STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.1 2.7 8.1 13.6 20.5 25.2 27.8 26.4 22.5 16.4 9.4 4.3 14.8 MINIMUN AIR TEMPERATURE (C) -2.6 -1.3 3.2 8.3 14.3 18.9 21.9 20.9 16.9 11.6 5.3 0.6 9.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 5 23 17 1 0 0 0 46 DAYS WITH MINIMUM TEMP. <=-4 9 6 0 0 0 0 0 0 0 0 1 4 20 DAYS WITH FREEZING MIN.<= 0 27 22 5 1 0 0 0 0 0 0 5 12 72 TEMPERATURE RECORDS LOWEST(C) -6.4 -8.0 -3.5 -1.3 9.0 15.5 15.6 16.8 12.8 6.6 -5.2 -9.6 -9.6 DAY 30 7 6 2 7 27 28 26 30 23 15 29 MAXIMUM AIR TEMPERATURE (C) 5.7 7.2 13.0 18.6 25.7 30.5 33.4 31.9 28.7 22.4 15.0 9.3 20.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 19 29 26 10 0 0 0 85 DAYS WITH MAXIMUM TEMP. <= 0 0 1 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 9.6 13.8 20.4 25.6 31.2 35.4 37.3 35.9 33.6 25.4 21.8 17.0 37.3 DAY 10 28 20 19 28 13 3 12 10 6 5 8 DIF. BETWEEN (MAX.-MIN.) (C) 8.3 8.5 9.8 10.3 11.4 11.6 11.5 11.0 11.8 10.8 9.7 8.7 10.3 MEAN DAILY TEMP. (MDT) (C) 1.6 2.9 8.1 13.5 20.0 24.7 27.6 26.4 22.8 17.0 10.2 4.9 15.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 18.4 112.1 205.7 168.0 64.3 0.0 0.0 0.0 568.6 HEATING DEG. DAYS(BASE 18 0C) 509.5 437.3 306.8 141.9 13.3 0.0 0.0 0.0 0.1 41.9 235.2 404.6 2090.5 DEWPOINT (MEAN C) -3.4 -4.2 -3.6 1.7 1.6 2.1 8.8 8.0 4.3 2.4 -0.2 -2.7 1.2 MIXING RATIO (G/KG) 3.60 3.45 3.67 5.47 5.31 5.46 8.74 8.23 6.31 5.60 4.69 3.87 5.37 VAPOUR PRESSURE (HPA) 4.85 4.65 4.92 7.35 7.14 7.32 11.62 10.97 8.49 7.57 6.34 5.22 7.20 SATURATION DEF. (HPA) 1.93 3.10 6.24 9.08 17.81 25.64 26.82 24.29 19.70 11.67 6.18 3.53 13.00 RELATIVE HUMIDITY (MEAN %) 74 65 48 48 32 24 33 33 33 43 54 63 46 RELATIVE HUMIDITY (MAX. %) 91 85 67 68 50 38 49 47 47 57 72 78 62 RELATIVE HUMIDITY (MIN. %) 54 47 31 32 19 15 22 22 22 28 38 45 31 RELATIVE HUMIDITY (MEAN% 03UTC) 85 76 60 60 48 37 46 45 42 53 63 70 57 RELATIVE HUMIDITY (MEAN% 09UTC) 59 54 41 39 23 17 26 26 25 32 41 51 36 RELATIVE HUMIDITY (MEAN% 15UTC) 72 65 39 43 25 18 25 27 32 46 56 64 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 74.1 76.7 102.1 65.3 6.8 1.9 19.3 10.0 0.3 38.6 18.6 90.5 504.2 DAYS WITH PRECIPITATION >=10 5 3 5 1 0 0 1 1 0 1 0 4 21 DAYS WITH PRECIPITATION >= 5 5 5 6 5 0 0 1 1 0 2 1 4 30 DAYS WITH PRECIPITATION >= 1 8 10 7 11 2 0 3 1 0 2 5 5 54 DAYS WITH PRECIPITATION 14 17 11 16 6 6 9 1 2 5 10 9 106 GREATEST DAILY PRECIPITATION 15.0 22.0 34.6 11.3 3.8 0.9 12.0 10.0 0.3 32.0 7.8 49.0 49.0 DAY 16 17 1 27 6 30 19 25 3 16 13 17 DAY WITH THUNDER STORM 0 2 2 9 4 5 8 2 2 0 3 1 38 DAYS WITH SNOW OR SLEET 15 10 0 0 0 0 0 0 0 0 0 4 29 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 360 360 360 360 225 180 180 180 360 360 360 360 360 PREVAILING WIND SPEED(KNOTS) 4.2 4.5 4.6 5.0 7.4 5.7 4.9 4.9 4.2 4.0 4.3 4.1 4.5 PREVAILING WIND PERCENT 8.1 24.1 22.2 18.8 15.3 12.9 11.3 10.1 14.6 16.5 13.8 14.9 14.7 CALMS PERCENT OF WIND 66.5 42.7 36.3 42.5 37.1 37.9 48.8 59.3 53.8 56.5 60.8 65.3 50.7 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 65 7 280 336 233 233 224 226 217 238 305 327 251 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.7 0.5 0.2 1.7 0.7 0.5 0.6 0.5 0.4 0.3 0.2 0.3 WIND STEADINESES (MEAN %) 18.8 25.0 14.3 6.7 45.9 20.6 20.0 31.6 21.7 20.0 15.8 12.5 12.0 WIND SPEED (MEAN KNOTS) 1.6 2.8 3.5 3.0 3.7 3.4 2.5 1.9 2.3 2.0 1.9 1.6 2.5 FASTEST WIND DIRECTION 220 260 260 350 250 360 250 360 180 220 180 250 260 FASTEST WIND SPEED (KNOTS) 10 14 19 16 16 17 12 16 16 14 16 12 19 DAY 31 2 21 1 28 8 10 14 2 21 12 1 DAYS WITH SKY CLEAR (0-2)/8 8 7 15 6 22 23 28 24 25 18 13 14 203 DAYS WITH P.CLOUDY (3-6)/8 14 13 10 14 9 7 3 7 5 11 9 9 111 DAYS WITH CLOUDY (7-8)/8 9 9 6 10 0 0 0 0 0 2 8 8 52 DAYS WITH VISIBILITY =< 2 KM 7 6 0 1 0 0 0 0 0 0 1 4 19 DURATION OF SUNSHINE HOURS 122.7 123.1 214.2 171.6 329.4 325.2 348.5 328.0 308.1 243.4 167.7 156.2 2838.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 844.9 843.8 841.0 844.2 843.4 840.9 839.6 841.1 845.0 848.4 847.5 844.9 843.7 MAX. QFE PRESSURE IN HPA 855.1 853.9 850.9 853.5 850.1 847.3 846.7 847.6 850.8 854.5 855.6 852.1 855.6 DAY-HOUR 3- 6 7- 6 17- 6 9- 6 17- 6 8- 6 31- 6 21- 6 14- 6 16-18 6- 6 5- 6 MIN. QFE PRESSURE IN HPA 835.7 835.3 832.0 837.6 838.0 834.3 834.9 835.8 840.1 841.2 839.3 830.0 830.0 DAY-HOUR 29-12 2-12 5- 3 30-21 1- 0 24-15 8-15 29-15 12-12 30-12 28-12 27- 6 MEAN QNH PRESSURE IN HPA 1018.0 1016.7 1013.4 1017.1 1016.2 1013.4 1011.9 1013.6 1018.2 1022.0 1021.1 1018.0 1016.6 MAX. QNH PRESSURE IN HPA 1029.9 1028.5 1025.0 1028.0 1024.1 1020.8 1020.1 1021.2 1024.9 1029.2 1030.5 1026.4 1030.5 DAY-HOUR 3- 6 7- 6 17- 6 9- 6 17- 6 8- 6 31- 6 21- 6 14- 6 16-18 6- 6 5- 6 MIN. QNH PRESSURE IN HPA 1007.3 1006.8 1003.0 1009.5 1010.0 1005.7 1006.4 1007.4 1012.4 1013.7 1011.5 1000.7 1000.7 DAY-HOUR 29-12 2-12 5- 3 30-21 1- 0 24-15 8-15 29-15 12-12 30-12 28-12 27- 6 MEAN QFF PRESSURE IN HPA 1020.5 1018.2 1011.1 1011.2 1006.1 1000.3 997.0 999.6 1006.7 1014.4 1018.0 1018.3 1010.1 MAX. QFF PRESSURE IN HPA 1034.5 1034.8 1022.5 1025.9 1014.1 1008.6 1005.1 1006.9 1015.2 1024.8 1029.2 1033.8 1034.8 DAY-HOUR 3- 3 7- 3 17- 6 9- 6 17- 6 8- 6 31- 6 21- 6 25- 3 16-18 15-15 29-15 MIN. QFF PRESSURE IN HPA 1007.5 1003.7 1000.4 1000.6 998.6 992.8 991.0 993.2 998.5 1004.3 1008.8 1000.3 991.0 DAY-HOUR 29-12 2-12 21- 0 25- 0 28-12 23-18 17-21 2-15 12-12 30-12 10-15 27- 6 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 844.5 843.4 840.7 843.6 843.0 840.9 839.4 840.9 844.7 848.1 847.4 844.8 843.4 MAX. QFE PRESSURE IN HPA 853.9 852.2 848.9 851.9 848.8 846.4 845.3 844.5 849.6 853.3 853.3 850.5 853.9 DAY 3 7 17 9 17 8 31 21 15 17 6 30 MIN. QFE PRESSURE IN HPA 836.4 836.9 832.3 839.1 838.0 835.1 835.3 836.6 840.6 842.1 841.1 831.8 831.8 DAY 29 2 5 25 1 24 1 30 12 31 29 27 MEAN QNH PRESSURE IN HPA 1017.6 1016.3 1013.1 1016.5 1015.8 1013.4 1011.6 1013.4 1017.7 1021.7 1020.9 1017.9 1016.3 MAX. QNH PRESSURE IN HPA 1028.5 1026.5 1022.7 1026.2 1022.5 1019.8 1018.5 1017.5 1023.5 1027.8 1027.8 1024.5 1028.5 DAY 3 7 17 9 17 8 31 21 15 17 6 30 MIN. QNH PRESSURE IN HPA 1008.1 1008.7 1003.4 1011.3 1010.0 1006.6 1006.8 1008.4 1013.0 1014.8 1013.6 1002.8 1002.8 DAY 29 2 5 25 1 24 1 30 12 31 29 27 MEAN QFF PRESSURE IN HPA 1019.9 1017.4 1010.5 1010.2 1005.5 1000.3 996.6 999.1 1005.8 1013.6 1017.2 1017.8 1009.5 MAX. QFF PRESSURE IN HPA 1032.4 1033.3 1020.9 1023.7 1012.1 1007.9 1003.1 1005.1 1013.4 1022.5 1025.7 1030.5 1033.3 DAY 3 7 17 9 17 8 31 26 30 17 16 30 MIN. QFF PRESSURE IN HPA 1007.6 1004.8 1000.4 1000.6 999.6 993.6 991.1 993.7 998.7 1006.3 1008.9 1001.9 991.1 DAY 29 2 21 25 29 30 18 4 12 31 11 27 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 844.6 843.7 841.1 844.2 843.8 841.7 840.3 841.8 845.4 848.5 847.7 844.9 844.0 MAX. QFE PRESSURE IN HPA 854.1 852.7 849.7 852.3 849.6 846.4 846.3 846.1 850.0 853.4 853.8 850.6 854.1 DAY 3 7 17 9 17 8 31 21 14 17 6 30 MIN. QFE PRESSURE IN HPA 836.2 836.3 832.0 838.9 838.3 835.9 836.2 837.3 840.9 842.5 841.2 830.6 830.6 DAY 29 2 5 30 1 24 8 30 12 31 20 27 MEAN QNH PRESSURE IN HPA 1017.7 1016.6 1013.6 1017.2 1016.7 1014.2 1012.7 1014.4 1018.6 1022.2 1021.2 1018.0 1016.9 MAX. QNH PRESSURE IN HPA 1028.7 1027.1 1023.6 1026.6 1023.5 1019.8 1019.6 1019.4 1023.9 1027.9 1028.4 1024.6 1028.7 DAY 3 7 17 9 17 8 31 21 14 17 6 30 MIN. QNH PRESSURE IN HPA 1007.9 1008.0 1003.0 1011.0 1010.3 1007.5 1007.9 1009.2 1013.4 1015.2 1013.7 1001.4 1001.4 DAY 29 2 5 30 1 24 8 30 12 31 20 27 MEAN QFF PRESSURE IN HPA 1021.1 1018.7 1011.8 1012.0 1006.9 1001.4 998.0 1000.7 1008.1 1015.8 1019.3 1019.2 1011.1 MAX. QFF PRESSURE IN HPA 1034.5 1034.8 1021.6 1025.3 1013.5 1008.2 1004.6 1006.0 1015.2 1023.3 1028.8 1032.1 1034.8 DAY 3 7 17 9 17 8 31 26 25 17 16 30 MIN. QFF PRESSURE IN HPA 1008.5 1004.8 1000.5 1001.9 1001.4 995.2 992.8 995.4 1000.6 1008.2 1011.4 1001.7 992.8 DAY 29 2 5 25 29 30 18 4 12 31 11 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 845.8 844.8 842.1 845.3 844.5 842.2 840.9 842.5 846.4 849.5 848.6 845.9 844.9 MAX. QFE PRESSURE IN HPA 855.1 853.9 850.9 853.5 850.1 847.3 846.7 847.6 850.8 854.4 855.6 852.1 855.6 DAY 3 7 17 9 17 8 31 21 14 16 6 5 MIN. QFE PRESSURE IN HPA 836.8 837.6 834.4 839.7 839.7 836.2 837.0 838.4 842.0 844.2 841.6 830.0 830.0 DAY 29 2 5 30 1 24 18 30 12 31 20 27 MEAN QNH PRESSURE IN HPA 1019.0 1017.9 1014.8 1018.5 1017.6 1014.8 1013.4 1015.2 1019.8 1023.4 1022.3 1019.2 1018.0 MAX. QNH PRESSURE IN HPA 1029.9 1028.5 1025.0 1028.0 1024.1 1020.8 1020.1 1021.2 1024.9 1029.1 1030.5 1026.4 1030.5 DAY 3 7 17 9 17 8 31 21 14 16 6 5 MIN. QNH PRESSURE IN HPA 1008.6 1009.5 1005.8 1012.0 1012.0 1007.9 1008.8 1010.4 1014.6 1017.2 1014.2 1000.7 1000.7 DAY 29 2 5 30 1 24 18 30 12 31 20 27 MEAN QFF PRESSURE IN HPA 1021.6 1019.4 1012.3 1012.6 1007.4 1001.7 998.5 1001.2 1008.2 1015.6 1019.0 1019.2 1011.4 MAX. QFF PRESSURE IN HPA 1034.0 1034.1 1022.5 1025.9 1014.1 1008.6 1005.1 1006.9 1015.0 1024.7 1026.0 1030.6 1034.1 DAY 3 7 17 9 17 8 31 21 24 16 16 30 MIN. QFF PRESSURE IN HPA 1009.3 1006.8 1001.6 1003.4 1001.4 994.3 993.8 996.0 1000.9 1008.5 1010.7 1000.3 993.8 DAY 29 2 21 25 29 30 18 4 12 7 20 27 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 845.0 844.2 841.4 844.7 843.9 841.4 840.2 841.7 845.5 848.6 847.5 844.7 844.1 MAX. QFE PRESSURE IN HPA 854.5 853.0 850.0 852.3 849.2 846.5 845.9 846.9 850.5 854.3 853.5 851.0 854.5 DAY 3 7 17 9 17 12 31 21 14 16 6 5 MIN. QFE PRESSURE IN HPA 837.0 836.0 834.8 839.9 839.8 835.2 836.6 838.1 841.5 843.0 840.5 830.7 830.7 DAY 29 2 5 30 1 30 17 4 12 30 28 27 MEAN QNH PRESSURE IN HPA 1018.1 1017.1 1013.9 1017.8 1016.9 1014.0 1012.6 1014.3 1018.7 1022.3 1021.0 1017.8 1017.0 MAX. QNH PRESSURE IN HPA 1029.2 1027.4 1023.9 1026.6 1023.0 1019.9 1019.2 1020.3 1024.5 1028.9 1028.0 1025.1 1029.2 DAY 3 7 17 9 17 12 31 21 14 16 6 5 MIN. QNH PRESSURE IN HPA 1008.8 1007.7 1006.3 1012.2 1012.1 1006.7 1008.4 1010.1 1014.1 1015.8 1012.9 1001.5 1001.5 DAY 29 2 5 30 1 30 17 4 12 30 28 27 MEAN QFF PRESSURE IN HPA 1020.3 1018.3 1011.3 1011.6 1006.6 1000.9 997.6 1000.2 1006.9 1014.2 1017.4 1017.6 1010.2 MAX. QFF PRESSURE IN HPA 1032.4 1033.5 1021.6 1023.9 1013.5 1007.0 1004.0 1006.1 1013.8 1024.3 1025.2 1030.2 1033.5 DAY 3 7 17 9 6 8 31 21 30 16 15 29 MIN. QFF PRESSURE IN HPA 1009.2 1004.1 1002.9 1003.3 1000.6 993.7 992.9 995.7 1000.5 1006.7 1010.5 1003.0 992.9 DAY 29 2 21 23 29 30 18 4 12 30 28 27 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 844.1 843.1 840.1 843.4 842.6 840.2 838.8 840.3 844.1 847.5 846.6 844.1 842.9 MAX. QFE PRESSURE IN HPA 853.7 851.2 848.0 850.7 847.4 845.5 843.9 844.7 848.6 853.1 852.6 849.9 853.7 DAY 3 7 17 9 17 7 31 21 14 16 6 5 MIN. QFE PRESSURE IN HPA 835.7 835.3 834.1 838.3 838.8 834.9 835.4 836.7 840.1 841.2 839.3 831.3 831.3 DAY 29 2 5 30 1 30 8 29 12 30 28 27 MEAN QNH PRESSURE IN HPA 1017.1 1016.0 1012.5 1016.3 1015.4 1012.6 1011.0 1012.6 1017.1 1021.0 1020.0 1017.1 1015.7 MAX. QNH PRESSURE IN HPA 1028.2 1025.3 1021.6 1024.8 1020.9 1018.7 1016.8 1017.8 1022.3 1027.6 1027.0 1023.8 1028.2 DAY 3 7 17 9 17 7 31 21 14 16 6 5 MIN. QNH PRESSURE IN HPA 1007.3 1006.8 1005.4 1010.3 1010.9 1006.4 1007.0 1008.5 1012.4 1013.7 1011.5 1002.2 1002.2 DAY 29 2 5 30 1 30 8 29 12 30 28 27 MEAN QFF PRESSURE IN HPA 1019.2 1017.0 1009.9 1010.0 1005.1 999.5 996.0 998.4 1005.2 1012.9 1016.4 1017.0 1008.9 MAX. QFF PRESSURE IN HPA 1031.8 1031.2 1020.0 1022.1 1011.4 1008.1 1001.5 1004.1 1012.4 1021.7 1026.2 1030.0 1031.8 DAY 3 7 17 9 4 7 27 26 30 16 15 29 MIN. QFF PRESSURE IN HPA 1007.5 1003.7 1003.6 1001.5 998.6 993.3 991.7 993.8 998.5 1004.3 1009.0 1003.1 991.7 DAY 29 2 5 25 28 30 18 4 12 30 10 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 844.8 843.5 840.3 843.6 842.5 839.8 838.3 839.9 844.2 847.9 847.3 844.8 843.1 MAX. QFE PRESSURE IN HPA 854.2 852.0 847.8 850.6 847.0 844.9 843.7 844.8 848.6 853.9 853.2 851.1 854.2 DAY 3 6 17 8 17 7 30 21 14 16 6 29 MIN. QFE PRESSURE IN HPA 838.1 835.6 833.9 837.8 839.5 834.3 834.9 835.8 840.4 841.5 840.1 832.7 832.7 DAY 29 2 4 30 29 24 8 29 12 30 28 26 MEAN QNH PRESSURE IN HPA 1017.8 1016.4 1012.7 1016.5 1015.2 1012.0 1010.4 1012.2 1017.2 1021.5 1020.8 1017.9 1015.9 MAX. QNH PRESSURE IN HPA 1028.8 1026.3 1021.4 1024.6 1020.5 1018.0 1016.6 1017.9 1022.3 1028.5 1027.7 1025.2 1028.8 DAY 3 6 17 8 17 7 30 21 14 16 6 29 MIN. QNH PRESSURE IN HPA 1010.1 1007.2 1005.2 1009.7 1011.7 1005.7 1006.4 1007.4 1012.8 1014.1 1012.4 1003.8 1003.8 DAY 29 2 4 30 29 24 8 29 12 30 28 26 MEAN QFF PRESSURE IN HPA 1021.0 1018.4 1010.9 1011.2 1005.4 999.3 995.7 998.5 1006.6 1015.0 1018.9 1019.1 1010.0 MAX. QFF PRESSURE IN HPA 1034.3 1032.8 1019.9 1023.0 1012.2 1006.7 1003.0 1004.6 1014.1 1023.3 1029.2 1033.8 1034.3 DAY 3 7 15 9 5 7 27 21 30 16 15 29 MIN. QFF PRESSURE IN HPA 1012.0 1004.1 1003.8 1002.3 999.7 993.2 991.4 993.2 999.9 1007.1 1008.8 1004.9 991.4 DAY 29 2 3 25 28 16 16 2 12 30 10 26 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 845.3 844.1 841.1 844.5 843.4 840.6 839.4 840.7 845.1 848.5 847.9 845.2 843.8 MAX. QFE PRESSURE IN HPA 853.7 853.0 847.8 851.8 847.5 845.5 844.7 845.1 850.0 854.5 853.6 851.5 854.5 DAY 3 6 17 8 16 12 30 21 14 16 6 29 MIN. QFE PRESSURE IN HPA 838.9 836.2 833.9 838.3 840.4 834.9 835.6 836.5 841.2 842.1 840.3 833.3 833.3 DAY 28 2 4 30 24 23 17 29 1 30 28 26 MEAN QNH PRESSURE IN HPA 1018.4 1017.1 1013.6 1017.5 1016.2 1013.0 1011.7 1013.1 1018.2 1022.2 1021.5 1018.4 1016.7 MAX. QNH PRESSURE IN HPA 1028.2 1027.4 1021.4 1026.0 1021.0 1018.7 1017.8 1018.2 1023.9 1029.2 1028.1 1025.7 1029.2 DAY 3 6 17 8 16 12 30 21 14 16 6 29 MIN. QNH PRESSURE IN HPA 1011.0 1007.9 1005.2 1010.3 1012.8 1006.4 1007.2 1008.2 1013.7 1014.8 1012.7 1004.5 1004.5 DAY 28 2 4 30 24 23 17 29 1 30 28 26 MEAN QFF PRESSURE IN HPA 1020.8 1018.4 1011.1 1011.5 1005.9 999.8 996.8 999.2 1006.6 1014.4 1018.2 1018.4 1010.1 MAX. QFF PRESSURE IN HPA 1032.1 1033.4 1018.9 1023.9 1012.1 1006.3 1003.2 1005.1 1014.1 1024.8 1028.4 1032.5 1033.4 DAY 3 6 17 8 4 7 27 26 30 16 15 29 MIN. QFF PRESSURE IN HPA 1011.2 1005.3 1001.4 1002.7 999.5 992.8 991.9 994.2 999.4 1006.6 1011.3 1005.2 991.9 DAY 28 2 4 24 28 23 17 3 11 30 28 26 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 845.0 843.8 841.0 844.0 843.3 840.6 839.8 841.0 845.0 848.4 847.6 845.1 843.7 MAX. QFE PRESSURE IN HPA 853.5 852.7 848.6 852.1 848.0 845.4 845.3 845.1 849.8 854.0 853.4 851.0 854.0 DAY 2 6 16 8 16 12 30 21 14 16 6 21 MIN. QFE PRESSURE IN HPA 837.7 838.2 832.7 837.6 840.5 835.2 835.4 837.0 840.9 842.1 840.8 833.0 832.7 DAY 28 2 4 30 11 23 17 29 11 30 28 26 MEAN QNH PRESSURE IN HPA 1018.1 1016.7 1013.5 1017.0 1016.2 1013.0 1012.1 1013.5 1018.1 1022.1 1021.1 1018.2 1016.6 MAX. QNH PRESSURE IN HPA 1028.0 1027.1 1022.3 1026.4 1021.6 1018.6 1018.5 1018.2 1023.7 1028.6 1027.9 1025.1 1028.6 DAY 2 6 16 8 16 12 30 21 14 16 6 21 MIN. QNH PRESSURE IN HPA 1009.6 1010.2 1003.8 1009.5 1012.9 1006.7 1007.0 1008.8 1013.4 1014.8 1013.2 1004.2 1003.8 DAY 28 2 4 30 11 23 17 29 11 30 28 26 MEAN QFF PRESSURE IN HPA 1020.0 1017.8 1010.8 1010.7 1005.8 999.8 997.1 999.4 1006.4 1014.1 1017.6 1018.2 1009.8 MAX. QFF PRESSURE IN HPA 1032.0 1034.3 1020.0 1023.4 1012.7 1005.5 1003.3 1005.3 1013.7 1024.2 1026.7 1031.3 1034.3 DAY 2 6 16 8 5 8 30 25 24 16 15 29 MIN. QFF PRESSURE IN HPA 1009.0 1007.1 1000.7 1001.2 999.1 994.2 991.0 994.4 999.2 1006.2 1009.9 1004.3 991.0 DAY 28 1 4 24 28 30 17 3 11 30 19 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.1 -1.1 7.8 16.0 19.5 26.7 28.8 27.5 22.6 17.6 9.8 4.8 14.8 MINIMUN AIR TEMPERATURE (C) -5.9 -5.6 3.9 10.5 14.1 20.3 22.9 21.7 17.1 12.8 5.5 1.6 9.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 14 24 20 8 0 0 0 68 DAYS WITH MINIMUM TEMP. <=-4 23 17 1 0 0 0 0 0 0 0 0 0 41 DAYS WITH FREEZING MIN.<= 0 31 28 2 0 0 0 0 0 0 0 0 13 74 TEMPERATURE RECORDS LOWEST(C) -11.4 -11.0 -4.5 0.8 7.6 15.1 19.4 19.0 8.8 6.4 0.2 -2.0 -11.4 DAY 31 15 31 1 2 8 25 20 23 25 23 9 MAXIMUM AIR TEMPERATURE (C) 2.7 3.9 12.5 21.1 24.9 32.4 34.4 33.3 28.8 23.4 15.0 9.2 20.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 8 23 31 29 14 0 0 0 105 DAYS WITH MAXIMUM TEMP. <= 0 4 4 0 0 0 0 0 0 0 0 0 0 8 TEMPERATURE RECORDS HIGHEST(C) 9.0 12.0 18.8 25.8 32.4 37.8 38.0 36.0 34.4 29.0 20.6 16.4 38.0 DAY 20 28 27 28 25 30 12 4 2 8 28 1 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 9.5 8.6 10.6 10.8 12.1 11.5 11.6 11.7 10.6 9.5 7.6 10.2 MEAN DAILY TEMP. (MDT) (C) -1.6 -0.9 8.2 15.8 19.5 26.3 28.6 27.5 22.9 18.1 10.3 5.4 15.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 37.2 160.0 236.6 201.8 90.1 8.4 0.0 0.0 734.1 HEATING DEG. DAYS(BASE 18 0C) 608.2 528.7 302.6 76.3 30.5 0.0 0.0 0.0 8.3 37.8 232.3 390.9 2215.6 DEWPOINT (MEAN C) -7.1 -6.6 0.3 -1.5 2.9 3.8 8.0 7.1 4.6 1.4 -0.7 -1.6 0.9 MIXING RATIO (G/KG) 2.75 2.85 4.72 4.18 5.73 6.13 8.15 7.62 6.41 5.11 4.45 4.15 5.19 VAPOUR PRESSURE (HPA) 3.71 3.86 6.34 5.65 7.71 8.21 10.89 10.20 8.60 6.91 6.02 5.60 6.98 SATURATION DEF. (HPA) 1.69 2.02 4.56 13.17 16.24 27.85 29.76 27.54 20.21 14.05 6.47 3.21 13.90 RELATIVE HUMIDITY (MEAN %) 71 69 62 33 36 25 28 29 33 37 50 65 45 RELATIVE HUMIDITY (MAX. %) 85 86 78 48 52 39 39 39 44 50 66 82 59 RELATIVE HUMIDITY (MIN. %) 52 48 45 21 24 17 20 20 24 24 34 46 31 RELATIVE HUMIDITY (MEAN% 03UTC) 80 79 70 42 46 37 38 38 41 43 62 74 54 RELATIVE HUMIDITY (MEAN% 09UTC) 57 52 53 25 28 20 24 22 27 27 37 50 35 RELATIVE HUMIDITY (MEAN% 15UTC) 71 71 59 29 30 20 23 26 33 37 51 70 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 78.1 55.2 75.8 7.4 23.0 1.0 1.0 0.0 0.0 3.9 6.1 88.1 339.6 DAYS WITH PRECIPITATION >=10 2 2 3 0 1 0 0 0 0 0 0 3 11 DAYS WITH PRECIPITATION >= 5 7 4 5 0 1 0 0 0 0 0 0 7 24 DAYS WITH PRECIPITATION >= 1 7 6 12 2 3 1 1 0 0 2 2 9 45 DAYS WITH PRECIPITATION 13 9 17 6 8 1 1 1 1 4 5 13 79 GREATEST DAILY PRECIPITATION 21.2 18.0 16.1 3.5 19.8 1.0 1.0 0.0 0.0 2.0 3.0 31.0 31.0 DAY 12 14 11 13 7 7 16 ** ** 31 2 4 DAY WITH THUNDER STORM 0 0 6 2 5 0 2 0 0 4 3 2 24 DAYS WITH SNOW OR SLEET 13 9 1 0 0 0 0 0 0 0 0 1 24 DAYS WITH DUST 0 0 0 0 1 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 360 360 360 360 360 360 360 360 225 225 225 360 360 PREVAILING WIND SPEED(KNOTS) 4.1 4.4 4.4 5.3 4.9 4.5 4.3 3.9 3.9 5.7 7.1 3.6 4.4 PREVAILING WIND PERCENT 9.7 7.6 16.1 21.7 17.7 14.6 13.7 10.9 7.5 9.3 8.3 8.1 11.4 CALMS PERCENT OF WIND 73.0 71.0 49.6 33.3 39.9 42.9 47.6 59.3 73.3 71.4 71.7 73.4 58.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 108 117 302 279 253 230 252 227 212 230 236 72 239 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.4 0.2 0.5 1.0 0.6 0.8 0.4 0.3 0.6 0.8 R< 0.1 0.4 WIND STEADINESES (MEAN %) 16.7 30.8 8.0 13.9 30.3 20.7 33.3 23.5 33.3 40.0 50.0 2.1 20.0 WIND SPEED (MEAN KNOTS) 1.2 1.3 2.5 3.6 3.3 2.9 2.4 1.7 0.9 1.5 1.6 1.2 2.0 FASTEST WIND DIRECTION 220 160 240 300 240 180 360 350 190 210 350 27 300 FASTEST WIND SPEED (KNOTS) 12 8 17 19 16 14 12 10 8 12 12 19 19 DAY 17 12 5 18 6 16 29 17 1 21 3 5 DAYS WITH SKY CLEAR (0-2)/8 15 16 6 12 19 29 31 27 29 25 16 13 238 DAYS WITH P.CLOUDY (3-6)/8 8 5 15 14 10 1 0 4 1 5 11 13 87 DAYS WITH CLOUDY (7-8)/8 8 7 10 4 2 0 0 0 0 1 3 5 40 DAYS WITH VISIBILITY =< 2 KM 8 7 1 0 1 0 0 0 0 0 0 2 19 DURATION OF SUNSHINE HOURS 151.4 168.1 139.3 262.9 309.5 342.7 360.9 340.5 308.8 ****** 200.9 156.6 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 844.2 846.1 842.1 845.7 844.9 841.4 842.3 842.7 844.2 848.2 847.8 845.0 844.6 MAX. QFE PRESSURE IN HPA 852.5 853.3 848.5 850.4 850.0 845.8 848.1 847.7 853.9 855.6 853.0 851.3 855.6 DAY-HOUR 22- 6 4- 6 8- 6 11- 6 21- 6 26- 6 20- 6 19- 6 23- 6 27- 6 8- 6 18-18 MIN. QFE PRESSURE IN HPA 836.1 836.1 831.4 840.7 837.9 835.5 837.0 835.3 837.8 841.4 842.1 837.5 831.4 DAY-HOUR 17-12 23- 3 30- 0 29-12 31-15 10-15 5-15 1-15 13-15 2-12 25- 0 5- 3 MEAN QNH PRESSURE IN HPA 1017.2 1019.5 1014.8 1018.9 1018.0 1014.0 1015.0 1015.5 1017.2 1021.9 1021.4 1018.2 1017.6 MAX. QNH PRESSURE IN HPA 1026.9 1027.8 1022.2 1024.4 1023.9 1019.1 1021.7 1021.3 1028.5 1030.5 1027.4 1025.5 1030.5 DAY-HOUR 22- 6 4- 6 8- 6 11- 6 21- 6 26- 6 20- 6 19- 6 23- 6 27- 6 8- 6 18-18 MIN. QNH PRESSURE IN HPA 1007.8 1007.8 1002.3 1013.1 1009.9 1007.1 1008.8 1006.8 1009.7 1013.9 1014.8 1009.4 1002.3 DAY-HOUR 17-12 23- 3 30- 0 29-12 31-15 10-15 5-15 1-15 13-15 2-12 25- 0 5- 3 MEAN QFF PRESSURE IN HPA 1021.9 1023.7 1012.5 1011.7 1008.5 1000.1 999.7 1000.9 1005.6 1013.6 1018.0 1018.0 1011.2 MAX. QFF PRESSURE IN HPA 1032.9 1034.1 1020.4 1020.7 1018.2 1007.4 1006.6 1008.5 1022.5 1024.6 1024.9 1027.3 1034.1 DAY-HOUR 30- 6 4- 6 1- 3 2- 3 1- 6 2- 6 20- 6 19- 6 23- 3 24- 6 22- 6 18-15 MIN. QFF PRESSURE IN HPA 1010.4 1009.1 1000.7 1003.6 995.3 993.5 992.4 992.2 996.6 1003.7 1011.5 1008.2 992.2 DAY-HOUR 2-21 23- 9 27-12 29- 3 31-18 30-18 1-15 1-15 12-12 1-18 24-21 5- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 843.8 845.6 841.7 845.3 844.7 841.3 842.2 842.6 844.1 848.0 847.6 844.8 844.3 MAX. QFE PRESSURE IN HPA 850.8 851.8 847.6 848.8 847.9 843.9 846.4 846.1 852.8 853.4 851.5 849.5 853.4 DAY 22 4 8 11 22 15 20 20 24 27 8 19 MIN. QFE PRESSURE IN HPA 837.6 837.0 831.4 842.1 841.4 837.1 837.3 837.2 838.3 841.5 842.1 837.6 831.4 DAY 12 23 30 29 31 11 7 2 13 2 25 5 MEAN QNH PRESSURE IN HPA 1016.7 1018.8 1014.3 1018.5 1017.8 1013.8 1014.8 1015.3 1017.0 1021.6 1021.2 1017.9 1017.3 MAX. QNH PRESSURE IN HPA 1024.9 1026.0 1021.2 1022.5 1021.5 1016.8 1019.8 1019.4 1027.2 1027.9 1025.7 1023.4 1027.9 DAY 22 4 8 11 22 15 20 20 24 27 8 19 MIN. QNH PRESSURE IN HPA 1009.5 1008.8 1002.3 1014.8 1013.9 1008.9 1009.2 1009.1 1010.3 1014.1 1014.8 1009.5 1002.3 DAY 12 23 30 29 31 11 7 2 13 2 25 5 MEAN QFF PRESSURE IN HPA 1021.1 1022.9 1011.9 1011.2 1008.5 999.9 999.5 1000.7 1005.1 1012.8 1017.5 1017.4 1010.7 MAX. QFF PRESSURE IN HPA 1030.8 1032.5 1018.7 1018.2 1015.7 1003.9 1004.6 1006.4 1020.3 1022.4 1022.5 1024.1 1032.5 DAY 31 4 1 2 1 7 20 20 24 25 23 19 MIN. QFF PRESSURE IN HPA 1011.4 1009.5 1000.8 1003.9 1000.9 994.6 993.6 994.6 997.0 1004.6 1011.8 1008.2 993.6 DAY 12 23 16 29 31 30 7 2 12 2 25 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 843.9 845.8 842.3 846.0 845.5 842.1 843.1 843.4 844.6 848.5 847.9 845.0 844.8 MAX. QFE PRESSURE IN HPA 850.6 851.7 847.8 849.4 849.1 844.9 847.8 847.2 853.2 854.0 851.6 848.8 854.0 DAY 22 4 8 9 1 2 20 19 23 27 8 19 MIN. QFE PRESSURE IN HPA 837.0 836.1 831.8 841.4 842.2 837.9 838.5 838.2 838.8 841.8 843.0 837.5 831.8 DAY 17 23 30 29 31 11 7 2 13 2 25 5 MEAN QNH PRESSURE IN HPA 1016.8 1019.1 1014.9 1019.3 1018.7 1014.8 1015.9 1016.3 1017.7 1022.2 1021.5 1018.2 1017.9 MAX. QNH PRESSURE IN HPA 1024.6 1025.9 1021.4 1023.2 1022.9 1018.0 1021.4 1020.7 1027.7 1028.6 1025.8 1022.5 1028.6 DAY 22 4 8 9 1 2 20 19 23 27 8 19 MIN. QNH PRESSURE IN HPA 1008.8 1007.8 1002.8 1013.9 1014.9 1009.9 1010.6 1010.2 1010.9 1014.4 1015.8 1009.4 1002.8 DAY 17 23 30 29 31 11 7 2 13 2 25 5 MEAN QFF PRESSURE IN HPA 1022.5 1024.5 1013.2 1012.6 1009.4 1001.1 1000.7 1002.3 1007.1 1015.0 1019.3 1018.8 1012.2 MAX. QFF PRESSURE IN HPA 1031.3 1033.8 1020.4 1020.7 1017.8 1006.6 1006.4 1007.9 1022.5 1024.5 1024.2 1025.0 1033.8 DAY 27 4 1 2 1 2 20 20 23 25 23 19 MIN. QFF PRESSURE IN HPA 1012.6 1009.8 1002.0 1003.6 1001.6 995.8 994.3 995.7 999.0 1006.1 1013.8 1008.3 994.3 DAY 12 23 28 29 31 30 7 2 12 2 20 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 845.2 846.9 843.2 846.8 846.1 842.8 843.7 844.1 845.5 849.4 848.9 845.9 845.7 MAX. QFE PRESSURE IN HPA 852.5 853.3 848.5 850.4 850.0 845.8 848.1 847.7 853.9 855.6 853.0 850.1 855.6 DAY 22 4 8 11 21 26 20 19 23 27 8 18 MIN. QFE PRESSURE IN HPA 837.4 836.9 832.7 841.3 842.6 838.0 839.1 838.6 839.7 842.4 844.9 838.8 832.7 DAY 17 23 30 29 31 10 6 1 12 2 25 5 MEAN QNH PRESSURE IN HPA 1018.4 1020.4 1016.0 1020.3 1019.4 1015.5 1016.6 1017.1 1018.7 1023.3 1022.6 1019.2 1019.0 MAX. QNH PRESSURE IN HPA 1026.9 1027.8 1022.2 1024.4 1023.9 1019.1 1021.7 1021.3 1028.5 1030.5 1027.4 1024.1 1030.5 DAY 22 4 8 11 21 26 20 19 23 27 8 18 MIN. QNH PRESSURE IN HPA 1009.3 1008.7 1003.8 1013.8 1015.3 1010.0 1011.3 1010.7 1012.0 1015.1 1018.0 1010.9 1003.8 DAY 17 23 30 29 31 10 6 1 12 2 25 5 MEAN QFF PRESSURE IN HPA 1023.0 1024.5 1013.7 1012.9 1009.8 1001.6 1001.3 1002.6 1007.0 1014.7 1019.1 1019.0 1012.4 MAX. QFF PRESSURE IN HPA 1032.9 1034.1 1020.3 1020.6 1018.2 1007.4 1006.6 1008.5 1021.9 1024.6 1024.9 1025.6 1034.1 DAY 30 4 1 2 1 2 20 19 23 24 22 18 MIN. QFF PRESSURE IN HPA 1013.4 1009.8 1003.2 1003.8 1002.0 995.9 995.4 996.1 998.2 1004.6 1014.1 1010.3 995.4 DAY 17 23 27 29 31 30 1 2 12 2 20 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 844.3 846.4 842.6 846.1 845.4 842.1 842.9 843.3 844.7 848.4 847.8 844.9 844.9 MAX. QFE PRESSURE IN HPA 851.3 852.4 847.9 849.8 848.7 844.9 846.8 846.8 853.2 854.1 851.8 850.1 854.1 DAY 22 4 8 9 21 2 20 19 23 27 8 18 MIN. QFE PRESSURE IN HPA 836.5 837.0 833.5 841.1 841.2 837.4 838.8 837.0 839.2 842.1 844.1 838.3 833.5 DAY 17 23 29 29 31 10 6 1 12 2 16 5 MEAN QNH PRESSURE IN HPA 1017.3 1019.8 1015.3 1019.4 1018.5 1014.8 1015.7 1016.1 1017.8 1022.1 1021.4 1018.1 1018.0 MAX. QNH PRESSURE IN HPA 1025.5 1026.7 1021.5 1023.7 1022.4 1018.0 1020.2 1020.2 1027.7 1028.7 1026.0 1024.1 1028.7 DAY 22 4 8 9 21 2 20 19 23 27 8 18 MIN. QNH PRESSURE IN HPA 1008.2 1008.8 1004.8 1013.6 1013.7 1009.3 1010.9 1008.8 1011.4 1014.8 1017.1 1010.3 1004.8 DAY 17 23 29 29 31 10 6 1 12 2 16 5 MEAN QFF PRESSURE IN HPA 1021.5 1023.6 1012.9 1012.0 1008.8 1000.8 1000.1 1001.4 1005.9 1013.4 1017.5 1017.4 1011.3 MAX. QFF PRESSURE IN HPA 1031.3 1032.7 1018.8 1020.2 1017.2 1006.7 1005.4 1007.2 1020.6 1021.6 1023.3 1024.5 1032.7 DAY 30 4 12 2 1 2 20 19 23 24 22 18 MIN. QFF PRESSURE IN HPA 1012.0 1009.1 1001.6 1004.3 1000.3 995.4 995.1 994.6 997.8 1005.2 1012.7 1009.4 994.6 DAY 17 23 27 29 31 30 1 1 12 2 16 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 843.4 845.6 841.5 844.7 844.3 841.0 841.5 841.9 843.4 847.4 847.0 844.3 843.8 MAX. QFE PRESSURE IN HPA 849.8 851.5 847.8 848.4 847.5 843.8 845.0 845.3 851.8 852.8 850.5 849.9 852.8 DAY 22 8 8 8 21 25 20 19 23 27 8 18 MIN. QFE PRESSURE IN HPA 836.1 837.2 832.4 840.7 839.3 836.3 837.4 836.0 838.0 841.4 842.4 839.3 832.4 DAY 17 23 29 29 31 10 5 1 12 2 24 5 MEAN QNH PRESSURE IN HPA 1016.3 1018.8 1014.0 1017.8 1017.3 1013.4 1014.1 1014.5 1016.3 1020.9 1020.5 1017.3 1016.8 MAX. QNH PRESSURE IN HPA 1023.7 1025.7 1021.4 1022.1 1021.0 1016.7 1018.1 1018.5 1026.0 1027.2 1024.5 1023.8 1027.2 DAY 22 8 8 8 21 25 20 19 23 27 8 18 MIN. QNH PRESSURE IN HPA 1007.8 1009.1 1003.5 1013.1 1011.5 1008.0 1009.3 1007.7 1010.0 1013.9 1015.1 1011.5 1003.5 DAY 17 23 29 29 31 10 5 1 12 2 24 5 MEAN QFF PRESSURE IN HPA 1020.7 1022.7 1011.6 1010.4 1007.8 999.5 998.8 999.7 1004.2 1012.1 1016.8 1016.9 1010.1 MAX. QFF PRESSURE IN HPA 1029.8 1031.6 1018.8 1017.9 1015.7 1004.8 1003.3 1005.2 1018.6 1020.4 1022.4 1024.8 1031.6 DAY 30 4 8 2 1 2 20 20 23 25 22 18 MIN. QFF PRESSURE IN HPA 1011.8 1009.3 1000.7 1005.2 997.8 994.5 993.1 992.9 996.6 1004.0 1011.9 1010.0 992.9 DAY 17 23 27 29 31 30 14 2 12 2 16 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 844.1 846.1 841.6 844.8 843.9 840.3 841.2 841.5 843.2 847.7 847.5 845.1 843.9 MAX. QFE PRESSURE IN HPA 849.9 851.8 847.1 848.6 847.0 843.4 844.7 845.2 852.1 852.7 851.0 850.6 852.7 DAY 27 8 8 8 21 3 20 19 23 27 8 18 MIN. QFE PRESSURE IN HPA 837.2 838.9 831.6 840.7 837.9 835.5 837.0 835.3 837.8 841.8 842.9 841.3 831.6 DAY 17 23 29 29 31 10 5 1 13 1 24 5 MEAN QNH PRESSURE IN HPA 1017.1 1019.5 1014.2 1017.9 1016.9 1012.7 1013.7 1014.1 1016.0 1021.2 1021.0 1018.2 1016.9 MAX. QNH PRESSURE IN HPA 1023.8 1026.0 1020.6 1022.3 1020.5 1016.3 1017.8 1018.4 1026.4 1027.1 1025.1 1024.6 1027.1 DAY 27 8 8 8 21 3 20 19 23 27 8 18 MIN. QNH PRESSURE IN HPA 1009.1 1011.0 1002.5 1013.1 1009.9 1007.1 1008.8 1006.8 1009.7 1014.4 1015.7 1013.8 1002.5 DAY 17 23 29 29 31 10 5 1 13 1 24 5 MEAN QFF PRESSURE IN HPA 1022.8 1024.7 1012.3 1011.1 1007.5 998.9 998.5 999.9 1005.3 1014.0 1018.7 1018.9 1011.1 MAX. QFF PRESSURE IN HPA 1031.5 1033.6 1018.5 1018.1 1015.5 1003.8 1003.1 1005.9 1020.2 1022.8 1024.6 1027.3 1033.6 DAY 27 3 12 2 1 2 21 19 23 24 22 18 MIN. QFF PRESSURE IN HPA 1014.2 1012.9 1001.6 1004.4 996.7 993.8 992.4 992.2 998.0 1005.1 1014.3 1012.8 992.2 DAY 2 22 29 29 31 30 1 1 12 1 15 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 844.6 846.6 842.3 845.9 844.8 841.1 842.0 842.5 844.0 848.4 847.9 845.4 844.6 MAX. QFE PRESSURE IN HPA 851.7 852.1 847.9 849.7 848.3 844.2 845.7 846.4 852.8 853.0 851.8 851.3 853.0 DAY 21 8 8 8 21 3 19 19 23 26 8 18 MIN. QFE PRESSURE IN HPA 838.2 838.8 832.4 842.1 837.9 836.5 837.6 835.8 838.8 841.9 843.0 840.7 832.4 DAY 17 22 29 29 31 10 6 1 12 1 24 4 MEAN QNH PRESSURE IN HPA 1017.7 1019.9 1015.0 1019.2 1017.9 1013.5 1014.7 1015.2 1016.9 1022.0 1021.5 1018.6 1017.7 MAX. QNH PRESSURE IN HPA 1025.9 1026.4 1021.5 1023.6 1022.0 1017.2 1018.9 1019.8 1027.2 1027.4 1026.0 1025.5 1027.4 DAY 21 8 8 8 21 3 19 19 23 26 8 18 MIN. QNH PRESSURE IN HPA 1010.2 1010.9 1003.5 1014.8 1009.9 1008.2 1009.5 1007.4 1010.9 1014.5 1015.8 1013.1 1003.5 DAY 17 22 29 29 31 10 6 1 12 1 24 4 MEAN QFF PRESSURE IN HPA 1022.4 1023.9 1012.5 1011.7 1008.2 999.6 999.4 1000.6 1005.4 1013.5 1017.9 1018.4 1011.1 MAX. QFF PRESSURE IN HPA 1031.7 1033.3 1019.2 1017.7 1016.6 1004.8 1004.6 1007.3 1020.5 1023.3 1023.6 1026.7 1033.3 DAY 29 3 12 1 1 2 22 19 23 24 22 18 MIN. QFF PRESSURE IN HPA 1012.9 1011.4 1001.0 1005.9 995.3 993.5 993.7 993.1 996.8 1003.7 1012.2 1012.2 993.1 DAY 2 22 29 29 31 30 6 1 12 1 24 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 844.2 846.2 842.1 845.9 844.7 841.1 842.0 842.6 844.0 848.3 847.8 845.1 844.5 MAX. QFE PRESSURE IN HPA 851.5 852.2 848.1 849.2 849.0 844.1 845.9 846.3 852.8 853.4 851.7 850.2 853.4 DAY 21 3 7 8 20 3 19 19 23 26 8 18 MIN. QFE PRESSURE IN HPA 838.1 837.9 832.2 842.2 838.2 836.8 837.7 836.6 838.1 841.9 842.6 838.8 832.2 DAY 2 22 29 29 31 10 5 1 13 1 24 4 MEAN QNH PRESSURE IN HPA 1017.2 1019.6 1014.8 1019.1 1017.8 1013.6 1014.6 1015.3 1017.0 1021.9 1021.4 1018.2 1017.5 MAX. QNH PRESSURE IN HPA 1025.7 1026.5 1021.7 1023.0 1022.8 1017.1 1019.2 1019.6 1027.2 1027.9 1025.9 1024.2 1027.9 DAY 21 3 7 8 20 3 19 19 23 26 8 18 MIN. QNH PRESSURE IN HPA 1010.1 1009.9 1003.2 1014.9 1010.2 1008.6 1009.6 1008.4 1010.1 1014.5 1015.3 1010.9 1003.2 DAY 2 22 29 29 31 10 5 1 13 1 24 4 MEAN QFF PRESSURE IN HPA 1021.5 1023.1 1012.3 1011.6 1007.9 999.6 999.2 1000.6 1005.3 1013.2 1017.5 1017.6 1010.8 MAX. QFF PRESSURE IN HPA 1031.2 1032.3 1019.2 1018.0 1016.5 1004.8 1004.3 1007.1 1020.7 1022.8 1023.3 1024.5 1032.3 DAY 29 3 12 1 1 3 21 19 22 24 22 18 MIN. QFF PRESSURE IN HPA 1010.4 1009.5 1001.1 1005.3 996.2 993.9 993.7 993.8 996.9 1004.8 1011.5 1009.8 993.7 DAY 2 22 27 28 31 30 1 1 13 1 24 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.3 2.1 7.9 13.7 21.7 27.0 28.1 28.3 25.6 16.0 11.2 4.0 15.4 MINIMUN AIR TEMPERATURE (C) -3.1 -1.3 3.5 8.4 15.8 21.1 23.1 23.2 20.8 11.2 6.8 0.6 10.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 19 23 27 13 0 0 0 84 DAYS WITH MINIMUM TEMP. <=-4 12 4 1 0 0 0 0 0 0 0 0 6 23 DAYS WITH FREEZING MIN.<= 0 25 21 6 0 0 0 0 0 0 0 0 11 63 TEMPERATURE RECORDS LOWEST(C) -11.3 -5.8 -4.6 2.4 8.5 16.8 19.4 20.1 18.5 5.0 1.5 -9.2 -11.3 DAY 12 13 21 5 14 7 13 30 3 30 14 28 MAXIMUM AIR TEMPERATURE (C) 3.5 5.9 12.6 18.9 26.9 32.5 33.2 33.7 31.2 21.5 16.9 8.6 20.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 8 27 27 30 23 0 0 0 115 DAYS WITH MAXIMUM TEMP. <= 0 2 0 0 0 0 0 0 0 0 0 0 0 2 TEMPERATURE RECORDS HIGHEST(C) 8.0 13.1 18.4 27.0 32.4 36.0 37.4 36.6 34.2 27.0 22.0 17.0 37.4 DAY 5 28 5 27 25 29 28 5 14 1 5 4 DIF. BETWEEN (MAX.-MIN.) (C) 6.6 7.2 9.1 10.5 11.1 11.4 10.1 10.5 10.4 10.3 10.1 8.0 9.7 MEAN DAILY TEMP. (MDT) (C) 0.2 2.3 8.0 13.7 21.4 26.8 28.2 28.5 26.0 16.3 11.9 4.6 15.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.9 43.4 174.1 216.9 231.2 149.9 2.0 0.0 0.0 819.6 HEATING DEG. DAYS(BASE 18 0C) 551.6 439.4 309.5 144.1 6.6 0.0 0.0 0.0 0.0 69.3 184.1 415.8 2120.3 DEWPOINT (MEAN C) -5.3 -3.5 -2.3 -1.5 2.6 3.0 8.6 9.8 3.0 2.9 0.4 -3.5 1.2 MIXING RATIO (G/KG) 3.19 3.61 3.94 4.26 5.69 5.79 8.47 9.17 5.87 5.77 4.77 3.66 5.35 VAPOUR PRESSURE (HPA) 4.31 4.86 5.32 5.73 7.64 7.75 11.30 12.24 7.89 7.79 6.45 4.95 7.18 SATURATION DEF. (HPA) 1.84 2.42 5.85 10.82 19.12 28.81 27.47 26.96 25.62 11.07 7.45 3.73 14.26 RELATIVE HUMIDITY (MEAN %) 71 70 52 39 31 23 31 33 25 44 49 62 44 RELATIVE HUMIDITY (MAX. %) 86 86 72 59 47 33 43 42 35 59 63 76 58 RELATIVE HUMIDITY (MIN. %) 54 51 34 24 20 14 22 25 17 30 34 45 31 RELATIVE HUMIDITY (MEAN% 03UTC) 75 81 61 50 44 32 41 40 30 55 58 68 53 RELATIVE HUMIDITY (MEAN% 09UTC) 62 59 41 29 23 17 24 28 19 34 35 48 35 RELATIVE HUMIDITY (MEAN% 15UTC) 72 69 46 31 27 18 25 29 27 43 53 62 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 67.8 69.9 46.8 31.0 6.5 0.0 0.2 0.0 0.0 15.8 13.0 47.0 298.0 DAYS WITH PRECIPITATION >=10 3 1 1 1 0 0 0 0 0 0 1 2 9 DAYS WITH PRECIPITATION >= 5 4 5 4 3 0 0 0 0 0 1 1 2 20 DAYS WITH PRECIPITATION >= 1 14 9 7 7 2 0 0 0 0 4 3 5 51 DAYS WITH PRECIPITATION 17 16 14 12 3 0 5 0 0 10 3 7 87 GREATEST DAILY PRECIPITATION 14.5 28.0 16.0 10.6 4.1 0.0 0.2 0.0 0.0 6.2 10.0 25.0 28.0 DAY 9 10 17 2 13 ** 5 ** ** 28 12 25 DAY WITH THUNDER STORM 1 2 1 3 2 0 1 0 0 1 0 0 11 DAYS WITH SNOW OR SLEET 16 12 4 0 0 0 0 0 0 0 0 5 37 DAYS WITH DUST 0 0 0 0 1 1 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 180 360 360 270 225 225 180 180 180 225 270 225 180 PREVAILING WIND SPEED(KNOTS) 4.2 4.2 5.0 8.7 7.0 5.3 4.9 4.6 4.7 6.7 4.0 6.0 5.5 PREVAILING WIND PERCENT 3.6 8.5 8.5 10.0 10.9 10.0 6.5 10.5 8.8 7.3 2.1 2.4 6.2 CALMS PERCENT OF WIND 83.5 77.2 60.9 50.8 58.5 59.2 74.5 66.1 69.6 75.0 91.7 95.2 71.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 247 248 240 248 240 248 2919 VECTOR WIND DIRECTION (MEAN) 150 170 247 234 224 224 210 207 223 253 274 263 226 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.2 0.4 1.3 1.2 0.7 0.5 0.4 0.3 0.4 0.2 0.2 0.5 WIND STEADINESES (MEAN %) 28.6 16.7 17.4 43.3 48.0 31.8 41.7 26.7 21.4 26.7 50.0 50.0 33.3 WIND SPEED (MEAN KNOTS) 0.7 1.2 2.3 3.0 2.5 2.2 1.2 1.5 1.4 1.5 0.4 0.4 1.5 FASTEST WIND DIRECTION 280 210 240 260 240 300 320 180 210 360 240 290 260 FASTEST WIND SPEED (KNOTS) 12 17 19 47 29 16 12 10 10 17 14 16 47 DAY 1 24 14 13 12 12 7 23 10 8 13 18 DAYS WITH SKY CLEAR (0-2)/8 8 8 15 16 24 26 20 30 30 20 23 15 235 DAYS WITH P.CLOUDY (3-6)/8 7 9 9 9 5 4 11 1 0 10 5 11 81 DAYS WITH CLOUDY (7-8)/8 16 11 7 5 2 0 0 0 0 1 2 5 49 DAYS WITH VISIBILITY =< 2 KM 11 14 4 0 0 0 0 0 0 2 0 8 39 DURATION OF SUNSHINE HOURS 99.4 120.0 214.6 264.4 328.6 349.7 309.4 344.8 314.7 264.3 217.8 144.0 2971.7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 845.1 842.3 845.9 842.2 843.1 841.2 841.4 842.2 844.3 848.0 848.8 846.6 844.3 MAX. QFE PRESSURE IN HPA 853.0 851.9 855.4 849.2 849.6 848.3 847.3 846.9 848.9 856.5 856.8 854.3 856.8 DAY-HOUR 26-18 8- 6 10- 6 24- 6 16- 6 1- 6 17- 6 3- 6 24- 6 19- 6 22- 6 28- 6 MIN. QFE PRESSURE IN HPA 838.2 831.5 839.2 833.1 833.2 835.5 835.7 837.0 839.5 841.1 840.0 837.1 831.5 DAY-HOUR 23- 3 16- 0 14-15 15-15 13- 0 26-15 4-15 8-15 1-15 31-21 1- 0 25- 3 MEAN QNH PRESSURE IN HPA 1018.3 1015.0 1019.2 1014.9 1016.0 1013.6 1013.9 1014.9 1017.3 1021.6 1022.5 1020.0 1017.3 MAX. QNH PRESSURE IN HPA 1027.4 1026.2 1030.2 1023.0 1023.5 1022.0 1020.8 1020.3 1022.7 1031.5 1031.8 1028.9 1031.8 DAY-HOUR 26-18 8- 6 10- 6 24- 6 16- 6 1- 6 17- 6 3- 6 24- 6 19- 6 22- 6 28- 6 MIN. QNH PRESSURE IN HPA 1010.2 1002.4 1011.4 1004.3 1004.4 1007.1 1007.3 1008.8 1011.7 1013.6 1012.3 1008.9 1002.4 DAY-HOUR 23- 3 16- 0 14-15 15-15 13- 0 26-15 4-15 8-15 1-15 31-21 1- 0 25- 3 MEAN QFF PRESSURE IN HPA 1021.8 1016.7 1017.2 1008.9 1005.1 999.6 998.9 999.8 1004.1 1014.2 1018.3 1020.5 1010.4 MAX. QFF PRESSURE IN HPA 1033.5 1029.6 1029.9 1017.3 1015.0 1010.8 1005.3 1006.2 1010.3 1027.9 1030.2 1036.9 1036.9 DAY-HOUR 12- 3 8- 6 21- 3 3-15 15- 6 1- 6 17- 6 29- 6 28- 6 19- 3 14-15 28- 6 MIN. QFF PRESSURE IN HPA 1010.2 1003.4 1006.6 997.3 993.5 991.1 993.1 992.9 997.9 1002.7 1006.1 1011.5 991.1 DAY-HOUR 23- 3 16- 0 14-15 15-15 12- 9 27-12 4-15 8-15 1-21 1-12 1- 0 25- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 844.7 841.9 845.6 841.9 842.8 841.1 841.2 842.0 844.1 847.9 848.5 846.4 844.0 MAX. QFE PRESSURE IN HPA 851.5 850.5 853.4 847.8 848.2 846.9 845.3 845.3 847.4 855.1 855.7 852.4 855.7 DAY 20 8 10 25 16 1 17 3 24 16 23 28 MIN. QFE PRESSURE IN HPA 839.0 831.5 839.9 834.7 833.2 835.8 836.9 838.9 840.6 842.8 840.0 838.1 831.5 DAY 18 16 25 16 13 27 4 8 2 1 1 25 MEAN QNH PRESSURE IN HPA 1017.8 1014.5 1018.8 1014.6 1015.6 1013.6 1013.7 1014.7 1017.0 1021.5 1022.2 1019.7 1017.0 MAX. QNH PRESSURE IN HPA 1025.7 1024.5 1027.9 1021.4 1021.8 1020.3 1018.5 1018.5 1020.9 1029.9 1030.6 1026.7 1030.6 DAY 20 8 10 25 16 1 17 3 24 16 23 28 MIN. QNH PRESSURE IN HPA 1011.1 1002.4 1012.2 1006.1 1004.4 1007.4 1008.7 1011.0 1013.0 1015.6 1012.3 1010.1 1002.4 DAY 18 16 25 16 13 27 4 8 2 1 1 25 MEAN QFF PRESSURE IN HPA 1020.9 1016.1 1016.5 1008.6 1004.7 999.6 998.5 999.3 1003.3 1013.6 1017.4 1019.9 1009.9 MAX. QFF PRESSURE IN HPA 1030.4 1028.3 1028.0 1013.8 1012.5 1009.6 1003.2 1004.3 1007.5 1025.2 1027.1 1035.0 1035.0 DAY 27 8 21 24 16 1 9 3 28 19 23 28 MIN. QFF PRESSURE IN HPA 1011.6 1003.4 1006.9 999.4 995.2 991.9 993.6 994.6 999.1 1003.1 1006.1 1012.3 991.9 DAY 23 16 25 16 13 27 3 8 11 1 1 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 844.8 842.2 846.1 842.5 843.6 842.1 842.1 842.9 844.8 848.3 848.7 846.6 844.6 MAX. QFE PRESSURE IN HPA 851.5 850.5 854.5 848.5 849.2 848.0 846.8 846.2 848.1 855.7 855.8 852.6 855.8 DAY 20 8 10 25 16 1 17 3 24 19 23 28 MIN. QFE PRESSURE IN HPA 838.2 831.9 840.1 835.3 834.3 836.2 837.5 839.6 841.8 842.9 840.5 837.1 831.9 DAY 23 16 25 16 13 27 4 8 5 14 1 25 MEAN QNH PRESSURE IN HPA 1017.9 1014.9 1019.4 1015.2 1016.5 1014.8 1014.8 1015.7 1017.9 1022.0 1022.4 1020.0 1017.6 MAX. QNH PRESSURE IN HPA 1025.7 1024.5 1029.2 1022.2 1023.0 1021.6 1020.2 1019.5 1021.7 1030.6 1030.7 1027.0 1030.7 DAY 20 8 10 25 16 1 17 3 24 19 23 28 MIN. QNH PRESSURE IN HPA 1010.2 1002.9 1012.4 1006.8 1005.7 1007.9 1009.4 1011.8 1014.4 1015.7 1012.9 1008.9 1002.9 DAY 23 16 25 16 13 27 4 8 5 14 1 25 MEAN QFF PRESSURE IN HPA 1021.9 1017.2 1017.9 1009.9 1005.9 1000.7 999.9 1000.9 1005.5 1015.7 1019.5 1021.4 1011.4 MAX. QFF PRESSURE IN HPA 1033.5 1028.8 1029.9 1016.4 1014.4 1010.3 1004.7 1005.5 1010.2 1027.9 1029.4 1036.2 1036.2 DAY 12 8 21 8 15 1 17 30 24 19 23 28 MIN. QFF PRESSURE IN HPA 1010.2 1003.6 1008.3 1001.2 997.1 992.6 994.5 996.0 1001.3 1005.5 1007.8 1011.5 992.6 DAY 23 16 25 16 12 27 28 8 5 1 1 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 846.1 843.3 847.1 843.2 844.3 842.6 842.6 843.7 845.6 849.2 849.7 847.5 845.4 MAX. QFE PRESSURE IN HPA 852.5 851.9 855.4 849.2 849.6 848.3 847.3 846.9 848.9 856.5 856.8 854.3 856.8 DAY 26 8 10 24 16 1 17 3 24 19 22 28 MIN. QFE PRESSURE IN HPA 840.9 833.5 841.5 835.8 834.5 836.6 838.2 840.4 842.5 843.7 842.1 838.1 833.5 DAY 23 16 25 16 13 27 5 8 5 14 1 25 MEAN QNH PRESSURE IN HPA 1019.4 1016.1 1020.5 1016.1 1017.3 1015.3 1015.4 1016.6 1018.9 1023.1 1023.6 1021.0 1018.6 MAX. QNH PRESSURE IN HPA 1026.9 1026.2 1030.2 1023.0 1023.5 1022.0 1020.8 1020.3 1022.7 1031.5 1031.8 1028.9 1031.8 DAY 26 8 10 24 16 1 17 3 24 19 22 28 MIN. QNH PRESSURE IN HPA 1013.4 1004.8 1014.1 1007.4 1005.9 1008.4 1010.2 1012.8 1015.2 1016.6 1014.8 1010.1 1004.8 DAY 23 16 25 16 13 27 5 8 5 14 1 25 MEAN QFF PRESSURE IN HPA 1022.9 1017.9 1018.4 1010.1 1006.3 1001.4 1000.6 1001.5 1005.6 1015.5 1019.1 1021.4 1011.7 MAX. QFF PRESSURE IN HPA 1033.0 1029.6 1029.9 1016.7 1015.0 1010.8 1005.3 1006.2 1010.3 1027.6 1028.9 1036.9 1036.9 DAY 12 8 21 8 15 1 17 29 28 19 14 28 MIN. QFF PRESSURE IN HPA 1015.3 1006.3 1009.8 1000.5 995.8 992.4 995.4 996.8 1001.7 1005.7 1008.5 1013.4 992.4 DAY 23 16 25 16 12 27 28 20 5 1 1 25 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 845.3 842.7 846.3 842.5 843.7 841.9 841.8 842.9 844.9 848.2 848.9 846.7 844.7 MAX. QFE PRESSURE IN HPA 852.0 851.2 854.6 848.4 849.1 847.0 846.3 846.0 848.2 855.1 856.0 853.4 856.0 DAY 26 8 10 25 16 1 17 2 16 19 22 28 MIN. QFE PRESSURE IN HPA 839.5 835.1 841.9 835.0 833.9 836.3 837.4 839.7 841.6 842.1 841.6 837.5 833.9 DAY 23 16 14 16 13 27 4 8 5 14 1 25 MEAN QNH PRESSURE IN HPA 1018.5 1015.4 1019.7 1015.2 1016.6 1014.5 1014.4 1015.7 1018.0 1021.9 1022.7 1020.1 1017.7 MAX. QNH PRESSURE IN HPA 1026.3 1025.3 1029.3 1022.1 1022.9 1020.5 1019.6 1019.3 1021.8 1029.9 1030.9 1027.9 1030.9 DAY 26 8 10 25 16 1 17 2 16 19 22 28 MIN. QNH PRESSURE IN HPA 1011.7 1006.6 1014.5 1006.5 1005.2 1008.0 1009.3 1012.0 1014.2 1014.8 1014.2 1009.4 1005.2 DAY 23 16 14 16 13 27 4 8 5 14 1 25 MEAN QFF PRESSURE IN HPA 1021.7 1016.9 1017.4 1009.1 1005.4 1000.4 999.4 1000.5 1004.5 1013.9 1017.8 1020.1 1010.6 MAX. QFF PRESSURE IN HPA 1031.6 1028.8 1028.9 1016.5 1014.6 1009.0 1004.3 1005.2 1009.0 1025.5 1028.9 1034.3 1034.3 DAY 12 8 17 8 15 1 9 2 24 19 14 28 MIN. QFF PRESSURE IN HPA 1012.7 1006.4 1009.8 999.0 993.5 991.7 994.6 995.9 1000.5 1004.1 1007.3 1012.5 991.7 DAY 23 16 14 16 12 27 28 20 5 1 1 25 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 844.4 841.7 845.1 841.3 842.4 840.5 840.6 841.5 843.5 847.2 848.1 845.8 843.5 MAX. QFE PRESSURE IN HPA 851.8 849.8 852.0 846.8 847.7 844.9 844.6 844.6 846.9 853.9 855.6 852.5 855.6 DAY 26 8 10 24 16 1 15 2 27 19 22 28 MIN. QFE PRESSURE IN HPA 838.6 834.4 839.9 834.3 834.3 835.5 836.3 838.2 840.5 841.7 841.0 837.1 834.3 DAY 17 15 14 15 13 27 4 8 1 14 1 25 MEAN QNH PRESSURE IN HPA 1017.5 1014.3 1018.3 1013.8 1015.1 1012.9 1013.0 1014.1 1016.4 1020.7 1021.7 1019.0 1016.4 MAX. QNH PRESSURE IN HPA 1026.0 1023.7 1026.3 1020.2 1021.3 1018.0 1017.7 1017.7 1020.3 1028.5 1030.5 1026.9 1030.5 DAY 26 8 10 24 16 1 15 2 27 19 22 28 MIN. QNH PRESSURE IN HPA 1010.7 1005.8 1012.2 1005.7 1005.7 1007.1 1008.0 1010.2 1012.9 1014.3 1013.5 1008.9 1005.7 DAY 17 15 14 15 13 27 4 8 1 14 1 25 MEAN QFF PRESSURE IN HPA 1020.6 1015.7 1015.9 1007.8 1004.2 998.9 997.8 998.6 1002.7 1012.9 1016.9 1019.3 1009.3 MAX. QFF PRESSURE IN HPA 1031.5 1027.6 1027.5 1014.4 1013.1 1006.7 1002.3 1003.4 1007.1 1023.9 1027.6 1033.7 1033.7 DAY 12 8 17 8 15 1 17 2 27 19 14 28 MIN. QFF PRESSURE IN HPA 1012.3 1006.1 1006.8 998.1 994.9 991.1 993.3 994.1 998.1 1002.7 1007.1 1011.8 991.1 DAY 23 15 24 15 12 27 2 8 1 1 1 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 845.0 842.0 845.3 841.4 842.3 839.8 840.2 841.0 843.4 847.4 848.5 846.3 843.6 MAX. QFE PRESSURE IN HPA 852.1 849.8 851.9 847.0 847.5 843.9 844.0 844.2 847.0 854.3 856.5 853.1 856.5 DAY 26 7 10 24 15 1 15 3 27 18 22 28 MIN. QFE PRESSURE IN HPA 838.6 832.6 839.2 833.1 836.1 835.5 835.7 837.0 839.5 842.1 841.6 838.0 832.6 DAY 17 15 14 15 13 26 4 8 1 1 1 25 MEAN QNH PRESSURE IN HPA 1018.2 1014.7 1018.5 1013.9 1015.0 1012.1 1012.6 1013.5 1016.2 1020.9 1022.3 1019.6 1016.4 MAX. QNH PRESSURE IN HPA 1026.4 1023.7 1026.2 1020.5 1021.0 1016.8 1017.0 1017.2 1020.5 1028.9 1031.5 1027.6 1031.5 DAY 26 7 10 24 15 1 15 3 27 18 22 28 MIN. QNH PRESSURE IN HPA 1010.7 1003.7 1011.4 1004.3 1007.8 1007.1 1007.3 1008.8 1011.7 1014.8 1014.2 1010.0 1003.7 DAY 17 15 14 15 13 26 4 8 1 1 1 25 MEAN QFF PRESSURE IN HPA 1022.2 1016.9 1017.0 1008.4 1004.3 998.0 997.8 998.6 1003.8 1014.6 1019.3 1021.1 1010.2 MAX. QFF PRESSURE IN HPA 1033.2 1028.1 1027.7 1017.3 1012.8 1005.1 1001.8 1003.1 1009.0 1026.1 1030.2 1036.3 1036.3 DAY 12 7 17 3 15 1 17 30 27 18 14 28 MIN. QFF PRESSURE IN HPA 1014.0 1003.5 1006.6 997.3 998.2 991.6 993.1 992.9 998.0 1004.1 1009.2 1012.2 991.6 DAY 1 15 14 15 25 26 4 8 1 1 1 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 845.6 842.5 846.2 842.5 843.1 840.6 841.2 842.0 844.1 848.0 849.0 846.9 844.3 MAX. QFE PRESSURE IN HPA 853.0 850.6 852.9 848.2 848.0 845.5 845.0 845.6 848.1 855.3 856.5 853.2 856.5 DAY 26 7 9 24 15 4 16 2 27 18 22 28 MIN. QFE PRESSURE IN HPA 838.8 833.9 840.1 834.7 835.7 835.9 836.2 838.0 840.6 842.2 842.5 838.7 833.9 DAY 17 15 24 15 12 26 4 8 1 31 1 25 MEAN QNH PRESSURE IN HPA 1018.8 1015.2 1019.5 1015.3 1015.9 1013.0 1013.7 1014.6 1017.1 1021.6 1022.8 1020.3 1017.3 MAX. QNH PRESSURE IN HPA 1027.4 1024.6 1027.3 1021.8 1021.6 1018.7 1018.1 1018.8 1021.7 1030.1 1031.5 1027.7 1031.5 DAY 26 7 9 24 15 4 16 2 27 18 22 28 MIN. QNH PRESSURE IN HPA 1010.9 1005.2 1012.4 1006.1 1007.3 1007.5 1007.9 1010.0 1013.0 1014.9 1015.2 1010.8 1005.2 DAY 17 15 24 15 12 26 4 8 1 31 1 25 MEAN QFF PRESSURE IN HPA 1022.3 1016.9 1017.3 1009.1 1004.9 999.0 998.8 999.5 1003.8 1014.1 1018.3 1020.8 1010.4 MAX. QFF PRESSURE IN HPA 1032.2 1028.1 1028.8 1016.6 1013.1 1006.1 1003.5 1005.1 1009.5 1026.3 1028.8 1034.5 1034.5 DAY 26 7 20 3 15 1 17 2 27 18 14 28 MIN. QFF PRESSURE IN HPA 1013.6 1005.2 1007.2 997.9 995.7 991.7 993.5 994.4 998.3 1003.4 1008.7 1011.5 991.7 DAY 4 19 24 15 12 27 4 8 1 1 1 18 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 845.2 842.2 846.1 842.3 843.1 840.7 841.2 842.0 844.1 848.0 849.0 846.7 844.2 MAX. QFE PRESSURE IN HPA 852.0 850.5 853.4 847.8 848.0 845.2 844.7 845.3 847.9 855.7 856.2 852.5 856.2 DAY 19 7 9 24 15 4 16 2 27 15 22 28 MIN. QFE PRESSURE IN HPA 838.6 832.3 839.9 834.7 836.4 835.6 836.6 838.2 840.0 841.1 842.5 839.5 832.3 DAY 17 15 24 15 12 26 3 8 1 31 1 25 MEAN QNH PRESSURE IN HPA 1018.3 1014.9 1019.4 1015.0 1015.9 1013.1 1013.7 1014.6 1017.1 1021.6 1022.8 1020.1 1017.2 MAX. QNH PRESSURE IN HPA 1026.3 1024.5 1027.9 1021.4 1021.6 1018.4 1017.8 1018.5 1021.5 1030.6 1031.2 1026.9 1031.2 DAY 19 7 9 24 15 4 16 2 27 15 22 28 MIN. QNH PRESSURE IN HPA 1010.7 1003.4 1012.2 1006.1 1008.1 1007.2 1008.4 1010.2 1012.3 1013.6 1015.2 1011.7 1003.4 DAY 17 15 24 15 12 26 3 8 1 31 1 25 MEAN QFF PRESSURE IN HPA 1021.6 1016.3 1017.0 1008.7 1004.7 998.9 998.6 999.5 1003.6 1013.8 1018.0 1020.3 1010.1 MAX. QFF PRESSURE IN HPA 1030.2 1027.7 1029.2 1015.2 1012.3 1005.8 1003.2 1004.4 1009.0 1025.6 1027.7 1033.3 1033.3 DAY 26 7 20 23 15 1 8 2 27 18 14 27 MIN. QFF PRESSURE IN HPA 1012.1 1004.4 1007.3 997.7 996.7 991.7 993.4 994.1 997.9 1003.9 1008.4 1011.7 991.7 DAY 1 15 24 15 11 26 3 7 1 1 1 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.5 1.5 6.9 15.2 18.3 24.6 28.1 27.4 22.9 16.2 9.8 2.8 14.6 MINIMUN AIR TEMPERATURE (C) -1.7 -2.2 3.5 10.0 12.7 18.8 22.7 21.9 17.5 12.0 5.8 -0.1 10.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 6 27 24 5 0 0 0 62 DAYS WITH MINIMUM TEMP. <=-4 4 10 1 0 0 0 0 0 0 0 0 5 20 DAYS WITH FREEZING MIN.<= 0 25 19 4 0 0 0 0 0 0 0 0 16 64 TEMPERATURE RECORDS LOWEST(C) -5.8 -10.5 -4.2 4.0 5.4 15.6 18.0 18.0 9.6 9.6 1.8 -4.8 -10.5 DAY 28 13 11 6 7 13 15 27 27 18 27 20 MAXIMUM AIR TEMPERATURE (C) 5.2 5.8 11.0 20.3 23.6 30.2 33.5 33.1 28.7 21.3 14.8 7.0 19.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 16 29 29 15 0 0 0 89 DAYS WITH MAXIMUM TEMP. <= 0 0 3 0 0 0 0 0 0 0 0 0 1 4 TEMPERATURE RECORDS HIGHEST(C) 9.2 13.0 19.0 27.0 29.5 35.0 36.3 37.5 34.4 24.4 22.0 13.0 37.5 DAY 31 27 30 22 29 29 30 6 8 27 3 10 DIF. BETWEEN (MAX.-MIN.) (C) 6.9 8.0 7.5 10.3 10.9 11.4 10.8 11.2 11.2 9.3 9.0 7.1 9.4 MEAN DAILY TEMP. (MDT) (C) 1.8 1.8 7.3 15.2 18.2 24.5 28.1 27.5 23.1 16.7 10.3 3.4 14.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 5.5 104.7 218.9 197.2 91.0 0.0 0.0 0.0 617.4 HEATING DEG. DAYS(BASE 18 0C) 503.1 453.9 332.7 97.1 34.3 0.0 0.0 0.0 11.3 44.7 231.8 435.3 2144.3 DEWPOINT (MEAN C) -2.8 -5.2 0.9 1.5 2.3 4.7 8.2 6.4 4.3 3.3 -0.2 -3.3 1.7 MIXING RATIO (G/KG) 3.78 3.28 5.05 5.22 5.61 6.53 8.34 7.45 6.48 5.86 4.49 3.69 5.48 VAPOUR PRESSURE (HPA) 5.10 4.42 6.79 7.03 7.52 8.74 11.12 9.96 8.70 7.91 6.08 4.97 7.36 SATURATION DEF. (HPA) 1.79 2.72 3.54 11.06 14.18 23.04 27.67 27.34 20.45 10.89 6.48 2.79 12.66 RELATIVE HUMIDITY (MEAN %) 76 64 69 42 38 30 30 28 33 44 52 67 48 RELATIVE HUMIDITY (MAX. %) 90 81 85 59 54 43 42 40 47 58 69 85 63 RELATIVE HUMIDITY (MIN. %) 57 45 52 28 24 19 21 19 23 32 37 47 34 RELATIVE HUMIDITY (MEAN% 03UTC) 81 69 76 51 50 40 39 35 39 54 64 74 56 RELATIVE HUMIDITY (MEAN% 09UTC) 64 54 61 35 31 22 24 23 26 34 42 53 39 RELATIVE HUMIDITY (MEAN% 15UTC) 77 66 65 37 31 23 25 27 32 45 51 69 46 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 31.0 64.8 150.4 41.1 9.5 7.0 0.0 0.0 0.3 8.6 0.9 112.2 425.8 DAYS WITH PRECIPITATION >=10 0 3 5 1 0 0 0 0 0 0 0 3 12 DAYS WITH PRECIPITATION >= 5 3 7 7 1 0 0 0 0 0 0 0 4 22 DAYS WITH PRECIPITATION >= 1 7 8 12 5 4 3 0 0 0 4 0 12 55 DAYS WITH PRECIPITATION 17 13 20 8 11 4 0 0 1 8 4 16 102 GREATEST DAILY PRECIPITATION 8.6 14.0 42.0 31.0 3.0 3.0 0.0 0.0 0.3 4.0 0.5 36.0 42.0 DAY 21 22 6 4 24 18 ** ** 26 15 22 9 DAY WITH THUNDER STORM 1 0 5 4 3 3 0 0 0 4 2 3 25 DAYS WITH SNOW OR SLEET 11 9 4 0 0 0 0 0 0 0 0 8 32 DAYS WITH DUST 0 0 0 2 2 0 0 0 0 0 0 0 4 WIND DIRECTION (PREVAILING) 360 225 180 225 270 270 270 225 225 180 225 45 225 PREVAILING WIND SPEED(KNOTS) 4.8 4.5 4.8 7.9 8.6 4.7 6.0 4.7 5.9 4.8 5.1 4.8 6.3 PREVAILING WIND PERCENT 2.0 1.8 2.0 5.0 10.5 4.6 2.4 4.4 6.3 4.0 2.9 2.0 3.3 CALMS PERCENT OF WIND 91.5 93.3 92.3 82.1 71.0 84.6 92.3 86.7 81.3 85.9 91.3 94.0 87.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 302 301 216 253 257 244 338 228 264 197 264 32 257 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.1 0.1 0.6 1.5 0.4 0.2 0.2 0.4 0.2 0.1 R< 0.1 0.3 WIND STEADINESES (MEAN %) 40.0 33.3 25.0 46.2 71.4 44.4 33.3 33.3 40.0 28.6 25.0 11.7 37.5 WIND SPEED (MEAN KNOTS) 0.5 0.3 0.4 1.3 2.1 0.9 0.6 0.6 1.0 0.7 0.4 0.3 0.8 FASTEST WIND DIRECTION 330 320 220 20 250 360 30 150 300 70 330 30 360 FASTEST WIND SPEED (KNOTS) 12 10 12 19 19 27 19 8 17 12 12 8 27 DAY 5 4 7 13 16 18 4 12 24 8 19 3 DAYS WITH SKY CLEAR (0-2)/8 8 8 2 10 17 25 27 31 29 14 14 15 200 DAYS WITH P.CLOUDY (3-6)/8 15 9 15 16 10 4 4 0 1 14 15 5 108 DAYS WITH CLOUDY (7-8)/8 8 11 14 4 4 1 0 0 0 3 1 11 57 DAYS WITH VISIBILITY =< 2 KM 16 8 5 0 0 0 0 0 0 1 0 3 33 DURATION OF SUNSHINE HOURS 110.5 121.0 106.2 238.7 284.1 326.2 346.8 350.2 305.3 215.5 173.6 126.5 2704.6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 845.2 845.1 843.2 844.3 841.6 842.0 840.6 842.1 846.2 848.8 848.7 844.5 844.3 MAX. QFE PRESSURE IN HPA 853.2 855.8 850.7 849.4 848.5 848.8 844.9 846.9 852.0 853.0 853.6 852.6 855.8 DAY-HOUR 12- 6 15- 6 29- 6 19- 6 25- 6 23- 6 1- 6 23- 6 27- 6 20- 6 24- 6 17- 6 MIN. QFE PRESSURE IN HPA 835.7 837.9 832.7 835.9 834.0 834.2 834.9 836.6 840.0 844.3 842.6 835.5 832.7 DAY-HOUR 25-12 21- 0 7- 0 4-15 23- 0 11-15 14- 0 11-15 8-12 4-12 5-12 31-21 MEAN QNH PRESSURE IN HPA 1018.3 1018.2 1016.0 1017.3 1014.2 1014.6 1013.0 1014.8 1019.5 1022.5 1022.5 1017.5 1017.4 MAX. QNH PRESSURE IN HPA 1027.7 1030.7 1024.8 1023.2 1022.2 1022.5 1018.0 1020.3 1026.3 1027.4 1028.1 1027.0 1030.7 DAY-HOUR 12- 6 15- 6 29- 6 19- 6 25- 6 23- 6 1- 6 23- 6 27- 6 20- 6 24- 6 17- 6 MIN. QNH PRESSURE IN HPA 1007.3 1009.9 1003.8 1007.5 1005.3 1005.6 1006.4 1008.4 1012.3 1017.3 1015.3 1007.1 1003.8 DAY-HOUR 25-12 21- 0 7- 0 4-15 23- 0 11-15 14- 0 11-15 8-12 4-12 5-12 31-21 MEAN QFF PRESSURE IN HPA 1020.6 1020.5 1014.4 1010.4 1005.3 1001.9 998.0 1000.3 1007.8 1015.0 1019.2 1018.7 1011.0 MAX. QFF PRESSURE IN HPA 1030.9 1036.8 1026.3 1020.7 1017.8 1010.7 1004.3 1007.3 1020.3 1020.4 1027.2 1030.7 1036.8 DAY-HOUR 12- 6 15- 3 12- 6 14- 6 25- 3 23- 6 12- 6 23- 3 27- 6 13- 6 24- 3 17- 6 MIN. QFF PRESSURE IN HPA 1008.5 1008.2 1003.6 1000.9 996.1 991.8 990.8 993.5 995.5 1009.0 1008.0 1007.8 990.8 DAY-HOUR 25-12 21- 0 7- 0 10- 0 23- 0 12- 3 8-12 6-15 8-12 4-12 5-12 1-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 845.1 844.7 842.8 843.9 841.5 841.8 840.5 841.9 845.8 848.5 848.7 844.4 844.1 MAX. QFE PRESSURE IN HPA 851.9 853.5 848.7 848.6 846.7 847.0 843.4 845.6 850.4 851.7 852.0 850.2 853.5 DAY 13 15 30 15 25 23 1 23 17 21 24 17 MIN. QFE PRESSURE IN HPA 836.0 837.9 832.7 836.7 834.0 834.2 834.9 837.4 840.3 845.0 843.1 838.2 832.7 DAY 26 21 7 5 23 12 14 12 8 5 6 26 MEAN QNH PRESSURE IN HPA 1018.2 1017.8 1015.6 1016.9 1014.0 1014.4 1012.9 1014.5 1019.1 1022.2 1022.4 1017.4 1017.1 MAX. QNH PRESSURE IN HPA 1026.2 1028.0 1022.4 1022.3 1020.1 1020.5 1016.3 1018.8 1024.4 1025.9 1026.3 1024.2 1028.0 DAY 13 15 30 15 25 23 1 23 17 21 24 17 MIN. QNH PRESSURE IN HPA 1007.7 1009.9 1003.8 1008.5 1005.3 1005.6 1006.4 1009.3 1012.7 1018.1 1015.9 1010.2 1003.8 DAY 26 21 7 5 23 12 14 12 8 5 6 26 MEAN QFF PRESSURE IN HPA 1020.2 1019.9 1013.8 1009.9 1005.1 1001.7 997.9 999.8 1006.9 1014.4 1018.7 1018.2 1010.5 MAX. QFF PRESSURE IN HPA 1028.9 1034.7 1021.8 1019.8 1016.0 1008.2 1001.4 1004.8 1017.6 1018.7 1025.1 1027.6 1034.7 DAY 12 15 12 14 25 23 12 23 27 17 24 18 MIN. QFF PRESSURE IN HPA 1009.1 1008.2 1003.6 1000.9 996.1 992.0 991.0 994.6 996.4 1009.8 1009.6 1010.0 991.0 DAY 26 21 7 10 23 12 8 7 8 5 5 1 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 845.2 845.0 843.3 844.6 842.0 842.6 841.2 842.6 846.5 849.0 849.0 844.6 844.6 MAX. QFE PRESSURE IN HPA 852.4 854.2 848.9 848.8 848.1 848.0 844.6 846.6 850.8 852.2 853.0 851.3 854.2 DAY 13 15 29 15 25 23 1 23 16 13 24 17 MIN. QFE PRESSURE IN HPA 836.4 838.5 833.3 837.4 834.6 834.4 835.4 837.8 840.9 845.7 843.7 839.2 833.3 DAY 26 21 7 5 23 12 14 12 8 15 6 26 MEAN QNH PRESSURE IN HPA 1018.4 1018.1 1016.1 1017.7 1014.6 1015.3 1013.7 1015.3 1019.9 1022.8 1022.7 1017.7 1017.7 MAX. QNH PRESSURE IN HPA 1026.7 1028.8 1022.7 1022.5 1021.7 1021.6 1017.7 1020.0 1024.9 1026.5 1027.4 1025.5 1028.8 DAY 13 15 29 15 25 23 1 23 16 13 24 17 MIN. QNH PRESSURE IN HPA 1008.1 1010.6 1004.5 1009.3 1006.0 1005.8 1007.0 1009.7 1013.4 1018.9 1016.6 1011.4 1004.5 DAY 26 21 7 5 23 12 14 12 8 15 6 26 MEAN QFF PRESSURE IN HPA 1021.4 1021.1 1014.8 1011.3 1006.0 1002.6 998.9 1001.4 1009.1 1016.3 1020.3 1019.7 1011.9 MAX. QFF PRESSURE IN HPA 1030.1 1036.8 1024.0 1020.4 1017.8 1009.6 1002.7 1007.3 1019.4 1020.1 1027.2 1029.8 1036.8 DAY 13 15 12 14 25 23 1 23 27 20 24 17 MIN. QFF PRESSURE IN HPA 1010.7 1009.6 1004.5 1002.5 997.8 991.8 992.4 995.9 1000.1 1012.3 1011.5 1011.2 991.8 DAY 26 21 7 10 23 12 8 6 8 5 4 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 846.1 845.9 844.2 845.4 842.5 843.1 841.8 843.3 847.3 849.8 849.8 845.3 845.4 MAX. QFE PRESSURE IN HPA 853.2 855.8 850.7 849.4 848.5 848.8 844.9 846.9 852.0 853.0 853.6 852.6 855.8 DAY 12 15 29 19 25 23 1 23 27 20 24 17 MIN. QFE PRESSURE IN HPA 837.3 839.9 834.0 837.9 835.3 835.0 836.3 838.5 841.3 846.1 844.4 840.9 834.0 DAY 26 21 7 10 23 12 8 12 8 15 6 26 MEAN QNH PRESSURE IN HPA 1019.4 1019.2 1017.1 1018.6 1015.2 1016.0 1014.4 1016.2 1020.8 1023.7 1023.7 1018.5 1018.6 MAX. QNH PRESSURE IN HPA 1027.7 1030.7 1024.8 1023.2 1022.2 1022.5 1018.0 1020.3 1026.3 1027.4 1028.1 1027.0 1030.7 DAY 12 15 29 19 25 23 1 23 27 20 24 17 MIN. QNH PRESSURE IN HPA 1009.2 1012.2 1005.3 1009.9 1006.8 1006.5 1008.0 1010.6 1013.8 1019.4 1017.4 1013.4 1005.3 DAY 26 21 7 10 23 12 8 12 8 15 6 26 MEAN QFF PRESSURE IN HPA 1021.6 1021.6 1015.6 1011.6 1006.3 1003.2 999.4 1001.8 1009.1 1016.2 1020.3 1019.6 1012.2 MAX. QFF PRESSURE IN HPA 1030.9 1036.5 1026.3 1020.7 1017.2 1010.7 1004.3 1007.0 1020.3 1020.4 1026.5 1030.7 1036.5 DAY 12 15 12 14 25 23 12 23 27 13 27 17 MIN. QFF PRESSURE IN HPA 1010.2 1011.7 1004.6 1002.9 998.6 992.8 992.7 996.0 999.2 1012.0 1010.1 1012.1 992.7 DAY 26 21 7 10 23 12 8 12 8 5 5 1 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 845.2 845.4 843.6 844.8 842.0 842.6 841.2 842.8 846.7 849.1 849.0 844.6 844.7 MAX. QFE PRESSURE IN HPA 852.6 855.5 850.2 848.9 848.2 848.6 844.2 846.3 851.2 852.1 853.2 851.3 855.5 DAY 12 15 29 14 25 23 1 22 17 20 24 17 MIN. QFE PRESSURE IN HPA 837.0 839.5 833.8 838.2 836.2 835.4 836.1 838.0 841.2 845.6 843.3 840.6 833.8 DAY 25 4 7 5 23 12 8 12 8 4 5 1 MEAN QNH PRESSURE IN HPA 1018.3 1018.6 1016.5 1017.9 1014.7 1015.4 1013.7 1015.5 1020.1 1022.9 1022.7 1017.6 1017.8 MAX. QNH PRESSURE IN HPA 1027.0 1030.3 1024.2 1022.7 1021.8 1022.3 1017.2 1019.6 1025.3 1026.4 1027.7 1025.5 1030.3 DAY 12 15 29 14 25 23 1 22 17 20 24 17 MIN. QNH PRESSURE IN HPA 1008.8 1011.7 1005.1 1010.2 1007.9 1007.0 1007.8 1010.0 1013.7 1018.8 1016.1 1013.0 1005.1 DAY 25 4 7 5 23 12 8 12 8 4 5 1 MEAN QFF PRESSURE IN HPA 1020.2 1020.5 1014.7 1010.8 1005.6 1002.5 998.6 1000.9 1008.1 1014.9 1019.0 1018.4 1011.2 MAX. QFF PRESSURE IN HPA 1028.7 1035.1 1025.2 1020.0 1016.3 1009.9 1002.4 1006.5 1018.3 1018.9 1026.0 1028.8 1035.1 DAY 12 15 12 14 25 23 12 22 27 13 24 17 MIN. QFF PRESSURE IN HPA 1010.1 1010.5 1003.8 1003.8 999.1 994.2 992.1 994.7 998.7 1010.8 1008.1 1010.6 992.1 DAY 25 28 7 10 28 11 8 12 8 4 5 1 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 844.5 844.4 842.6 843.7 841.0 841.4 839.9 841.4 845.4 848.0 847.9 843.8 843.7 MAX. QFE PRESSURE IN HPA 851.8 854.6 848.8 847.5 847.5 847.4 843.0 844.7 849.6 851.0 852.2 850.4 854.6 DAY 12 15 12 15 25 23 1 23 17 13 24 17 MIN. QFE PRESSURE IN HPA 835.7 838.1 833.6 837.3 835.2 834.8 835.3 837.0 840.0 844.3 842.6 837.1 833.6 DAY 25 4 6 10 22 12 8 12 8 4 5 25 MEAN QNH PRESSURE IN HPA 1017.5 1017.5 1015.3 1016.6 1013.5 1014.0 1012.2 1013.9 1018.5 1021.6 1021.5 1016.7 1016.6 MAX. QNH PRESSURE IN HPA 1026.0 1029.3 1022.5 1021.0 1021.0 1020.9 1015.8 1017.8 1023.5 1025.1 1026.5 1024.4 1029.3 DAY 12 15 12 15 25 23 1 23 17 13 24 17 MIN. QNH PRESSURE IN HPA 1007.3 1010.1 1004.9 1009.2 1006.7 1006.3 1006.8 1008.8 1012.3 1017.3 1015.3 1008.9 1004.9 DAY 25 4 6 10 22 12 8 12 8 4 5 25 MEAN QFF PRESSURE IN HPA 1019.4 1019.4 1013.5 1009.5 1004.5 1001.2 997.3 999.2 1006.2 1013.7 1017.9 1017.7 1010.0 MAX. QFF PRESSURE IN HPA 1028.2 1034.5 1023.0 1017.3 1015.4 1008.9 1001.3 1004.5 1016.2 1017.6 1025.1 1028.0 1034.5 DAY 12 15 12 14 25 23 11 27 27 13 27 17 MIN. QFF PRESSURE IN HPA 1008.5 1008.7 1004.4 1002.3 996.5 993.0 990.8 994.1 995.5 1009.0 1008.0 1007.8 990.8 DAY 25 28 7 10 22 11 8 12 8 4 5 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 844.9 844.8 842.7 843.4 840.7 841.1 839.5 841.1 845.4 848.2 848.2 844.2 843.7 MAX. QFE PRESSURE IN HPA 852.4 854.8 848.4 847.5 846.7 845.9 842.4 844.5 849.7 851.2 852.2 850.8 854.8 DAY 12 15 12 19 25 23 1 22 30 13 24 17 MIN. QFE PRESSURE IN HPA 836.2 838.5 834.2 835.9 834.4 834.2 835.4 836.6 840.1 844.6 843.1 837.0 834.2 DAY 25 4 6 4 22 11 13 11 8 4 5 25 MEAN QNH PRESSURE IN HPA 1018.0 1017.9 1015.5 1016.3 1013.2 1013.5 1011.7 1013.6 1018.6 1021.9 1021.9 1017.2 1016.6 MAX. QNH PRESSURE IN HPA 1026.7 1029.5 1022.1 1021.0 1020.1 1019.2 1015.1 1017.5 1023.6 1025.3 1026.5 1024.9 1029.5 DAY 12 15 12 19 25 23 1 22 30 13 24 17 MIN. QNH PRESSURE IN HPA 1007.9 1010.6 1005.6 1007.5 1005.8 1005.6 1007.0 1008.4 1012.4 1017.7 1015.9 1008.8 1005.6 DAY 25 4 6 4 22 11 13 11 8 4 5 25 MEAN QFF PRESSURE IN HPA 1020.9 1020.7 1014.1 1009.8 1004.5 1000.9 996.9 999.4 1007.8 1015.3 1019.5 1019.2 1010.8 MAX. QFF PRESSURE IN HPA 1030.2 1036.4 1023.3 1017.8 1013.9 1008.2 1000.7 1004.8 1017.2 1019.2 1026.7 1029.7 1036.4 DAY 12 15 12 14 25 18 11 27 30 11 24 17 MIN. QFF PRESSURE IN HPA 1010.4 1009.4 1005.1 1003.1 996.8 992.1 991.2 993.5 999.1 1010.5 1009.5 1009.2 991.2 DAY 25 28 6 4 22 11 7 6 8 4 4 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 845.5 845.3 843.3 844.4 841.5 841.6 840.3 842.0 846.3 848.9 848.8 844.6 844.4 MAX. QFE PRESSURE IN HPA 852.9 855.0 849.5 849.1 846.3 846.9 843.3 846.1 850.6 851.7 852.3 851.1 855.0 DAY 12 15 29 28 8 23 11 31 30 20 24 17 MIN. QFE PRESSURE IN HPA 837.1 839.5 834.2 836.6 834.7 834.6 835.7 837.2 841.2 845.3 843.7 836.6 834.2 DAY 25 20 6 4 22 11 13 12 7 4 5 31 MEAN QNH PRESSURE IN HPA 1018.7 1018.4 1016.1 1017.5 1014.1 1014.2 1012.6 1014.7 1019.6 1022.7 1022.5 1017.6 1017.4 MAX. QNH PRESSURE IN HPA 1027.3 1029.8 1023.4 1022.9 1019.6 1020.3 1016.1 1019.4 1024.6 1025.9 1026.6 1025.2 1029.8 DAY 12 15 29 28 8 23 11 31 30 20 24 17 MIN. QNH PRESSURE IN HPA 1008.9 1011.7 1005.6 1008.4 1006.1 1006.0 1007.3 1009.1 1013.7 1018.5 1016.6 1008.4 1005.6 DAY 25 20 6 4 22 11 13 12 7 4 5 31 MEAN QFF PRESSURE IN HPA 1020.9 1020.7 1014.5 1010.3 1005.2 1001.4 997.7 1000.3 1008.0 1015.1 1019.1 1018.8 1011.0 MAX. QFF PRESSURE IN HPA 1030.7 1034.8 1025.0 1019.2 1013.2 1008.4 1002.4 1005.3 1017.7 1019.3 1025.5 1029.4 1034.8 DAY 12 15 12 14 24 23 11 22 27 13 24 17 MIN. QFF PRESSURE IN HPA 1010.7 1010.3 1005.3 1003.6 997.3 992.4 991.9 994.3 999.6 1010.7 1009.9 1010.6 991.9 DAY 25 20 6 9 22 11 7 6 7 4 5 31 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 845.2 845.0 843.2 844.4 841.5 841.8 840.3 842.1 846.2 848.7 848.6 844.3 844.3 MAX. QFE PRESSURE IN HPA 853.1 854.3 849.2 849.3 846.9 846.9 843.3 846.3 850.5 851.9 852.1 850.8 854.3 DAY 12 15 29 28 24 23 11 31 30 20 13 17 MIN. QFE PRESSURE IN HPA 836.7 838.7 833.7 836.9 834.2 834.6 835.5 837.8 840.9 845.1 843.3 835.5 833.7 DAY 25 20 6 4 22 11 13 11 7 4 5 31 MEAN QNH PRESSURE IN HPA 1018.4 1018.2 1016.0 1017.5 1014.1 1014.4 1012.7 1014.7 1019.6 1022.4 1022.3 1017.4 1017.3 MAX. QNH PRESSURE IN HPA 1027.6 1028.9 1023.0 1023.1 1020.3 1020.3 1016.1 1019.6 1024.5 1026.2 1026.4 1024.9 1028.9 DAY 12 15 29 28 24 23 11 31 30 20 13 17 MIN. QNH PRESSURE IN HPA 1008.5 1010.8 1005.0 1008.7 1005.6 1006.0 1007.1 1009.7 1013.4 1018.2 1016.1 1007.1 1005.0 DAY 25 20 6 4 22 11 13 11 7 4 5 31 MEAN QFF PRESSURE IN HPA 1020.2 1020.1 1014.2 1010.3 1005.0 1001.5 997.5 1000.1 1007.7 1014.3 1018.7 1018.2 1010.6 MAX. QFF PRESSURE IN HPA 1029.5 1033.9 1023.4 1019.0 1014.4 1008.1 1002.0 1006.7 1017.8 1018.9 1024.7 1028.5 1033.9 DAY 12 14 12 14 24 23 11 22 27 16 27 17 MIN. QFF PRESSURE IN HPA 1009.9 1008.5 1004.1 1003.1 996.7 992.7 991.6 993.7 998.5 1010.3 1009.1 1008.8 991.6 DAY 25 20 6 9 22 11 7 6 7 4 5 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.1 1.5 3.6 12.6 15.3 23.8 29.3 25.1 20.8 15.6 10.2 3.6 13.4 MINIMUN AIR TEMPERATURE (C) -4.0 -2.0 0.1 8.1 11.0 18.4 24.1 19.9 15.3 10.6 6.1 0.6 9.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 8 30 13 0 0 0 0 51 DAYS WITH MINIMUM TEMP. <=-4 16 9 5 0 0 0 0 0 0 0 2 2 34 DAYS WITH FREEZING MIN.<= 0 27 24 17 0 0 0 0 0 0 0 3 13 84 TEMPERATURE RECORDS LOWEST(C) -9.4 -7.0 -8.0 1.5 3.0 14.0 20.6 13.5 12.4 7.0 -4.0 -7.0 -9.4 DAY 28 12 12 3 5 5 14 31 30 18 27 29 MAXIMUM AIR TEMPERATURE (C) 3.0 5.8 7.7 17.7 19.7 28.9 34.3 30.5 26.8 21.7 15.8 7.1 18.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 12 31 20 0 0 0 0 63 DAYS WITH MAXIMUM TEMP. <= 0 7 1 1 0 0 0 0 0 0 0 0 1 10 TEMPERATURE RECORDS HIGHEST(C) 7.7 11.0 17.0 24.0 28.4 35.0 37.8 35.0 29.5 26.0 20.6 12.4 37.8 DAY 20 22 29 21 30 30 5 1 25 11 1 2 DIF. BETWEEN (MAX.-MIN.) (C) 7.0 7.8 7.6 9.6 8.7 10.5 10.2 10.6 11.5 11.1 9.7 6.5 9.2 MEAN DAILY TEMP. (MDT) (C) -0.5 1.9 3.9 12.9 15.4 23.6 29.2 25.2 21.0 16.1 10.9 3.9 13.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 3.2 81.8 254.7 135.0 17.1 0.0 0.0 0.0 491.8 HEATING DEG. DAYS(BASE 18 0C) 574.3 466.6 437.5 154.3 100.1 0.0 0.0 0.0 2.3 65.2 212.7 438.4 2451.4 DEWPOINT (MEAN C) -6.9 -5.8 -4.2 1.4 5.0 6.3 6.8 7.1 2.7 2.8 -0.8 -3.3 0.9 MIXING RATIO (G/KG) 2.82 3.08 3.61 5.21 6.72 7.26 7.67 7.73 5.65 5.75 4.45 3.80 5.31 VAPOUR PRESSURE (HPA) 3.81 4.14 4.86 6.99 9.02 9.71 10.24 10.36 7.62 7.76 6.02 5.13 7.14 SATURATION DEF. (HPA) 2.00 2.88 3.39 8.17 9.29 20.59 31.17 22.40 17.64 10.55 6.94 2.97 11.50 RELATIVE HUMIDITY (MEAN %) 67 60 60 50 56 34 26 34 32 44 49 64 48 RELATIVE HUMIDITY (MAX. %) 85 80 78 71 72 49 35 49 43 55 67 82 64 RELATIVE HUMIDITY (MIN. %) 45 41 44 32 39 23 18 24 22 34 33 45 33 RELATIVE HUMIDITY (MEAN% 03UTC) 75 69 70 62 62 44 33 42 39 51 60 71 57 RELATIVE HUMIDITY (MEAN% 09UTC) 54 50 51 42 50 27 21 27 24 38 36 49 39 RELATIVE HUMIDITY (MEAN% 15UTC) 68 61 57 43 49 30 23 30 32 45 51 66 46 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 63.3 67.8 113.1 76.0 83.1 13.8 0.4 20.0 0.0 0.0 10.0 71.3 518.8 DAYS WITH PRECIPITATION >=10 2 2 5 2 4 0 0 1 0 0 0 3 19 DAYS WITH PRECIPITATION >= 5 7 4 10 5 7 1 0 2 0 0 1 6 43 DAYS WITH PRECIPITATION >= 1 9 9 14 10 12 5 0 2 0 0 2 9 72 DAYS WITH PRECIPITATION 14 12 15 12 18 10 2 2 0 1 8 13 107 GREATEST DAILY PRECIPITATION 18.9 21.0 23.0 32.6 21.2 6.7 0.2 13.0 0.0 0.0 8.0 19.3 32.6 DAY 17 25 15 27 2 4 9 29 ** ** 8 7 DAY WITH THUNDER STORM 0 0 1 2 7 9 0 0 0 0 0 0 19 DAYS WITH SNOW OR SLEET 14 9 5 0 0 0 0 0 0 0 1 7 36 DAYS WITH DUST 0 0 1 1 0 0 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 45 270 270 225 225 225 225 225 225 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 4.4 7.4 5.1 5.6 7.5 5.2 6.8 5.0 4.9 4.2 4.0 4.2 4.7 PREVAILING WIND PERCENT 4.0 3.0 2.8 3.8 3.2 5.0 3.2 5.6 6.3 6.9 5.8 4.0 3.0 CALMS PERCENT OF WIND 91.5 90.5 93.1 82.1 88.3 81.7 92.3 89.1 78.3 79.0 85.4 87.1 86.6 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 14 341 304 300 249 257 226 227 257 250 91 291 266 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.1 0.2 0.4 0.4 0.5 0.3 0.3 0.5 0.1 0.1 0.3 0.2 WIND STEADINESES (MEAN %) 25.0 16.7 50.0 33.3 50.0 45.5 60.0 60.0 45.5 10.0 14.3 42.9 28.6 WIND SPEED (MEAN KNOTS) 0.4 0.6 0.4 1.2 0.8 1.1 0.5 0.5 1.1 1.0 0.7 0.7 0.7 FASTEST WIND DIRECTION 30 280 360 300 300 280 270 280 260 220 250 310 300 FASTEST WIND SPEED (KNOTS) 12 14 14 16 19 17 16 10 14 8 12 14 19 DAY 2 5 30 26 17 2 9 12 21 26 23 27 DAYS WITH SKY CLEAR (0-2)/8 8 9 8 12 7 20 27 26 29 25 12 9 192 DAYS WITH P.CLOUDY (3-6)/8 18 9 13 8 16 9 4 4 1 5 16 8 111 DAYS WITH CLOUDY (7-8)/8 5 11 10 10 8 1 0 1 0 1 2 14 63 DAYS WITH VISIBILITY =< 2 KM 11 2 3 0 4 0 0 0 0 0 0 5 25 DURATION OF SUNSHINE HOURS 116.6 119.1 149.1 220.2 185.7 313.2 342.6 331.2 309.6 266.4 164.6 108.0 2626.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 844.2 841.5 843.1 842.2 844.6 841.6 841.3 844.0 846.4 847.6 848.0 845.4 844.2 MAX. QFE PRESSURE IN HPA 854.5 848.7 852.0 846.6 850.2 848.1 845.4 850.7 851.3 852.7 856.9 850.9 856.9 DAY-HOUR 10- 6 16- 6 12-18 20- 6 29- 6 11- 6 6- 6 31- 6 2- 6 30- 6 4- 6 1- 6 MIN. QFE PRESSURE IN HPA 833.8 833.5 831.6 834.4 838.9 835.6 836.6 838.6 840.6 843.0 835.8 840.5 831.6 DAY-HOUR 3- 0 25- 0 30-21 18- 0 4-15 27-15 18-15 1-15 17-15 5-15 26- 0 27-21 MEAN QNH PRESSURE IN HPA 1017.2 1014.0 1015.9 1014.9 1017.7 1014.2 1013.8 1017.0 1019.7 1021.1 1021.6 1018.6 1017.1 MAX. QNH PRESSURE IN HPA 1029.2 1022.4 1026.3 1020.0 1024.2 1021.7 1018.6 1024.8 1025.5 1027.1 1032.0 1025.0 1032.0 DAY-HOUR 10- 6 16- 6 12-18 20- 6 29- 6 11- 6 6- 6 31- 6 2- 6 30- 6 4- 6 1- 6 MIN. QNH PRESSURE IN HPA 1005.1 1004.8 1002.5 1005.8 1011.0 1007.2 1008.4 1010.7 1013.0 1015.8 1007.4 1012.9 1002.5 DAY-HOUR 3- 0 25- 0 30-21 18- 0 4-15 27-15 18-15 1-15 17-15 5-15 26- 0 27-21 MEAN QFF PRESSURE IN HPA 1021.3 1016.1 1016.7 1009.5 1010.6 1001.8 998.3 1003.9 1009.4 1013.9 1018.0 1019.3 1011.6 MAX. QFF PRESSURE IN HPA 1035.6 1026.6 1032.4 1017.1 1023.5 1009.7 1004.2 1015.9 1017.2 1022.7 1027.9 1029.1 1035.6 DAY-HOUR 10- 3 16- 3 12- 6 8- 3 2-18 11- 6 15- 6 31- 6 30- 6 30- 3 4- 3 29- 3 MIN. QFF PRESSURE IN HPA 1006.0 1002.4 998.2 998.6 1002.3 993.0 992.4 994.9 1001.8 1006.9 1003.3 1013.7 992.4 DAY-HOUR 3- 0 25- 0 30-21 18- 0 31-15 27- 0 18-15 1-12 17-21 5-12 26- 0 14-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 843.8 841.4 842.7 841.7 844.5 841.5 841.2 843.8 846.2 847.4 847.7 845.2 843.9 MAX. QFE PRESSURE IN HPA 853.2 847.1 850.2 845.6 848.9 846.5 844.3 848.5 850.1 852.0 855.1 849.5 855.1 DAY 10 16 12 26 29 7 16 31 2 30 4 2 MIN. QFE PRESSURE IN HPA 833.8 833.5 832.4 834.4 840.4 836.1 837.6 839.3 841.2 843.4 835.8 840.5 832.4 DAY 3 25 31 18 10 27 19 1 18 6 26 28 MEAN QNH PRESSURE IN HPA 1016.7 1013.9 1015.5 1014.2 1017.5 1014.1 1013.7 1016.7 1019.6 1020.9 1021.2 1018.3 1016.9 MAX. QNH PRESSURE IN HPA 1027.7 1020.6 1024.2 1018.8 1022.7 1019.9 1017.3 1022.2 1024.1 1026.3 1029.9 1023.4 1029.9 DAY 10 16 12 26 29 7 16 31 2 30 4 2 MIN. QNH PRESSURE IN HPA 1005.1 1004.8 1003.5 1005.8 1012.8 1007.8 1009.5 1011.5 1013.7 1016.3 1007.4 1012.9 1003.5 DAY 3 25 31 18 10 27 19 1 18 6 26 28 MEAN QFF PRESSURE IN HPA 1020.5 1015.6 1016.1 1008.9 1010.5 1001.8 998.0 1003.2 1008.8 1013.2 1017.3 1018.8 1011.0 MAX. QFF PRESSURE IN HPA 1033.6 1025.4 1031.6 1017.0 1021.5 1008.4 1002.4 1012.4 1014.5 1019.7 1025.3 1028.3 1033.6 DAY 10 16 12 8 3 7 16 31 2 30 4 29 MIN. QFF PRESSURE IN HPA 1006.0 1002.4 998.9 998.6 1005.1 993.0 993.5 995.7 1002.5 1007.5 1003.3 1014.1 993.0 DAY 3 25 31 18 20 27 19 1 18 6 26 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 844.0 841.5 843.1 842.3 844.9 842.0 842.0 844.5 846.8 847.8 848.0 845.4 844.3 MAX. QFE PRESSURE IN HPA 853.4 847.6 850.1 846.0 849.7 846.7 845.1 849.9 850.6 852.3 855.8 849.9 855.8 DAY 10 16 13 26 29 11 16 31 2 30 4 2 MIN. QFE PRESSURE IN HPA 836.0 834.9 832.4 835.5 839.9 836.6 838.7 839.7 841.7 844.2 837.4 841.3 832.4 DAY 3 25 31 18 10 27 19 1 18 6 26 28 MEAN QNH PRESSURE IN HPA 1017.0 1014.0 1015.9 1014.9 1018.0 1014.7 1014.6 1017.5 1020.2 1021.3 1021.6 1018.6 1017.4 MAX. QNH PRESSURE IN HPA 1027.9 1021.2 1024.1 1019.3 1023.6 1020.1 1018.2 1023.8 1024.6 1026.6 1030.7 1023.8 1030.7 DAY 10 16 13 26 29 11 16 31 2 30 4 2 MIN. QNH PRESSURE IN HPA 1007.7 1006.4 1003.5 1007.1 1012.2 1008.4 1010.8 1012.0 1014.3 1017.2 1009.3 1013.8 1003.5 DAY 3 25 31 18 10 27 19 1 18 6 26 28 MEAN QFF PRESSURE IN HPA 1021.7 1016.8 1017.3 1010.0 1011.0 1002.6 999.4 1004.6 1010.8 1015.5 1019.1 1020.0 1012.4 MAX. QFF PRESSURE IN HPA 1035.6 1026.6 1031.4 1017.1 1020.7 1008.3 1003.6 1015.0 1015.9 1022.7 1027.9 1029.1 1035.6 DAY 10 16 12 8 3 11 15 31 2 30 4 29 MIN. QFF PRESSURE IN HPA 1009.4 1005.2 1001.3 1000.1 1005.4 994.7 995.2 996.9 1005.1 1010.7 1006.7 1015.5 994.7 DAY 3 25 31 18 19 28 19 1 18 6 25 27 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 845.0 842.1 843.9 843.1 845.4 842.6 842.5 845.1 847.5 848.6 848.9 846.3 845.1 MAX. QFE PRESSURE IN HPA 854.5 848.7 851.6 846.6 850.2 848.1 845.4 850.7 851.3 852.7 856.9 850.9 856.9 DAY 10 16 12 20 29 11 6 31 2 30 4 1 MIN. QFE PRESSURE IN HPA 838.1 835.4 832.8 836.3 840.0 837.2 839.2 839.6 842.7 846.2 839.7 842.8 832.8 DAY 3 11 31 18 4 27 10 1 18 5 26 27 MEAN QNH PRESSURE IN HPA 1018.2 1014.7 1016.9 1015.9 1018.5 1015.3 1015.3 1018.3 1021.1 1022.4 1022.6 1019.7 1018.2 MAX. QNH PRESSURE IN HPA 1029.2 1022.4 1025.8 1020.0 1024.2 1021.7 1018.6 1024.8 1025.5 1027.1 1032.0 1025.0 1032.0 DAY 10 16 12 20 29 11 6 31 2 30 4 1 MIN. QNH PRESSURE IN HPA 1010.1 1007.0 1003.9 1008.0 1012.3 1009.1 1011.4 1011.8 1015.5 1019.5 1012.0 1015.6 1003.9 DAY 3 11 31 18 4 27 10 1 18 5 26 27 MEAN QFF PRESSURE IN HPA 1022.3 1016.8 1017.7 1010.5 1011.5 1003.0 999.8 1005.2 1010.6 1015.0 1018.8 1020.4 1012.7 MAX. QFF PRESSURE IN HPA 1034.6 1026.4 1032.4 1016.7 1021.4 1009.7 1004.2 1015.9 1017.2 1021.1 1027.7 1028.3 1034.6 DAY 10 16 12 8 2 11 15 31 30 30 4 29 MIN. QFF PRESSURE IN HPA 1012.1 1006.3 1000.6 1002.1 1005.8 995.0 995.8 996.3 1004.6 1010.4 1008.1 1016.1 995.0 DAY 3 25 31 18 31 27 10 1 18 5 25 19 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 844.4 841.8 843.6 842.7 845.1 842.2 842.0 844.7 846.9 847.9 848.0 845.3 844.5 MAX. QFE PRESSURE IN HPA 853.7 848.4 851.6 846.3 849.9 847.4 845.0 849.8 850.6 851.5 855.3 849.8 855.3 DAY 10 16 12 8 28 11 6 31 1 30 4 1 MIN. QFE PRESSURE IN HPA 838.8 835.4 833.5 836.4 839.3 836.6 838.7 839.2 842.3 845.2 839.3 841.2 833.5 DAY 3 11 31 18 4 27 10 1 18 24 26 27 MEAN QNH PRESSURE IN HPA 1017.4 1014.4 1016.5 1015.5 1018.3 1014.8 1014.6 1017.8 1020.3 1021.5 1021.6 1018.4 1017.6 MAX. QNH PRESSURE IN HPA 1028.2 1022.1 1025.8 1019.6 1023.8 1020.9 1018.1 1023.7 1024.6 1025.7 1030.1 1023.7 1030.1 DAY 10 16 12 8 28 11 6 31 1 30 4 1 MIN. QNH PRESSURE IN HPA 1010.9 1007.0 1004.8 1008.1 1011.5 1008.4 1010.8 1011.4 1015.0 1018.4 1011.5 1013.7 1004.8 DAY 3 11 31 18 4 27 10 1 18 24 26 27 MEAN QFF PRESSURE IN HPA 1021.1 1016.1 1017.0 1010.0 1011.2 1002.3 999.0 1004.6 1009.6 1013.7 1017.4 1018.8 1011.7 MAX. QFF PRESSURE IN HPA 1033.0 1025.7 1031.3 1016.3 1022.1 1007.8 1003.1 1014.6 1015.8 1019.3 1025.2 1026.0 1033.0 DAY 10 16 12 8 2 10 15 31 30 17 4 29 MIN. QFF PRESSURE IN HPA 1012.8 1006.3 1001.4 1002.3 1003.6 993.7 995.5 995.9 1003.8 1009.2 1006.7 1014.1 993.7 DAY 17 25 31 18 31 27 10 1 18 14 25 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 843.7 840.8 842.7 841.8 844.2 841.2 840.7 843.4 845.8 846.9 847.3 844.7 843.6 MAX. QFE PRESSURE IN HPA 852.9 847.4 851.3 845.7 849.0 846.3 843.6 848.9 849.1 851.8 854.5 849.1 854.5 DAY 10 16 12 8 2 11 6 31 2 29 4 1 MIN. QFE PRESSURE IN HPA 837.1 835.0 833.7 835.7 839.6 836.0 837.3 838.8 841.4 843.3 839.6 840.6 833.7 DAY 30 11 30 18 4 27 10 1 17 5 25 19 MEAN QNH PRESSURE IN HPA 1016.6 1013.3 1015.4 1014.4 1017.1 1013.7 1013.1 1016.2 1019.0 1020.3 1020.8 1017.8 1016.5 MAX. QNH PRESSURE IN HPA 1027.3 1020.9 1025.5 1018.9 1022.8 1019.6 1016.5 1022.7 1022.9 1026.0 1029.2 1022.9 1029.2 DAY 10 16 12 8 2 11 6 31 2 29 4 1 MIN. QNH PRESSURE IN HPA 1008.9 1006.5 1005.0 1007.3 1011.8 1007.7 1009.2 1010.9 1013.9 1016.1 1011.8 1013.0 1005.0 DAY 30 11 30 18 4 27 10 1 17 5 25 19 MEAN QFF PRESSURE IN HPA 1020.3 1015.0 1016.0 1009.0 1010.0 1001.2 997.4 1002.8 1008.3 1012.4 1016.9 1018.3 1010.6 MAX. QFF PRESSURE IN HPA 1032.3 1024.2 1030.9 1015.2 1022.2 1007.7 1002.1 1013.2 1014.1 1019.3 1024.9 1025.5 1032.3 DAY 10 16 12 8 2 11 14 31 30 29 4 29 MIN. QFF PRESSURE IN HPA 1011.5 1005.5 999.1 1001.3 1002.4 993.1 993.4 994.9 1002.2 1006.9 1006.0 1013.7 993.1 DAY 2 24 30 18 31 27 10 1 17 5 25 14 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 844.2 841.1 842.7 841.8 843.8 840.8 840.2 843.1 845.5 846.9 847.8 845.4 843.6 MAX. QFE PRESSURE IN HPA 853.2 847.0 851.6 844.7 849.1 845.3 843.0 848.5 849.0 851.7 854.7 849.9 854.7 DAY 9 16 12 21 2 10 6 31 1 29 4 1 MIN. QFE PRESSURE IN HPA 835.5 835.0 833.6 836.3 838.9 835.6 836.6 838.6 840.6 843.0 839.5 840.6 833.6 DAY 30 24 30 18 4 27 18 1 17 5 25 19 MEAN QNH PRESSURE IN HPA 1017.1 1013.6 1015.5 1014.4 1016.8 1013.2 1012.6 1015.9 1018.7 1020.3 1021.4 1018.6 1016.5 MAX. QNH PRESSURE IN HPA 1027.7 1020.5 1025.8 1017.8 1022.9 1018.5 1015.8 1022.2 1022.8 1025.9 1029.4 1023.8 1029.4 DAY 9 16 12 21 2 10 6 31 1 29 4 1 MIN. QNH PRESSURE IN HPA 1007.1 1006.5 1004.9 1008.0 1011.0 1007.2 1008.4 1010.7 1013.0 1015.8 1011.7 1013.0 1004.9 DAY 30 24 30 18 4 27 18 1 17 5 25 19 MEAN QFF PRESSURE IN HPA 1021.8 1016.4 1016.8 1009.4 1009.6 1001.1 997.3 1003.0 1009.2 1014.4 1018.9 1020.0 1011.5 MAX. QFF PRESSURE IN HPA 1034.9 1024.8 1032.0 1015.0 1022.4 1007.4 1002.2 1013.5 1015.0 1022.1 1026.7 1027.2 1034.9 DAY 9 16 12 2 2 10 14 31 30 29 4 29 MIN. QFF PRESSURE IN HPA 1009.4 1003.7 1000.8 1002.1 1002.3 993.6 992.4 995.7 1002.2 1008.6 1006.3 1014.7 992.4 DAY 2 24 30 22 31 27 18 1 17 5 25 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 844.5 841.6 843.3 842.4 844.6 841.4 840.8 844.0 846.3 847.6 848.3 845.7 844.2 MAX. QFE PRESSURE IN HPA 854.1 848.0 852.0 845.4 850.0 846.2 843.9 849.1 849.9 852.4 855.7 849.8 855.7 DAY 9 16 12 11 2 10 15 31 1 29 4 1 MIN. QFE PRESSURE IN HPA 834.8 834.8 833.6 837.6 840.3 836.2 837.1 839.2 841.7 843.7 838.6 841.1 833.6 DAY 30 24 30 18 9 27 18 1 17 5 25 19 MEAN QNH PRESSURE IN HPA 1017.6 1014.2 1016.1 1015.2 1017.7 1014.0 1013.3 1016.9 1019.6 1021.2 1022.0 1019.0 1017.2 MAX. QNH PRESSURE IN HPA 1028.7 1021.6 1026.3 1018.6 1023.9 1019.5 1016.8 1022.9 1023.8 1026.7 1030.6 1023.7 1030.6 DAY 9 16 12 11 2 10 15 31 1 29 4 1 MIN. QNH PRESSURE IN HPA 1006.3 1006.3 1004.9 1009.5 1012.7 1007.9 1008.9 1011.4 1014.3 1016.6 1010.7 1013.6 1004.9 DAY 30 24 30 18 9 27 18 1 17 5 25 19 MEAN QFF PRESSURE IN HPA 1021.7 1016.3 1016.8 1009.6 1010.6 1001.7 997.8 1003.8 1009.2 1013.9 1018.2 1019.8 1011.6 MAX. QFF PRESSURE IN HPA 1035.1 1025.0 1032.0 1016.5 1023.5 1008.1 1002.4 1013.5 1016.5 1020.6 1026.3 1028.9 1035.1 DAY 9 16 12 7 2 7 14 31 30 29 4 28 MIN. QFF PRESSURE IN HPA 1008.0 1003.3 1000.8 1002.9 1004.0 993.8 992.9 995.9 1002.8 1007.5 1005.1 1014.6 992.9 DAY 2 24 30 17 31 27 18 1 17 5 25 19 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 844.4 841.7 843.0 842.2 844.5 841.4 841.1 844.0 846.3 847.7 848.1 845.3 844.1 MAX. QFE PRESSURE IN HPA 853.6 847.4 851.8 845.0 849.3 846.2 843.8 849.8 849.9 852.5 855.7 850.0 855.7 DAY 9 16 12 25 2 10 14 31 2 29 4 1 MIN. QFE PRESSURE IN HPA 835.4 835.2 831.6 836.3 840.8 836.4 837.4 839.5 841.2 843.4 837.6 840.5 831.6 DAY 2 24 30 17 4 26 18 1 17 5 25 27 MEAN QNH PRESSURE IN HPA 1017.4 1014.2 1015.7 1014.9 1017.6 1013.9 1013.5 1017.0 1019.6 1021.2 1021.7 1018.5 1017.1 MAX. QNH PRESSURE IN HPA 1028.1 1020.9 1026.0 1018.1 1023.1 1019.5 1016.7 1023.7 1023.8 1026.9 1030.6 1023.9 1030.6 DAY 9 16 12 25 2 10 14 31 2 29 4 1 MIN. QNH PRESSURE IN HPA 1007.0 1006.7 1002.5 1008.0 1013.2 1008.1 1009.3 1011.7 1013.7 1016.3 1009.5 1012.9 1002.5 DAY 2 24 30 17 4 26 18 1 17 5 25 27 MEAN QFF PRESSURE IN HPA 1021.1 1016.0 1016.1 1009.2 1010.4 1001.3 997.9 1003.8 1008.9 1013.6 1017.6 1018.8 1011.2 MAX. QFF PRESSURE IN HPA 1033.5 1024.0 1030.7 1017.1 1022.0 1007.5 1002.3 1013.8 1015.5 1020.4 1026.1 1028.3 1033.5 DAY 9 15 11 7 2 6 14 31 30 29 4 28 MIN. QFF PRESSURE IN HPA 1007.4 1003.8 998.2 1001.1 1003.5 993.6 993.5 996.7 1001.8 1007.2 1004.6 1014.3 993.5 DAY 2 24 30 17 31 26 18 1 17 5 25 13 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.3 3.3 6.6 14.5 18.5 25.3 27.6 27.0 24.3 14.5 6.7 5.2 14.4 MINIMUN AIR TEMPERATURE (C) -3.9 0.2 2.8 9.8 13.4 19.2 21.9 21.3 18.7 9.7 3.8 1.7 9.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 9 22 18 9 0 0 0 58 DAYS WITH MINIMUM TEMP. <=-4 17 2 1 0 0 0 0 0 0 0 0 0 20 DAYS WITH FREEZING MIN.<= 0 27 13 10 0 0 0 0 0 0 0 8 9 67 TEMPERATURE RECORDS LOWEST(C) -9.1 -5.6 -5.0 4.0 7.6 14.2 20.0 18.0 13.0 4.8 -3.4 -3.0 -9.1 DAY 14 18 23 14 1 6 17 5 30 9 30 1 MAXIMUM AIR TEMPERATURE (C) 3.8 6.5 10.7 19.3 23.4 30.6 32.9 32.3 30.3 20.1 10.4 9.3 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 19 31 27 18 0 0 0 95 DAYS WITH MAXIMUM TEMP. <= 0 3 0 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS HIGHEST(C) 11.6 13.0 20.0 25.6 29.4 36.0 36.2 36.2 34.5 29.0 17.4 14.0 36.2 DAY 29 28 30 19 20 28 3 14 5 1 3 24 DIF. BETWEEN (MAX.-MIN.) (C) 7.7 6.3 7.9 9.5 10.0 11.4 11.0 11.0 11.6 10.4 6.6 7.6 9.2 MEAN DAILY TEMP. (MDT) (C) -0.1 3.4 6.7 14.5 18.4 24.9 27.4 26.8 24.5 14.9 7.1 5.5 14.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.1 13.4 119.3 198.2 179.9 109.3 1.2 0.0 0.0 621.4 HEATING DEG. DAYS(BASE 18 0C) 560.2 409.8 348.7 111.0 37.4 0.0 0.0 0.0 0.0 103.9 327.0 388.3 2286.3 DEWPOINT (MEAN C) -6.7 -3.4 -5.1 -0.3 3.9 4.5 8.9 10.8 9.1 2.3 1.7 -0.4 2.1 MIXING RATIO (G/KG) 2.81 3.73 3.31 4.64 6.18 6.45 8.65 9.79 8.71 5.45 5.33 4.43 5.79 VAPOUR PRESSURE (HPA) 3.81 5.03 4.47 6.24 8.30 8.64 11.55 13.08 11.67 7.38 7.19 5.99 7.78 SATURATION DEF. (HPA) 2.40 2.85 5.71 10.72 13.81 24.70 26.14 23.35 19.75 9.74 3.01 3.09 12.11 RELATIVE HUMIDITY (MEAN %) 65 65 49 40 41 28 32 38 40 47 72 69 49 RELATIVE HUMIDITY (MAX. %) 79 81 69 58 58 42 43 51 51 64 86 84 64 RELATIVE HUMIDITY (MIN. %) 48 46 32 27 26 18 24 26 27 31 56 52 34 RELATIVE HUMIDITY (MEAN% 03UTC) 72 72 60 49 51 38 41 48 48 55 79 75 57 RELATIVE HUMIDITY (MEAN% 09UTC) 53 56 42 30 32 22 26 29 30 34 62 57 39 RELATIVE HUMIDITY (MEAN% 15UTC) 65 63 43 37 35 22 27 33 40 48 72 72 46 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 56.7 153.1 96.3 38.5 13.9 4.0 0.1 0.2 0.0 10.9 94.1 19.6 487.4 DAYS WITH PRECIPITATION >=10 2 6 5 2 0 0 0 0 0 0 4 1 20 DAYS WITH PRECIPITATION >= 5 3 8 7 3 1 0 0 0 0 0 8 1 31 DAYS WITH PRECIPITATION >= 1 6 12 11 6 5 2 0 0 0 4 11 5 62 DAYS WITH PRECIPITATION 11 15 14 9 12 2 4 3 0 6 14 7 97 GREATEST DAILY PRECIPITATION 26.0 36.0 27.0 12.0 5.0 2.0 0.0 0.2 0.0 4.4 18.0 11.0 36.0 DAY 8 3 8 8 13 1 ** 9 ** 7 2 16 DAY WITH THUNDER STORM 0 2 3 1 2 2 2 0 0 1 1 1 15 DAYS WITH SNOW OR SLEET 10 9 5 0 0 0 0 0 0 0 3 5 32 DAYS WITH DUST 0 1 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 45 45 45 270 270 180 180 180 180 180 180 135 180 PREVAILING WIND SPEED(KNOTS) 4.0 4.0 5.2 5.5 6.9 4.7 4.2 4.8 4.4 6.0 5.3 4.0 4.7 PREVAILING WIND PERCENT 1.6 3.1 4.8 6.3 6.0 5.0 3.6 3.2 6.7 3.2 1.3 0.4 3.3 CALMS PERCENT OF WIND 94.8 91.5 82.3 73.8 78.6 80.8 84.3 90.3 87.5 93.1 95.3 99.2 87.6 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 247 240 248 235 247 2913 VECTOR WIND DIRECTION (MEAN) 298 0 345 260 250 235 270 241 211 218 266 165 245 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.0 0.1 0.4 0.6 0.3 0.1 0.3 0.3 0.4 0.1 R< 0.1 0.2 WIND STEADINESES (MEAN %) 33.3 0.0 10.0 28.6 46.2 33.3 11.1 60.0 50.0 80.0 33.3 ***** 28.6 WIND SPEED (MEAN KNOTS) 0.3 0.4 1.0 1.4 1.3 0.9 0.9 0.5 0.6 0.5 0.3 0.0 0.7 FASTEST WIND DIRECTION 330 270 250 30 300 270 10 330 270 240 350 150 10 FASTEST WIND SPEED (KNOTS) 8 10 16 12 14 12 21 17 10 14 14 4 21 DAY 14 15 9 14 14 2 29 27 23 11 29 6 DAYS WITH SKY CLEAR (0-2)/8 16 8 11 6 9 27 25 28 27 18 9 13 197 DAYS WITH P.CLOUDY (3-6)/8 9 9 13 15 18 3 6 3 3 10 8 11 108 DAYS WITH CLOUDY (7-8)/8 6 11 7 9 4 0 0 0 0 3 13 7 60 DAYS WITH VISIBILITY =< 2 KM 7 6 1 0 0 0 0 0 0 0 4 3 21 DURATION OF SUNSHINE HOURS 139.6 103.2 188.3 202.9 244.5 346.3 336.9 337.4 309.7 231.1 117.7 134.4 2692.0 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 845.4 844.5 843.9 843.4 844.1 842.3 842.3 844.2 845.2 850.5 846.9 848.2 845.1 MAX. QFE PRESSURE IN HPA 855.0 852.1 851.9 851.2 850.0 850.4 849.2 848.8 851.8 856.9 853.6 855.0 856.9 DAY-HOUR 6- 6 9- 6 31- 6 1- 6 9- 6 23- 3 27- 6 31- 6 23- 6 17- 6 21- 6 26- 6 MIN. QFE PRESSURE IN HPA 835.1 836.0 834.7 836.4 839.6 837.0 837.5 838.5 840.4 843.6 836.0 840.9 834.7 DAY-HOUR 9- 0 3-12 21-21 13-12 7-15 3-15 12-15 12-15 3-15 3-15 14- 3 5-12 MEAN QNH PRESSURE IN HPA 1018.6 1017.6 1016.8 1016.3 1017.0 1015.0 1014.9 1017.2 1018.4 1024.5 1020.4 1021.8 1018.2 MAX. QNH PRESSURE IN HPA 1029.8 1026.4 1026.2 1025.3 1023.9 1024.4 1023.0 1022.5 1026.0 1032.0 1028.1 1029.8 1032.0 DAY-HOUR 6- 6 9- 6 31- 6 1- 6 9- 6 23- 3 27- 6 31- 6 23- 6 17- 6 21- 6 26- 6 MIN. QNH PRESSURE IN HPA 1006.6 1007.7 1006.1 1008.1 1011.8 1008.8 1009.4 1010.6 1012.8 1016.5 1007.7 1013.4 1006.1 DAY-HOUR 9- 0 3-12 21-21 13-12 7-15 3-15 12-15 12-15 3-15 3-15 14- 3 5-12 MEAN QFF PRESSURE IN HPA 1022.2 1018.6 1015.6 1009.8 1008.0 1001.9 1000.3 1002.8 1005.6 1018.2 1018.8 1021.6 1011.9 MAX. QFF PRESSURE IN HPA 1033.3 1027.8 1025.1 1018.8 1019.6 1013.7 1009.0 1009.1 1014.9 1026.3 1028.5 1030.0 1033.3 DAY-HOUR 6- 6 9- 6 23- 3 1- 6 9- 6 23- 6 27- 6 25- 6 23- 6 8- 6 30-15 6-15 MIN. QFF PRESSURE IN HPA 1011.1 1005.6 1004.9 999.5 1001.5 996.8 994.6 995.1 998.2 1005.6 1003.2 1013.7 994.6 DAY-HOUR 9- 0 3- 9 21-21 20-18 20-15 15-18 12-15 12-18 3-12 2-18 14- 0 28-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 845.2 844.3 843.5 843.4 843.5 842.2 842.0 843.8 845.1 850.2 846.4 848.0 844.8 MAX. QFE PRESSURE IN HPA 852.5 851.5 850.1 850.0 848.7 849.7 846.6 847.4 849.7 855.3 852.4 853.5 855.3 DAY 6 10 31 1 9 23 27 26 16 17 21 27 MIN. QFE PRESSURE IN HPA 835.1 838.5 835.0 838.0 839.8 838.2 837.9 839.2 841.5 844.6 836.2 841.0 835.0 DAY 9 5 22 13 6 4 14 12 14 3 14 5 MEAN QNH PRESSURE IN HPA 1018.4 1017.3 1016.4 1016.2 1016.3 1014.9 1014.7 1016.8 1018.2 1024.2 1019.8 1021.6 1017.9 MAX. QNH PRESSURE IN HPA 1026.9 1025.7 1024.1 1023.9 1022.4 1023.6 1020.0 1020.9 1023.6 1030.1 1026.7 1028.0 1030.1 DAY 6 10 31 1 9 23 27 26 16 17 21 27 MIN. QNH PRESSURE IN HPA 1006.6 1010.6 1006.5 1010.0 1012.1 1010.2 1009.9 1011.4 1014.1 1017.7 1007.9 1013.5 1006.5 DAY 9 5 22 13 6 4 14 12 14 3 14 5 MEAN QFF PRESSURE IN HPA 1021.6 1018.1 1015.0 1009.6 1007.4 1001.5 1000.1 1002.3 1005.2 1017.3 1017.8 1021.2 1011.4 MAX. QFF PRESSURE IN HPA 1030.3 1027.0 1023.5 1017.1 1018.2 1008.2 1006.0 1007.9 1012.1 1023.8 1025.8 1027.9 1030.3 DAY 6 10 17 1 9 24 27 26 23 17 22 7 MIN. QFF PRESSURE IN HPA 1011.1 1009.4 1006.0 1002.6 1001.8 997.1 995.4 996.3 999.6 1006.8 1003.2 1015.3 995.4 DAY 9 3 22 21 29 19 14 12 4 1 14 29 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 845.3 844.3 844.0 843.5 844.2 842.8 842.9 844.7 845.6 850.6 846.8 848.0 845.2 MAX. QFE PRESSURE IN HPA 853.7 851.0 850.8 850.1 849.3 850.4 847.7 848.2 850.7 855.7 852.4 853.1 855.7 DAY 6 9 31 1 9 23 27 31 23 17 21 27 MIN. QFE PRESSURE IN HPA 835.3 838.0 835.0 838.3 840.8 839.0 838.3 839.9 841.7 845.2 836.0 841.0 835.0 DAY 9 3 22 13 7 4 13 12 14 2 14 5 MEAN QNH PRESSURE IN HPA 1018.4 1017.3 1016.9 1016.4 1017.2 1015.6 1015.7 1017.8 1018.8 1024.6 1020.3 1021.6 1018.4 MAX. QNH PRESSURE IN HPA 1028.2 1025.1 1024.9 1024.1 1023.1 1024.4 1021.3 1021.8 1024.8 1030.6 1026.7 1027.6 1030.6 DAY 6 9 31 1 9 23 27 31 23 17 21 27 MIN. QNH PRESSURE IN HPA 1006.8 1010.0 1006.5 1010.3 1013.2 1011.1 1010.3 1012.2 1014.3 1018.4 1007.7 1013.5 1006.5 DAY 9 3 22 13 7 4 13 12 14 2 14 5 MEAN QFF PRESSURE IN HPA 1022.8 1018.9 1016.3 1010.5 1008.5 1002.6 1001.0 1003.9 1006.7 1019.2 1019.2 1022.2 1012.7 MAX. QFF PRESSURE IN HPA 1031.8 1027.1 1025.1 1018.0 1019.3 1013.4 1007.0 1009.0 1014.7 1025.7 1027.3 1028.8 1031.8 DAY 6 9 23 1 9 23 27 25 23 8 30 7 MIN. QFF PRESSURE IN HPA 1011.7 1008.5 1007.2 1004.2 1002.6 998.0 996.0 997.1 1001.2 1008.2 1005.3 1015.8 996.0 DAY 9 3 22 13 29 19 13 12 14 2 14 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 846.1 845.3 844.8 844.4 844.9 843.5 843.6 845.5 846.5 851.6 847.8 849.1 846.1 MAX. QFE PRESSURE IN HPA 855.0 852.1 851.9 851.2 850.0 850.3 849.2 848.8 851.8 856.9 853.6 855.0 856.9 DAY 6 9 31 1 9 23 27 31 23 17 21 26 MIN. QFE PRESSURE IN HPA 836.8 837.8 835.9 838.5 841.4 840.0 839.5 840.8 842.5 845.9 837.4 841.8 835.9 DAY 9 3 22 13 7 4 12 12 14 2 14 5 MEAN QNH PRESSURE IN HPA 1019.4 1018.5 1017.9 1017.4 1018.0 1016.4 1016.5 1018.7 1019.9 1025.8 1021.4 1022.9 1019.4 MAX. QNH PRESSURE IN HPA 1029.8 1026.4 1026.2 1025.3 1023.9 1024.3 1023.0 1022.5 1026.0 1032.0 1028.1 1029.8 1032.0 DAY 6 9 31 1 9 23 27 31 23 17 21 26 MIN. QNH PRESSURE IN HPA 1008.6 1009.7 1007.5 1010.6 1013.9 1012.3 1011.7 1013.2 1015.2 1019.2 1009.3 1014.4 1007.5 DAY 9 3 22 13 7 4 12 12 14 2 14 5 MEAN QFF PRESSURE IN HPA 1023.1 1019.6 1016.6 1010.8 1008.9 1003.3 1001.9 1004.3 1007.0 1019.4 1019.8 1022.7 1013.1 MAX. QFF PRESSURE IN HPA 1033.3 1027.8 1024.9 1018.8 1019.6 1013.7 1009.0 1009.1 1014.9 1026.3 1027.8 1028.5 1033.3 DAY 6 9 23 1 9 23 27 25 23 8 22 7 MIN. QFF PRESSURE IN HPA 1013.4 1008.7 1008.3 1004.4 1003.0 998.9 997.3 997.7 1001.4 1006.3 1008.5 1015.7 997.3 DAY 9 3 22 13 20 19 14 12 3 2 14 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 845.5 844.9 844.3 843.8 844.6 843.1 843.0 844.9 845.9 850.9 847.2 848.3 845.5 MAX. QFE PRESSURE IN HPA 854.3 851.8 851.0 850.2 849.4 849.5 848.8 848.0 851.1 856.1 853.4 853.8 856.1 DAY 6 9 31 1 9 23 27 30 23 17 21 26 MIN. QFE PRESSURE IN HPA 836.5 836.3 836.4 837.5 840.9 839.7 838.9 840.1 842.5 845.2 839.2 841.7 836.3 DAY 8 3 22 13 7 4 12 12 14 2 11 5 MEAN QNH PRESSURE IN HPA 1018.7 1018.0 1017.3 1016.7 1017.7 1015.9 1015.8 1018.1 1019.2 1025.0 1020.7 1022.0 1018.7 MAX. QNH PRESSURE IN HPA 1028.9 1026.0 1025.1 1024.2 1023.2 1023.4 1022.5 1021.6 1025.2 1031.0 1027.9 1028.4 1031.0 DAY 6 9 31 1 9 23 27 30 23 17 21 26 MIN. QNH PRESSURE IN HPA 1008.2 1008.0 1008.1 1009.4 1013.4 1012.0 1011.0 1012.4 1015.2 1018.4 1011.4 1014.3 1008.0 DAY 8 3 22 13 7 4 12 12 14 2 11 5 MEAN QFF PRESSURE IN HPA 1021.8 1018.7 1015.8 1009.9 1008.5 1002.9 1001.0 1003.5 1006.0 1018.2 1018.9 1021.3 1012.2 MAX. QFF PRESSURE IN HPA 1032.8 1027.1 1024.4 1017.2 1018.7 1012.3 1008.0 1007.8 1014.2 1024.5 1027.7 1027.0 1032.8 DAY 6 9 23 1 9 23 27 25 23 17 30 7 MIN. QFF PRESSURE IN HPA 1012.4 1005.6 1008.7 1002.9 1002.1 998.7 995.9 997.3 1000.5 1006.6 1006.5 1015.0 995.9 DAY 8 3 10 13 20 18 12 12 14 2 11 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 844.7 843.8 843.2 842.6 843.8 841.9 841.7 843.6 844.5 849.8 846.5 847.5 844.5 MAX. QFE PRESSURE IN HPA 854.0 850.9 849.7 847.4 848.7 847.8 846.8 846.6 849.4 854.9 852.4 852.4 854.9 DAY 6 9 31 1 9 22 27 25 23 17 21 26 MIN. QFE PRESSURE IN HPA 835.8 836.0 835.7 836.4 839.7 838.6 838.0 838.9 840.7 843.6 837.8 840.9 835.7 DAY 8 3 21 13 7 3 12 12 3 28 11 5 MEAN QNH PRESSURE IN HPA 1017.8 1016.8 1016.0 1015.4 1016.8 1014.6 1014.3 1016.5 1017.5 1023.7 1019.9 1021.1 1017.5 MAX. QNH PRESSURE IN HPA 1028.6 1025.0 1023.6 1020.9 1022.4 1021.4 1020.2 1020.0 1023.2 1029.6 1026.7 1026.7 1029.6 DAY 6 9 31 1 9 22 27 25 23 17 21 26 MIN. QNH PRESSURE IN HPA 1007.4 1007.7 1007.3 1008.1 1012.0 1010.7 1010.0 1011.0 1013.1 1016.5 1009.7 1013.4 1007.3 DAY 8 3 21 13 7 3 12 12 3 28 11 5 MEAN QFF PRESSURE IN HPA 1021.0 1017.5 1014.6 1008.8 1007.7 1001.1 999.6 1002.1 1004.5 1017.0 1018.0 1020.5 1011.0 MAX. QFF PRESSURE IN HPA 1032.2 1026.5 1023.5 1014.1 1017.5 1010.4 1005.9 1007.2 1011.4 1023.0 1027.5 1026.5 1032.2 DAY 6 9 16 1 9 22 27 25 23 17 30 7 MIN. QFF PRESSURE IN HPA 1011.5 1005.8 1005.8 1000.8 1001.7 997.8 995.1 995.9 998.2 1006.1 1004.7 1013.7 995.1 DAY 8 3 21 20 20 18 14 12 3 1 11 28 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 845.2 844.3 843.3 842.6 843.5 841.3 841.1 843.0 844.2 849.9 846.8 848.1 844.4 MAX. QFE PRESSURE IN HPA 853.5 850.9 849.4 847.6 848.1 847.8 846.0 846.5 849.4 855.2 852.1 853.0 855.2 DAY 6 9 31 16 9 22 27 25 23 17 21 26 MIN. QFE PRESSURE IN HPA 835.6 836.7 836.2 837.3 839.6 837.0 837.5 838.5 840.4 843.6 838.9 841.5 835.6 DAY 8 3 21 13 7 3 12 12 3 3 13 5 MEAN QNH PRESSURE IN HPA 1018.4 1017.3 1016.2 1015.3 1016.4 1013.8 1013.5 1015.8 1017.2 1023.8 1020.2 1021.8 1017.5 MAX. QNH PRESSURE IN HPA 1028.0 1025.0 1023.2 1021.2 1021.7 1021.4 1019.3 1019.9 1023.2 1030.0 1026.4 1027.4 1030.0 DAY 6 9 31 16 9 22 27 25 23 17 21 26 MIN. QNH PRESSURE IN HPA 1007.2 1008.5 1007.9 1009.2 1011.8 1008.8 1009.4 1010.6 1012.8 1016.5 1011.0 1014.1 1007.2 DAY 8 3 21 13 7 3 12 12 3 3 13 5 MEAN QFF PRESSURE IN HPA 1022.7 1018.7 1015.5 1009.4 1007.6 1000.7 998.9 1001.8 1005.0 1018.3 1019.3 1022.2 1011.7 MAX. QFF PRESSURE IN HPA 1031.7 1027.3 1023.7 1014.8 1016.9 1010.4 1005.0 1008.1 1012.7 1024.6 1028.5 1030.0 1031.7 DAY 6 9 23 16 9 22 27 25 23 16 30 6 MIN. QFF PRESSURE IN HPA 1011.5 1006.8 1007.0 999.9 1001.5 996.9 994.6 996.1 998.6 1007.0 1007.2 1015.8 994.6 DAY 8 3 21 20 20 18 12 12 3 2 10 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 845.8 844.9 843.9 843.5 844.2 841.8 841.9 843.8 845.0 850.6 847.3 848.4 845.1 MAX. QFE PRESSURE IN HPA 854.3 851.9 850.5 847.7 848.6 848.6 846.6 847.5 849.6 855.5 853.4 853.7 855.5 DAY 6 9 31 16 9 22 27 28 23 16 21 26 MIN. QFE PRESSURE IN HPA 836.1 837.4 836.8 838.1 841.4 837.8 838.2 838.5 841.5 844.4 838.7 842.1 836.1 DAY 8 3 21 13 2 3 12 12 13 28 13 5 MEAN QNH PRESSURE IN HPA 1019.0 1018.0 1016.9 1016.4 1017.2 1014.5 1014.6 1016.7 1018.1 1024.7 1020.7 1022.1 1018.2 MAX. QNH PRESSURE IN HPA 1028.9 1026.2 1024.5 1021.3 1022.3 1022.3 1020.0 1021.0 1023.5 1030.3 1027.9 1028.2 1030.3 DAY 6 9 31 16 9 22 27 28 23 16 21 26 MIN. QNH PRESSURE IN HPA 1007.8 1009.3 1008.6 1010.1 1013.9 1009.7 1010.2 1010.6 1014.1 1017.4 1010.8 1014.8 1007.8 DAY 8 3 21 13 2 3 12 12 13 28 13 5 MEAN QFF PRESSURE IN HPA 1022.6 1018.9 1015.5 1009.7 1008.0 1001.3 999.9 1002.2 1005.2 1018.3 1019.3 1021.8 1011.9 MAX. QFF PRESSURE IN HPA 1032.8 1027.0 1023.3 1014.6 1017.0 1011.4 1005.9 1008.8 1012.4 1025.2 1027.7 1028.8 1032.8 DAY 6 9 23 24 9 22 27 25 23 8 21 6 MIN. QFF PRESSURE IN HPA 1012.3 1007.7 1005.9 999.5 1002.8 996.8 995.5 995.1 999.0 1005.6 1006.9 1015.0 995.1 DAY 8 3 5 20 20 15 14 12 3 2 13 5 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 845.5 844.6 844.1 843.6 843.9 842.1 842.1 844.1 845.1 850.5 846.9 848.2 845.1 MAX. QFE PRESSURE IN HPA 853.3 851.8 850.4 848.3 848.5 849.1 846.8 848.5 849.4 855.5 852.7 853.5 855.5 DAY 6 9 31 16 9 22 27 28 22 16 21 26 MIN. QFE PRESSURE IN HPA 835.8 838.0 834.7 838.8 841.0 838.0 838.1 839.0 841.5 844.6 837.3 841.5 834.7 DAY 8 3 21 12 5 3 13 11 13 2 13 4 MEAN QNH PRESSURE IN HPA 1018.7 1017.7 1017.1 1016.5 1016.9 1014.7 1014.7 1017.0 1018.3 1024.6 1020.3 1021.8 1018.2 MAX. QNH PRESSURE IN HPA 1027.8 1026.0 1024.4 1022.0 1022.2 1022.9 1020.2 1022.2 1023.2 1030.3 1027.1 1028.0 1030.3 DAY 6 9 31 16 9 22 27 28 22 16 21 26 MIN. QNH PRESSURE IN HPA 1007.4 1010.0 1006.1 1010.9 1013.5 1010.0 1010.1 1011.1 1014.1 1017.7 1009.2 1014.1 1006.1 DAY 8 3 21 12 5 3 13 11 13 2 13 4 MEAN QFF PRESSURE IN HPA 1021.7 1018.4 1015.6 1009.8 1007.6 1001.6 1000.0 1002.4 1005.2 1017.8 1018.7 1021.1 1011.6 MAX. QFF PRESSURE IN HPA 1031.8 1026.7 1022.3 1014.7 1018.6 1011.5 1006.1 1008.7 1012.3 1024.6 1026.4 1028.1 1031.8 DAY 6 9 15 16 8 22 27 25 23 7 22 6 MIN. QFF PRESSURE IN HPA 1011.7 1008.3 1004.9 1003.6 1002.3 996.9 995.5 995.8 999.8 1005.7 1004.8 1015.4 995.5 DAY 8 3 21 12 28 15 11 11 3 2 13 28 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.1 3.6 10.0 15.5 19.2 25.4 28.9 28.8 20.6 14.7 10.1 1.6 15.2 MINIMUN AIR TEMPERATURE (C) 0.7 -0.2 5.8 10.7 13.6 19.6 23.1 23.2 15.4 10.8 6.5 -1.9 10.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 8 27 31 0 0 0 0 66 DAYS WITH MINIMUM TEMP. <=-4 0 2 0 0 0 0 0 0 0 0 0 14 16 DAYS WITH FREEZING MIN.<= 0 20 17 0 0 0 0 0 0 0 0 0 19 56 TEMPERATURE RECORDS LOWEST(C) -2.0 -6.0 0.4 2.0 7.0 13.2 17.0 21.0 11.2 8.0 1.0 -9.4 -9.4 DAY 7 4 17 5 7 6 1 16 22 12 10 7 MAXIMUM AIR TEMPERATURE (C) 8.1 8.0 14.7 20.8 24.6 30.8 34.7 34.5 26.2 19.8 14.5 5.8 20.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 22 31 31 3 0 0 0 89 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 2 2 TEMPERATURE RECORDS HIGHEST(C) 14.0 14.2 22.2 28.6 30.0 33.6 38.6 38.0 31.0 24.0 18.8 13.4 38.6 DAY 31 27 31 24 25 20 30 1 1 15 3 2 DIF. BETWEEN (MAX.-MIN.) (C) 7.4 8.2 8.9 10.1 11.0 11.2 11.6 11.3 10.8 9.0 8.0 7.7 9.6 MEAN DAILY TEMP. (MDT) (C) 4.4 3.9 10.2 15.7 19.1 25.2 28.9 28.9 20.8 15.3 10.5 1.9 15.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 4.9 19.6 128.0 244.2 244.4 22.1 0.0 0.0 0.0 663.2 HEATING DEG. DAYS(BASE 18 0C) 420.8 395.2 240.9 91.3 31.8 0.0 0.0 0.0 1.5 84.4 225.2 498.0 1989.1 DEWPOINT (MEAN C) -2.0 -4.6 -1.0 3.0 3.8 6.3 8.0 7.1 4.0 6.4 2.8 -5.9 2.3 MIXING RATIO (G/KG) 4.06 3.31 4.35 5.78 6.08 7.36 8.19 7.73 6.20 7.24 5.77 3.16 5.77 VAPOUR PRESSURE (HPA) 5.47 4.46 5.86 7.77 8.18 9.82 10.90 10.32 8.36 9.77 7.77 4.27 7.75 SATURATION DEF. (HPA) 2.88 3.67 6.77 10.76 14.93 23.33 30.01 30.25 16.60 7.36 4.86 2.93 12.86 RELATIVE HUMIDITY (MEAN %) 67 58 50 46 39 31 29 27 36 60 63 60 47 RELATIVE HUMIDITY (MAX. %) 84 76 69 63 58 45 40 36 51 76 80 76 63 RELATIVE HUMIDITY (MIN. %) 49 41 34 32 25 21 20 19 24 43 46 42 33 RELATIVE HUMIDITY (MEAN% 03UTC) 75 69 62 56 51 41 36 33 46 70 74 68 57 RELATIVE HUMIDITY (MEAN% 09UTC) 53 49 41 36 29 28 23 20 26 47 51 50 38 RELATIVE HUMIDITY (MEAN% 15UTC) 67 55 42 41 34 25 23 23 30 56 64 57 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 63.8 61.6 30.9 45.9 34.5 1.8 0.0 0.0 1.3 27.2 191.7 18.2 476.9 DAYS WITH PRECIPITATION >=10 3 1 1 1 1 0 0 0 0 1 7 0 15 DAYS WITH PRECIPITATION >= 5 5 1 1 2 4 0 0 0 0 1 10 1 25 DAYS WITH PRECIPITATION >= 1 6 4 8 5 5 1 0 0 1 7 11 5 53 DAYS WITH PRECIPITATION 11 8 11 10 6 4 0 0 2 12 13 11 88 GREATEST DAILY PRECIPITATION 21.0 54.0 14.6 32.0 10.1 1.0 0.0 0.0 1.0 11.0 27.0 5.0 54.0 DAY 16 1 12 30 4 3 ** ** 6 23 25 3 DAY WITH THUNDER STORM 1 0 0 4 3 2 0 0 0 1 1 0 12 DAYS WITH SNOW OR SLEET 5 6 0 0 0 0 0 0 0 0 0 5 16 DAYS WITH DUST 0 1 0 0 0 1 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 180 180 180 270 270 225 180 225 225 225 225 180 225 PREVAILING WIND SPEED(KNOTS) 8.0 5.5 4.6 9.0 7.3 5.8 7.0 5.5 6.3 7.4 5.4 4.7 6.6 PREVAILING WIND PERCENT 0.8 1.8 2.8 4.2 7.7 7.5 2.4 3.2 9.6 5.6 2.9 4.4 3.6 CALMS PERCENT OF WIND 97.6 93.8 91.1 89.2 81.5 81.7 90.7 91.5 69.2 76.6 90.4 81.5 86.2 NO. OF WIND OBSERVATION 247 224 248 240 248 240 248 248 240 248 240 248 2919 VECTOR WIND DIRECTION (MEAN) 248 297 240 271 271 258 216 193 238 236 208 233 245 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.2 0.3 0.4 0.7 0.6 0.3 0.3 0.5 0.4 0.2 0.5 0.3 WIND STEADINESES (MEAN %) 50.0 50.0 50.0 44.4 53.8 50.0 60.0 60.0 29.4 28.6 40.0 41.7 33.3 WIND SPEED (MEAN KNOTS) 0.2 0.4 0.6 0.9 1.3 1.2 0.5 0.5 1.7 1.4 0.5 1.2 0.9 FASTEST WIND DIRECTION 300 330 280 30 240 20 230 270 250 240 290 290 240 FASTEST WIND SPEED (KNOTS) 12 16 16 19 27 17 10 14 12 16 19 19 27 DAY 20 8 7 22 2 1 10 26 14 15 25 5 DAYS WITH SKY CLEAR (0-2)/8 12 13 9 11 15 26 30 30 20 8 12 13 199 DAYS WITH P.CLOUDY (3-6)/8 11 8 16 12 13 3 1 1 10 18 7 11 111 DAYS WITH CLOUDY (7-8)/8 8 7 6 7 3 1 0 0 0 5 11 7 55 DAYS WITH VISIBILITY =< 2 KM 5 0 1 0 0 0 0 0 0 0 0 2 8 DURATION OF SUNSHINE HOURS 140.0 151.7 201.0 228.5 274.9 324.4 364.2 359.5 281.5 198.8 145.0 153.7 2823.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 845.4 842.5 843.3 845.0 844.2 839.9 839.1 840.9 848.1 849.5 845.7 846.5 844.2 MAX. QFE PRESSURE IN HPA 855.0 850.1 849.8 855.2 849.6 846.3 843.6 845.9 855.9 855.5 853.5 852.6 855.9 DAY-HOUR 10- 6 18- 6 18- 6 5- 9 21- 6 8- 6 13- 6 15- 6 23- 6 9- 6 2- 6 7-21 MIN. QFE PRESSURE IN HPA 835.1 835.6 834.0 836.7 837.7 834.1 835.1 835.4 841.5 843.7 833.4 832.4 832.4 DAY-HOUR 16-12 1- 3 12- 3 2-15 1-12 4-18 30-15 2-15 1- 0 2-15 26- 0 3-21 MEAN QNH PRESSURE IN HPA 1018.5 1015.2 1016.2 1018.1 1017.2 1012.2 1011.3 1013.3 1021.8 1023.3 1019.0 1019.9 1017.2 MAX. QNH PRESSURE IN HPA 1029.8 1024.1 1023.7 1030.0 1023.5 1019.6 1016.5 1019.2 1030.8 1030.3 1028.0 1027.0 1030.8 DAY-HOUR 10- 6 18- 6 18- 6 5- 9 21- 6 8- 6 13- 6 15- 6 23- 6 9- 6 2- 6 7-21 MIN. QNH PRESSURE IN HPA 1006.6 1007.2 1005.3 1008.5 1009.6 1005.4 1006.6 1007.0 1014.1 1016.6 1004.6 1003.5 1003.5 DAY-HOUR 16-12 1- 3 12- 3 2-15 1-12 4-18 30-15 2-15 1- 0 2-15 26- 0 3-21 MEAN QFF PRESSURE IN HPA 1018.9 1015.9 1012.6 1010.9 1007.8 998.8 995.9 998.0 1011.5 1016.6 1015.2 1022.1 1010.4 MAX. QFF PRESSURE IN HPA 1030.8 1026.4 1021.2 1028.8 1015.2 1007.3 1003.8 1004.4 1023.1 1024.9 1022.9 1034.3 1034.3 DAY-HOUR 10- 6 19- 6 18- 3 5- 9 8- 3 9- 6 2- 6 22- 6 23- 3 9- 6 2- 6 8- 3 MIN. QFF PRESSURE IN HPA 1005.8 1004.5 999.2 1002.8 1002.0 992.4 989.1 990.3 999.3 1007.8 1001.8 1000.4 989.1 DAY-HOUR 16-12 1- 3 7-15 26- 0 28-15 4-18 30-15 2-15 1- 0 15-12 26- 0 3-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 845.1 842.3 843.0 844.9 843.9 839.6 838.9 840.6 847.8 849.2 845.5 846.2 843.9 MAX. QFE PRESSURE IN HPA 853.4 848.6 848.4 852.6 847.6 844.4 842.4 844.5 854.1 854.2 851.0 852.4 854.2 DAY 10 19 18 6 19 9 14 23 23 10 2 8 MIN. QFE PRESSURE IN HPA 836.6 836.1 836.2 837.3 838.0 836.0 836.0 836.1 841.5 844.6 833.4 832.8 832.8 DAY 17 12 12 3 1 22 8 2 1 15 26 4 MEAN QNH PRESSURE IN HPA 1018.3 1015.0 1015.7 1018.0 1016.8 1011.9 1011.0 1013.0 1021.4 1023.0 1018.7 1019.5 1016.9 MAX. QNH PRESSURE IN HPA 1027.9 1022.3 1022.1 1027.0 1021.2 1017.4 1015.1 1017.5 1028.7 1028.8 1025.1 1026.7 1028.8 DAY 10 19 18 6 19 9 14 23 23 10 2 8 MIN. QNH PRESSURE IN HPA 1008.4 1007.8 1007.9 1009.2 1010.0 1007.7 1007.7 1007.8 1014.1 1017.7 1004.6 1003.9 1003.9 DAY 17 12 12 3 1 22 8 2 1 15 26 4 MEAN QFF PRESSURE IN HPA 1018.4 1015.4 1012.0 1010.7 1007.4 998.5 995.5 997.4 1010.8 1016.0 1014.6 1021.5 1009.8 MAX. QFF PRESSURE IN HPA 1028.6 1025.9 1020.5 1025.9 1014.2 1004.8 1001.5 1002.6 1020.4 1023.0 1020.2 1034.1 1034.1 DAY 10 19 18 6 8 8 2 23 23 10 10 8 MIN. QFF PRESSURE IN HPA 1009.6 1006.8 1005.5 1002.8 1002.6 993.3 990.3 991.1 999.3 1008.9 1001.8 1001.7 990.3 DAY 5 1 8 26 13 22 31 2 1 15 26 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 845.2 842.3 843.3 845.3 844.4 840.4 839.7 841.3 848.4 849.6 845.8 846.4 844.3 MAX. QFE PRESSURE IN HPA 853.6 848.2 848.8 853.4 848.6 845.4 843.2 844.8 855.5 854.0 851.8 851.8 855.5 DAY 10 18 18 5 21 9 13 16 23 10 2 8 MIN. QFE PRESSURE IN HPA 837.3 835.6 834.0 838.1 838.7 836.3 836.0 836.6 842.3 844.9 834.2 832.8 832.8 DAY 26 1 12 3 1 22 8 2 1 15 26 4 MEAN QNH PRESSURE IN HPA 1018.3 1014.9 1016.2 1018.5 1017.4 1012.8 1011.9 1013.8 1022.1 1023.4 1019.1 1019.8 1017.4 MAX. QNH PRESSURE IN HPA 1028.1 1021.8 1022.5 1027.9 1022.3 1018.6 1016.0 1017.9 1030.3 1028.6 1026.0 1026.0 1030.3 DAY 10 18 18 5 21 9 13 16 23 10 2 8 MIN. QNH PRESSURE IN HPA 1009.2 1007.2 1005.3 1010.1 1010.8 1008.0 1007.7 1008.4 1015.0 1018.0 1005.6 1003.9 1003.9 DAY 26 1 12 3 1 22 8 2 1 15 26 4 MEAN QFF PRESSURE IN HPA 1019.4 1016.3 1013.2 1011.8 1008.6 999.8 996.6 998.8 1012.4 1017.5 1016.2 1022.7 1011.1 MAX. QFF PRESSURE IN HPA 1030.3 1026.0 1021.2 1026.3 1015.2 1007.0 1003.2 1003.7 1023.1 1024.1 1022.4 1034.3 1034.3 DAY 10 19 18 5 8 8 2 16 23 9 10 8 MIN. QFF PRESSURE IN HPA 1009.8 1004.5 1002.5 1003.3 1003.6 993.2 991.3 991.7 1001.1 1009.7 1003.9 1003.1 991.3 DAY 5 1 12 26 29 22 31 2 1 2 26 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 846.3 843.2 844.3 846.0 845.1 841.2 840.4 842.2 849.4 850.5 846.8 847.2 845.2 MAX. QFE PRESSURE IN HPA 855.0 850.1 849.8 855.0 849.6 846.3 843.6 845.9 855.9 855.5 853.5 852.4 855.9 DAY 10 18 18 5 21 8 13 15 23 9 2 8 MIN. QFE PRESSURE IN HPA 838.1 835.7 835.2 838.9 838.7 837.2 836.4 837.8 843.7 846.2 835.5 833.7 833.7 DAY 26 1 12 2 1 22 8 2 1 15 26 4 MEAN QNH PRESSURE IN HPA 1019.6 1016.0 1017.4 1019.3 1018.3 1013.7 1012.7 1014.8 1023.2 1024.5 1020.2 1020.7 1018.4 MAX. QNH PRESSURE IN HPA 1029.8 1024.1 1023.7 1029.8 1023.5 1019.6 1016.5 1019.2 1030.8 1030.3 1028.0 1026.7 1030.8 DAY 10 18 18 5 21 8 13 15 23 9 2 8 MIN. QNH PRESSURE IN HPA 1010.1 1007.3 1006.7 1011.0 1010.8 1009.1 1008.1 1009.7 1016.6 1019.5 1007.1 1005.0 1005.0 DAY 26 1 12 2 1 22 8 2 1 15 26 4 MEAN QFF PRESSURE IN HPA 1020.2 1016.8 1013.9 1012.1 1008.8 1000.3 997.6 999.6 1012.9 1017.7 1016.4 1022.9 1011.6 MAX. QFF PRESSURE IN HPA 1030.8 1026.4 1021.2 1028.8 1015.0 1007.3 1003.8 1004.4 1022.5 1024.9 1022.9 1033.7 1033.7 DAY 10 19 18 5 18 9 2 22 23 9 2 8 MIN. QFF PRESSURE IN HPA 1010.9 1005.9 1003.9 1004.6 1003.8 994.7 991.8 993.5 1002.4 1010.7 1004.8 1004.1 991.8 DAY 16 1 12 2 29 22 8 2 1 15 26 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 845.6 842.7 843.9 845.4 844.7 840.6 839.9 841.6 848.6 849.7 846.0 846.6 844.6 MAX. QFE PRESSURE IN HPA 854.1 849.2 849.2 855.2 849.1 846.3 843.4 845.3 855.3 855.0 852.5 851.2 855.3 DAY 10 18 18 5 21 8 13 15 23 10 2 8 MIN. QFE PRESSURE IN HPA 836.9 836.3 835.4 837.9 838.3 836.6 836.4 837.2 843.3 845.0 836.4 833.2 833.2 DAY 16 12 12 2 1 29 8 2 1 15 26 4 MEAN QNH PRESSURE IN HPA 1018.8 1015.5 1016.9 1018.6 1017.7 1013.0 1012.2 1014.2 1022.4 1023.6 1019.3 1020.0 1017.7 MAX. QNH PRESSURE IN HPA 1028.7 1023.0 1023.0 1030.0 1022.9 1019.6 1016.3 1018.5 1030.1 1029.8 1026.9 1025.3 1030.1 DAY 10 18 18 5 21 8 13 15 23 10 2 8 MIN. QNH PRESSURE IN HPA 1008.7 1008.0 1007.0 1009.9 1010.3 1008.4 1008.1 1009.1 1016.1 1018.1 1008.1 1004.4 1004.4 DAY 16 12 12 2 1 29 8 2 1 15 26 4 MEAN QFF PRESSURE IN HPA 1018.7 1016.0 1013.0 1011.1 1008.2 999.5 996.7 998.7 1011.9 1016.5 1015.0 1021.8 1010.6 MAX. QFF PRESSURE IN HPA 1028.9 1025.5 1020.7 1028.8 1014.0 1007.1 1002.7 1003.6 1021.4 1023.9 1021.1 1032.4 1032.4 DAY 10 18 17 5 7 8 2 22 23 9 10 7 MIN. QFF PRESSURE IN HPA 1009.2 1008.0 1003.5 1003.6 1003.0 993.5 991.7 992.2 1002.2 1009.2 1004.7 1003.4 991.7 DAY 16 9 12 2 28 22 8 2 1 15 26 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 844.7 841.7 842.7 844.3 843.7 839.5 838.6 840.3 847.4 848.7 845.2 845.9 843.5 MAX. QFE PRESSURE IN HPA 853.0 848.2 847.7 853.2 847.6 844.6 842.0 843.9 854.1 853.9 851.4 850.2 854.1 DAY 10 18 18 5 21 8 13 15 23 9 2 7 MIN. QFE PRESSURE IN HPA 835.1 835.7 834.6 837.3 837.7 836.3 835.6 836.6 841.8 843.8 837.4 833.6 833.6 DAY 16 12 7 2 1 22 30 2 1 15 26 4 MEAN QNH PRESSURE IN HPA 1017.7 1014.3 1015.4 1017.3 1016.6 1011.7 1010.7 1012.7 1020.9 1022.5 1018.4 1019.1 1016.4 MAX. QNH PRESSURE IN HPA 1027.4 1021.8 1021.3 1027.7 1021.2 1017.7 1014.6 1016.8 1028.7 1028.5 1025.6 1024.2 1028.7 DAY 10 18 18 5 21 8 13 15 23 9 2 7 MIN. QNH PRESSURE IN HPA 1006.6 1007.3 1006.0 1009.2 1009.6 1008.0 1007.2 1008.4 1014.4 1016.7 1009.3 1004.9 1004.9 DAY 16 12 7 2 1 22 30 2 1 15 26 4 MEAN QFF PRESSURE IN HPA 1017.8 1014.8 1011.6 1010.0 1007.1 998.3 995.1 997.1 1010.4 1015.5 1014.3 1021.1 1009.4 MAX. QFF PRESSURE IN HPA 1028.9 1024.5 1018.6 1026.0 1014.1 1005.0 1000.8 1001.1 1020.4 1022.5 1020.2 1031.6 1031.6 DAY 10 18 17 5 7 8 2 22 23 9 10 7 MIN. QFF PRESSURE IN HPA 1005.8 1005.8 1000.4 1002.9 1002.0 993.0 990.4 991.7 1000.1 1007.8 1005.9 1004.5 990.4 DAY 16 1 7 26 29 22 30 3 1 15 26 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 845.2 842.1 842.7 844.1 843.4 839.0 838.1 839.8 847.3 849.0 845.5 846.3 843.5 MAX. QFE PRESSURE IN HPA 853.2 848.6 847.7 853.0 847.5 843.8 841.8 843.2 853.9 854.7 851.4 851.6 854.7 DAY 9 18 18 5 21 8 13 15 23 9 2 7 MIN. QFE PRESSURE IN HPA 836.0 836.3 834.1 836.7 837.7 834.7 835.1 835.4 842.1 843.7 839.3 833.7 833.7 DAY 16 12 7 2 1 4 30 2 1 2 25 4 MEAN QNH PRESSURE IN HPA 1018.4 1014.8 1015.5 1017.1 1016.3 1011.1 1010.1 1012.1 1020.8 1022.8 1018.7 1019.7 1016.4 MAX. QNH PRESSURE IN HPA 1027.7 1022.3 1021.3 1027.4 1021.0 1016.7 1014.4 1016.0 1028.5 1029.4 1025.6 1025.8 1029.4 DAY 9 18 18 5 21 8 13 15 23 9 2 7 MIN. QNH PRESSURE IN HPA 1007.7 1008.0 1005.4 1008.5 1009.6 1006.1 1006.6 1007.0 1014.8 1016.6 1011.5 1005.0 1005.0 DAY 16 12 7 2 1 4 30 2 1 2 25 4 MEAN QFF PRESSURE IN HPA 1019.3 1016.0 1012.4 1010.4 1007.3 998.0 994.6 996.9 1011.2 1016.8 1015.7 1022.6 1010.1 MAX. QFF PRESSURE IN HPA 1029.9 1025.3 1019.7 1026.9 1014.0 1005.1 1000.4 1001.1 1021.1 1024.7 1021.5 1034.3 1034.3 DAY 9 18 3 5 18 7 13 15 22 9 2 7 MIN. QFF PRESSURE IN HPA 1008.7 1008.8 999.2 1003.0 1002.0 993.1 989.1 990.3 1001.6 1008.1 1008.1 1003.7 989.1 DAY 16 12 7 26 28 4 30 2 1 2 25 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 845.6 842.9 843.5 844.9 844.3 839.4 838.7 840.6 848.1 849.6 845.8 847.0 844.2 MAX. QFE PRESSURE IN HPA 853.6 848.9 848.4 853.6 848.0 844.8 842.8 844.7 854.5 855.0 851.6 852.4 855.0 DAY 9 18 18 5 20 8 13 15 22 9 2 7 MIN. QFE PRESSURE IN HPA 836.5 836.9 835.0 837.5 838.4 834.1 836.0 836.2 842.8 844.6 837.7 834.0 834.0 DAY 16 12 12 2 1 4 7 2 1 14 25 3 MEAN QNH PRESSURE IN HPA 1018.8 1015.6 1016.4 1018.0 1017.4 1011.6 1010.8 1013.0 1021.7 1023.5 1019.0 1020.5 1017.2 MAX. QNH PRESSURE IN HPA 1028.1 1022.7 1022.1 1028.1 1021.6 1017.9 1015.6 1017.8 1029.2 1029.8 1025.8 1026.7 1029.8 DAY 9 18 18 5 20 8 13 15 22 9 2 7 MIN. QNH PRESSURE IN HPA 1008.2 1008.7 1006.5 1009.4 1010.4 1005.4 1007.7 1007.9 1015.6 1017.7 1009.6 1005.3 1005.3 DAY 16 12 12 2 1 4 7 2 1 14 25 3 MEAN QFF PRESSURE IN HPA 1019.3 1016.3 1012.8 1010.6 1007.7 998.2 995.5 997.6 1011.4 1016.7 1015.2 1022.7 1010.3 MAX. QFF PRESSURE IN HPA 1028.8 1025.4 1020.6 1027.9 1015.1 1005.4 1001.8 1002.3 1021.0 1024.7 1020.6 1034.0 1034.0 DAY 9 19 3 5 7 8 13 15 22 9 1 7 MIN. QFF PRESSURE IN HPA 1009.5 1010.0 1003.6 1003.4 1002.5 992.4 990.4 991.4 1001.8 1009.1 1007.0 1003.0 990.4 DAY 16 8 7 26 28 4 30 1 1 14 25 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 845.4 842.8 843.5 845.0 844.3 839.4 838.9 840.9 848.2 849.6 845.6 846.6 844.2 MAX. QFE PRESSURE IN HPA 853.6 848.9 848.4 853.2 848.0 845.0 842.8 844.7 854.7 854.2 851.6 852.6 854.7 DAY 9 18 18 5 20 8 13 15 22 9 2 7 MIN. QFE PRESSURE IN HPA 836.5 836.5 836.0 837.7 838.4 834.9 836.0 836.6 842.8 844.6 835.4 832.4 832.4 DAY 16 11 12 2 1 4 7 1 1 14 25 3 MEAN QNH PRESSURE IN HPA 1018.6 1015.6 1016.3 1018.1 1017.3 1011.6 1011.1 1013.4 1021.8 1023.4 1018.8 1020.0 1017.2 MAX. QNH PRESSURE IN HPA 1028.1 1022.7 1022.1 1027.7 1021.6 1018.1 1015.6 1017.8 1029.4 1028.8 1025.8 1027.0 1029.4 DAY 9 18 18 5 20 8 13 15 22 9 2 7 MIN. QNH PRESSURE IN HPA 1008.2 1008.2 1007.7 1009.6 1010.4 1006.4 1007.7 1008.4 1015.6 1017.7 1007.0 1003.5 1003.5 DAY 16 11 12 2 1 4 7 1 1 14 25 3 MEAN QFF PRESSURE IN HPA 1018.5 1016.0 1012.4 1010.6 1007.5 998.2 995.5 997.9 1011.4 1016.4 1014.5 1021.9 1010.1 MAX. QFF PRESSURE IN HPA 1028.2 1025.7 1019.5 1027.1 1014.0 1005.0 1001.7 1002.6 1020.9 1023.4 1020.2 1033.9 1033.9 DAY 9 18 17 5 7 8 13 15 22 9 9 7 MIN. QFF PRESSURE IN HPA 1010.1 1007.9 1003.7 1003.5 1002.8 993.5 990.1 991.5 1001.8 1008.9 1003.8 1000.4 990.1 DAY 16 8 11 25 28 28 30 1 1 14 25 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.5 5.5 9.5 14.3 18.7 24.1 29.9 29.3 22.5 15.1 10.4 1.7 15.5 MINIMUN AIR TEMPERATURE (C) 0.6 1.9 4.8 9.6 13.7 18.4 24.1 23.5 17.0 9.9 5.7 -1.6 10.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 3 28 31 2 0 0 0 64 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 5 5 DAYS WITH FREEZING MIN.<= 0 12 4 1 0 0 0 0 0 0 0 5 28 50 TEMPERATURE RECORDS LOWEST(C) -3.0 -2.0 0.0 5.0 7.0 13.0 18.6 21.4 9.6 2.6 -3.4 -4.6 -4.6 DAY 23 26 7 7 9 1 1 10 22 27 26 15 MAXIMUM AIR TEMPERATURE (C) 9.4 9.9 14.5 19.2 23.7 29.6 35.8 35.4 28.6 20.9 16.1 5.8 20.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 17 31 31 15 0 0 0 94 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 2 2 TEMPERATURE RECORDS HIGHEST(C) 15.0 15.0 19.8 25.0 28.2 33.2 39.6 38.2 33.0 28.2 21.6 10.8 39.6 DAY 31 4 24 30 22 29 16 6 9 4 1 2 DIF. BETWEEN (MAX.-MIN.) (C) 8.8 8.0 9.7 9.6 10.0 11.2 11.7 11.9 11.6 11.0 10.4 7.4 10.2 MEAN DAILY TEMP. (MDT) (C) 5.0 5.9 9.6 14.4 18.7 24.0 30.0 29.5 22.8 15.4 10.9 2.1 15.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 8.5 94.4 277.5 262.9 75.1 1.5 0.0 0.0 720.0 HEATING DEG. DAYS(BASE 18 0C) 403.2 338.7 259.0 108.6 26.4 0.0 0.0 0.0 3.0 97.2 213.5 493.2 1942.8 DEWPOINT (MEAN C) -3.5 -2.3 -2.1 3.2 5.8 6.9 9.6 7.1 5.6 2.4 -4.2 -4.8 2.0 MIXING RATIO (G/KG) 3.59 3.90 4.08 5.90 7.03 7.60 9.20 7.64 6.86 5.51 3.56 3.24 5.67 VAPOUR PRESSURE (HPA) 4.85 5.26 5.49 7.92 9.45 10.15 12.22 10.21 9.20 7.44 4.81 4.39 7.62 SATURATION DEF. (HPA) 3.78 4.02 6.80 8.82 12.66 20.72 31.08 31.53 19.07 10.48 8.60 2.69 13.35 RELATIVE HUMIDITY (MEAN %) 58 60 47 50 46 35 30 26 36 45 38 64 45 RELATIVE HUMIDITY (MAX. %) 76 78 64 70 65 51 41 38 49 59 53 78 60 RELATIVE HUMIDITY (MIN. %) 41 45 34 33 31 24 22 17 24 30 23 50 31 RELATIVE HUMIDITY (MEAN% 03UTC) 66 67 58 64 56 48 38 34 45 56 47 71 54 RELATIVE HUMIDITY (MEAN% 09UTC) 46 53 38 41 37 29 25 20 27 33 26 55 36 RELATIVE HUMIDITY (MEAN% 15UTC) 56 57 42 42 42 28 24 22 32 43 38 64 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 11.7 37.4 43.6 42.0 53.1 6.1 0.0 0.0 2.4 8.6 0.2 28.0 233.1 DAYS WITH PRECIPITATION >=10 0 0 2 2 2 0 0 0 0 0 0 1 7 DAYS WITH PRECIPITATION >= 5 1 4 2 2 4 0 0 0 0 1 0 3 17 DAYS WITH PRECIPITATION >= 1 3 8 6 8 11 2 0 0 1 2 0 6 47 DAYS WITH PRECIPITATION 6 12 8 11 13 6 1 0 2 3 2 6 70 GREATEST DAILY PRECIPITATION 7.0 9.0 16.0 14.0 13.0 2.4 0.0 0.0 2.0 6.6 0.2 12.1 16.0 DAY 16 16 17 24 15 5 ** ** 21 25 10 12 DAY WITH THUNDER STORM 0 0 0 2 5 2 0 0 2 0 0 0 11 DAYS WITH SNOW OR SLEET 0 5 0 0 0 0 0 0 0 0 0 7 12 DAYS WITH DUST 1 0 0 0 0 0 0 0 1 0 0 1 3 WIND DIRECTION (PREVAILING) 225 45 270 180 225 225 180 225 180 45 45 45 225 PREVAILING WIND SPEED(KNOTS) 5.3 5.1 7.5 7.2 6.3 6.3 5.6 6.5 5.8 4.2 4.7 4.4 6.3 PREVAILING WIND PERCENT 6.0 6.7 9.7 7.1 10.5 7.9 6.0 12.1 10.4 10.9 10.0 7.3 7.8 CALMS PERCENT OF WIND 80.2 73.7 66.9 75.4 62.1 70.0 71.4 51.6 58.3 56.5 57.9 73.8 66.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 190 211 254 218 276 236 235 223 218 222 259 168 233 VECTOR WIND MAGNITUDE(KNOTS) 0.4 0.4 1.0 0.7 0.6 0.7 0.3 0.7 0.7 0.3 0.6 0.1 0.5 WIND STEADINESES (MEAN %) 40.0 25.0 43.5 43.8 24.0 35.0 20.0 25.9 29.2 13.6 25.0 8.3 25.0 WIND SPEED (MEAN KNOTS) 1.0 1.6 2.3 1.6 2.5 2.0 1.5 2.7 2.4 2.2 2.4 1.2 2.0 FASTEST WIND DIRECTION 180 220 210 290 360 180 170 230 300 270 290 210 290 FASTEST WIND SPEED (KNOTS) 12 17 29 35 19 21 10 14 23 12 19 14 35 DAY 22 8 26 6 21 15 1 22 15 6 11 7 DAYS WITH SKY CLEAR (0-2)/8 22 12 17 6 10 23 26 28 27 24 22 13 230 DAYS WITH P.CLOUDY (3-6)/8 5 7 8 15 13 6 5 3 3 3 8 11 87 DAYS WITH CLOUDY (7-8)/8 4 9 6 9 8 1 0 0 0 4 0 7 48 DAYS WITH VISIBILITY =< 2 KM 2 0 0 0 2 1 0 0 0 0 0 7 12 DURATION OF SUNSHINE HOURS 203.9 158.4 231.1 189.8 241.2 326.1 348.0 357.9 308.2 264.8 225.7 138.1 2993.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 846.6 844.4 843.8 843.2 845.9 841.5 838.7 842.0 844.4 848.1 846.9 847.9 844.4 MAX. QFE PRESSURE IN HPA 854.6 850.0 852.4 847.7 851.8 848.0 843.6 847.4 851.3 856.4 854.3 853.0 856.4 DAY-HOUR 7- 6 12- 6 3- 6 7- 6 26- 6 1- 6 31- 6 25- 6 13- 6 25- 6 16- 6 10-18 MIN. QFE PRESSURE IN HPA 840.4 835.5 834.9 837.7 841.7 835.4 833.8 837.5 839.0 840.4 836.4 843.0 833.8 DAY-HOUR 1-12 5-12 26- 0 17-12 5-15 22-12 16-15 22-15 19- 3 12-15 25-21 4- 3 MEAN QNH PRESSURE IN HPA 1020.0 1017.4 1016.7 1016.0 1019.1 1014.1 1010.8 1014.7 1017.4 1021.7 1020.3 1021.4 1017.5 MAX. QNH PRESSURE IN HPA 1029.3 1023.9 1026.7 1021.3 1026.0 1021.6 1016.5 1020.9 1025.5 1031.4 1028.9 1027.4 1031.4 DAY-HOUR 7- 6 12- 6 3- 6 7- 6 26- 6 1- 6 31- 6 25- 6 13- 6 25- 6 16- 6 10-18 MIN. QNH PRESSURE IN HPA 1012.8 1007.1 1006.4 1009.6 1014.3 1007.0 1005.1 1009.4 1011.1 1012.8 1008.1 1015.8 1005.1 DAY-HOUR 1-12 5-12 26- 0 17-12 5-15 22-12 16-15 22-15 19- 3 12-15 25-21 4- 3 MEAN QFF PRESSURE IN HPA 1020.2 1016.8 1013.5 1009.5 1009.9 1001.5 994.7 999.1 1005.9 1015.0 1016.6 1023.7 1010.5 MAX. QFF PRESSURE IN HPA 1029.5 1024.0 1025.1 1017.9 1019.1 1013.6 1001.7 1006.2 1017.3 1027.4 1027.5 1030.5 1030.5 DAY-HOUR 7- 6 17-18 3- 6 7- 6 26- 9 1- 6 4- 6 25- 3 22- 3 26- 3 28- 3 10-18 MIN. QFF PRESSURE IN HPA 1012.6 1002.7 999.8 1002.9 1003.7 992.3 987.1 993.1 998.6 1003.3 1004.6 1017.0 987.1 DAY-HOUR 11-12 5-12 26- 0 16-12 7- 0 22-12 16-12 22-21 19- 0 12-12 11-12 4-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 846.3 844.3 843.5 843.1 845.7 841.5 838.3 841.7 844.4 847.9 846.7 847.8 844.3 MAX. QFE PRESSURE IN HPA 852.9 849.9 851.0 847.0 849.0 846.1 841.3 845.5 849.3 855.4 853.6 851.9 855.4 DAY 7 14 4 1 29 2 24 25 13 26 16 11 MIN. QFE PRESSURE IN HPA 841.3 838.3 834.9 838.7 841.8 837.1 834.6 838.1 839.3 841.4 836.4 844.4 834.6 DAY 12 5 26 18 10 22 17 23 19 13 26 4 MEAN QNH PRESSURE IN HPA 1019.7 1017.3 1016.3 1015.9 1018.9 1014.0 1010.3 1014.3 1017.4 1021.5 1020.1 1021.3 1017.3 MAX. QNH PRESSURE IN HPA 1027.3 1023.8 1025.1 1020.5 1022.8 1019.4 1013.8 1018.7 1023.1 1030.2 1028.1 1026.2 1030.2 DAY 7 14 4 1 29 2 24 25 13 26 16 11 MIN. QNH PRESSURE IN HPA 1013.8 1010.3 1006.4 1010.8 1014.4 1008.9 1006.0 1010.1 1011.5 1013.9 1008.1 1017.4 1006.0 DAY 12 5 26 18 10 22 17 23 19 13 26 4 MEAN QFF PRESSURE IN HPA 1019.6 1016.3 1012.8 1009.4 1009.6 1001.4 994.1 998.6 1005.4 1014.3 1015.8 1023.2 1010.0 MAX. QFF PRESSURE IN HPA 1027.2 1022.9 1023.0 1015.6 1015.0 1011.4 998.8 1003.7 1014.4 1027.1 1025.9 1029.3 1029.3 DAY 7 26 4 7 29 1 26 25 22 26 28 11 MIN. QFF PRESSURE IN HPA 1013.1 1005.3 999.8 1003.8 1003.7 994.3 987.6 993.7 998.6 1005.0 1007.1 1017.1 987.6 DAY 12 5 26 18 7 22 17 23 19 13 26 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 846.6 844.5 843.8 843.5 845.9 842.1 839.2 842.5 844.8 848.2 846.9 847.9 844.6 MAX. QFE PRESSURE IN HPA 853.5 849.2 851.3 847.2 849.9 846.8 842.6 846.7 850.0 855.8 853.6 851.9 855.8 DAY 7 13 3 1 26 1 4 25 13 27 16 11 MIN. QFE PRESSURE IN HPA 841.3 838.3 835.7 838.9 841.8 837.2 835.9 838.2 839.0 841.6 838.0 843.0 835.7 DAY 12 5 26 25 10 22 17 23 19 12 26 4 MEAN QNH PRESSURE IN HPA 1020.0 1017.6 1016.7 1016.3 1019.2 1014.7 1011.3 1015.2 1017.9 1021.9 1020.3 1021.5 1017.7 MAX. QNH PRESSURE IN HPA 1028.0 1023.0 1025.5 1020.7 1023.8 1020.2 1015.3 1020.1 1023.9 1030.7 1028.1 1026.2 1030.7 DAY 7 13 3 1 26 1 4 25 13 27 16 11 MIN. QNH PRESSURE IN HPA 1013.8 1010.3 1007.3 1011.0 1014.4 1009.1 1007.5 1010.2 1011.1 1014.2 1010.0 1015.8 1007.3 DAY 12 5 26 25 10 22 17 23 19 12 26 4 MEAN QFF PRESSURE IN HPA 1021.0 1017.5 1014.2 1010.3 1010.4 1002.5 995.5 1000.0 1007.1 1016.1 1017.7 1024.5 1011.4 MAX. QFF PRESSURE IN HPA 1029.4 1023.6 1024.3 1017.2 1015.3 1013.5 1000.8 1006.2 1017.3 1027.4 1027.5 1029.6 1029.6 DAY 7 13 3 7 27 1 4 25 22 26 28 11 MIN. QFF PRESSURE IN HPA 1013.4 1007.5 1001.1 1004.3 1005.6 994.2 989.1 994.1 1000.3 1005.4 1010.0 1017.1 989.1 DAY 12 5 26 19 6 22 17 23 19 12 11 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 847.8 845.3 844.8 844.2 846.7 842.7 839.9 843.3 845.6 849.2 847.9 848.7 845.5 MAX. QFE PRESSURE IN HPA 854.6 850.0 852.4 847.7 851.8 848.0 843.6 847.4 851.3 856.4 854.3 852.9 856.4 DAY 7 12 3 7 26 1 31 25 13 25 16 10 MIN. QFE PRESSURE IN HPA 843.1 837.5 836.0 839.4 843.4 837.1 836.5 839.7 840.0 843.2 839.4 844.8 836.0 DAY 12 5 26 25 10 22 16 23 19 12 26 4 MEAN QNH PRESSURE IN HPA 1021.3 1018.5 1017.9 1017.1 1020.1 1015.5 1012.2 1016.1 1018.8 1023.0 1021.5 1022.5 1018.7 MAX. QNH PRESSURE IN HPA 1029.3 1023.9 1026.7 1021.3 1026.0 1021.6 1016.5 1020.9 1025.5 1031.4 1028.9 1027.3 1031.4 DAY 7 12 3 7 26 1 31 25 13 25 16 10 MIN. QNH PRESSURE IN HPA 1015.9 1009.4 1007.7 1011.6 1016.3 1008.9 1008.2 1012.0 1012.3 1016.0 1011.6 1017.9 1007.7 DAY 12 5 26 25 10 22 16 23 19 12 26 4 MEAN QFF PRESSURE IN HPA 1021.8 1018.0 1014.8 1010.6 1010.7 1003.0 996.2 1000.6 1007.2 1016.1 1017.5 1024.6 1011.8 MAX. QFF PRESSURE IN HPA 1029.5 1023.7 1025.1 1017.9 1017.4 1013.6 1001.7 1006.2 1017.0 1027.1 1027.5 1030.0 1030.0 DAY 7 17 3 7 26 1 4 25 22 25 28 10 MIN. QFF PRESSURE IN HPA 1015.0 1007.3 1001.6 1004.5 1005.9 994.1 990.5 995.8 1000.0 1006.6 1009.3 1018.9 990.5 DAY 17 5 26 19 6 22 16 23 19 5 11 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 846.8 844.8 844.3 843.5 846.2 842.2 839.5 842.8 844.9 848.4 846.9 848.0 844.9 MAX. QFE PRESSURE IN HPA 853.5 849.7 851.8 847.6 851.8 847.6 843.2 846.8 850.4 856.0 852.9 852.6 856.0 DAY 7 12 3 12 26 1 31 25 13 25 16 10 MIN. QFE PRESSURE IN HPA 841.9 836.9 836.4 839.6 843.0 836.7 835.8 839.6 839.4 842.6 839.4 844.1 835.8 DAY 1 5 26 24 7 22 16 23 20 12 26 4 MEAN QNH PRESSURE IN HPA 1020.3 1017.9 1017.3 1016.4 1019.5 1014.9 1011.7 1015.5 1018.1 1022.1 1020.3 1021.6 1018.0 MAX. QNH PRESSURE IN HPA 1028.0 1023.6 1026.0 1021.2 1026.0 1021.2 1016.0 1020.2 1024.4 1030.9 1027.3 1027.0 1030.9 DAY 7 12 3 12 26 1 31 25 13 25 16 10 MIN. QNH PRESSURE IN HPA 1014.5 1008.7 1008.1 1011.8 1015.8 1008.5 1007.4 1011.8 1011.6 1015.3 1011.6 1017.1 1007.4 DAY 1 5 26 24 7 22 16 23 20 12 26 4 MEAN QFF PRESSURE IN HPA 1020.1 1017.0 1013.7 1009.7 1010.1 1002.2 995.5 999.9 1006.2 1015.0 1016.1 1023.4 1010.7 MAX. QFF PRESSURE IN HPA 1028.1 1023.9 1024.4 1017.5 1019.1 1012.0 1000.6 1005.2 1015.4 1026.3 1025.0 1029.5 1029.5 DAY 7 17 3 7 26 1 4 25 22 25 28 10 MIN. QFF PRESSURE IN HPA 1014.2 1005.5 1002.6 1004.0 1005.1 994.0 989.2 995.2 1000.2 1005.6 1006.5 1018.1 989.2 DAY 11 5 26 18 6 22 16 6 20 12 11 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 845.8 843.5 843.0 842.4 845.3 841.1 838.4 841.5 843.6 847.3 846.1 847.0 843.7 MAX. QFE PRESSURE IN HPA 852.6 848.5 850.6 846.5 850.3 846.6 842.0 844.7 848.7 855.3 851.8 851.7 855.3 DAY 7 1 3 12 26 1 31 25 13 25 16 10 MIN. QFE PRESSURE IN HPA 840.4 835.5 835.4 837.7 841.8 835.4 834.2 838.6 839.6 840.6 838.0 843.1 834.2 DAY 1 5 26 17 10 22 16 23 20 12 25 25 MEAN QNH PRESSURE IN HPA 1019.0 1016.4 1015.9 1015.1 1018.4 1013.5 1010.4 1014.0 1016.6 1020.8 1019.4 1020.4 1016.7 MAX. QNH PRESSURE IN HPA 1027.0 1022.2 1024.6 1019.9 1024.3 1020.0 1014.6 1017.8 1022.4 1030.1 1026.0 1025.9 1030.1 DAY 7 1 3 12 26 1 31 25 13 25 16 10 MIN. QNH PRESSURE IN HPA 1012.8 1007.1 1007.0 1009.6 1014.4 1007.0 1005.6 1010.7 1011.8 1013.0 1010.0 1015.9 1005.6 DAY 1 5 26 17 10 22 16 23 20 12 25 25 MEAN QFF PRESSURE IN HPA 1018.8 1015.4 1012.3 1008.4 1009.1 1000.8 994.1 998.3 1004.6 1013.6 1015.3 1022.2 1009.4 MAX. QFF PRESSURE IN HPA 1027.7 1023.7 1022.3 1014.6 1016.4 1010.9 998.1 1002.5 1013.2 1025.1 1025.4 1028.4 1028.4 DAY 7 17 3 7 29 1 31 10 22 25 30 10 MIN. QFF PRESSURE IN HPA 1012.6 1002.7 1002.2 1002.9 1004.4 992.3 987.1 994.7 1000.1 1003.3 1004.6 1017.0 987.1 DAY 11 5 26 16 6 22 16 8 19 12 11 4 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 846.2 843.8 843.2 842.4 845.2 840.5 837.7 841.0 843.4 847.5 846.6 847.5 843.7 MAX. QFE PRESSURE IN HPA 853.1 848.9 850.8 846.7 849.5 845.6 840.9 844.1 848.3 855.4 852.3 852.1 855.4 DAY 7 1 3 12 26 1 31 25 13 25 15 10 MIN. QFE PRESSURE IN HPA 840.6 835.7 835.9 838.0 841.7 835.4 833.8 837.5 839.2 840.4 838.0 843.7 833.8 DAY 1 5 26 17 5 22 16 22 20 12 25 25 MEAN QNH PRESSURE IN HPA 1019.5 1016.7 1016.0 1015.1 1018.4 1012.9 1009.6 1013.5 1016.3 1021.0 1020.0 1021.1 1016.7 MAX. QNH PRESSURE IN HPA 1027.6 1022.7 1024.9 1020.1 1023.4 1018.8 1013.4 1017.1 1022.0 1030.2 1026.6 1026.4 1030.2 DAY 7 1 3 12 26 1 31 25 13 25 15 10 MIN. QNH PRESSURE IN HPA 1013.0 1007.3 1007.5 1010.0 1014.3 1007.0 1005.1 1009.4 1011.4 1012.8 1010.0 1016.6 1005.1 DAY 1 5 26 17 5 22 16 22 20 12 25 25 MEAN QFF PRESSURE IN HPA 1020.4 1016.6 1013.3 1009.0 1009.7 1000.5 993.7 998.2 1005.5 1015.2 1017.5 1024.1 1010.3 MAX. QFF PRESSURE IN HPA 1029.1 1022.9 1024.1 1014.9 1015.4 1009.5 997.8 1002.8 1013.6 1026.9 1026.8 1029.5 1029.5 DAY 7 17 3 7 29 1 31 24 22 26 30 10 MIN. QFF PRESSURE IN HPA 1013.0 1004.7 1001.6 1004.2 1004.4 992.9 987.1 993.4 1000.5 1003.4 1006.5 1019.2 987.1 DAY 11 5 25 17 5 22 16 22 18 12 11 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 846.9 844.6 844.0 843.2 845.9 841.3 838.4 841.7 844.3 848.1 847.2 848.1 844.5 MAX. QFE PRESSURE IN HPA 853.6 849.3 850.8 847.2 850.6 847.1 841.6 845.5 848.8 855.6 853.8 853.0 855.6 DAY 6 1 3 30 26 1 28 24 12 25 15 10 MIN. QFE PRESSURE IN HPA 841.7 837.1 836.7 838.7 841.9 836.4 834.4 837.9 839.9 841.0 837.0 844.5 834.4 DAY 11 5 26 17 9 30 16 22 19 12 25 25 MEAN QNH PRESSURE IN HPA 1020.3 1017.6 1016.9 1016.0 1019.2 1013.8 1010.4 1014.3 1017.3 1021.8 1020.6 1021.7 1017.5 MAX. QNH PRESSURE IN HPA 1028.1 1023.1 1024.9 1020.7 1024.6 1020.6 1014.2 1018.7 1022.5 1030.5 1028.4 1027.4 1030.5 DAY 6 1 3 30 26 1 28 24 12 25 15 10 MIN. QNH PRESSURE IN HPA 1014.3 1008.9 1008.5 1010.8 1014.5 1008.1 1005.8 1009.9 1012.2 1013.5 1008.8 1017.5 1005.8 DAY 11 5 26 17 9 30 16 22 19 12 25 25 MEAN QFF PRESSURE IN HPA 1020.6 1017.2 1013.7 1009.4 1009.8 1001.2 994.4 998.8 1005.8 1014.9 1016.9 1023.8 1010.5 MAX. QFF PRESSURE IN HPA 1028.7 1024.0 1023.2 1015.3 1017.6 1010.8 999.0 1004.0 1013.5 1027.4 1027.0 1030.5 1030.5 DAY 6 17 3 6 26 1 25 24 22 25 27 10 MIN. QFF PRESSURE IN HPA 1013.8 1006.7 1002.3 1003.7 1003.9 994.0 987.8 993.5 999.9 1004.8 1005.7 1019.8 987.8 DAY 16 5 25 16 5 22 16 22 18 4 25 25 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 846.8 844.5 843.9 843.2 846.1 841.2 838.5 841.8 844.4 848.2 847.1 848.1 844.5 MAX. QFE PRESSURE IN HPA 853.1 849.5 850.7 847.0 850.1 846.4 842.1 845.5 849.3 855.4 854.0 852.6 855.4 DAY 6 1 2 12 25 1 31 24 12 26 15 10 MIN. QFE PRESSURE IN HPA 841.7 838.5 835.8 838.7 841.8 836.4 834.6 837.9 839.9 841.4 836.4 845.0 834.6 DAY 11 5 26 17 9 30 16 22 19 12 25 15 MEAN QNH PRESSURE IN HPA 1020.2 1017.5 1016.9 1016.1 1019.4 1013.7 1010.6 1014.4 1017.4 1021.8 1020.5 1021.7 1017.5 MAX. QNH PRESSURE IN HPA 1027.6 1023.4 1024.8 1020.5 1024.1 1019.8 1014.8 1018.7 1023.1 1030.2 1028.6 1027.0 1030.2 DAY 6 1 2 12 25 1 31 24 12 26 15 10 MIN. QNH PRESSURE IN HPA 1014.3 1010.6 1007.4 1010.8 1014.4 1008.1 1006.0 1009.9 1012.2 1013.9 1008.1 1018.1 1006.0 DAY 11 5 26 17 9 30 16 22 19 12 25 15 MEAN QFF PRESSURE IN HPA 1020.0 1016.7 1013.2 1009.3 1009.9 1001.0 994.4 998.7 1005.6 1014.6 1016.4 1023.5 1010.3 MAX. QFF PRESSURE IN HPA 1027.3 1023.5 1022.8 1014.8 1017.4 1009.3 999.8 1003.7 1014.9 1027.1 1026.6 1030.3 1030.3 DAY 6 17 2 6 26 1 3 24 21 25 27 10 MIN. QFF PRESSURE IN HPA 1012.7 1007.0 1001.0 1003.3 1004.5 994.2 987.9 993.1 1000.1 1004.8 1005.2 1019.3 987.9 DAY 16 4 25 17 5 30 16 22 18 12 25 3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.4 4.5 5.2 12.9 19.9 25.3 27.0 27.2 24.2 15.3 8.3 5.9 14.7 MINIMUN AIR TEMPERATURE (C) -2.8 1.5 1.9 8.4 14.4 19.9 21.6 21.0 18.5 10.2 4.2 2.1 10.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 11 19 14 3 0 0 0 47 DAYS WITH MINIMUM TEMP. <=-4 13 1 0 0 0 0 0 0 0 0 0 0 14 DAYS WITH FREEZING MIN.<= 0 23 8 8 0 0 0 0 0 0 0 5 8 52 TEMPERATURE RECORDS LOWEST(C) -8.0 -4.4 -3.0 1.6 10.6 16.2 17.4 17.6 14.4 4.6 -1.4 -1.6 -8.0 DAY 20 6 1 5 2 8 16 31 21 17 14 3 MAXIMUM AIR TEMPERATURE (C) 4.4 8.4 9.0 17.7 25.3 30.8 32.2 32.7 30.3 21.1 13.5 10.9 19.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 18 29 28 20 0 0 0 97 DAYS WITH MAXIMUM TEMP. <= 0 5 1 0 0 0 0 0 0 0 0 0 0 6 TEMPERATURE RECORDS HIGHEST(C) 10.6 15.4 19.4 23.6 31.6 34.4 36.0 35.6 33.4 25.0 19.2 16.6 36.0 DAY 2 10 30 21 31 4 19 22 11 1 3 27 DIF. BETWEEN (MAX.-MIN.) (C) 7.2 6.9 7.1 9.3 10.9 10.9 10.6 11.7 11.8 10.9 9.3 8.8 9.6 MEAN DAILY TEMP. (MDT) (C) 0.8 4.9 5.4 13.1 19.9 25.3 26.9 26.9 24.4 15.6 8.9 6.5 14.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 26.8 130.4 183.2 181.4 106.7 0.0 0.0 0.0 628.6 HEATING DEG. DAYS(BASE 18 0C) 533.7 379.4 389.4 148.3 11.1 0.0 0.0 0.0 0.0 76.3 273.6 356.4 2168.2 DEWPOINT (MEAN C) -4.9 -0.7 -1.0 1.8 6.8 7.5 8.6 8.1 3.6 2.5 -1.3 -2.9 2.3 MIXING RATIO (G/KG) 3.25 4.38 4.34 5.36 7.47 8.03 8.53 8.20 6.02 5.55 4.18 3.74 5.75 VAPOUR PRESSURE (HPA) 4.40 5.90 5.82 7.21 10.02 10.73 11.41 10.98 8.09 7.49 5.67 5.06 7.73 SATURATION DEF. (HPA) 2.11 2.78 3.33 8.18 14.12 22.32 24.89 26.00 23.15 10.46 5.68 4.50 12.29 RELATIVE HUMIDITY (MEAN %) 70 72 68 51 46 35 33 32 28 45 53 56 49 RELATIVE HUMIDITY (MAX. %) 85 87 86 71 65 51 45 44 39 62 69 73 65 RELATIVE HUMIDITY (MIN. %) 51 57 52 34 30 23 23 22 18 30 36 38 35 RELATIVE HUMIDITY (MEAN% 03UTC) 73 79 76 62 59 46 43 41 37 56 64 67 59 RELATIVE HUMIDITY (MEAN% 09UTC) 57 65 60 42 37 27 27 25 22 33 40 43 40 RELATIVE HUMIDITY (MEAN% 15UTC) 71 71 65 43 40 29 28 27 26 44 52 54 46 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 66.1 144.7 218.1 83.1 60.4 10.4 0.2 4.0 0.0 28.1 0.6 25.6 641.3 DAYS WITH PRECIPITATION >=10 2 5 8 2 2 0 0 0 0 1 0 1 21 DAYS WITH PRECIPITATION >= 5 5 7 14 5 4 1 0 0 0 1 0 2 39 DAYS WITH PRECIPITATION >= 1 9 12 19 12 7 3 0 1 0 2 0 3 68 DAYS WITH PRECIPITATION 14 15 21 15 12 5 2 1 0 4 4 6 99 GREATEST DAILY PRECIPITATION 18.0 38.0 50.0 29.7 22.0 6.0 0.2 4.0 0.0 27.0 0.5 17.0 50.0 DAY 6 2 2 3 8 28 11 30 ** 16 8 22 DAY WITH THUNDER STORM 0 1 1 4 3 3 1 1 0 1 1 0 16 DAYS WITH SNOW OR SLEET 9 9 9 0 0 0 0 0 0 0 1 0 28 DAYS WITH DUST 0 0 0 0 0 0 0 0 2 0 0 1 3 WIND DIRECTION (PREVAILING) 45 180 360 270 225 225 225 225 360 225 180 180 225 PREVAILING WIND SPEED(KNOTS) 4.8 6.1 5.5 8.0 7.2 6.3 5.8 5.9 5.3 6.9 6.6 5.3 6.4 PREVAILING WIND PERCENT 8.5 7.8 6.5 8.3 6.9 10.0 10.5 10.5 9.2 8.1 8.8 4.4 6.9 CALMS PERCENT OF WIND 63.7 68.1 75.8 62.5 66.5 63.3 68.1 59.7 59.6 63.3 73.3 79.0 66.9 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 92 160 286 247 251 239 259 251 242 245 192 264 241 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.3 0.3 1.0 0.7 1.1 0.8 0.5 0.5 0.6 0.5 0.2 0.5 WIND STEADINESES (MEAN %) 11.8 17.6 20.0 38.5 33.3 47.8 38.1 20.8 20.8 26.1 31.3 16.7 25.0 WIND SPEED (MEAN KNOTS) 1.7 1.7 1.5 2.6 2.1 2.3 2.1 2.4 2.4 2.3 1.6 1.2 2.0 FASTEST WIND DIRECTION 270 150 300 280 360 180 10 260 230 30 240 310 10 FASTEST WIND SPEED (KNOTS) 16 12 17 27 21 17 29 14 14 14 14 16 29 DAY 6 11 26 30 29 21 12 23 29 11 3 20 DAYS WITH SKY CLEAR (0-2)/8 10 7 5 9 12 22 17 27 29 22 17 13 190 DAYS WITH P.CLOUDY (3-6)/8 10 11 10 11 14 8 14 4 1 8 13 12 116 DAYS WITH CLOUDY (7-8)/8 11 11 16 10 5 0 0 0 0 1 0 6 60 DAYS WITH VISIBILITY =< 2 KM 1 7 5 0 0 0 0 0 2 0 0 0 15 DURATION OF SUNSHINE HOURS 113.5 121.5 132.2 193.3 261.2 324.3 324.3 347.8 299.6 255.1 199.3 167.4 2739.5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 846.7 843.4 841.9 844.2 844.9 842.3 843.6 843.4 843.4 847.6 850.3 848.2 845.0 MAX. QFE PRESSURE IN HPA 854.0 849.9 846.3 850.2 850.0 846.8 849.8 851.0 851.8 856.9 859.3 855.4 859.3 DAY-HOUR 10- 6 13- 6 6- 6 5- 6 7-21 27-21 4- 6 30- 6 25- 6 2- 6 18-18 8- 6 MIN. QFE PRESSURE IN HPA 839.3 832.8 835.5 837.3 840.5 838.0 837.1 837.9 837.4 840.0 843.8 840.6 832.8 DAY-HOUR 6-12 5-12 13-12 10-15 28-15 5-15 7-15 8-12 20-15 27-12 29-12 24-21 MEAN QNH PRESSURE IN HPA 1020.0 1016.3 1014.5 1017.2 1018.0 1015.0 1016.5 1016.3 1016.2 1021.2 1024.3 1021.9 1018.1 MAX. QNH PRESSURE IN HPA 1028.6 1023.8 1019.6 1024.2 1023.9 1020.2 1023.7 1025.1 1026.0 1032.0 1034.8 1030.2 1034.8 DAY-HOUR 10- 6 13- 6 6- 6 5- 6 7-21 27-21 4- 6 30- 6 25- 6 2- 6 18-18 8- 6 MIN. QNH PRESSURE IN HPA 1011.5 1003.9 1007.1 1009.2 1012.9 1010.0 1008.9 1009.9 1009.3 1012.3 1016.7 1013.0 1003.9 DAY-HOUR 6-12 5-12 13-12 10-15 28-15 5-15 7-15 8-12 20-15 27-12 29-12 24-21 MEAN QFF PRESSURE IN HPA 1023.1 1016.3 1014.1 1011.7 1008.0 1001.7 1002.1 1001.9 1003.8 1014.2 1022.1 1021.2 1011.7 MAX. QFF PRESSURE IN HPA 1032.3 1025.9 1019.7 1024.8 1015.6 1009.0 1008.6 1012.7 1016.0 1025.3 1035.7 1031.4 1035.7 DAY-HOUR 10- 6 13- 9 21-18 5- 6 7-21 27-21 4- 6 30- 6 25- 6 19- 6 18-15 2- 6 MIN. QFF PRESSURE IN HPA 1011.5 1003.2 1005.7 1002.3 1000.3 995.9 993.4 994.9 997.8 1003.8 1012.4 1011.9 993.4 DAY-HOUR 6-12 11- 0 13-12 13-12 29-12 5-15 7-12 8-12 9- 0 27-12 3-12 24-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 846.5 843.2 841.5 844.1 844.8 842.2 843.3 843.1 843.1 847.4 850.1 848.1 844.8 MAX. QFE PRESSURE IN HPA 853.0 848.4 845.4 849.6 849.0 845.8 848.2 849.6 849.6 853.4 858.9 854.2 858.9 DAY 10 24 29 5 7 28 4 30 25 2 19 8 MIN. QFE PRESSURE IN HPA 841.0 834.8 836.5 837.8 841.0 838.5 837.8 839.5 838.4 840.9 845.0 840.6 834.8 DAY 18 6 14 10 30 6 7 9 21 27 29 25 MEAN QNH PRESSURE IN HPA 1019.9 1016.0 1014.0 1017.0 1017.9 1014.9 1016.1 1015.9 1015.9 1021.0 1024.1 1021.7 1017.9 MAX. QNH PRESSURE IN HPA 1027.4 1022.1 1018.6 1023.5 1022.8 1019.1 1021.8 1023.5 1023.5 1027.9 1034.3 1028.8 1034.3 DAY 10 24 29 5 7 28 4 30 25 2 19 8 MIN. QNH PRESSURE IN HPA 1013.5 1006.3 1008.2 1009.7 1013.5 1010.6 1009.7 1011.7 1010.4 1013.4 1018.1 1013.0 1006.3 DAY 18 6 14 10 30 6 7 9 21 27 29 25 MEAN QFF PRESSURE IN HPA 1022.8 1015.8 1013.5 1011.4 1007.9 1001.4 1001.7 1001.3 1003.2 1013.5 1021.4 1020.5 1011.2 MAX. QFF PRESSURE IN HPA 1031.0 1024.1 1019.3 1022.5 1013.8 1007.3 1005.7 1010.7 1013.6 1023.0 1034.8 1029.4 1034.8 DAY 11 4 22 5 7 28 16 30 25 20 19 8 MIN. QFF PRESSURE IN HPA 1015.0 1003.2 1007.1 1003.6 1001.1 996.9 994.3 996.7 997.8 1004.1 1013.6 1012.1 994.3 DAY 7 11 26 10 29 24 8 9 9 27 7 25 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 846.6 843.3 841.7 844.2 845.2 842.8 844.2 844.0 843.7 847.8 850.4 848.3 845.2 MAX. QFE PRESSURE IN HPA 853.1 848.6 845.4 850.0 849.0 845.6 849.4 849.6 850.6 855.0 858.6 854.6 858.6 DAY 10 13 29 5 7 28 4 30 25 2 19 8 MIN. QFE PRESSURE IN HPA 840.9 835.4 837.1 838.2 842.0 838.5 838.4 839.9 838.6 840.9 845.4 841.6 835.4 DAY 19 5 13 10 29 6 7 8 22 27 29 25 MEAN QNH PRESSURE IN HPA 1020.0 1016.1 1014.3 1017.2 1018.4 1015.6 1017.2 1016.9 1016.7 1021.4 1024.4 1021.9 1018.3 MAX. QNH PRESSURE IN HPA 1027.6 1022.3 1018.6 1023.9 1022.8 1018.8 1023.2 1023.5 1024.6 1029.8 1033.9 1029.3 1033.9 DAY 10 13 29 5 7 28 4 30 25 2 19 8 MIN. QNH PRESSURE IN HPA 1013.4 1007.0 1008.9 1010.2 1014.6 1010.6 1010.4 1012.2 1010.7 1013.4 1018.6 1014.2 1007.0 DAY 19 5 13 10 29 6 7 8 22 27 29 25 MEAN QFF PRESSURE IN HPA 1023.7 1016.6 1014.4 1012.3 1008.9 1002.6 1003.3 1003.1 1004.9 1015.3 1023.2 1022.1 1012.5 MAX. QFF PRESSURE IN HPA 1031.8 1024.4 1019.3 1024.2 1014.6 1008.6 1008.0 1011.4 1015.4 1024.7 1035.4 1031.0 1035.4 DAY 11 13 29 5 7 27 4 30 25 19 19 8 MIN. QFF PRESSURE IN HPA 1016.5 1006.2 1006.3 1003.3 1001.8 997.2 995.7 997.8 999.6 1006.0 1015.9 1014.4 995.7 DAY 5 11 26 13 29 6 7 8 9 27 3 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 847.5 844.2 842.7 845.1 845.8 843.5 844.9 844.8 844.6 848.8 851.2 849.1 846.0 MAX. QFE PRESSURE IN HPA 854.0 849.9 846.3 850.2 849.4 845.9 849.8 851.0 851.8 856.9 859.2 855.4 859.2 DAY 10 13 6 5 7 28 4 30 25 2 18 8 MIN. QFE PRESSURE IN HPA 842.2 834.3 837.5 838.3 842.4 839.1 839.1 840.1 839.6 842.2 845.4 842.4 834.3 DAY 19 5 13 10 29 6 7 8 22 27 29 25 MEAN QNH PRESSURE IN HPA 1021.0 1017.2 1015.5 1018.2 1019.1 1016.4 1018.0 1017.9 1017.6 1022.5 1025.3 1022.9 1019.3 MAX. QNH PRESSURE IN HPA 1028.6 1023.8 1019.6 1024.2 1023.2 1019.2 1023.7 1025.1 1026.0 1032.0 1034.6 1030.2 1034.6 DAY 10 13 6 5 7 28 4 30 25 2 18 8 MIN. QNH PRESSURE IN HPA 1014.9 1005.7 1009.4 1010.3 1015.1 1011.3 1011.3 1012.4 1011.8 1014.9 1018.6 1015.1 1005.7 DAY 19 5 13 10 29 6 7 8 22 27 29 25 MEAN QFF PRESSURE IN HPA 1024.2 1017.3 1015.1 1012.7 1009.1 1003.0 1003.7 1003.4 1005.2 1015.5 1023.1 1022.5 1012.9 MAX. QFF PRESSURE IN HPA 1032.3 1025.8 1019.6 1024.8 1014.4 1007.7 1008.6 1012.7 1016.0 1025.3 1034.8 1031.4 1034.8 DAY 10 13 1 5 7 27 4 30 25 19 19 2 MIN. QFF PRESSURE IN HPA 1015.0 1008.7 1008.4 1003.3 1002.4 997.0 996.0 997.4 999.7 1006.4 1015.1 1014.4 996.0 DAY 6 5 13 13 29 5 7 8 19 27 3 25 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 846.8 843.8 842.4 844.8 845.3 843.0 844.2 844.1 844.0 848.0 850.3 848.4 845.4 MAX. QFE PRESSURE IN HPA 853.2 849.9 845.5 850.0 848.0 845.5 849.6 849.8 850.9 855.6 858.5 854.8 858.5 DAY 10 13 6 5 7 28 3 30 25 2 18 8 MIN. QFE PRESSURE IN HPA 841.6 833.7 837.1 838.3 841.9 838.9 838.8 839.1 838.9 841.9 845.0 842.4 833.7 DAY 19 5 13 10 29 6 7 8 20 27 29 25 MEAN QNH PRESSURE IN HPA 1020.2 1016.7 1015.1 1017.9 1018.5 1015.8 1017.2 1017.1 1017.0 1021.6 1024.3 1022.1 1018.6 MAX. QNH PRESSURE IN HPA 1027.7 1023.8 1018.7 1023.9 1021.6 1018.7 1023.5 1023.7 1025.0 1030.5 1033.8 1029.5 1033.8 DAY 10 13 6 5 7 28 3 30 25 2 18 8 MIN. QNH PRESSURE IN HPA 1014.2 1005.0 1008.9 1010.3 1014.5 1011.0 1010.9 1011.3 1011.0 1014.5 1018.1 1015.1 1005.0 DAY 19 5 13 10 29 6 7 8 20 27 29 25 MEAN QFF PRESSURE IN HPA 1022.8 1016.5 1014.4 1012.2 1008.2 1002.4 1002.7 1002.5 1004.2 1014.2 1021.6 1021.0 1011.9 MAX. QFF PRESSURE IN HPA 1030.8 1025.9 1019.0 1023.8 1013.7 1007.3 1007.7 1011.9 1014.3 1023.2 1033.6 1029.8 1033.6 DAY 10 13 21 5 8 28 3 30 25 19 18 8 MIN. QFF PRESSURE IN HPA 1015.2 1007.5 1008.2 1003.7 1001.2 997.0 995.6 996.1 999.6 1006.0 1013.9 1013.6 995.6 DAY 6 10 26 13 29 19 7 8 19 27 3 25 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 845.9 842.6 841.4 843.6 844.2 841.8 842.9 842.8 842.9 846.8 849.5 847.6 844.3 MAX. QFE PRESSURE IN HPA 852.4 848.2 844.3 848.0 847.3 845.0 848.6 848.3 849.5 854.2 858.0 853.7 858.0 DAY 10 13 6 4 4 3 3 29 25 2 18 8 MIN. QFE PRESSURE IN HPA 839.3 832.8 835.5 837.4 840.9 838.0 837.4 837.9 837.6 840.0 843.8 842.0 832.8 DAY 6 5 13 10 29 19 7 8 20 27 29 25 MEAN QNH PRESSURE IN HPA 1019.1 1015.4 1014.0 1016.5 1017.2 1014.4 1015.7 1015.6 1015.7 1020.2 1023.4 1021.1 1017.4 MAX. QNH PRESSURE IN HPA 1026.7 1021.8 1017.3 1021.6 1020.8 1018.1 1022.3 1022.0 1023.4 1028.8 1033.2 1028.2 1033.2 DAY 10 13 6 4 4 3 3 29 25 2 18 8 MIN. QNH PRESSURE IN HPA 1011.5 1003.9 1007.1 1009.3 1013.4 1010.0 1009.3 1009.9 1009.5 1012.3 1016.7 1014.6 1003.9 DAY 6 5 13 10 29 19 7 8 20 27 29 25 MEAN QFF PRESSURE IN HPA 1022.0 1015.1 1013.4 1010.9 1007.1 1001.0 1001.3 1001.0 1002.9 1012.8 1020.8 1019.9 1010.7 MAX. QFF PRESSURE IN HPA 1030.7 1023.3 1017.5 1021.7 1011.2 1005.3 1006.6 1009.6 1012.9 1021.6 1033.1 1028.3 1033.1 DAY 10 13 21 5 7 27 3 30 25 19 18 8 MIN. QFF PRESSURE IN HPA 1011.5 1003.3 1005.7 1002.3 1000.3 996.2 993.4 994.9 998.1 1003.8 1012.4 1013.3 993.4 DAY 6 10 13 13 29 5 7 8 8 27 3 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 846.4 843.0 841.7 843.5 844.0 841.3 842.5 842.4 842.5 847.0 850.1 848.0 844.4 MAX. QFE PRESSURE IN HPA 852.2 847.9 845.3 848.0 847.1 844.8 847.8 848.0 849.5 853.6 859.0 853.8 859.0 DAY 10 13 28 4 4 3 3 29 25 2 18 7 MIN. QFE PRESSURE IN HPA 840.3 833.6 836.3 837.3 840.5 838.0 837.1 837.9 837.4 840.2 844.8 842.3 833.6 DAY 6 5 13 10 28 5 7 8 20 27 28 24 MEAN QNH PRESSURE IN HPA 1019.8 1015.8 1014.2 1016.4 1016.9 1013.9 1015.2 1015.1 1015.2 1020.5 1024.1 1021.6 1017.4 MAX. QNH PRESSURE IN HPA 1026.5 1021.5 1018.5 1021.6 1020.6 1017.9 1021.4 1021.6 1023.4 1028.1 1034.4 1028.4 1034.4 DAY 10 13 28 4 4 3 3 29 25 2 18 7 MIN. QNH PRESSURE IN HPA 1012.7 1004.9 1008.0 1009.2 1012.9 1010.0 1008.9 1009.9 1009.3 1012.5 1017.9 1015.0 1004.9 DAY 6 5 13 10 28 5 7 8 20 27 28 24 MEAN QFF PRESSURE IN HPA 1023.4 1016.2 1014.1 1011.4 1007.3 1000.8 1001.3 1001.1 1003.4 1014.5 1022.8 1021.7 1011.5 MAX. QFF PRESSURE IN HPA 1031.0 1023.3 1018.6 1021.5 1012.5 1007.5 1006.2 1009.2 1013.8 1023.7 1035.7 1030.6 1035.7 DAY 25 13 15 5 11 26 3 30 25 19 18 3 MIN. QFF PRESSURE IN HPA 1013.5 1004.6 1005.9 1002.6 1000.9 995.9 993.6 995.3 998.0 1005.6 1014.5 1014.5 993.6 DAY 6 10 25 13 28 5 7 8 8 27 3 29 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 846.9 843.7 842.2 844.3 844.9 841.9 843.3 843.2 843.1 847.7 850.5 848.4 845.0 MAX. QFE PRESSURE IN HPA 853.2 848.8 846.1 849.2 848.2 846.4 848.6 849.2 849.7 854.0 859.3 854.4 859.3 DAY 10 13 28 4 4 27 3 30 25 2 18 7 MIN. QFE PRESSURE IN HPA 840.9 834.5 836.3 838.4 840.7 838.3 838.0 838.5 838.0 840.8 845.4 841.3 834.5 DAY 6 5 13 10 29 5 7 8 21 27 28 24 MEAN QNH PRESSURE IN HPA 1020.4 1016.6 1014.8 1017.3 1018.0 1014.6 1016.2 1016.0 1016.0 1021.2 1024.5 1022.1 1018.1 MAX. QNH PRESSURE IN HPA 1027.7 1022.5 1019.4 1023.0 1021.8 1019.8 1022.3 1023.0 1023.6 1028.6 1034.8 1029.1 1034.8 DAY 10 13 28 4 4 27 3 30 25 2 18 7 MIN. QNH PRESSURE IN HPA 1013.4 1005.9 1008.0 1010.4 1013.1 1010.3 1010.0 1010.6 1010.0 1013.2 1018.6 1013.8 1005.9 DAY 6 5 13 10 29 5 7 8 21 27 28 24 MEAN QFF PRESSURE IN HPA 1023.5 1016.7 1014.2 1011.8 1007.8 1001.2 1001.8 1001.6 1003.5 1014.2 1022.3 1021.6 1011.7 MAX. QFF PRESSURE IN HPA 1032.1 1024.4 1019.7 1022.8 1013.6 1008.1 1006.3 1011.5 1013.2 1024.0 1035.0 1030.2 1035.0 DAY 10 13 21 4 8 27 4 30 25 19 18 3 MIN. QFF PRESSURE IN HPA 1013.0 1005.8 1007.6 1004.7 1001.1 996.2 994.7 995.8 998.2 1004.5 1014.0 1013.8 994.7 DAY 6 10 13 12 29 5 7 8 18 27 6 24 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 846.7 843.5 842.0 844.3 845.0 842.2 843.4 843.3 843.2 847.7 850.4 848.2 845.0 MAX. QFE PRESSURE IN HPA 852.8 848.5 845.8 849.2 850.0 846.8 848.4 849.0 849.6 853.8 859.3 854.6 859.3 DAY 9 13 28 4 7 27 3 29 25 1 18 7 MIN. QFE PRESSURE IN HPA 841.2 834.2 836.3 838.3 841.0 838.5 838.0 839.1 838.2 842.0 845.4 840.6 834.2 DAY 6 5 13 9 29 5 7 8 21 27 28 24 MEAN QNH PRESSURE IN HPA 1020.2 1016.4 1014.7 1017.3 1018.2 1014.8 1016.2 1016.1 1016.0 1021.2 1024.4 1021.9 1018.1 MAX. QNH PRESSURE IN HPA 1027.2 1022.2 1019.1 1023.0 1023.9 1020.2 1022.1 1022.8 1023.5 1028.4 1034.8 1029.3 1034.8 DAY 9 13 28 4 7 27 3 29 25 1 18 7 MIN. QNH PRESSURE IN HPA 1013.7 1005.6 1008.0 1010.3 1013.5 1010.6 1010.0 1011.3 1010.2 1014.6 1018.6 1013.0 1005.6 DAY 6 5 13 9 29 5 7 8 21 27 28 24 MEAN QFF PRESSURE IN HPA 1022.8 1016.2 1013.9 1011.5 1007.8 1001.4 1001.6 1001.6 1003.2 1013.9 1021.7 1020.7 1011.4 MAX. QFF PRESSURE IN HPA 1031.0 1024.6 1019.0 1022.0 1015.6 1009.0 1005.9 1011.0 1013.1 1023.4 1034.6 1029.6 1034.6 DAY 10 13 21 4 7 27 3 30 24 18 18 7 MIN. QFF PRESSURE IN HPA 1013.9 1004.8 1007.9 1004.9 1001.3 996.7 993.5 995.8 998.3 1005.6 1013.1 1011.9 993.5 DAY 6 10 25 10 29 5 7 8 18 26 6 24 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.1 3.4 5.9 14.1 19.5 25.6 29.8 28.9 22.6 17.7 8.3 3.9 15.3 MINIMUN AIR TEMPERATURE (C) 0.4 -1.3 1.6 9.1 13.9 20.0 24.2 23.0 17.0 12.3 5.1 0.8 10.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 8 29 26 3 0 0 0 67 DAYS WITH MINIMUM TEMP. <=-4 2 9 1 0 0 0 0 0 0 0 0 1 13 DAYS WITH FREEZING MIN.<= 0 13 17 9 1 0 0 0 0 0 0 0 11 51 TEMPERATURE RECORDS LOWEST(C) -8.8 -8.6 -6.2 -1.6 6.6 16.0 19.4 18.6 11.6 6.8 1.0 -4.0 -8.8 DAY 29 7 8 12 6 2 7 30 15 25 29 28 MAXIMUM AIR TEMPERATURE (C) 8.5 8.5 10.1 19.0 25.0 31.2 35.7 34.7 28.3 23.6 12.3 7.9 20.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 4 25 31 31 8 0 0 0 99 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.6 14.6 16.8 27.4 33.0 34.4 38.4 38.2 33.2 28.0 16.6 12.2 38.4 DAY 1 18 22 26 28 27 14 15 1 4 6 6 DIF. BETWEEN (MAX.-MIN.) (C) 8.1 9.8 8.5 9.9 11.1 11.2 11.5 11.7 11.3 11.3 7.2 7.1 9.9 MEAN DAILY TEMP. (MDT) (C) 4.5 3.6 5.9 14.1 19.5 25.6 30.0 28.9 22.6 18.0 8.7 4.3 15.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.1 22.9 137.4 277.5 244.2 56.6 2.4 0.0 0.0 741.2 HEATING DEG. DAYS(BASE 18 0C) 419.1 403.0 375.5 132.6 17.7 0.0 0.0 0.0 0.7 31.8 279.7 424.2 2084.4 DEWPOINT (MEAN C) -4.7 -9.4 -3.8 -0.6 3.2 5.9 8.5 6.2 2.6 1.9 2.1 -1.1 0.9 MIXING RATIO (G/KG) 3.29 2.36 3.61 4.57 5.79 7.06 8.47 7.24 5.57 5.30 5.36 4.25 5.24 VAPOUR PRESSURE (HPA) 4.44 3.19 4.84 6.14 7.78 9.44 11.27 9.69 7.51 7.16 7.25 5.74 7.04 SATURATION DEF. (HPA) 3.98 5.04 4.78 10.85 15.74 24.16 31.67 31.08 20.72 13.80 3.88 2.49 14.01 RELATIVE HUMIDITY (MEAN %) 55 41 54 39 36 30 28 25 29 37 68 72 43 RELATIVE HUMIDITY (MAX. %) 70 57 74 55 52 43 38 35 41 51 83 86 57 RELATIVE HUMIDITY (MIN. %) 39 26 38 28 25 20 19 17 18 24 50 54 30 RELATIVE HUMIDITY (MEAN% 03UTC) 66 53 64 48 45 40 36 32 38 46 77 77 52 RELATIVE HUMIDITY (MEAN% 09UTC) 43 33 44 33 28 26 23 20 21 27 54 60 34 RELATIVE HUMIDITY (MEAN% 15UTC) 51 34 46 32 29 22 21 22 25 34 67 74 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 22.6 7.8 85.3 18.0 6.2 12.2 0.3 0.0 0.0 2.8 61.8 52.7 269.7 DAYS WITH PRECIPITATION >=10 1 0 4 1 0 0 0 0 0 0 3 1 10 DAYS WITH PRECIPITATION >= 5 2 0 5 1 0 1 0 0 0 0 4 3 16 DAYS WITH PRECIPITATION >= 1 2 2 9 3 2 3 0 0 0 1 11 8 41 DAYS WITH PRECIPITATION 8 3 13 6 8 8 1 0 0 6 14 12 79 GREATEST DAILY PRECIPITATION 15.2 4.0 22.0 13.0 3.3 5.0 0.3 0.0 0.0 1.1 17.8 20.4 22.0 DAY 16 21 29 5 4 15 6 ** ** 31 1 10 DAY WITH THUNDER STORM 0 0 0 0 1 7 2 0 0 2 0 0 12 DAYS WITH SNOW OR SLEET 4 0 3 0 0 0 0 0 0 0 0 7 14 DAYS WITH DUST 1 0 2 1 0 0 0 0 0 0 0 1 5 WIND DIRECTION (PREVAILING) 180 180 225 225 225 225 180 225 180 225 180 180 225 PREVAILING WIND SPEED(KNOTS) 6.3 6.7 6.7 7.3 7.1 7.1 6.5 6.2 6.4 7.9 6.1 5.4 6.9 PREVAILING WIND PERCENT 5.6 12.5 8.5 12.9 10.9 14.6 9.7 12.5 10.4 10.5 6.3 4.0 8.6 CALMS PERCENT OF WIND 76.6 66.5 66.1 52.5 58.9 45.0 60.1 62.1 57.1 60.9 82.5 81.5 64.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 216 215 229 243 249 268 220 227 228 231 180 170 234 VECTOR WIND MAGNITUDE(KNOTS) 0.5 1.1 0.4 1.9 1.5 1.3 0.9 0.9 1.2 1.1 0.3 0.1 0.9 WIND STEADINESES (MEAN %) 33.3 50.0 17.4 54.3 46.9 32.5 37.5 39.1 42.9 40.7 30.0 10.0 37.5 WIND SPEED (MEAN KNOTS) 1.5 2.2 2.3 3.5 3.2 4.0 2.4 2.3 2.8 2.7 1.0 1.0 2.4 FASTEST WIND DIRECTION 280 270 60 280 360 270 180 270 300 350 140 310 280 FASTEST WIND SPEED (KNOTS) 17 16 16 25 23 19 12 12 17 17 16 12 25 DAY 28 6 6 10 9 9 5 5 2 13 6 9 DAYS WITH SKY CLEAR (0-2)/8 16 22 10 14 12 19 22 29 29 22 9 10 214 DAYS WITH P.CLOUDY (3-6)/8 9 4 9 12 18 10 9 2 1 7 11 11 103 DAYS WITH CLOUDY (7-8)/8 6 2 12 4 1 1 0 0 0 2 10 10 48 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 1 1 DURATION OF SUNSHINE HOURS 187.1 226.6 170.8 246.4 285.8 290.1 338.9 354.7 312.3 248.8 115.7 119.0 2896.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 844.2 844.1 840.7 842.4 845.1 841.9 839.2 842.5 845.7 847.4 848.4 845.7 843.9 MAX. QFE PRESSURE IN HPA 851.7 851.4 854.2 849.4 851.7 846.9 843.1 847.4 851.6 853.5 858.6 853.4 858.6 DAY-HOUR 23-21 17- 6 11- 6 24- 6 12- 6 8- 6 19- 6 28- 6 19- 6 9- 6 8- 6 29- 6 MIN. QFE PRESSURE IN HPA 833.7 835.9 830.6 834.0 836.2 836.2 834.5 837.2 839.0 843.0 844.7 837.6 830.6 DAY-HOUR 17-12 1- 0 29-15 10-15 4-21 24-15 16-15 5-15 2-15 23-12 20-12 10-12 MEAN QNH PRESSURE IN HPA 1017.2 1017.1 1013.1 1015.1 1018.2 1014.6 1011.4 1015.2 1018.9 1020.9 1022.0 1018.9 1016.9 MAX. QNH PRESSURE IN HPA 1025.9 1025.6 1028.8 1023.2 1025.9 1020.3 1015.9 1020.9 1025.8 1028.0 1033.9 1027.9 1033.9 DAY-HOUR 23-21 17- 6 11- 6 24- 6 12- 6 8- 6 19- 6 28- 6 19- 6 9- 6 8- 6 29- 6 MIN. QNH PRESSURE IN HPA 1005.0 1007.5 1001.4 1005.3 1007.9 1007.9 1005.9 1009.1 1011.1 1015.8 1017.8 1009.5 1001.4 DAY-HOUR 17-12 1- 0 29-15 10-15 4-21 24-15 16-15 5-15 2-15 23-12 20-12 10-12 MEAN QFF PRESSURE IN HPA 1017.6 1018.1 1012.2 1008.9 1008.6 1001.2 995.5 999.9 1007.4 1012.5 1019.6 1019.4 1010.1 MAX. QFF PRESSURE IN HPA 1028.2 1030.3 1030.0 1020.3 1018.0 1007.1 1000.7 1006.9 1015.2 1019.8 1032.5 1032.5 1032.5 DAY-HOUR 24- 6 7-15 11- 6 13- 6 7- 3 8- 6 8- 9 28- 6 19- 6 9- 6 8- 6 28- 6 MIN. QFF PRESSURE IN HPA 1003.8 1007.3 998.9 1000.6 999.1 994.3 989.6 992.6 996.2 1006.0 1013.8 1007.8 989.6 DAY-HOUR 17-12 22-21 29-15 9-15 4-21 30-18 15-21 14-15 2-15 7- 0 20-12 9-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 844.4 843.5 840.2 842.1 844.9 842.0 839.0 842.1 845.2 847.4 848.1 845.5 843.7 MAX. QFE PRESSURE IN HPA 851.6 849.6 851.0 848.2 849.4 845.7 841.9 845.4 850.4 852.0 856.9 852.5 856.9 DAY 24 17 12 24 7 1 20 29 19 9 8 29 MIN. QFE PRESSURE IN HPA 835.7 835.9 832.0 835.4 837.0 838.3 835.3 837.2 840.0 844.0 845.4 838.4 832.0 DAY 17 1 30 11 5 25 16 6 3 24 13 10 MEAN QNH PRESSURE IN HPA 1017.4 1016.4 1012.6 1014.7 1018.0 1014.6 1011.1 1014.8 1018.4 1020.9 1021.8 1018.7 1016.6 MAX. QNH PRESSURE IN HPA 1025.8 1023.5 1025.1 1021.8 1023.2 1018.9 1014.5 1018.6 1024.4 1026.3 1032.0 1026.9 1032.0 DAY 24 17 12 24 7 1 20 29 19 9 8 29 MIN. QNH PRESSURE IN HPA 1007.3 1007.5 1003.0 1007.0 1008.8 1010.3 1006.8 1009.1 1012.3 1017.0 1018.6 1010.4 1003.0 DAY 17 1 30 11 5 25 16 6 3 24 13 10 MEAN QFF PRESSURE IN HPA 1017.4 1017.0 1011.4 1008.4 1008.5 1001.1 995.0 999.3 1006.5 1012.1 1019.0 1018.9 1009.6 MAX. QFF PRESSURE IN HPA 1027.2 1026.8 1025.0 1018.0 1017.3 1006.7 998.7 1004.6 1012.9 1017.5 1029.9 1029.8 1029.9 DAY 24 8 11 13 7 1 10 29 19 9 8 29 MIN. QFF PRESSURE IN HPA 1004.8 1007.4 1000.8 1002.2 1001.9 996.7 990.3 993.1 998.0 1006.0 1014.2 1008.7 990.3 DAY 16 23 25 10 5 30 16 15 3 7 23 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 844.3 844.0 840.7 842.5 845.4 842.5 839.7 843.0 846.0 847.7 848.5 845.6 844.2 MAX. QFE PRESSURE IN HPA 851.2 849.6 852.2 849.1 850.6 845.4 842.8 846.0 850.4 852.6 857.2 852.5 857.2 DAY 24 17 11 24 12 11 9 25 18 9 8 29 MIN. QFE PRESSURE IN HPA 836.4 839.0 834.4 835.0 837.0 838.3 835.8 838.9 841.0 844.3 845.5 838.2 834.4 DAY 17 27 30 11 5 24 16 5 3 24 19 10 MEAN QNH PRESSURE IN HPA 1017.3 1017.0 1013.1 1015.2 1018.6 1015.3 1012.0 1015.8 1019.2 1021.3 1022.2 1018.8 1017.2 MAX. QNH PRESSURE IN HPA 1025.3 1023.5 1026.5 1022.9 1024.6 1018.6 1015.6 1019.3 1024.4 1027.0 1032.3 1026.9 1032.3 DAY 24 17 11 24 12 11 9 25 18 9 8 29 MIN. QNH PRESSURE IN HPA 1008.1 1011.1 1005.8 1006.5 1008.8 1010.3 1007.4 1011.0 1013.5 1017.3 1018.7 1010.2 1005.8 DAY 17 27 30 11 5 24 16 5 3 24 19 10 MEAN QFF PRESSURE IN HPA 1018.3 1018.9 1012.8 1009.5 1009.6 1002.1 996.2 1001.0 1008.3 1013.8 1020.4 1020.0 1010.9 MAX. QFF PRESSURE IN HPA 1027.9 1027.4 1028.0 1019.4 1018.0 1006.4 1000.7 1006.6 1014.5 1019.1 1030.7 1031.2 1031.2 DAY 24 8 11 13 7 7 9 29 15 9 8 29 MIN. QFF PRESSURE IN HPA 1006.5 1009.2 1000.6 1002.3 1002.8 997.4 991.4 994.6 999.2 1007.4 1015.9 1008.4 991.4 DAY 16 22 25 5 5 30 16 15 3 7 23 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 845.2 845.2 841.8 843.5 846.2 843.1 840.4 843.8 846.9 848.5 849.4 846.7 845.1 MAX. QFE PRESSURE IN HPA 851.7 851.4 854.2 849.4 851.7 846.9 843.1 847.4 851.6 853.5 858.6 853.4 858.6 DAY 24 17 11 24 12 8 19 28 19 9 8 29 MIN. QFE PRESSURE IN HPA 836.2 840.2 834.5 836.6 838.7 838.5 836.4 839.4 841.0 845.2 846.0 838.6 834.5 DAY 16 27 25 10 5 24 16 5 2 23 19 10 MEAN QNH PRESSURE IN HPA 1018.3 1018.4 1014.4 1016.4 1019.5 1015.9 1012.8 1016.7 1020.4 1022.2 1023.2 1020.1 1018.2 MAX. QNH PRESSURE IN HPA 1025.9 1025.6 1028.8 1023.2 1025.9 1020.3 1015.9 1020.9 1025.8 1028.0 1033.9 1027.9 1033.9 DAY 24 17 11 24 12 8 19 28 19 9 8 29 MIN. QNH PRESSURE IN HPA 1007.9 1012.5 1005.9 1008.4 1010.8 1010.6 1008.1 1011.6 1013.5 1018.4 1019.3 1010.7 1005.9 DAY 16 27 25 10 5 24 16 5 2 23 19 10 MEAN QFF PRESSURE IN HPA 1018.9 1019.5 1013.7 1010.3 1009.7 1002.5 996.8 1001.6 1009.0 1013.6 1020.8 1020.7 1011.4 MAX. QFF PRESSURE IN HPA 1028.2 1028.7 1030.0 1020.3 1017.0 1007.1 1000.6 1006.9 1015.2 1019.8 1032.5 1032.5 1032.5 DAY 24 7 11 13 16 8 8 28 19 9 8 28 MIN. QFF PRESSURE IN HPA 1006.8 1010.5 1002.5 1002.8 1003.8 997.0 991.6 995.7 999.2 1008.4 1015.5 1009.0 991.6 DAY 16 22 25 28 4 24 16 6 2 7 20 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 844.4 844.8 841.2 843.0 845.5 842.6 840.0 843.1 846.4 847.6 848.6 845.7 844.4 MAX. QFE PRESSURE IN HPA 851.0 850.1 852.8 848.3 850.8 846.5 842.8 846.8 850.8 852.9 857.2 852.5 857.2 DAY 19 17 11 23 12 8 19 28 18 9 8 28 MIN. QFE PRESSURE IN HPA 835.1 839.2 833.4 835.8 837.6 838.5 835.9 839.0 840.2 844.2 844.8 838.6 833.4 DAY 17 27 25 10 5 24 16 5 2 23 19 10 MEAN QNH PRESSURE IN HPA 1017.5 1017.9 1013.7 1015.8 1018.7 1015.3 1012.3 1015.9 1019.8 1021.2 1022.3 1018.9 1017.4 MAX. QNH PRESSURE IN HPA 1025.1 1024.1 1027.2 1022.0 1024.9 1019.9 1015.6 1020.2 1024.9 1027.3 1032.3 1026.9 1032.3 DAY 19 17 11 23 12 8 19 28 18 9 8 28 MIN. QNH PRESSURE IN HPA 1006.6 1011.4 1004.6 1007.4 1009.5 1010.6 1007.5 1011.1 1012.5 1017.2 1017.9 1010.7 1004.6 DAY 17 27 25 10 5 24 16 5 2 23 19 10 MEAN QFF PRESSURE IN HPA 1017.5 1018.6 1012.5 1009.4 1008.9 1001.8 996.2 1000.5 1008.0 1012.2 1019.5 1019.0 1010.4 MAX. QFF PRESSURE IN HPA 1026.3 1028.8 1027.1 1019.9 1016.0 1006.6 1000.7 1006.4 1014.2 1018.3 1029.9 1029.7 1029.9 DAY 19 7 11 13 16 8 8 28 18 9 7 28 MIN. QFF PRESSURE IN HPA 1005.6 1009.2 1001.0 1003.3 1001.8 997.1 991.0 994.8 998.5 1007.6 1013.9 1010.9 991.0 DAY 17 22 25 10 5 30 16 14 2 6 19 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 843.3 843.6 840.0 841.8 844.3 841.4 838.8 841.9 845.0 846.5 847.7 845.0 843.3 MAX. QFE PRESSURE IN HPA 849.6 849.4 851.2 847.4 849.3 845.1 842.1 845.7 849.8 851.8 856.0 851.7 856.0 DAY 23 7 11 13 12 8 19 28 18 9 7 28 MIN. QFE PRESSURE IN HPA 833.7 838.2 831.3 834.8 836.9 837.3 834.9 837.4 839.4 843.0 844.7 837.6 831.3 DAY 17 27 29 10 5 24 16 5 2 23 20 10 MEAN QNH PRESSURE IN HPA 1016.1 1016.4 1012.4 1014.4 1017.3 1013.9 1010.9 1014.5 1018.2 1019.9 1021.3 1018.1 1016.1 MAX. QNH PRESSURE IN HPA 1023.5 1023.2 1025.3 1020.9 1023.1 1018.2 1014.8 1018.9 1023.7 1026.0 1030.9 1025.9 1030.9 DAY 23 7 11 13 12 8 19 28 18 9 7 28 MIN. QNH PRESSURE IN HPA 1005.0 1010.2 1002.2 1006.3 1008.7 1009.2 1006.4 1009.3 1011.6 1015.8 1017.8 1009.5 1002.2 DAY 17 27 29 10 5 24 16 5 2 23 20 10 MEAN QFF PRESSURE IN HPA 1016.2 1017.0 1011.2 1008.0 1007.7 1000.4 994.7 999.0 1006.4 1011.2 1018.6 1018.2 1009.1 MAX. QFF PRESSURE IN HPA 1025.7 1028.6 1025.1 1019.0 1014.4 1004.8 999.3 1005.3 1013.4 1016.8 1029.1 1028.8 1029.1 DAY 23 7 11 13 7 6 8 28 18 9 7 28 MIN. QFF PRESSURE IN HPA 1003.8 1008.6 999.4 1002.2 1001.5 994.9 990.4 993.8 996.6 1006.0 1013.8 1007.8 990.4 DAY 17 22 29 10 5 30 16 5 2 3 20 10 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 843.6 843.6 840.1 841.6 844.0 840.7 838.1 841.4 844.7 846.7 848.0 845.6 843.2 MAX. QFE PRESSURE IN HPA 850.3 849.7 851.0 847.0 848.8 844.1 840.8 845.4 849.0 851.8 856.4 853.0 856.4 DAY 23 7 11 13 11 8 19 28 18 9 7 28 MIN. QFE PRESSURE IN HPA 834.7 838.6 830.6 834.0 837.4 836.2 834.5 837.2 839.0 843.0 845.0 838.2 830.6 DAY 17 27 29 10 5 24 16 5 2 23 19 10 MEAN QNH PRESSURE IN HPA 1016.5 1016.5 1012.4 1014.2 1017.0 1013.1 1010.2 1014.0 1017.7 1020.1 1021.6 1018.8 1016.0 MAX. QNH PRESSURE IN HPA 1024.3 1023.6 1025.1 1020.5 1022.5 1017.1 1013.2 1018.6 1022.8 1026.0 1031.4 1027.4 1031.4 DAY 23 7 11 13 11 8 19 28 18 9 7 28 MIN. QNH PRESSURE IN HPA 1006.1 1010.7 1001.4 1005.3 1009.3 1007.9 1005.9 1009.1 1011.1 1015.8 1018.1 1010.2 1001.4 DAY 17 27 29 10 5 24 16 5 2 23 19 10 MEAN QFF PRESSURE IN HPA 1017.5 1018.4 1011.9 1008.4 1007.9 1000.0 994.4 999.0 1006.8 1012.7 1019.8 1019.9 1009.7 MAX. QFF PRESSURE IN HPA 1027.3 1030.3 1025.7 1018.8 1015.5 1004.3 998.3 1005.3 1013.8 1018.3 1029.8 1031.8 1031.8 DAY 23 7 11 13 6 7 8 28 15 9 7 28 MIN. QFF PRESSURE IN HPA 1005.8 1009.3 998.9 1000.6 1001.8 994.5 989.8 992.6 996.2 1006.3 1014.8 1007.8 989.8 DAY 17 22 29 9 4 30 16 14 2 6 5 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 844.2 844.1 840.9 842.5 845.1 841.6 838.9 842.2 845.6 847.5 848.4 846.0 843.9 MAX. QFE PRESSURE IN HPA 851.5 850.2 852.2 847.6 849.2 844.8 841.8 845.8 849.6 852.4 857.1 853.3 857.1 DAY 23 7 11 23 11 11 19 28 18 8 7 28 MIN. QFE PRESSURE IN HPA 835.2 838.7 832.8 835.4 836.8 837.3 835.7 837.6 840.2 844.0 844.7 839.0 832.8 DAY 31 22 29 10 4 30 16 5 2 23 30 10 MEAN QNH PRESSURE IN HPA 1017.2 1017.1 1013.4 1015.2 1018.3 1014.2 1011.1 1014.9 1018.8 1021.0 1022.1 1019.3 1016.9 MAX. QNH PRESSURE IN HPA 1025.7 1024.2 1026.5 1021.2 1023.0 1017.9 1014.4 1019.1 1023.5 1026.7 1032.2 1027.8 1032.2 DAY 23 7 11 23 11 11 19 28 18 8 7 28 MIN. QNH PRESSURE IN HPA 1006.7 1010.8 1003.9 1007.0 1008.6 1009.2 1007.3 1009.5 1012.5 1017.0 1017.8 1011.1 1003.9 DAY 31 22 29 10 4 30 16 5 2 23 30 10 MEAN QFF PRESSURE IN HPA 1017.8 1018.2 1012.5 1009.0 1008.5 1000.8 995.1 999.6 1007.4 1012.4 1019.7 1019.9 1010.1 MAX. QFF PRESSURE IN HPA 1028.0 1030.1 1026.8 1018.8 1015.6 1005.1 999.1 1005.6 1014.1 1018.5 1030.3 1032.3 1032.3 DAY 23 7 11 12 6 1 9 28 15 8 7 28 MIN. QFF PRESSURE IN HPA 1007.1 1007.7 1002.1 1001.6 999.7 994.3 990.7 992.7 998.5 1006.2 1014.8 1009.2 990.7 DAY 17 22 25 9 4 30 15 14 2 6 22 9 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 844.1 844.2 840.8 842.3 845.1 841.8 839.2 842.3 845.6 847.6 848.4 845.8 843.9 MAX. QFE PRESSURE IN HPA 851.7 849.7 852.1 847.6 849.4 845.3 842.0 845.4 850.4 852.1 857.1 853.0 857.1 DAY 23 7 11 23 12 11 19 28 18 8 7 28 MIN. QFE PRESSURE IN HPA 835.4 838.6 832.4 835.4 836.2 837.5 835.1 837.6 840.4 844.0 845.4 839.0 832.4 DAY 31 27 29 10 4 30 15 5 2 23 22 9 MEAN QNH PRESSURE IN HPA 1017.1 1017.1 1013.2 1015.0 1018.2 1014.4 1011.3 1015.0 1018.8 1021.1 1022.1 1019.0 1016.9 MAX. QNH PRESSURE IN HPA 1025.9 1023.6 1026.4 1021.2 1023.2 1018.5 1014.6 1018.6 1024.4 1026.4 1032.2 1027.4 1032.2 DAY 23 7 11 23 12 11 19 28 18 8 7 28 MIN. QNH PRESSURE IN HPA 1007.0 1010.7 1003.5 1007.0 1007.9 1009.4 1006.6 1009.5 1012.8 1017.0 1018.6 1011.1 1003.5 DAY 31 27 29 10 4 30 15 5 2 23 22 9 MEAN QFF PRESSURE IN HPA 1017.1 1017.7 1011.9 1008.6 1008.3 1000.9 995.3 999.6 1007.1 1012.2 1019.3 1019.2 1009.8 MAX. QFF PRESSURE IN HPA 1027.2 1028.5 1025.8 1018.3 1016.9 1005.3 999.2 1005.0 1013.5 1017.8 1030.2 1030.2 1030.2 DAY 23 7 11 12 6 1 8 28 18 8 7 28 MIN. QFF PRESSURE IN HPA 1005.1 1007.3 1001.8 1001.8 999.1 994.7 989.6 992.8 998.3 1006.0 1014.5 1008.6 989.6 DAY 15 22 24 9 4 30 15 14 2 6 22 9 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.5 2.7 8.0 15.8 19.2 26.4 28.2 27.4 23.1 16.6 12.6 8.5 15.8 MINIMUN AIR TEMPERATURE (C) -2.8 -1.2 3.7 10.7 13.9 20.6 22.7 21.9 17.4 11.5 7.8 4.4 10.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 12 27 23 2 0 0 0 65 DAYS WITH MINIMUM TEMP. <=-4 9 5 1 0 0 0 0 0 0 0 0 0 15 DAYS WITH FREEZING MIN.<= 0 28 20 7 0 0 0 0 0 0 0 0 2 57 TEMPERATURE RECORDS LOWEST(C) -9.4 -9.4 -4.8 3.0 7.0 15.4 18.2 17.6 14.2 7.0 5.0 -1.0 -9.4 DAY 14 17 3 25 4 1 21 6 13 11 25 6 MAXIMUM AIR TEMPERATURE (C) 4.5 6.8 12.5 21.3 24.8 31.8 33.8 33.0 29.1 22.9 18.4 13.7 21.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 24 29 25 10 0 0 0 89 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 8.0 13.6 19.2 28.4 30.2 36.0 38.6 35.8 33.6 29.2 22.0 19.0 38.6 DAY 27 7 24 15 11 28 11 17 3 1 3 16 DIF. BETWEEN (MAX.-MIN.) (C) 7.3 8.0 8.8 10.6 10.9 11.2 11.1 11.1 11.7 11.4 10.6 9.3 10.2 MEAN DAILY TEMP. (MDT) (C) 0.9 2.8 8.1 16.0 19.3 26.2 28.2 27.4 23.2 17.2 13.1 9.1 16.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 4.0 16.7 155.7 224.5 199.9 71.1 7.7 0.0 0.0 679.6 HEATING DEG. DAYS(BASE 18 0C) 531.5 425.1 306.5 83.1 23.0 0.0 0.0 0.0 0.0 54.2 147.3 276.1 1846.7 DEWPOINT (MEAN C) -4.4 -4.2 -2.6 1.6 5.8 5.8 9.3 10.5 6.8 2.5 -1.1 -0.3 2.5 MIXING RATIO (G/KG) 3.40 3.45 4.01 5.33 6.98 6.92 8.95 9.64 7.51 5.51 4.26 4.49 5.87 VAPOUR PRESSURE (HPA) 4.58 4.65 5.39 7.16 9.37 9.29 11.93 12.87 10.07 7.45 5.77 6.09 7.88 SATURATION DEF. (HPA) 1.87 3.06 5.88 11.63 13.80 25.88 27.21 24.60 19.07 12.39 9.20 5.35 13.33 RELATIVE HUMIDITY (MEAN %) 72 64 52 42 44 28 32 36 37 42 41 57 46 RELATIVE HUMIDITY (MAX. %) 87 81 69 61 63 39 46 48 50 56 55 72 61 RELATIVE HUMIDITY (MIN. %) 53 47 36 28 30 19 23 27 25 27 29 42 32 RELATIVE HUMIDITY (MEAN% 03UTC) 77 73 64 53 58 38 43 47 47 51 50 64 55 RELATIVE HUMIDITY (MEAN% 09UTC) 62 55 46 33 36 23 28 30 28 31 30 45 37 RELATIVE HUMIDITY (MEAN% 15UTC) 74 59 48 36 36 22 26 31 34 41 42 57 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 107.6 98.2 83.0 46.2 47.6 4.9 0.8 3.9 17.4 5.0 1.4 80.7 496.7 DAYS WITH PRECIPITATION >=10 5 5 4 1 1 0 0 0 1 0 0 2 19 DAYS WITH PRECIPITATION >= 5 7 8 5 3 2 0 0 0 1 0 0 2 28 DAYS WITH PRECIPITATION >= 1 8 10 10 7 9 1 0 2 2 2 0 3 54 DAYS WITH PRECIPITATION 12 11 12 9 13 3 5 5 5 4 4 5 88 GREATEST DAILY PRECIPITATION 23.0 21.0 27.0 13.0 17.0 4.0 0.4 2.3 13.6 4.0 0.8 39.0 39.0 DAY 9 12 30 6 4 1 30 3 14 11 16 4 DAY WITH THUNDER STORM 0 0 1 3 7 2 2 1 3 0 0 1 20 DAYS WITH SNOW OR SLEET 12 8 4 1 1 0 0 0 0 0 0 2 28 DAYS WITH DUST 1 0 0 0 1 0 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 180 360 225 225 270 180 180 225 225 225 360 360 225 PREVAILING WIND SPEED(KNOTS) 4.8 6.2 7.8 8.0 9.1 6.5 6.0 7.0 5.4 6.3 6.1 6.0 6.6 PREVAILING WIND PERCENT 3.2 4.0 8.9 10.0 12.5 9.2 8.9 10.1 10.0 9.3 7.9 6.9 7.2 CALMS PERCENT OF WIND 81.9 78.1 70.6 57.9 55.6 63.3 69.8 67.7 57.1 64.1 71.3 84.3 68.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 177 337 243 222 257 240 228 232 235 252 227 339 240 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.1 1.0 1.3 1.4 0.3 0.9 0.8 0.6 0.5 0.3 0.3 0.6 WIND STEADINESES (MEAN %) 10.0 7.1 45.5 41.9 43.7 12.0 45.0 36.4 24.0 23.8 17.6 33.3 28.6 WIND SPEED (MEAN KNOTS) 1.0 1.4 2.2 3.1 3.2 2.5 2.0 2.2 2.5 2.1 1.7 0.9 2.1 FASTEST WIND DIRECTION 360 280 290 240 210 330 360 350 330 260 340 250 240 FASTEST WIND SPEED (KNOTS) 16 14 16 29 29 19 19 19 14 16 12 14 29 DAY 26 8 18 28 12 4 17 3 14 2 11 31 DAYS WITH SKY CLEAR (0-2)/8 9 9 9 13 16 26 15 21 24 25 17 8 192 DAYS WITH P.CLOUDY (3-6)/8 8 8 13 12 9 4 16 10 6 4 10 16 116 DAYS WITH CLOUDY (7-8)/8 14 11 9 5 6 0 0 0 0 2 3 7 57 DAYS WITH VISIBILITY =< 2 KM 3 5 1 0 0 0 0 0 0 0 0 2 11 DURATION OF SUNSHINE HOURS 115.9 133.8 169.1 247.2 281.3 334.0 329.0 315.9 297.0 256.8 204.4 145.4 2829.8 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 843.2 843.8 842.9 843.9 845.0 844.5 841.2 844.1 844.9 848.4 848.7 849.5 845.0 MAX. QFE PRESSURE IN HPA 852.4 856.1 851.0 854.1 853.0 850.4 849.0 849.1 849.8 854.7 855.8 856.0 856.1 DAY-HOUR 4- 6 23- 6 27- 6 12- 9 8- 6 6- 6 20- 6 25- 6 13- 6 10- 6 21- 6 9- 6 MIN. QFE PRESSURE IN HPA 830.4 832.5 833.5 837.0 837.0 839.6 833.6 839.8 839.6 841.7 843.4 841.6 830.4 DAY-HOUR 13- 6 14- 0 18-12 24- 3 29-15 29-15 8-15 22-15 5-15 2- 0 1-12 21- 9 MEAN QNH PRESSURE IN HPA 1016.0 1016.7 1015.7 1016.9 1018.1 1017.5 1013.6 1017.1 1018.0 1022.1 1022.5 1023.3 1018.1 MAX. QNH PRESSURE IN HPA 1026.7 1031.0 1025.1 1028.7 1027.4 1024.4 1022.8 1022.9 1023.7 1029.4 1030.7 1030.9 1031.0 DAY-HOUR 4- 6 23- 6 27- 6 12- 9 8- 6 6- 6 20- 6 25- 6 13- 6 10- 6 21- 6 9- 6 MIN. QNH PRESSURE IN HPA 1001.1 1003.6 1004.8 1008.8 1008.8 1011.8 1004.9 1012.1 1011.8 1014.3 1016.3 1014.2 1001.1 DAY-HOUR 13- 6 14- 0 18-12 24- 3 29-15 29-15 8-15 22-15 5-15 2- 0 1-12 21- 9 MEAN QFF PRESSURE IN HPA 1018.9 1018.0 1013.5 1009.6 1008.5 1003.8 998.6 1002.5 1006.0 1014.3 1017.4 1020.9 1011.0 MAX. QFF PRESSURE IN HPA 1029.7 1033.5 1022.0 1020.9 1020.4 1011.5 1009.2 1008.5 1013.9 1024.9 1025.5 1029.0 1033.5 DAY-HOUR 4- 6 23- 6 4- 6 7- 0 3- 3 17- 3 20- 6 8- 6 13- 6 11- 6 21- 3 29- 6 MIN. QFF PRESSURE IN HPA 1002.9 1002.9 999.6 1000.3 998.8 995.7 988.7 997.4 998.1 1002.1 1009.0 1011.2 988.7 DAY-HOUR 13- 6 8- 0 18-15 17-15 29-18 29-15 8-15 22-18 5-12 1-18 1-12 21-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 842.8 843.4 842.5 843.8 844.7 844.2 841.0 843.9 844.8 848.2 848.6 849.4 844.8 MAX. QFE PRESSURE IN HPA 849.9 855.2 849.2 852.6 850.4 848.8 847.6 847.2 847.6 853.0 854.0 855.6 855.6 DAY 4 23 28 12 9 17 20 9 30 10 22 10 MIN. QFE PRESSURE IN HPA 831.8 832.5 835.3 837.4 837.3 840.4 834.4 841.0 839.8 841.7 844.8 842.0 831.8 DAY 13 14 30 24 30 30 8 23 6 2 11 21 MEAN QNH PRESSURE IN HPA 1015.6 1016.3 1015.2 1016.7 1017.8 1017.2 1013.5 1016.9 1017.9 1021.8 1022.3 1023.2 1017.9 MAX. QNH PRESSURE IN HPA 1023.8 1030.0 1023.0 1027.0 1024.4 1022.5 1021.2 1020.7 1021.2 1027.4 1028.6 1030.5 1030.5 DAY 4 23 28 12 9 17 20 9 30 10 22 10 MIN. QNH PRESSURE IN HPA 1002.8 1003.6 1006.8 1009.3 1009.2 1012.8 1005.8 1013.5 1012.1 1014.3 1017.9 1014.6 1002.8 DAY 13 14 30 24 30 30 8 23 6 2 11 21 MEAN QFF PRESSURE IN HPA 1018.2 1017.4 1012.9 1009.2 1008.4 1003.5 998.3 1002.1 1005.6 1013.6 1016.9 1020.3 1010.5 MAX. QFF PRESSURE IN HPA 1026.3 1033.1 1019.5 1020.9 1019.7 1010.5 1007.3 1007.4 1010.8 1023.6 1023.1 1026.4 1033.1 DAY 4 23 4 7 3 17 21 9 15 11 25 5 MIN. QFF PRESSURE IN HPA 1003.9 1002.9 1000.3 1001.4 1000.8 997.0 989.7 998.0 998.6 1002.4 1010.8 1011.5 989.7 DAY 13 8 30 22 21 30 8 18 5 2 11 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 843.0 843.4 842.9 843.9 845.2 845.2 841.8 844.7 845.4 848.5 848.8 849.4 845.2 MAX. QFE PRESSURE IN HPA 849.7 855.2 849.7 853.2 851.4 849.7 848.0 848.3 849.1 854.0 855.2 855.6 855.6 DAY 4 23 28 12 9 17 20 25 13 10 21 10 MIN. QFE PRESSURE IN HPA 830.5 832.5 834.7 837.0 837.2 841.7 834.7 841.6 840.5 842.6 844.9 841.8 830.5 DAY 13 14 30 24 30 29 8 23 5 2 17 21 MEAN QNH PRESSURE IN HPA 1015.8 1016.3 1015.7 1016.9 1018.3 1018.4 1014.4 1017.8 1018.6 1022.2 1022.6 1023.3 1018.3 MAX. QNH PRESSURE IN HPA 1023.6 1030.0 1023.6 1027.7 1025.6 1023.6 1021.6 1022.0 1022.9 1028.6 1030.0 1030.5 1030.5 DAY 4 23 28 12 9 17 20 25 13 10 21 10 MIN. QNH PRESSURE IN HPA 1001.3 1003.6 1006.1 1008.8 1009.1 1014.3 1006.1 1014.2 1012.9 1015.3 1018.0 1014.4 1001.3 DAY 13 14 30 24 30 29 8 23 5 2 17 21 MEAN QFF PRESSURE IN HPA 1019.4 1018.2 1014.2 1010.2 1009.2 1004.8 999.6 1003.6 1007.4 1015.4 1018.7 1021.8 1011.9 MAX. QFF PRESSURE IN HPA 1027.6 1032.9 1021.2 1020.1 1020.4 1011.5 1009.1 1007.8 1013.7 1024.9 1025.5 1028.2 1032.9 DAY 4 23 4 12 3 17 21 25 13 11 21 9 MIN. QFF PRESSURE IN HPA 1003.8 1003.6 1001.4 1001.5 999.7 998.2 990.4 999.9 999.5 1004.6 1012.8 1012.8 990.4 DAY 13 8 30 24 30 29 8 17 5 1 11 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 844.0 844.5 843.9 845.0 846.0 845.9 842.2 845.3 846.1 849.5 849.7 850.5 846.0 MAX. QFE PRESSURE IN HPA 852.4 856.1 851.0 854.0 853.0 850.4 849.0 849.1 849.8 854.7 855.8 856.0 856.1 DAY 4 23 27 12 8 6 20 25 13 10 21 9 MIN. QFE PRESSURE IN HPA 830.4 833.8 836.0 837.8 837.4 842.0 835.5 842.2 841.2 843.6 846.0 842.2 830.4 DAY 13 14 15 24 30 29 8 22 5 2 1 21 MEAN QNH PRESSURE IN HPA 1016.9 1017.6 1016.9 1018.1 1019.3 1019.1 1014.9 1018.5 1019.4 1023.4 1023.6 1024.5 1019.3 MAX. QNH PRESSURE IN HPA 1026.7 1031.0 1025.1 1028.6 1027.4 1024.4 1022.8 1022.9 1023.7 1029.4 1030.7 1030.9 1031.0 DAY 4 23 27 12 8 6 20 25 13 10 21 9 MIN. QNH PRESSURE IN HPA 1001.1 1005.1 1007.7 1009.7 1009.3 1014.6 1007.1 1014.9 1013.7 1016.5 1019.3 1014.9 1001.1 DAY 13 14 15 24 30 29 8 22 5 2 1 21 MEAN QFF PRESSURE IN HPA 1019.8 1018.9 1014.6 1010.8 1009.6 1005.4 999.8 1003.8 1007.3 1015.5 1018.4 1022.1 1012.2 MAX. QFF PRESSURE IN HPA 1029.7 1033.5 1022.0 1020.1 1020.0 1010.9 1009.2 1008.5 1013.9 1024.9 1025.0 1029.0 1033.5 DAY 4 23 4 7 3 17 20 8 13 11 21 29 MIN. QFF PRESSURE IN HPA 1002.9 1005.2 1003.3 1002.5 999.2 998.5 991.0 999.7 999.7 1004.7 1011.9 1012.6 991.0 DAY 13 8 18 24 30 29 5 22 3 1 1 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 843.6 844.1 843.5 844.5 845.5 845.2 841.7 844.7 845.4 848.8 849.0 849.6 845.5 MAX. QFE PRESSURE IN HPA 851.4 855.0 850.0 854.1 852.0 849.8 847.7 848.3 848.8 853.7 854.8 855.8 855.8 DAY 4 23 28 12 8 6 20 25 12 9 21 29 MIN. QFE PRESSURE IN HPA 830.4 834.2 835.4 839.0 837.5 841.7 835.2 841.4 841.0 843.1 844.8 841.6 830.4 DAY 13 14 15 21 30 29 5 22 6 1 1 21 MEAN QNH PRESSURE IN HPA 1016.5 1017.1 1016.4 1017.5 1018.7 1018.4 1014.3 1017.8 1018.6 1022.5 1022.7 1023.4 1018.7 MAX. QNH PRESSURE IN HPA 1025.6 1029.8 1023.9 1028.7 1026.3 1023.7 1021.3 1022.0 1022.5 1028.2 1029.5 1030.7 1030.7 DAY 4 23 28 12 8 6 20 25 12 9 21 29 MIN. QNH PRESSURE IN HPA 1001.1 1005.6 1007.0 1011.1 1009.4 1014.3 1006.7 1013.9 1013.5 1015.9 1017.9 1014.2 1001.1 DAY 13 14 15 21 30 29 5 22 6 1 1 21 MEAN QFF PRESSURE IN HPA 1018.9 1018.1 1013.9 1010.0 1009.0 1004.6 999.2 1002.9 1006.3 1014.3 1017.1 1020.5 1011.2 MAX. QFF PRESSURE IN HPA 1027.6 1031.3 1021.0 1020.5 1020.0 1009.7 1007.3 1007.9 1012.5 1023.6 1023.7 1028.3 1031.3 DAY 4 23 4 7 3 17 20 9 13 10 21 29 MIN. QFF PRESSURE IN HPA 1004.5 1005.8 1002.4 1002.7 1000.6 998.2 990.3 998.8 999.1 1003.6 1010.5 1011.7 990.3 DAY 13 8 15 17 30 29 5 22 3 1 1 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 842.7 843.2 842.3 843.4 844.6 843.9 840.6 843.6 844.1 847.5 848.0 848.7 844.4 MAX. QFE PRESSURE IN HPA 849.5 853.6 849.0 853.0 851.0 848.3 846.6 846.5 848.0 852.7 853.8 854.8 854.8 DAY 4 23 27 12 8 6 21 9 12 9 21 29 MIN. QFE PRESSURE IN HPA 830.6 833.9 833.5 837.4 837.6 840.2 834.5 840.8 840.2 842.2 843.4 842.0 830.6 DAY 13 13 18 21 30 29 8 22 5 1 1 21 MEAN QNH PRESSURE IN HPA 1015.4 1016.0 1014.9 1016.3 1017.6 1016.9 1013.0 1016.5 1017.1 1021.0 1021.6 1022.4 1017.4 MAX. QNH PRESSURE IN HPA 1023.4 1028.1 1022.8 1027.4 1025.1 1022.0 1020.0 1019.9 1021.6 1027.1 1028.4 1029.5 1029.5 DAY 4 23 27 12 8 6 21 9 12 9 21 29 MIN. QNH PRESSURE IN HPA 1001.4 1005.2 1004.8 1009.3 1009.5 1012.5 1005.9 1013.2 1012.5 1014.9 1016.3 1014.6 1001.4 DAY 13 13 18 21 30 29 8 22 5 1 1 21 MEAN QFF PRESSURE IN HPA 1018.0 1017.1 1012.4 1008.7 1008.2 1003.2 997.7 1001.5 1004.9 1012.9 1016.2 1019.5 1010.0 MAX. QFF PRESSURE IN HPA 1026.4 1029.9 1020.6 1018.1 1017.0 1008.8 1007.0 1006.6 1010.8 1022.5 1022.8 1027.1 1029.9 DAY 22 23 4 12 3 17 21 9 12 10 25 29 MIN. QFF PRESSURE IN HPA 1004.8 1004.9 1000.2 1001.2 999.5 996.7 989.9 997.8 998.1 1002.5 1009.0 1011.2 989.9 DAY 13 8 18 17 21 29 8 21 5 1 1 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 843.1 843.5 842.4 843.2 844.0 843.4 840.0 843.0 843.9 847.8 848.3 849.2 844.3 MAX. QFE PRESSURE IN HPA 850.1 853.3 849.0 852.2 850.0 848.1 845.6 845.8 847.6 853.3 854.4 854.8 854.8 DAY 4 22 27 12 8 6 20 9 12 9 21 9 MIN. QFE PRESSURE IN HPA 831.6 833.7 833.5 837.4 837.0 839.6 833.6 839.8 839.6 842.2 843.4 842.4 831.6 DAY 13 13 18 21 29 29 8 22 5 2 10 21 MEAN QNH PRESSURE IN HPA 1015.9 1016.4 1015.1 1016.0 1017.0 1016.3 1012.3 1015.9 1016.9 1021.4 1021.9 1023.0 1017.3 MAX. QNH PRESSURE IN HPA 1024.1 1027.8 1022.8 1026.5 1023.9 1021.7 1018.8 1019.1 1021.2 1027.8 1029.1 1029.5 1029.5 DAY 4 22 27 12 8 6 20 9 12 9 21 9 MIN. QNH PRESSURE IN HPA 1002.5 1005.0 1004.8 1009.3 1008.8 1011.8 1004.9 1012.1 1011.8 1014.9 1016.3 1015.1 1002.5 DAY 13 13 18 21 29 29 8 22 5 2 10 21 MEAN QFF PRESSURE IN HPA 1019.5 1018.3 1013.4 1009.2 1007.8 1002.8 997.5 1001.6 1005.7 1014.4 1018.0 1021.4 1010.8 MAX. QFF PRESSURE IN HPA 1027.3 1030.3 1021.6 1018.3 1017.9 1009.0 1006.4 1005.7 1011.9 1023.4 1024.5 1028.5 1030.3 DAY 4 22 4 12 2 16 21 9 13 10 21 29 MIN. QFF PRESSURE IN HPA 1006.8 1005.7 999.6 1000.3 998.8 995.7 988.7 997.8 998.4 1004.1 1011.8 1012.3 988.7 DAY 13 8 18 17 29 29 8 17 5 1 10 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 843.5 844.1 843.2 843.9 844.7 844.1 841.0 843.9 844.8 848.5 848.8 849.7 845.0 MAX. QFE PRESSURE IN HPA 849.9 855.2 849.8 852.6 850.6 848.4 846.8 846.5 848.9 853.9 854.4 855.6 855.6 DAY 3 22 28 12 8 6 20 29 12 9 21 9 MIN. QFE PRESSURE IN HPA 834.2 833.7 834.0 838.0 837.7 840.2 834.4 840.3 840.0 841.9 844.2 844.0 833.7 DAY 12 13 18 21 29 29 8 22 5 1 10 31 MEAN QNH PRESSURE IN HPA 1016.4 1017.1 1016.0 1016.9 1017.8 1017.0 1013.4 1016.8 1017.9 1022.2 1022.6 1023.6 1018.1 MAX. QNH PRESSURE IN HPA 1023.8 1030.0 1023.7 1027.0 1024.6 1022.1 1020.2 1019.9 1022.7 1028.5 1029.1 1030.5 1030.5 DAY 3 22 28 12 8 6 20 29 12 9 21 9 MIN. QNH PRESSURE IN HPA 1005.6 1005.0 1005.3 1010.0 1009.6 1012.5 1005.8 1012.7 1012.3 1014.5 1017.2 1017.0 1005.0 DAY 12 13 18 21 29 29 8 22 5 1 10 31 MEAN QFF PRESSURE IN HPA 1019.1 1018.5 1013.6 1009.4 1008.1 1003.2 998.3 1002.1 1005.8 1014.3 1017.3 1021.2 1010.9 MAX. QFF PRESSURE IN HPA 1026.9 1032.0 1020.7 1018.1 1019.2 1008.8 1006.7 1006.5 1013.0 1024.5 1024.4 1027.7 1032.0 DAY 22 22 21 6 2 16 20 9 12 10 21 29 MIN. QFF PRESSURE IN HPA 1007.7 1006.3 999.9 1000.9 998.8 997.0 989.7 997.4 998.2 1002.1 1010.8 1014.4 989.7 DAY 12 8 18 17 29 29 8 22 5 1 10 31 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 843.3 843.9 843.0 844.0 845.0 844.2 841.1 844.1 844.8 848.5 848.8 849.5 845.0 MAX. QFE PRESSURE IN HPA 849.9 855.2 849.2 852.6 850.8 848.4 847.2 848.6 848.7 854.2 854.4 855.6 855.6 DAY 3 22 27 11 8 6 19 2 12 9 21 9 MIN. QFE PRESSURE IN HPA 833.9 833.0 835.4 838.0 838.8 840.7 834.8 840.6 840.1 842.0 844.9 843.8 833.0 DAY 12 15 18 21 29 29 8 22 5 1 1 20 MEAN QNH PRESSURE IN HPA 1016.1 1016.9 1015.8 1017.0 1018.1 1017.2 1013.6 1017.1 1017.9 1022.2 1022.5 1023.4 1018.1 MAX. QNH PRESSURE IN HPA 1023.8 1030.0 1023.0 1027.0 1024.9 1022.1 1020.7 1022.3 1022.4 1028.8 1029.1 1030.5 1030.5 DAY 3 22 27 11 8 6 19 2 12 9 21 9 MIN. QNH PRESSURE IN HPA 1005.2 1004.2 1007.0 1010.0 1010.9 1013.1 1006.3 1013.0 1012.4 1014.6 1018.0 1016.7 1004.2 DAY 12 15 18 21 29 29 8 22 5 1 1 20 MEAN QFF PRESSURE IN HPA 1018.5 1018.0 1013.2 1009.4 1008.2 1003.3 998.4 1002.3 1005.6 1014.0 1016.9 1020.5 1010.7 MAX. QFF PRESSURE IN HPA 1026.3 1031.0 1020.5 1020.6 1019.4 1009.0 1006.7 1008.4 1013.0 1024.6 1023.8 1026.8 1031.0 DAY 3 22 21 6 2 16 20 2 12 10 24 4 MIN. QFF PRESSURE IN HPA 1006.9 1004.5 1003.4 1001.2 999.4 997.4 989.9 997.7 998.7 1002.5 1010.8 1013.3 989.9 DAY 12 7 18 17 21 28 8 17 4 1 1 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.0 7.3 8.4 15.0 21.5 26.8 26.6 28.1 23.2 17.4 7.8 5.4 15.9 MINIMUN AIR TEMPERATURE (C) -0.2 3.2 4.0 9.8 15.5 20.2 20.7 22.1 17.4 12.3 4.0 1.7 10.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 9 16 27 2 0 0 0 55 DAYS WITH MINIMUM TEMP. <=-4 4 1 0 0 0 0 0 0 0 0 0 0 5 DAYS WITH FREEZING MIN.<= 0 18 4 3 0 0 0 0 0 0 0 4 7 36 TEMPERATURE RECORDS LOWEST(C) -5.0 -4.0 -2.4 3.8 8.6 17.8 15.6 18.0 10.6 6.0 -2.6 -2.0 -5.0 DAY 4 22 19 10 22 6 15 31 28 28 30 1 MAXIMUM AIR TEMPERATURE (C) 7.1 12.0 13.0 20.1 27.1 32.5 32.2 33.8 29.3 23.4 12.2 9.8 21.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 7 29 22 31 17 0 0 0 106 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 10.6 17.6 19.4 25.6 33.6 36.0 37.6 36.0 33.6 28.0 18.2 16.6 37.6 DAY 30 28 26 30 31 28 4 1 15 6 20 31 DIF. BETWEEN (MAX.-MIN.) (C) 7.3 8.8 9.0 10.3 11.6 12.3 11.5 11.7 11.9 11.1 8.2 8.1 10.1 MEAN DAILY TEMP. (MDT) (C) 3.4 7.6 8.5 15.0 21.3 26.3 26.4 27.9 23.3 17.9 8.1 5.7 16.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 43.7 160.4 168.8 215.0 85.8 1.4 0.0 0.0 675.1 HEATING DEG. DAYS(BASE 18 0C) 451.7 291.2 295.1 95.0 6.4 0.0 0.0 0.0 2.6 43.1 296.0 380.0 1861.1 DEWPOINT (MEAN C) -2.8 -4.1 -3.3 0.9 4.3 8.8 8.9 8.8 7.0 3.9 3.0 -0.6 2.9 MIXING RATIO (G/KG) 3.81 3.54 3.71 5.10 6.29 8.60 8.74 8.52 7.55 6.06 5.92 4.39 6.02 VAPOUR PRESSURE (HPA) 5.15 4.78 5.00 6.87 8.45 11.47 11.64 11.39 10.12 8.18 7.97 5.96 8.08 SATURATION DEF. (HPA) 2.61 5.73 6.43 10.62 18.16 24.65 24.34 27.35 19.47 12.59 2.92 3.20 13.17 RELATIVE HUMIDITY (MEAN %) 68 48 49 41 34 33 36 31 37 44 75 68 47 RELATIVE HUMIDITY (MAX. %) 82 66 65 59 48 44 52 42 49 58 86 81 61 RELATIVE HUMIDITY (MIN. %) 51 33 33 29 24 25 23 22 26 30 61 51 34 RELATIVE HUMIDITY (MEAN% 03UTC) 78 56 57 55 45 43 50 41 47 54 83 78 57 RELATIVE HUMIDITY (MEAN% 09UTC) 57 40 40 34 28 30 28 24 28 34 65 55 39 RELATIVE HUMIDITY (MEAN% 15UTC) 65 43 44 33 28 28 27 26 33 40 74 67 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 85.0 35.6 69.4 15.2 1.4 0.1 15.1 0.0 0.0 20.1 65.2 34.2 341.3 DAYS WITH PRECIPITATION >=10 3 2 3 0 0 0 0 0 0 1 4 1 14 DAYS WITH PRECIPITATION >= 5 3 3 4 1 0 0 1 0 0 2 4 3 21 DAYS WITH PRECIPITATION >= 1 7 4 9 3 1 0 4 0 0 3 4 5 40 DAYS WITH PRECIPITATION 11 7 10 8 3 1 5 1 1 5 6 7 65 GREATEST DAILY PRECIPITATION 35.0 15.0 25.0 7.6 1.1 0.1 5.0 0.0 0.0 13.1 25.0 12.0 35.0 DAY 9 8 21 22 10 17 26 ** ** 27 11 10 DAY WITH THUNDER STORM 1 0 1 2 0 0 2 0 0 0 1 0 7 DAYS WITH SNOW OR SLEET 6 2 1 0 0 0 0 0 0 0 2 2 13 DAYS WITH DUST 1 0 0 0 2 0 0 1 0 0 1 0 5 WIND DIRECTION (PREVAILING) 180 180 180 225 225 225 225 360 225 180 180 45 225 PREVAILING WIND SPEED(KNOTS) 5.9 6.3 5.9 6.7 7.0 7.0 6.3 7.4 6.8 6.3 5.6 4.3 6.5 PREVAILING WIND PERCENT 5.6 13.4 9.7 14.2 14.1 15.0 11.3 12.5 11.7 9.7 8.3 7.3 9.5 CALMS PERCENT OF WIND 83.5 55.4 62.5 52.9 55.2 51.3 62.9 56.5 58.3 59.3 66.7 80.2 62.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 194 228 222 235 229 243 226 285 225 238 211 136 232 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.6 0.5 1.0 1.1 1.2 0.7 0.6 0.9 0.7 0.6 0.1 0.7 WIND STEADINESES (MEAN %) 30.0 21.4 21.7 32.3 39.3 38.7 31.8 20.7 36.0 29.2 31.6 11.1 30.4 WIND SPEED (MEAN KNOTS) 1.0 2.8 2.3 3.1 2.8 3.1 2.2 2.9 2.5 2.4 1.9 0.9 2.3 FASTEST WIND DIRECTION 330 290 350 240 280 220 30 360 220 360 260 240 350 FASTEST WIND SPEED (KNOTS) 10 16 19 19 17 16 12 14 12 14 14 10 19 DAY 10 4 16 6 7 6 12 5 1 7 28 14 DAYS WITH SKY CLEAR (0-2)/8 13 14 10 10 23 25 23 23 29 23 10 15 218 DAYS WITH P.CLOUDY (3-6)/8 7 10 14 19 7 4 6 8 0 6 13 7 101 DAYS WITH CLOUDY (7-8)/8 11 4 7 1 1 1 2 0 1 2 7 9 46 DAYS WITH VISIBILITY =< 2 KM 4 1 0 0 0 0 0 0 0 1 1 3 10 DURATION OF SUNSHINE HOURS 135.9 201.1 191.1 261.4 324.6 335.6 326.7 316.8 308.1 258.0 175.2 147.6 2982.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 846.0 843.8 842.8 844.0 843.8 841.4 840.7 843.4 844.0 847.1 847.0 850.0 844.5 MAX. QFE PRESSURE IN HPA 857.0 852.0 849.8 849.0 850.7 847.4 846.9 850.2 850.0 852.0 854.4 856.6 857.0 DAY-HOUR 2- 6 12- 6 31- 6 23- 6 28- 6 9- 6 19- 6 20- 6 30- 6 26-21 30-21 6- 6 MIN. QFE PRESSURE IN HPA 837.4 834.0 837.3 834.2 834.2 833.2 836.6 839.1 838.8 842.4 839.8 842.5 833.2 DAY-HOUR 9-12 20-18 3- 0 8-15 20-15 25-12 22-15 14-15 16-12 31-15 26- 9 15-21 MEAN QNH PRESSURE IN HPA 1019.3 1016.7 1015.6 1017.0 1016.8 1013.9 1013.1 1016.3 1017.0 1020.5 1020.4 1023.9 1017.5 MAX. QNH PRESSURE IN HPA 1032.1 1026.3 1023.7 1022.8 1024.8 1020.9 1020.3 1024.2 1023.9 1026.3 1029.1 1031.6 1032.1 DAY-HOUR 2- 6 12- 6 31- 6 23- 6 28- 6 9- 6 19- 6 20- 6 30- 6 26-21 30-21 6- 6 MIN. QNH PRESSURE IN HPA 1009.3 1005.3 1009.2 1005.6 1005.6 1004.4 1008.4 1011.3 1010.9 1015.1 1012.1 1015.2 1004.4 DAY-HOUR 9-12 20-18 3- 0 8-15 20-15 25-12 22-15 14-15 16-12 31-15 26- 9 15-21 MEAN QFF PRESSURE IN HPA 1020.5 1015.0 1013.1 1010.2 1005.9 999.7 998.9 1001.4 1004.9 1012.2 1018.2 1023.6 1010.3 MAX. QFF PRESSURE IN HPA 1036.0 1025.4 1025.3 1018.4 1013.0 1008.0 1006.3 1010.2 1016.2 1024.4 1031.8 1033.1 1036.0 DAY-HOUR 2- 6 12- 6 19- 6 23- 6 24- 3 9- 6 19- 3 20- 6 30- 3 26-21 30-18 6- 6 MIN. QFF PRESSURE IN HPA 1007.4 1002.7 1004.9 997.9 993.4 989.3 992.7 996.2 996.5 1006.2 1007.6 1012.0 989.3 DAY-HOUR 9-12 20-18 26-18 8-15 20-15 25-12 4-15 13-12 16-12 12-21 26- 9 16- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 846.0 843.7 842.4 844.0 843.7 841.3 840.6 843.3 843.8 847.0 846.7 849.7 844.3 MAX. QFE PRESSURE IN HPA 853.9 850.4 848.0 848.2 849.6 846.1 846.0 848.2 848.3 850.3 851.6 856.4 856.4 DAY 3 12 31 26 28 1 19 20 30 27 18 6 MIN. QFE PRESSURE IN HPA 840.0 834.1 837.3 836.3 837.6 834.0 837.4 840.3 839.8 843.2 841.1 842.5 834.0 DAY 19 21 3 9 21 25 23 14 16 31 26 16 MEAN QNH PRESSURE IN HPA 1019.3 1016.6 1015.1 1017.0 1016.6 1013.8 1013.0 1016.2 1016.7 1020.4 1020.1 1023.6 1017.4 MAX. QNH PRESSURE IN HPA 1028.5 1024.4 1021.6 1021.8 1023.5 1019.4 1019.3 1021.8 1022.0 1024.3 1025.8 1031.4 1031.4 DAY 3 12 31 26 28 1 19 20 30 27 18 6 MIN. QNH PRESSURE IN HPA 1012.3 1005.4 1009.2 1008.0 1009.5 1005.3 1009.3 1012.7 1012.1 1016.0 1013.6 1015.2 1005.3 DAY 19 21 3 9 21 25 23 14 16 31 26 16 MEAN QFF PRESSURE IN HPA 1020.1 1014.6 1012.5 1010.1 1005.8 999.7 998.7 1001.1 1004.3 1011.7 1017.4 1023.1 1009.9 MAX. QFF PRESSURE IN HPA 1033.1 1023.0 1022.9 1016.6 1011.8 1006.2 1005.1 1006.2 1013.6 1022.0 1026.9 1032.4 1033.1 DAY 3 12 19 11 24 9 28 20 29 27 30 6 MIN. QFF PRESSURE IN HPA 1012.4 1003.6 1006.9 1001.2 998.1 991.1 993.6 997.1 997.2 1006.8 1008.5 1012.0 991.1 DAY 10 21 27 9 20 25 23 14 16 19 1 16 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 845.9 843.9 842.8 844.3 844.4 842.1 841.2 844.1 844.3 847.5 846.9 849.9 844.8 MAX. QFE PRESSURE IN HPA 855.1 850.8 849.0 848.5 850.3 846.7 846.7 849.8 849.8 850.4 852.1 855.2 855.2 DAY 2 12 31 23 28 9 19 20 30 27 14 6 MIN. QFE PRESSURE IN HPA 839.8 835.8 837.7 838.1 838.5 835.0 838.3 840.8 839.2 844.2 840.3 843.7 835.0 DAY 19 6 3 9 21 25 23 14 16 25 26 16 MEAN QNH PRESSURE IN HPA 1019.2 1016.8 1015.6 1017.3 1017.4 1014.8 1013.7 1017.0 1017.4 1021.0 1020.3 1023.8 1017.9 MAX. QNH PRESSURE IN HPA 1029.9 1024.9 1022.8 1022.2 1024.3 1020.1 1020.1 1023.7 1023.7 1024.4 1026.4 1030.0 1030.0 DAY 2 12 31 23 28 9 19 20 30 27 14 6 MIN. QNH PRESSURE IN HPA 1012.1 1007.4 1009.6 1010.1 1010.6 1006.5 1010.3 1013.2 1011.4 1017.2 1012.7 1016.6 1006.5 DAY 19 6 3 9 21 25 23 14 16 25 26 16 MEAN QFF PRESSURE IN HPA 1021.0 1015.8 1013.8 1011.2 1007.1 1000.9 999.8 1002.7 1006.1 1013.6 1018.9 1024.5 1011.3 MAX. QFF PRESSURE IN HPA 1033.2 1024.9 1024.8 1017.9 1013.0 1007.1 1006.3 1009.4 1016.2 1022.0 1029.6 1032.8 1033.2 DAY 3 12 19 11 24 9 19 20 30 27 30 6 MIN. QFF PRESSURE IN HPA 1011.8 1006.8 1008.1 1004.7 998.7 992.5 994.8 998.3 997.5 1009.3 1008.6 1014.9 992.5 DAY 9 21 12 14 20 25 23 14 16 19 26 16 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 846.7 844.8 843.8 845.1 844.9 842.8 841.8 844.7 845.2 848.3 847.9 850.9 845.6 MAX. QFE PRESSURE IN HPA 857.0 852.0 849.8 849.0 850.7 847.4 846.9 850.2 850.0 851.2 853.7 856.6 857.0 DAY 2 12 31 23 28 9 19 20 30 26 30 6 MIN. QFE PRESSURE IN HPA 840.2 836.7 838.4 839.0 838.0 834.6 838.6 840.9 840.1 844.6 840.6 844.9 834.6 DAY 9 21 3 14 20 25 14 14 16 31 26 15 MEAN QNH PRESSURE IN HPA 1020.1 1017.9 1016.8 1018.3 1018.0 1015.5 1014.4 1017.8 1018.4 1022.0 1021.5 1025.0 1018.8 MAX. QNH PRESSURE IN HPA 1032.1 1026.3 1023.7 1022.8 1024.8 1020.9 1020.3 1024.2 1023.9 1025.3 1028.2 1031.6 1032.1 DAY 2 12 31 23 28 9 19 20 30 26 30 6 MIN. QNH PRESSURE IN HPA 1012.5 1008.5 1010.4 1011.1 1010.0 1006.0 1010.7 1013.4 1012.4 1017.7 1013.0 1018.0 1006.0 DAY 9 21 3 14 20 25 14 14 16 31 26 15 MEAN QFF PRESSURE IN HPA 1021.4 1016.4 1014.1 1011.5 1007.1 1001.1 1000.2 1002.7 1006.2 1013.5 1019.2 1024.8 1011.5 MAX. QFF PRESSURE IN HPA 1036.0 1025.4 1025.3 1018.4 1012.8 1008.0 1006.2 1010.2 1015.7 1022.0 1031.0 1033.1 1036.0 DAY 2 12 19 23 23 9 28 20 29 27 30 6 MIN. QFF PRESSURE IN HPA 1011.5 1007.7 1009.0 1002.7 997.2 991.2 995.2 998.3 998.6 1009.6 1009.6 1016.1 991.2 DAY 9 21 22 14 20 25 23 14 16 13 26 16 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 846.1 844.3 843.4 844.6 844.4 842.1 841.3 843.9 844.6 847.5 847.1 850.2 844.9 MAX. QFE PRESSURE IN HPA 856.2 851.2 849.4 848.4 849.4 846.3 845.3 849.2 849.8 851.4 853.2 856.0 856.2 DAY 2 12 31 1 27 9 19 20 30 26 14 6 MIN. QFE PRESSURE IN HPA 839.2 836.4 837.9 838.4 837.5 833.9 838.6 840.5 839.7 844.0 839.8 844.2 833.9 DAY 9 20 3 8 20 25 14 14 16 31 26 15 MEAN QNH PRESSURE IN HPA 1019.4 1017.3 1016.2 1017.6 1017.4 1014.7 1013.8 1016.9 1017.7 1021.0 1020.6 1024.1 1018.1 MAX. QNH PRESSURE IN HPA 1031.2 1025.3 1023.2 1022.1 1023.2 1019.6 1018.5 1023.0 1023.7 1025.6 1027.7 1030.9 1031.2 DAY 2 12 31 1 27 9 19 20 30 26 14 6 MIN. QNH PRESSURE IN HPA 1011.4 1008.1 1009.9 1010.4 1009.4 1005.2 1010.7 1012.9 1012.0 1017.0 1012.1 1017.2 1005.2 DAY 9 20 3 8 20 25 14 14 16 31 26 15 MEAN QFF PRESSURE IN HPA 1020.1 1015.2 1013.5 1010.6 1006.3 1000.2 999.6 1001.8 1005.4 1012.3 1017.8 1023.3 1010.5 MAX. QFF PRESSURE IN HPA 1034.8 1023.7 1024.9 1017.4 1012.0 1006.8 1005.4 1008.7 1014.9 1022.7 1029.5 1031.3 1034.8 DAY 2 12 19 11 12 9 28 20 29 26 30 6 MIN. QFF PRESSURE IN HPA 1010.5 1005.4 1009.1 1002.8 996.8 990.2 995.3 997.7 997.6 1007.6 1007.6 1015.6 990.2 DAY 9 20 3 8 20 25 23 13 16 19 26 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 845.2 843.0 842.2 843.3 843.1 840.9 840.1 842.8 843.3 846.3 846.3 849.3 843.8 MAX. QFE PRESSURE IN HPA 854.8 849.6 848.4 846.7 847.9 844.9 843.2 847.3 848.8 851.0 852.4 854.7 854.8 DAY 2 12 31 11 27 9 28 20 30 26 14 6 MIN. QFE PRESSURE IN HPA 837.4 836.2 837.5 835.4 834.9 833.2 837.9 839.5 838.8 842.6 840.5 842.6 833.2 DAY 9 20 3 8 20 25 22 14 16 31 26 15 MEAN QNH PRESSURE IN HPA 1018.3 1015.8 1014.8 1016.1 1015.9 1013.4 1012.4 1015.6 1016.2 1019.7 1019.6 1023.2 1016.7 MAX. QNH PRESSURE IN HPA 1029.5 1023.5 1022.1 1020.1 1021.5 1018.0 1016.0 1020.8 1022.5 1025.1 1026.7 1029.4 1029.5 DAY 2 12 31 11 27 9 28 20 30 26 14 6 MIN. QNH PRESSURE IN HPA 1009.3 1007.9 1009.4 1007.0 1006.4 1004.4 1009.9 1011.7 1010.9 1015.3 1012.9 1015.3 1004.4 DAY 9 20 3 8 20 25 22 14 16 31 26 15 MEAN QFF PRESSURE IN HPA 1019.0 1013.7 1012.2 1009.1 1005.0 999.1 998.1 1000.5 1003.8 1011.0 1017.0 1022.6 1009.3 MAX. QFF PRESSURE IN HPA 1033.5 1021.2 1021.5 1015.1 1011.0 1004.6 1003.7 1005.5 1013.2 1022.3 1029.6 1030.1 1033.5 DAY 2 12 19 11 23 9 28 20 30 26 30 6 MIN. QFF PRESSURE IN HPA 1007.4 1004.8 1005.5 998.7 993.8 989.3 993.8 996.2 996.5 1006.7 1007.8 1013.5 989.3 DAY 9 20 26 8 20 25 4 13 16 13 1 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 845.8 843.2 842.2 843.0 842.7 840.2 839.5 842.4 843.1 846.4 846.8 849.9 843.8 MAX. QFE PRESSURE IN HPA 854.6 849.9 847.8 846.8 847.5 844.2 842.9 847.1 848.4 850.1 853.3 854.8 854.8 DAY 2 12 31 11 27 9 18 20 30 26 30 5 MIN. QFE PRESSURE IN HPA 840.0 834.5 837.7 834.2 834.2 833.2 836.6 839.1 839.3 842.4 841.5 843.0 833.2 DAY 9 20 3 8 20 25 22 14 11 31 25 15 MEAN QNH PRESSURE IN HPA 1019.0 1016.1 1014.9 1015.8 1015.5 1012.6 1011.7 1015.1 1015.9 1019.7 1020.2 1023.8 1016.7 MAX. QNH PRESSURE IN HPA 1029.3 1023.8 1021.4 1020.2 1021.0 1017.2 1015.7 1020.6 1022.1 1024.1 1027.8 1029.5 1029.5 DAY 2 12 31 11 27 9 18 20 30 26 30 5 MIN. QNH PRESSURE IN HPA 1012.3 1005.9 1009.6 1005.6 1005.6 1004.4 1008.4 1011.3 1011.5 1015.1 1014.1 1015.8 1004.4 DAY 9 20 3 8 20 25 22 14 11 31 25 15 MEAN QFF PRESSURE IN HPA 1020.9 1015.0 1013.0 1009.5 1005.1 998.6 997.8 1000.7 1004.5 1012.3 1018.8 1024.3 1010.0 MAX. QFF PRESSURE IN HPA 1033.3 1023.4 1022.2 1016.5 1010.7 1004.7 1003.5 1007.0 1014.5 1021.0 1031.8 1032.1 1033.3 DAY 2 12 18 11 24 16 28 20 30 26 30 6 MIN. QFF PRESSURE IN HPA 1011.7 1003.3 1005.0 997.9 993.4 989.8 992.7 996.5 997.4 1007.4 1010.0 1015.3 989.8 DAY 9 20 26 8 20 25 4 14 15 18 1 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 846.4 843.8 842.9 843.9 843.8 840.9 840.3 843.3 843.8 846.9 847.2 850.2 844.5 MAX. QFE PRESSURE IN HPA 855.6 850.4 847.8 848.2 849.2 845.0 844.2 848.6 848.8 851.4 854.2 855.8 855.8 DAY 2 11 31 22 27 9 18 20 30 26 30 5 MIN. QFE PRESSURE IN HPA 840.0 834.0 838.2 835.2 836.3 834.2 837.6 839.6 839.6 843.1 841.7 842.6 834.0 DAY 9 20 21 8 20 25 22 13 15 31 25 15 MEAN QNH PRESSURE IN HPA 1019.8 1016.8 1015.7 1016.9 1016.7 1013.3 1012.7 1016.1 1016.8 1020.4 1020.7 1024.2 1017.5 MAX. QNH PRESSURE IN HPA 1030.5 1024.4 1021.4 1021.8 1023.0 1018.1 1017.2 1022.3 1022.5 1025.6 1028.8 1030.7 1030.7 DAY 2 11 31 22 27 9 18 20 30 26 30 5 MIN. QNH PRESSURE IN HPA 1012.3 1005.3 1010.2 1006.7 1008.0 1005.6 1009.5 1011.8 1011.8 1015.9 1014.3 1015.3 1005.3 DAY 9 20 21 8 20 25 22 13 15 31 25 15 MEAN QFF PRESSURE IN HPA 1021.1 1015.2 1013.0 1010.0 1005.6 999.0 998.5 1000.9 1004.6 1011.9 1018.5 1023.8 1010.2 MAX. QFF PRESSURE IN HPA 1034.8 1023.6 1022.0 1017.0 1011.7 1005.7 1004.1 1008.0 1013.8 1022.4 1031.8 1032.4 1034.8 DAY 2 11 18 10 23 8 28 20 29 26 30 5 MIN. QFF PRESSURE IN HPA 1012.0 1002.7 1004.9 999.5 995.2 990.6 993.6 996.8 997.9 1006.9 1010.5 1013.2 990.6 DAY 9 20 26 8 20 25 23 13 15 12 25 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 846.4 843.8 842.9 844.1 843.8 841.0 840.6 843.3 844.0 846.9 847.2 849.9 844.5 MAX. QFE PRESSURE IN HPA 854.9 850.4 848.4 848.2 849.2 845.1 844.9 848.3 849.2 852.0 854.4 856.2 856.2 DAY 2 11 30 11 27 8 18 19 30 26 30 5 MIN. QFE PRESSURE IN HPA 839.6 834.0 837.7 836.1 837.6 834.4 837.6 839.6 839.6 842.7 841.3 842.5 834.0 DAY 9 20 21 8 20 25 22 13 15 31 25 15 MEAN QNH PRESSURE IN HPA 1019.7 1016.7 1015.7 1017.0 1016.8 1013.5 1013.0 1016.1 1017.0 1020.4 1020.7 1023.8 1017.5 MAX. QNH PRESSURE IN HPA 1029.6 1024.4 1022.1 1021.8 1023.0 1018.2 1018.0 1022.0 1023.0 1026.3 1029.1 1031.2 1031.2 DAY 2 11 30 11 27 8 18 19 30 26 30 5 MIN. QNH PRESSURE IN HPA 1011.8 1005.3 1009.6 1007.8 1009.5 1005.8 1009.5 1011.8 1011.8 1015.5 1013.8 1015.2 1005.3 DAY 9 20 21 8 20 25 22 13 15 31 25 15 MEAN QFF PRESSURE IN HPA 1020.5 1014.6 1012.9 1010.0 1005.6 999.1 998.7 1001.0 1004.7 1011.8 1018.1 1022.9 1010.0 MAX. QFF PRESSURE IN HPA 1033.9 1023.4 1023.3 1017.4 1011.5 1005.5 1005.0 1007.3 1014.1 1024.4 1031.8 1032.0 1033.9 DAY 2 11 18 10 23 8 27 19 28 26 30 5 MIN. QFF PRESSURE IN HPA 1011.4 1002.9 1007.1 1000.1 997.2 990.0 993.6 996.7 997.2 1006.2 1008.7 1012.4 990.0 DAY 9 20 26 8 20 25 23 13 15 12 25 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.7 4.3 8.5 17.9 22.9 26.2 27.9 27.8 24.4 15.0 7.3 4.6 15.8 MINIMUN AIR TEMPERATURE (C) -0.8 -0.0 3.8 12.6 16.6 19.7 21.7 21.8 18.9 10.5 3.9 1.6 10.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 12 15 25 7 0 0 0 60 DAYS WITH MINIMUM TEMP. <=-4 5 2 0 0 0 0 0 0 0 0 0 0 7 DAYS WITH FREEZING MIN.<= 0 20 16 4 0 0 0 0 0 0 0 3 8 51 TEMPERATURE RECORDS LOWEST(C) -8.4 -5.0 -3.2 7.6 11.0 12.2 17.4 17.8 13.6 7.0 -2.0 -1.4 -8.4 DAY 18 10 16 1 2 14 20 13 26 6 11 13 MAXIMUM AIR TEMPERATURE (C) 7.1 8.9 13.5 23.2 28.6 32.0 33.6 33.9 30.4 20.2 11.5 8.1 20.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 9 23 31 31 16 0 0 0 110 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.4 15.8 18.6 27.8 32.4 37.0 37.4 37.2 35.6 25.2 19.8 11.2 37.4 DAY 1 24 21 20 26 29 11 3 8 26 4 22 DIF. BETWEEN (MAX.-MIN.) (C) 7.9 8.9 9.7 10.6 12.0 12.3 11.9 12.1 11.5 9.7 7.6 6.5 10.0 MEAN DAILY TEMP. (MDT) (C) 3.2 4.5 8.7 17.9 22.6 25.8 27.7 27.8 24.7 15.3 7.7 4.8 15.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.3 59.0 152.1 207.5 212.2 112.3 0.0 0.0 0.0 743.4 HEATING DEG. DAYS(BASE 18 0C) 460.2 392.9 289.3 28.2 0.0 0.2 0.0 0.0 0.0 87.7 309.9 407.7 1976.1 DEWPOINT (MEAN C) -4.0 -4.8 -3.5 2.2 4.2 6.2 8.0 7.8 5.9 4.8 1.7 0.2 2.4 MIXING RATIO (G/KG) 3.48 3.26 3.67 5.47 6.26 7.14 8.17 8.02 7.00 6.46 5.20 4.68 5.73 VAPOUR PRESSURE (HPA) 4.69 4.40 4.95 7.36 8.40 9.55 10.92 10.73 9.39 8.71 7.03 6.32 7.70 SATURATION DEF. (HPA) 3.01 4.18 6.65 13.60 20.28 25.78 27.56 27.48 22.18 8.87 3.53 2.25 13.78 RELATIVE HUMIDITY (MEAN %) 64 55 45 37 31 29 30 30 32 54 69 75 46 RELATIVE HUMIDITY (MAX. %) 79 71 60 50 44 41 41 41 44 68 83 87 59 RELATIVE HUMIDITY (MIN. %) 47 39 32 26 21 21 21 21 22 40 54 61 34 RELATIVE HUMIDITY (MEAN% 03UTC) 73 65 56 46 43 40 41 39 41 64 77 82 56 RELATIVE HUMIDITY (MEAN% 09UTC) 54 45 38 30 24 23 24 23 24 44 58 65 38 RELATIVE HUMIDITY (MEAN% 15UTC) 62 51 38 31 25 24 24 25 30 52 68 76 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 65.1 71.0 20.6 3.8 0.5 0.1 0.0 0.0 5.7 73.0 47.8 95.4 383.0 DAYS WITH PRECIPITATION >=10 2 2 0 0 0 0 0 0 0 3 1 3 11 DAYS WITH PRECIPITATION >= 5 4 4 2 0 0 0 0 0 1 3 3 5 22 DAYS WITH PRECIPITATION >= 1 8 5 4 1 0 0 0 0 1 6 8 8 41 DAYS WITH PRECIPITATION 11 9 9 4 5 1 4 0 6 10 12 12 83 GREATEST DAILY PRECIPITATION 24.0 43.0 7.0 3.0 0.4 0.1 0.0 0.0 5.0 24.0 17.7 32.0 43.0 DAY 28 14 24 21 4 13 ** ** 25 4 8 11 DAY WITH THUNDER STORM 1 1 0 1 2 0 1 0 3 4 2 0 15 DAYS WITH SNOW OR SLEET 6 6 2 0 0 0 0 0 0 0 1 3 18 DAYS WITH DUST 0 0 1 0 6 0 0 0 0 0 0 2 9 WIND DIRECTION (PREVAILING) 180 225 270 225 225 180 180 225 180 360 180 180 225 PREVAILING WIND SPEED(KNOTS) 5.0 7.4 8.0 8.7 7.3 6.4 5.8 6.2 5.4 5.3 5.6 5.7 6.9 PREVAILING WIND PERCENT 5.6 7.3 8.5 12.5 13.7 12.9 11.7 11.7 10.0 7.7 3.8 5.6 8.1 CALMS PERCENT OF WIND 72.2 67.7 57.3 50.0 43.1 52.5 57.7 64.9 67.9 70.2 84.2 82.7 64.2 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 227 224 230 244 254 225 223 223 211 237 154 184 232 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.4 0.9 1.7 1.9 1.1 1.1 0.8 0.8 0.1 0.1 0.1 0.7 WIND STEADINESES (MEAN %) 13.3 20.0 30.0 43.6 50.0 39.3 44.0 40.0 44.4 6.3 11.1 10.0 31.8 WIND SPEED (MEAN KNOTS) 1.5 2.0 3.0 3.9 3.8 2.8 2.5 2.0 1.8 1.6 0.9 1.0 2.2 FASTEST WIND DIRECTION 210 290 190 260 240 280 290 180 150 210 210 300 280 FASTEST WIND SPEED (KNOTS) 14 14 17 19 19 23 17 16 12 12 14 16 23 DAY 22 26 14 10 10 17 15 19 5 4 1 25 DAYS WITH SKY CLEAR (0-2)/8 16 19 20 13 25 29 21 26 26 17 7 7 226 DAYS WITH P.CLOUDY (3-6)/8 5 5 6 9 4 1 9 5 2 7 11 9 73 DAYS WITH CLOUDY (7-8)/8 10 5 5 8 2 0 1 0 2 7 12 15 67 DAYS WITH VISIBILITY =< 2 KM 1 1 0 0 0 0 0 0 0 0 0 10 12 DURATION OF SUNSHINE HOURS 156.7 196.8 238.3 236.6 323.6 347.3 334.5 330.8 291.8 205.3 117.7 99.3 2878.7 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 844.2 844.4 843.2 844.3 842.3 841.5 842.7 843.4 844.3 847.9 849.1 846.7 844.5 MAX. QFE PRESSURE IN HPA 851.9 851.7 850.3 849.7 847.5 847.0 849.9 848.5 850.1 853.6 858.0 854.1 858.0 DAY-HOUR 30-21 29- 9 27- 6 2- 6 5- 6 3- 6 30- 6 23- 6 29-12 16- 6 17- 6 4- 6 MIN. QFE PRESSURE IN HPA 835.7 834.5 836.6 841.0 837.5 834.8 836.3 837.4 836.7 843.0 842.8 838.8 834.5 DAY-HOUR 21-12 7- 3 24-15 10- 3 26-21 24-15 11-15 30-15 1-15 1-12 21-12 15-12 MEAN QNH PRESSURE IN HPA 1017.1 1017.4 1016.0 1017.3 1015.0 1014.1 1015.5 1016.3 1017.3 1021.6 1022.9 1020.1 1017.5 MAX. QNH PRESSURE IN HPA 1026.2 1025.9 1024.3 1023.6 1021.0 1020.5 1023.8 1022.2 1024.1 1028.1 1033.2 1028.7 1033.2 DAY-HOUR 30-21 29- 9 27- 6 2- 6 5- 6 3- 6 30- 6 23- 6 29-12 16- 6 17- 6 4- 6 MIN. QNH PRESSURE IN HPA 1007.3 1005.9 1008.4 1013.5 1009.4 1006.3 1008.0 1009.3 1008.5 1015.8 1015.6 1010.9 1005.9 DAY-HOUR 21-12 7- 3 24-15 10- 3 26-21 24-15 11-15 30-15 1-15 1-12 21-12 15-12 MEAN QFF PRESSURE IN HPA 1018.5 1017.8 1013.5 1008.7 1003.2 1000.3 1000.7 1001.6 1004.6 1014.7 1021.1 1020.1 1010.4 MAX. QFF PRESSURE IN HPA 1029.2 1028.4 1023.8 1017.5 1008.9 1011.2 1009.5 1008.4 1015.1 1024.6 1033.4 1028.5 1033.4 DAY-HOUR 30-18 11- 3 1- 6 2- 6 3- 3 14- 3 30- 6 20- 6 26- 3 16- 6 17- 6 4- 6 MIN. QFF PRESSURE IN HPA 1007.4 1005.2 1002.8 1002.0 995.2 990.3 991.1 994.4 994.1 1006.5 1013.1 1010.9 990.3 DAY-HOUR 21-18 7- 0 24-15 21- 0 26-15 24-15 11-15 3-18 1-12 1-12 3- 0 15-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 844.0 844.1 843.1 844.0 842.1 841.3 842.6 843.4 844.2 847.5 848.8 846.5 844.3 MAX. QFE PRESSURE IN HPA 851.6 851.0 848.1 847.8 845.6 845.9 848.9 847.0 849.3 852.0 856.8 851.2 856.8 DAY 31 11 1 2 5 17 31 21 30 16 17 4 MIN. QFE PRESSURE IN HPA 836.5 835.4 837.3 841.6 837.6 835.2 837.7 838.8 837.5 843.6 843.4 839.2 835.2 DAY 21 7 25 10 27 25 11 31 2 1 22 16 MEAN QNH PRESSURE IN HPA 1016.9 1017.1 1015.9 1016.9 1014.7 1013.9 1015.3 1016.2 1017.2 1021.1 1022.5 1019.8 1017.3 MAX. QNH PRESSURE IN HPA 1025.8 1025.1 1021.7 1021.4 1018.8 1019.2 1022.7 1020.5 1023.1 1026.3 1031.8 1025.3 1031.8 DAY 31 11 1 2 5 17 31 21 30 16 17 4 MIN. QNH PRESSURE IN HPA 1008.2 1007.0 1009.2 1014.2 1009.5 1006.7 1009.6 1010.9 1009.4 1016.5 1016.3 1011.4 1006.7 DAY 21 7 25 10 27 25 11 31 2 1 22 16 MEAN QFF PRESSURE IN HPA 1017.8 1017.2 1013.2 1008.2 1002.9 1000.0 1000.3 1001.3 1004.1 1013.9 1020.4 1019.7 1009.9 MAX. QFF PRESSURE IN HPA 1028.6 1026.9 1021.2 1015.9 1007.6 1009.6 1008.4 1006.2 1013.1 1023.0 1031.8 1026.1 1031.8 DAY 31 11 1 2 3 14 31 21 26 16 17 18 MIN. QFF PRESSURE IN HPA 1008.4 1005.2 1003.4 1002.0 995.9 990.8 991.8 994.9 995.2 1007.2 1013.1 1011.7 990.8 DAY 21 7 25 21 27 25 12 31 2 1 3 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 844.1 844.3 843.4 844.3 842.8 842.1 843.4 844.1 844.7 848.0 849.0 846.5 844.7 MAX. QFE PRESSURE IN HPA 850.8 850.9 849.2 848.1 846.8 846.1 849.3 847.8 849.0 852.4 857.2 852.4 857.2 DAY 31 11 27 2 5 3 31 23 26 16 17 4 MIN. QFE PRESSURE IN HPA 836.0 834.5 837.6 841.0 838.6 836.8 837.9 839.2 838.8 844.0 843.6 839.6 834.5 DAY 21 7 9 10 27 26 11 31 2 1 22 16 MEAN QNH PRESSURE IN HPA 1017.0 1017.3 1016.3 1017.3 1015.5 1014.7 1016.2 1017.0 1017.7 1021.6 1022.8 1019.9 1017.8 MAX. QNH PRESSURE IN HPA 1024.9 1025.0 1023.0 1021.7 1020.2 1019.4 1023.1 1021.4 1022.8 1026.7 1032.3 1026.7 1032.3 DAY 31 11 27 2 5 3 31 23 26 16 17 4 MIN. QNH PRESSURE IN HPA 1007.7 1005.9 1009.5 1013.5 1010.7 1008.6 1009.9 1011.4 1010.9 1017.0 1016.5 1011.8 1005.9 DAY 21 7 9 10 27 26 11 31 2 1 22 16 MEAN QFF PRESSURE IN HPA 1019.1 1018.5 1014.4 1009.4 1004.5 1001.3 1001.8 1002.9 1005.9 1015.7 1021.6 1020.6 1011.3 MAX. QFF PRESSURE IN HPA 1028.8 1028.4 1022.3 1016.7 1008.9 1011.2 1009.3 1007.8 1015.1 1023.4 1032.8 1027.8 1032.8 DAY 31 11 16 2 3 14 31 23 26 16 17 4 MIN. QFF PRESSURE IN HPA 1009.1 1005.3 1006.3 1003.1 997.5 993.7 993.4 996.6 998.1 1009.0 1014.2 1012.4 993.4 DAY 21 7 25 21 27 25 11 31 1 1 3 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 845.1 845.1 844.3 845.4 843.4 842.6 843.9 844.7 845.5 849.0 850.0 847.5 845.5 MAX. QFE PRESSURE IN HPA 851.3 851.4 850.3 849.7 847.5 847.0 849.9 848.5 849.4 853.6 858.0 854.1 858.0 DAY 31 11 27 2 5 3 30 23 9 16 17 4 MIN. QFE PRESSURE IN HPA 837.0 834.5 838.4 842.4 839.2 837.3 838.3 839.8 838.8 844.4 844.4 840.4 834.5 DAY 21 7 9 22 27 26 11 30 1 1 22 15 MEAN QNH PRESSURE IN HPA 1018.2 1018.3 1017.3 1018.6 1016.3 1015.4 1016.8 1017.7 1018.7 1022.8 1023.9 1021.1 1018.8 MAX. QNH PRESSURE IN HPA 1025.5 1025.6 1024.3 1023.6 1021.0 1020.5 1023.8 1022.2 1023.2 1028.1 1033.2 1028.7 1033.2 DAY 31 11 27 2 5 3 30 23 9 16 17 4 MIN. QNH PRESSURE IN HPA 1008.8 1005.9 1010.4 1015.1 1011.4 1009.2 1010.3 1012.1 1010.9 1017.4 1017.4 1012.8 1005.9 DAY 21 7 9 22 27 26 11 30 1 1 22 15 MEAN QFF PRESSURE IN HPA 1019.7 1018.6 1014.8 1010.0 1004.4 1001.6 1002.0 1003.0 1005.9 1015.7 1022.0 1021.1 1011.6 MAX. QFF PRESSURE IN HPA 1028.2 1027.1 1023.8 1017.5 1008.9 1009.7 1009.5 1008.4 1013.8 1024.6 1033.4 1028.5 1033.4 DAY 31 11 1 2 5 14 30 20 26 16 17 4 MIN. QFF PRESSURE IN HPA 1008.9 1006.2 1007.2 1005.6 997.9 994.4 993.6 996.5 996.7 1008.0 1015.1 1013.4 993.6 DAY 21 7 24 10 27 24 11 31 1 1 22 15 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 844.4 844.8 843.6 844.8 842.8 842.2 843.3 844.1 844.7 848.2 849.2 846.8 844.9 MAX. QFE PRESSURE IN HPA 850.8 851.7 849.5 848.6 847.3 846.7 849.2 848.0 849.3 853.0 857.0 853.2 857.0 DAY 31 29 27 2 5 16 30 23 29 16 17 4 MIN. QFE PRESSURE IN HPA 836.2 835.5 838.7 842.1 838.8 837.0 837.7 839.0 838.3 843.9 843.8 839.8 835.5 DAY 21 7 24 10 27 26 11 31 1 1 21 15 MEAN QNH PRESSURE IN HPA 1017.5 1017.9 1016.5 1017.9 1015.6 1014.8 1016.2 1017.0 1017.8 1021.9 1023.0 1020.2 1018.0 MAX. QNH PRESSURE IN HPA 1024.9 1025.9 1023.4 1022.3 1020.8 1020.1 1023.0 1021.6 1023.1 1027.4 1032.1 1027.7 1032.1 DAY 31 29 27 2 5 16 30 23 29 16 17 4 MIN. QNH PRESSURE IN HPA 1007.9 1007.1 1010.8 1014.8 1010.9 1008.8 1009.6 1011.1 1010.3 1016.8 1016.7 1012.1 1007.1 DAY 21 7 24 10 27 26 11 31 1 1 21 15 MEAN QFF PRESSURE IN HPA 1018.4 1017.9 1013.7 1009.0 1003.6 1001.0 1001.3 1002.1 1004.8 1014.6 1021.0 1019.7 1010.6 MAX. QFF PRESSURE IN HPA 1026.9 1026.2 1022.0 1016.0 1008.7 1007.8 1008.9 1008.0 1011.5 1023.6 1032.2 1026.4 1032.2 DAY 31 10 1 2 5 14 30 20 29 16 17 4 MIN. QFF PRESSURE IN HPA 1007.5 1007.6 1004.7 1005.1 997.9 993.5 992.4 995.2 995.8 1007.1 1013.7 1011.8 992.4 DAY 21 7 24 10 27 24 11 31 1 1 3 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 843.5 843.7 842.3 843.7 841.8 841.0 842.2 842.7 843.6 847.3 848.4 846.1 843.9 MAX. QFE PRESSURE IN HPA 849.3 849.6 847.3 847.4 845.7 845.2 848.0 846.4 850.1 851.6 856.6 852.0 856.6 DAY 31 10 27 2 5 3 30 20 29 16 17 4 MIN. QFE PRESSURE IN HPA 835.7 835.0 837.1 841.0 838.4 835.6 837.1 838.2 836.8 843.0 842.8 838.8 835.0 DAY 21 7 13 10 27 24 11 31 1 1 21 15 MEAN QNH PRESSURE IN HPA 1016.3 1016.7 1015.0 1016.6 1014.4 1013.5 1014.8 1015.4 1016.5 1020.9 1022.1 1019.4 1016.8 MAX. QNH PRESSURE IN HPA 1023.1 1023.5 1020.8 1020.9 1018.9 1018.4 1021.6 1019.8 1024.1 1025.8 1031.6 1026.3 1031.6 DAY 31 10 27 2 5 3 30 20 29 16 17 4 MIN. QNH PRESSURE IN HPA 1007.3 1006.5 1008.9 1013.5 1010.4 1007.2 1008.9 1010.2 1008.6 1015.8 1015.6 1010.9 1006.5 DAY 21 7 13 10 27 24 11 31 1 1 21 15 MEAN QFF PRESSURE IN HPA 1017.3 1016.7 1012.1 1007.8 1002.4 999.6 999.9 1000.5 1003.5 1013.7 1020.0 1019.2 1009.4 MAX. QFF PRESSURE IN HPA 1025.4 1025.9 1019.3 1014.8 1007.0 1006.0 1007.5 1006.1 1014.1 1022.0 1032.0 1025.4 1032.0 DAY 14 10 1 2 11 3 30 20 29 16 17 4 MIN. QFF PRESSURE IN HPA 1007.6 1007.2 1003.9 1003.4 996.4 991.0 991.6 994.6 994.1 1006.5 1013.2 1010.9 991.0 DAY 21 7 24 10 26 24 11 31 1 1 2 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 843.8 844.2 842.4 843.5 841.4 840.5 841.6 842.2 843.4 847.5 848.9 846.7 843.8 MAX. QFE PRESSURE IN HPA 850.5 850.4 847.1 846.6 845.1 845.2 847.4 846.6 849.4 851.6 856.8 852.4 856.8 DAY 30 10 27 2 5 16 30 20 29 16 17 4 MIN. QFE PRESSURE IN HPA 836.0 836.7 836.6 841.2 837.7 834.8 836.3 837.4 836.7 843.0 843.5 839.6 834.8 DAY 21 7 24 10 26 24 11 30 1 1 21 15 MEAN QNH PRESSURE IN HPA 1016.8 1017.2 1015.1 1016.3 1013.9 1012.9 1014.2 1014.9 1016.2 1021.0 1022.7 1020.1 1016.8 MAX. QNH PRESSURE IN HPA 1024.5 1024.4 1020.6 1020.0 1018.2 1018.4 1020.9 1020.0 1023.2 1025.8 1031.8 1026.7 1031.8 DAY 30 10 27 2 5 16 30 20 29 16 17 4 MIN. QNH PRESSURE IN HPA 1007.7 1008.5 1008.4 1013.7 1009.6 1006.3 1008.0 1009.3 1008.5 1015.8 1016.4 1011.8 1006.3 DAY 21 7 24 10 26 24 11 30 1 1 21 15 MEAN QFF PRESSURE IN HPA 1018.8 1018.3 1013.1 1008.4 1002.8 999.4 999.7 1000.8 1004.4 1015.1 1021.6 1020.8 1010.3 MAX. QFF PRESSURE IN HPA 1028.8 1028.0 1020.5 1014.5 1008.1 1007.6 1007.3 1007.5 1014.1 1021.9 1033.2 1027.8 1033.2 DAY 30 10 3 2 2 13 30 20 25 16 17 4 MIN. QFF PRESSURE IN HPA 1008.5 1009.8 1002.8 1004.4 995.2 990.3 991.1 994.5 994.7 1008.0 1014.2 1012.4 990.3 DAY 21 7 24 10 26 24 11 30 1 1 2 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 844.3 844.7 843.1 844.3 842.0 841.1 842.4 843.0 844.2 848.2 849.3 847.0 844.5 MAX. QFE PRESSURE IN HPA 851.4 851.2 848.0 847.8 846.0 846.1 848.7 847.4 850.0 852.8 856.6 852.2 856.6 DAY 30 10 27 2 6 16 30 20 29 15 16 4 MIN. QFE PRESSURE IN HPA 836.7 837.6 837.2 841.8 837.8 835.2 836.9 837.8 837.6 844.4 843.7 839.5 835.2 DAY 21 6 24 21 26 24 11 30 1 1 21 15 MEAN QNH PRESSURE IN HPA 1017.4 1017.7 1015.9 1017.3 1014.7 1013.6 1015.1 1015.8 1017.2 1021.8 1023.2 1020.4 1017.5 MAX. QNH PRESSURE IN HPA 1025.6 1025.3 1021.6 1021.4 1019.3 1019.4 1022.4 1020.9 1023.9 1027.2 1031.6 1026.5 1031.6 DAY 30 10 27 2 6 16 30 20 29 15 16 4 MIN. QNH PRESSURE IN HPA 1008.5 1009.5 1009.1 1014.4 1009.7 1006.7 1008.7 1009.7 1009.5 1017.4 1016.6 1011.7 1006.7 DAY 21 6 24 21 26 24 11 30 1 1 21 15 MEAN QFF PRESSURE IN HPA 1018.8 1017.9 1013.3 1008.6 1002.8 999.8 1000.3 1001.0 1004.4 1014.8 1021.3 1020.4 1010.3 MAX. QFF PRESSURE IN HPA 1029.2 1027.9 1021.7 1014.9 1008.0 1008.2 1008.0 1006.8 1013.3 1023.7 1031.5 1026.2 1031.5 DAY 30 10 3 2 2 16 30 20 25 15 17 17 MIN. QFF PRESSURE IN HPA 1007.4 1009.4 1003.0 1004.4 995.3 990.9 991.6 994.4 995.8 1008.5 1013.9 1012.6 990.9 DAY 21 6 24 30 26 24 11 3 1 1 21 11 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 844.1 844.5 843.3 844.2 842.1 841.4 842.6 843.2 844.3 848.0 849.3 846.7 844.5 MAX. QFE PRESSURE IN HPA 851.9 851.2 848.0 847.8 845.8 845.9 848.9 847.0 849.6 852.2 856.8 852.0 856.8 DAY 30 10 27 2 6 16 30 20 29 15 16 4 MIN. QFE PRESSURE IN HPA 837.0 837.0 837.3 841.9 837.5 835.2 837.6 838.4 837.6 844.4 843.7 839.1 835.2 DAY 21 6 24 10 26 24 10 30 1 13 21 15 MEAN QNH PRESSURE IN HPA 1017.1 1017.6 1016.2 1017.2 1014.8 1013.9 1015.4 1016.0 1017.3 1021.7 1023.1 1020.1 1017.5 MAX. QNH PRESSURE IN HPA 1026.2 1025.3 1021.6 1021.4 1019.1 1019.2 1022.7 1020.5 1023.5 1026.5 1031.8 1026.3 1031.8 DAY 30 10 27 2 6 16 30 20 29 15 16 4 MIN. QNH PRESSURE IN HPA 1008.8 1008.8 1009.2 1014.5 1009.4 1006.7 1009.5 1010.4 1009.5 1017.4 1016.6 1011.3 1006.7 DAY 21 6 24 10 26 24 10 30 1 13 21 15 MEAN QFF PRESSURE IN HPA 1018.1 1017.5 1013.3 1008.3 1002.8 1000.0 1000.4 1001.0 1004.3 1014.5 1021.1 1019.7 1010.1 MAX. QFF PRESSURE IN HPA 1029.0 1027.0 1021.2 1014.4 1008.2 1009.4 1008.7 1006.0 1012.9 1023.2 1031.5 1025.5 1031.5 DAY 30 10 3 1 2 13 30 19 25 15 16 17 MIN. QFF PRESSURE IN HPA 1007.8 1007.4 1002.9 1003.3 995.4 991.1 992.0 994.5 995.7 1008.0 1013.9 1012.1 991.1 DAY 21 6 24 30 26 24 11 30 1 1 21 15 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.4 5.4 11.8 17.7 21.5 26.3 27.8 27.8 23.2 17.2 9.4 6.5 16.4 MINIMUN AIR TEMPERATURE (C) -1.0 1.0 7.1 12.1 15.8 19.9 22.1 21.4 17.4 12.2 5.4 3.2 11.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 3 13 21 20 1 0 0 0 58 DAYS WITH MINIMUM TEMP. <=-4 6 0 0 0 0 0 0 0 0 0 0 0 6 DAYS WITH FREEZING MIN.<= 0 18 10 0 0 0 0 0 0 0 0 3 4 35 TEMPERATURE RECORDS LOWEST(C) -10.4 -3.6 0.6 6.6 11.0 13.6 17.0 17.2 11.5 8.2 -2.8 -1.8 -10.4 DAY 28 23 11 10 4 12 19 12 22 31 20 22 MAXIMUM AIR TEMPERATURE (C) 6.6 10.3 16.7 23.5 27.1 32.2 33.3 33.9 29.3 23.0 14.6 10.7 21.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 5 23 29 28 16 0 0 0 101 DAYS WITH MAXIMUM TEMP. <= 0 3 0 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS HIGHEST(C) 14.2 16.6 23.8 27.0 33.4 37.8 38.0 38.0 33.4 28.0 22.0 16.8 38.0 DAY 13 28 31 5 15 27 10 3 5 1 6 31 DIF. BETWEEN (MAX.-MIN.) (C) 7.6 9.3 9.6 11.4 11.3 12.3 11.2 12.5 11.9 10.8 9.2 7.5 10.4 MEAN DAILY TEMP. (MDT) (C) 2.8 5.6 11.9 17.8 21.5 26.0 27.7 27.7 23.4 17.6 10.0 7.0 16.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.3 44.9 157.0 207.1 207.1 86.7 2.3 0.0 0.0 706.5 HEATING DEG. DAYS(BASE 18 0C) 471.5 345.9 188.7 33.0 3.3 2.5 0.0 0.0 3.5 33.9 240.9 342.5 1665.6 DEWPOINT (MEAN C) -3.8 -4.3 -0.3 0.2 3.4 4.6 8.6 7.2 4.6 2.7 -0.1 0.2 1.9 MIXING RATIO (G/KG) 3.50 3.37 4.55 4.70 5.98 6.52 8.51 7.75 6.44 5.74 4.60 4.78 5.54 VAPOUR PRESSURE (HPA) 4.73 4.55 6.12 6.33 8.02 8.72 11.34 10.38 8.66 7.75 6.21 6.47 7.44 SATURATION DEF. (HPA) 2.84 4.67 8.32 14.58 18.51 27.00 26.82 28.13 20.84 12.46 6.03 3.45 14.47 RELATIVE HUMIDITY (MEAN %) 67 52 47 32 33 28 32 30 33 42 54 67 43 RELATIVE HUMIDITY (MAX. %) 79 69 63 45 50 40 45 43 46 59 73 83 58 RELATIVE HUMIDITY (MIN. %) 53 36 34 21 22 18 22 19 21 25 36 50 30 RELATIVE HUMIDITY (MEAN% 03UTC) 71 65 57 43 44 39 44 41 44 55 64 75 54 RELATIVE HUMIDITY (MEAN% 09UTC) 59 42 40 25 25 22 25 22 23 29 42 55 34 RELATIVE HUMIDITY (MEAN% 15UTC) 66 49 41 27 27 21 25 25 31 39 53 67 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 61.0 2.7 31.1 1.8 28.9 9.0 1.1 10.0 34.0 19.6 34.5 68.3 302.0 DAYS WITH PRECIPITATION >=10 2 0 1 0 1 0 0 0 2 1 0 2 9 DAYS WITH PRECIPITATION >= 5 4 0 2 0 1 1 0 1 2 1 3 7 22 DAYS WITH PRECIPITATION >= 1 8 1 5 1 7 1 0 1 2 5 7 9 47 DAYS WITH PRECIPITATION 12 5 7 2 9 2 4 4 3 10 11 14 83 GREATEST DAILY PRECIPITATION 20.0 1.0 18.1 1.4 13.0 9.0 0.7 9.8 19.0 10.2 9.0 16.0 20.0 DAY 20 19 10 26 4 12 18 12 19 26 18 5 DAY WITH THUNDER STORM 0 0 1 1 3 1 1 5 2 5 1 1 21 DAYS WITH SNOW OR SLEET 9 1 1 0 0 0 0 0 0 0 0 1 12 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 360 180 180 360 270 225 180 225 225 225 45 180 225 PREVAILING WIND SPEED(KNOTS) 4.5 5.9 5.5 5.6 7.3 6.3 5.4 7.2 6.1 6.9 4.2 5.5 6.6 PREVAILING WIND PERCENT 9.3 8.5 10.1 12.5 12.9 12.5 11.7 7.7 9.6 10.9 10.4 4.4 8.2 CALMS PERCENT OF WIND 75.4 67.0 58.9 52.1 47.2 62.9 58.9 62.1 60.0 52.4 70.0 85.5 62.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 53 204 225 249 245 213 223 254 228 241 37 195 232 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.6 0.6 0.9 1.4 0.9 1.0 0.7 0.7 0.7 0.3 0.3 0.6 WIND STEADINESES (MEAN %) 8.3 28.6 26.1 28.1 41.2 39.1 45.5 30.4 33.3 25.9 20.0 37.5 27.3 WIND SPEED (MEAN KNOTS) 1.2 2.1 2.3 3.2 3.4 2.3 2.2 2.3 2.1 2.7 1.5 0.8 2.2 FASTEST WIND DIRECTION 170 360 240 210 290 340 30 360 210 270 230 30 360 FASTEST WIND SPEED (KNOTS) 10 27 23 19 21 19 23 19 14 17 19 10 27 DAY 18 15 16 15 7 11 21 7 8 21 17 3 DAYS WITH SKY CLEAR (0-2)/8 13 10 13 12 14 25 24 27 25 18 14 7 202 DAYS WITH P.CLOUDY (3-6)/8 5 14 8 14 15 4 7 4 4 13 6 9 103 DAYS WITH CLOUDY (7-8)/8 13 4 10 4 2 1 0 0 1 0 10 15 60 DAYS WITH VISIBILITY =< 2 KM 6 0 1 0 0 0 0 0 1 0 1 6 15 DURATION OF SUNSHINE HOURS 128.6 191.3 219.2 255.6 293.6 321.1 335.0 330.8 285.2 245.8 153.6 113.2 2873.0 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 846.9 844.4 843.9 843.6 842.5 840.8 841.0 843.7 845.4 847.3 847.1 847.9 844.6 MAX. QFE PRESSURE IN HPA 850.4 853.5 853.9 852.6 846.9 848.8 848.1 849.4 852.0 856.0 854.3 852.6 856.0 DAY-HOUR 17- 6 9-18 1- 6 2- 6 17- 0 2- 6 29- 6 5- 6 22- 6 10- 6 2- 6 10- 6 MIN. QFE PRESSURE IN HPA 842.2 829.4 832.6 836.3 836.2 834.6 835.2 837.5 839.4 841.9 835.4 841.2 829.4 DAY-HOUR 19-12 21-12 26- 0 12-12 29-21 18-15 10-15 27-12 5-15 31-12 18-18 5-12 MEAN QNH PRESSURE IN HPA 1020.4 1017.4 1016.9 1016.5 1015.2 1013.3 1013.5 1016.6 1018.6 1020.9 1020.5 1021.5 1017.6 MAX. QNH PRESSURE IN HPA 1024.4 1028.0 1028.5 1027.0 1020.3 1022.5 1021.7 1023.2 1026.3 1030.9 1028.9 1027.0 1030.9 DAY-HOUR 17- 6 9-18 1- 6 2- 6 17- 0 2- 6 29- 6 5- 6 22- 6 10- 6 2- 6 10- 6 MIN. QNH PRESSURE IN HPA 1014.9 1000.0 1003.7 1008.0 1007.9 1006.0 1006.7 1009.4 1011.6 1014.5 1007.0 1013.7 1000.0 DAY-HOUR 19-12 21-12 26- 0 12-12 29-21 18-15 10-15 27-12 5-15 31-12 18-18 5-12 MEAN QFF PRESSURE IN HPA 1022.0 1017.0 1012.2 1008.0 1004.3 999.5 998.7 1002.0 1006.7 1012.7 1017.4 1020.3 1010.1 MAX. QFF PRESSURE IN HPA 1030.0 1028.8 1025.9 1018.4 1011.0 1010.6 1007.9 1009.9 1018.9 1023.2 1028.8 1027.6 1030.0 DAY-HOUR 29-15 10- 6 11-21 2- 3 12- 3 2- 6 29- 6 14- 6 22- 3 10- 6 20-15 22-15 MIN. QFF PRESSURE IN HPA 1015.3 996.9 996.6 1000.3 994.8 991.1 990.3 994.8 997.1 1003.8 1003.6 1012.4 990.3 DAY-HOUR 4- 3 21-12 25-12 12-21 29-18 6-15 10-15 27-12 5-12 1-12 18-18 20-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 846.6 844.2 843.7 843.4 842.3 840.6 840.7 843.7 845.3 847.1 846.7 847.8 844.3 MAX. QFE PRESSURE IN HPA 849.5 852.8 851.9 850.7 846.9 846.2 846.0 847.6 851.0 853.8 851.6 851.6 853.8 DAY 10 10 2 2 17 3 28 5 22 10 5 10 MIN. QFE PRESSURE IN HPA 842.4 832.7 832.6 837.7 836.4 835.2 835.7 839.6 840.1 843.5 837.1 842.2 832.6 DAY 19 22 26 13 30 18 11 27 1 26 19 5 MEAN QNH PRESSURE IN HPA 1020.0 1017.2 1016.6 1016.3 1015.0 1013.0 1013.2 1016.6 1018.5 1020.6 1020.0 1021.4 1017.4 MAX. QNH PRESSURE IN HPA 1023.4 1027.2 1026.2 1024.8 1020.3 1019.5 1019.3 1021.2 1025.1 1028.4 1025.8 1025.8 1028.4 DAY 10 10 2 2 17 3 28 5 22 10 5 10 MIN. QNH PRESSURE IN HPA 1015.1 1003.8 1003.7 1009.6 1008.1 1006.7 1007.3 1011.8 1012.4 1016.4 1008.9 1014.9 1003.7 DAY 19 22 26 13 30 18 11 27 1 26 19 5 MEAN QFF PRESSURE IN HPA 1021.3 1016.7 1011.6 1007.7 1004.2 999.2 998.2 1001.7 1006.2 1011.9 1016.5 1019.9 1009.6 MAX. QFF PRESSURE IN HPA 1028.1 1027.8 1025.0 1016.1 1010.5 1007.6 1004.6 1009.6 1017.2 1020.6 1026.2 1026.0 1028.1 DAY 30 10 12 2 1 12 28 13 22 11 20 23 MIN. QFF PRESSURE IN HPA 1015.4 1002.7 997.9 1003.0 995.0 991.6 990.7 996.0 998.7 1005.3 1005.2 1014.1 990.7 DAY 4 21 25 13 30 7 11 24 1 1 18 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 846.7 844.4 844.1 843.9 842.9 841.3 841.6 844.3 845.8 847.6 847.0 847.8 844.8 MAX. QFE PRESSURE IN HPA 850.0 852.6 851.9 852.0 845.7 847.9 847.2 849.0 851.6 854.8 852.4 851.8 854.8 DAY 17 9 2 2 14 2 28 5 22 10 2 10 MIN. QFE PRESSURE IN HPA 842.7 833.7 833.0 838.8 837.0 835.8 836.3 839.4 840.7 843.8 837.4 841.5 833.0 DAY 19 22 26 13 30 18 11 27 1 31 18 5 MEAN QNH PRESSURE IN HPA 1020.1 1017.5 1017.1 1016.8 1015.6 1013.9 1014.2 1017.3 1019.1 1021.1 1020.4 1021.4 1017.9 MAX. QNH PRESSURE IN HPA 1023.9 1027.0 1026.2 1026.3 1018.9 1021.5 1020.7 1022.8 1025.8 1029.5 1026.7 1026.0 1029.5 DAY 17 9 2 2 14 2 28 5 22 10 2 10 MIN. QNH PRESSURE IN HPA 1015.5 1005.0 1004.2 1010.9 1008.8 1007.4 1008.0 1011.6 1013.1 1016.7 1009.3 1014.1 1004.2 DAY 19 22 26 13 30 18 11 27 1 31 18 5 MEAN QFF PRESSURE IN HPA 1022.5 1018.0 1013.0 1009.1 1005.2 1000.3 999.7 1003.3 1008.1 1013.9 1018.1 1020.9 1011.0 MAX. QFF PRESSURE IN HPA 1029.8 1027.6 1024.2 1018.4 1011.0 1010.3 1006.8 1009.7 1018.9 1022.6 1028.6 1026.7 1029.8 DAY 29 9 12 2 12 2 28 14 22 10 20 18 MIN. QFF PRESSURE IN HPA 1015.3 1002.9 997.4 1003.0 995.2 993.0 991.5 997.0 1000.6 1006.7 1005.6 1014.9 991.5 DAY 4 21 25 26 30 18 11 24 5 1 18 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 847.7 845.3 845.0 844.7 843.5 842.0 842.2 845.0 846.6 848.6 847.9 848.8 845.6 MAX. QFE PRESSURE IN HPA 850.4 853.4 853.9 852.6 846.6 848.8 848.1 849.4 852.0 856.0 854.3 852.6 856.0 DAY 17 10 1 2 1 2 29 5 22 10 2 10 MIN. QFE PRESSURE IN HPA 843.6 833.8 834.0 840.1 837.2 836.2 836.6 839.4 841.7 844.5 837.9 841.6 833.8 DAY 19 21 26 13 30 18 18 27 1 31 18 5 MEAN QNH PRESSURE IN HPA 1021.3 1018.5 1018.1 1017.8 1016.4 1014.6 1014.9 1018.1 1020.0 1022.3 1021.6 1022.6 1018.8 MAX. QNH PRESSURE IN HPA 1024.4 1027.9 1028.5 1027.0 1020.0 1022.5 1021.7 1023.2 1026.3 1030.9 1028.9 1027.0 1030.9 DAY 17 10 1 2 1 2 29 5 22 10 2 10 MIN. QNH PRESSURE IN HPA 1016.5 1005.1 1005.3 1012.4 1009.1 1007.9 1008.4 1011.6 1014.3 1017.5 1009.9 1014.2 1005.1 DAY 19 21 26 13 30 18 18 27 1 31 18 5 MEAN QFF PRESSURE IN HPA 1023.0 1018.1 1013.5 1009.2 1005.4 1000.9 1000.2 1003.4 1008.0 1014.1 1018.4 1021.6 1011.3 MAX. QFF PRESSURE IN HPA 1029.4 1028.8 1024.6 1017.9 1010.8 1010.6 1007.9 1009.9 1018.7 1023.2 1028.6 1027.3 1029.4 DAY 29 10 12 2 1 2 29 14 22 10 20 22 MIN. QFF PRESSURE IN HPA 1017.1 1002.0 1000.6 1003.0 996.0 993.3 992.5 996.0 1000.1 1006.2 1005.6 1014.4 992.5 DAY 5 21 25 26 30 18 11 24 1 1 18 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 847.2 844.8 844.5 844.1 843.0 841.5 841.7 844.4 845.9 847.8 847.2 847.9 845.0 MAX. QFE PRESSURE IN HPA 850.4 853.3 853.5 852.0 846.5 848.4 846.8 848.9 851.8 855.2 853.8 852.1 855.2 DAY 17 9 1 2 16 2 29 5 22 10 2 9 MIN. QFE PRESSURE IN HPA 843.0 832.4 834.6 839.0 837.3 835.9 835.9 838.2 840.8 842.8 836.5 841.8 832.4 DAY 19 21 25 13 30 18 18 27 1 31 18 5 MEAN QNH PRESSURE IN HPA 1020.7 1017.9 1017.5 1017.1 1015.8 1014.1 1014.3 1017.5 1019.2 1021.4 1020.7 1021.5 1018.1 MAX. QNH PRESSURE IN HPA 1024.4 1027.8 1028.0 1026.3 1019.9 1022.1 1020.2 1022.7 1026.0 1030.0 1028.4 1026.4 1030.0 DAY 17 9 1 2 16 2 29 5 22 10 2 9 MIN. QNH PRESSURE IN HPA 1015.8 1003.5 1006.0 1011.1 1009.2 1007.5 1007.5 1010.2 1013.2 1015.6 1008.2 1014.4 1003.5 DAY 19 21 25 13 30 18 18 27 1 31 18 5 MEAN QFF PRESSURE IN HPA 1021.9 1017.1 1012.6 1008.2 1004.8 1000.2 999.3 1002.5 1007.0 1012.8 1017.2 1020.0 1010.3 MAX. QFF PRESSURE IN HPA 1027.9 1028.1 1024.7 1017.8 1009.2 1009.9 1005.9 1009.0 1017.6 1022.2 1026.9 1026.2 1028.1 DAY 29 9 11 2 1 2 29 14 22 10 20 22 MIN. QFF PRESSURE IN HPA 1016.5 999.9 999.2 1001.8 996.5 992.9 991.6 995.5 999.5 1005.9 1004.4 1014.1 991.6 DAY 19 21 25 26 30 18 9 27 5 1 18 20 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 846.4 843.7 843.2 843.0 841.9 840.4 840.5 843.0 844.6 846.5 846.5 847.2 843.9 MAX. QFE PRESSURE IN HPA 848.9 852.6 851.4 850.6 845.7 846.8 845.1 846.8 849.8 853.7 852.4 851.8 853.7 DAY 9 9 1 2 16 2 28 5 22 10 2 9 MIN. QFE PRESSURE IN HPA 842.2 829.4 832.8 836.3 836.8 835.0 835.5 837.5 839.5 841.9 836.4 841.2 829.4 DAY 19 21 25 12 8 18 18 27 5 31 18 5 MEAN QNH PRESSURE IN HPA 1019.7 1016.6 1016.0 1015.9 1014.6 1012.8 1012.9 1015.8 1017.7 1019.9 1019.9 1020.7 1016.9 MAX. QNH PRESSURE IN HPA 1022.7 1027.0 1025.6 1024.6 1018.9 1020.2 1018.2 1020.2 1023.7 1028.2 1026.7 1026.0 1028.2 DAY 9 9 1 2 16 2 28 5 22 10 2 9 MIN. QNH PRESSURE IN HPA 1014.9 1000.0 1003.9 1008.0 1008.6 1006.5 1007.1 1009.4 1011.7 1014.5 1008.1 1013.7 1000.0 DAY 19 21 25 12 8 18 18 27 5 31 18 5 MEAN QFF PRESSURE IN HPA 1021.1 1015.9 1010.9 1007.2 1003.6 999.0 998.0 1001.0 1005.5 1011.3 1016.4 1019.1 1009.1 MAX. QFF PRESSURE IN HPA 1027.7 1027.9 1023.7 1015.8 1008.6 1008.5 1003.8 1008.8 1014.9 1020.7 1026.2 1024.6 1027.9 DAY 29 9 11 2 5 12 28 12 22 10 20 22 MIN. QFF PRESSURE IN HPA 1015.5 996.9 996.6 1000.4 996.2 992.0 990.6 994.8 997.1 1003.8 1005.2 1012.4 990.6 DAY 1 21 25 12 30 18 10 27 5 1 18 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 846.8 843.9 843.2 842.8 841.6 839.8 839.9 842.5 844.4 846.6 846.9 847.7 843.8 MAX. QFE PRESSURE IN HPA 849.4 852.9 851.8 850.3 844.9 845.6 845.1 846.3 849.4 853.7 852.3 852.2 853.7 DAY 9 9 1 1 16 2 28 14 22 10 2 9 MIN. QFE PRESSURE IN HPA 843.0 830.7 833.6 836.3 836.5 834.6 835.2 837.8 839.4 842.0 835.5 841.4 830.7 DAY 19 21 25 12 8 18 10 27 5 31 18 5 MEAN QNH PRESSURE IN HPA 1020.2 1016.9 1016.0 1015.6 1014.1 1012.1 1012.2 1015.3 1017.4 1020.0 1020.3 1021.2 1016.8 MAX. QNH PRESSURE IN HPA 1023.2 1027.3 1026.0 1024.3 1018.0 1018.8 1018.2 1019.6 1023.2 1028.2 1026.6 1026.5 1028.2 DAY 9 9 1 1 16 2 28 14 22 10 2 9 MIN. QNH PRESSURE IN HPA 1015.8 1001.5 1004.9 1008.0 1008.2 1006.0 1006.7 1009.7 1011.6 1014.6 1007.1 1013.9 1001.5 DAY 19 21 25 12 8 18 10 27 5 31 18 5 MEAN QFF PRESSURE IN HPA 1022.6 1017.2 1011.8 1007.8 1003.7 998.6 997.7 1001.3 1006.4 1012.8 1018.0 1020.6 1009.9 MAX. QFF PRESSURE IN HPA 1030.0 1028.7 1024.3 1016.2 1008.7 1008.5 1004.4 1007.5 1015.4 1021.6 1028.8 1027.6 1030.0 DAY 29 9 11 1 5 12 28 14 22 10 20 22 MIN. QFF PRESSURE IN HPA 1016.5 999.7 999.9 1000.4 995.9 991.1 990.3 995.6 998.4 1005.6 1004.6 1013.1 990.3 DAY 4 21 25 12 29 6 10 24 5 1 18 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 847.2 844.4 844.0 843.5 842.4 840.5 840.8 843.4 845.2 847.4 847.4 848.1 844.5 MAX. QFE PRESSURE IN HPA 849.9 853.5 852.9 850.7 846.7 846.4 845.7 846.7 850.6 854.3 852.3 852.3 854.3 DAY 9 9 1 1 16 2 27 13 22 10 2 9 MIN. QFE PRESSURE IN HPA 843.1 831.2 833.2 837.1 836.4 835.4 835.6 838.9 839.8 842.6 835.4 842.6 831.2 DAY 19 21 25 12 29 17 17 27 5 31 18 5 MEAN QNH PRESSURE IN HPA 1020.7 1017.4 1017.0 1016.4 1015.1 1012.8 1013.2 1016.2 1018.4 1020.9 1021.0 1021.8 1017.6 MAX. QNH PRESSURE IN HPA 1023.8 1028.0 1027.3 1024.8 1020.1 1019.8 1018.9 1020.1 1024.6 1028.9 1026.6 1026.6 1028.9 DAY 9 9 1 1 16 2 27 13 22 10 2 9 MIN. QNH PRESSURE IN HPA 1015.9 1002.1 1004.4 1008.9 1008.1 1007.0 1007.2 1011.0 1012.1 1015.3 1007.0 1015.3 1002.1 DAY 19 21 25 12 29 17 17 27 5 31 18 5 MEAN QFF PRESSURE IN HPA 1022.5 1016.8 1012.3 1007.7 1004.0 999.0 998.5 1001.4 1006.4 1012.7 1017.8 1020.7 1010.0 MAX. QFF PRESSURE IN HPA 1029.7 1028.0 1025.0 1015.8 1009.4 1009.4 1004.3 1008.1 1016.8 1021.1 1027.5 1027.5 1029.7 DAY 29 9 11 2 11 12 29 12 21 10 20 22 MIN. QFF PRESSURE IN HPA 1016.8 1000.6 1000.5 1000.3 994.8 992.0 991.2 995.6 997.5 1005.3 1003.6 1014.3 991.2 DAY 4 21 25 12 29 29 10 24 5 1 18 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 847.0 844.4 844.0 843.6 842.3 840.6 840.9 843.5 845.5 847.4 847.1 848.0 844.5 MAX. QFE PRESSURE IN HPA 850.0 853.5 852.5 850.7 846.5 846.6 845.7 847.2 851.1 854.2 852.0 851.6 854.2 DAY 9 9 1 1 16 2 27 4 21 9 4 9 MIN. QFE PRESSURE IN HPA 843.3 831.8 832.8 837.0 836.2 835.6 835.9 838.9 840.1 842.8 835.5 842.4 831.8 DAY 19 21 25 12 29 17 10 27 5 31 18 4 MEAN QNH PRESSURE IN HPA 1020.4 1017.4 1017.0 1016.4 1015.0 1013.0 1013.4 1016.4 1018.7 1020.9 1020.6 1021.6 1017.6 MAX. QNH PRESSURE IN HPA 1023.9 1028.0 1026.9 1024.8 1019.9 1020.0 1018.9 1020.7 1025.2 1028.8 1026.3 1025.8 1028.8 DAY 9 9 1 1 16 2 27 4 21 9 4 9 MIN. QNH PRESSURE IN HPA 1016.1 1002.8 1003.9 1008.8 1007.9 1007.2 1007.5 1011.0 1012.4 1015.6 1007.1 1015.1 1002.8 DAY 19 21 25 12 29 17 10 27 5 31 18 4 MEAN QFF PRESSURE IN HPA 1021.7 1016.5 1011.9 1007.6 1003.9 999.1 998.3 1001.4 1006.4 1012.3 1017.1 1019.9 1009.7 MAX. QFF PRESSURE IN HPA 1028.5 1028.4 1025.9 1015.9 1008.1 1009.4 1004.3 1008.7 1017.5 1020.9 1026.7 1026.5 1028.5 DAY 29 9 11 1 5 12 29 12 21 10 19 22 MIN. QFF PRESSURE IN HPA 1016.5 1001.5 998.9 1000.3 995.0 991.9 990.6 995.5 998.5 1006.5 1004.3 1013.9 990.6 DAY 3 21 24 12 29 29 9 24 5 6 18 20 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.0 6.8 11.1 12.9 19.6 25.3 27.9 28.7 25.3 19.8 9.7 2.1 16.0 MINIMUN AIR TEMPERATURE (C) -0.2 2.1 5.8 8.7 13.7 18.7 21.8 22.8 18.8 14.3 5.9 -0.4 11.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 7 19 26 4 0 0 0 56 DAYS WITH MINIMUM TEMP. <=-4 4 0 0 0 0 0 0 0 0 0 0 3 7 DAYS WITH FREEZING MIN.<= 0 21 9 1 0 0 0 0 0 0 0 1 19 51 TEMPERATURE RECORDS LOWEST(C) -6.8 -3.4 0.0 1.6 6.8 13.2 18.0 20.0 15.0 8.6 -0.4 -5.0 -6.8 DAY 13 1 10 4 5 8 31 22 26 21 30 23 MAXIMUM AIR TEMPERATURE (C) 7.3 11.9 16.9 17.4 25.4 31.1 33.7 35.0 32.0 26.2 14.7 5.6 21.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 4 21 30 31 26 2 0 0 114 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.5 17.4 23.2 24.0 32.0 35.0 38.4 39.0 34.4 31.2 21.8 11.2 39.0 DAY 1 26 27 28 29 13 19 10 3 3 11 8 DIF. BETWEEN (MAX.-MIN.) (C) 7.5 9.8 11.1 8.7 11.7 12.4 11.9 12.2 13.2 11.9 8.8 6.0 10.4 MEAN DAILY TEMP. (MDT) (C) 3.5 7.0 11.3 13.1 19.5 24.9 27.8 28.9 25.4 20.3 10.3 2.6 16.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 24.8 119.2 210.5 244.1 133.2 27.5 0.0 0.0 759.4 HEATING DEG. DAYS(BASE 18 0C) 449.1 308.4 206.6 150.2 28.0 0.0 0.0 0.0 0.0 16.3 230.6 477.1 1866.3 DEWPOINT (MEAN C) -3.5 -4.0 -2.8 4.4 4.8 4.8 8.7 7.7 3.4 2.3 1.1 -2.7 2.0 MIXING RATIO (G/KG) 3.61 3.44 3.91 6.42 6.51 6.54 8.53 8.03 5.93 5.42 5.02 3.89 5.60 VAPOUR PRESSURE (HPA) 4.88 4.64 5.26 8.60 8.72 8.75 11.40 10.73 7.99 7.32 6.80 5.25 7.53 SATURATION DEF. (HPA) 3.03 5.62 8.51 6.85 15.12 24.52 27.29 29.77 25.38 16.77 5.73 2.01 14.22 RELATIVE HUMIDITY (MEAN %) 65 49 41 60 40 28 32 29 26 34 58 73 45 RELATIVE HUMIDITY (MAX. %) 80 68 60 77 56 41 48 39 37 47 75 87 60 RELATIVE HUMIDITY (MIN. %) 47 33 25 45 28 19 21 20 16 21 40 57 31 RELATIVE HUMIDITY (MEAN% 03UTC) 74 64 56 71 53 41 46 37 35 44 67 79 56 RELATIVE HUMIDITY (MEAN% 09UTC) 54 39 29 52 34 22 26 23 17 23 45 63 36 RELATIVE HUMIDITY (MEAN% 15UTC) 63 40 37 53 33 22 24 24 26 34 58 71 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 63.2 14.8 46.0 126.4 19.2 0.0 10.2 0.0 0.0 1.9 56.9 150.5 489.1 DAYS WITH PRECIPITATION >=10 2 0 1 4 1 0 0 0 0 0 2 4 14 DAYS WITH PRECIPITATION >= 5 4 1 3 5 1 0 1 0 0 0 4 8 27 DAYS WITH PRECIPITATION >= 1 9 4 6 11 2 0 2 0 0 1 8 15 58 DAYS WITH PRECIPITATION 12 9 9 19 3 0 6 0 0 3 13 17 91 GREATEST DAILY PRECIPITATION 19.0 5.4 23.0 45.0 16.2 0.0 7.0 0.0 0.0 1.2 16.0 32.0 45.0 DAY 12 19 19 3 4 ** 29 ** ** 30 26 9 DAY WITH THUNDER STORM 0 0 2 9 5 0 3 0 0 0 0 3 22 DAYS WITH SNOW OR SLEET 7 3 0 0 0 0 0 0 0 0 2 11 23 DAYS WITH DUST 0 0 0 0 0 0 1 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 180 180 270 180 225 270 225 45 180 45 45 180 225 PREVAILING WIND SPEED(KNOTS) 5.0 5.6 7.2 6.4 7.9 6.5 6.0 4.3 5.8 4.1 4.1 5.4 6.6 PREVAILING WIND PERCENT 5.6 8.5 6.9 8.8 16.9 12.9 13.7 8.9 11.7 14.9 10.8 8.9 8.7 CALMS PERCENT OF WIND 75.8 61.2 63.3 58.8 50.8 48.3 55.2 67.7 61.3 55.2 64.6 77.8 61.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 201 235 222 234 231 249 218 201 218 209 284 171 226 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.5 0.5 0.9 1.7 1.4 0.9 0.5 0.7 0.4 0.1 0.3 0.7 WIND STEADINESES (MEAN %) 23.1 20.8 22.7 34.6 51.5 46.7 34.6 29.4 33.3 17.4 5.6 27.3 31.8 WIND SPEED (MEAN KNOTS) 1.3 2.4 2.2 2.6 3.3 3.0 2.6 1.7 2.1 2.3 1.8 1.1 2.2 FASTEST WIND DIRECTION 180 290 140 320 270 250 270 180 330 210 220 220 320 FASTEST WIND SPEED (KNOTS) 14 19 17 37 29 17 21 16 12 17 17 14 37 DAY 5 27 23 3 11 7 26 7 21 29 18 7 DAYS WITH SKY CLEAR (0-2)/8 9 13 12 5 18 27 21 30 27 19 13 10 204 DAYS WITH P.CLOUDY (3-6)/8 14 11 15 10 9 3 10 1 3 11 6 6 99 DAYS WITH CLOUDY (7-8)/8 8 4 4 15 4 0 0 0 0 1 11 15 62 DAYS WITH VISIBILITY =< 2 KM 4 0 1 3 0 0 0 0 0 0 3 11 22 DURATION OF SUNSHINE HOURS 129.2 194.5 230.5 154.4 284.9 337.6 335.6 337.3 303.9 270.1 156.9 113.4 2848.3 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 845.8 845.1 844.1 841.8 842.7 841.6 842.6 841.6 846.1 848.0 848.8 845.5 844.5 MAX. QFE PRESSURE IN HPA 853.2 853.8 856.1 850.6 848.1 849.3 847.6 847.2 851.2 853.8 856.6 855.9 856.6 DAY-HOUR 26- 6 6- 6 11- 6 1-21 17- 6 25- 6 30- 6 31- 6 21- 9 10- 6 18- 6 3- 6 MIN. QFE PRESSURE IN HPA 838.2 837.0 836.2 832.2 838.2 833.9 836.0 836.3 841.5 842.4 841.3 833.2 832.2 DAY-HOUR 8- 3 25-12 22-15 4- 3 12-12 20-15 24-15 17-15 10-12 21-15 12-12 21-12 MEAN QNH PRESSURE IN HPA 1019.1 1018.3 1017.0 1014.4 1015.4 1014.1 1015.3 1014.2 1019.5 1021.6 1022.6 1018.7 1017.5 MAX. QNH PRESSURE IN HPA 1027.7 1028.4 1031.0 1024.6 1021.7 1023.1 1021.2 1020.7 1025.3 1028.4 1031.6 1030.8 1031.6 DAY-HOUR 26- 6 6- 6 11- 6 1-21 17- 6 25- 6 30- 6 31- 6 21- 9 10- 6 18- 6 3- 6 MIN. QNH PRESSURE IN HPA 1010.2 1008.8 1007.9 1003.2 1010.2 1005.2 1007.7 1008.0 1014.1 1015.1 1013.8 1004.4 1003.2 DAY-HOUR 8- 3 25-12 22-15 4- 3 12-12 20-15 24-15 17-15 10-12 21-15 12-12 21-12 MEAN QFF PRESSURE IN HPA 1020.3 1017.0 1012.8 1008.7 1005.7 1001.0 1000.5 998.9 1006.4 1011.9 1019.2 1020.4 1010.2 MAX. QFF PRESSURE IN HPA 1030.2 1027.9 1029.6 1020.7 1013.6 1010.9 1009.7 1007.6 1014.3 1018.1 1029.7 1031.9 1031.9 DAY-HOUR 26- 3 19- 6 11- 6 1- 3 9- 9 25- 6 30- 6 31- 6 30- 3 31-15 18- 6 3- 6 MIN. QFF PRESSURE IN HPA 1008.2 1004.7 999.6 1001.0 997.9 991.2 992.9 992.0 1000.4 1005.7 1006.8 1005.0 991.2 DAY-HOUR 8- 0 26-21 28- 9 4-12 29-15 20- 0 24-18 8-15 10-12 22- 0 12- 9 21-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 845.7 844.7 843.7 841.5 842.3 841.5 842.3 841.4 845.8 847.8 848.5 845.3 844.2 MAX. QFE PRESSURE IN HPA 852.1 852.7 855.2 847.8 846.3 847.7 847.0 845.1 849.8 852.6 855.2 853.6 855.2 DAY 26 6 11 2 18 25 30 1 23 10 18 3 MIN. QFE PRESSURE IN HPA 838.6 838.7 837.2 832.4 838.5 834.2 837.6 837.2 842.3 842.6 842.4 834.6 832.4 DAY 8 27 29 4 13 20 25 17 11 22 12 22 MEAN QNH PRESSURE IN HPA 1019.0 1017.7 1016.7 1014.1 1015.0 1014.0 1015.0 1013.9 1019.1 1021.4 1022.2 1018.4 1017.2 MAX. QNH PRESSURE IN HPA 1026.4 1027.1 1030.0 1021.4 1019.6 1021.3 1020.5 1018.2 1023.7 1027.0 1030.0 1028.1 1030.0 DAY 26 6 11 2 18 25 30 1 23 10 18 3 MIN. QNH PRESSURE IN HPA 1010.7 1010.8 1009.1 1003.5 1010.6 1005.6 1009.5 1009.1 1015.0 1015.3 1015.1 1006.0 1003.5 DAY 8 27 29 4 13 20 25 17 11 22 12 22 MEAN QFF PRESSURE IN HPA 1019.8 1016.2 1012.2 1008.4 1005.4 1000.8 1000.0 998.4 1005.6 1011.3 1018.3 1019.8 1009.7 MAX. QFF PRESSURE IN HPA 1028.8 1025.8 1027.8 1018.0 1010.1 1009.6 1007.0 1003.7 1010.7 1015.7 1028.0 1030.9 1030.9 DAY 26 6 11 1 14 25 30 1 29 31 18 5 MIN. QFF PRESSURE IN HPA 1008.2 1005.1 1002.8 1002.9 998.8 991.2 993.6 993.0 1000.8 1005.7 1007.4 1006.8 991.2 DAY 8 27 27 4 30 20 25 8 11 22 12 22 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 845.7 844.9 844.1 841.9 843.0 842.3 843.2 842.1 846.5 848.2 848.8 845.3 844.7 MAX. QFE PRESSURE IN HPA 852.1 852.6 855.4 849.2 847.4 848.3 846.9 845.6 850.4 853.0 855.4 854.4 855.4 DAY 26 6 11 1 17 25 29 31 23 10 18 3 MIN. QFE PRESSURE IN HPA 838.2 838.8 837.8 832.2 839.0 835.6 838.8 837.3 842.9 843.5 842.4 835.5 832.2 DAY 8 27 22 4 13 20 25 18 18 22 12 22 MEAN QNH PRESSURE IN HPA 1019.0 1018.0 1017.1 1014.5 1015.8 1015.0 1016.0 1014.8 1019.8 1021.8 1022.5 1018.4 1017.7 MAX. QNH PRESSURE IN HPA 1026.4 1027.0 1030.2 1023.0 1020.9 1022.0 1020.3 1018.8 1024.4 1027.4 1030.2 1029.1 1030.2 DAY 26 6 11 1 17 25 29 31 23 10 18 3 MIN. QNH PRESSURE IN HPA 1010.2 1010.9 1009.7 1003.2 1011.1 1007.2 1010.9 1009.2 1015.7 1016.4 1015.1 1007.1 1003.2 DAY 8 27 22 4 13 20 25 18 18 22 12 22 MEAN QFF PRESSURE IN HPA 1020.8 1017.5 1013.7 1009.3 1006.5 1002.1 1001.4 1000.0 1007.8 1013.3 1020.0 1020.6 1011.1 MAX. QFF PRESSURE IN HPA 1030.2 1026.7 1029.5 1020.7 1011.8 1010.1 1007.1 1005.6 1014.3 1017.6 1029.5 1031.3 1031.3 DAY 26 19 11 1 14 25 31 31 30 10 18 5 MIN. QFF PRESSURE IN HPA 1008.7 1006.5 1003.8 1002.9 1000.3 993.5 995.9 994.0 1003.5 1008.4 1008.5 1008.7 993.5 DAY 8 27 28 19 20 21 25 18 11 14 12 22 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 846.7 846.0 845.0 842.6 843.7 842.8 843.8 842.8 847.3 849.1 849.8 846.4 845.5 MAX. QFE PRESSURE IN HPA 853.2 853.8 856.1 850.1 848.1 849.3 847.6 847.2 851.1 853.8 856.6 855.9 856.6 DAY 26 6 11 1 17 25 30 31 30 10 18 3 MIN. QFE PRESSURE IN HPA 838.8 839.7 838.5 833.0 839.8 836.1 838.8 837.6 843.6 844.6 843.0 837.0 833.0 DAY 8 25 22 4 20 20 24 17 10 22 12 22 MEAN QNH PRESSURE IN HPA 1020.1 1019.3 1018.2 1015.3 1016.6 1015.6 1016.7 1015.6 1020.8 1022.9 1023.7 1019.7 1018.7 MAX. QNH PRESSURE IN HPA 1027.7 1028.4 1031.0 1024.1 1021.7 1023.1 1021.2 1020.7 1025.2 1028.4 1031.6 1030.8 1031.6 DAY 26 6 11 1 17 25 30 31 30 10 18 3 MIN. QNH PRESSURE IN HPA 1010.9 1012.0 1010.6 1004.2 1012.1 1007.8 1010.9 1009.5 1016.5 1017.7 1015.8 1008.8 1004.2 DAY 8 25 22 4 20 20 24 17 10 22 12 22 MEAN QFF PRESSURE IN HPA 1021.3 1018.1 1013.9 1009.5 1006.6 1002.3 1001.8 1000.4 1007.6 1013.0 1020.3 1021.6 1011.4 MAX. QFF PRESSURE IN HPA 1030.1 1027.9 1029.6 1020.0 1013.3 1010.9 1009.7 1007.6 1013.8 1016.4 1029.7 1031.9 1031.9 DAY 26 19 11 1 14 25 30 31 30 10 18 3 MIN. QFF PRESSURE IN HPA 1008.9 1008.2 1003.4 1003.6 1000.0 994.0 995.4 993.5 1002.8 1008.7 1008.9 1010.6 993.5 DAY 8 25 28 4 20 20 24 17 10 22 12 22 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 846.1 845.7 844.5 842.2 843.3 842.2 843.3 842.3 846.7 848.3 848.9 845.7 844.9 MAX. QFE PRESSURE IN HPA 852.2 852.8 855.0 850.2 848.1 848.8 847.0 846.9 851.2 853.4 855.8 855.1 855.8 DAY 26 6 11 1 17 25 30 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 838.9 838.9 836.6 832.4 838.9 835.6 838.5 837.3 843.0 844.1 841.6 836.0 832.4 DAY 8 25 28 4 20 20 25 17 10 22 12 21 MEAN QNH PRESSURE IN HPA 1019.4 1019.0 1017.6 1014.9 1016.1 1014.9 1016.2 1015.0 1020.1 1022.0 1022.7 1018.9 1018.1 MAX. QNH PRESSURE IN HPA 1026.5 1027.2 1029.8 1024.2 1021.7 1022.5 1020.5 1020.3 1025.3 1027.9 1030.7 1029.9 1030.7 DAY 26 6 11 1 17 25 30 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1011.0 1011.0 1008.4 1003.5 1011.0 1007.2 1010.6 1009.2 1015.8 1017.1 1014.2 1007.7 1003.5 DAY 8 25 28 4 20 20 25 17 10 22 12 21 MEAN QFF PRESSURE IN HPA 1020.1 1017.4 1012.9 1008.9 1006.2 1001.5 1001.2 999.5 1006.7 1011.8 1018.9 1020.3 1010.5 MAX. QFF PRESSURE IN HPA 1028.2 1027.3 1028.0 1019.6 1013.6 1010.4 1008.2 1007.0 1012.7 1016.1 1028.3 1031.0 1031.0 DAY 26 19 11 1 9 25 30 31 30 10 18 3 MIN. QFF PRESSURE IN HPA 1009.2 1006.8 999.6 1002.3 998.7 993.5 994.8 993.2 1001.8 1008.0 1006.8 1008.7 993.2 DAY 8 26 28 4 20 20 25 17 10 21 12 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 845.1 844.5 843.4 841.5 842.2 841.0 842.0 841.1 845.5 847.2 848.0 844.8 843.8 MAX. QFE PRESSURE IN HPA 851.6 851.7 853.2 848.8 846.9 846.9 845.3 844.9 849.2 852.2 855.2 854.2 855.2 DAY 27 6 11 1 17 25 29 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 838.4 837.0 837.2 832.2 838.2 834.4 837.4 836.5 841.5 843.2 841.3 833.2 832.2 DAY 8 25 21 4 12 20 24 17 10 21 12 21 MEAN QNH PRESSURE IN HPA 1018.3 1017.5 1016.3 1014.0 1014.8 1013.4 1014.6 1013.6 1018.7 1020.7 1021.7 1017.9 1016.8 MAX. QNH PRESSURE IN HPA 1025.8 1025.9 1027.7 1022.5 1020.3 1020.3 1018.5 1018.0 1023.0 1026.5 1030.0 1028.8 1030.0 DAY 27 6 11 1 17 25 29 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1010.4 1008.8 1009.1 1003.2 1010.2 1005.8 1009.3 1008.2 1014.1 1016.0 1013.8 1004.4 1003.2 DAY 8 25 21 4 12 20 24 17 10 21 12 21 MEAN QFF PRESSURE IN HPA 1019.2 1015.9 1011.8 1008.2 1005.0 1000.2 999.6 998.0 1005.3 1010.6 1018.0 1019.3 1009.3 MAX. QFF PRESSURE IN HPA 1027.5 1024.3 1025.8 1017.5 1011.3 1008.5 1005.3 1004.4 1011.3 1015.0 1027.8 1030.1 1030.1 DAY 14 19 11 1 9 25 30 31 30 10 18 3 MIN. QFF PRESSURE IN HPA 1008.8 1005.1 1002.9 1001.0 998.2 992.1 993.9 992.3 1000.4 1006.5 1007.4 1005.0 992.1 DAY 8 25 27 4 29 20 25 8 10 21 12 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 845.6 844.7 843.5 841.2 841.8 840.4 841.4 840.6 845.2 847.4 848.6 845.3 843.8 MAX. QFE PRESSURE IN HPA 852.4 852.1 852.9 848.4 846.4 846.4 845.1 844.7 849.1 852.6 855.3 854.2 855.3 DAY 27 6 11 1 17 24 29 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 839.9 837.6 836.2 832.4 838.2 833.9 836.0 836.3 841.5 842.4 842.3 833.6 832.4 DAY 22 25 22 4 12 20 24 17 10 21 13 21 MEAN QNH PRESSURE IN HPA 1018.9 1017.8 1016.4 1013.8 1014.5 1012.8 1014.0 1013.0 1018.4 1020.9 1022.3 1018.4 1016.7 MAX. QNH PRESSURE IN HPA 1026.7 1026.4 1027.3 1022.1 1019.8 1019.8 1018.2 1017.8 1022.9 1027.0 1030.1 1028.8 1030.1 DAY 27 6 11 1 17 24 29 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1012.2 1009.5 1007.9 1003.5 1010.2 1005.2 1007.7 1008.0 1014.1 1015.1 1015.0 1004.9 1003.5 DAY 22 25 22 4 12 20 24 17 10 21 13 21 MEAN QFF PRESSURE IN HPA 1020.7 1017.1 1013.0 1008.5 1005.1 1000.0 999.4 998.1 1006.3 1012.3 1019.8 1020.6 1010.1 MAX. QFF PRESSURE IN HPA 1030.1 1025.9 1027.0 1018.0 1010.4 1007.8 1005.1 1004.9 1013.2 1018.1 1029.7 1030.8 1030.8 DAY 14 5 11 1 9 24 30 31 30 31 18 14 MIN. QFF PRESSURE IN HPA 1009.9 1005.7 1003.3 1002.2 997.9 992.3 993.0 992.0 1002.2 1007.2 1009.7 1005.7 992.0 DAY 7 25 28 4 29 20 24 8 10 21 12 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 846.0 845.4 844.3 842.0 842.6 841.2 842.2 841.3 846.0 848.1 849.2 845.7 844.5 MAX. QFE PRESSURE IN HPA 853.0 852.3 853.6 848.9 847.0 847.8 846.7 845.9 850.2 853.1 856.0 854.2 856.0 DAY 27 6 10 1 17 24 29 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 840.8 838.5 836.5 833.0 839.0 834.3 836.4 836.9 842.1 842.9 843.1 834.6 833.0 DAY 7 26 22 3 12 20 24 17 10 21 13 21 MEAN QNH PRESSURE IN HPA 1019.3 1018.6 1017.3 1014.7 1015.3 1013.7 1014.9 1013.8 1019.3 1021.7 1023.0 1019.0 1017.6 MAX. QNH PRESSURE IN HPA 1027.4 1026.6 1028.1 1022.7 1020.5 1021.4 1020.1 1019.2 1024.2 1027.6 1030.9 1028.8 1030.9 DAY 27 6 10 1 17 24 29 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1013.2 1010.6 1008.2 1004.2 1011.1 1005.7 1008.1 1008.7 1014.8 1015.7 1015.9 1006.0 1004.2 DAY 7 26 22 3 12 20 24 17 10 21 13 21 MEAN QFF PRESSURE IN HPA 1020.6 1017.3 1012.9 1008.8 1005.3 1000.4 1000.0 998.6 1006.1 1011.8 1019.7 1020.8 1010.2 MAX. QFF PRESSURE IN HPA 1028.6 1026.6 1026.7 1016.4 1010.9 1008.9 1007.7 1006.1 1012.2 1016.0 1029.2 1031.5 1031.5 DAY 14 4 10 1 17 24 29 31 30 31 18 4 MIN. QFF PRESSURE IN HPA 1010.9 1005.7 1002.4 1003.0 998.0 991.9 992.9 992.7 1001.8 1006.0 1009.8 1007.6 991.9 DAY 7 26 28 3 29 20 24 17 10 21 12 21 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 845.8 845.3 844.2 842.0 842.6 841.4 842.6 841.4 846.2 848.1 849.0 845.5 844.5 MAX. QFE PRESSURE IN HPA 852.2 852.4 854.6 850.6 846.8 847.8 846.7 846.1 850.5 852.7 856.0 854.0 856.0 DAY 27 5 10 1 17 24 29 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 839.2 838.5 836.4 832.8 838.6 834.2 838.0 836.7 842.1 843.2 843.3 834.5 832.8 DAY 7 26 22 3 12 20 24 17 10 21 12 21 MEAN QNH PRESSURE IN HPA 1019.1 1018.4 1017.2 1014.6 1015.3 1013.9 1015.4 1014.0 1019.5 1021.7 1022.8 1018.7 1017.5 MAX. QNH PRESSURE IN HPA 1026.5 1026.7 1029.3 1024.6 1020.2 1021.4 1020.1 1019.4 1024.5 1027.1 1030.9 1028.6 1030.9 DAY 27 5 10 1 17 24 29 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1011.4 1010.6 1008.1 1003.9 1010.7 1005.6 1010.0 1008.5 1014.8 1016.0 1016.1 1005.9 1003.9 DAY 7 26 22 3 12 20 24 17 10 21 12 21 MEAN QFF PRESSURE IN HPA 1020.0 1016.8 1012.4 1008.6 1005.3 1000.5 1000.4 998.5 1006.1 1011.5 1019.0 1020.2 1009.9 MAX. QFF PRESSURE IN HPA 1028.8 1026.7 1026.9 1018.7 1010.6 1008.7 1006.8 1005.8 1011.5 1014.8 1028.6 1031.2 1031.2 DAY 25 4 10 1 17 24 29 31 30 25 18 4 MIN. QFF PRESSURE IN HPA 1008.4 1004.7 1003.0 1002.5 998.2 991.7 994.7 992.3 1000.8 1006.2 1008.5 1006.8 991.7 DAY 7 26 28 3 29 19 24 17 10 21 11 21 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.4 4.6 7.9 14.4 18.2 25.0 30.0 26.9 22.6 18.7 8.6 3.8 15.4 MINIMUN AIR TEMPERATURE (C) 0.9 1.2 3.9 10.3 12.3 18.9 24.0 20.8 16.6 13.3 4.4 0.9 10.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 10 28 15 0 0 0 0 53 DAYS WITH MINIMUM TEMP. <=-4 0 0 1 0 0 0 0 0 0 0 0 2 3 DAYS WITH FREEZING MIN.<= 0 13 9 3 0 0 0 0 0 0 0 2 14 41 TEMPERATURE RECORDS LOWEST(C) -3.2 -3.6 -4.6 2.6 5.0 12.0 20.0 19.0 12.0 11.0 -0.6 -5.6 -5.6 DAY 21 18 2 18 1 7 3 31 29 6 24 14 MAXIMUM AIR TEMPERATURE (C) 8.9 8.7 12.5 18.8 23.9 30.7 35.9 33.1 29.0 25.0 13.8 7.5 20.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 19 31 31 15 0 0 0 96 DAYS WITH MAXIMUM TEMP. <= 0 0 1 0 0 0 0 0 0 0 0 0 1 2 TEMPERATURE RECORDS HIGHEST(C) 16.2 13.4 18.4 27.2 28.8 35.4 39.8 36.2 33.2 29.0 19.2 14.2 39.8 DAY 13 9 25 7 22 23 17 15 7 2 1 19 DIF. BETWEEN (MAX.-MIN.) (C) 8.0 7.5 8.6 8.5 11.6 11.8 11.9 12.3 12.4 11.7 9.4 6.6 10.1 MEAN DAILY TEMP. (MDT) (C) 4.9 5.0 8.2 14.6 18.1 24.8 29.9 26.9 22.8 19.2 9.1 4.2 15.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.8 7.4 118.6 276.8 183.9 68.0 4.4 0.0 0.0 661.0 HEATING DEG. DAYS(BASE 18 0C) 407.5 364.3 303.8 119.9 34.1 0.0 0.0 0.0 0.0 8.5 266.8 428.2 1933.1 DEWPOINT (MEAN C) -2.6 -3.0 -2.6 3.6 3.6 6.3 9.5 8.7 6.0 3.1 -1.1 -1.5 2.5 MIXING RATIO (G/KG) 3.77 3.73 3.93 6.08 6.09 7.30 9.06 8.51 7.08 5.79 4.35 4.22 5.83 VAPOUR PRESSURE (HPA) 5.09 5.02 5.29 8.16 8.19 9.75 12.04 11.39 9.51 7.81 5.88 5.72 7.82 SATURATION DEF. (HPA) 3.52 3.68 5.69 9.01 13.49 23.07 31.37 25.01 18.96 14.40 5.72 2.54 13.04 RELATIVE HUMIDITY (MEAN %) 63 61 51 53 41 32 30 33 36 39 53 71 47 RELATIVE HUMIDITY (MAX. %) 78 77 71 71 60 48 43 47 50 54 71 85 63 RELATIVE HUMIDITY (MIN. %) 46 43 32 38 26 20 19 22 24 21 35 55 32 RELATIVE HUMIDITY (MEAN% 03UTC) 72 70 62 64 56 47 42 46 48 51 68 78 59 RELATIVE HUMIDITY (MEAN% 09UTC) 52 53 42 46 31 24 23 25 26 25 38 61 37 RELATIVE HUMIDITY (MEAN% 15UTC) 62 58 44 46 32 24 24 28 34 38 53 70 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 54.5 99.1 86.4 157.9 36.7 0.0 0.0 0.1 0.0 23.4 19.4 77.7 555.2 DAYS WITH PRECIPITATION >=10 2 5 4 6 1 0 0 0 0 0 1 3 22 DAYS WITH PRECIPITATION >= 5 4 7 4 7 3 0 0 0 0 3 2 7 37 DAYS WITH PRECIPITATION >= 1 5 9 6 11 5 0 0 0 0 4 2 13 55 DAYS WITH PRECIPITATION 9 14 12 15 9 1 0 2 0 8 7 16 93 GREATEST DAILY PRECIPITATION 22.3 19.0 33.0 39.0 14.0 0.0 0.0 0.1 0.0 7.3 11.0 16.5 39.0 DAY 28 14 26 16 27 ** ** 21 ** 30 29 27 DAY WITH THUNDER STORM 0 1 3 6 5 0 0 2 0 2 0 0 19 DAYS WITH SNOW OR SLEET 6 8 2 0 0 0 0 0 0 0 1 8 25 DAYS WITH DUST 0 0 0 0 1 0 0 1 0 0 0 0 2 WIND DIRECTION (PREVAILING) 45 270 180 225 180 180 45 45 180 45 180 180 180 PREVAILING WIND SPEED(KNOTS) 4.0 7.9 5.2 6.5 6.8 6.1 4.2 4.1 5.5 4.1 4.9 5.3 5.7 PREVAILING WIND PERCENT 7.3 7.6 12.5 8.3 14.9 9.6 11.7 8.9 11.3 12.9 7.1 6.5 8.5 CALMS PERCENT OF WIND 73.0 63.4 48.8 63.3 52.8 68.3 62.1 63.7 62.9 56.0 73.3 77.4 63.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 138 253 230 217 200 217 247 246 214 281 229 248 228 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.5 1.1 0.5 1.0 0.9 0.4 0.4 0.7 0.5 0.5 0.2 0.5 WIND STEADINESES (MEAN %) 8.3 22.7 35.5 22.7 34.5 47.4 22.2 22.2 36.8 20.8 33.3 15.4 25.0 WIND SPEED (MEAN KNOTS) 1.2 2.2 3.1 2.2 2.9 1.9 1.8 1.8 1.9 2.4 1.5 1.3 2.0 FASTEST WIND DIRECTION 190 190 250 280 210 190 260 10 250 210 360 350 250 FASTEST WIND SPEED (KNOTS) 10 17 29 19 23 19 10 12 14 17 21 19 29 DAY 14 5 13 29 22 4 27 20 3 25 14 11 DAYS WITH SKY CLEAR (0-2)/8 12 7 6 5 11 23 24 28 27 20 16 8 187 DAYS WITH P.CLOUDY (3-6)/8 7 6 13 8 17 6 7 3 3 6 7 12 95 DAYS WITH CLOUDY (7-8)/8 12 15 12 17 3 1 0 0 0 5 7 11 83 DAYS WITH VISIBILITY =< 2 KM 5 5 0 0 0 0 0 0 0 0 2 9 21 DURATION OF SUNSHINE HOURS 136.9 114.1 185.3 141.6 277.4 321.8 331.0 338.9 296.6 240.3 183.8 113.5 2681.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 845.5 841.9 843.0 844.4 845.4 841.3 839.1 843.7 845.3 847.3 848.4 848.4 844.5 MAX. QFE PRESSURE IN HPA 852.3 848.4 852.5 850.8 852.7 846.2 845.8 848.2 852.6 853.2 858.0 857.1 858.0 DAY-HOUR 12- 6 6-18 2- 9 8- 6 2- 6 9- 6 3- 6 30- 6 27- 6 15- 6 25- 6 12- 6 MIN. QFE PRESSURE IN HPA 833.0 832.3 830.8 839.1 839.7 834.5 834.7 838.0 839.4 841.1 840.4 839.4 830.8 DAY-HOUR 28-12 19- 3 26-12 20-15 23-12 30-18 1- 0 1- 0 7-15 27-15 14-12 6-12 MEAN QNH PRESSURE IN HPA 1018.7 1014.6 1015.8 1017.4 1018.6 1013.8 1011.2 1016.6 1018.4 1020.8 1022.1 1022.1 1017.5 MAX. QNH PRESSURE IN HPA 1026.6 1022.1 1026.9 1024.9 1027.1 1019.5 1019.1 1021.8 1027.0 1027.7 1033.2 1032.2 1033.2 DAY-HOUR 12- 6 6-18 2- 9 8- 6 2- 6 9- 6 3- 6 30- 6 27- 6 15- 6 25- 6 12- 6 MIN. QNH PRESSURE IN HPA 1004.2 1003.4 1001.6 1011.3 1012.0 1005.9 1006.1 1010.0 1011.6 1013.6 1012.8 1011.6 1001.6 DAY-HOUR 28-12 19- 3 26-12 20-15 23-12 30-18 1- 0 1- 0 7-15 27-15 14-12 6-12 MEAN QFF PRESSURE IN HPA 1019.0 1014.5 1013.6 1011.0 1009.8 1000.7 995.1 1002.3 1006.8 1011.8 1019.5 1022.8 1010.6 MAX. QFF PRESSURE IN HPA 1026.1 1023.9 1030.5 1017.9 1022.2 1010.0 1004.8 1008.7 1018.6 1018.7 1034.3 1037.3 1037.3 DAY-HOUR 23- 6 12-18 2- 6 19- 6 2- 6 7- 6 4- 6 30- 6 27- 6 15- 3 25- 3 12- 6 MIN. QFF PRESSURE IN HPA 1005.4 1003.6 995.4 1002.8 1000.7 991.4 990.0 994.8 997.9 1004.2 1007.7 1010.6 990.0 DAY-HOUR 28-15 20-12 26-12 27-15 23-12 30-18 30-21 1- 0 7-12 27- 0 14-12 6-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 845.1 841.6 842.7 843.9 845.1 841.2 838.8 843.4 845.1 847.1 848.1 848.1 844.2 MAX. QFE PRESSURE IN HPA 851.8 847.5 851.5 849.7 851.2 844.8 844.8 846.4 851.4 852.0 856.6 856.4 856.6 DAY 12 13 3 8 2 1 4 4 27 15 25 12 MIN. QFE PRESSURE IN HPA 835.0 833.3 834.7 839.6 840.0 836.0 834.7 838.0 840.1 841.6 842.1 841.5 833.3 DAY 29 19 13 21 8 30 1 1 7 27 14 7 MEAN QNH PRESSURE IN HPA 1018.3 1014.1 1015.4 1016.9 1018.3 1013.7 1010.9 1016.3 1018.3 1020.5 1021.7 1021.7 1017.2 MAX. QNH PRESSURE IN HPA 1026.0 1021.0 1025.7 1023.6 1025.3 1017.9 1017.9 1019.8 1025.6 1026.3 1031.6 1031.4 1031.6 DAY 12 13 3 8 2 1 4 4 27 15 25 12 MIN. QNH PRESSURE IN HPA 1006.5 1004.5 1006.1 1011.8 1012.3 1007.7 1006.1 1010.0 1012.4 1014.2 1014.8 1014.1 1004.5 DAY 29 19 13 21 8 30 1 1 7 27 14 7 MEAN QFF PRESSURE IN HPA 1018.3 1013.6 1013.1 1010.2 1009.5 1000.6 994.6 1001.8 1006.2 1010.9 1018.5 1022.1 1009.9 MAX. QFF PRESSURE IN HPA 1024.9 1021.1 1028.7 1016.4 1019.9 1007.7 1002.7 1006.3 1016.3 1016.5 1031.7 1035.1 1035.1 DAY 23 13 3 30 2 7 4 4 27 15 25 12 MIN. QFF PRESSURE IN HPA 1008.3 1007.0 1002.3 1003.7 1003.0 992.4 990.3 994.8 998.7 1004.2 1008.7 1011.8 990.3 DAY 16 20 13 28 8 30 31 1 7 27 14 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 845.2 841.9 843.1 844.3 845.8 841.9 839.5 844.4 845.7 847.5 848.4 848.2 844.7 MAX. QFE PRESSURE IN HPA 851.4 847.2 851.3 850.2 852.0 845.3 845.6 847.4 852.0 852.2 857.0 855.8 857.0 DAY 12 7 3 8 2 7 4 4 27 15 25 12 MIN. QFE PRESSURE IN HPA 837.0 832.3 834.8 840.0 840.0 836.3 835.3 839.0 840.1 841.9 842.1 841.8 832.3 DAY 29 19 13 14 8 30 1 1 7 27 14 6 MEAN QNH PRESSURE IN HPA 1018.4 1014.5 1016.0 1017.3 1019.0 1014.5 1011.7 1017.4 1019.0 1021.0 1022.1 1021.8 1017.7 MAX. QNH PRESSURE IN HPA 1025.6 1020.7 1025.5 1024.2 1026.3 1018.5 1018.8 1020.9 1026.3 1026.5 1032.1 1030.7 1032.1 DAY 12 7 3 8 2 7 4 4 27 15 25 12 MIN. QNH PRESSURE IN HPA 1008.8 1003.4 1006.3 1012.3 1012.3 1008.0 1006.8 1011.1 1012.4 1014.5 1014.8 1014.4 1003.4 DAY 29 19 13 14 8 30 1 1 7 27 14 6 MEAN QFF PRESSURE IN HPA 1019.4 1014.9 1014.4 1011.3 1010.7 1001.7 995.9 1003.7 1008.3 1013.1 1020.5 1023.0 1011.4 MAX. QFF PRESSURE IN HPA 1025.3 1021.7 1029.4 1017.3 1021.5 1008.8 1004.4 1008.0 1018.4 1018.7 1034.3 1035.1 1035.1 DAY 23 7 3 19 2 7 4 4 27 15 25 12 MIN. QFF PRESSURE IN HPA 1008.2 1006.6 1004.0 1003.9 1003.9 993.4 991.9 996.6 1000.1 1006.5 1010.5 1011.2 991.9 DAY 16 19 13 28 8 30 30 1 7 27 14 19 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 846.3 842.9 844.0 845.3 846.3 842.6 840.2 845.0 846.5 848.5 849.4 849.4 845.5 MAX. QFE PRESSURE IN HPA 852.3 848.1 852.2 850.8 852.7 846.2 845.8 848.2 852.6 853.2 858.0 857.1 858.0 DAY 12 12 2 8 2 9 3 30 27 15 25 12 MIN. QFE PRESSURE IN HPA 838.8 832.8 835.6 840.8 840.6 836.6 836.4 839.6 840.9 843.2 842.6 841.1 832.8 DAY 29 19 13 14 8 30 1 1 7 27 14 6 MEAN QNH PRESSURE IN HPA 1019.7 1015.7 1017.0 1018.5 1019.6 1015.4 1012.5 1018.2 1019.9 1022.2 1023.2 1023.3 1018.8 MAX. QNH PRESSURE IN HPA 1026.6 1021.7 1026.5 1024.9 1027.1 1019.5 1019.1 1021.8 1027.0 1027.7 1033.2 1032.2 1033.2 DAY 12 12 2 8 2 9 3 30 27 15 25 12 MIN. QNH PRESSURE IN HPA 1010.9 1003.9 1007.2 1013.2 1013.0 1008.4 1008.1 1011.8 1013.4 1016.0 1015.3 1013.6 1003.9 DAY 29 19 13 14 8 30 1 1 7 27 14 6 MEAN QFF PRESSURE IN HPA 1020.2 1015.8 1014.9 1012.0 1010.7 1002.3 996.4 1003.8 1008.3 1013.0 1020.7 1024.3 1011.9 MAX. QFF PRESSURE IN HPA 1026.1 1022.9 1030.5 1017.9 1022.2 1010.0 1004.8 1008.7 1018.6 1017.7 1033.8 1037.3 1037.3 DAY 23 12 2 19 2 7 4 30 27 15 25 12 MIN. QFF PRESSURE IN HPA 1011.3 1007.1 1003.9 1005.3 1004.3 993.8 992.0 996.6 999.2 1007.6 1010.7 1012.6 992.0 DAY 16 19 26 28 23 30 30 1 7 26 14 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 845.8 842.4 843.5 844.9 845.9 842.0 839.8 844.3 845.9 847.7 848.5 848.5 844.9 MAX. QFE PRESSURE IN HPA 852.0 848.0 852.5 849.5 851.9 845.6 845.4 847.3 852.1 852.4 856.9 856.0 856.9 DAY 12 12 2 8 2 9 3 30 27 15 25 12 MIN. QFE PRESSURE IN HPA 837.4 832.4 834.5 840.8 840.4 836.9 836.2 840.8 840.6 842.3 841.8 840.4 832.4 DAY 28 19 26 14 8 30 1 1 7 27 14 6 MEAN QNH PRESSURE IN HPA 1019.0 1015.1 1016.4 1018.0 1019.1 1014.7 1012.0 1017.4 1019.1 1021.3 1022.2 1022.2 1018.0 MAX. QNH PRESSURE IN HPA 1026.3 1021.6 1026.9 1023.4 1026.2 1018.8 1018.6 1020.8 1026.4 1026.7 1032.0 1030.9 1032.0 DAY 12 12 2 8 2 9 3 30 27 15 25 12 MIN. QNH PRESSURE IN HPA 1009.3 1003.5 1005.9 1013.2 1012.8 1008.7 1007.9 1013.2 1013.0 1015.0 1014.4 1012.8 1003.5 DAY 28 19 26 14 8 30 1 1 7 27 14 6 MEAN QFF PRESSURE IN HPA 1018.8 1014.7 1013.9 1011.2 1010.1 1001.5 995.8 1002.9 1007.2 1011.7 1019.2 1022.5 1010.8 MAX. QFF PRESSURE IN HPA 1025.0 1021.7 1030.5 1016.6 1020.8 1009.2 1003.3 1007.5 1017.5 1016.8 1031.9 1036.1 1036.1 DAY 31 28 2 19 2 7 3 30 27 15 25 12 MIN. QFF PRESSURE IN HPA 1010.4 1006.1 1000.7 1004.5 1002.6 994.1 991.2 998.5 999.2 1005.8 1009.4 1011.4 991.2 DAY 16 19 26 28 23 30 30 1 7 26 14 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 844.7 841.3 842.3 844.0 844.7 840.8 838.7 843.0 844.5 846.6 847.6 847.7 843.8 MAX. QFE PRESSURE IN HPA 850.4 846.7 851.9 849.9 850.5 844.8 844.1 845.8 850.7 851.8 856.4 854.5 856.4 DAY 11 12 2 8 2 9 3 30 27 15 25 12 MIN. QFE PRESSURE IN HPA 833.0 832.5 830.8 840.4 839.7 835.8 835.6 840.2 839.5 841.7 840.4 839.4 830.8 DAY 28 19 26 14 23 30 26 1 7 27 14 6 MEAN QNH PRESSURE IN HPA 1017.8 1013.8 1015.0 1017.0 1017.7 1013.3 1010.8 1015.8 1017.6 1019.9 1021.2 1021.3 1016.8 MAX. QNH PRESSURE IN HPA 1024.4 1020.1 1026.2 1023.8 1024.5 1017.9 1017.1 1019.1 1024.8 1026.0 1031.4 1029.2 1031.4 DAY 11 12 2 8 2 9 3 30 27 15 25 12 MIN. QNH PRESSURE IN HPA 1004.2 1003.6 1001.6 1012.8 1012.0 1007.4 1007.2 1012.5 1011.7 1014.3 1012.8 1011.6 1001.6 DAY 28 19 26 14 23 30 26 1 7 27 14 6 MEAN QFF PRESSURE IN HPA 1017.7 1013.4 1012.5 1010.3 1008.9 1000.1 994.5 1001.2 1005.5 1010.5 1018.1 1021.7 1009.5 MAX. QFF PRESSURE IN HPA 1024.9 1020.5 1029.5 1015.4 1019.0 1007.6 1002.2 1005.4 1015.9 1017.1 1031.3 1034.1 1034.1 DAY 22 12 2 18 2 7 3 30 27 15 25 12 MIN. QFF PRESSURE IN HPA 1005.7 1003.6 995.4 1005.0 1000.7 993.0 990.1 997.5 997.9 1004.7 1007.7 1010.6 990.1 DAY 28 20 26 27 23 30 30 1 7 2 14 6 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 845.4 841.6 842.3 843.8 844.5 840.1 838.1 842.5 844.2 846.7 848.2 848.4 843.8 MAX. QFE PRESSURE IN HPA 851.0 847.9 851.7 849.4 850.5 844.1 843.5 845.6 850.1 852.0 856.9 855.3 856.9 DAY 11 12 2 8 2 3 3 30 26 15 25 11 MIN. QFE PRESSURE IN HPA 833.0 833.0 832.6 839.1 839.7 834.7 835.0 839.3 839.4 841.1 841.6 840.1 832.6 DAY 28 19 26 20 28 30 30 1 7 27 14 6 MEAN QNH PRESSURE IN HPA 1018.5 1014.2 1015.0 1016.7 1017.5 1012.5 1010.1 1015.2 1017.2 1020.1 1021.8 1022.1 1016.7 MAX. QNH PRESSURE IN HPA 1025.1 1021.5 1025.9 1023.2 1024.5 1017.1 1016.4 1018.8 1024.1 1026.3 1032.0 1030.1 1032.0 DAY 11 12 2 8 2 3 3 30 26 15 25 11 MIN. QNH PRESSURE IN HPA 1004.2 1004.2 1003.7 1011.3 1012.0 1006.1 1006.5 1011.5 1011.6 1013.6 1014.2 1012.4 1003.7 DAY 28 19 26 20 28 30 30 1 7 27 14 6 MEAN QFF PRESSURE IN HPA 1019.4 1014.6 1013.3 1010.7 1009.3 999.7 994.3 1001.5 1006.4 1012.2 1020.3 1023.2 1010.4 MAX. QFF PRESSURE IN HPA 1025.7 1023.6 1030.5 1016.4 1019.8 1006.5 1002.1 1006.4 1016.2 1018.2 1033.8 1034.3 1034.3 DAY 22 12 2 18 2 3 3 30 27 23 25 12 MIN. QFF PRESSURE IN HPA 1005.4 1005.0 1000.6 1002.8 1002.6 991.9 990.4 997.5 998.7 1006.5 1011.0 1011.5 990.4 DAY 28 20 26 27 28 30 30 1 7 27 14 6 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 845.8 842.2 843.1 844.7 845.5 840.8 838.8 843.4 845.1 847.4 848.6 848.8 844.5 MAX. QFE PRESSURE IN HPA 851.4 848.4 852.2 848.9 851.2 844.2 843.8 846.2 851.1 852.0 856.9 856.9 856.9 DAY 11 6 2 7 1 3 3 30 26 15 25 11 MIN. QFE PRESSURE IN HPA 834.1 834.3 833.8 840.4 841.1 834.5 835.5 840.5 840.1 842.7 841.5 840.9 833.8 DAY 28 19 26 20 8 30 25 1 6 27 14 6 MEAN QNH PRESSURE IN HPA 1019.1 1014.8 1015.9 1017.8 1018.7 1013.2 1010.9 1016.2 1018.3 1020.9 1022.3 1022.5 1017.6 MAX. QNH PRESSURE IN HPA 1025.6 1022.1 1026.5 1022.7 1025.3 1017.2 1016.7 1019.5 1025.2 1026.3 1032.0 1032.0 1032.0 DAY 11 6 2 7 1 3 3 30 26 15 25 11 MIN. QNH PRESSURE IN HPA 1005.4 1005.7 1005.1 1012.8 1013.6 1005.9 1007.1 1012.9 1012.4 1015.5 1014.1 1013.4 1005.1 DAY 28 19 26 20 8 30 25 1 6 27 14 6 MEAN QFF PRESSURE IN HPA 1019.5 1015.0 1013.7 1011.3 1009.7 1000.0 994.7 1001.8 1006.5 1011.7 1019.8 1023.5 1010.6 MAX. QFF PRESSURE IN HPA 1025.7 1023.9 1030.1 1017.4 1020.3 1007.3 1001.6 1007.0 1016.3 1016.9 1032.1 1035.6 1035.6 DAY 22 12 2 18 1 7 3 30 26 23 25 11 MIN. QFF PRESSURE IN HPA 1007.0 1006.6 1002.1 1005.0 1004.1 991.4 990.8 997.9 998.6 1006.1 1010.5 1012.4 990.8 DAY 15 20 26 27 22 30 30 1 6 26 14 6 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 845.6 841.9 843.1 844.5 845.5 840.8 838.8 843.6 845.2 847.3 848.5 848.5 844.4 MAX. QFE PRESSURE IN HPA 851.4 848.4 852.4 848.8 851.2 844.5 843.6 846.2 851.4 851.8 856.8 856.7 856.8 DAY 11 6 2 7 1 2 3 3 26 14 25 11 MIN. QFE PRESSURE IN HPA 834.3 834.7 834.4 840.4 841.4 834.7 834.9 840.8 840.3 842.5 842.9 841.2 834.3 DAY 28 18 26 27 29 30 30 1 6 26 14 6 MEAN QNH PRESSURE IN HPA 1018.8 1014.6 1015.9 1017.6 1018.7 1013.3 1011.0 1016.5 1018.4 1020.8 1022.2 1022.1 1017.5 MAX. QNH PRESSURE IN HPA 1025.6 1022.1 1026.7 1022.5 1025.3 1017.5 1016.5 1019.5 1025.6 1026.0 1031.8 1031.7 1031.8 DAY 11 6 2 7 1 2 3 3 26 14 25 11 MIN. QNH PRESSURE IN HPA 1005.7 1006.1 1005.8 1012.8 1013.9 1006.1 1006.4 1013.2 1012.7 1015.2 1015.7 1013.7 1005.7 DAY 28 18 26 27 29 30 30 1 6 26 14 6 MEAN QFF PRESSURE IN HPA 1018.6 1014.2 1013.4 1010.8 1009.6 1000.0 994.7 1002.0 1006.5 1011.2 1019.1 1022.5 1010.2 MAX. QFF PRESSURE IN HPA 1025.5 1023.3 1030.1 1017.2 1020.2 1007.6 1001.1 1006.5 1016.3 1016.1 1031.4 1035.1 1035.1 DAY 22 28 2 1 1 6 3 30 26 14 25 11 MIN. QFF PRESSURE IN HPA 1007.5 1007.8 1002.2 1003.9 1003.6 991.8 990.0 998.2 999.2 1005.1 1009.8 1011.0 990.0 DAY 15 19 26 27 22 30 30 6 6 26 1 18 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1988-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.7 3.6 8.0 14.8 19.6 25.6 28.4 27.7 23.2 16.5 9.4 4.3 15.2 MINIMUN AIR TEMPERATURE (C) -1.7 -0.3 3.7 9.8 14.1 19.5 22.7 21.9 17.5 11.6 5.4 1.0 10.4 DAYS WITH MINIMUM TEMP. >=21 0.0 0.0 0.0 0.0 0.7 9.6 23.6 22.3 3.7 0.0 0.0 0.0 59.9 DAYS WITH MINIMUM TEMP. <=-4 7.7 4.2 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 2.6 15.5 DAYS WITH FREEZING MIN.<= 0 21.7 15.1 5.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 2.4 12.1 56.4 TEMPERATURE RECORDS LOWEST(C) -11.4 -11.0 -8.0 -1.6 3.0 12.0 15.6 13.5 8.8 2.6 -5.2 -9.6 -11.4 YEAR-DAY 89-31 89-15 92-12 97-12 92- 5 3- 7 88-28 92-31 89-23 95-27 88-15 88-29 89-31 MAXIMUM AIR TEMPERATURE (C) 6.0 8.0 12.6 19.8 25.0 31.1 33.9 33.4 29.2 22.3 14.3 8.5 20.3 DAYS WITH MAXIMUM TEMP. >=30 0.0 0.0 0.0 0.0 3.2 21.1 29.5 28.7 14.1 0.1 0.0 0.0 96.7 DAYS WITH MAXIMUM TEMP. <= 0 1.5 0.7 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.7 TEMPERATURE RECORDS HIGHEST(C) 16.4 17.6 23.8 28.6 33.6 37.8 39.8 39.0 35.6 31.2 22.0 19.0 39.8 YEAR-DAY 0- 1 99-28 1-31 94-24 99-31 89-30 3-17 2-10 0- 8 2- 3 90- 5 98-16 3-17 DIF. BETWEEN (MAX.-MIN.) (C) 7.7 8.3 8.9 10.0 10.9 11.6 11.2 11.5 11.7 10.7 8.9 7.5 9.9 MEAN DAILY TEMP. (MDT) (C) 2.2 3.9 8.1 14.8 19.5 25.3 28.3 27.7 23.4 16.9 9.9 4.7 15.4 STANDARD DEVIATION OF MDT(C) 2.08 2.15 2.08 1.54 1.70 0.90 1.07 1.10 1.40 1.52 1.55 1.85 1.58 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.9 24.7 131.6 225.6 206.8 83.7 3.7 0.0 0.0 677.0 HEATING DEG. DAYS(BASE 18 0C) 491.0 398.8 305.8 107.2 25.2 0.2 0.0 0.0 2.1 56.0 244.2 409.8 2040.3 DEWPOINT (MEAN C) -4.3 -4.4 -2.3 1.4 4.0 5.5 8.6 8.0 4.8 3.0 0.2 -2.1 1.9 MIXING RATIO (G/KG) 3.42 3.42 4.03 5.23 6.23 6.92 8.52 8.20 6.60 5.76 4.77 4.03 5.59 VAPOUR PRESSURE (HPA) 4.62 4.61 5.42 7.03 8.37 9.25 11.36 10.97 8.87 7.77 6.45 5.45 7.51 SATURATION DEF. (HPA) 2.58 3.65 5.78 10.50 15.45 24.50 28.20 27.07 20.55 11.72 5.79 3.17 13.25 RELATIVE HUMIDITY (MEAN %) 67 60 53 44 39 30 31 31 33 44 56 66 45 RELATIVE HUMIDITY (MAX. %) 82 77 71 62 56 43 43 43 45 58 72 81 61 RELATIVE HUMIDITY (MIN. %) 49 42 37 30 26 20 21 21 22 29 40 49 32 RELATIVE HUMIDITY (MEAN% 03UTC) 75 69 63 55 51 41 41 40 42 54 66 73 56 RELATIVE HUMIDITY (MEAN% 09UTC) 55 50 44 36 31 24 25 24 25 33 44 54 37 RELATIVE HUMIDITY (MEAN% 15UTC) 66 57 47 38 33 24 25 27 31 43 56 66 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 60.7 66.3 81.2 50.0 27.0 4.5 3.0 3.0 3.8 18.0 38.9 66.2 422.6 DAYS WITH PRECIPITATION >=10 2.2 2.3 3.2 1.5 0.9 0.0 0.1 0.1 0.2 0.5 1.4 2.1 14.5 DAYS WITH PRECIPITATION >= 5 4.2 4.2 5.1 2.7 1.7 0.3 0.2 0.3 0.3 0.9 2.6 4.1 26.6 DAYS WITH PRECIPITATION >= 1 7.2 7.1 9.1 6.4 4.8 1.4 0.6 0.4 0.4 3.1 4.6 7.5 52.6 DAYS WITH PRECIPITATION 12.0 10.9 12.7 10.1 8.7 3.4 3.1 1.2 1.4 6.2 8.1 10.7 88.5 GREATEST DAILY PRECIPITATION 35.0 54.0 50.0 45.0 22.0 9.0 12.0 13.0 19.0 32.0 27.0 49.0 54.0 YEAR-DAY 99- 9 94- 1 96- 2 2- 3 96- 8 1-12 88-19 92-29 1-19 88-16 94-25 88-17 94 DAY WITH THUNDER STORM 0.3 0.6 1.7 3.3 3.6 2.2 1.6 0.7 0.8 1.6 0.9 0.8 18.1 DAYS WITH SNOW OR SLEET 8.9 6.6 2.6 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.7 4.7 23.7 DAYS WITH DUST 0.3 0.1 0.3 0.3 0.9 0.1 0.1 0.1 0.2 0.0 0.1 0.3 2.8 WIND DIRECTION (PREVAILING) 180 180 180 225 225 225 225 225 225 225 180 180 225 PREVAILING WIND SPEED(KNOTS) 5.1 5.9 5.8 7.1 7.0 6.2 5.8 5.8 6.0 6.5 5.5 5.1 6.3 PREVAILING WIND PERCENT 4.2 6.0 6.4 8.2 10.3 9.2 7.8 8.1 8.3 7.7 4.9 4.2 6.7 CALMS PERCENT OF WIND 80.0 72.5 67.2 61.2 59.2 62.1 68.5 68.6 66.0 67.2 76.9 82.4 69.3 NO. OF WIND OBSERVATION 247.9 226.0 248.0 240.0 248.0 240.0 247.9 247.9 240.0 248.0 239.7 247.9 2921.3 VECTOR WIND DIRECTION (MEAN) 184 224 243 243 244 239 231 232 227 237 231 235 236 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.2 0.5 0.8 1.1 0.8 0.6 0.5 0.6 0.4 0.2 0.1 0.5 WIND STEADINESES (MEAN %) 10.0 12.5 25.0 32.0 42.3 34.8 35.3 29.4 33.3 22.2 15.4 11.1 27.8 WIND SPEED (MEAN KNOTS) 1.0 1.6 2.0 2.5 2.6 2.3 1.7 1.7 1.8 1.8 1.3 0.9 1.8 FASTEST WIND DIRECTION 280 360 210 260 240 360 10 350 300 360 360 27 260 FASTEST WIND SPEED (KNOTS) 17 27 29 47 29 27 29 19 23 17 21 19 47 YEAR-DAY 97-28 1-15 95-26 90-13 90-12 91-18 96-12 98- 3 95-15 90- 8 3-14 89- 5 90 DAYS WITH SKY CLEAR (0-2)/8 12.2 11.4 10.5 10.0 15.9 24.7 23.8 27.2 27.0 19.9 14.0 11.4 208.0 DAYS WITH P.CLOUDY (3-6)/8 9.5 8.6 11.7 12.4 11.7 4.8 7.0 3.7 2.7 8.6 9.7 10.1 100.5 DAYS WITH CLOUDY (7-8)/8 9.3 8.2 8.8 7.6 3.4 0.5 0.2 0.1 0.3 2.5 6.2 9.5 56.6 DAYS WITH VISIBILITY =< 2 KM 5.7 3.9 1.4 0.3 0.4 0.1 0.0 0.0 0.2 0.3 0.8 4.7 17.8 DURATION OF SUNSHINE HOURS 136.7 152.8 186.3 219.7 283.1 329.1 338.3 338.9 302.5 244.3 170.0 133.5 2835.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1988-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 845.2 843.8 843.1 843.7 844.0 841.6 841.0 842.8 845.2 848.1 848.0 846.9 844.4 MAX. QFE PRESSURE IN HPA 857.0 856.1 856.1 855.2 853.0 850.4 849.9 851.0 855.9 856.9 859.3 857.1 859.3 YEAR-DAY 99- 2 98-23 2-11 94- 5 98- 8 93-23 0-30 96-30 94-23 93-17 96-18 3-12 96-18 MIN. QFE PRESSURE IN HPA 830.4 829.4 830.6 832.2 833.2 833.2 833.6 835.3 836.7 840.0 833.4 830.0 829.4 YEAR-DAY 98-13 1-21 97-29 2- 4 90-13 99-25 98- 8 89- 1 0- 1 96-27 94-26 88-27 1-21 MEAN QNH PRESSURE IN HPA 1018.4 1016.8 1015.9 1016.6 1016.9 1014.2 1013.4 1015.6 1018.3 1021.8 1021.6 1020.4 1017.5 MAX. QNH PRESSURE IN HPA 1032.1 1031.0 1031.0 1030.0 1027.4 1024.4 1023.8 1025.1 1030.8 1032.0 1034.8 1032.2 1034.8 YEAR-DAY 99- 2 98-23 2-11 94- 5 98- 8 93-23 0-30 96-30 94-23 93-17 96-18 3-12 96-18 MIN. QNH PRESSURE IN HPA 1001.1 1000.0 1001.4 1003.2 1004.4 1004.4 1004.9 1006.8 1008.5 1012.3 1004.6 1000.7 1000.0 YEAR-DAY 98-13 1-21 97-29 2- 4 90-13 99-25 98- 8 89- 1 0- 1 96-27 94-26 88-27 1-21 MEAN QFF PRESSURE IN HPA 1020.4 1017.5 1013.7 1009.9 1007.2 1000.9 998.3 1000.9 1006.5 1014.1 1018.5 1020.7 1010.7 MAX. QFF PRESSURE IN HPA 1036.0 1036.8 1032.4 1028.8 1023.5 1013.7 1009.7 1015.9 1023.1 1027.9 1035.7 1037.3 1037.3 YEAR-DAY 99- 2 91-15 92-12 94- 5 92- 2 93-23 2-30 92-31 94-23 90-19 96-18 3-12 3-12 MIN. QFF PRESSURE IN HPA 1002.9 996.9 995.4 997.3 993.4 989.3 987.1 990.3 994.1 1002.1 1001.8 1000.3 987.1 YEAR-DAY 98-13 1-21 3-26 90-15 99-20 99-25 95-16 94- 2 0- 1 98- 1 94-26 88-27 95-16 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 845.0 843.5 842.7 843.4 843.7 841.5 840.7 842.6 845.0 847.9 847.7 846.7 844.2 MAX. QFE PRESSURE IN HPA 853.9 855.2 855.2 852.6 851.2 849.7 848.9 849.6 854.1 855.4 858.9 856.4 858.9 YEAR-DAY 88- 3 98-23 2-11 94- 6 3- 2 93-23 0-31 96-30 94-23 95-26 96-19 99- 6 96-19 MIN. QFE PRESSURE IN HPA 831.8 831.5 831.4 832.4 833.2 834.0 834.4 836.1 837.5 840.9 833.4 831.8 831.4 YEAR-DAY 98-13 90-16 89-30 2- 4 90-13 99-25 98- 8 94- 2 0- 2 96-27 94-26 88-27 89-30 MEAN QNH PRESSURE IN HPA 1018.1 1016.4 1015.5 1016.3 1016.6 1014.1 1013.2 1015.3 1018.1 1021.5 1021.3 1020.1 1017.2 MAX. QNH PRESSURE IN HPA 1028.5 1030.0 1030.0 1027.0 1025.3 1023.6 1022.7 1023.5 1028.7 1030.2 1034.3 1031.4 1034.3 YEAR-DAY 88- 3 98-23 2-11 94- 6 3- 2 93-23 0-31 96-30 94-23 95-26 96-19 99- 6 96-19 MIN. QNH PRESSURE IN HPA 1002.8 1002.4 1002.3 1003.5 1004.4 1005.3 1005.8 1007.8 1009.4 1013.4 1004.6 1002.8 1002.3 YEAR-DAY 98-13 90-16 89-30 2- 4 90-13 99-25 98- 8 94- 2 0- 2 96-27 94-26 88-27 89-30 MEAN QFF PRESSURE IN HPA 1019.9 1016.9 1013.1 1009.5 1006.9 1000.7 997.9 1000.5 1005.8 1013.4 1017.8 1020.1 1010.2 MAX. QFF PRESSURE IN HPA 1033.6 1034.7 1031.6 1025.9 1021.5 1011.4 1008.4 1012.4 1020.4 1027.1 1034.8 1035.1 1035.1 YEAR-DAY 92-10 91-15 92-12 94- 6 92- 3 95- 1 0-31 92-31 94-23 95-26 96-19 3-12 3-12 MIN. QFF PRESSURE IN HPA 1003.9 1002.4 997.9 998.6 995.0 990.8 987.6 991.1 995.2 1002.4 1001.8 1001.7 987.6 YEAR-DAY 98-13 92-25 1-25 92-18 1-30 0-25 95-17 94- 2 0- 2 98- 2 94-26 94- 4 95-17 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 845.1 843.7 843.1 843.8 844.3 842.3 841.6 843.4 845.6 848.3 848.0 846.9 844.7 MAX. QFE PRESSURE IN HPA 855.1 855.2 855.4 853.4 852.0 850.4 849.4 849.9 855.5 855.8 858.6 855.8 858.6 YEAR-DAY 99- 2 98-23 2-11 94- 5 3- 2 93-23 96- 4 92-31 94-23 95-27 96-19 3-12 96-19 MIN. QFE PRESSURE IN HPA 830.5 831.9 831.8 832.2 834.3 834.4 834.7 836.6 838.6 840.9 834.2 830.6 830.5 YEAR-DAY 98-13 90-16 89-30 2- 4 90-13 91-12 98- 8 94- 2 96-22 96-27 94-26 88-27 98-13 MEAN QNH PRESSURE IN HPA 1018.2 1016.6 1015.9 1016.8 1017.3 1014.9 1014.1 1016.3 1018.8 1022.0 1021.7 1020.3 1017.7 MAX. QNH PRESSURE IN HPA 1029.9 1030.0 1030.2 1027.9 1026.3 1024.4 1023.2 1023.8 1030.3 1030.7 1033.9 1030.7 1033.9 YEAR-DAY 99- 2 98-23 2-11 94- 5 3- 2 93-23 96- 4 92-31 94-23 95-27 96-19 3-12 96-19 MIN. QNH PRESSURE IN HPA 1001.3 1002.9 1002.8 1003.2 1005.7 1005.8 1006.1 1008.4 1010.7 1013.4 1005.6 1001.4 1001.3 YEAR-DAY 98-13 90-16 89-30 2- 4 90-13 91-12 98- 8 94- 2 96-22 96-27 94-26 88-27 98-13 MEAN QFF PRESSURE IN HPA 1021.0 1018.1 1014.3 1010.7 1008.0 1001.8 999.2 1002.1 1007.7 1015.3 1019.5 1021.4 1011.6 MAX. QFF PRESSURE IN HPA 1035.6 1036.8 1031.4 1026.3 1021.5 1013.5 1009.3 1015.0 1023.1 1027.9 1035.4 1036.2 1036.8 YEAR-DAY 92-10 91-15 92-12 94- 5 3- 2 95- 1 0-31 92-31 94-23 90-19 96-19 90-28 91-15 MIN. QFF PRESSURE IN HPA 1003.8 1002.9 997.4 1000.1 995.2 991.8 989.1 991.7 997.5 1004.6 1003.9 1001.7 989.1 YEAR-DAY 98-13 1-21 1-25 92-18 1-30 91-12 95-17 94- 2 99-16 98- 1 94-26 88-27 95-17 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1988-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 846.1 844.7 844.1 844.7 845.0 842.9 842.2 844.1 846.4 849.3 849.0 847.8 845.5 MAX. QFE PRESSURE IN HPA 857.0 856.1 856.1 855.0 853.0 850.4 849.9 851.0 855.9 856.9 859.2 857.1 859.2 YEAR-DAY 99- 2 98-23 2-11 94- 5 98- 8 98- 6 0-30 96-30 94-23 93-17 96-18 3-12 96-18 MIN. QFE PRESSURE IN HPA 830.4 832.8 832.7 833.0 834.5 834.6 835.5 837.6 838.8 842.2 835.5 830.0 830.0 YEAR-DAY 98-13 3-19 89-30 2- 4 90-13 99-25 98- 8 2-17 0- 1 96-27 94-26 88-27 88-27 MEAN QNH PRESSURE IN HPA 1019.4 1017.8 1017.0 1017.8 1018.1 1015.6 1014.8 1017.1 1019.8 1023.1 1022.7 1021.4 1018.7 MAX. QNH PRESSURE IN HPA 1032.1 1031.0 1031.0 1029.8 1027.4 1024.4 1023.8 1025.1 1030.8 1032.0 1034.6 1032.2 1034.6 YEAR-DAY 99- 2 98-23 2-11 94- 5 98- 8 98- 6 0-30 96-30 94-23 93-17 96-18 3-12 96-18 MIN. QNH PRESSURE IN HPA 1001.1 1003.9 1003.8 1004.2 1005.9 1006.0 1007.1 1009.5 1010.9 1014.9 1007.1 1000.7 1000.7 YEAR-DAY 98-13 3-19 89-30 2- 4 90-13 99-25 98- 8 2-17 0- 1 96-27 94-26 88-27 88-27 MEAN QFF PRESSURE IN HPA 1021.6 1018.6 1014.8 1011.1 1008.3 1002.3 999.8 1002.4 1007.8 1015.3 1019.6 1021.8 1011.9 MAX. QFF PRESSURE IN HPA 1036.0 1036.5 1032.4 1028.8 1022.2 1013.7 1009.7 1015.9 1022.5 1027.6 1034.8 1037.3 1037.3 YEAR-DAY 99- 2 91-15 92-12 94- 5 3- 2 93-23 2-30 92-31 94-23 90-19 96-19 3-12 3-12 MIN. QFF PRESSURE IN HPA 1002.9 1002.0 1000.6 1000.5 995.8 991.2 990.5 993.5 996.7 1004.6 1004.8 1000.3 990.5 YEAR-DAY 98-13 1-21 92-31 90-16 90-12 99-25 95-16 94- 2 0- 1 89- 2 94-26 88-27 95-16 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 845.4 844.2 843.5 844.1 844.5 842.3 841.6 843.5 845.7 848.4 848.1 847.0 844.9 MAX. QFE PRESSURE IN HPA 856.2 855.5 855.0 855.2 852.0 849.8 849.6 849.8 855.3 856.1 858.5 856.0 858.5 YEAR-DAY 99- 2 91-15 2-11 94- 5 98- 8 98- 6 96- 3 92-31 94-23 93-17 96-18 99- 6 96-18 MIN. QFE PRESSURE IN HPA 830.4 832.4 833.4 832.4 833.9 833.9 835.2 837.0 838.3 841.9 836.4 830.7 830.4 YEAR-DAY 98-13 1-21 97-25 2- 4 90-13 99-25 98- 5 89- 1 0- 1 96-27 94-26 88-27 98-13 MEAN QNH PRESSURE IN HPA 1018.6 1017.2 1016.4 1017.1 1017.5 1015.0 1014.2 1016.4 1019.0 1022.1 1021.8 1020.4 1018.0 MAX. QNH PRESSURE IN HPA 1031.2 1030.3 1029.8 1030.0 1026.3 1023.7 1023.5 1023.7 1030.1 1031.0 1033.8 1030.9 1033.8 YEAR-DAY 99- 2 91-15 2-11 94- 5 98- 8 98- 6 96- 3 92-31 94-23 93-17 96-18 99- 6 96-18 MIN. QNH PRESSURE IN HPA 1001.1 1003.5 1004.6 1003.5 1005.2 1005.2 1006.7 1008.8 1010.3 1014.5 1008.1 1001.5 1001.1 YEAR-DAY 98-13 1-21 97-25 2- 4 90-13 99-25 98- 5 89- 1 0- 1 96-27 94-26 88-27 98-13 MEAN QFF PRESSURE IN HPA 1020.2 1017.7 1014.0 1010.2 1007.6 1001.5 999.0 1001.5 1006.8 1014.0 1018.2 1020.3 1010.9 MAX. QFF PRESSURE IN HPA 1034.8 1035.1 1031.3 1028.8 1022.1 1012.3 1008.9 1014.6 1021.4 1026.3 1033.6 1036.1 1036.1 YEAR-DAY 99- 2 91-15 92-12 94- 5 92- 2 93-23 0-30 92-31 94-23 95-25 96-18 3-12 3-12 MIN. QFF PRESSURE IN HPA 1004.5 999.9 999.2 999.0 993.5 990.2 989.2 992.2 995.8 1003.6 1004.4 1003.0 989.2 YEAR-DAY 98-13 1-21 1-25 90-16 90-12 99-25 95-16 94- 2 0- 1 98- 1 1-18 88-27 95-16 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 844.5 843.1 842.4 843.0 843.4 841.1 840.4 842.2 844.5 847.3 847.3 846.2 843.8 MAX. QFE PRESSURE IN HPA 854.8 854.6 853.2 853.2 851.0 848.3 848.6 848.9 854.1 855.3 858.0 854.8 858.0 YEAR-DAY 99- 2 91-15 2-11 94- 5 98- 8 98- 6 96- 3 92-31 94-23 95-25 96-18 98-29 96-18 MIN. QFE PRESSURE IN HPA 830.6 829.4 830.8 832.2 834.3 833.2 834.2 836.0 836.8 840.0 836.4 831.3 829.4 YEAR-DAY 98-13 1-21 3-26 2- 4 90-13 99-25 95-16 89- 1 0- 1 96-27 1-18 88-27 1-21 MEAN QNH PRESSURE IN HPA 1017.5 1016.0 1015.1 1015.8 1016.2 1013.6 1012.7 1014.8 1017.5 1020.8 1020.8 1019.5 1016.7 MAX. QNH PRESSURE IN HPA 1029.5 1029.3 1027.7 1027.7 1025.1 1022.0 1022.3 1022.7 1028.7 1030.1 1033.2 1029.5 1033.2 YEAR-DAY 99- 2 91-15 2-11 94- 5 98- 8 98- 6 96- 3 92-31 94-23 95-25 96-18 98-29 96-18 MIN. QNH PRESSURE IN HPA 1001.4 1000.0 1001.6 1003.2 1005.7 1004.4 1005.6 1007.7 1008.6 1012.3 1008.1 1002.2 1000.0 YEAR-DAY 98-13 1-21 3-26 2- 4 90-13 99-25 95-16 89- 1 0- 1 96-27 1-18 88-27 1-21 MEAN QFF PRESSURE IN HPA 1019.3 1016.4 1012.6 1009.0 1006.5 1000.2 997.5 999.9 1005.2 1012.8 1017.4 1019.5 1009.7 MAX. QFF PRESSURE IN HPA 1033.5 1034.5 1030.9 1026.0 1022.2 1010.9 1007.5 1013.2 1020.4 1025.1 1033.1 1034.1 1034.5 YEAR-DAY 99- 2 91-15 92-12 94- 5 92- 2 95- 1 0-30 92-31 94-23 95-25 96-18 3-12 91-15 MIN. QFF PRESSURE IN HPA 1003.8 996.9 995.4 998.1 993.8 989.3 987.1 991.7 994.1 1002.5 1004.6 1003.1 987.1 YEAR-DAY 97-17 1-21 3-26 90-15 99-20 99-25 95-16 94- 3 0- 1 98- 1 95-11 88-26 95-16 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1988-2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 845.0 843.5 842.5 842.9 843.1 840.6 839.8 841.7 844.2 847.5 847.7 846.8 843.8 MAX. QFE PRESSURE IN HPA 854.6 854.8 852.9 853.0 850.5 848.1 847.8 848.5 853.9 855.4 859.0 855.3 859.0 YEAR-DAY 99- 2 91-15 2-11 94- 5 3- 2 98- 6 96- 3 92-31 94-23 95-25 96-18 3-11 96-18 MIN. QFE PRESSURE IN HPA 831.6 830.7 830.6 832.4 834.2 833.2 833.6 835.3 836.7 840.2 835.5 832.7 830.6 YEAR-DAY 98-13 1-21 97-29 2- 4 99-20 99-25 98- 8 89- 1 0- 1 96-27 1-18 88-26 97-29 MEAN QNH PRESSURE IN HPA 1018.1 1016.3 1015.2 1015.7 1015.9 1013.0 1012.1 1014.3 1017.2 1021.1 1021.3 1020.2 1016.7 MAX. QNH PRESSURE IN HPA 1029.3 1029.5 1027.3 1027.4 1024.5 1021.7 1021.4 1022.2 1028.5 1030.2 1034.4 1030.1 1034.4 YEAR-DAY 99- 2 91-15 2-11 94- 5 3- 2 98- 6 96- 3 92-31 94-23 95-25 96-18 3-11 96-18 MIN. QNH PRESSURE IN HPA 1002.5 1001.5 1001.4 1003.5 1005.6 1004.4 1004.9 1006.8 1008.5 1012.5 1007.1 1003.8 1001.4 YEAR-DAY 98-13 1-21 97-29 2- 4 99-20 99-25 98- 8 89- 1 0- 1 96-27 1-18 88-26 97-29 MEAN QFF PRESSURE IN HPA 1020.9 1017.7 1013.5 1009.5 1006.6 999.8 997.2 1000.0 1006.1 1014.4 1019.2 1021.2 1010.5 MAX. QFF PRESSURE IN HPA 1034.9 1036.4 1032.0 1026.9 1022.4 1010.4 1007.3 1013.5 1021.1 1026.9 1035.7 1036.3 1036.4 YEAR-DAY 92- 9 91-15 92-12 94- 5 92- 2 93-22 0-30 92-31 94-22 95-26 96-18 90-28 91-15 MIN. QFF PRESSURE IN HPA 1005.4 999.7 998.9 997.3 993.4 989.8 987.1 990.3 994.7 1003.4 1004.6 1003.7 987.1 YEAR-DAY 3-28 1-21 97-29 90-15 99-20 99-25 95-16 94- 2 0- 1 95-12 1-18 94- 3 95-16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 845.5 844.0 843.2 843.8 843.9 841.2 840.7 842.6 845.1 848.2 848.2 847.2 844.5 MAX. QFE PRESSURE IN HPA 855.6 855.2 853.6 853.6 851.2 848.6 848.7 849.2 854.5 855.6 859.3 856.9 859.3 YEAR-DAY 99- 2 98-22 2-10 94- 5 3- 1 93-22 0-30 96-30 94-22 95-25 96-18 3-11 96-18 MIN. QFE PRESSURE IN HPA 834.1 831.2 832.4 833.0 834.7 834.1 834.4 835.8 837.6 840.8 835.4 833.3 831.2 YEAR-DAY 3-28 1-21 89-29 2- 3 91-22 94- 4 95-16 89- 1 0- 1 96-27 1-18 88-26 1-21 MEAN QNH PRESSURE IN HPA 1018.7 1017.0 1016.0 1016.7 1016.9 1013.8 1013.1 1015.3 1018.2 1021.9 1021.9 1020.7 1017.5 MAX. QNH PRESSURE IN HPA 1030.5 1030.0 1028.1 1028.1 1025.3 1022.3 1022.4 1023.0 1029.2 1030.5 1034.8 1032.0 1034.8 YEAR-DAY 99- 2 98-22 2-10 94- 5 3- 1 93-22 0-30 96-30 94-22 95-25 96-18 3-11 96-18 MIN. QNH PRESSURE IN HPA 1005.4 1002.1 1003.5 1004.2 1006.1 1005.4 1005.8 1007.4 1009.5 1013.2 1007.0 1004.5 1002.1 YEAR-DAY 3-28 1-21 89-29 2- 3 91-22 94- 4 95-16 89- 1 0- 1 96-27 1-18 88-26 1-21 MEAN QFF PRESSURE IN HPA 1020.8 1017.8 1013.7 1009.9 1007.0 1000.3 998.0 1000.6 1006.2 1014.0 1018.7 1021.0 1010.7 MAX. QFF PRESSURE IN HPA 1035.1 1034.8 1032.0 1027.9 1023.5 1011.4 1008.0 1013.5 1021.0 1027.4 1035.0 1035.6 1035.6 YEAR-DAY 92- 9 91-15 92-12 94- 5 92- 2 93-22 0-30 92-31 94-22 95-25 96-18 3-11 3-11 MIN. QFF PRESSURE IN HPA 1007.0 1000.6 999.9 997.9 994.8 990.6 987.8 991.4 995.8 1002.1 1003.6 1003.0 987.8 YEAR-DAY 3-15 1-21 98-18 90-15 1-29 99-25 95-16 94- 1 0- 1 98- 1 1-18 94- 3 95-16 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 845.3 843.9 843.1 843.7 843.9 841.4 840.8 842.7 845.1 848.2 848.1 847.0 844.4 MAX. QFE PRESSURE IN HPA 854.9 855.2 854.6 853.2 851.2 849.1 848.9 849.8 854.7 855.7 859.3 856.7 859.3 YEAR-DAY 99- 2 98-22 2-10 94- 5 3- 1 93-22 0-30 92-31 94-22 90-15 96-18 3-11 96-18 MIN. QFE PRESSURE IN HPA 833.9 831.8 831.6 832.8 834.2 834.2 834.6 836.6 837.6 841.1 835.4 832.4 831.6 YEAR-DAY 98-12 1-21 92-30 2- 3 91-22 2-20 95-16 89- 1 0- 1 90-31 94-25 94- 3 92-30 MEAN QNH PRESSURE IN HPA 1018.5 1016.8 1016.0 1016.6 1016.9 1013.9 1013.3 1015.4 1018.3 1021.8 1021.7 1020.4 1017.5 MAX. QNH PRESSURE IN HPA 1029.6 1030.0 1029.3 1027.7 1025.3 1022.9 1022.7 1023.7 1029.4 1030.6 1034.8 1031.7 1034.8 YEAR-DAY 99- 2 98-22 2-10 94- 5 3- 1 93-22 0-30 92-31 94-22 90-15 96-18 3-11 96-18 MIN. QNH PRESSURE IN HPA 1005.2 1002.8 1002.5 1003.9 1005.6 1005.6 1006.0 1008.4 1009.5 1013.6 1007.0 1003.5 1002.5 YEAR-DAY 98-12 1-21 92-30 2- 3 91-22 2-20 95-16 89- 1 0- 1 90-31 94-25 94- 3 92-30 MEAN QFF PRESSURE IN HPA 1020.1 1017.2 1013.4 1009.7 1006.9 1000.4 998.0 1000.6 1006.1 1013.7 1018.2 1020.3 1010.4 MAX. QFF PRESSURE IN HPA 1033.9 1034.3 1030.7 1027.1 1022.0 1011.5 1008.7 1013.8 1020.9 1027.1 1034.6 1035.1 1035.1 YEAR-DAY 99- 2 88- 6 92-11 94- 5 92- 2 93-22 0-30 92-31 94-22 95-25 96-18 3-11 3-11 MIN. QFF PRESSURE IN HPA 1005.1 1001.5 998.2 997.7 995.0 990.0 987.9 991.5 995.7 1002.5 1003.8 1000.4 987.9 YEAR-DAY 97-15 1-21 92-30 90-15 1-29 99-25 95-16 94- 1 0- 1 98- 1 94-25 94- 3 95-16 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 1 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 1.1 2.7 8.1 13.6 20.5 25.2 27.8 26.4 22.5 16.4 9.4 4.3 14.8 1989 -2.1 -1.1 7.8 16.0 19.5 26.7 28.8 27.5 22.6 17.6 9.8 4.8 14.8 1990 -0.3 2.1 7.9 13.7 21.7 27.0 28.1 28.3 25.6 16.0 11.2 4.0 15.4 1991 1.5 1.5 6.9 15.2 18.3 24.6 28.1 27.4 22.9 16.2 9.8 2.8 14.6 1992 -1.1 1.5 3.6 12.6 15.3 23.8 29.3 25.1 20.8 15.6 10.2 3.6 13.4 1993 -0.3 3.3 6.6 14.5 18.5 25.3 27.6 27.0 24.3 14.5 6.7 5.2 14.4 1994 4.1 3.6 10.0 15.5 19.2 25.4 28.9 28.8 20.6 14.7 10.1 1.6 15.2 1995 4.5 5.5 9.5 14.3 18.7 24.1 29.9 29.3 22.5 15.1 10.4 1.7 15.5 1996 0.4 4.5 5.2 12.9 19.9 25.3 27.0 27.2 24.2 15.3 8.3 5.9 14.7 1997 4.1 3.4 5.9 14.1 19.5 25.6 29.8 28.9 22.6 17.7 8.3 3.9 15.3 1998 0.5 2.7 8.0 15.8 19.2 26.4 28.2 27.4 23.1 16.6 12.6 8.5 15.8 1999 3.0 7.3 8.4 15.0 21.5 26.8 26.6 28.1 23.2 17.4 7.8 5.4 15.9 2000 2.7 4.3 8.5 17.9 22.9 26.2 27.9 27.8 24.4 15.0 7.3 4.6 15.8 2001 2.4 5.4 11.8 17.7 21.5 26.3 27.8 27.8 23.2 17.2 9.4 6.5 16.4 2002 3.0 6.8 11.1 12.9 19.6 25.3 27.9 28.7 25.3 19.8 9.7 2.1 16.0 2003 4.4 4.6 7.9 14.4 18.2 25.0 30.0 26.9 22.6 18.7 8.6 3.8 15.4 MEAN 1.7 3.6 8.0 14.8 19.6 25.6 28.4 27.7 23.2 16.5 9.4 4.3 15.2 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 2 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 -2.6 -1.3 3.2 8.3 14.3 18.9 21.9 20.9 16.9 11.6 5.3 0.6 9.8 1989 -5.9 -5.6 3.9 10.5 14.1 20.3 22.9 21.7 17.1 12.8 5.5 1.6 9.9 1990 -3.1 -1.3 3.5 8.4 15.8 21.1 23.1 23.2 20.8 11.2 6.8 0.6 10.8 1991 -1.7 -2.2 3.5 10.0 12.7 18.8 22.7 21.9 17.5 12.0 5.8 -0.1 10.1 1992 -4.0 -2.0 0.1 8.1 11.0 18.4 24.1 19.9 15.3 10.6 6.1 0.6 9.0 1993 -3.9 0.2 2.8 9.8 13.4 19.2 21.9 21.3 18.7 9.7 3.8 1.7 9.9 1994 0.7 -0.2 5.8 10.7 13.6 19.6 23.1 23.2 15.4 10.8 6.5 -1.9 10.6 1995 0.6 1.9 4.8 9.6 13.7 18.4 24.1 23.5 17.0 9.9 5.7 -1.6 10.6 1996 -2.8 1.5 1.9 8.4 14.4 19.9 21.6 21.0 18.5 10.2 4.2 2.1 10.1 1997 0.4 -1.3 1.6 9.1 13.9 20.0 24.2 23.0 17.0 12.3 5.1 0.8 10.5 1998 -2.8 -1.2 3.7 10.7 13.9 20.6 22.7 21.9 17.4 11.5 7.8 4.4 10.9 1999 -0.2 3.2 4.0 9.8 15.5 20.2 20.7 22.1 17.4 12.3 4.0 1.7 10.9 2000 -0.8 -0.0 3.8 12.6 16.6 19.7 21.7 21.8 18.9 10.5 3.9 1.6 10.9 2001 -1.0 1.0 7.1 12.1 15.8 19.9 22.1 21.4 17.4 12.2 5.4 3.2 11.4 2002 -0.2 2.1 5.8 8.7 13.7 18.7 21.8 22.8 18.8 14.3 5.9 -0.4 11.0 2003 0.9 1.2 3.9 10.3 12.3 18.9 24.0 20.8 16.6 13.3 4.4 0.9 10.6 MEAN -1.7 -0.3 3.7 9.8 14.1 19.5 22.7 21.9 17.5 11.6 5.4 1.0 10.4 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 3 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF MAXIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 5.7 7.2 13.0 18.6 25.7 30.5 33.4 31.9 28.7 22.4 15.0 9.3 20.1 1989 2.7 3.9 12.5 21.1 24.9 32.4 34.4 33.3 28.8 23.4 15.0 9.2 20.1 1990 3.5 5.9 12.6 18.9 26.9 32.5 33.2 33.7 31.2 21.5 16.9 8.6 20.5 1991 5.2 5.8 11.0 20.3 23.6 30.2 33.5 33.1 28.7 21.3 14.8 7.0 19.5 1992 3.0 5.8 7.7 17.7 19.7 28.9 34.3 30.5 26.8 21.7 15.8 7.1 18.2 1993 3.8 6.5 10.7 19.3 23.4 30.6 32.9 32.3 30.3 20.1 10.4 9.3 19.1 1994 8.1 8.0 14.7 20.8 24.6 30.8 34.7 34.5 26.2 19.8 14.5 5.8 20.2 1995 9.4 9.9 14.5 19.2 23.7 29.6 35.8 35.4 28.6 20.9 16.1 5.8 20.8 1996 4.4 8.4 9.0 17.7 25.3 30.8 32.2 32.7 30.3 21.1 13.5 10.9 19.7 1997 8.5 8.5 10.1 19.0 25.0 31.2 35.7 34.7 28.3 23.6 12.3 7.9 20.4 1998 4.5 6.8 12.5 21.3 24.8 31.8 33.8 33.0 29.1 22.9 18.4 13.7 21.1 1999 7.1 12.0 13.0 20.1 27.1 32.5 32.2 33.8 29.3 23.4 12.2 9.8 21.0 2000 7.1 8.9 13.5 23.2 28.6 32.0 33.6 33.9 30.4 20.2 11.5 8.1 20.9 2001 6.6 10.3 16.7 23.5 27.1 32.2 33.3 33.9 29.3 23.0 14.6 10.7 21.8 2002 7.3 11.9 16.9 17.4 25.4 31.1 33.7 35.0 32.0 26.2 14.7 5.6 21.4 2003 8.9 8.7 12.5 18.8 23.9 30.7 35.9 33.1 29.0 25.0 13.8 7.5 20.7 MEAN 6.0 8.0 12.6 19.8 25.0 31.1 33.9 33.4 29.2 22.3 14.3 8.5 20.3 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 4 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 8.3 8.5 9.8 10.3 11.4 11.6 11.5 11.0 11.8 10.8 9.7 8.7 10.3 1989 8.6 9.5 8.6 10.6 10.8 12.1 11.5 11.6 11.7 10.6 9.5 7.6 10.2 1990 6.6 7.2 9.1 10.5 11.1 11.4 10.1 10.5 10.4 10.3 10.1 8.0 9.7 1991 6.9 8.0 7.5 10.3 10.9 11.4 10.8 11.2 11.2 9.3 9.0 7.1 9.4 1992 7.0 7.8 7.6 9.6 8.7 10.5 10.2 10.6 11.5 11.1 9.7 6.5 9.2 1993 7.7 6.3 7.9 9.5 10.0 11.4 11.0 11.0 11.6 10.4 6.6 7.6 9.2 1994 7.4 8.2 8.9 10.1 11.0 11.2 11.6 11.3 10.8 9.0 8.0 7.7 9.6 1995 8.8 8.0 9.7 9.6 10.0 11.2 11.7 11.9 11.6 11.0 10.4 7.4 10.2 1996 7.2 6.9 7.1 9.3 10.9 10.9 10.6 11.7 11.8 10.9 9.3 8.8 9.6 1997 8.1 9.8 8.5 9.9 11.1 11.2 11.5 11.7 11.3 11.3 7.2 7.1 9.9 1998 7.3 8.0 8.8 10.6 10.9 11.2 11.1 11.1 11.7 11.4 10.6 9.3 10.2 1999 7.3 8.8 9.0 10.3 11.6 12.3 11.5 11.7 11.9 11.1 8.2 8.1 10.1 2000 7.9 8.9 9.7 10.6 12.0 12.3 11.9 12.1 11.5 9.7 7.6 6.5 10.0 2001 7.6 9.3 9.6 11.4 11.3 12.3 11.2 12.5 11.9 10.8 9.2 7.5 10.4 2002 7.5 9.8 11.1 8.7 11.7 12.4 11.9 12.2 13.2 11.9 8.8 6.0 10.4 2003 8.0 7.5 8.6 8.5 11.6 11.8 11.9 12.3 12.4 11.7 9.4 6.6 10.1 MEAN 7.7 8.3 8.9 10.0 10.9 11.6 11.2 11.5 11.7 10.7 8.9 7.5 9.9 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 5 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF MEAN DAILY TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 1.6 2.9 8.1 13.5 20.0 24.7 27.6 26.4 22.8 17.0 10.2 4.9 15.0 1989 -1.6 -0.9 8.2 15.8 19.5 26.3 28.6 27.5 22.9 18.1 10.3 5.4 15.0 1990 0.2 2.3 8.0 13.7 21.4 26.8 28.2 28.5 26.0 16.3 11.9 4.6 15.7 1991 1.8 1.8 7.3 15.2 18.2 24.5 28.1 27.5 23.1 16.7 10.3 3.4 14.8 1992 -0.5 1.9 3.9 12.9 15.4 23.6 29.2 25.2 21.0 16.1 10.9 3.9 13.6 1993 -0.1 3.4 6.7 14.5 18.4 24.9 27.4 26.8 24.5 14.9 7.1 5.5 14.5 1994 4.4 3.9 10.2 15.7 19.1 25.2 28.9 28.9 20.8 15.3 10.5 1.9 15.4 1995 5.0 5.9 9.6 14.4 18.7 24.0 30.0 29.5 22.8 15.4 10.9 2.1 15.7 1996 0.8 4.9 5.4 13.1 19.9 25.3 26.9 26.9 24.4 15.6 8.9 6.5 14.9 1997 4.5 3.6 5.9 14.1 19.5 25.6 30.0 28.9 22.6 18.0 8.7 4.3 15.5 1998 0.9 2.8 8.1 16.0 19.3 26.2 28.2 27.4 23.2 17.2 13.1 9.1 16.0 1999 3.4 7.6 8.5 15.0 21.3 26.3 26.4 27.9 23.3 17.9 8.1 5.7 16.0 2000 3.2 4.5 8.7 17.9 22.6 25.8 27.7 27.8 24.7 15.3 7.7 4.8 15.9 2001 2.8 5.6 11.9 17.8 21.5 26.0 27.7 27.7 23.4 17.6 10.0 7.0 16.6 2002 3.5 7.0 11.3 13.1 19.5 24.9 27.8 28.9 25.4 20.3 10.3 2.6 16.2 2003 4.9 5.0 8.2 14.6 18.1 24.8 29.9 26.9 22.8 19.2 9.1 4.2 15.6 MEAN 2.2 3.9 8.1 14.8 19.5 25.3 28.3 27.7 23.4 16.9 9.9 4.7 15.4 SD 2.08 2.15 2.08 1.54 1.70 0.90 1.07 1.10 1.40 1.52 1.55 1.85 1.58 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 6 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M TEMPERATURE RECORDS LOWEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 -6.4 -8.0 -3.5 -1.3 9.0 15.5 15.6 16.8 12.8 6.6 -5.2 -9.6 -9.6 DAY 30 7 6 2 7 27 28 26 30 23 15 29 1989 -11.4 -11.0 -4.5 0.8 7.6 15.1 19.4 19.0 8.8 6.4 0.2 -2.0 -11.4 DAY 31 15 31 1 2 8 25 20 23 25 23 9 1990 -11.3 -5.8 -4.6 2.4 8.5 16.8 19.4 20.1 18.5 5.0 1.5 -9.2 -11.3 DAY 12 13 21 5 14 7 13 30 3 30 14 28 1991 -5.8 -10.5 -4.2 4.0 5.4 15.6 18.0 18.0 9.6 9.6 1.8 -4.8 -10.5 DAY 28 13 11 6 7 13 15 27 27 18 27 20 1992 -9.4 -7.0 -8.0 1.5 3.0 14.0 20.6 13.5 12.4 7.0 -4.0 -7.0 -9.4 DAY 28 12 12 3 5 5 14 31 30 18 27 29 1993 -9.1 -5.6 -5.0 4.0 7.6 14.2 20.0 18.0 13.0 4.8 -3.4 -3.0 -9.1 DAY 14 18 23 14 1 6 17 5 30 9 30 1 1994 -2.0 -6.0 0.4 2.0 7.0 13.2 17.0 21.0 11.2 8.0 1.0 -9.4 -9.4 DAY 7 4 17 5 7 6 1 16 22 12 10 7 1995 -3.0 -2.0 0.0 5.0 7.0 13.0 18.6 21.4 9.6 2.6 -3.4 -4.6 -4.6 DAY 23 26 7 7 9 1 1 10 22 27 26 15 1996 -8.0 -4.4 -3.0 1.6 10.6 16.2 17.4 17.6 14.4 4.6 -1.4 -1.6 -8.0 DAY 20 6 1 5 2 8 16 31 21 17 14 3 1997 -8.8 -8.6 -6.2 -1.6 6.6 16.0 19.4 18.6 11.6 6.8 1.0 -4.0 -8.8 DAY 29 7 8 12 6 2 7 30 15 25 29 28 1998 -9.4 -9.4 -4.8 3.0 7.0 15.4 18.2 17.6 14.2 7.0 5.0 -1.0 -9.4 DAY 14 17 3 25 4 1 21 6 13 11 25 6 1999 -5.0 -4.0 -2.4 3.8 8.6 17.8 15.6 18.0 10.6 6.0 -2.6 -2.0 -5.0 DAY 4 22 19 10 22 6 15 31 28 28 30 1 2000 -8.4 -5.0 -3.2 7.6 11.0 12.2 17.4 17.8 13.6 7.0 -2.0 -1.4 -8.4 DAY 18 10 16 1 2 14 20 13 26 6 11 13 2001 -10.4 -3.6 0.6 6.6 11.0 13.6 17.0 17.2 11.5 8.2 -2.8 -1.8 -10.4 DAY 28 23 11 10 4 12 19 12 22 31 20 22 2002 -6.8 -3.4 0.0 1.6 6.8 13.2 18.0 20.0 15.0 8.6 -0.4 -5.0 -6.8 DAY 13 1 10 4 5 8 31 22 26 21 30 23 2003 -3.2 -3.6 -4.6 2.6 5.0 12.0 20.0 19.0 12.0 11.0 -0.6 -5.6 -5.6 DAY 21 18 2 18 1 7 3 31 29 6 24 14 1988-2003 -11.4 -11.0 -8.0 -1.6 3.0 12.0 15.6 13.5 8.8 2.6 -5.2 -9.6 -11.4 YEAR-DAY 89-31 89-15 92-12 97-12 92- 5 3- 7 88-28 92-31 89-23 95-27 88-15 88-29 89 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 7 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M TEMPERATURE RECORDS HIGHEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 9.6 13.8 20.4 25.6 31.2 35.4 37.3 35.9 33.6 25.4 21.8 17.0 37.3 DAY 10 28 20 19 28 13 3 12 10 6 5 8 1989 9.0 12.0 18.8 25.8 32.4 37.8 38.0 36.0 34.4 29.0 20.6 16.4 38.0 DAY 20 28 27 28 25 30 12 4 2 8 28 1 1990 8.0 13.1 18.4 27.0 32.4 36.0 37.4 36.6 34.2 27.0 22.0 17.0 37.4 DAY 5 28 5 27 25 29 28 5 14 1 5 4 1991 9.2 13.0 19.0 27.0 29.5 35.0 36.3 37.5 34.4 24.4 22.0 13.0 37.5 DAY 31 27 30 22 29 29 30 6 8 27 3 10 1992 7.7 11.0 17.0 24.0 28.4 35.0 37.8 35.0 29.5 26.0 20.6 12.4 37.8 DAY 20 22 29 21 30 30 5 1 25 11 1 2 1993 11.6 13.0 20.0 25.6 29.4 36.0 36.2 36.2 34.5 29.0 17.4 14.0 36.2 DAY 29 28 30 19 20 28 3 14 5 1 3 24 1994 14.0 14.2 22.2 28.6 30.0 33.6 38.6 38.0 31.0 24.0 18.8 13.4 38.6 DAY 31 27 31 24 25 20 30 1 1 15 3 2 1995 15.0 15.0 19.8 25.0 28.2 33.2 39.6 38.2 33.0 28.2 21.6 10.8 39.6 DAY 31 4 24 30 22 29 16 6 9 4 1 2 1996 10.6 15.4 19.4 23.6 31.6 34.4 36.0 35.6 33.4 25.0 19.2 16.6 36.0 DAY 2 10 30 21 31 4 19 22 11 1 3 27 1997 13.6 14.6 16.8 27.4 33.0 34.4 38.4 38.2 33.2 28.0 16.6 12.2 38.4 DAY 1 18 22 26 28 27 14 15 1 4 6 6 1998 8.0 13.6 19.2 28.4 30.2 36.0 38.6 35.8 33.6 29.2 22.0 19.0 38.6 DAY 27 7 24 15 11 28 11 17 3 1 3 16 1999 10.6 17.6 19.4 25.6 33.6 36.0 37.6 36.0 33.6 28.0 18.2 16.6 37.6 DAY 30 28 26 30 31 28 4 1 15 6 20 31 2000 16.4 15.8 18.6 27.8 32.4 37.0 37.4 37.2 35.6 25.2 19.8 11.2 37.4 DAY 1 24 21 20 26 29 11 3 8 26 4 22 2001 14.2 16.6 23.8 27.0 33.4 37.8 38.0 38.0 33.4 28.0 22.0 16.8 38.0 DAY 13 28 31 5 15 27 10 3 5 1 6 31 2002 15.5 17.4 23.2 24.0 32.0 35.0 38.4 39.0 34.4 31.2 21.8 11.2 39.0 DAY 1 26 27 28 29 13 19 10 3 3 11 8 2003 16.2 13.4 18.4 27.2 28.8 35.4 39.8 36.2 33.2 29.0 19.2 14.2 39.8 DAY 13 9 25 7 22 23 17 15 7 2 1 19 1988-2003 16.4 17.6 23.8 28.6 33.6 37.8 39.8 39.0 35.6 31.2 22.0 19.0 39.8 YEAR-DAY 0- 1 99-28 1-31 94-24 99-31 89-30 3-17 2-10 0- 8 2- 3 90- 5 98-16 3 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 8 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M 0C COOLING DEGREE DAYS (BASE 21) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 0.0 0.0 0.0 0.0 18.4 112.1 205.7 168.0 64.3 0.0 0.0 0.0 568.6 1989 0.0 0.0 0.0 0.0 37.2 160.0 236.6 201.8 90.1 8.4 0.0 0.0 734.1 1990 0.0 0.0 0.0 1.9 43.4 174.1 216.9 231.2 149.9 2.0 0.0 0.0 819.6 1991 0.0 0.0 0.0 0.0 5.5 104.7 218.9 197.2 91.0 0.0 0.0 0.0 617.4 1992 0.0 0.0 0.0 0.0 3.2 81.8 254.7 135.0 17.1 0.0 0.0 0.0 491.8 1993 0.0 0.0 0.0 0.1 13.4 119.3 198.2 179.9 109.3 1.2 0.0 0.0 621.4 1994 0.0 0.0 0.0 4.9 19.6 128.0 244.2 244.4 22.1 0.0 0.0 0.0 663.2 1995 0.0 0.0 0.0 0.0 8.5 94.4 277.5 262.9 75.1 1.5 0.0 0.0 720.0 1996 0.0 0.0 0.0 0.0 26.8 130.4 183.2 181.4 106.7 0.0 0.0 0.0 628.6 1997 0.0 0.0 0.0 0.1 22.9 137.4 277.5 244.2 56.6 2.4 0.0 0.0 741.2 1998 0.0 0.0 0.0 4.0 16.7 155.7 224.5 199.9 71.1 7.7 0.0 0.0 679.6 1999 0.0 0.0 0.0 0.0 43.7 160.4 168.8 215.0 85.8 1.4 0.0 0.0 675.1 2000 0.0 0.0 0.0 0.3 59.0 152.1 207.5 212.2 112.3 0.0 0.0 0.0 743.4 2001 0.0 0.0 0.0 1.3 44.9 157.0 207.1 207.1 86.7 2.3 0.0 0.0 706.5 2002 0.0 0.0 0.0 0.0 24.8 119.2 210.5 244.1 133.2 27.5 0.0 0.0 759.4 2003 0.0 0.0 0.0 1.8 7.4 118.6 276.8 183.9 68.0 4.4 0.0 0.0 661.0 MEAN 0.0 0.0 0.0 0.9 24.7 131.6 225.6 206.8 83.7 3.7 0.0 0.0 677.0 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 9 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M 0C HEATING DEGREE DAYS (BASE 18) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 509.5 437.3 306.8 141.9 13.3 0.0 0.0 0.0 0.1 41.9 235.2 404.6 2090.5 1989 608.2 528.7 302.6 76.3 30.5 0.0 0.0 0.0 8.3 37.8 232.3 390.9 2215.6 1990 551.6 439.4 309.5 144.1 6.6 0.0 0.0 0.0 0.0 69.3 184.1 415.8 2120.3 1991 503.1 453.9 332.7 97.1 34.3 0.0 0.0 0.0 11.3 44.7 231.8 435.3 2144.3 1992 574.3 466.6 437.5 154.3 100.1 0.0 0.0 0.0 2.3 65.2 212.7 438.4 2451.4 1993 560.2 409.8 348.7 111.0 37.4 0.0 0.0 0.0 0.0 103.9 327.0 388.3 2286.3 1994 420.8 395.2 240.9 91.3 31.8 0.0 0.0 0.0 1.5 84.4 225.2 498.0 1989.1 1995 403.2 338.7 259.0 108.6 26.4 0.0 0.0 0.0 3.0 97.2 213.5 493.2 1942.8 1996 533.7 379.4 389.4 148.3 11.1 0.0 0.0 0.0 0.0 76.3 273.6 356.4 2168.2 1997 419.1 403.0 375.5 132.6 17.7 0.0 0.0 0.0 0.7 31.8 279.7 424.2 2084.4 1998 531.5 425.1 306.5 83.1 23.0 0.0 0.0 0.0 0.0 54.2 147.3 276.1 1846.7 1999 451.7 291.2 295.1 95.0 6.4 0.0 0.0 0.0 2.6 43.1 296.0 380.0 1861.1 2000 460.2 392.9 289.3 28.2 0.0 0.2 0.0 0.0 0.0 87.7 309.9 407.7 1976.1 2001 471.5 345.9 188.7 33.0 3.3 2.5 0.0 0.0 3.5 33.9 240.9 342.5 1665.6 2002 449.1 308.4 206.6 150.2 28.0 0.0 0.0 0.0 0.0 16.3 230.6 477.1 1866.3 2003 407.5 364.3 303.8 119.9 34.1 0.0 0.0 0.0 0.0 8.5 266.8 428.2 1933.1 MEAN 491.0 398.8 305.8 107.2 25.2 0.2 0.0 0.0 2.1 56.0 244.2 409.8 2040.3 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 10 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF DEW POINT TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 -3.4 -4.2 -3.6 1.7 1.6 2.1 8.8 8.0 4.3 2.4 -0.2 -2.7 1.2 1989 -7.1 -6.6 0.3 -1.5 2.9 3.8 8.0 7.1 4.6 1.4 -0.7 -1.6 0.9 1990 -5.3 -3.5 -2.3 -1.5 2.6 3.0 8.6 9.8 3.0 2.9 0.4 -3.5 1.2 1991 -2.8 -5.2 0.9 1.5 2.3 4.7 8.2 6.4 4.3 3.3 -0.2 -3.3 1.7 1992 -6.9 -5.8 -4.2 1.4 5.0 6.3 6.8 7.1 2.7 2.8 -0.8 -3.3 0.9 1993 -6.7 -3.4 -5.1 -0.3 3.9 4.5 8.9 10.8 9.1 2.3 1.7 -0.4 2.1 1994 -2.0 -4.6 -1.0 3.0 3.8 6.3 8.0 7.1 4.0 6.4 2.8 -5.9 2.3 1995 -3.5 -2.3 -2.1 3.2 5.8 6.9 9.6 7.1 5.6 2.4 -4.2 -4.8 2.0 1996 -4.9 -0.7 -1.0 1.8 6.8 7.5 8.6 8.1 3.6 2.5 -1.3 -2.9 2.3 1997 -4.7 -9.4 -3.8 -0.6 3.2 5.9 8.5 6.2 2.6 1.9 2.1 -1.1 0.9 1998 -4.4 -4.2 -2.6 1.6 5.8 5.8 9.3 10.5 6.8 2.5 -1.1 -0.3 2.5 1999 -2.8 -4.1 -3.3 0.9 4.3 8.8 8.9 8.8 7.0 3.9 3.0 -0.6 2.9 2000 -4.0 -4.8 -3.5 2.2 4.2 6.2 8.0 7.8 5.9 4.8 1.7 0.2 2.4 2001 -3.8 -4.3 -0.3 0.2 3.4 4.6 8.6 7.2 4.6 2.7 -0.1 0.2 1.9 2002 -3.5 -4.0 -2.8 4.4 4.8 4.8 8.7 7.7 3.4 2.3 1.1 -2.7 2.0 2003 -2.6 -3.0 -2.6 3.6 3.6 6.3 9.5 8.7 6.0 3.1 -1.1 -1.5 2.5 MEAN -4.3 -4.4 -2.3 1.4 4.0 5.5 8.6 8.0 4.8 3.0 0.2 -2.1 1.9 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 11 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF MIXING RATIO IN G/KG YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 3.60 3.45 3.67 5.47 5.31 5.46 8.74 8.23 6.31 5.60 4.69 3.87 5.37 1989 2.75 2.85 4.72 4.18 5.73 6.13 8.15 7.62 6.41 5.11 4.45 4.15 5.19 1990 3.19 3.61 3.94 4.26 5.69 5.79 8.47 9.17 5.87 5.77 4.77 3.66 5.35 1991 3.78 3.28 5.05 5.22 5.61 6.53 8.34 7.45 6.48 5.86 4.49 3.69 5.48 1992 2.82 3.08 3.61 5.21 6.72 7.26 7.67 7.73 5.65 5.75 4.45 3.80 5.31 1993 2.81 3.73 3.31 4.64 6.18 6.45 8.65 9.79 8.71 5.45 5.33 4.43 5.79 1994 4.06 3.31 4.35 5.78 6.08 7.36 8.19 7.73 6.20 7.24 5.77 3.16 5.77 1995 3.59 3.90 4.08 5.90 7.03 7.60 9.20 7.64 6.86 5.51 3.56 3.24 5.67 1996 3.25 4.38 4.34 5.36 7.47 8.03 8.53 8.20 6.02 5.55 4.18 3.74 5.75 1997 3.29 2.36 3.61 4.57 5.79 7.06 8.47 7.24 5.57 5.30 5.36 4.25 5.24 1998 3.40 3.45 4.01 5.33 6.98 6.92 8.95 9.64 7.51 5.51 4.26 4.49 5.87 1999 3.81 3.54 3.71 5.10 6.29 8.60 8.74 8.52 7.55 6.06 5.92 4.39 6.02 2000 3.48 3.26 3.67 5.47 6.26 7.14 8.17 8.02 7.00 6.46 5.20 4.68 5.73 2001 3.50 3.37 4.55 4.70 5.98 6.52 8.51 7.75 6.44 5.74 4.60 4.78 5.54 2002 3.61 3.44 3.91 6.42 6.51 6.54 8.53 8.03 5.93 5.42 5.02 3.89 5.60 2003 3.77 3.73 3.93 6.08 6.09 7.30 9.06 8.51 7.08 5.79 4.35 4.22 5.83 MEAN 3.42 3.42 4.03 5.23 6.23 6.92 8.52 8.20 6.60 5.76 4.77 4.03 5.59 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 12 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF VAPOUR PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 4.85 4.65 4.92 7.35 7.14 7.32 11.62 10.97 8.49 7.57 6.34 5.22 7.20 1989 3.71 3.86 6.34 5.65 7.71 8.21 10.89 10.20 8.60 6.91 6.02 5.60 6.98 1990 4.31 4.86 5.32 5.73 7.64 7.75 11.30 12.24 7.89 7.79 6.45 4.95 7.18 1991 5.10 4.42 6.79 7.03 7.52 8.74 11.12 9.96 8.70 7.91 6.08 4.97 7.36 1992 3.81 4.14 4.86 6.99 9.02 9.71 10.24 10.36 7.62 7.76 6.02 5.13 7.14 1993 3.81 5.03 4.47 6.24 8.30 8.64 11.55 13.08 11.67 7.38 7.19 5.99 7.78 1994 5.47 4.46 5.86 7.77 8.18 9.82 10.90 10.32 8.36 9.77 7.77 4.27 7.75 1995 4.85 5.26 5.49 7.92 9.45 10.15 12.22 10.21 9.20 7.44 4.81 4.39 7.62 1996 4.40 5.90 5.82 7.21 10.02 10.73 11.41 10.98 8.09 7.49 5.67 5.06 7.73 1997 4.44 3.19 4.84 6.14 7.78 9.44 11.27 9.69 7.51 7.16 7.25 5.74 7.04 1998 4.58 4.65 5.39 7.16 9.37 9.29 11.93 12.87 10.07 7.45 5.77 6.09 7.88 1999 5.15 4.78 5.00 6.87 8.45 11.47 11.64 11.39 10.12 8.18 7.97 5.96 8.08 2000 4.69 4.40 4.95 7.36 8.40 9.55 10.92 10.73 9.39 8.71 7.03 6.32 7.70 2001 4.73 4.55 6.12 6.33 8.02 8.72 11.34 10.38 8.66 7.75 6.21 6.47 7.44 2002 4.88 4.64 5.26 8.60 8.72 8.75 11.40 10.73 7.99 7.32 6.80 5.25 7.53 2003 5.09 5.02 5.29 8.16 8.19 9.75 12.04 11.39 9.51 7.81 5.88 5.72 7.82 MEAN 4.62 4.61 5.42 7.03 8.37 9.25 11.36 10.97 8.87 7.77 6.45 5.45 7.51 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 13 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF SATURATION DEFICIT PRESSURE IN HPA YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 1.93 3.10 6.24 9.08 17.81 25.64 26.82 24.29 19.70 11.67 6.18 3.53 13.00 1989 1.69 2.02 4.56 13.17 16.24 27.85 29.76 27.54 20.21 14.05 6.47 3.21 13.90 1990 1.84 2.42 5.85 10.82 19.12 28.81 27.47 26.96 25.62 11.07 7.45 3.73 14.26 1991 1.79 2.72 3.54 11.06 14.18 23.04 27.67 27.34 20.45 10.89 6.48 2.79 12.66 1992 2.00 2.88 3.39 8.17 9.29 20.59 31.17 22.40 17.64 10.55 6.94 2.97 11.50 1993 2.40 2.85 5.71 10.72 13.81 24.70 26.14 23.35 19.75 9.74 3.01 3.09 12.11 1994 2.88 3.67 6.77 10.76 14.93 23.33 30.01 30.25 16.60 7.36 4.86 2.93 12.86 1995 3.78 4.02 6.80 8.82 12.66 20.72 31.08 31.53 19.07 10.48 8.60 2.69 13.35 1996 2.11 2.78 3.33 8.18 14.12 22.32 24.89 26.00 23.15 10.46 5.68 4.50 12.29 1997 3.98 5.04 4.78 10.85 15.74 24.16 31.67 31.08 20.72 13.80 3.88 2.49 14.01 1998 1.87 3.06 5.88 11.63 13.80 25.88 27.21 24.60 19.07 12.39 9.20 5.35 13.33 1999 2.61 5.73 6.43 10.62 18.16 24.65 24.34 27.35 19.47 12.59 2.92 3.20 13.17 2000 3.01 4.18 6.65 13.60 20.28 25.78 27.56 27.48 22.18 8.87 3.53 2.25 13.78 2001 2.84 4.67 8.32 14.58 18.51 27.00 26.82 28.13 20.84 12.46 6.03 3.45 14.47 2002 3.03 5.62 8.51 6.85 15.12 24.52 27.29 29.77 25.38 16.77 5.73 2.01 14.22 2003 3.52 3.68 5.69 9.01 13.49 23.07 31.37 25.01 18.96 14.40 5.72 2.54 13.04 MEAN 2.58 3.65 5.78 10.50 15.45 24.50 28.20 27.07 20.55 11.72 5.79 3.17 13.25 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 14 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 74 65 48 48 32 24 33 33 33 43 54 63 46 1989 71 69 62 33 36 25 28 29 33 37 50 65 45 1990 71 70 52 39 31 23 31 33 25 44 49 62 44 1991 76 64 69 42 38 30 30 28 33 44 52 67 48 1992 67 60 60 50 56 34 26 34 32 44 49 64 48 1993 65 65 49 40 41 28 32 38 40 47 72 69 49 1994 67 58 50 46 39 31 29 27 36 60 63 60 47 1995 58 60 47 50 46 35 30 26 36 45 38 64 45 1996 70 72 68 51 46 35 33 32 28 45 53 56 49 1997 55 41 54 39 36 30 28 25 29 37 68 72 43 1998 72 64 52 42 44 28 32 36 37 42 41 57 46 1999 68 48 49 41 34 33 36 31 37 44 75 68 47 2000 64 55 45 37 31 29 30 30 32 54 69 75 46 2001 67 52 47 32 33 28 32 30 33 42 54 67 43 2002 65 49 41 60 40 28 32 29 26 34 58 73 45 2003 63 61 51 53 41 32 30 33 36 39 53 71 47 MEAN 67 60 53 44 39 30 31 31 33 44 56 66 45 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 15 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF MAXIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 91 85 67 68 50 38 49 47 47 57 72 78 62 1989 85 86 78 48 52 39 39 39 44 50 66 82 59 1990 86 86 72 59 47 33 43 42 35 59 63 76 58 1991 90 81 85 59 54 43 42 40 47 58 69 85 63 1992 85 80 78 71 72 49 35 49 43 55 67 82 64 1993 79 81 69 58 58 42 43 51 51 64 86 84 64 1994 84 76 69 63 58 45 40 36 51 76 80 76 63 1995 76 78 64 70 65 51 41 38 49 59 53 78 60 1996 85 87 86 71 65 51 45 44 39 62 69 73 65 1997 70 57 74 55 52 43 38 35 41 51 83 86 57 1998 87 81 69 61 63 39 46 48 50 56 55 72 61 1999 82 66 65 59 48 44 52 42 49 58 86 81 61 2000 79 71 60 50 44 41 41 41 44 68 83 87 59 2001 79 69 63 45 50 40 45 43 46 59 73 83 58 2002 80 68 60 77 56 41 48 39 37 47 75 87 60 2003 78 77 71 71 60 48 43 47 50 54 71 85 63 MEAN 82 77 71 62 56 43 43 43 45 58 72 81 61 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 16 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF MINIMUM RELATIVE HUMIDITY IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 54 47 31 32 19 15 22 22 22 28 38 45 31 1989 52 48 45 21 24 17 20 20 24 24 34 46 31 1990 54 51 34 24 20 14 22 25 17 30 34 45 31 1991 57 45 52 28 24 19 21 19 23 32 37 47 34 1992 45 41 44 32 39 23 18 24 22 34 33 45 33 1993 48 46 32 27 26 18 24 26 27 31 56 52 34 1994 49 41 34 32 25 21 20 19 24 43 46 42 33 1995 41 45 34 33 31 24 22 17 24 30 23 50 31 1996 51 57 52 34 30 23 23 22 18 30 36 38 35 1997 39 26 38 28 25 20 19 17 18 24 50 54 30 1998 53 47 36 28 30 19 23 27 25 27 29 42 32 1999 51 33 33 29 24 25 23 22 26 30 61 51 34 2000 47 39 32 26 21 21 21 21 22 40 54 61 34 2001 53 36 34 21 22 18 22 19 21 25 36 50 30 2002 47 33 25 45 28 19 21 20 16 21 40 57 31 2003 46 43 32 38 26 20 19 22 24 21 35 55 32 MEAN 49 42 37 30 26 20 21 21 22 29 40 49 32 RH=0 =====> RELATIVE HUMIDITY < 0.5% =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 17 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF RELATIVE HUMIDITY AT 03 UTC. IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 85 76 60 60 48 37 46 45 42 53 63 70 57 1989 80 79 70 42 46 37 38 38 41 43 62 74 54 1990 75 81 61 50 44 32 41 40 30 55 58 68 53 1991 81 69 76 51 50 40 39 35 39 54 64 74 56 1992 75 69 70 62 62 44 33 42 39 51 60 71 57 1993 72 72 60 49 51 38 41 48 48 55 79 75 57 1994 75 69 62 56 51 41 36 33 46 70 74 68 57 1995 66 67 58 64 56 48 38 34 45 56 47 71 54 1996 73 79 76 62 59 46 43 41 37 56 64 67 59 1997 66 53 64 48 45 40 36 32 38 46 77 77 52 1998 77 73 64 53 58 38 43 47 47 51 50 64 55 1999 78 56 57 55 45 43 50 41 47 54 83 78 57 2000 73 65 56 46 43 40 41 39 41 64 77 82 56 2001 71 65 57 43 44 39 44 41 44 55 64 75 54 2002 74 64 56 71 53 41 46 37 35 44 67 79 56 2003 72 70 62 64 56 47 42 46 48 51 68 78 59 MEAN 75 69 63 55 51 41 41 40 42 54 66 73 56 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 18 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF RELATIVE HUMIDITY AT 09 UTC. IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 59 54 41 39 23 17 26 26 25 32 41 51 36 1989 57 52 53 25 28 20 24 22 27 27 37 50 35 1990 62 59 41 29 23 17 24 28 19 34 35 48 35 1991 64 54 61 35 31 22 24 23 26 34 42 53 39 1992 54 50 51 42 50 27 21 27 24 38 36 49 39 1993 53 56 42 30 32 22 26 29 30 34 62 57 39 1994 53 49 41 36 29 28 23 20 26 47 51 50 38 1995 46 53 38 41 37 29 25 20 27 33 26 55 36 1996 57 65 60 42 37 27 27 25 22 33 40 43 40 1997 43 33 44 33 28 26 23 20 21 27 54 60 34 1998 62 55 46 33 36 23 28 30 28 31 30 45 37 1999 57 40 40 34 28 30 28 24 28 34 65 55 39 2000 54 45 38 30 24 23 24 23 24 44 58 65 38 2001 59 42 40 25 25 22 25 22 23 29 42 55 34 2002 54 39 29 52 34 22 26 23 17 23 45 63 36 2003 52 53 42 46 31 24 23 25 26 25 38 61 37 MEAN 55 50 44 36 31 24 25 24 25 33 44 54 37 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 19 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M AVERAGE OF RELATIVE HUMIDITY AT 15 UTC. IN PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 72 65 39 43 25 18 25 27 32 46 56 64 43 1989 71 71 59 29 30 20 23 26 33 37 51 70 43 1990 72 69 46 31 27 18 25 29 27 43 53 62 42 1991 77 66 65 37 31 23 25 27 32 45 51 69 46 1992 68 61 57 43 49 30 23 30 32 45 51 66 46 1993 65 63 43 37 35 22 27 33 40 48 72 72 46 1994 67 55 42 41 34 25 23 23 30 56 64 57 43 1995 56 57 42 42 42 28 24 22 32 43 38 64 41 1996 71 71 65 43 40 29 28 27 26 44 52 54 46 1997 51 34 46 32 29 22 21 22 25 34 67 74 38 1998 74 59 48 36 36 22 26 31 34 41 42 57 42 1999 65 43 44 33 28 28 27 26 33 40 74 67 42 2000 62 51 38 31 25 24 24 25 30 52 68 76 42 2001 66 49 41 27 27 21 25 25 31 39 53 67 39 2002 63 40 37 53 33 22 24 24 26 34 58 71 40 2003 62 58 44 46 32 24 24 28 34 38 53 70 43 MEAN 66 57 47 38 33 24 25 27 31 43 56 66 43 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 20 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M NO. OF DAYS WITH MAXIMUM TEMPERATURE EQUAL 30 AND ABOVE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 0 0 0 0 1 19 29 26 10 0 0 0 85 1989 0 0 0 0 8 23 31 29 14 0 0 0 105 1990 0 0 0 0 8 27 27 30 23 0 0 0 115 1991 0 0 0 0 0 16 29 29 15 0 0 0 89 1992 0 0 0 0 0 12 31 20 0 0 0 0 63 1993 0 0 0 0 0 19 31 27 18 0 0 0 95 1994 0 0 0 0 2 22 31 31 3 0 0 0 89 1995 0 0 0 0 0 17 31 31 15 0 0 0 94 1996 0 0 0 0 2 18 29 28 20 0 0 0 97 1997 0 0 0 0 4 25 31 31 8 0 0 0 99 1998 0 0 0 0 1 24 29 25 10 0 0 0 89 1999 0 0 0 0 7 29 22 31 17 0 0 0 106 2000 0 0 0 0 9 23 31 31 16 0 0 0 110 2001 0 0 0 0 5 23 29 28 16 0 0 0 101 2002 0 0 0 0 4 21 30 31 26 2 0 0 114 2003 0 0 0 0 0 19 31 31 15 0 0 0 96 MEAN 0.0 0.0 0.0 0.0 3.2 21.1 29.5 28.7 14.1 0.1 0.0 0.0 96.7 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 21 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M NO. OF DAYS WITH MAXIMUM TEMPERATURE EQUAL 00 AND BELOW YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 0 1 0 0 0 0 0 0 0 0 0 0 1 1989 4 4 0 0 0 0 0 0 0 0 0 0 8 1990 2 0 0 0 0 0 0 0 0 0 0 0 2 1991 0 3 0 0 0 0 0 0 0 0 0 1 4 1992 7 1 1 0 0 0 0 0 0 0 0 1 10 1993 3 0 0 0 0 0 0 0 0 0 0 0 3 1994 0 0 0 0 0 0 0 0 0 0 0 2 2 1995 0 0 0 0 0 0 0 0 0 0 0 2 2 1996 5 1 0 0 0 0 0 0 0 0 0 0 6 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 3 0 0 0 0 0 0 0 0 0 0 0 3 2002 0 0 0 0 0 0 0 0 0 0 0 0 0 2003 0 1 0 0 0 0 0 0 0 0 0 1 2 MEAN 1.5 0.7 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.7 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 22 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M NO. OF DAYS WITH MINIMUM TEMPERATURE EQUAL 21 AND ABOVE YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 0 0 0 0 0 5 23 17 1 0 0 0 46 1989 0 0 0 0 2 14 24 20 8 0 0 0 68 1990 0 0 0 0 2 19 23 27 13 0 0 0 84 1991 0 0 0 0 0 6 27 24 5 0 0 0 62 1992 0 0 0 0 0 8 30 13 0 0 0 0 51 1993 0 0 0 0 0 9 22 18 9 0 0 0 58 1994 0 0 0 0 0 8 27 31 0 0 0 0 66 1995 0 0 0 0 0 3 28 31 2 0 0 0 64 1996 0 0 0 0 0 11 19 14 3 0 0 0 47 1997 0 0 0 0 1 8 29 26 3 0 0 0 67 1998 0 0 0 0 1 12 27 23 2 0 0 0 65 1999 0 0 0 0 1 9 16 27 2 0 0 0 55 2000 0 0 0 0 1 12 15 25 7 0 0 0 60 2001 0 0 0 0 3 13 21 20 1 0 0 0 58 2002 0 0 0 0 0 7 19 26 4 0 0 0 56 2003 0 0 0 0 0 10 28 15 0 0 0 0 53 MEAN 0.0 0.0 0.0 0.0 0.7 9.6 23.6 22.3 3.7 0.0 0.0 0.0 59.9 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 23 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M NO. OF DAYS WITH MINIMUM TEMPERATURE EQUAL -4 AND BELOW YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 9 6 0 0 0 0 0 0 0 0 1 4 20 1989 23 17 1 0 0 0 0 0 0 0 0 0 41 1990 12 4 1 0 0 0 0 0 0 0 0 6 23 1991 4 10 1 0 0 0 0 0 0 0 0 5 20 1992 16 9 5 0 0 0 0 0 0 0 2 2 34 1993 17 2 1 0 0 0 0 0 0 0 0 0 20 1994 0 2 0 0 0 0 0 0 0 0 0 14 16 1995 0 0 0 0 0 0 0 0 0 0 0 5 5 1996 13 1 0 0 0 0 0 0 0 0 0 0 14 1997 2 9 1 0 0 0 0 0 0 0 0 1 13 1998 9 5 1 0 0 0 0 0 0 0 0 0 15 1999 4 1 0 0 0 0 0 0 0 0 0 0 5 2000 5 2 0 0 0 0 0 0 0 0 0 0 7 2001 6 0 0 0 0 0 0 0 0 0 0 0 6 2002 4 0 0 0 0 0 0 0 0 0 0 3 7 2003 0 0 1 0 0 0 0 0 0 0 0 2 3 MEAN 7.7 4.2 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 2.6 15.5 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 24 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M NO. OF DAYS WITH MINIMUM TEMPERATURE EQUAL 00 AND BELOW YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 27 22 5 1 0 0 0 0 0 0 5 12 72 1989 31 28 2 0 0 0 0 0 0 0 0 13 74 1990 25 21 6 0 0 0 0 0 0 0 0 11 63 1991 25 19 4 0 0 0 0 0 0 0 0 16 64 1992 27 24 17 0 0 0 0 0 0 0 3 13 84 1993 27 13 10 0 0 0 0 0 0 0 8 9 67 1994 20 17 0 0 0 0 0 0 0 0 0 19 56 1995 12 4 1 0 0 0 0 0 0 0 5 28 50 1996 23 8 8 0 0 0 0 0 0 0 5 8 52 1997 13 17 9 1 0 0 0 0 0 0 0 11 51 1998 28 20 7 0 0 0 0 0 0 0 0 2 57 1999 18 4 3 0 0 0 0 0 0 0 4 7 36 2000 20 16 4 0 0 0 0 0 0 0 3 8 51 2001 18 10 0 0 0 0 0 0 0 0 3 4 35 2002 21 9 1 0 0 0 0 0 0 0 1 19 51 2003 13 9 3 0 0 0 0 0 0 0 2 14 41 MEAN 21.7 15.1 5.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 2.4 12.1 56.4 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 25 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M MONTHLY TOTAL OF PRECIPITATION IN MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 74.1 76.7 102.1 65.3 6.8 1.9 19.3 10.0 0.3 38.6 18.6 90.5 504.2 1989 78.1 55.2 75.8 7.4 23.0 1.0 1.0 0.0 0.0 3.9 6.1 88.1 339.6 1990 67.8 69.9 46.8 31.0 6.5 0.0 0.2 0.0 0.0 15.8 13.0 47.0 298.0 1991 31.0 64.8 150.4 41.1 9.5 7.0 0.0 0.0 0.3 8.6 0.9 112.2 425.8 1992 63.3 67.8 113.1 76.0 83.1 13.8 0.4 20.0 0.0 0.0 10.0 71.3 518.8 1993 56.7 153.1 96.3 38.5 13.9 4.0 0.1 0.2 0.0 10.9 94.1 19.6 487.4 1994 63.8 61.6 30.9 45.9 34.5 1.8 0.0 0.0 1.3 27.2 191.7 18.2 476.9 1995 11.7 37.4 43.6 42.0 53.1 6.1 0.0 0.0 2.4 8.6 0.2 28.0 233.1 1996 66.1 144.7 218.1 83.1 60.4 10.4 0.2 4.0 0.0 28.1 0.6 25.6 641.3 1997 22.6 7.8 85.3 18.0 6.2 12.2 0.3 0.0 0.0 2.8 61.8 52.7 269.7 1998 107.6 98.2 83.0 46.2 47.6 4.9 0.8 3.9 17.4 5.0 1.4 80.7 496.7 1999 85.0 35.6 69.4 15.2 1.4 0.1 15.1 0.0 0.0 20.1 65.2 34.2 341.3 2000 65.1 71.0 20.6 3.8 0.5 0.1 0.0 0.0 5.7 73.0 47.8 95.4 383.0 2001 61.0 2.7 31.1 1.8 28.9 9.0 1.1 10.0 34.0 19.6 34.5 68.3 302.0 2002 63.2 14.8 46.0 126.4 19.2 0.0 10.2 0.0 0.0 1.9 56.9 150.5 489.1 2003 54.5 99.1 86.4 157.9 36.7 0.0 0.0 0.1 0.0 23.4 19.4 77.7 555.2 MEAN 60.7 66.3 81.2 50.0 27.0 4.5 3.0 3.0 3.8 18.0 38.9 66.2 422.6 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 26 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M GREATEST DAILY OF PRECIPITATION IN MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 15.0 22.0 34.6 11.3 3.8 0.9 12.0 10.0 0.3 32.0 7.8 49.0 49.0 DAY 16 17 1 27 6 30 19 25 3 16 13 17 1989 21.2 18.0 16.1 3.5 19.8 1.0 1.0 0.0 0.0 2.0 3.0 31.0 31.0 DAY 12 14 11 13 7 7 16 ** ** 31 2 4 1990 14.5 28.0 16.0 10.6 4.1 0.0 0.2 0.0 0.0 6.2 10.0 25.0 28.0 DAY 9 10 17 2 13 ** 5 ** ** 28 12 25 1991 8.6 14.0 42.0 31.0 3.0 3.0 0.0 0.0 0.3 4.0 0.5 36.0 42.0 DAY 21 22 6 4 24 18 ** ** 26 15 22 9 1992 18.9 21.0 23.0 32.6 21.2 6.7 0.2 13.0 0.0 0.0 8.0 19.3 32.6 DAY 17 25 15 27 2 4 9 29 ** ** 8 7 1993 26.0 36.0 27.0 12.0 5.0 2.0 0.0 0.2 0.0 4.4 18.0 11.0 36.0 DAY 8 3 8 8 13 1 ** 9 ** 7 2 16 1994 21.0 54.0 14.6 32.0 10.1 1.0 0.0 0.0 1.0 11.0 27.0 5.0 54.0 DAY 16 1 12 30 4 3 ** ** 6 23 25 3 1995 7.0 9.0 16.0 14.0 13.0 2.4 0.0 0.0 2.0 6.6 0.2 12.1 16.0 DAY 16 16 17 24 15 5 ** ** 21 25 10 12 1996 18.0 38.0 50.0 29.7 22.0 6.0 0.2 4.0 0.0 27.0 0.5 17.0 50.0 DAY 6 2 2 3 8 28 11 30 ** 16 8 22 1997 15.2 4.0 22.0 13.0 3.3 5.0 0.3 0.0 0.0 1.1 17.8 20.4 22.0 DAY 16 21 29 5 4 15 6 ** ** 31 1 10 1998 23.0 21.0 27.0 13.0 17.0 4.0 0.4 2.3 13.6 4.0 0.8 39.0 39.0 DAY 9 12 30 6 4 1 30 3 14 11 16 4 1999 35.0 15.0 25.0 7.6 1.1 0.1 5.0 0.0 0.0 13.1 25.0 12.0 35.0 DAY 9 8 21 22 10 17 26 ** ** 27 11 10 2000 24.0 43.0 7.0 3.0 0.4 0.1 0.0 0.0 5.0 24.0 17.7 32.0 43.0 DAY 28 14 24 21 4 13 ** ** 25 4 8 11 2001 20.0 1.0 18.1 1.4 13.0 9.0 0.7 9.8 19.0 10.2 9.0 16.0 20.0 DAY 20 19 10 26 4 12 18 12 19 26 18 5 2002 19.0 5.4 23.0 45.0 16.2 0.0 7.0 0.0 0.0 1.2 16.0 32.0 45.0 DAY 12 19 19 3 4 ** 29 ** ** 30 26 9 2003 22.3 19.0 33.0 39.0 14.0 0.0 0.0 0.1 0.0 7.3 11.0 16.5 39.0 DAY 28 14 26 16 27 ** ** 21 ** 30 29 27 1988-2003 35.0 54.0 50.0 45.0 22.0 9.0 12.0 13.0 19.0 32.0 27.0 49.0 54.0 YEAR-DAY 99- 9 94- 1 96- 2 2- 3 96- 8 1-12 88-19 92-29 1-19 88-16 94-25 88-17 94 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 27 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M NO. OF DAYS WITH PRECIPITATION EQUAL TO OR GREATER THAN 10 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 5 3 5 1 0 0 1 1 0 1 0 4 21 1989 2 2 3 0 1 0 0 0 0 0 0 3 11 1990 3 1 1 1 0 0 0 0 0 0 1 2 9 1991 0 3 5 1 0 0 0 0 0 0 0 3 12 1992 2 2 5 2 4 0 0 1 0 0 0 3 19 1993 2 6 5 2 0 0 0 0 0 0 4 1 20 1994 3 1 1 1 1 0 0 0 0 1 7 0 15 1995 0 0 2 2 2 0 0 0 0 0 0 1 7 1996 2 5 8 2 2 0 0 0 0 1 0 1 21 1997 1 0 4 1 0 0 0 0 0 0 3 1 10 1998 5 5 4 1 1 0 0 0 1 0 0 2 19 1999 3 2 3 0 0 0 0 0 0 1 4 1 14 2000 2 2 0 0 0 0 0 0 0 3 1 3 11 2001 2 0 1 0 1 0 0 0 2 1 0 2 9 2002 2 0 1 4 1 0 0 0 0 0 2 4 14 2003 2 5 4 6 1 0 0 0 0 0 1 3 22 MEAN 2.2 2.3 3.2 1.5 0.9 0.0 0.1 0.1 0.2 0.5 1.4 2.1 14.5 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 28 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M NO. OF DAYS WITH PRECIPITATION EQUAL TO OR GREATER THAN 5 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 5 5 6 5 0 0 1 1 0 2 1 4 30 1989 7 4 5 0 1 0 0 0 0 0 0 7 24 1990 4 5 4 3 0 0 0 0 0 1 1 2 20 1991 3 7 7 1 0 0 0 0 0 0 0 4 22 1992 7 4 10 5 7 1 0 2 0 0 1 6 43 1993 3 8 7 3 1 0 0 0 0 0 8 1 31 1994 5 1 1 2 4 0 0 0 0 1 10 1 25 1995 1 4 2 2 4 0 0 0 0 1 0 3 17 1996 5 7 14 5 4 1 0 0 0 1 0 2 39 1997 2 0 5 1 0 1 0 0 0 0 4 3 16 1998 7 8 5 3 2 0 0 0 1 0 0 2 28 1999 3 3 4 1 0 0 1 0 0 2 4 3 21 2000 4 4 2 0 0 0 0 0 1 3 3 5 22 2001 4 0 2 0 1 1 0 1 2 1 3 7 22 2002 4 1 3 5 1 0 1 0 0 0 4 8 27 2003 4 7 4 7 3 0 0 0 0 3 2 7 37 MEAN 4.2 4.2 5.1 2.7 1.7 0.3 0.2 0.3 0.3 0.9 2.6 4.1 26.6 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 29 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M NO. OF DAYS WITH PRECIPITATION EQUAL TO OR GREATER THAN 1 MM. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 8 10 7 11 2 0 3 1 0 2 5 5 54 1989 7 6 12 2 3 1 1 0 0 2 2 9 45 1990 14 9 7 7 2 0 0 0 0 4 3 5 51 1991 7 8 12 5 4 3 0 0 0 4 0 12 55 1992 9 9 14 10 12 5 0 2 0 0 2 9 72 1993 6 12 11 6 5 2 0 0 0 4 11 5 62 1994 6 4 8 5 5 1 0 0 1 7 11 5 53 1995 3 8 6 8 11 2 0 0 1 2 0 6 47 1996 9 12 19 12 7 3 0 1 0 2 0 3 68 1997 2 2 9 3 2 3 0 0 0 1 11 8 41 1998 8 10 10 7 9 1 0 2 2 2 0 3 54 1999 7 4 9 3 1 0 4 0 0 3 4 5 40 2000 8 5 4 1 0 0 0 0 1 6 8 8 41 2001 8 1 5 1 7 1 0 1 2 5 7 9 47 2002 9 4 6 11 2 0 2 0 0 1 8 15 58 2003 5 9 6 11 5 0 0 0 0 4 2 13 55 MEAN 7.2 7.1 9.1 6.4 4.8 1.4 0.6 0.4 0.4 3.1 4.6 7.5 52.6 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 30 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M NO. OF DAYS WITH PRECIPITATION YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 14 17 11 16 6 6 9 1 2 5 10 9 106 1989 13 9 17 6 8 1 1 1 1 4 5 13 79 1990 17 16 14 12 3 0 5 0 0 10 3 7 87 1991 17 13 20 8 11 4 0 0 1 8 4 16 102 1992 14 12 15 12 18 10 2 2 0 1 8 13 107 1993 11 15 14 9 12 2 4 3 0 6 14 7 97 1994 11 8 11 10 6 4 0 0 2 12 13 11 88 1995 6 12 8 11 13 6 1 0 2 3 2 6 70 1996 14 15 21 15 12 5 2 1 0 4 4 6 99 1997 8 3 13 6 8 8 1 0 0 6 14 12 79 1998 12 11 12 9 13 3 5 5 5 4 4 5 88 1999 11 7 10 8 3 1 5 1 1 5 6 7 65 2000 11 9 9 4 5 1 4 0 6 10 12 12 83 2001 12 5 7 2 9 2 4 4 3 10 11 14 83 2002 12 9 9 19 3 0 6 0 0 3 13 17 91 2003 9 14 12 15 9 1 0 2 0 8 7 16 93 MEAN 12.0 10.9 12.7 10.1 8.7 3.4 3.1 1.2 1.4 6.2 8.1 10.7 88.5 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 31 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M NO. OF DAYS WITH THUNDER STORM YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 0 2 2 9 4 5 8 2 2 0 3 1 38 1989 0 0 6 2 5 0 2 0 0 4 3 2 24 1990 1 2 1 3 2 0 1 0 0 1 0 0 11 1991 1 0 5 4 3 3 0 0 0 4 2 3 25 1992 0 0 1 2 7 9 0 0 0 0 0 0 19 1993 0 2 3 1 2 2 2 0 0 1 1 1 15 1994 1 0 0 4 3 2 0 0 0 1 1 0 12 1995 0 0 0 2 5 2 0 0 2 0 0 0 11 1996 0 1 1 4 3 3 1 1 0 1 1 0 16 1997 0 0 0 0 1 7 2 0 0 2 0 0 12 1998 0 0 1 3 7 2 2 1 3 0 0 1 20 1999 1 0 1 2 0 0 2 0 0 0 1 0 7 2000 1 1 0 1 2 0 1 0 3 4 2 0 15 2001 0 0 1 1 3 1 1 5 2 5 1 1 21 2002 0 0 2 9 5 0 3 0 0 0 0 3 22 2003 0 1 3 6 5 0 0 2 0 2 0 0 19 MEAN 0.3 0.6 1.7 3.3 3.6 2.2 1.6 0.7 0.8 1.6 0.9 0.8 18.1 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 32 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M NO. OF DAYS WITH SNOW OR SLEET YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 15 10 0 0 0 0 0 0 0 0 0 4 29 1989 13 9 1 0 0 0 0 0 0 0 0 1 24 1990 16 12 4 0 0 0 0 0 0 0 0 5 37 1991 11 9 4 0 0 0 0 0 0 0 0 8 32 1992 14 9 5 0 0 0 0 0 0 0 1 7 36 1993 10 9 5 0 0 0 0 0 0 0 3 5 32 1994 5 6 0 0 0 0 0 0 0 0 0 5 16 1995 0 5 0 0 0 0 0 0 0 0 0 7 12 1996 9 9 9 0 0 0 0 0 0 0 1 0 28 1997 4 0 3 0 0 0 0 0 0 0 0 7 14 1998 12 8 4 1 1 0 0 0 0 0 0 2 28 1999 6 2 1 0 0 0 0 0 0 0 2 2 13 2000 6 6 2 0 0 0 0 0 0 0 1 3 18 2001 9 1 1 0 0 0 0 0 0 0 0 1 12 2002 7 3 0 0 0 0 0 0 0 0 2 11 23 2003 6 8 2 0 0 0 0 0 0 0 1 8 25 MEAN 8.9 6.6 2.6 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.7 4.7 23.7 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 33 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M NO. OF DAYS WITH DUST YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 0 0 0 0 0 0 0 0 0 0 0 0 0 1989 0 0 0 0 1 0 0 0 0 0 0 0 1 1990 0 0 0 0 1 1 0 0 0 0 0 0 2 1991 0 0 0 2 2 0 0 0 0 0 0 0 4 1992 0 0 1 1 0 0 0 0 0 0 0 0 2 1993 0 1 0 0 0 0 0 0 0 0 0 0 1 1994 0 1 0 0 0 1 0 0 0 0 0 0 2 1995 1 0 0 0 0 0 0 0 1 0 0 1 3 1996 0 0 0 0 0 0 0 0 2 0 0 1 3 1997 1 0 2 1 0 0 0 0 0 0 0 1 5 1998 1 0 0 0 1 0 0 0 0 0 0 0 2 1999 1 0 0 0 2 0 0 1 0 0 1 0 5 2000 0 0 1 0 6 0 0 0 0 0 0 2 9 2001 0 0 0 0 0 0 0 0 0 0 0 0 0 2002 0 0 0 0 0 0 1 0 0 0 0 0 1 2003 0 0 0 0 1 0 0 1 0 0 0 0 2 MEAN 0.3 0.1 0.3 0.3 0.9 0.1 0.1 0.1 0.2 0.0 0.1 0.3 2.8 =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 34 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M PREVAILING WIND DIRECTION , SPEED (IN KNOTS) AND PERCENT YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 360 360 360 360 225 180 180 180 360 360 360 360 360 PREVAIL. DIRECT. 4.2 4.5 4.6 5.0 7.4 5.7 4.9 4.9 4.2 4.0 4.3 4.1 4.5 PREVAIL. SPEED 8.1 24.1 22.2 18.8 15.3 12.9 11.3 10.1 14.6 16.5 13.8 14.9 14.7 PREVAIL. PERCENT 66.5 42.7 36.3 42.5 37.1 37.9 48.8 59.3 53.8 56.5 60.8 65.3 50.7 CALMS PERCENT 248 232 248 240 248 240 248 248 240 248 240 248 2928 WIND OBSER. NO. 1989 360 360 360 360 360 360 360 360 225 225 225 360 360 PREVAIL. DIRECT. 4.1 4.4 4.4 5.3 4.9 4.5 4.3 3.9 3.9 5.7 7.1 3.6 4.4 PREVAIL. SPEED 9.7 7.6 16.1 21.7 17.7 14.6 13.7 10.9 7.5 9.3 8.3 8.1 11.4 PREVAIL. PERCENT 73.0 71.0 49.6 33.3 39.9 42.9 47.6 59.3 73.3 71.4 71.7 73.4 58.8 CALMS PERCENT 248 224 248 240 248 240 248 248 240 248 240 248 2920 WIND OBSER. NO. 1990 180 360 360 270 225 225 180 180 180 225 270 225 180 PREVAIL. DIRECT. 4.2 4.2 5.0 8.7 7.0 5.3 4.9 4.6 4.7 6.7 4.0 6.0 5.5 PREVAIL. SPEED 3.6 8.5 8.5 10.0 10.9 10.0 6.5 10.5 8.8 7.3 2.1 2.4 6.2 PREVAIL. PERCENT 83.5 77.2 60.9 50.8 58.5 59.2 74.5 66.1 69.6 75.0 91.7 95.2 71.8 CALMS PERCENT 248 224 248 240 248 240 247 248 240 248 240 248 2919 WIND OBSER. NO. 1991 360 225 180 225 270 270 270 225 225 180 225 45 225 PREVAIL. DIRECT. 4.8 4.5 4.8 7.9 8.6 4.7 6.0 4.7 5.9 4.8 5.1 4.8 6.3 PREVAIL. SPEED 2.0 1.8 2.0 5.0 10.5 4.6 2.4 4.4 6.3 4.0 2.9 2.0 3.3 PREVAIL. PERCENT 91.5 93.3 92.3 82.1 71.0 84.6 92.3 86.7 81.3 85.9 91.3 94.0 87.2 CALMS PERCENT 248 224 248 240 248 240 248 248 240 248 240 248 2920 WIND OBSER. NO. 1992 45 270 270 225 225 225 225 225 225 45 45 45 45 PREVAIL. DIRECT. 4.4 7.4 5.1 5.6 7.5 5.2 6.8 5.0 4.9 4.2 4.0 4.2 4.7 PREVAIL. SPEED 4.0 3.0 2.8 3.8 3.2 5.0 3.2 5.6 6.3 6.9 5.8 4.0 3.0 PREVAIL. PERCENT 91.5 90.5 93.1 82.1 88.3 81.7 92.3 89.1 78.3 79.0 85.4 87.1 86.6 CALMS PERCENT 248 232 248 240 248 240 248 248 240 248 240 248 2928 WIND OBSER. NO. 1993 45 45 45 270 270 180 180 180 180 180 180 135 180 PREVAIL. DIRECT. 4.0 4.0 5.2 5.5 6.9 4.7 4.2 4.8 4.4 6.0 5.3 4.0 4.7 PREVAIL. SPEED 1.6 3.1 4.8 6.3 6.0 5.0 3.6 3.2 6.7 3.2 1.3 0.4 3.3 PREVAIL. PERCENT 94.8 91.5 82.3 73.8 78.6 80.8 84.3 90.3 87.5 93.1 95.3 99.2 87.6 CALMS PERCENT 248 224 248 240 248 240 248 247 240 248 235 247 2913 WIND OBSER. NO. 1994 180 180 180 270 270 225 180 225 225 225 225 180 225 PREVAIL. DIRECT. 8.0 5.5 4.6 9.0 7.3 5.8 7.0 5.5 6.3 7.4 5.4 4.7 6.6 PREVAIL. SPEED 0.8 1.8 2.8 4.2 7.7 7.5 2.4 3.2 9.6 5.6 2.9 4.4 3.6 PREVAIL. PERCENT 97.6 93.8 91.1 89.2 81.5 81.7 90.7 91.5 69.2 76.6 90.4 81.5 86.2 CALMS PERCENT 247 224 248 240 248 240 248 248 240 248 240 248 2919 WIND OBSER. NO. 1995 225 45 270 180 225 225 180 225 180 45 45 45 225 PREVAIL. DIRECT. 5.3 5.1 7.5 7.2 6.3 6.3 5.6 6.5 5.8 4.2 4.7 4.4 6.3 PREVAIL. SPEED 6.0 6.7 9.7 7.1 10.5 7.9 6.0 12.1 10.4 10.9 10.0 7.3 7.8 PREVAIL. PERCENT 80.2 73.7 66.9 75.4 62.1 70.0 71.4 51.6 58.3 56.5 57.9 73.8 66.4 CALMS PERCENT 248 224 248 240 248 240 248 248 240 248 240 248 2920 WIND OBSER. NO. 1996 45 180 360 270 225 225 225 225 360 225 180 180 225 PREVAIL. DIRECT. 4.8 6.1 5.5 8.0 7.2 6.3 5.8 5.9 5.3 6.9 6.6 5.3 6.4 PREVAIL. SPEED 8.5 7.8 6.5 8.3 6.9 10.0 10.5 10.5 9.2 8.1 8.8 4.4 6.9 PREVAIL. PERCENT 63.7 68.1 75.8 62.5 66.5 63.3 68.1 59.7 59.6 63.3 73.3 79.0 66.9 CALMS PERCENT 248 232 248 240 248 240 248 248 240 248 240 248 2928 WIND OBSER. NO. 1997 180 180 225 225 225 225 180 225 180 225 180 180 225 PREVAIL. DIRECT. 6.3 6.7 6.7 7.3 7.1 7.1 6.5 6.2 6.4 7.9 6.1 5.4 6.9 PREVAIL. SPEED 5.6 12.5 8.5 12.9 10.9 14.6 9.7 12.5 10.4 10.5 6.3 4.0 8.6 PREVAIL. PERCENT 76.6 66.5 66.1 52.5 58.9 45.0 60.1 62.1 57.1 60.9 82.5 81.5 64.2 CALMS PERCENT 248 224 248 240 248 240 248 248 240 248 240 248 2920 WIND OBSER. NO. 1998 180 360 225 225 270 180 180 225 225 225 360 360 225 PREVAIL. DIRECT. 4.8 6.2 7.8 8.0 9.1 6.5 6.0 7.0 5.4 6.3 6.1 6.0 6.6 PREVAIL. SPEED 3.2 4.0 8.9 10.0 12.5 9.2 8.9 10.1 10.0 9.3 7.9 6.9 7.2 PREVAIL. PERCENT 81.9 78.1 70.6 57.9 55.6 63.3 69.8 67.7 57.1 64.1 71.3 84.3 68.5 CALMS PERCENT 248 224 248 240 248 240 248 248 240 248 240 248 2920 WIND OBSER. NO. 1999 180 180 180 225 225 225 225 360 225 180 180 45 225 PREVAIL. DIRECT. 5.9 6.3 5.9 6.7 7.0 7.0 6.3 7.4 6.8 6.3 5.6 4.3 6.5 PREVAIL. SPEED 5.6 13.4 9.7 14.2 14.1 15.0 11.3 12.5 11.7 9.7 8.3 7.3 9.5 PREVAIL. PERCENT 83.5 55.4 62.5 52.9 55.2 51.3 62.9 56.5 58.3 59.3 66.7 80.2 62.2 CALMS PERCENT 248 224 248 240 248 240 248 248 240 248 240 248 2920 WIND OBSER. NO. 2000 180 225 270 225 225 180 180 225 180 360 180 180 225 PREVAIL. DIRECT. 5.0 7.4 8.0 8.7 7.3 6.4 5.8 6.2 5.4 5.3 5.6 5.7 6.9 PREVAIL. SPEED 5.6 7.3 8.5 12.5 13.7 12.9 11.7 11.7 10.0 7.7 3.8 5.6 8.1 PREVAIL. PERCENT 72.2 67.7 57.3 50.0 43.1 52.5 57.7 64.9 67.9 70.2 84.2 82.7 64.2 CALMS PERCENT 248 232 248 240 248 240 248 248 240 248 240 248 2928 WIND OBSER. NO. 2001 360 180 180 360 270 225 180 225 225 225 45 180 225 PREVAIL. DIRECT. 4.5 5.9 5.5 5.6 7.3 6.3 5.4 7.2 6.1 6.9 4.2 5.5 6.6 PREVAIL. SPEED 9.3 8.5 10.1 12.5 12.9 12.5 11.7 7.7 9.6 10.9 10.4 4.4 8.2 PREVAIL. PERCENT 75.4 67.0 58.9 52.1 47.2 62.9 58.9 62.1 60.0 52.4 70.0 85.5 62.7 CALMS PERCENT 248 224 248 240 248 240 248 248 240 248 240 248 2920 WIND OBSER. NO. 2002 180 180 270 180 225 270 225 45 180 45 45 180 225 PREVAIL. DIRECT. 5.0 5.6 7.2 6.4 7.9 6.5 6.0 4.3 5.8 4.1 4.1 5.4 6.6 PREVAIL. SPEED 5.6 8.5 6.9 8.8 16.9 12.9 13.7 8.9 11.7 14.9 10.8 8.9 8.7 PREVAIL. PERCENT 75.8 61.2 63.3 58.8 50.8 48.3 55.2 67.7 61.3 55.2 64.6 77.8 61.7 CALMS PERCENT 248 224 248 240 248 240 248 248 240 248 240 248 2920 WIND OBSER. NO. 2003 45 270 180 225 180 180 45 45 180 45 180 180 180 PREVAIL. DIRECT. 4.0 7.9 5.2 6.5 6.8 6.1 4.2 4.1 5.5 4.1 4.9 5.3 5.7 PREVAIL. SPEED 7.3 7.6 12.5 8.3 14.9 9.6 11.7 8.9 11.3 12.9 7.1 6.5 8.5 PREVAIL. PERCENT 73.0 63.4 48.8 63.3 52.8 68.3 62.1 63.7 62.9 56.0 73.3 77.4 63.7 CALMS PERCENT 248 224 248 240 248 240 248 248 240 248 240 248 2920 WIND OBSER. NO. 1988-2003 180 180 180 225 225 225 225 225 225 225 180 180 225 PREVAIL. DIRECT. 5.1 5.9 5.8 7.1 7.0 6.2 5.8 5.8 6.0 6.5 5.5 5.1 6.3 PREVAIL. SPEED 4.2 6.0 6.4 8.2 10.3 9.2 7.8 8.1 8.3 7.7 4.9 4.2 6.7 PREVAIL. PERCENT MEAN 80.0 72.5 67.2 61.2 59.2 62.1 68.5 68.6 66.0 67.2 76.9 82.4 69.3 CALMS PERCENT MEAN 247.9 226.0 248.0 240.0 248.0 240.0 247.9 247.9 240.0 248.0 239.7 247.9 2921.3 WIND OBSER. NO. =============================================================================================== TEHRAN 2002,MAY M.(S & A) STATION SHOMALE TEHRAN (40751) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 35 LATITUDE 35 47 N LONGITUDE 51 37 E DATA PROCESSING CENTER ELEVATION 1548.2 M VECTOR WIND DIRECTION , MAGNITUDE (IN KNOTS) AND WIND STEADINESES (%) YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1988 65 7 280 336 233 233 224 226 217 238 305 327 251 VECTOR DIRECT. 0.3 0.7 0.5 0.2 1.7 0.7 0.5 0.6 0.5 0.4 0.3 0.2 0.3 WIND MAGNITUDE 18.8 25.0 14.3 6.7 45.9 20.6 20.0 31.6 21.7 20.0 15.8 12.5 12.0 STEADINESES(%) 1989 108 117 302 279 253 230 252 227 212 230 236 72 239 VECTOR DIRECT. 0.2 0.4 0.2 0.5 1.0 0.6 0.8 0.4 0.3 0.6 0.8 R< 0.1 0.4 WIND MAGNITUDE 16.7 30.8 8.0 13.9 30.3 20.7 33.3 23.5 33.3 40.0 50.0 2.1 20.0 STEADINESES(%) 1990 150 170 247 234 224 224 210 207 223 253 274 263 226 VECTOR DIRECT. 0.2 0.2 0.4 1.3 1.2 0.7 0.5 0.4 0.3 0.4 0