 2002 77 70 36 49 34 21 27 24 15 23 47 81 42 2003 72 64 55 47 32 28 29 26 26 27 45 80 44 MEAN 69 66 49 39 31 24 31 24 25 32 49 66 42 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 17 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. MONTHLY MEAN OF RELATIVE HUMIDITY AT HOUR 15 YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 *** *** *** *** *** *** 51 39 35 43 43 63 *** 1996 78 78 73 57 49 36 38 29 28 43 65 65 53 1997 66 72 69 39 44 34 37 27 34 42 69 77 51 1998 84 79 67 43 45 30 40 36 45 39 57 73 53 1999 78 59 44 40 29 25 42 33 35 37 64 72 47 2000 75 75 52 41 31 28 31 33 39 58 72 87 52 2001 75 68 45 36 32 29 41 30 33 48 63 73 48 2002 81 75 45 54 41 26 39 35 22 38 62 81 50 2003 78 75 64 52 45 37 36 37 38 34 61 84 53 MEAN 77 73 57 45 40 31 39 33 34 42 62 75 51 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 18 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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 1995 *** *** *** *** *** *** 0 0 0 5 20 28 *** 1996 25 17 16 2 0 0 0 0 0 2 12 14 88 1997 24 24 14 5 0 0 0 0 0 0 8 15 90 1998 23 23 12 0 0 0 0 0 0 1 2 9 70 1999 21 19 20 3 0 0 0 0 0 1 10 20 94 2000 21 23 16 0 0 0 0 0 0 0 12 9 81 2001 24 20 15 0 0 0 0 0 0 0 6 6 71 2002 23 20 14 0 0 0 0 0 0 0 12 22 91 2003 17 17 11 1 1 0 0 0 0 0 16 17 80 MEAN 22 20 15 1 0 0 0 0 0 1 11 16 86 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 19 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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 1995 *** *** *** *** *** *** 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 1 1 0 0 0 0 2 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 1 0 0 0 0 1 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 20 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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 1995 *** *** *** *** *** *** 0 0 0 0 0 5 *** 1996 16 8 2 1 0 0 0 0 0 0 0 0 27 1997 10 7 2 0 0 0 0 0 0 0 0 1 20 1998 18 15 2 0 0 0 0 0 0 0 0 0 35 1999 3 0 0 0 0 0 0 0 0 0 1 2 6 2000 11 3 1 0 0 0 0 0 0 0 0 0 15 2001 7 0 0 0 0 0 0 0 0 0 1 0 8 2002 12 3 0 0 0 0 0 0 0 0 0 15 30 2003 5 3 2 0 0 0 0 0 0 0 0 3 13 MEAN 10 5 1 0 0 0 0 0 0 0 0 3 19 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 21 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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 1995 *** *** *** *** *** *** 18 26 4 0 0 0 *** 1996 0 0 0 0 0 2 16 23 8 0 0 0 49 1997 0 0 0 0 0 6 19 25 2 0 0 0 52 1998 0 0 0 0 0 11 15 19 2 0 0 0 47 1999 0 0 0 0 1 10 10 24 5 0 0 0 50 2000 0 0 0 0 0 12 21 17 3 0 0 0 53 2001 0 0 0 0 0 12 13 21 2 0 0 0 48 2002 0 0 0 0 1 6 15 19 10 0 0 0 51 2003 0 0 0 0 0 5 20 14 6 0 0 0 45 MEAN 0 0 0 0 0 8 16 21 5 0 0 0 50 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 22 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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 1995 *** *** *** *** *** *** 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 KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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 1995 *** *** *** *** *** *** 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 KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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 -------------- 1995 *** *** *** *** *** *** 0 0 1 15 23 31 *** 9 30 12 31 1996 30 27 30 12 0 0 0 0 0 8 22 21 150 10 1 4 29 1997 29 27 28 13 1 0 0 0 0 8 17 28 151 10 4 5 6 1998 30 26 22 8 1 0 0 0 0 15 16 23 141 10 12 5 5 1999 31 24 28 12 3 0 0 0 1 6 22 25 152 9 29 5 23 2000 25 28 27 5 0 0 0 0 0 7 19 26 137 10 5 4 17 2001 31 27 22 10 1 0 0 0 0 8 21 23 143 10 3 5 6 2002 26 23 21 5 1 0 0 0 0 6 21 28 131 10 7 5 1 2003 27 25 25 8 7 0 0 0 0 1 24 24 141 10 22 5 30 MEAN 29 26 25 9 2 0 0 0 0 8 21 25 145 9 29 5 30 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 25 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 ****** ****** ****** ****** ****** ****** 23.2 23.9 17.6 10.1 4.6 -2.1 ****** 1996 -4.4 -0.6 1.0 8.0 15.6 19.3 22.3 22.3 18.5 11.1 4.8 3.4 10.1 1997 -3.3 -5.9 1.1 9.2 14.6 20.5 23.1 24.2 16.4 12.3 4.4 0.2 9.7 1998 -6.6 -5.3 2.3 10.8 14.9 22.1 22.4 23.2 18.1 11.2 7.5 3.5 10.3 1999 -1.3 1.9 3.8 9.8 16.5 21.4 21.4 23.7 17.7 12.5 3.5 0.4 10.9 2000 -3.1 -3.4 3.6 12.2 16.8 20.7 23.0 22.9 18.0 9.7 3.3 0.1 10.3 2001 -2.4 0.3 6.5 12.1 15.9 20.9 21.7 23.0 17.9 11.4 4.8 3.1 11.3 2002 -4.6 -1.0 5.7 9.1 14.3 20.0 22.4 22.3 19.4 14.1 4.6 -4.1 10.2 2003 -1.5 -0.5 2.9 10.1 14.0 19.6 23.1 22.7 17.6 14.6 4.3 -0.5 10.5 MEAN -3.4 -1.8 3.4 10.2 15.3 20.6 22.5 23.1 17.9 11.9 4.6 0.5 10.4 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 26 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 ****** ****** ****** ****** ****** ****** 12.4 10.0 2.2 -2.0 -7.0 -8.5 ****** 1996 -8.0 -4.1 -3.6 0.1 5.9 4.7 7.4 4.2 -0.0 -0.5 -1.1 -2.8 0.2 1997 -9.3 -9.9 -4.6 -2.3 2.3 4.6 8.1 5.0 -0.1 -0.6 -1.3 -3.7 -1.0 1998 -9.3 -8.7 -3.3 -0.4 4.2 4.9 8.1 7.0 6.1 -2.7 -1.9 -2.6 0.1 1999 -5.2 -5.2 -6.7 -2.0 -0.7 2.2 7.3 6.5 2.1 -2.3 -2.9 -4.9 -1.0 2000 -7.9 -7.8 -5.4 -0.5 0.5 2.1 4.8 5.2 3.3 0.7 -1.8 -3.6 -0.9 2001 -6.9 -5.3 -4.3 -2.2 -0.2 2.5 7.7 4.3 2.3 -0.1 -2.7 -2.1 -0.6 2002 -8.0 -5.1 -5.6 0.7 1.7 1.0 7.5 5.9 -1.2 -0.9 -2.8 -6.7 -1.1 2003 -5.4 -4.8 -3.3 0.4 2.0 5.3 8.0 7.1 3.1 -0.6 -3.4 -3.2 0.4 MEAN -7.5 -6.4 -4.6 -0.8 2.0 3.4 7.9 6.1 2.0 -1.0 -2.8 -4.2 -0.5 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 27 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 ****** ****** ****** ****** ****** ****** 11.51 9.93 5.57 4.19 3.11 2.58 ****** 1996 2.77 3.56 3.71 4.88 7.32 6.74 8.11 6.66 4.94 4.81 4.57 4.07 5.18 1997 2.59 2.66 3.48 4.14 5.69 6.77 8.49 6.86 4.89 4.62 4.40 3.67 4.86 1998 2.57 2.67 3.86 4.72 6.46 6.82 8.73 7.87 7.54 4.01 4.31 4.05 5.30 1999 3.32 3.31 2.99 4.22 4.58 5.65 8.01 7.68 5.67 4.13 3.88 3.47 4.74 2000 2.81 2.90 3.34 4.91 5.01 5.58 6.83 7.23 6.22 5.04 4.23 3.79 4.82 2001 2.92 3.29 3.55 4.17 4.87 5.85 8.22 6.63 5.67 4.93 4.03 4.18 4.86 2002 2.91 3.38 3.36 5.06 5.42 5.26 8.15 7.36 4.43 4.52 3.98 3.16 4.75 2003 3.28 3.40 3.88 5.06 5.71 6.96 8.39 7.84 6.00 4.66 3.84 3.88 5.24 MEAN 2.90 3.15 3.52 4.65 5.63 6.20 8.49 7.56 5.66 4.55 4.04 3.65 5.00 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 28 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. AVERAGE OF VAPOUR PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 ****** ****** ****** ****** ****** ****** 15.03 13.01 7.33 5.50 4.07 3.37 ****** 1996 3.60 4.64 4.84 6.39 9.58 8.85 10.66 8.77 6.50 6.30 5.97 5.32 6.78 1997 3.38 3.46 4.53 5.42 7.47 8.89 11.14 9.04 6.42 6.07 5.75 4.78 6.36 1998 3.34 3.47 5.04 6.19 8.46 8.97 11.44 10.35 9.89 5.26 5.64 5.29 6.95 1999 4.33 4.32 3.91 5.53 6.02 7.44 10.51 10.10 7.45 5.43 5.07 4.52 6.22 2000 3.66 3.77 4.37 6.44 6.59 7.35 8.99 9.50 8.16 6.60 5.52 4.94 6.32 2001 3.81 4.28 4.65 5.48 6.39 7.70 10.79 8.73 7.46 6.46 5.27 5.46 6.37 2002 3.79 4.40 4.39 6.63 7.11 6.93 10.70 9.67 5.85 5.94 5.20 4.11 6.23 2003 4.27 4.44 5.06 6.62 7.48 9.14 11.02 10.30 7.88 6.12 5.02 5.05 6.87 MEAN 3.77 4.10 4.60 6.09 7.39 8.16 11.14 9.94 7.44 5.96 5.28 4.76 6.55 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 29 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. AVERAGE OF SATURATION DEFICIT PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 ****** ****** ****** ****** ****** ****** 14.98 19.34 15.20 8.38 5.63 2.34 ****** 1996 1.20 1.53 2.03 5.02 9.36 14.86 17.51 20.35 17.13 7.89 3.24 2.85 8.58 1997 2.20 1.26 2.48 7.56 10.22 16.75 18.92 23.86 14.17 9.72 2.97 1.67 9.32 1998 0.73 1.06 2.74 7.91 9.73 19.17 17.09 19.95 12.84 9.69 5.55 3.13 9.13 1999 1.50 3.12 4.90 7.53 14.47 19.70 16.30 21.07 14.92 10.70 3.37 2.31 9.99 2000 1.72 1.45 4.21 8.75 13.76 19.08 21.01 20.15 14.28 6.34 2.53 1.40 9.56 2001 1.65 2.25 6.04 9.87 13.12 19.25 16.66 21.66 14.96 8.14 4.13 2.45 10.02 2002 1.18 1.75 5.67 5.59 10.59 17.98 17.93 19.43 19.74 12.17 4.06 0.87 9.75 2003 1.58 1.68 2.83 6.75 9.56 14.97 18.95 18.81 14.23 12.14 3.92 1.16 8.88 MEAN 1.47 1.76 3.86 7.37 11.35 17.72 17.71 20.51 15.27 9.46 3.93 2.02 9.37 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 30 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. AVERAGE OF RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 *** *** *** *** *** *** 54 48 42 49 48 64 *** 1996 78 79 74 62 59 44 43 38 37 51 69 67 58 1997 65 72 69 52 50 42 44 35 41 47 70 77 55 1998 82 78 71 53 54 38 46 41 52 46 59 70 58 1999 77 64 55 50 38 34 45 39 43 44 67 72 52 2000 74 74 59 49 39 34 36 38 45 59 72 79 55 2001 74 71 53 45 40 36 46 36 41 52 65 72 53 2002 79 76 52 61 50 33 44 41 31 43 65 83 55 2003 77 76 69 58 51 44 43 41 45 41 63 82 58 MEAN 76 74 63 54 48 38 45 40 42 48 64 74 56 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 31 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. AVERAGE OF MAXIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 *** *** *** *** *** *** 70 74 65 73 69 80 *** 1996 87 89 88 82 85 65 61 60 65 72 86 81 77 1997 78 81 86 78 75 70 66 57 65 70 84 89 75 1998 89 85 86 81 81 59 68 63 76 73 78 85 77 1999 90 87 86 77 67 56 63 62 70 65 85 88 75 2000 86 86 82 76 63 54 55 59 69 82 90 91 74 2001 86 89 80 71 67 56 65 58 63 75 85 87 74 2002 89 88 78 80 76 54 67 65 58 67 86 91 75 2003 87 90 89 77 76 67 64 61 70 66 83 90 77 MEAN 87 87 84 78 74 60 64 62 67 71 83 87 75 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 32 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. AVERAGE OF MINIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1995 *** *** *** *** *** *** 40 29 26 31 31 51 *** 1996 68 69 61 45 41 28 29 22 18 36 54 51 44 1997 52 64 53 33 30 23 28 20 22 30 55 64 40 1998 75 70 60 34 34 23 30 24 33 26 40 53 42 1999 63 46 33 30 19 19 31 23 24 29 52 56 35 2000 62 62 41 31 22 21 21 22 26 40 55 63 39 2001 61 55 34 26 23 22 32 20 25 32 47 58 36 2002 68 64 34 46 32 18 26 24 14 23 46 73 39 2003 67 62 50 43 31 27 27 25 26 23 44 75 42 MEAN 65 62 46 36 29 23 29 23 24 30 47 60 40 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 33 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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 1995 *** *** *** *** *** *** 1 0 0 0 0 0 *** 1996 2 1 3 5 1 0 2 1 1 0 0 0 16 1997 2 1 1 1 3 2 1 0 0 1 2 3 17 1998 4 2 4 2 4 0 2 1 0 0 3 1 23 1999 0 1 2 2 1 0 1 1 0 2 1 0 11 2000 2 0 4 3 0 0 0 0 0 2 2 2 15 2001 0 1 3 3 1 0 2 0 0 3 2 2 17 2002 3 1 1 4 1 0 0 0 0 0 2 2 14 2003 0 0 2 4 2 1 0 1 0 0 3 3 16 MEAN 2 1 3 3 2 0 1 0 0 1 2 1 16 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 34 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. HIGHEST AND LOWEST LIMITS FOR 9 YEARS DURING 1995-2003 ELE- JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MENT --------------------------------------------------------------------------------------------- NO. HIG. DRY 03 6.0 6.2 8.2 16.0 14.0 21.2 24.4 22.6 18.4 14.0 9.8 8.0 1 YEAR - DAY 2002- 1 1996- 9 2001-24 2003- 6 1996-17 1997-28 1998-11 1999- 2 1998- 3 2003-29 1998-10 2001-30 LOW. DRY 03 -25.6 -25.4 -19.2 -5.2 -0.8 6.0 7.6 7.6 -0.2 -5.4 -19.2 -24.2 2 YEAR - DAY 1998-10 1998-17 1998- 3 1997-13 2003- 2 2000-14 1998-26 2001-14 1999-29 1996-28 2001-20 2002-24 HIG. WET 03 4.8 3.4 6.6 9.4 11.4 15.2 17.2 17.2 15.2 9.6 7.2 6.4 3 YEAR - DAY 2002- 1 2002-25 1998-29 1997-28 1998-29 1996-30 1995-31 1995-14 1998- 3 2003- 4 1996-28 1998-23 LOW. WET 03 -25.8 -25.6 -19.2 -5.8 -2.4 1.2 5.0 4.2 -1.8 -6.2 -19.4 -24.2 4 YEAR - DAY 2002-28 1998-17 1998- 3 1997-12 2003- 5 2000-14 2000-23 1996-27 1999-29 1996-28 2001-20 2002-24 HIG. DRY 09 13.8 12.0 19.0 25.6 29.8 34.0 34.2 36.6 32.0 26.8 18.8 16.6 5 YEAR - DAY 2000- 1 2001-28 2001-31 1997-25 1999-31 1998-27 2003-17 2001- 2 1998- 2 2002-10 2001- 6 1998-10 LOW. DRY 09 -12.6 -8.8 -6.4 -1.2 9.2 14.2 15.0 20.4 13.2 3.0 -6.0 -5.6 6 YEAR - DAY 1997-29 1998-21 1997- 8 1996- 4 2003- 8 2000-13 2001-11 2001-11 1997-14 1996-24 2001-19 2002-28 HIG. WET 09 6.0 5.4 10.6 13.4 18.8 18.8 27.8 22.6 18.2 18.6 12.0 9.4 7 YEAR - DAY 2002- 1 1999- 9 1998-28 2000-30 1996- 7 1998-27 1995-30 1995- 8 1998-22 2003-13 1996-26 1998-10 LOW. WET 09 -13.0 -9.4 -7.4 -3.2 4.2 6.6 9.8 11.0 8.2 0.4 -6.4 -6.2 8 YEAR - DAY 1997-29 1997- 1 1997- 8 1996- 4 2003- 8 2000-13 2001-11 1996-23 1997-14 1996-24 2001-19 2002-14 HIG. DRY 15 8.0 8.4 16.8 22.0 27.4 33.4 35.4 37.4 29.6 22.8 15.2 10.4 9 YEAR - DAY 2002- 1 1999-26 2001-31 1998-15 1996-31 2001-26 2003-17 1997-18 1998- 3 1995- 3 1998- 9 2001-29 LOW. DRY 15 -17.4 -19.8 -6.0 -3.4 5.8 11.4 13.2 16.0 10.2 2.6 -11.0 -15.0 10 YEAR - DAY 1997-28 1997- 1 1998- 2 1997-10 1998- 3 2000-12 1999-15 1996-29 1997-14 1999-26 2001-20 2002-23 HIG. WET 15 5.4 4.8 8.4 15.6 22.8 18.4 27.2 23.4 16.6 14.2 8.2 7.0 11 YEAR - DAY 2002- 1 1996- 9 1998-28 2003-26 2001-31 1996- 1 1995-30 2000-28 1998-21 1996-18 1995- 3 2001-29 LOW. WET 15 -17.8 -20.4 -6.4 -4.2 3.4 6.0 9.0 10.4 6.6 0.6 -11.2 -15.6 12 YEAR - DAY 1997-28 1997- 1 1996-16 1996- 4 2003- 1 2000-13 2000-20 2000-31 1997-14 2001-29 2001-20 2002-27 HIG. MIN. 6.0 3.2 7.2 12.6 12.4 19.0 22.6 21.0 17.8 13.2 8.8 8.0 13 YEAR - DAY 2002- 1 2002-13 2002-27 2003-26 1998-29 1996-30 1998-11 1998-25 1995- 1 2003-29 2001- 7 2001-30 LOW. MIN. -36.4 -28.8 -19.8 -7.2 -4.2 2.0 4.0 5.0 -0.2 -5.4 -21.0 -24.2 14 YEAR - DAY 1997-29 2000- 9 1998- 3 1997-13 2003- 2 2000-14 1998-26 1996-31 1999-29 1996-28 2001-20 2002-24 HIG. MAX. 15.6 13.8 21.2 26.8 34.0 35.6 36.2 37.4 33.6 28.4 20.6 18.0 15 YEAR - DAY 2000- 1 2001-28 2001-30 1997-26 2002-27 2001-26 1998-25 2001- 2 1998- 2 2002- 1 2001- 6 1998-10 LOW. MAX. -7.0 -7.8 -4.0 -0.2 10.6 15.6 18.2 22.0 14.6 7.0 -3.0 -3.8 16 YEAR - DAY 1997-29 1998-21 1997- 8 1996- 4 1998- 2 2000-13 2001-18 1996-29 1997-14 1998-10 2001-19 2002-14 HIG. PPTN 13.4 11.5 39.8 25.6 17.3 11.9 25.2 7.6 6.0 11.0 21.5 11.9 17 YEAR - DAY 1998-29 2002-14 1998-17 2003-16 1996- 9 1997- 6 1999-15 1996-30 1996- 1 2000- 3 2001-12 1997- 9 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) FORM 35 STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. HIGHEST LIMITS OF ABSOLUTE DIFFERENCES FOR 9 YEARS DURING 1995-2003 ELE- JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. MENT --------------------------------------------------------------------------------------------- NO. DRY 09 - DRY 03 24.6 20.8 23.4 21.0 20.8 20.4 20.0 23.8 25.0 24.2 24.4 23.2 18 YEAR - DAY 2002-28 2000-10 1999- 7 2001- 2 2003- 5 2001-22 2000-23 2001- 2 2002- 3 1999-14 1995-16 1999- 6 DRY 15 - DRY 09 14.0 11.6 10.0 9.4 10.6 11.2 14.4 12.4 9.6 14.8 14.2 15.6 19 YEAR - DAY 2000- 2 1997- 1 2002-17 2000-15 2000- 6 1997-11 2000-20 1999-18 2003- 9 1996-24 1998-30 1998- 9 DRY 15 - DRY 03 23.6 19.6 19.8 18.2 21.6 20.4 19.0 24.4 21.6 19.8 19.4 19.6 20 YEAR - DAY 2002-28 1997- 7 1999- 6 1998-14 1996-30 2001-22 1997-24 1997-18 2002- 3 2003- 9 1995-13 1998- 5 WET 09 - WET 03 24.8 20.0 17.6 11.8 13.4 9.6 16.4 13.3 14.2 19.0 17.8 20.6 21 YEAR - DAY 2002-28 1998-28 1998- 3 2003- 3 1996- 7 2001-22 1995-30 1996-24 1998-22 2003-13 1996-29 1999- 6 WET 15 - WET 09 10.2 11.0 6.8 5.2 12.6 5.4 9.0 11.0 6.2 8.6 8.4 12.4 22 YEAR - DAY 1998-27 1997- 1 1997-26 1999- 2 2001-31 1998-27 2002-21 2000-28 2000-30 2003-13 2001-18 2002-27 WET 15 - WET 03 23.8 19.4 16.2 11.8 19.2 11.2 15.8 15.0 12.0 15.8 14.0 20.0 23 YEAR - DAY 2002-28 1997- 7 1998- 3 1997-14 2001-31 2001-22 1995-30 2000-28 1998-23 2001-20 1996-18 1998- 5 DAY BY DAY DRY 03 23.2 20.0 21.8 10.6 9.0 9.6 10.0 10.0 10.2 14.4 16.8 17.8 24 YEAR - DAY 2002-29 1998-28 1998- 1 2000- 8 2003- 5 2002- 1 2000-23 2003-10 2001-13 1996-23 2001-21 1999- 7 DAY BY DAY WET 03 23.4 19.8 21.6 8.6 6.8 6.2 7.8 9.0 8.6 11.4 16.6 17.6 25 YEAR - DAY 2002-29 1998-28 1998- 1 2000-11 2000-10 2000-15 1998- 8 2002-24 1999- 4 2001-20 2001-21 1999- 7 DAY BY DAY DRY 09 11.2 11.2 12.4 14.0 14.4 9.8 14.6 12.2 11.0 18.4 11.0 8.4 26 YEAR - DAY 2000-28 1996-27 2000- 9 2003-25 2001-17 2003-19 2001-11 2000- 4 2001-25 1996-25 2001-19 2001-21 DAY BY DAY WET 09 10.2 8.7 9.4 9.4 7.2 5.6 7.0 7.8 4.6 9.6 10.2 8.0 27 YEAR - DAY 1997-27 2000- 7 1997- 8 1996- 3 1996- 7 2003-25 1998-23 1996-24 2002- 8 1996-17 2001-19 1996- 9 DAY BY DAY DRY 15 13.0 12.4 9.4 13.6 16.6 14.9 13.2 16.4 10.2 11.6 14.2 13.2 28 YEAR - DAY 1998-27 1997- 1 2002-17 2003-28 1999-20 1998-29 2001-11 1997-19 1995-26 2001-26 2001-21 1998-10 DAY BY DAY WET 15 12.6 12.6 7.6 11.4 12.6 11.0 11.0 10.2 5.2 10.2 11.6 12.6 29 YEAR - DAY 2002-28 1997- 1 2003-26 2003-28 2001-31 2001- 1 2002-21 2000-28 1998- 5 2001-21 2001-21 1998-10 DAY BY DAY MIN. 23.4 20.0 15.2 9.0 10.0 8.8 11.0 10.0 10.2 13.6 16.4 18.0 30 YEAR - DAY 2002-29 1997- 6 1998- 1 2002-30 2001- 2 1996-30 1998-11 2001- 3 2001-13 2001-20 1995-12 1999- 4 DAY BY DAY MAX. 8.4 11.0 11.0 13.8 12.4 12.2 11.6 9.2 11.4 13.2 9.8 8.0 31 YEAR - DAY 1997-27 1996-27 2000- 9 1996- 3 2002-27 1998-29 1998-25 2000-16 1997-13 2001- 1 1999- 1 1997- 9 IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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.***** ***** ***** ***** ***** ***** 22.2 22.4 16.5 9.3 3.8 -2.7 ****** AVERAGE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** 14.2 12.3 6.8 0.2 -5.4 -10.1 ****** AVERAGE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** 30.2 32.5 26.2 18.4 13.0 4.7 ****** DIFFERENCE BETWEEN AVERAGE MAXIMUM ***** ***** ***** ***** ***** ***** 16.0 20.2 19.4 18.2 18.4 14.8 ****** AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. ***** ***** ***** ***** ***** ***** 9.59 9.10 5.12 3.75 2.68 2.06 ***** MEAN OF MIXING RATIO AT 09 GMT. ***** ***** ***** ***** ***** ***** 12.16 10.03 5.52 4.30 3.44 3.01 ***** MEAN OF MIXING RATIO AT 15 GMT. ***** ***** ***** ***** ***** ***** 12.78 10.65 6.07 4.53 3.21 2.68 ***** ABSOLUTE OF MINIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** 9.0 8.0 0.0 -5.2 -15.0 -17.6 ****** DAY ** ** ** ** ** ** 1 23 30 20 30 21 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. ***** ***** ***** ***** ***** ***** 35.6 35.6 31.6 27.0 18.0 10.2 ****** DAY ** ** ** ** ** ** 16 7 8 3 1 30 24 HOUR MAXIMUM PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** 7.5 0.0 0.0 1.0 0.8 0.7 ****** DAY ** ** ** ** ** ** 25 ** ** 25 11 12 MONTHLY TOTAL PRECIPITATION IN MM. ***** ***** ***** ***** ***** ***** 7.5 0.0 0.0 1.0 1.8 1.0 ****** ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION ***** ***** 66.4 33.6 NO. OF DAYS WITH PRECIPITATION. *** *** *** *** *** *** 4 0 1 4 6 2 *** NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** 1 0 0 1 0 0 *** OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL *** *** *** *** *** *** 0 0 0 0 0 0 *** OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. *** *** *** *** *** *** 69 74 64 72 69 79 *** MEAN OF RELATIVE HUMIDITY AT 09 GMT. *** *** *** *** *** *** 41 31 26 32 33 52 *** MEAN OF RELATIVE HUMIDITY AT 15 GMT. *** *** *** *** *** *** 51 39 35 43 43 63 *** NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** 0 0 0 5 20 28 *** OR LESS THAN -4 NO. OF DAYS MINIMUM TEMPERATURE EQUAL *** *** *** *** *** *** 0 0 0 0 0 0 *** OR MORE THAN 21 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** 0 0 0 0 0 5 *** OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** 18 26 4 0 0 0 *** OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** 0 0 0 0 0 0 *** OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL *** *** *** *** *** *** 0 0 0 0 0 0 *** OR MORE THAN 45 NUMBER OF FREEZING DAYS. *** *** *** *** *** *** 0 0 1 15 23 31 *** DATE OF START AND END FREEZING START = 30 SEP. END = 31 DEC. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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. -4.8 -1.1 0.8 7.6 14.3 17.5 20.9 20.9 17.0 10.7 4.5 2.8 9.3 AVERAGE OF MINIMUM TEMPERATURE IN C. -10.1 -5.3 -4.2 2.1 6.4 9.4 12.8 11.3 6.6 2.5 -2.5 -3.0 2.2 AVERAGE OF MAXIMUM TEMPERATURE IN C. 0.4 3.1 5.7 13.2 22.1 25.7 29.0 30.5 27.4 18.3 11.4 8.5 16.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.5 8.4 9.9 11.1 15.7 16.3 16.2 19.2 20.8 15.8 13.9 11.5 14.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.34 3.15 3.37 4.90 6.93 7.06 8.25 6.82 5.42 4.50 3.62 3.23 4.96 MEAN OF MIXING RATIO AT 09 GMT. 3.16 3.79 3.80 4.82 7.70 6.32 7.90 6.64 4.20 5.16 5.41 5.03 5.33 MEAN OF MIXING RATIO AT 15 GMT. 2.81 3.75 3.95 4.92 7.32 6.84 8.19 6.53 5.19 4.78 4.69 3.97 5.24 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -22.6 -16.6 -12.6 -4.4 1.4 3.6 6.0 5.0 2.0 -5.4 -9.0 -11.4 -22.6 DAY 22 6 1 5 2 7 16 31 7 28 18 1 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.0 12.8 17.4 20.2 27.4 32.0 33.5 35.0 31.2 22.6 17.0 15.0 35.0 DAY 1 25 30 21 31 4 19 22 15 7 5 29 24 HOUR MAXIMUM PRECIPITATION IN MM. 5.4 7.0 9.1 11.5 17.3 0.0 7.0 7.6 6.0 4.0 3.8 0.8 17.3 DAY 6 11 21 21 9 ** 9 30 1 30 7 11 MONTHLY TOTAL PRECIPITATION IN MM. 19.8 35.3 34.9 61.1 35.2 0.0 21.7 8.2 6.4 9.0 7.2 1.6 240.4 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 37.4 40.1 15.1 7.4 NO. OF DAYS WITH PRECIPITATION. 10 14 14 13 11 0 7 2 2 4 4 3 84 NO. OF DAYS PRECIPITATION EQUAL 6 11 8 11 9 0 7 1 1 3 3 0 60 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 0 2 1 0 0 0 0 0 0 0 3 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 85 85 85 81 84 65 61 59 65 69 82 71 74 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 71 73 64 49 45 30 30 24 18 42 61 65 48 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 78 78 73 57 49 36 38 29 28 43 65 65 53 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 25 17 16 2 0 0 0 0 0 2 12 14 88 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 16 8 2 1 0 0 0 0 0 0 0 0 27 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 2 16 23 8 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. 30 27 30 12 0 0 0 0 0 8 22 21 150 DATE OF START AND END FREEZING START = 1 OCT. END = 29 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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. -3.3 -6.1 1.0 8.0 13.2 18.7 22.1 22.7 15.7 11.7 4.3 0.3 9.0 AVERAGE OF MINIMUM TEMPERATURE IN C. -9.9 -13.8 -4.2 0.4 5.1 9.7 14.1 13.1 6.4 2.8 -1.1 -4.2 1.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.4 2.0 6.3 15.6 21.3 27.7 30.1 32.2 25.0 20.7 9.7 4.7 16.6 DIFFERENCE BETWEEN AVERAGE MAXIMUM 13.3 15.8 10.5 15.2 16.2 18.0 16.0 19.1 18.6 17.9 10.8 8.9 15.0 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 1.97 1.80 3.17 4.24 6.17 7.83 9.21 7.23 5.11 4.26 3.95 3.27 4.85 MEAN OF MIXING RATIO AT 09 GMT. 2.98 3.26 3.55 4.24 5.12 5.84 7.81 6.48 4.41 4.74 4.65 3.89 4.75 MEAN OF MIXING RATIO AT 15 GMT. 2.71 2.78 3.70 3.93 5.80 6.62 8.45 6.87 5.14 4.87 4.61 3.85 4.95 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -36.4 -26.4 -11.2 -7.2 -0.6 5.2 10.2 8.8 2.0 -3.0 -7.0 -12.6 -36.4 DAY 29 6 9 13 6 14 8 31 16 25 28 28 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 12.4 8.8 13.8 26.8 28.2 31.4 35.6 37.0 30.6 25.4 15.2 11.8 37.0 DAY 6 18 31 26 28 26 29 14 1 2 17 8 24 HOUR MAXIMUM PRECIPITATION IN MM. 5.6 10.0 7.0 14.8 6.3 11.9 14.0 0.0 0.8 8.6 19.5 11.9 19.5 DAY 27 19 29 5 30 6 5 ** 9 21 3 9 MONTHLY TOTAL PRECIPITATION IN MM. 12.7 12.5 22.8 24.7 29.4 26.3 17.0 0.0 0.8 15.8 36.2 43.5 241.7 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 19.9 33.3 7.4 39.5 NO. OF DAYS WITH PRECIPITATION. 4 4 12 6 11 7 3 0 1 4 6 7 65 NO. OF DAYS PRECIPITATION EQUAL 2 3 7 5 9 6 2 0 0 4 5 6 49 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 0 1 0 1 1 0 0 0 1 3 8 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 69 76 83 76 74 69 65 57 65 70 83 88 73 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 60 68 56 39 31 24 30 20 23 30 57 66 42 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 66 72 69 39 44 34 37 27 34 42 69 77 51 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 24 24 14 5 0 0 0 0 0 0 8 15 90 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 7 2 0 0 0 0 0 0 0 0 1 20 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 6 19 25 2 0 0 0 52 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 28 13 1 0 0 0 0 8 17 28 151 DATE OF START AND END FREEZING START = 4 OCT. END = 6 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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. -6.4 -5.7 1.8 10.1 13.8 20.3 21.3 22.4 17.3 10.4 7.6 3.6 9.7 AVERAGE OF MINIMUM TEMPERATURE IN C. -12.4 -11.1 -4.0 2.9 6.1 11.9 13.2 14.2 8.3 1.0 -0.0 -2.8 2.3 AVERAGE OF MAXIMUM TEMPERATURE IN C. -0.5 -0.2 7.6 17.5 21.5 28.7 29.4 30.7 26.4 19.9 15.1 10.1 17.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.9 10.9 11.6 14.6 15.4 16.8 16.2 16.5 18.1 18.9 15.1 12.9 14.9 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.14 2.18 3.42 5.07 6.79 7.40 8.77 8.49 6.92 3.96 3.84 3.59 5.22 MEAN OF MIXING RATIO AT 09 GMT. 2.98 2.99 4.18 4.32 6.08 6.40 8.41 6.95 7.86 3.83 4.52 4.27 5.23 MEAN OF MIXING RATIO AT 15 GMT. 2.59 2.83 3.99 4.77 6.50 6.65 9.00 8.18 7.84 4.25 4.57 4.28 5.46 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -25.8 -25.6 -19.8 -3.4 -0.4 7.0 4.0 10.0 3.8 -4.0 -5.8 -14.6 -25.8 DAY 10 17 3 25 5 2 26 6 26 25 6 5 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 4.4 6.8 16.4 24.6 27.8 35.0 36.2 35.6 33.6 26.2 19.2 18.0 36.2 DAY 25 7 24 13 9 28 25 29 2 5 22 10 24 HOUR MAXIMUM PRECIPITATION IN MM. 13.4 10.9 39.8 14.8 10.8 0.0 7.3 6.5 3.1 2.2 7.8 10.2 39.8 DAY 29 27 17 4 24 ** 30 1 14 11 12 4 MONTHLY TOTAL PRECIPITATION IN MM. 49.9 31.4 92.5 40.3 37.0 0.0 12.5 6.5 4.2 3.7 26.6 15.6 320.2 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 54.3 24.1 7.2 14.3 NO. OF DAYS WITH PRECIPITATION. 13 8 9 6 9 0 2 1 2 2 5 5 62 NO. OF DAYS PRECIPITATION EQUAL 11 7 7 6 6 0 2 1 2 2 5 4 53 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 1 2 2 1 0 0 0 0 0 0 1 8 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 83 83 83 80 81 59 67 63 76 73 76 81 75 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 78 72 61 37 36 24 31 24 35 27 44 54 44 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 84 79 67 43 45 30 40 36 45 39 57 73 53 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 23 23 12 0 0 0 0 0 0 1 2 9 70 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 18 15 2 0 0 0 0 0 0 0 0 0 35 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 11 15 19 2 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. 30 26 22 8 1 0 0 0 0 15 16 23 141 DATE OF START AND END FREEZING START = 12 OCT. END = 5 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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. -1.3 1.5 2.9 8.8 14.5 19.0 20.2 22.8 16.5 11.4 3.4 0.5 10.0 AVERAGE OF MINIMUM TEMPERATURE IN C. -6.6 -5.2 -5.1 0.9 4.8 9.2 12.6 13.9 6.9 2.4 -2.4 -5.7 2.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.9 8.2 11.0 16.8 24.2 28.7 27.9 31.6 26.1 20.4 9.2 6.8 17.9 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.5 13.4 16.1 15.9 19.4 19.5 15.3 17.7 19.2 18.0 11.6 12.5 15.8 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.80 3.01 3.09 4.43 5.31 6.42 8.04 8.21 5.84 3.99 3.57 3.13 4.82 MEAN OF MIXING RATIO AT 09 GMT. 3.63 3.52 2.91 4.03 3.98 5.17 7.66 6.94 5.23 4.18 4.05 3.66 4.58 MEAN OF MIXING RATIO AT 15 GMT. 3.54 3.41 2.97 4.19 4.44 5.35 8.33 7.90 5.94 4.23 4.03 3.61 4.83 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -13.4 -9.6 -12.0 -5.0 -1.8 5.0 6.8 10.0 -0.2 -5.2 -11.6 -22.6 -22.6 DAY 4 23 6 19 22 5 28 4 29 14 30 4 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 9.2 13.4 18.2 23.2 31.0 33.6 33.6 34.6 31.0 26.6 15.4 16.8 34.6 DAY 15 26 31 30 31 21 4 1 3 1 19 31 24 HOUR MAXIMUM PRECIPITATION IN MM. 4.1 10.4 9.9 13.3 5.0 2.8 25.2 7.3 1.0 6.2 12.5 4.8 25.2 DAY 21 18 21 2 10 9 15 18 26 25 8 3 MONTHLY TOTAL PRECIPITATION IN MM. 11.3 24.3 19.7 27.9 13.3 2.8 30.6 13.2 1.8 16.7 21.2 15.9 198.7 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 27.8 22.1 22.9 27.1 NO. OF DAYS WITH PRECIPITATION. 5 8 5 6 5 1 3 4 2 5 6 7 57 NO. OF DAYS PRECIPITATION EQUAL 4 5 3 4 4 1 2 3 1 3 4 5 39 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 0 1 0 0 1 0 0 0 1 0 4 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 87 84 84 76 66 56 62 62 70 64 85 86 74 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 66 50 36 34 21 21 32 23 24 29 53 58 37 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 78 59 44 40 29 25 42 33 35 37 64 72 47 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 21 19 20 3 0 0 0 0 0 1 10 20 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 3 0 0 0 0 0 0 0 0 0 1 2 6 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 1 10 10 24 5 0 0 0 50 OR MORE THAN 30 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 40 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 0 0 0 0 0 0 0 0 OR MORE THAN 45 NUMBER OF FREEZING DAYS. 31 24 28 12 3 0 0 0 1 6 22 25 152 DATE OF START AND END FREEZING START = 29 SEP. END = 23 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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. -2.4 -3.8 3.0 11.3 15.1 18.8 21.7 21.9 17.3 9.6 3.4 0.6 9.7 AVERAGE OF MINIMUM TEMPERATURE IN C. -7.3 -10.7 -3.8 3.6 6.4 9.7 13.0 13.7 8.3 2.5 -1.8 -3.2 2.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.3 3.1 9.8 19.0 23.7 27.9 30.4 30.2 26.3 16.7 8.7 4.4 16.9 DIFFERENCE BETWEEN AVERAGE MAXIMUM 9.6 13.8 13.6 15.4 17.3 18.2 17.4 16.5 18.0 14.2 10.5 7.6 14.3 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.41 2.03 3.11 4.90 5.51 5.98 7.31 7.56 6.24 4.76 3.89 3.05 4.73 MEAN OF MIXING RATIO AT 09 GMT. 3.07 3.48 3.33 4.71 4.41 5.04 6.31 6.50 5.92 4.88 4.30 4.22 4.68 MEAN OF MIXING RATIO AT 15 GMT. 2.81 3.18 3.59 5.11 5.11 5.72 6.88 7.62 6.49 5.49 4.51 4.11 5.05 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -17.2 -28.8 -12.8 -3.2 1.6 2.0 5.0 8.8 2.4 -2.2 -7.4 -11.4 -28.8 DAY 8 9 16 2 13 14 23 29 27 30 29 29 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 15.6 9.4 16.0 23.8 29.6 35.2 34.0 34.6 32.2 22.2 13.4 8.4 35.2 DAY 1 24 31 16 26 23 1 3 8 11 3 31 24 HOUR MAXIMUM PRECIPITATION IN MM. 12.4 2.7 24.8 22.8 2.8 0.0 4.8 0.0 3.4 11.0 13.0 8.6 24.8 DAY 6 14 24 21 9 ** 5 ** 3 3 2 15 MONTHLY TOTAL PRECIPITATION IN MM. 43.4 10.0 56.3 35.6 6.4 0.0 8.6 0.0 11.8 26.4 35.8 29.0 263.3 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 41.7 16.0 7.7 34.6 NO. OF DAYS WITH PRECIPITATION. 14 5 6 4 4 0 3 0 5 7 8 11 67 NO. OF DAYS PRECIPITATION EQUAL 9 5 5 3 3 0 3 0 5 7 5 8 53 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 1 0 3 1 0 0 0 0 0 1 2 0 8 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 79 77 79 74 62 53 55 57 69 80 88 76 71 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 67 69 45 33 23 22 22 24 27 41 56 73 42 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 75 75 52 41 31 28 31 33 39 58 72 87 52 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 21 23 16 0 0 0 0 0 0 0 12 9 81 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 11 3 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 12 21 17 3 0 0 0 53 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 28 27 5 0 0 0 0 0 7 19 26 137 DATE OF START AND END FREEZING START = 5 OCT. END = 17 APR. IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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. -1.9 -0.0 6.0 10.8 13.8 18.9 20.9 22.0 17.1 11.0 4.9 3.3 10.6 AVERAGE OF MINIMUM TEMPERATURE IN C. -7.1 -5.9 -2.2 2.0 4.6 9.8 13.3 12.9 7.8 3.1 -1.1 -1.1 3.0 AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.2 5.9 14.2 19.7 22.9 28.1 28.6 31.0 26.4 19.0 11.0 7.7 18.1 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.3 11.8 16.4 17.7 18.3 18.3 15.3 18.1 18.6 15.9 12.1 8.8 15.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.59 3.01 3.39 4.25 5.20 6.36 8.42 7.19 5.35 4.72 3.96 3.99 4.87 MEAN OF MIXING RATIO AT 09 GMT. 3.22 3.48 3.61 3.84 4.45 5.41 7.92 5.83 5.59 4.83 3.98 4.30 4.70 MEAN OF MIXING RATIO AT 15 GMT. 2.96 3.37 3.66 4.42 4.95 5.78 8.33 6.87 6.08 5.25 4.16 4.26 5.01 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -18.4 -11.8 -9.8 -2.2 0.0 2.2 8.6 7.2 4.8 -3.4 -21.0 -11.4 -21.0 DAY 28 1 12 13 6 2 19 14 10 21 20 22 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 9.4 13.8 21.2 25.4 29.8 35.6 35.0 37.4 30.0 25.0 20.6 13.4 37.4 DAY 10 28 30 5 16 26 10 2 2 5 6 30 24 HOUR MAXIMUM PRECIPITATION IN MM. 3.0 5.4 10.0 10.0 6.6 2.0 14.0 0.0 0.0 7.3 21.5 5.9 21.5 DAY 4 11 9 9 2 16 21 ** ** 26 12 4 MONTHLY TOTAL PRECIPITATION IN MM. 7.2 10.8 33.2 29.5 10.6 2.0 31.0 0.0 0.0 21.3 35.0 22.0 202.6 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 25.3 20.8 15.3 38.6 NO. OF DAYS WITH PRECIPITATION. 6 4 6 6 2 1 5 0 0 4 4 7 45 NO. OF DAYS PRECIPITATION EQUAL 3 4 6 6 2 1 3 0 0 4 4 7 40 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 1 1 0 0 2 0 0 0 1 0 5 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 84 87 76 71 64 55 65 57 62 74 83 84 72 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 64 58 39 27 26 23 33 20 27 35 49 61 39 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 75 68 45 36 32 29 41 30 33 48 63 73 48 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 24 20 15 0 0 0 0 0 0 0 6 6 71 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 7 0 0 0 0 0 0 0 0 0 1 0 8 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 12 13 21 2 0 0 0 48 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 22 10 1 0 0 0 0 8 21 23 143 DATE OF START AND END FREEZING START = 3 OCT. END = 6 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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. -4.4 -1.1 5.5 9.1 12.9 17.7 21.3 21.2 17.7 13.4 4.4 -4.0 9.5 AVERAGE OF MINIMUM TEMPERATURE IN C. -10.7 -7.2 -2.3 3.6 4.6 8.2 13.1 12.1 5.9 3.9 -2.2 -9.2 1.7 AVERAGE OF MAXIMUM TEMPERATURE IN C. 1.8 5.1 13.2 14.6 21.2 27.1 29.6 30.3 29.5 22.9 11.0 1.1 17.3 DIFFERENCE BETWEEN AVERAGE MAXIMUM 12.5 12.3 15.5 11.0 16.6 18.9 16.5 18.2 23.6 19.0 13.2 10.3 15.6 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.18 2.62 3.41 5.13 5.71 5.85 8.54 7.67 4.53 4.36 3.71 2.72 4.70 MEAN OF MIXING RATIO AT 09 GMT. 3.52 3.86 3.27 5.09 5.05 4.70 7.16 6.83 4.17 4.27 4.05 3.72 4.64 MEAN OF MIXING RATIO AT 15 GMT. 3.04 3.66 3.39 4.97 5.49 5.23 8.76 7.58 4.61 4.93 4.18 3.04 4.91 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -25.6 -17.8 -11.6 -2.2 0.0 2.8 10.0 7.6 2.4 -2.4 -8.6 -24.2 -25.6 DAY 28 5 7 1 1 8 2 23 8 23 22 24 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 11.6 11.4 20.0 25.0 34.0 32.0 34.0 35.2 33.4 28.4 17.4 9.2 35.2 DAY 3 26 13 28 27 27 13 10 3 1 10 8 24 HOUR MAXIMUM PRECIPITATION IN MM. 8.0 11.5 22.5 21.9 15.1 0.0 4.5 0.0 0.0 1.5 14.0 9.7 22.5 DAY 29 14 18 2 4 ** 9 ** ** 15 1 9 MONTHLY TOTAL PRECIPITATION IN MM. 31.2 17.3 45.3 77.1 22.9 0.0 14.0 0.0 0.0 4.5 36.3 34.5 283.1 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 33.1 35.3 4.9 26.6 NO. OF DAYS WITH PRECIPITATION. 8 6 11 12 5 0 5 0 0 3 6 12 68 NO. OF DAYS PRECIPITATION EQUAL 8 4 10 10 4 0 5 0 0 3 6 10 60 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 1 3 1 0 0 0 0 0 2 0 8 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 78 82 76 79 75 54 65 65 58 67 85 86 73 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 77 70 36 49 34 21 27 24 15 23 47 81 42 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 81 75 45 54 41 26 39 35 22 38 62 81 50 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 23 20 14 0 0 0 0 0 0 0 12 22 91 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 12 3 0 0 0 0 0 0 0 0 0 15 30 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 1 6 15 19 10 0 0 0 51 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 23 21 5 1 0 0 0 0 6 21 28 131 DATE OF START AND END FREEZING START = 7 OCT. END = 1 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 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. -1.4 -0.6 2.8 10.6 12.7 17.7 21.9 21.5 16.8 13.3 3.3 -0.9 9.8 AVERAGE OF MINIMUM TEMPERATURE IN C. -6.5 -5.0 -3.1 3.5 4.1 8.8 13.4 13.0 7.3 3.9 -3.5 -5.4 2.5 AVERAGE OF MAXIMUM TEMPERATURE IN C. 3.8 3.8 8.6 17.6 21.4 26.6 30.5 30.1 26.3 22.6 10.2 3.7 17.1 DIFFERENCE BETWEEN AVERAGE MAXIMUM 10.3 8.8 11.7 14.1 17.3 17.8 17.1 17.1 19.0 18.7 13.7 9.1 14.6 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.70 3.22 3.77 4.98 5.97 7.38 8.76 7.92 5.86 4.42 3.48 3.19 5.14 MEAN OF MIXING RATIO AT 09 GMT. 3.72 3.49 3.96 4.96 5.15 6.40 8.09 7.50 5.85 4.69 3.69 4.38 5.16 MEAN OF MIXING RATIO AT 15 GMT. 3.42 3.51 3.90 5.24 6.01 7.10 8.33 8.09 6.30 4.86 4.35 4.06 5.43 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -19.8 -16.0 -12.4 -6.0 -4.2 3.0 9.8 10.2 3.0 -0.2 -10.2 -16.4 -19.8 DAY 1 18 1 2 2 1 2 12 10 22 23 12 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 10.6 8.4 17.0 26.0 25.6 32.0 36.2 36.4 32.6 27.0 19.8 10.8 36.4 DAY 12 8 25 6 16 22 17 12 6 11 5 18 24 HOUR MAXIMUM PRECIPITATION IN MM. 4.0 3.3 18.5 25.6 11.0 9.5 0.0 5.5 0.0 1.6 13.7 11.9 25.6 DAY 16 25 26 16 30 1 ** 21 ** 29 11 4 MONTHLY TOTAL PRECIPITATION IN MM. 8.0 11.8 39.9 67.6 39.8 10.5 0.0 5.5 0.0 4.4 38.3 40.0 265.8 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 22.5 44.4 2.1 31.1 NO. OF DAYS WITH PRECIPITATION. 2 7 10 13 11 2 0 1 0 4 8 15 73 NO. OF DAYS PRECIPITATION EQUAL 2 5 7 13 11 2 0 1 0 2 7 9 59 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 0 1 1 1 0 0 0 0 0 1 1 5 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 82 88 88 75 75 67 64 61 70 64 83 84 75 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 72 64 55 47 32 28 29 26 26 27 45 80 44 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 78 75 64 52 45 37 36 37 38 34 61 84 53 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 17 17 11 1 1 0 0 0 0 0 16 17 80 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 3 2 0 0 0 0 0 0 0 0 3 13 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 5 20 14 6 0 0 0 45 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 25 25 8 7 0 0 0 0 1 24 24 141 DATE OF START AND END FREEZING START = 22 OCT. END = 30 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. MEAN AND EXTREMES FOR THE PERIOD 1995 TO 2003 PAGE 1 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE OF MEAN DAILY TEMPE. IN C. -3.3 -2.1 3.0 9.5 13.8 18.6 21.4 22.0 16.9 11.2 4.4 0.4 9.6 SD OF MEAN DAILY TEMPERATURE IN C. 1.83 2.76 1.91 1.35 0.82 0.93 0.65 0.66 0.59 1.44 1.31 2.63 1.41 AVERAGE OF MINIMUM TEMPERATURE IN C. -8.8 -8.0 -3.6 2.4 5.3 9.6 13.3 12.9 7.2 2.5 -2.2 -5.0 2.1 AVERAGE OF MAXIMUM TEMPERATURE IN C. 2.3 3.9 9.6 16.7 22.3 27.6 29.5 31.0 26.6 19.9 11.0 5.7 17.2 DIFFERENCE BETWEEN AVERAGE MAXIMUM 11.1 11.9 13.2 14.4 17.0 18.0 16.2 18.1 19.5 17.4 13.3 10.7 15.1 AND MINIMUM TEMPERATURE. MEAN OF MIXING RATIO AT 03 GMT. 2.40 2.63 3.35 4.74 5.95 6.79 8.55 7.80 5.60 4.31 3.64 3.14 4.90 MEAN OF MIXING RATIO AT 09 GMT. 3.29 3.49 3.58 4.51 5.25 5.66 8.16 7.08 5.42 4.54 4.24 4.06 4.94 MEAN OF MIXING RATIO AT 15 GMT. 2.99 3.32 3.65 4.70 5.71 6.17 8.79 7.82 5.97 4.81 4.26 3.77 5.16 ABSOLUTE OF MINIMUM TEMPERATURE IN C. -36.4 -28.8 -19.8 -7.2 -4.2 2.0 4.0 5.0 -0.2 -5.4 -21.0 -24.2 -36.4 YEAR - DAY 97-29 0- 9 98- 3 97-13 3- 2 0-14 98-26 96-31 99-29 96-28 1-20 2-24 97-29 ABSOLUTE OF MAXIMUM TEMPERATURE IN C. 15.6 13.8 21.2 26.8 34.0 35.6 36.2 37.4 33.6 28.4 20.6 18.0 37.4 YEAR - DAY 0- 1 1-28 1-30 97-26 2-27 1-26 98-25 1- 2 98- 2 2- 1 1- 6 98-10 1- 2 24 HOUR MAXIMUM PRECIPITATION IN MM. 13.4 11.5 39.8 25.6 17.3 11.9 25.2 7.6 6.0 11.0 21.5 11.9 39.8 YEAR - DAY 98-29 2-14 98-17 3-16 96- 9 97- 6 99-15 96-30 96- 1 0- 3 1-12 97- 9 98-17 MONTHLY TOTAL PRECIPITATION IN MM. 22.9 19.2 43.1 45.5 24.3 5.2 15.9 3.7 2.8 11.4 26.5 22.6 243.1 ---------------- ---------------- ---------------- ---------------- SEASONAL PERCENT OF PRECIPITATION 35.1 30.9 9.2 24.9 NO. OF DAYS WITH PRECIPITATION. 8 7 9 8 7 1 4 1 1 4 6 8 64 NO. OF DAYS PRECIPITATION EQUAL 6 6 7 7 6 1 3 1 1 3 4 5 50 OR MORE THAN 1 MM. NO. OF DAYS PRECIPITATION EQUAL 0 1 1 2 1 0 0 0 0 0 1 1 7 OR MORE THAN10 MM. MEAN OF RELATIVE HUMIDITY AT 03 GMT. 81 83 82 77 73 60 64 62 67 70 82 82 74 MEAN OF RELATIVE HUMIDITY AT 09 GMT. 69 66 49 39 31 24 31 24 25 32 49 66 42 MEAN OF RELATIVE HUMIDITY AT 15 GMT. 77 73 57 45 40 31 39 33 34 42 62 75 51 NO. OF DAYS MINIMUM TEMPERATURE EQUAL 22 20 15 1 0 0 0 0 0 1 11 16 86 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 5 1 0 0 0 0 0 0 0 0 3 19 OR LESS THAN 0 NO. OF DAYS MAXIMUM TEMPERATURE EQUAL 0 0 0 0 0 8 16 21 5 0 0 0 50 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 25 9 2 0 0 0 0 8 21 25 145 DATE OF START AND END FREEZING START = 29 SEP. END = 30 MAY IRANIAN METEOROLOGICAL ORGANIZATION ( IMO ) STATION KHEIRABAD-ZANJAN LATITUDE 36 31 N DATA PROCESSING CENTER LONGITUDE 48 47 E ELEVATION 1770 MET. MEAN AND EXTREMES FOR THE PERIOD 1995 TO 2003 PAGE 2 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AVERAGE DRY BULB TEMPERATURE. IN C. -3.4 -1.8 3.4 10.2 15.3 20.6 22.5 23.1 17.9 11.9 4.6 0.5 10.4 AVERAGE DEW POINT TEMPERATURE. IN C. -7.5 -6.4 -4.6 -0.8 2.0 3.4 7.9 6.1 2.0 -1.0 -2.8 -4.2 -0.5 AVERAGE OF MIXING RATIO IN G/KG 2.90 3.15 3.52 4.65 5.63 6.20 8.49 7.56 5.66 4.55 4.04 3.65 5.00 AVERAGE OF VAPOUR PRESSURE HPA 3.77 4.10 4.60 6.09 7.39 8.16 11.14 9.94 7.44 5.96 5.28 4.76 6.55 AVERAGE OF SATURATION DEFICIT IN HPA 1.47 1.76 3.86 7.37 11.35 17.72 17.71 20.51 15.27 9.46 3.93 2.02 9.37 AVERAGE RELATIVE HUMIDITY IN PERCENT 76 74 63 54 48 38 45 40 42 48 64 74 56 AVERAGE OF MAXIMUM RELATIVE HUMIDITY(%) 87 87 84 78 74 60 64 62 67 71 83 87 75 AVERAGE OF MINIMUM RELATIVE HUMIDITY(%) 65 62 46 36 29 23 29 23 24 30 47 60 40 NO. OF DAYS PRECIPITATION EQUAL 2 1 3 3 2 0 1 0 0 1 2 1 16 OR MORE THAN 5 MM.