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