STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** ***** ***** ***** 14.6 20.2 23.4 24.1 19.1 12.5 6.2 -0.0 ***** MINIMUN AIR TEMPERATURE (C) ***** ***** ***** ***** 6.9 10.8 14.4 13.4 9.1 3.8 0.6 -4.8 ***** DAYS WITH MINIMUM TEMP. >=21 **** **** **** **** 0 0 1 1 0 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 **** **** **** **** 0 0 0 0 0 0 2 18 **** DAYS WITH FREEZING MIN.<= 0 **** **** **** **** 0 0 0 0 0 1 15 31 **** TEMPERATURE RECORDS LOWEST(C) ***** ***** ***** ***** 1.0 5.0 11.0 8.0 5.0 -1.0 -5.0 -12.0 ***** DAY ** ** ** ** 9 12 9 18 29 12 26 6 MAXIMUM AIR TEMPERATURE (C) ***** ***** ***** ***** 23.7 30.9 32.5 36.7 30.3 22.9 12.6 4.8 ***** DAYS WITH MAXIMUM TEMP. >=30 **** **** **** **** 4 18 30 30 17 0 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 **** **** **** **** 0 0 0 0 0 0 0 2 **** TEMPERATURE RECORDS HIGHEST(C)***** ***** ***** ***** 30.0 40.0 36.0 43.0 37.0 28.0 18.0 10.0 ***** DAY ** ** ** ** 17 27 19 13 5 4 1 1 DIF. BETWEEN (MAX.-MIN.) (C) ***** ***** ***** ***** 16.8 20.1 18.1 23.3 21.2 19.1 12.0 9.6 ***** MEAN DAILY TEMP. (MDT) (C) ***** ***** ***** ***** 15.3 20.9 23.5 25.0 19.7 13.4 6.6 0.0 ***** COOLING DEG. DAYS(BASE 21 0C)****** ****** ****** ****** 0.0 45.0 77.0 127.0 18.5 0.0 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C)****** ****** ****** ****** 91.5 15.5 0.0 0.0 18.5 144.0 341.5 557.5 ****** DEWPOINT (MEAN C) ***** ***** ***** ***** 5.2 6.1 8.4 8.5 6.4 1.7 -0.4 -3.6 ***** MIXING RATIO (G/KG) ****** ****** ****** ****** 6.79 7.30 8.55 8.53 7.43 5.33 4.54 3.59 ****** VAPOUR PRESSURE (HPA) ****** ****** ****** ****** 8.99 9.64 11.22 11.21 9.83 7.11 6.04 4.77 ****** SATURATION DEF. (HPA) ****** ****** ****** ****** 8.75 15.95 19.26 21.35 14.05 8.43 3.79 1.47 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** 57 43 41 41 48 52 66 79 *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** 80 65 61 62 69 75 83 92 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** 34 26 25 21 25 28 46 60 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** 72 59 59 59 67 71 79 86 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** 38 30 30 26 30 32 51 67 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** 48 34 31 30 39 46 62 79 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. ****** ****** ****** ****** 57.8 9.0 0.0 0.0 0.0 0.0 88.2 76.0 ****** DAYS WITH PRECIPITATION >=10 **** **** **** **** 1 0 0 0 0 0 4 3 **** DAYS WITH PRECIPITATION >= 5 **** **** **** **** 2 1 0 0 0 0 5 5 **** DAYS WITH PRECIPITATION >= 1 **** **** **** **** 9 2 0 0 0 0 7 6 **** DAYS WITH PRECIPITATION **** **** **** **** 11 3 0 0 0 1 7 7 **** GREATEST DAILY PRECIPITATION ****** ****** ****** ****** 33.6 7.0 0.0 0.0 0.0 0.0 28.0 40.0 ****** DAY ** ** ** ** 21 22 ** ** ** ** 11 4 DAY WITH THUNDER STORM **** **** **** **** 12 1 0 0 0 0 0 0 **** DAYS WITH SNOW OR SLEET **** **** **** **** 0 0 0 0 0 0 2 7 **** DAYS WITH DUST **** **** **** **** 0 0 0 0 0 0 0 0 **** WIND DIRECTION (PREVAILING) *** *** *** *** 90 90 90 90 90 180 180 90 *** PREVAILING WIND SPEED(KNOTS) **** **** **** **** 5.1 5.5 3.4 4.6 4.5 3.8 6.6 6.9 **** PREVAILING WIND PERCENT ***** ***** ***** ***** 13.0 13.8 6.0 12.5 10.8 8.9 10.0 21.8 ***** CALMS PERCENT OF WIND ***** ***** ***** ***** 44.9 49.6 71.8 61.3 67.5 73.0 68.3 55.6 ***** NO. OF WIND OBSERVATION **** **** **** **** 247 240 248 248 240 248 240 248 1959 VECTOR WIND DIRECTION (MEAN) *** *** *** *** 132 90 191 127 127 126 169 118 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** **** 0.6 1.6 0.1 1.1 0.9 0.5 1.1 1.7 **** WIND STEADINESES (MEAN %) ***** ***** ***** ***** 24.0 55.2 9.1 64.7 64.3 45.5 61.1 51.5 ***** WIND SPEED (MEAN KNOTS) **** **** **** **** 2.5 2.9 1.1 1.7 1.4 1.1 1.8 3.3 **** FASTEST WIND DIRECTION *** *** *** *** 90 30 270 90 190 180 200 60 *** FASTEST WIND SPEED (KNOTS) *** *** *** *** 30 18 9 13 12 10 16 18 *** DAY ** ** ** ** 12 22 29 14 28 6 24 1 DAYS WITH SKY CLEAR (0-2)/8 **** **** **** **** 11 24 31 26 28 22 6 9 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** **** **** 19 5 0 5 2 7 15 13 **** DAYS WITH CLOUDY (7-8)/8 **** **** **** **** 1 1 0 0 0 2 9 9 **** DAYS WITH VISIBILITY =< 2 KM **** **** **** **** 1 0 0 0 0 0 0 4 **** DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 833.4 831.4 828.3 829.7 833.2 836.9 835.3 832.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 841.0 836.3 834.2 836.0 840.0 841.3 842.0 858.1 ****** DAY-HOUR **-** **-** **-** **-** 8-12 1- 6 9- 6 12- 0 21- 6 19- 6 16- 6 1-12 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 825.0 824.4 822.7 822.6 825.5 830.5 826.0 824.2 ****** DAY-HOUR **-** **-** **-** **-** 3-12 29-15 29-12 15-12 1-12 6-12 24- 0 29- 3 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1018.4 1016.0 1012.4 1014.0 1018.1 1022.5 1020.6 1017.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1027.4 1021.8 1019.4 1021.5 1026.2 1027.7 1028.5 1047.5 ****** DAY-HOUR **-** **-** **-** **-** 8-12 1- 6 9- 6 12- 0 21- 6 19- 6 16- 6 1-12 MIN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** 1003.1 995.7 991.9 993.0 998.9 1006.6 1004.8 1009.8 ****** DAY ** ** ** ** 3 29 29 14 2 6 24 29 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 833.8 832.0 829.2 830.7 834.0 837.4 835.5 832.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 839.5 836.1 834.0 836.0 839.3 840.7 841.0 841.6 ****** DAY ** ** ** ** 9 2 10 21 21 19 12 2 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 825.9 827.2 824.0 826.4 828.7 832.0 826.7 824.2 ****** DAY ** ** ** ** 3 30 29 7 1 6 24 29 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1018.9 1016.8 1013.4 1015.2 1019.1 1023.1 1020.8 1017.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1025.6 1021.6 1019.1 1021.5 1025.4 1027.0 1027.4 1028.1 ****** DAY ** ** ** ** 9 2 10 21 21 19 12 2 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1009.6 1011.1 1007.3 1010.2 1012.9 1016.8 1010.5 1007.6 ****** DAY ** ** ** ** 3 30 29 7 1 6 24 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.3 1006.6 1000.9 1002.5 1009.9 1019.0 1020.3 1020.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1023.0 1013.9 1008.1 1011.2 1020.3 1025.0 1029.7 1031.9 ****** DAY ** ** ** ** 9 2 9 18 30 11 12 2 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1003.1 998.4 994.9 996.1 1002.3 1008.4 1006.3 1009.3 ****** DAY ** ** ** ** 25 29 20 14 2 6 24 29 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. 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QNH PRESSURE IN HPA ****** ****** ****** ****** 1009.7 1010.3 1007.0 1008.6 1011.8 1015.6 1010.3 1009.0 ****** DAY ** ** ** ** 3 29 29 7 1 6 24 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1010.1 1003.9 998.1 999.0 1006.2 1015.3 1018.4 1019.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1022.9 1010.9 1004.8 1006.3 1015.8 1022.2 1028.8 1032.3 ****** DAY ** ** ** ** 8 11 9 17 30 11 12 2 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1002.8 995.1 992.2 991.5 997.9 1005.8 1006.4 1010.5 ****** DAY ** ** ** ** 25 29 20 15 1 6 23 29 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 832.6 830.4 827.3 828.7 832.1 835.8 834.5 832.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 841.0 835.4 833.0 832.3 838.5 839.2 840.0 858.1 ****** DAY ** ** ** ** 8 1 9 20 30 18 16 1 MIN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** 1001.3 994.1 990.5 988.9 996.0 1005.6 1005.3 1008.3 ****** DAY ** ** ** ** 25 29 20 15 1 6 23 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1955 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 832.5 830.2 826.9 828.3 832.0 836.0 834.8 832.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 840.0 835.0 832.0 833.1 839.0 839.4 840.0 841.8 ****** DAY ** ** ** ** 8 1 8 17 30 19 16 2 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 826.0 824.4 822.9 823.5 825.5 831.3 827.8 825.8 ****** DAY ** ** ** ** 2 29 28 5 1 7 23 18 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1017.4 1014.7 1010.8 1012.5 1016.8 1021.4 1020.1 1017.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1026.2 1020.3 1016.8 1018.1 1025.0 1025.5 1026.2 1028.3 ****** DAY ** ** ** ** 8 1 8 17 30 19 16 2 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1009.7 1007.8 1006.1 1006.8 1009.1 1015.9 1011.8 1009.5 ****** DAY ** ** ** ** 2 29 28 5 1 7 23 18 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1010.5 1004.3 998.1 999.6 1007.5 1017.1 1019.5 1020.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1024.0 1012.0 1005.7 1009.2 1019.8 1023.6 1027.7 1032.0 ****** DAY ** ** ** ** 8 11 9 17 30 10 11 2 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1002.5 994.8 990.7 992.2 999.0 1008.7 1007.4 1010.0 ****** DAY ** ** ** ** 25 29 20 5 1 7 23 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 833.7 831.3 828.0 829.1 832.8 836.8 835.2 833.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 840.5 836.2 833.0 833.2 838.8 840.3 840.7 841.5 ****** DAY ** ** ** ** 8 1 8 17 29 14 11 2 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 826.0 825.0 823.5 824.5 827.0 831.4 828.0 826.4 ****** DAY ** ** ** ** 2 29 28 5 1 7 23 28 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1018.8 1015.9 1012.1 1013.4 1017.7 1022.4 1020.5 1017.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1026.8 1021.7 1017.9 1018.2 1024.8 1026.5 1027.0 1027.9 ****** DAY ** ** ** ** 8 1 8 17 29 14 11 2 MIN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** 1002.8 994.0 992.0 992.1 998.4 1006.3 1007.4 1010.5 ****** DAY ** ** ** ** 21 29 20 5 1 7 23 28 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.1 1.7 2.3 8.9 14.8 19.8 23.9 23.1 16.9 12.1 8.5 -0.2 10.7 MINIMUN AIR TEMPERATURE (C) -8.1 -3.5 -3.4 2.6 4.6 9.9 15.0 15.3 9.2 2.9 0.6 -4.2 3.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 27 15 14 2 0 0 0 0 0 0 6 15 79 DAYS WITH FREEZING MIN.<= 0 30 25 28 5 1 0 0 0 0 9 15 27 140 TEMPERATURE RECORDS LOWEST(C) -15.0 -10.0 -13.0 -11.0 0.0 5.0 12.0 12.0 1.0 -2.0 -7.0 -13.0 -15.0 DAY 18 1 25 1 1 3 3 12 29 22 13 13 MAXIMUM AIR TEMPERATURE (C) 2.6 7.0 8.3 16.3 25.9 30.2 32.9 31.7 26.2 22.5 15.3 6.4 18.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 8 17 27 24 5 0 0 0 81 DAYS WITH MAXIMUM TEMP. <= 0 6 1 1 0 0 0 0 0 0 0 0 4 12 TEMPERATURE RECORDS HIGHEST(C) 7.0 12.0 17.0 25.0 32.0 37.0 38.0 38.0 33.0 27.0 21.0 16.0 38.0 DAY 30 16 16 25 23 25 25 4 1 9 4 4 DIF. BETWEEN (MAX.-MIN.) (C) 10.7 10.5 11.7 13.7 21.3 20.3 17.9 16.4 17.0 19.6 14.7 10.6 15.4 MEAN DAILY TEMP. (MDT) (C) -2.7 1.8 2.5 9.5 15.2 20.0 24.0 23.5 17.7 12.7 7.9 1.1 11.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 28.5 92.5 81.0 1.5 0.0 0.0 0.0 203.5 HEATING DEG. DAYS(BASE 18 0C) 643.0 471.0 481.5 256.0 91.0 14.0 0.0 0.0 47.0 165.0 302.0 525.0 2995.5 DEWPOINT (MEAN C) -5.9 -2.4 -1.6 4.2 4.1 6.7 12.3 11.1 10.2 7.2 -0.1 -5.4 3.4 MIXING RATIO (G/KG) 3.04 4.00 4.21 6.39 6.27 7.63 11.05 10.11 9.69 8.10 4.91 3.23 6.55 VAPOUR PRESSURE (HPA) 4.05 5.31 5.57 8.45 8.30 10.08 14.50 13.34 12.80 10.77 6.55 4.32 8.67 SATURATION DEF. (HPA) 1.03 1.87 2.00 3.64 10.40 15.13 16.72 16.47 7.96 4.72 5.18 2.19 7.28 RELATIVE HUMIDITY (MEAN %) 82 77 78 76 54 46 51 49 66 73 58 70 65 RELATIVE HUMIDITY (MAX. %) 92 93 91 93 80 67 71 69 83 84 73 84 82 RELATIVE HUMIDITY (MIN. %) 65 55 60 55 30 27 35 33 50 59 46 53 47 RELATIVE HUMIDITY (MEAN% 03UTC) 87 87 86 89 75 58 69 62 80 81 69 77 77 RELATIVE HUMIDITY (MEAN% 09UTC) 67 61 67 59 33 29 38 36 52 64 49 59 51 RELATIVE HUMIDITY (MEAN% 15UTC) 87 75 76 69 43 39 40 43 63 76 62 71 62 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 14.4 104.9 169.9 273.0 4.0 7.0 0.0 2.3 42.0 0.0 0.4 5.9 623.8 DAYS WITH PRECIPITATION >=10 0 4 7 10 0 0 0 0 2 0 0 0 23 DAYS WITH PRECIPITATION >= 5 1 7 9 14 0 0 0 0 2 0 0 0 33 DAYS WITH PRECIPITATION >= 1 4 9 16 21 2 3 0 2 6 0 0 3 66 DAYS WITH PRECIPITATION 6 11 19 22 2 3 0 4 7 2 1 8 85 GREATEST DAILY PRECIPITATION 5.6 37.0 37.0 42.0 2.0 3.0 0.0 1.0 18.0 0.0 0.4 2.0 42.0 DAY 13 8 13 17 4 18 ** 1 4 ** 8 10 DAY WITH THUNDER STORM 0 1 1 4 0 3 0 1 3 0 0 0 13 DAYS WITH SNOW OR SLEET 6 8 15 1 0 0 0 0 0 0 0 6 36 DAYS WITH DUST 0 0 0 1 1 0 1 0 0 0 1 0 4 WIND DIRECTION (PREVAILING) 90 90 90 90 90 90 90 90 90 90 180 90 90 PREVAILING WIND SPEED(KNOTS) 6.7 8.6 7.9 8.1 5.9 4.1 7.1 7.6 7.2 4.6 7.8 7.3 6.7 PREVAILING WIND PERCENT 20.6 16.4 16.9 12.1 18.5 20.0 16.1 31.0 15.0 23.4 23.3 18.1 18.5 CALMS PERCENT OF WIND 60.1 50.9 61.7 66.7 60.5 48.8 38.3 42.3 55.4 47.6 42.2 66.1 53.6 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 180 248 2868 VECTOR WIND DIRECTION (MEAN) 128 157 133 161 155 145 109 84 92 145 181 118 130 VECTOR WIND MAGNITUDE(KNOTS) 1.9 1.7 1.3 1.0 1.5 1.8 1.9 4.0 1.4 1.8 2.4 1.8 1.6 WIND STEADINESES (MEAN %) 65.5 42.5 41.9 34.5 55.6 66.7 44.2 80.0 50.0 56.2 63.2 75.0 48.5 WIND SPEED (MEAN KNOTS) 2.9 4.0 3.1 2.9 2.7 2.7 4.3 5.0 2.8 3.2 3.8 2.4 3.3 FASTEST WIND DIRECTION 180 100 270 220 210 240 120 50 100 210 180 90 270 FASTEST WIND SPEED (KNOTS) 25 25 30 25 25 15 18 30 20 25 25 25 30 DAY 30 6 26 26 12 11 26 5 3 17 9 21 DAYS WITH SKY CLEAR (0-2)/8 11 8 5 3 21 26 28 20 23 25 12 10 192 DAYS WITH P.CLOUDY (3-6)/8 16 14 11 13 10 4 3 11 7 6 11 9 115 DAYS WITH CLOUDY (7-8)/8 4 7 15 14 0 0 0 0 0 0 7 12 59 DAYS WITH VISIBILITY =< 2 KM 1 1 5 1 0 0 1 0 0 0 1 2 12 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 832.6 831.3 828.7 831.5 831.3 833.0 831.7 834.9 835.9 839.1 837.7 837.9 833.8 MAX. QFE PRESSURE IN HPA 840.1 838.2 838.3 837.8 836.9 839.9 838.0 843.0 844.5 844.1 846.2 845.4 846.2 DAY-HOUR 21-21 12-21 13-21 15-21 22-21 11- 6 30- 6 12-15 29- 6 26- 6 13- 6 2-18 MIN. QFE PRESSURE IN HPA 820.0 817.8 818.3 822.3 821.0 824.9 820.2 828.0 827.0 831.3 823.0 826.8 817.8 DAY-HOUR 31- 3 29- 0 29-15 26-15 28- 9 28-12 22-21 14-15 11-15 17-12 8-12 10-15 MEAN QNH PRESSURE IN HPA 1017.5 1016.0 1012.9 1016.2 1016.0 1018.0 1016.3 1020.1 1021.3 1025.1 1023.5 1023.7 1018.9 MAX. QNH PRESSURE IN HPA 1026.3 1024.1 1024.2 1023.6 1022.5 1026.1 1023.8 1029.7 1031.5 1031.0 1033.5 1032.5 1033.5 DAY-HOUR 21-21 12-21 13-21 15-21 22-21 11- 6 30- 6 12-15 29- 6 26- 6 13- 6 2-18 MIN. QNH PRESSURE IN HPA 1002.6 1000.1 1000.6 1005.3 1003.8 1008.4 1002.9 1012.1 1010.9 1015.9 1006.2 1010.6 1000.1 DAY-HOUR 31- 3 29- 0 29-15 26-15 28- 9 28-12 22-21 14-15 11-15 17-12 8-12 10-15 MEAN QFF PRESSURE IN HPA 1022.7 1017.6 1013.8 1012.4 1008.2 1006.8 1002.1 1006.6 1011.8 1019.1 1021.4 1027.0 1014.1 MAX. QFF PRESSURE IN HPA 1035.3 1031.0 1028.0 1030.2 1017.3 1019.0 1011.8 1017.6 1030.0 1029.5 1038.1 1040.8 1040.8 DAY-HOUR 20- 6 12-18 14- 3 1-18 10- 3 13- 3 29- 3 12-15 29- 3 25- 3 13- 3 13- 6 MIN. QFF PRESSURE IN HPA 1002.5 1000.7 1000.9 996.5 994.0 993.6 988.3 996.2 1000.1 1006.4 1001.5 1008.0 988.3 DAY-HOUR 31- 3 29- 9 17-12 26-12 28- 9 25-15 22-21 4-21 11-15 17-12 8-15 8- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 832.7 831.1 828.5 831.5 831.6 833.4 832.1 835.1 836.1 839.3 ****** 838.1 ****** MAX. QFE PRESSURE IN HPA 840.0 837.6 838.3 837.6 836.6 839.0 837.4 841.3 843.2 843.0 ****** 845.3 ****** DAY 26 13 14 2 23 11 30 8 30 26 ** 3 MIN. QFE PRESSURE IN HPA 821.0 817.8 818.9 825.0 825.0 827.4 828.3 829.0 829.7 834.1 ****** 827.0 ****** DAY 31 29 30 30 28 28 20 15 12 17 ** 8 MEAN QNH PRESSURE IN HPA 1017.6 1015.7 1012.7 1016.2 1016.3 1018.4 1016.9 1020.4 1021.6 1025.4 ****** 1023.9 ****** MAX. QNH PRESSURE IN HPA 1026.2 1023.3 1024.2 1023.3 1022.2 1025.0 1023.1 1027.7 1029.9 1029.7 ****** 1032.4 ****** DAY 26 13 14 2 23 11 30 8 30 26 ** 3 MIN. QNH PRESSURE IN HPA 1003.8 1000.1 1001.3 1008.5 1008.5 1011.4 1012.4 1013.2 1014.1 1019.2 ****** 1010.9 ****** DAY 31 29 30 30 28 28 20 15 12 17 ** 8 MEAN QFF PRESSURE IN HPA 1022.1 1016.9 1013.2 1012.1 1008.4 1007.4 1002.6 1007.0 1011.9 1019.4 ****** 1026.5 ****** MAX. QFF PRESSURE IN HPA 1031.8 1029.3 1027.1 1028.6 1015.3 1017.5 1009.4 1016.4 1027.3 1025.1 ****** 1036.9 ****** DAY 26 13 14 2 6 12 30 8 29 25 ** 13 MIN. QFF PRESSURE IN HPA 1003.2 1003.0 1002.2 1001.3 998.8 997.5 996.4 997.6 1002.6 1009.9 ****** 1008.0 ****** DAY 31 29 30 27 28 26 27 4 12 17 ** 8 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 832.5 831.2 828.5 831.8 832.1 834.0 832.8 835.6 836.6 839.6 838.1 838.1 834.2 MAX. QFE PRESSURE IN HPA 839.6 837.5 838.2 837.3 836.4 839.7 837.6 841.4 844.0 843.2 845.2 845.0 845.2 DAY 26 13 14 16 23 11 30 8 29 26 13 3 MIN. QFE PRESSURE IN HPA 820.0 818.7 819.3 824.0 824.9 827.8 828.7 829.9 831.0 833.7 825.9 828.7 818.7 DAY 31 29 30 30 28 28 27 15 12 17 8 10 MEAN QNH PRESSURE IN HPA 1017.3 1015.8 1012.7 1016.5 1016.8 1019.2 1017.7 1021.0 1022.2 1025.7 1023.9 1024.0 1019.4 MAX. QNH PRESSURE IN HPA 1025.7 1023.2 1024.1 1023.0 1021.9 1025.8 1023.3 1027.8 1030.9 1029.9 1032.3 1032.1 1032.3 DAY 26 13 14 16 23 11 30 8 29 26 13 3 MIN. QNH PRESSURE IN HPA 1002.6 1001.1 1001.8 1007.3 1008.4 1011.8 1012.9 1014.3 1015.6 1018.8 1009.6 1012.9 1001.1 DAY 31 29 30 30 28 28 27 15 12 17 8 10 MEAN QFF PRESSURE IN HPA 1023.3 1018.2 1014.3 1013.7 1010.4 1008.9 1004.4 1008.8 1014.5 1022.1 1023.1 1028.3 1015.8 MAX. QFF PRESSURE IN HPA 1034.2 1030.4 1028.0 1028.5 1017.3 1019.0 1011.8 1017.2 1030.0 1029.5 1038.1 1039.1 1039.1 DAY 26 13 14 2 10 13 29 30 29 25 13 13 MIN. QFF PRESSURE IN HPA 1002.5 1003.8 1002.5 1003.2 998.6 999.8 997.1 999.4 1005.1 1012.0 1004.0 1011.6 997.1 DAY 31 29 30 27 28 28 27 15 12 17 8 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 833.4 832.1 829.4 832.3 832.2 834.1 833.1 836.1 837.2 840.4 839.0 838.9 834.8 MAX. QFE PRESSURE IN HPA 840.0 837.9 837.7 837.6 836.8 839.9 838.0 841.8 844.5 844.1 846.2 845.2 846.2 DAY 22 13 14 15 22 11 30 30 29 26 13 2 MIN. QFE PRESSURE IN HPA 823.1 820.2 821.0 824.5 823.5 827.7 829.2 830.7 832.0 833.9 827.1 829.0 820.2 DAY 31 29 30 30 28 28 19 15 12 17 8 10 MEAN QNH PRESSURE IN HPA 1018.4 1016.9 1013.7 1017.1 1016.9 1019.2 1018.1 1021.6 1022.8 1026.6 1025.0 1024.9 1020.1 MAX. QNH PRESSURE IN HPA 1026.2 1023.7 1023.5 1023.3 1022.4 1026.1 1023.8 1028.3 1031.5 1031.0 1033.5 1032.3 1033.5 DAY 22 13 14 15 22 11 30 30 29 26 13 2 MIN. QNH PRESSURE IN HPA 1006.3 1002.9 1003.8 1007.9 1006.8 1011.7 1013.5 1015.2 1016.8 1019.0 1011.0 1013.2 1002.9 DAY 31 29 30 30 28 28 19 15 12 17 8 10 MEAN QFF PRESSURE IN HPA 1024.6 1019.1 1015.1 1013.6 1009.4 1007.8 1003.7 1007.7 1012.8 1020.1 ****** 1028.9 ****** MAX. QFF PRESSURE IN HPA 1035.3 1030.1 1026.7 1027.7 1015.5 1016.3 1010.8 1016.1 1027.7 1028.4 ****** 1040.8 ****** DAY 20 13 14 1 22 11 29 30 30 25 ** 13 MIN. QFF PRESSURE IN HPA 1007.3 1005.3 1003.8 1001.4 997.7 998.1 996.7 998.8 1004.9 1009.3 ****** 1011.5 ****** DAY 31 29 30 26 28 28 27 4 12 17 ** 8 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 832.6 831.8 829.1 831.6 831.2 833.0 832.1 835.2 836.1 839.3 838.1 838.1 834.0 MAX. QFE PRESSURE IN HPA 839.4 837.4 836.1 837.5 836.6 839.0 837.6 841.4 843.4 843.1 845.1 845.2 845.2 DAY 26 13 14 16 22 11 31 7 29 25 12 2 MIN. QFE PRESSURE IN HPA 822.4 820.0 820.6 823.4 821.0 826.0 828.2 830.3 830.9 832.0 825.0 827.5 820.0 DAY 31 29 29 26 28 28 27 15 12 17 8 10 MEAN QNH PRESSURE IN HPA 1017.5 1016.5 1013.3 1016.3 1015.9 1017.9 1016.9 1020.5 1021.5 1025.4 1023.9 1023.9 1019.1 MAX. QNH PRESSURE IN HPA 1025.5 1023.1 1021.6 1023.2 1022.2 1025.0 1023.3 1027.8 1030.2 1029.8 1032.2 1032.3 1032.3 DAY 26 13 14 16 22 11 31 7 29 25 12 2 MIN. QNH PRESSURE IN HPA 1005.5 1002.6 1003.3 1006.6 1003.8 1009.7 1012.3 1014.8 1015.5 1016.8 1008.5 1011.5 1002.6 DAY 31 29 29 26 28 28 27 15 12 17 8 10 MEAN QFF PRESSURE IN HPA 1021.8 1017.5 1013.5 1012.0 1007.2 1006.0 1002.0 1006.1 1010.8 1017.8 ****** 1026.3 ****** MAX. QFF PRESSURE IN HPA 1031.9 1027.6 1022.0 1027.4 1013.9 1016.2 1009.9 1014.7 1025.1 1025.0 ****** 1035.3 ****** DAY 20 26 14 1 5 11 31 7 29 25 ** 13 MIN. QFF PRESSURE IN HPA 1005.0 1000.7 1002.8 997.6 994.0 995.4 994.7 996.7 1003.0 1006.8 ****** 1010.3 ****** DAY 30 29 29 26 28 28 27 4 12 17 ** 8 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 831.9 830.8 828.0 830.5 830.1 831.8 830.4 833.6 834.5 838.0 836.6 836.9 832.8 MAX. QFE PRESSURE IN HPA 838.5 836.8 834.6 836.2 835.3 838.4 836.0 840.4 841.8 842.0 844.2 844.0 844.2 DAY 25 26 13 16 22 11 31 7 29 25 12 2 MIN. QFE PRESSURE IN HPA 821.7 820.2 818.5 823.0 821.0 824.9 826.5 829.2 828.6 831.3 823.0 827.0 818.5 DAY 30 29 29 26 28 28 27 14 11 17 8 10 MEAN QNH PRESSURE IN HPA 1016.6 1015.3 1012.1 1015.0 1014.5 1016.5 1014.9 1018.7 1019.7 1023.8 1022.1 1022.5 1017.7 MAX. QNH PRESSURE IN HPA 1024.4 1022.4 1019.8 1021.7 1020.6 1024.3 1021.5 1026.6 1028.3 1028.5 1031.1 1030.9 1031.1 DAY 25 26 13 16 22 11 31 7 29 25 12 2 MIN. QNH PRESSURE IN HPA 1004.6 1002.9 1000.9 1006.2 1003.8 1008.4 1010.3 1013.5 1012.8 1015.9 1006.2 1010.9 1000.9 DAY 30 29 29 26 28 28 27 14 11 17 8 10 MEAN QFF PRESSURE IN HPA 1021.0 1016.3 1012.6 1010.6 1006.2 1005.3 1000.3 1005.0 1009.7 1017.1 ****** 1025.1 ****** MAX. QFF PRESSURE IN HPA 1031.5 1026.8 1020.5 1027.0 1014.1 1016.5 1008.7 1016.0 1023.4 1024.2 ****** 1035.3 ****** DAY 20 26 13 1 5 11 2 8 29 25 ** 13 MIN. QFF PRESSURE IN HPA 1004.3 1003.6 1000.9 996.5 994.5 994.8 994.8 997.5 1000.9 1006.4 ****** 1008.4 ****** DAY 30 7 17 26 28 28 19 3 11 17 ** 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 832.3 830.9 827.9 830.7 830.3 831.6 829.8 833.6 834.7 838.1 837.0 837.2 832.9 MAX. QFE PRESSURE IN HPA 838.8 837.0 835.9 836.9 835.5 838.0 835.7 843.0 841.9 842.1 844.6 844.0 844.6 DAY 21 12 13 15 22 11 31 12 29 25 12 2 MIN. QFE PRESSURE IN HPA 821.5 820.2 818.3 822.3 823.1 825.0 825.8 828.0 827.0 832.4 823.1 826.8 818.3 DAY 30 7 29 26 27 28 27 14 11 17 8 10 MEAN QNH PRESSURE IN HPA 1017.1 1015.5 1012.0 1015.3 1014.7 1016.3 1014.2 1018.7 1019.9 1024.0 1022.7 1022.9 1017.8 MAX. QNH PRESSURE IN HPA 1024.8 1022.6 1021.4 1022.5 1020.9 1023.8 1021.1 1029.7 1028.4 1028.6 1031.6 1030.9 1031.6 DAY 21 12 13 15 22 11 31 12 29 25 12 2 MIN. QNH PRESSURE IN HPA 1004.4 1002.9 1000.6 1005.3 1006.3 1008.5 1009.5 1012.1 1010.9 1017.2 1006.3 1010.6 1000.6 DAY 30 7 29 26 27 28 27 14 11 17 8 10 MEAN QFF PRESSURE IN HPA 1023.0 1017.7 1013.4 1012.2 1007.9 1005.8 1000.7 1006.2 1011.9 1019.9 1021.7 1027.2 1014.0 MAX. QFF PRESSURE IN HPA 1033.9 1028.9 1023.6 1028.3 1015.8 1015.9 1009.6 1017.6 1026.2 1028.6 1036.7 1039.0 1039.0 DAY 19 12 13 1 22 11 31 12 29 25 13 13 MIN. QFF PRESSURE IN HPA 1004.7 1001.2 1001.3 997.3 997.1 993.6 993.2 998.1 1000.1 1010.3 1001.5 1009.5 993.2 DAY 30 7 29 26 27 25 27 14 11 16 8 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 832.9 831.4 829.0 831.7 831.6 833.0 831.3 834.6 835.9 839.0 ****** 837.8 ****** MAX. QFE PRESSURE IN HPA 840.0 837.7 837.9 837.5 836.7 839.1 837.0 841.9 843.0 842.9 ****** 845.4 ****** DAY 21 12 13 15 22 12 31 7 28 25 ** 2 MIN. QFE PRESSURE IN HPA 823.0 819.0 819.8 824.0 825.0 826.7 827.0 828.9 829.2 833.4 ****** 828.0 ****** DAY 30 28 29 26 27 27 19 14 11 17 ** 9 MEAN QNH PRESSURE IN HPA 1017.8 1016.1 1013.3 1016.4 1016.3 1018.0 1015.9 1019.9 1021.3 1025.0 ****** 1023.6 ****** MAX. QNH PRESSURE IN HPA 1026.2 1023.5 1023.7 1023.2 1022.3 1025.1 1022.6 1028.4 1029.7 1029.6 ****** 1032.5 ****** DAY 21 12 13 15 22 12 31 7 28 25 ** 2 MIN. QNH PRESSURE IN HPA 1006.2 1001.5 1002.4 1007.3 1008.5 1010.5 1010.9 1013.1 1013.5 1018.4 ****** 1012.1 ****** DAY 30 28 29 26 27 27 19 14 11 17 ** 9 MEAN QFF PRESSURE IN HPA 1023.9 1018.1 1014.7 1012.7 1008.6 1006.5 1001.6 1005.9 1011.5 1018.6 ****** 1027.7 ****** MAX. QFF PRESSURE IN HPA 1034.3 1031.0 1027.2 1030.2 1014.8 1016.7 1010.6 1016.0 1025.8 1025.8 ****** 1040.4 ****** DAY 21 12 13 1 22 12 31 7 29 25 ** 13 MIN. QFF PRESSURE IN HPA 1007.5 1004.6 1002.8 999.3 1000.5 995.6 994.8 997.2 1001.1 1009.1 ****** 1009.2 ****** DAY 30 28 29 26 27 25 19 4 11 17 ** 9 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 832.8 831.4 829.1 831.8 831.7 833.4 831.7 835.1 836.1 839.3 ****** 837.9 ****** MAX. QFE PRESSURE IN HPA 840.1 838.2 838.3 837.8 836.9 839.0 837.3 842.0 843.5 843.0 ****** 845.4 ****** DAY 21 12 13 15 22 11 31 7 29 25 ** 2 MIN. QFE PRESSURE IN HPA 822.8 818.5 819.9 825.2 825.4 827.3 820.2 829.0 829.3 834.0 ****** 828.5 ****** DAY 30 28 29 26 27 27 22 14 11 17 ** 7 MEAN QNH PRESSURE IN HPA 1017.8 1016.0 1013.3 1016.6 1016.4 1018.4 1016.4 1020.4 1021.6 1025.3 ****** 1023.7 ****** MAX. QNH PRESSURE IN HPA 1026.3 1024.1 1024.2 1023.6 1022.5 1025.0 1023.0 1028.5 1030.3 1029.7 ****** 1032.5 ****** DAY 21 12 13 15 22 11 31 7 29 25 ** 2 MIN. QNH PRESSURE IN HPA 1005.9 1000.9 1002.5 1008.8 1009.0 1011.2 1002.9 1013.2 1013.6 1019.1 ****** 1012.6 ****** DAY 30 28 29 26 27 27 22 14 11 17 ** 7 MEAN QFF PRESSURE IN HPA 1022.3 1016.8 1013.7 1012.2 1007.7 1006.7 1001.7 1006.1 1011.4 1018.3 ****** 1026.2 ****** MAX. QFF PRESSURE IN HPA 1032.5 1029.9 1026.2 1029.1 1013.9 1016.6 1009.9 1015.6 1026.0 1024.8 ****** 1036.3 ****** DAY 20 12 13 1 9 12 31 7 29 23 ** 13 MIN. QFF PRESSURE IN HPA 1005.4 1001.4 1002.6 1001.2 999.1 996.6 988.3 996.2 1000.8 1010.3 ****** 1010.2 ****** DAY 30 28 29 26 27 25 22 4 11 17 ** 7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -7.5 -4.4 4.4 8.3 13.7 18.1 22.7 23.4 20.8 11.7 4.9 1.1 9.8 MINIMUN AIR TEMPERATURE (C) -11.7 -8.9 0.1 3.1 7.8 11.3 14.5 14.3 12.5 6.4 1.2 -2.9 4.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 29 23 3 1 0 0 0 0 0 0 5 13 74 DAYS WITH FREEZING MIN.<= 0 31 25 16 7 0 0 0 0 0 0 11 22 112 TEMPERATURE RECORDS LOWEST(C) -23.0 -22.0 -6.0 -4.0 4.0 4.0 11.0 8.0 9.0 1.0 -9.0 -15.0 -23.0 DAY 10 7 30 1 4 6 5 16 29 31 24 28 MAXIMUM AIR TEMPERATURE (C) -1.5 2.0 10.0 14.9 20.8 25.3 31.0 30.8 29.4 18.7 10.6 7.5 16.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 8 21 22 12 0 0 0 63 DAYS WITH MAXIMUM TEMP. <= 0 23 10 1 0 0 0 0 0 0 0 0 3 37 TEMPERATURE RECORDS HIGHEST(C) 5.0 8.0 18.0 26.0 27.0 32.0 37.0 38.0 33.0 27.0 21.0 17.0 38.0 DAY 14 23 22 18 30 29 26 6 5 1 2 16 DIF. BETWEEN (MAX.-MIN.) (C) 10.2 10.9 9.9 11.8 13.0 14.0 16.5 16.5 16.9 12.3 9.4 10.4 12.6 MEAN DAILY TEMP. (MDT) (C) -6.6 -3.4 5.1 9.0 14.3 18.3 22.7 22.5 20.9 12.6 5.9 2.3 10.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 12.5 64.5 64.0 20.0 0.0 0.0 0.0 161.0 HEATING DEG. DAYS(BASE 18 0C) 763.5 600.5 400.5 270.5 115.5 46.0 0.0 2.0 1.0 171.0 362.5 486.5 3219.5 DEWPOINT (MEAN C) -9.4 -6.5 -0.2 2.6 7.8 10.7 12.9 12.9 9.4 5.7 1.8 -3.6 3.7 MIXING RATIO (G/KG) 2.43 3.03 4.60 5.71 8.07 9.93 11.59 11.66 9.31 6.98 5.43 3.64 6.87 VAPOUR PRESSURE (HPA) 3.25 4.05 6.12 7.58 10.70 13.12 15.23 15.35 12.33 9.31 7.24 4.86 9.10 SATURATION DEF. (HPA) 0.49 0.78 2.65 4.35 5.70 9.10 13.89 15.29 13.73 5.40 1.96 2.26 6.30 RELATIVE HUMIDITY (MEAN %) 87 86 74 72 70 65 56 54 50 70 82 74 70 RELATIVE HUMIDITY (MAX. %) 92 94 90 89 91 86 75 73 66 87 93 87 85 RELATIVE HUMIDITY (MIN. %) 79 72 57 51 49 46 40 39 36 50 64 56 53 RELATIVE HUMIDITY (MEAN% 03UTC) 87 90 84 86 86 82 74 71 65 83 89 82 82 RELATIVE HUMIDITY (MEAN% 09UTC) 83 76 61 56 53 48 44 43 39 54 70 59 57 RELATIVE HUMIDITY (MEAN% 15UTC) 88 87 72 64 63 57 47 47 47 69 84 75 67 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 20.6 14.9 102.6 102.1 37.9 62.3 1.6 7.5 0.3 63.4 49.4 12.6 475.2 DAYS WITH PRECIPITATION >=10 0 0 6 3 0 3 0 0 0 2 1 0 15 DAYS WITH PRECIPITATION >= 5 0 1 8 9 3 5 0 1 0 4 5 2 38 DAYS WITH PRECIPITATION >= 1 7 6 12 15 13 6 1 1 0 9 10 3 83 DAYS WITH PRECIPITATION 14 9 14 20 18 16 3 3 4 11 13 4 129 GREATEST DAILY PRECIPITATION 4.0 5.0 18.0 26.0 7.0 17.0 1.0 7.0 0.3 31.0 15.0 6.0 31.0 DAY 8 4 7 22 28 5 23 13 19 18 18 20 DAY WITH THUNDER STORM 0 0 0 2 6 11 1 2 3 5 1 0 31 DAYS WITH SNOW OR SLEET 12 9 8 4 0 0 0 0 0 0 1 3 37 DAYS WITH DUST 0 0 0 0 1 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) *** *** *** 135 90 90 90 90 90 90 90 90 *** PREVAILING WIND SPEED(KNOTS) **** **** **** 6.8 7.4 7.7 7.4 7.4 6.7 4.3 5.1 5.4 **** PREVAILING WIND PERCENT ***** ***** ***** 9.6 8.1 21.3 13.7 15.5 17.4 15.3 27.9 21.0 ***** CALMS PERCENT OF WIND ***** ***** ***** 79.2 69.8 63.8 67.3 69.6 62.8 66.5 60.0 64.5 ***** NO. OF WIND OBSERVATION 116 0 24 240 248 240 248 207 218 248 240 248 2277 VECTOR WIND DIRECTION (MEAN) *** *** *** 115 151 102 113 86 105 76 89 114 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** 1.3 1.0 2.1 1.4 1.8 1.6 0.7 1.6 1.0 **** WIND STEADINESES (MEAN %) ***** ***** ***** 92.9 47.6 77.8 58.3 81.8 69.6 41.2 76.2 50.0 ***** WIND SPEED (MEAN KNOTS) **** **** **** 1.4 2.1 2.7 2.4 2.2 2.3 1.7 2.1 2.0 **** FASTEST WIND DIRECTION *** *** *** 130 90 100 90 80 100 20 40 100 *** FASTEST WIND SPEED (KNOTS) *** *** *** 25 15 15 15 15 13 15 10 15 *** DAY ** ** ** 4 13 4 21 8 14 11 8 4 DAYS WITH SKY CLEAR (0-2)/8 13 8 3 6 6 17 24 26 23 12 6 12 156 DAYS WITH P.CLOUDY (3-6)/8 5 9 15 8 16 10 7 4 7 12 12 11 116 DAYS WITH CLOUDY (7-8)/8 13 11 13 16 9 3 0 1 0 7 12 8 93 DAYS WITH VISIBILITY =< 2 KM 7 6 4 0 2 0 0 0 0 1 0 1 21 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 833.9 836.7 833.6 834.7 835.3 835.6 833.4 835.3 837.3 839.2 838.0 837.2 835.8 MAX. QFE PRESSURE IN HPA 841.8 847.2 841.9 841.5 842.9 839.7 841.6 840.8 841.8 846.1 846.0 845.5 847.2 DAY-HOUR 14-18 19-12 2- 6 16- 6 11- 6 20- 6 5- 6 31- 6 9- 6 30- 6 23-18 14- 6 MIN. QFE PRESSURE IN HPA 816.0 824.3 822.4 829.0 830.6 830.6 825.8 827.0 831.5 832.2 829.8 825.6 816.0 DAY-HOUR 19-12 27- 3 14-15 1- 0 24-12 27-15 11-15 8-12 28-15 8-15 18- 3 7- 3 MEAN QNH PRESSURE IN HPA 1019.0 1022.3 1018.6 1019.9 1020.6 1021.0 1018.4 1020.6 1022.9 1025.2 1023.8 1022.9 1021.3 MAX. QNH PRESSURE IN HPA 1028.3 1034.6 1028.4 1027.9 1029.6 1025.8 1028.1 1027.1 1028.3 1033.3 1033.2 1032.6 1034.6 DAY-HOUR 14-18 19-12 2- 6 16- 6 11- 6 20- 6 5- 6 31- 6 9- 6 30- 6 23-18 14- 6 MIN. QNH PRESSURE IN HPA 997.9 1007.7 1005.5 1013.2 1015.1 1015.1 1009.5 1010.9 1016.2 1017.0 1014.2 1009.2 997.9 DAY-HOUR 19-12 27- 3 14-15 1- 0 24-12 27-15 11-15 8-12 28-15 8-15 18- 3 7- 3 MEAN QFF PRESSURE IN HPA 1027.9 1028.9 1018.2 1016.7 1013.4 1010.7 1004.9 1006.8 1011.4 1019.6 1023.1 1025.2 1017.2 MAX. QFF PRESSURE IN HPA 1040.8 1049.1 1031.4 1025.6 1022.2 1021.1 1018.2 1017.1 1017.5 1032.3 1040.9 1040.5 1049.1 DAY-HOUR 23- 6 7-18 29-18 5- 3 11- 3 8- 3 5- 3 16- 3 23- 3 12-18 24- 3 22-21 MIN. QFF PRESSURE IN HPA 1001.6 1008.4 1004.8 1006.1 1005.2 1000.9 995.4 994.1 1006.3 1006.8 1012.4 1008.8 994.1 DAY-HOUR 19-12 27- 3 6-21 19-18 24-12 27-18 2-15 7-18 28-12 9- 9 17-21 7- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 834.1 836.5 833.7 834.5 835.1 835.8 833.6 834.9 837.2 839.3 838.1 837.2 835.8 MAX. QFE PRESSURE IN HPA 841.0 845.1 841.0 840.3 841.3 839.0 841.0 838.0 839.8 844.6 846.0 844.5 846.0 DAY 15 8 2 17 11 20 5 4 10 13 24 15 MIN. QFE PRESSURE IN HPA 821.5 825.2 823.7 829.0 832.0 832.3 828.0 828.2 833.3 833.7 830.2 825.8 821.5 DAY 19 27 7 1 2 28 3 8 28 23 18 7 MEAN QNH PRESSURE IN HPA 1019.2 1022.1 1018.8 1019.7 1020.5 1021.2 1018.6 1020.2 1022.8 1025.3 1024.0 1022.9 1021.3 MAX. QNH PRESSURE IN HPA 1027.4 1032.2 1027.4 1026.5 1027.7 1025.0 1027.4 1023.8 1025.9 1031.6 1033.2 1031.5 1033.2 DAY 15 8 2 17 11 20 5 4 10 13 24 15 MIN. QNH PRESSURE IN HPA 1004.4 1008.8 1007.0 1013.2 1016.8 1017.1 1012.1 1012.3 1018.3 1018.8 1014.6 1009.5 1004.4 DAY 19 27 7 1 2 28 3 8 28 23 18 7 MEAN QFF PRESSURE IN HPA 1027.6 1028.1 1018.0 1016.6 1013.4 1011.1 1005.2 1006.3 1011.3 1019.4 1022.8 1024.6 1017.0 MAX. QFF PRESSURE IN HPA 1037.3 1046.0 1028.8 1023.4 1020.6 1020.3 1017.1 1014.8 1014.2 1031.5 1039.6 1039.3 1046.0 DAY 24 8 30 5 29 8 5 16 23 13 24 23 MIN. QFF PRESSURE IN HPA 1007.6 1008.9 1005.8 1007.2 1008.9 1004.1 998.0 995.4 1008.6 1007.6 1013.9 1008.8 995.4 DAY 19 27 7 20 24 28 15 8 28 9 18 7 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 833.9 836.5 833.7 834.7 835.4 836.0 834.0 836.0 837.9 839.2 838.0 837.2 836.0 MAX. QFE PRESSURE IN HPA 840.2 845.1 841.0 840.6 842.3 839.4 841.2 840.1 840.7 844.9 845.5 844.2 845.5 DAY 24 8 2 16 11 20 5 31 9 30 24 15 MIN. QFE PRESSURE IN HPA 819.5 824.3 824.2 830.0 832.0 832.4 828.0 828.2 833.3 833.2 829.8 825.6 819.5 DAY 19 27 7 29 2 28 12 8 28 6 18 7 MEAN QNH PRESSURE IN HPA 1019.0 1022.1 1018.8 1020.0 1020.8 1021.4 1019.1 1021.5 1023.7 1025.2 1023.9 1022.9 1021.5 MAX. QNH PRESSURE IN HPA 1026.4 1032.2 1027.4 1026.9 1028.9 1025.5 1027.6 1026.3 1027.0 1031.9 1032.6 1031.1 1032.6 DAY 24 8 2 16 11 20 5 31 9 30 24 15 MIN. QNH PRESSURE IN HPA 1002.0 1007.7 1007.6 1014.4 1016.8 1017.2 1012.1 1012.3 1018.3 1018.2 1014.2 1009.2 1002.0 DAY 19 27 7 29 2 28 12 8 28 6 18 7 MEAN QFF PRESSURE IN HPA 1029.0 1029.7 1019.2 1017.9 1014.7 1012.4 1006.9 1010.0 1013.8 1021.1 1024.2 1026.3 1018.8 MAX. QFF PRESSURE IN HPA 1038.9 1048.9 1029.0 1025.6 1022.2 1021.1 1018.2 1017.1 1017.5 1032.2 1040.9 1038.1 1048.9 DAY 26 8 30 5 11 8 5 16 23 13 24 23 MIN. QFF PRESSURE IN HPA 1005.7 1008.4 1007.3 1008.7 1009.8 1005.8 1000.2 997.5 1010.3 1009.3 1013.5 1009.0 997.5 DAY 19 27 7 20 24 28 15 8 28 9 18 7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 834.6 837.2 834.4 835.3 835.8 836.2 834.5 836.6 838.5 840.2 838.9 838.1 836.7 MAX. QFE PRESSURE IN HPA 841.5 845.2 841.9 841.5 842.9 839.7 841.6 840.8 841.8 846.1 845.7 845.5 846.1 DAY 25 7 2 16 11 20 5 31 9 30 24 14 MIN. QFE PRESSURE IN HPA 818.5 825.6 824.8 830.5 832.6 832.9 828.0 828.5 833.5 834.3 831.8 827.2 818.5 DAY 19 27 7 28 1 28 12 8 28 9 18 7 MEAN QNH PRESSURE IN HPA 1019.8 1022.9 1019.6 1020.6 1021.2 1021.7 1019.7 1022.2 1024.5 1026.4 1024.8 1023.9 1022.3 MAX. QNH PRESSURE IN HPA 1027.9 1032.3 1028.4 1027.9 1029.6 1025.8 1028.1 1027.1 1028.3 1033.3 1032.9 1032.6 1033.3 DAY 25 7 2 16 11 20 5 31 9 30 24 14 MIN. QNH PRESSURE IN HPA 1000.9 1009.2 1008.3 1015.0 1017.5 1017.8 1012.1 1012.6 1018.5 1019.5 1016.5 1011.1 1000.9 DAY 19 27 7 28 1 28 12 8 28 9 18 7 MEAN QFF PRESSURE IN HPA 1029.6 1030.3 1019.3 1017.3 1013.7 1011.1 1006.0 1006.7 1012.2 1020.7 1024.5 1027.0 1018.2 MAX. QFF PRESSURE IN HPA 1040.8 1048.9 1028.7 1025.1 1019.7 1020.0 1017.5 1014.3 1015.5 1031.3 1039.2 1038.4 1048.9 DAY 23 7 19 5 29 8 5 16 16 13 24 23 MIN. QFF PRESSURE IN HPA 1004.5 1009.8 1008.1 1009.5 1008.0 1003.6 998.5 996.2 1008.1 1008.0 1015.8 1009.7 996.2 DAY 19 27 7 20 24 28 12 8 28 9 18 7 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 834.2 837.1 834.2 835.1 835.6 835.9 833.9 836.0 837.7 839.5 838.2 837.3 836.2 MAX. QFE PRESSURE IN HPA 841.5 845.0 841.9 841.0 842.4 839.0 840.9 840.0 840.0 845.5 844.3 844.8 845.5 DAY 25 7 2 16 11 20 5 31 10 30 23 14 MIN. QFE PRESSURE IN HPA 817.5 826.9 824.4 829.7 832.2 832.4 827.5 827.9 833.0 833.3 832.5 827.2 817.5 DAY 19 27 7 28 2 28 12 8 28 9 18 7 MEAN QNH PRESSURE IN HPA 1019.4 1022.8 1019.4 1020.4 1021.0 1021.4 1019.0 1021.4 1023.5 1025.5 1024.1 1023.0 1021.7 MAX. QNH PRESSURE IN HPA 1027.9 1032.1 1028.4 1027.4 1029.0 1025.0 1027.2 1026.2 1026.2 1032.6 1031.2 1031.8 1032.6 DAY 25 7 2 16 11 20 5 31 10 30 23 14 MIN. QNH PRESSURE IN HPA 999.7 1010.8 1007.8 1014.1 1017.0 1017.2 1011.5 1011.9 1017.9 1018.3 1017.4 1011.1 999.7 DAY 19 27 7 28 2 28 12 8 28 9 18 7 MEAN QFF PRESSURE IN HPA 1027.2 1028.4 1018.3 1016.6 1013.3 1010.3 1004.7 1005.6 1010.5 1018.8 1022.4 1024.1 1016.7 MAX. QFF PRESSURE IN HPA 1038.4 1044.4 1028.0 1022.8 1019.1 1019.4 1016.6 1013.9 1013.5 1028.6 1035.7 1036.3 1044.4 DAY 25 8 29 5 11 8 5 15 22 13 23 22 MIN. QFF PRESSURE IN HPA 1003.4 1010.1 1006.9 1008.5 1007.5 1002.9 996.9 996.1 1007.0 1006.8 1015.7 1009.8 996.1 DAY 19 27 7 28 24 29 15 8 28 9 4 7 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 833.1 836.4 832.8 834.1 834.6 834.9 832.6 834.6 836.4 838.3 837.2 836.3 835.1 MAX. QFE PRESSURE IN HPA 840.7 847.2 840.0 840.4 841.0 837.5 839.2 838.5 838.7 844.0 844.0 843.7 847.2 DAY 23 19 2 16 11 20 5 31 22 12 23 14 MIN. QFE PRESSURE IN HPA 816.0 826.9 823.5 829.4 830.6 831.0 826.0 827.0 831.6 832.3 832.5 827.0 816.0 DAY 19 27 14 28 24 27 11 8 28 9 30 7 MEAN QNH PRESSURE IN HPA 1018.1 1021.9 1017.7 1019.3 1019.9 1020.2 1017.4 1019.9 1022.0 1024.1 1022.9 1021.8 1020.4 MAX. QNH PRESSURE IN HPA 1027.0 1034.6 1026.2 1026.6 1027.4 1023.2 1025.2 1024.4 1024.6 1030.9 1030.9 1030.5 1034.6 DAY 23 19 2 16 11 20 5 31 22 12 23 14 MIN. QNH PRESSURE IN HPA 997.9 1010.8 1006.8 1013.7 1015.1 1015.6 1009.7 1010.9 1016.3 1017.1 1017.4 1010.9 997.9 DAY 19 27 14 28 24 27 11 8 28 9 30 7 MEAN QFF PRESSURE IN HPA 1026.3 1027.6 1016.8 1015.9 1012.6 1009.9 1003.6 1004.7 1009.9 1018.2 1021.7 1023.4 1015.9 MAX. QFF PRESSURE IN HPA 1037.7 1042.7 1028.0 1021.8 1019.5 1017.9 1014.6 1013.0 1013.3 1030.6 1036.0 1036.2 1042.7 DAY 23 7 29 5 11 8 5 15 30 12 23 22 MIN. QFF PRESSURE IN HPA 1001.6 1010.9 1006.2 1007.3 1005.2 1001.5 996.6 995.8 1006.3 1006.8 1015.5 1009.3 995.8 DAY 19 27 7 28 24 27 2 8 28 9 4 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 833.3 836.4 832.8 834.0 834.5 834.7 831.9 834.2 836.2 838.4 837.5 836.8 835.1 MAX. QFE PRESSURE IN HPA 841.0 845.0 840.0 840.0 840.1 837.4 838.2 838.2 838.3 844.0 845.2 844.0 845.2 DAY 23 7 2 16 11 8 5 31 22 12 23 14 MIN. QFE PRESSURE IN HPA 817.0 827.0 822.4 829.8 831.0 830.6 825.8 827.1 831.5 832.2 832.8 827.0 817.0 DAY 19 27 14 27 5 27 11 8 28 8 17 6 MEAN QNH PRESSURE IN HPA 1018.3 1021.9 1017.7 1019.1 1019.7 1019.9 1016.7 1019.4 1021.7 1024.2 1023.3 1022.4 1020.4 MAX. QNH PRESSURE IN HPA 1027.4 1032.1 1026.2 1026.2 1026.3 1023.1 1024.1 1024.1 1024.2 1030.9 1032.3 1030.9 1032.3 DAY 23 7 2 16 11 8 5 31 22 12 23 14 MIN. QNH PRESSURE IN HPA 999.1 1010.9 1005.5 1014.2 1015.6 1015.1 1009.5 1011.0 1016.2 1017.0 1017.7 1010.9 999.1 DAY 19 27 14 27 5 27 11 8 28 8 17 6 MEAN QFF PRESSURE IN HPA 1028.2 1029.4 1018.1 1016.7 1013.3 1010.6 1004.1 1007.6 1011.5 1020.0 1023.6 1025.8 1017.4 MAX. QFF PRESSURE IN HPA 1038.8 1048.8 1028.8 1023.2 1019.5 1019.6 1013.6 1015.0 1015.0 1031.2 1039.3 1037.8 1048.8 DAY 23 7 29 4 11 7 5 15 30 12 23 29 MIN. QFF PRESSURE IN HPA 1002.6 1011.6 1006.8 1008.6 1009.1 1002.7 995.4 996.2 1007.6 1008.4 1016.3 1010.0 995.4 DAY 19 27 14 19 26 27 2 7 28 8 17 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 834.0 836.8 833.4 834.8 835.4 835.4 833.0 834.5 836.9 839.3 838.1 837.4 835.7 MAX. QFE PRESSURE IN HPA 841.8 845.2 841.0 840.5 840.9 838.2 839.3 838.0 839.6 845.1 846.0 845.0 846.0 DAY 14 7 2 16 11 8 4 15 9 12 23 14 MIN. QFE PRESSURE IN HPA 820.2 826.3 823.1 831.0 832.0 830.6 827.0 828.1 832.6 833.2 831.6 827.0 820.2 DAY 19 26 14 8 2 27 11 7 28 8 17 6 MEAN QNH PRESSURE IN HPA 1019.1 1022.4 1018.4 1020.0 1020.8 1020.8 1017.9 1019.7 1022.5 1025.4 1023.9 1023.1 1021.2 MAX. QNH PRESSURE IN HPA 1028.3 1032.3 1027.4 1026.8 1027.2 1024.1 1025.4 1023.8 1025.7 1032.2 1033.2 1032.1 1033.2 DAY 14 7 2 16 11 8 4 15 9 12 23 14 MIN. QNH PRESSURE IN HPA 1002.9 1010.1 1006.3 1015.6 1016.8 1015.1 1010.9 1012.2 1017.5 1018.2 1016.3 1010.9 1002.9 DAY 19 26 14 8 2 27 11 7 28 8 17 6 MEAN QFF PRESSURE IN HPA 1028.8 1029.7 1018.2 1016.6 1013.2 1010.1 1004.3 1005.3 1010.6 1019.7 1023.6 1026.3 1017.2 MAX. QFF PRESSURE IN HPA 1040.1 1049.1 1031.4 1023.0 1017.9 1020.2 1015.4 1014.5 1014.7 1032.3 1040.7 1039.9 1049.1 DAY 23 7 29 4 28 7 4 15 30 12 23 22 MIN. QFF PRESSURE IN HPA 1007.7 1009.9 1007.5 1006.1 1008.7 1000.9 997.0 994.1 1007.6 1007.7 1015.2 1009.2 994.1 DAY 19 26 14 19 25 27 14 7 28 8 17 6 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 833.9 836.9 833.5 835.0 835.6 835.8 833.6 834.9 837.2 839.5 838.0 837.4 836.0 MAX. QFE PRESSURE IN HPA 841.8 845.2 841.0 840.5 841.3 838.6 840.4 838.0 839.9 845.1 846.0 844.5 846.0 DAY 14 7 1 16 10 8 4 3 9 12 23 14 MIN. QFE PRESSURE IN HPA 821.9 825.9 824.0 830.7 832.2 832.6 827.5 828.4 833.0 833.6 830.0 827.0 821.9 DAY 19 26 6 27 2 3 2 7 28 8 17 6 MEAN QNH PRESSURE IN HPA 1019.0 1022.6 1018.6 1020.3 1021.0 1021.3 1018.7 1020.1 1022.9 1025.6 1023.9 1023.1 1021.4 MAX. QNH PRESSURE IN HPA 1028.3 1032.3 1027.4 1026.8 1027.7 1024.5 1026.6 1023.8 1026.1 1032.2 1033.2 1031.5 1033.2 DAY 14 7 1 16 10 8 4 3 9 12 23 14 MIN. QNH PRESSURE IN HPA 1004.9 1009.6 1007.3 1015.2 1017.0 1017.5 1011.5 1012.5 1017.9 1018.6 1014.4 1010.9 1004.9 DAY 19 26 6 27 2 3 2 7 28 8 17 6 MEAN QFF PRESSURE IN HPA 1027.0 1028.2 1017.6 1016.4 1013.3 1010.4 1004.7 1005.5 1010.5 1019.1 1022.4 1024.4 1016.6 MAX. QFF PRESSURE IN HPA 1037.5 1045.7 1030.6 1022.9 1020.4 1020.6 1016.1 1014.9 1015.1 1031.3 1038.7 1040.5 1045.7 DAY 23 7 29 4 10 7 4 15 30 12 23 22 MIN. QFF PRESSURE IN HPA 1010.1 1008.5 1004.8 1006.9 1009.3 1002.9 997.5 995.0 1007.7 1007.3 1012.4 1009.2 995.0 DAY 19 26 6 19 25 29 2 7 28 8 17 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.6 3.1 9.8 15.6 19.2 22.6 26.1 25.3 21.3 14.5 4.4 1.2 13.7 MINIMUN AIR TEMPERATURE (C) -1.9 -5.2 2.1 6.4 8.5 11.9 15.4 14.9 10.4 5.6 -1.7 -2.3 5.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 0 0 0 0 0 3 DAYS WITH MINIMUM TEMP. <=-4 7 18 1 0 0 0 0 0 0 0 12 15 53 DAYS WITH FREEZING MIN.<= 0 28 26 7 3 0 0 0 0 0 1 19 24 108 TEMPERATURE RECORDS LOWEST(C) -8.0 -15.0 -4.0 0.0 2.0 8.0 9.0 10.0 4.0 0.0 -11.0 -7.0 -15.0 DAY 1 1 16 6 9 12 14 5 25 26 23 13 MAXIMUM AIR TEMPERATURE (C) 6.7 8.9 15.3 21.5 25.2 28.9 32.0 31.5 27.8 20.7 9.4 4.9 19.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 4 13 24 24 9 0 0 0 77 DAYS WITH MAXIMUM TEMP. <= 0 0 2 0 0 0 0 0 0 0 0 1 6 9 TEMPERATURE RECORDS HIGHEST(C) 12.0 16.0 21.0 32.0 32.0 34.0 38.0 36.0 33.0 27.0 19.0 12.0 38.0 DAY 13 28 21 27 16 30 30 29 1 6 4 8 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 14.1 13.2 15.1 16.7 17.0 16.6 16.6 17.4 15.1 11.1 7.2 14.1 MEAN DAILY TEMP. (MDT) (C) 2.4 1.8 8.7 14.0 16.9 20.4 23.7 23.2 19.1 13.2 3.8 1.3 12.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 4.0 24.0 101.0 76.0 7.0 0.0 0.0 0.0 212.0 HEATING DEG. DAYS(BASE 18 0C) 483.5 453.0 288.5 128.0 55.0 10.0 5.0 0.0 16.0 149.5 424.5 518.5 2531.5 DEWPOINT (MEAN C) -2.3 -4.7 -0.9 2.3 5.5 9.3 11.7 10.9 5.2 2.4 -2.4 -1.8 2.9 MIXING RATIO (G/KG) 3.93 3.32 4.44 5.56 7.00 9.02 11.00 10.05 6.93 5.57 3.99 4.16 6.25 VAPOUR PRESSURE (HPA) 5.24 4.44 5.91 7.38 9.32 11.91 14.41 13.24 9.19 7.43 5.34 5.55 8.28 SATURATION DEF. (HPA) 1.82 3.88 6.84 11.69 14.11 17.13 21.49 20.60 17.87 10.23 3.76 1.41 10.90 RELATIVE HUMIDITY (MEAN %) 77 61 52 45 44 46 44 43 39 48 64 82 54 RELATIVE HUMIDITY (MAX. %) 90 87 76 67 67 73 63 67 59 71 81 93 75 RELATIVE HUMIDITY (MIN. %) 56 40 36 31 30 31 33 31 26 33 51 67 39 RELATIVE HUMIDITY (MEAN% 03UTC) 86 86 73 66 67 72 63 66 59 71 78 91 73 RELATIVE HUMIDITY (MEAN% 09UTC) 62 43 43 38 34 35 35 35 29 37 52 71 43 RELATIVE HUMIDITY (MEAN% 15UTC) 80 64 49 41 39 43 41 39 37 48 70 88 53 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 17.3 4.2 46.2 7.2 19.7 61.1 8.1 0.6 0.0 23.2 35.0 20.7 243.3 DAYS WITH PRECIPITATION >=10 0 0 2 0 0 2 0 0 0 1 1 0 6 DAYS WITH PRECIPITATION >= 5 1 0 5 0 2 3 1 0 0 2 1 1 16 DAYS WITH PRECIPITATION >= 1 7 1 7 3 4 11 3 0 0 5 6 8 55 DAYS WITH PRECIPITATION 13 3 10 8 11 14 4 1 1 11 8 9 93 GREATEST DAILY PRECIPITATION 6.0 3.0 12.0 4.0 8.1 21.0 5.0 0.6 0.0 11.0 20.0 6.0 21.0 DAY 5 6 23 19 26 12 26 26 ** 13 21 5 DAY WITH THUNDER STORM 0 0 1 1 4 13 4 1 0 4 0 0 28 DAYS WITH SNOW OR SLEET 9 2 1 1 0 0 0 0 0 0 3 5 21 DAYS WITH DUST 0 0 0 1 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 90 180 180 270 90 180 90 90 90 90 90 90 90 PREVAILING WIND SPEED(KNOTS) 5.7 4.7 6.7 9.5 5.3 7.0 7.5 7.6 5.1 5.2 5.8 4.7 5.6 PREVAILING WIND PERCENT 18.6 12.9 21.3 20.0 21.3 14.7 19.4 23.2 18.7 20.0 22.0 16.1 16.3 CALMS PERCENT OF WIND 62.8 69.3 45.2 37.3 49.7 60.0 52.9 59.4 52.0 62.6 63.8 73.5 57.4 NO. OF WIND OBSERVATION 215 140 155 150 155 150 155 155 150 155 127 155 1862 VECTOR WIND DIRECTION (MEAN) 139 182 206 226 114 190 104 84 101 116 103 116 147 VECTOR WIND MAGNITUDE(KNOTS) 1.2 0.9 2.2 3.7 0.9 1.1 1.7 2.4 1.5 1.2 1.0 0.7 0.9 WIND STEADINESES (MEAN %) 52.2 56.3 62.9 71.2 30.0 45.8 50.0 82.8 51.7 57.1 43.5 58.3 33.3 WIND SPEED (MEAN KNOTS) 2.3 1.6 3.5 5.2 3.0 2.4 3.4 2.9 2.9 2.1 2.3 1.2 2.7 FASTEST WIND DIRECTION 180 210 200 200 240 180 30 30 120 270 210 90 200 FASTEST WIND SPEED (KNOTS) 15 15 20 25 15 20 18 20 18 12 15 8 25 DAY 31 17 14 11 2 9 13 3 10 7 20 1 DAYS WITH SKY CLEAR (0-2)/8 2 21 8 6 11 21 30 29 29 20 9 5 191 DAYS WITH P.CLOUDY (3-6)/8 17 6 16 15 18 8 1 2 1 10 8 12 114 DAYS WITH CLOUDY (7-8)/8 12 1 7 9 2 1 0 0 0 1 9 11 53 DAYS WITH VISIBILITY =< 2 KM 0 0 0 1 0 0 0 0 0 0 1 6 8 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 835.3 836.7 833.7 833.7 837.1 833.2 830.6 833.2 834.8 837.4 838.9 836.1 835.1 MAX. QFE PRESSURE IN HPA 843.7 844.0 841.0 843.3 848.0 838.2 839.2 839.5 841.0 844.1 845.2 842.8 848.0 DAY-HOUR 14- 6 13- 6 1- 6 24- 9 13- 6 13- 3 15- 6 4- 3 24- 6 22- 6 4- 6 5- 6 MIN. QFE PRESSURE IN HPA 820.2 827.3 823.2 822.0 830.2 825.8 821.1 825.8 827.5 832.0 829.1 825.9 820.2 DAY-HOUR 31-12 5-12 14-12 20- 3 1-15 20-15 10-15 7-15 10-12 26-15 30-12 1- 6 MEAN QNH PRESSURE IN HPA 1020.6 1022.3 1018.8 1018.8 1022.7 1018.2 1015.1 1018.1 1020.0 1023.1 1024.8 1021.5 1020.4 MAX. QNH PRESSURE IN HPA 1030.5 1030.9 1027.4 1030.1 1035.6 1024.1 1025.2 1025.6 1027.4 1031.0 1032.3 1029.5 1035.6 DAY-HOUR 14- 6 13- 6 1- 6 24- 9 13- 6 13- 3 15- 6 4- 3 24- 6 22- 6 4- 6 5- 6 MIN. QNH PRESSURE IN HPA 1002.9 1011.2 1006.4 1005.0 1014.6 1009.5 1003.9 1009.5 1011.5 1016.8 1013.4 1009.6 1002.9 DAY-HOUR 31-12 5-12 14-12 20- 3 1-15 20-15 10-15 7-15 10-12 26-15 30-12 1- 6 MEAN QFF PRESSURE IN HPA 1022.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1032.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 12-18 **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1006.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 30- 3 **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 836.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 842.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 14 ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 830.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 5 ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1021.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1028.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 14 ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1014.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 5 ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1022.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1031.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 20 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1012.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 17 ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 834.9 836.8 834.0 834.1 837.7 834.1 831.6 834.3 835.5 837.9 839.2 836.1 835.5 MAX. QFE PRESSURE IN HPA 842.0 842.6 840.2 842.2 847.0 838.2 838.5 839.5 839.8 843.3 844.1 841.5 847.0 DAY 14 13 1 24 13 13 15 4 24 22 5 19 MIN. QFE PRESSURE IN HPA 823.0 829.1 825.5 822.0 832.7 830.0 824.0 828.7 831.0 833.8 831.0 826.2 822.0 DAY 30 3 24 20 1 20 10 7 1 28 30 1 MEAN QNH PRESSURE IN HPA 1020.2 1022.4 1019.1 1019.2 1023.4 1019.3 1016.3 1019.4 1020.9 1023.6 1025.2 1021.6 1020.9 MAX. QNH PRESSURE IN HPA 1028.5 1029.2 1026.4 1028.8 1034.4 1024.1 1024.4 1025.6 1025.9 1030.1 1031.0 1027.9 1034.4 DAY 14 13 1 24 13 13 15 4 24 22 5 19 MIN. QNH PRESSURE IN HPA 1006.2 1013.4 1009.1 1005.0 1017.6 1014.4 1007.3 1012.9 1015.6 1018.9 1015.6 1009.9 1005.0 DAY 30 3 24 20 1 20 10 7 1 28 30 1 MEAN QFF PRESSURE IN HPA 1023.0 1026.5 1017.4 1013.7 1015.6 1009.0 1003.5 1007.3 1012.2 1019.2 1027.3 1024.9 1016.6 MAX. QFF PRESSURE IN HPA 1031.7 1033.3 1027.6 1026.6 1026.8 1017.8 1016.5 1016.5 1020.6 1026.4 1038.3 1033.8 1038.3 DAY 20 13 1 24 13 13 15 4 24 22 23 19 MIN. QFF PRESSURE IN HPA 1006.6 1016.3 1004.5 999.7 1011.1 1002.3 994.4 1000.7 1004.2 1011.9 1017.1 1011.4 994.4 DAY 30 23 24 20 26 20 9 16 2 28 30 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 835.9 837.8 834.8 834.7 838.3 834.3 832.1 834.8 836.1 838.5 839.9 836.8 836.2 MAX. QFE PRESSURE IN HPA 843.7 844.0 841.0 843.2 848.0 838.2 839.2 839.3 841.0 844.1 845.2 842.8 848.0 DAY 14 13 1 24 13 13 15 4 24 22 4 5 MIN. QFE PRESSURE IN HPA 823.7 830.2 825.1 824.0 833.2 829.2 824.0 829.1 831.3 834.2 831.0 825.9 823.7 DAY 31 3 24 20 1 20 10 7 1 28 30 1 MEAN QNH PRESSURE IN HPA 1021.4 1023.6 1020.1 1019.9 1024.1 1019.5 1016.9 1020.0 1021.5 1024.4 1026.0 1022.4 1021.7 MAX. QNH PRESSURE IN HPA 1030.5 1030.9 1027.4 1029.9 1035.6 1024.1 1025.2 1025.4 1027.4 1031.0 1032.3 1029.5 1035.6 DAY 14 13 1 24 13 13 15 4 24 22 4 5 MIN. QNH PRESSURE IN HPA 1007.0 1014.6 1008.6 1007.3 1018.2 1013.5 1007.3 1013.4 1015.9 1019.4 1015.6 1009.6 1007.0 DAY 31 3 24 20 1 20 10 7 1 28 30 1 MEAN QFF PRESSURE IN HPA 1024.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1032.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 12 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1013.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 17 ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 835.0 837.0 834.2 834.1 837.4 833.6 831.0 833.5 835.2 837.9 839.1 836.4 835.3 MAX. QFE PRESSURE IN HPA 842.0 843.5 839.2 843.3 847.5 837.8 838.3 838.3 840.0 844.0 844.5 842.8 847.5 DAY 13 13 1 24 13 13 15 24 24 22 4 5 MIN. QFE PRESSURE IN HPA 822.0 828.0 824.0 824.7 832.5 828.1 823.0 828.0 830.1 834.0 830.0 826.0 822.0 DAY 30 5 24 20 26 20 9 7 10 28 30 1 MEAN QNH PRESSURE IN HPA 1020.2 1022.7 1019.3 1019.2 1023.1 1018.6 1015.6 1018.5 1020.5 1023.7 1025.1 1021.9 1020.7 MAX. QNH PRESSURE IN HPA 1028.5 1030.3 1025.2 1030.1 1035.0 1023.6 1024.2 1024.2 1026.2 1030.9 1031.5 1029.5 1035.0 DAY 13 13 1 24 13 13 15 24 24 22 4 5 MIN. QNH PRESSURE IN HPA 1005.0 1012.1 1007.3 1008.2 1017.4 1012.2 1006.2 1012.1 1014.5 1019.1 1014.4 1009.7 1005.0 DAY 30 5 24 20 26 20 9 7 10 28 30 1 MEAN QFF PRESSURE IN HPA 1022.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1029.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 13 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1010.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 5 ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 834.2 836.0 833.0 833.0 836.3 832.3 829.4 832.0 833.7 836.5 838.1 835.5 834.2 MAX. QFE PRESSURE IN HPA 841.0 842.0 837.5 842.0 845.2 837.1 837.0 837.0 839.0 842.9 843.0 842.1 845.2 DAY 13 13 1 24 13 13 15 4 24 22 4 5 MIN. QFE PRESSURE IN HPA 820.2 827.3 823.2 824.8 831.5 826.5 821.2 826.0 827.5 832.7 829.1 827.0 820.2 DAY 31 5 14 20 1 8 9 7 10 15 30 1 MEAN QNH PRESSURE IN HPA 1019.3 1021.4 1017.9 1017.9 1021.8 1017.1 1013.7 1016.8 1018.8 1022.1 1023.9 1020.9 1019.3 MAX. QNH PRESSURE IN HPA 1027.4 1028.5 1023.2 1028.5 1032.3 1022.8 1022.6 1022.6 1025.0 1029.6 1029.7 1028.6 1032.3 DAY 13 13 1 24 13 13 15 4 24 22 4 5 MIN. QNH PRESSURE IN HPA 1002.9 1011.2 1006.4 1008.3 1016.2 1010.3 1004.1 1009.7 1011.5 1017.6 1013.4 1010.9 1002.9 DAY 31 5 14 20 1 8 9 7 10 15 30 1 MEAN QFF PRESSURE IN HPA 1021.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1029.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 12 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1011.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 5 ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 834.7 836.2 832.8 832.9 835.9 832.0 829.1 831.3 833.4 836.4 838.0 835.6 834.0 MAX. QFE PRESSURE IN HPA 841.3 842.0 837.0 841.0 844.2 837.4 836.0 837.2 838.8 842.9 843.0 842.0 844.2 DAY 13 13 1 24 13 13 15 24 24 22 4 5 MIN. QFE PRESSURE IN HPA 822.5 827.8 824.0 827.0 830.2 825.8 821.1 825.8 827.5 832.0 829.1 828.1 821.1 DAY 30 5 14 20 1 20 10 7 10 26 30 9 MEAN QNH PRESSURE IN HPA 1019.9 1021.7 1017.7 1017.8 1021.4 1016.8 1013.3 1015.9 1018.4 1021.9 1023.9 1021.0 1019.1 MAX. QNH PRESSURE IN HPA 1027.7 1028.5 1022.6 1027.4 1031.1 1023.1 1021.5 1022.9 1024.8 1029.6 1029.7 1028.5 1031.1 DAY 13 13 1 24 13 13 15 24 24 22 4 5 MIN. QNH PRESSURE IN HPA 1005.6 1011.8 1007.3 1010.9 1014.6 1009.5 1003.9 1009.5 1011.5 1016.8 1013.4 1012.2 1003.9 DAY 30 5 14 20 1 20 10 7 10 26 30 9 MEAN QFF PRESSURE IN HPA 1022.7 1025.5 1015.8 1012.1 1013.5 1006.2 1000.2 1003.6 1009.5 1017.5 1025.9 1024.2 1014.7 MAX. QFF PRESSURE IN HPA 1031.4 1032.6 1024.0 1024.0 1021.9 1016.5 1013.2 1012.1 1018.8 1028.0 1038.6 1032.1 1038.6 DAY 12 13 16 24 13 13 14 4 24 31 22 20 MIN. QFF PRESSURE IN HPA 1007.1 1015.5 1002.5 1004.1 1007.7 998.0 990.7 996.0 1000.1 1011.1 1014.4 1009.7 990.7 DAY 30 22 14 20 31 30 8 16 10 27 20 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 836.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 842.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 12 ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 831.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 5 ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1022.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1029.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 12 ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1015.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 5 ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1024.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1032.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 12 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1015.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 836.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 842.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 12 ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 831.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1021.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1028.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 12 ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1015.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1022.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1031.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 19 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1013.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.8 -3.2 4.6 16.1 17.5 ***** ***** 25.5 21.8 15.0 5.3 0.7 ***** MINIMUN AIR TEMPERATURE (C) -4.4 -8.6 -1.7 6.7 8.6 12.2 16.4 15.3 10.4 5.9 -0.8 -4.7 4.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 21 25 9 0 0 0 0 0 0 0 7 16 78 DAYS WITH FREEZING MIN.<= 0 29 28 19 1 0 0 0 0 0 1 18 28 124 TEMPERATURE RECORDS LOWEST(C) -10.0 -20.0 -15.0 0.0 2.0 5.0 12.0 11.0 6.0 0.0 -11.0 -18.0 -20.0 DAY 3 21 9 2 3 6 3 26 19 8 21 15 MAXIMUM AIR TEMPERATURE (C) 8.6 0.9 9.3 21.8 23.4 29.4 32.3 32.6 28.5 20.8 10.3 5.8 18.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 5 18 29 25 11 0 0 0 89 DAYS WITH MAXIMUM TEMP. <= 0 3 17 2 0 0 0 0 0 0 0 2 4 28 TEMPERATURE RECORDS HIGHEST(C) 16.0 7.0 20.0 30.0 31.0 35.0 36.0 40.0 36.0 27.0 19.0 12.0 40.0 DAY 29 3 16 22 25 22 7 8 2 1 11 7 DIF. BETWEEN (MAX.-MIN.) (C) 13.0 9.5 11.0 15.1 14.8 17.2 15.9 17.3 18.1 14.9 11.1 10.5 14.0 MEAN DAILY TEMP. (MDT) (C) 2.1 -3.8 3.8 14.3 16.0 20.8 24.4 24.0 19.4 13.4 4.7 0.5 11.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.5 45.5 106.5 101.0 16.0 0.0 0.0 0.0 269.5 HEATING DEG. DAYS(BASE 18 0C) 492.5 611.5 441.0 119.5 77.5 19.5 0.0 0.5 10.0 143.5 398.5 542.0 2856.0 DEWPOINT (MEAN C) -3.7 -5.8 -0.5 2.4 5.5 ***** ***** 10.1 5.7 5.3 -0.4 -2.9 ***** MIXING RATIO (G/KG) 3.56 3.09 4.58 5.55 6.90 ****** ****** 9.60 7.11 6.88 4.56 3.81 ****** VAPOUR PRESSURE (HPA) 4.76 4.10 6.09 7.38 9.14 ****** ****** 12.62 9.40 9.16 6.09 5.10 ****** SATURATION DEF. (HPA) 3.22 0.99 3.23 12.43 12.16 ****** ****** 22.20 18.54 8.91 3.60 1.70 ****** RELATIVE HUMIDITY (MEAN %) 67 84 72 45 50 *** *** 42 39 55 70 79 *** RELATIVE HUMIDITY (MAX. %) 86 93 87 73 77 *** 57 65 59 73 84 91 *** RELATIVE HUMIDITY (MIN. %) 47 72 61 30 33 *** 24 28 25 43 57 66 *** RELATIVE HUMIDITY (MEAN% 03UTC) 84 88 86 71 75 *** 57 65 59 73 82 87 *** RELATIVE HUMIDITY (MEAN% 09UTC) 49 80 65 36 40 *** 30 34 31 47 63 70 *** RELATIVE HUMIDITY (MEAN% 15UTC) 71 86 73 37 46 *** 30 34 34 55 73 82 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 5.8 27.5 42.0 18.5 57.6 29.1 0.0 0.0 0.0 9.7 22.3 34.0 246.5 DAYS WITH PRECIPITATION >=10 0 0 1 0 1 1 0 0 0 0 1 2 6 DAYS WITH PRECIPITATION >= 5 0 3 1 1 5 2 0 0 0 1 2 2 17 DAYS WITH PRECIPITATION >= 1 2 8 9 6 15 4 0 0 0 3 4 3 54 DAYS WITH PRECIPITATION 6 12 16 8 19 5 0 0 0 6 4 7 83 GREATEST DAILY PRECIPITATION 4.6 7.0 17.0 9.0 12.2 16.0 0.0 0.0 0.0 6.0 11.1 16.0 17.0 DAY 20 20 22 6 11 2 ** ** ** 23 20 27 DAY WITH THUNDER STORM 0 0 2 2 13 3 0 0 0 2 0 0 22 DAYS WITH SNOW OR SLEET 4 11 9 0 0 0 0 0 0 0 3 5 32 DAYS WITH DUST 0 0 0 0 2 3 0 0 0 0 0 0 5 WIND DIRECTION (PREVAILING) 90 90 90 180 90 *** *** 45 180 180 360 45 *** PREVAILING WIND SPEED(KNOTS) 5.2 6.8 5.7 7.7 5.5 **** **** 8.5 6.0 6.7 10.5 7.5 **** PREVAILING WIND PERCENT 25.2 15.0 23.2 28.0 24.5 ***** ***** 9.0 17.3 17.4 9.3 7.1 ***** CALMS PERCENT OF WIND 52.3 57.1 44.5 42.0 38.1 ***** ***** 75.5 39.3 34.8 67.3 79.4 ***** NO. OF WIND OBSERVATION 155 140 155 150 155 46 95 155 150 155 150 155 1661 VECTOR WIND DIRECTION (MEAN) 102 131 121 190 163 *** *** 44 83 145 48 51 *** VECTOR WIND MAGNITUDE(KNOTS) 1.2 1.2 2.0 2.6 1.1 **** **** 1.1 1.0 1.3 0.8 0.7 **** WIND STEADINESES (MEAN %) 48.0 50.0 55.6 66.7 30.6 ***** ***** 61.1 27.0 35.1 28.6 53.8 ***** WIND SPEED (MEAN KNOTS) 2.5 2.4 3.6 3.9 3.6 **** **** 1.8 3.7 3.7 2.8 1.3 **** FASTEST WIND DIRECTION 40 90 40 190 100 *** *** 360 90 30 260 210 *** FASTEST WIND SPEED (KNOTS) 15 25 25 22 20 *** *** 12 15 13 15 10 *** DAY 20 25 22 24 9 ** ** 25 1 28 7 6 DAYS WITH SKY CLEAR (0-2)/8 16 7 5 12 11 8 15 28 29 21 7 12 171 DAYS WITH P.CLOUDY (3-6)/8 8 6 18 10 11 2 4 3 1 7 11 7 88 DAYS WITH CLOUDY (7-8)/8 7 15 8 8 9 0 0 0 0 3 12 12 74 DAYS WITH VISIBILITY =< 2 KM 2 6 4 1 1 0 1 0 0 0 2 6 23 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 835.7 831.3 833.7 835.8 833.2 ****** ****** 831.0 832.7 837.2 838.1 838.8 ****** MAX. QFE PRESSURE IN HPA 856.8 859.0 858.3 857.0 838.3 ****** ****** 855.3 839.7 866.2 844.5 851.7 ****** DAY-HOUR 5- 3 3- 6 15- 3 3- 9 5- 6 **-** **-** 29- 9 24- 6 1- 6 3- 6 15- 6 MIN. QFE PRESSURE IN HPA 826.8 818.0 825.0 825.1 825.8 ****** ****** 826.1 826.5 830.0 832.0 831.2 ****** DAY-HOUR 31-12 20- 3 1- 3 6-12 18-15 **-** **-** 9-15 11-15 11-15 19-15 20-12 MEAN QNH PRESSURE IN HPA 1021.1 1016.0 1018.7 1021.3 1018.2 ****** ****** 1015.6 1017.6 1022.9 1024.0 1024.8 ****** MAX. QNH PRESSURE IN HPA 1045.9 1048.5 1047.7 1046.2 1024.2 ****** ****** 1044.2 1025.8 1057.0 1031.5 1039.9 ****** DAY-HOUR 5- 3 3- 6 15- 3 3- 9 5- 6 **-** **-** 29- 9 24- 6 1- 6 3- 6 15- 6 MIN. QNH PRESSURE IN HPA 1010.6 1000.3 1008.5 1008.6 1009.5 ****** ****** 1009.8 1010.3 1014.4 1016.8 1015.8 ****** DAY-HOUR 31-12 20- 3 1- 3 6-12 18-15 **-** **-** 9-15 11-15 11-15 19-15 20-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 835.9 832.4 833.8 835.5 833.6 ****** 831.4 831.8 833.5 837.3 838.2 838.8 ****** MAX. QFE PRESSURE IN HPA 856.8 854.5 858.3 842.0 838.0 ****** 834.2 835.8 839.2 844.0 844.0 843.0 ****** DAY 5 2 15 9 5 ** 15 29 24 20 3 14 MIN. QFE PRESSURE IN HPA 830.0 818.0 825.0 826.2 826.9 ****** 829.0 828.5 828.5 831.0 833.2 832.0 ****** DAY 20 20 1 6 19 ** 26 16 12 12 24 20 MEAN QNH PRESSURE IN HPA 1021.4 1017.3 1018.9 1020.9 1018.6 ****** 1016.1 1016.5 1018.5 1023.0 1024.0 1024.8 ****** MAX. QNH PRESSURE IN HPA 1045.9 1043.2 1047.7 1028.5 1023.8 ****** 1019.4 1021.2 1025.2 1030.9 1030.9 1029.7 ****** DAY 5 2 15 9 5 ** 15 29 24 20 3 14 MIN. QNH PRESSURE IN HPA 1014.4 1000.3 1008.5 1009.9 1010.8 ****** 1013.2 1012.6 1012.6 1015.6 1018.2 1016.8 ****** DAY 20 20 1 6 19 ** 26 16 12 12 24 20 MEAN QFF PRESSURE IN HPA 1025.1 1024.5 1020.6 1015.0 1011.4 ****** 1003.0 1003.9 1009.0 1017.9 1025.2 1029.4 ****** MAX. QFF PRESSURE IN HPA 1052.8 1053.6 1048.1 1026.7 1019.3 ****** 1007.3 1011.6 1018.8 1026.6 1037.0 1043.5 ****** DAY 5 22 15 9 3 ** 15 25 24 20 22 15 MIN. QFF PRESSURE IN HPA 1013.7 1005.4 1010.3 1005.0 1004.6 ****** 998.7 997.9 1002.0 1007.9 1018.4 1016.9 ****** DAY 31 20 22 6 29 ** 26 9 12 12 19 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 836.0 831.3 834.0 837.0 833.9 ****** 832.0 832.1 834.1 839.1 838.9 839.7 ****** MAX. QFE PRESSURE IN HPA 841.0 859.0 838.8 855.0 838.3 ****** 835.6 836.2 839.7 866.2 844.5 851.7 ****** DAY 2 3 14 4 5 ** 15 29 24 1 3 15 MIN. QFE PRESSURE IN HPA 831.2 820.0 826.0 827.0 827.0 ****** 829.7 828.5 829.6 831.0 834.6 833.0 ****** DAY 19 20 1 6 19 ** 26 16 12 12 25 20 MEAN QNH PRESSURE IN HPA 1021.4 1015.9 1019.1 1022.7 1019.0 ****** 1016.7 1016.8 1019.2 1025.2 1024.9 1025.9 ****** MAX. QNH PRESSURE IN HPA 1027.4 1048.5 1024.8 1043.8 1024.2 ****** 1021.0 1021.7 1025.8 1057.0 1031.5 1039.9 ****** DAY 2 3 14 4 5 ** 15 29 24 1 3 15 MIN. QNH PRESSURE IN HPA 1015.8 1002.6 1009.7 1010.9 1010.9 ****** 1014.1 1012.6 1013.9 1015.6 1019.8 1017.9 ****** DAY 19 20 1 6 19 ** 26 16 12 12 25 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 835.6 830.4 833.9 836.8 833.6 ****** 831.3 832.6 833.4 837.7 838.7 839.3 ****** MAX. QFE PRESSURE IN HPA 841.5 838.2 839.2 857.0 837.9 ****** 834.2 855.3 838.1 846.0 844.3 844.5 ****** DAY 2 3 14 3 4 ** 14 29 24 20 3 14 MIN. QFE PRESSURE IN HPA 830.0 818.0 826.0 826.2 826.6 ****** 829.0 828.0 828.9 830.2 834.0 832.1 ****** DAY 19 25 1 6 19 ** 25 16 11 12 25 20 MEAN QNH PRESSURE IN HPA 1021.0 1014.9 1019.0 1022.4 1018.6 ****** 1015.9 1017.4 1018.4 1023.4 1024.7 1025.4 ****** MAX. QNH PRESSURE IN HPA 1027.9 1024.1 1025.2 1046.2 1023.7 ****** 1019.4 1044.2 1023.9 1033.2 1031.2 1031.5 ****** DAY 2 3 14 3 4 ** 14 29 24 20 3 14 MIN. QNH PRESSURE IN HPA 1014.4 1000.3 1009.7 1009.9 1010.4 ****** 1013.2 1012.1 1013.1 1014.6 1019.1 1016.9 ****** DAY 19 25 1 6 19 ** 25 16 11 12 25 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 834.4 831.7 833.1 835.0 832.7 ****** 830.0 829.6 831.5 836.1 837.5 838.1 ****** MAX. QFE PRESSURE IN HPA 840.5 857.8 839.0 842.5 837.5 ****** 833.0 833.7 836.4 845.0 842.5 843.0 ****** DAY 2 2 14 8 4 ** 14 29 24 20 3 14 MIN. QFE PRESSURE IN HPA 826.8 818.5 825.7 825.1 827.5 ****** 827.0 827.0 826.7 830.0 832.2 831.2 ****** DAY 31 25 1 6 9 ** 25 9 11 12 19 20 MEAN QNH PRESSURE IN HPA 1019.6 1016.4 1018.0 1020.3 1017.6 ****** 1014.4 1014.0 1016.2 1021.5 1023.2 1024.0 ****** MAX. QNH PRESSURE IN HPA 1026.8 1047.1 1025.0 1029.1 1023.2 ****** 1017.9 1018.8 1021.9 1032.1 1029.1 1029.7 ****** DAY 2 2 14 8 4 ** 14 29 24 20 3 14 MIN. QNH PRESSURE IN HPA 1010.6 1000.9 1009.4 1008.6 1011.5 ****** 1010.9 1010.9 1010.5 1014.4 1017.0 1015.8 ****** DAY 31 25 1 6 9 ** 25 9 11 12 19 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 836.5 830.9 833.7 834.9 832.3 ****** 828.7 829.2 831.1 835.8 837.5 838.2 ****** MAX. QFE PRESSURE IN HPA 855.2 855.0 854.2 852.9 837.0 ****** 832.0 833.5 835.4 843.8 842.3 843.0 ****** DAY 14 3 8 2 4 ** 14 24 23 20 3 14 MIN. QFE PRESSURE IN HPA 827.9 820.5 826.9 825.5 825.8 ****** 822.5 826.1 826.5 830.0 832.0 831.2 ****** DAY 19 19 1 6 18 ** 23 9 11 11 19 20 MEAN QNH PRESSURE IN HPA 1022.1 1015.5 1018.8 1020.1 1017.1 ****** 1012.9 1013.4 1015.6 1021.3 1023.2 1024.1 ****** MAX. QNH PRESSURE IN HPA 1044.0 1043.8 1042.9 1041.3 1022.6 ****** 1016.8 1018.5 1020.8 1030.6 1028.9 1029.7 ****** DAY 14 3 8 2 4 ** 14 24 23 20 3 14 MIN. QNH PRESSURE IN HPA 1011.9 1003.2 1010.8 1009.1 1009.5 ****** 1005.6 1009.8 1010.3 1014.4 1016.8 1015.8 ****** DAY 19 19 1 6 18 ** 23 9 11 11 19 20 MEAN QFF PRESSURE IN HPA 1025.7 1022.6 1020.2 1014.0 1009.9 ****** 999.7 1000.7 1006.0 1016.0 1024.3 1028.6 ****** MAX. QFF PRESSURE IN HPA 1048.8 1052.8 1054.0 1040.9 1016.7 ****** 1004.5 1009.8 1013.6 1026.1 1037.2 1042.8 ****** DAY 14 9 8 2 4 ** 14 25 24 20 21 14 MIN. QFF PRESSURE IN HPA 1011.8 1007.9 1007.9 1004.8 1003.0 ****** 992.9 994.0 999.1 1007.4 1014.4 1015.6 ****** DAY 31 19 17 5 29 ** 23 9 5 12 19 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION ZANJAN (40729) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 41 N LONGITUDE 48 29 E DATA PROCESSING CENTER ELEVATION 1663.0 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.0 6.1 4.8 10.0 20.6 24.3 25.2 26.2 22.0 15.9 7.5 3.1 14.1 MINIMUN AIR TEMPERATURE (C) -3.1 -1.7 -2.1 4.1 9.3 13.1 14.4 15.0 11.1 4.6 1.3 -3.4 5.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 12 10 11 0 0 0 0 0 0 0 2 17 52 DAYS WITH FREEZING MIN.<= 0 27 19 23 5 0 0 0 0 0 0 17 30 121 TEMPERATURE RECORDS LOWEST(C) -11.0 -11.0 -11.0 0.0 2.0 8.0 10.0 11.0 6.0 1.0 -4.0 -7.0 -11.0 DAY 29 11 20 3 19 6 10 8 30 23 11 26 MAXIMUM AIR TEMPERATURE (C) 8.4 12.5 10.1 15.0 26.9 30.7 31.3 33.1 28.7 23.5 12.8 9.2 20.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 5 20 23 30 11 0 0 0 89 DAYS WITH MAXIMUM TEMP. <= 0 0 0 2 0 0 0 0 0 0 0 0 0 2 TEMPERATURE RECORDS HIGHEST(C) 15.0 17.0 20.0 24.0 31.0 39.0 35.0 37.0 32.0 27.0 24.0 13.0 39.0 DAY 20 25 31 24 27 26 1 10 12 1 1 12 DIF. BETWEEN (MAX.-MIN.) (C) 11.5 14.2 12.2 10.9 17.6 17.6 16.9 18.1 17.6 18.9 11.5 12.6 15.0 MEAN DAILY TEMP. (MDT) (C) 2.6 5.4 4.0 9.5 18.1 21.9 22.9 24.0 19.9 14.0 7.0 2.9 12.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 2.5 45.0 64.0 94.5 9.5 0.0 0.0 0.0 215.5 HEATING DEG. DAYS(BASE 18 0C) 476.0 365.0 434.0 228.5 27.5 2.5 0.0 0.0 5.0 123.0 328.5 468.0 2458.0 DEWPOINT (MEAN C) -1.1 -0.7 -0.8 4.8 7.4 9.1 11.9 10.7 9.0 4.2 1.3 -2.2 4.5 MIXING RATIO (G/KG) 4.37 4.56 4.47 6.62 7.92 8.97 10.75 9.91 8.83 6.35 5.15 3.95 6.82 VAPOUR PRESSURE (HPA) 5.82 6.06 5.93 8.76 10.50 11.80 14.07 13.00 11.67 8.47 6.88 5.30 9.02 SATURATION DEF. (HPA) 2.19 4.07 3.32 4.32 15.44 20.53 19.40 23.04 16.35 11.07 4.13 2.72 10.55 RELATIVE HUMIDITY (MEAN %) 76 64 70 72 46 41 46 41 47 48 68 70 57 RELATIVE HUMIDITY (MAX. %) 87 80 89 89 79 65 64 69 76 69 84 87 78 RELATIVE HUMIDITY (MIN. %) 65 48 55 59 31 29 34 26 31 34 54 54 43 RELATIVE HUMIDITY (MEAN% 03UTC) 83 78 87 88 79 64 64 69 76 68 83 84 77 RELATIVE HUMIDITY (MEAN% 09UTC) 69 56 63 65 37 33 38 31 35 36 58 59 48 RELATIVE HUMIDITY (MEAN% 15UTC) 78 64 68 69 37 35 45 34 45 52 71 71 56 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 10.4 4.6 23.6 58.2 0.2 25.6 1.3 0.6 10.0 1.4 35.6 4.2 175.7 DAYS WITH PRECIPITATION >=10 0 0 1 1 0 1 0 0 0 0 1 0 4 DAYS WITH PRECIPITATION >= 5 1 0 2 4 0 1 0 0 1 0 2 0 11 DAYS WITH PRECIPITATION >= 1 2 2 5 12 0 1 0 0 3 1 8 2 36 DAYS WITH PRECIPITATION 3 3 7 12 1 2 4 2 3 1 10 3 51 GREATEST DAILY PRECIPITATION 6.0 2.0 11.0 18.0 0.2 25.3 0.4 0.3 8.0 1.4 15.0 2.0 25.3 DAY 7 19 8 10 30