STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** 6.7 12.2 17.7 26.5 30.2 33.0 31.5 26.8 20.2 14.6 8.2 ***** MINIMUN AIR TEMPERATURE (C) ***** 0.6 5.9 9.8 17.6 21.4 24.5 22.5 18.2 13.0 8.1 1.7 ***** DAYS WITH MINIMUM TEMP. >=21 **** 0 0 0 5 20 31 27 7 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 **** 1 0 0 0 0 0 0 0 0 0 1 **** DAYS WITH FREEZING MIN.<= 0 **** 15 4 0 0 0 0 0 0 0 0 11 **** TEMPERATURE RECORDS LOWEST(C) ***** -4.0 -1.0 2.0 9.0 16.0 21.0 17.0 14.0 5.0 5.0 -5.0 ***** DAY ** 25 16 7 5 7 3 29 24 27 24 23 MAXIMUM AIR TEMPERATURE (C) ***** 11.2 16.7 22.4 31.5 35.1 37.8 36.9 32.0 24.8 19.1 12.8 ***** DAYS WITH MAXIMUM TEMP. >=30 **** 0 0 4 25 29 31 31 23 3 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 **** 0 0 0 0 0 0 0 0 0 0 0 **** TEMPERATURE RECORDS HIGHEST(C)***** 17.0 25.0 31.0 37.0 37.0 41.0 39.0 38.0 31.0 23.0 18.0 ***** DAY ** 28 11 27 18 16 13 4 1 15 4 17 DIF. BETWEEN (MAX.-MIN.) (C) ***** 10.6 10.8 12.6 13.9 13.7 13.3 14.4 13.8 11.8 11.0 11.1 ***** MEAN DAILY TEMP. (MDT) (C) ***** 5.9 11.3 16.1 24.5 28.2 31.1 29.7 25.1 18.9 13.6 7.2 ***** COOLING DEG. DAYS(BASE 21 0C)****** 0.0 0.0 11.5 121.5 217.5 313.5 269.5 124.5 13.5 0.0 0.0 ****** HEATING DEG. DAYS(BASE 18 0C)****** 338.0 208.0 88.5 3.5 0.0 0.0 0.0 0.0 35.0 132.0 333.5 ****** DEWPOINT (MEAN C) ***** -4.8 -0.9 -1.5 2.4 5.8 8.2 6.6 5.0 5.6 0.6 -3.0 ***** MIXING RATIO (G/KG) ****** 3.18 4.34 4.03 5.29 6.71 7.86 7.10 6.32 6.72 4.59 3.53 ****** VAPOUR PRESSURE (HPA) ****** 4.50 6.14 5.69 7.46 9.42 10.99 9.97 8.93 9.48 6.52 5.02 ****** SATURATION DEF. (HPA) ****** 5.67 8.74 15.92 28.73 34.64 40.56 37.77 27.78 15.24 10.64 6.33 ****** RELATIVE HUMIDITY (MEAN %) *** 47 44 29 23 23 23 23 27 42 40 47 *** RELATIVE HUMIDITY (MAX. %) *** 64 62 43 37 37 34 33 40 60 54 58 *** RELATIVE HUMIDITY (MIN. %) *** 35 33 21 16 16 17 16 19 30 30 38 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** 63 60 43 37 37 34 33 40 59 53 56 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** 42 37 23 18 18 18 18 21 33 32 40 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** 43 40 27 19 21 20 22 26 41 43 51 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.0 19.0 13.7 0.0 3.4 7.0 0.6 0.0 3.0 21.2 0.0 3.0 70.9 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 1 0 0 2 DAYS WITH PRECIPITATION >= 5 0 1 2 0 0 0 0 0 0 1 0 0 4 DAYS WITH PRECIPITATION >= 1 0 3 3 0 2 3 0 0 2 5 0 2 20 DAYS WITH PRECIPITATION 0 3 10 3 7 5 4 4 5 8 2 4 55 GREATEST DAILY PRECIPITATION 0.0 15.0 7.0 0.0 1.2 3.0 0.3 0.0 2.0 12.0 0.0 2.0 15.0 DAY ** 14 3 ** 30 13 1 ** 6 1 ** 21 DAY WITH THUNDER STORM 0 0 0 1 0 1 1 1 0 1 0 0 5 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 0 1 2 2 2 1 0 0 0 1 0 0 9 WIND DIRECTION (PREVAILING) *** 135 180 225 225 180 135 315 180 180 180 315 *** PREVAILING WIND SPEED(KNOTS) **** 5.6 5.9 10.1 8.7 8.0 7.5 6.8 7.7 8.5 6.7 5.1 **** PREVAILING WIND PERCENT ***** 7.9 20.0 24.0 17.4 21.3 13.5 10.3 22.7 16.1 9.3 9.7 ***** CALMS PERCENT OF WIND ***** 68.6 47.1 33.3 36.8 30.7 38.1 41.3 42.0 52.3 68.0 75.5 ***** NO. OF WIND OBSERVATION 22 140 155 150 155 150 155 155 150 155 150 155 1692 VECTOR WIND DIRECTION (MEAN) *** 215 183 223 220 134 74 334 177 208 210 256 *** VECTOR WIND MAGNITUDE(KNOTS) **** 0.9 1.3 3.9 1.7 1.2 1.5 0.4 1.8 3.1 1.1 0.7 **** WIND STEADINESES (MEAN %) ***** 42.9 39.4 66.1 32.1 21.4 31.3 8.9 39.1 70.5 50.0 43.8 ***** WIND SPEED (MEAN KNOTS) **** 2.1 3.3 5.9 5.3 5.6 4.8 4.5 4.6 4.4 2.2 1.6 **** FASTEST WIND DIRECTION *** 270 280 210 360 180 90 30 330 210 220 210 *** FASTEST WIND SPEED (KNOTS) *** 25 20 20 20 16 15 18 15 25 15 16 *** DAY ** 23 12 4 29 2 2 27 6 10 18 18 DAYS WITH SKY CLEAR (0-2)/8 0 13 9 12 15 22 23 27 23 12 17 21 194 DAYS WITH P.CLOUDY (3-6)/8 1 13 16 12 12 7 8 4 7 17 11 8 116 DAYS WITH CLOUDY (7-8)/8 4 2 6 6 4 1 0 0 0 2 2 2 29 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 0 0 DURATION OF SUNSHINE HOURS ****** ****** ****** 248.1 278.9 319.2 336.7 328.2 280.6 255.1 232.2 230.6 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. 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QNH PRESSURE IN HPA ****** 1000.0 1005.2 1000.5 1005.5 1003.7 998.8 1008.0 1010.5 1001.8 1010.4 1010.8 ****** DAY-HOUR **-** 9-12 23-15 4- 3 3-15 17-15 11-15 1-12 21-15 25-12 9-15 20-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA ****** 885.2 887.1 883.1 885.9 883.4 881.7 885.5 887.7 888.4 889.9 889.0 ****** MAX. QFE PRESSURE IN HPA ****** 893.6 895.1 889.3 895.0 889.7 886.7 890.3 891.4 895.0 893.9 893.8 ****** DAY ** 1 16 25 21 4 16 9 30 5 25 4 MIN. QFE PRESSURE IN HPA ****** 874.0 878.5 873.4 881.0 877.4 874.7 881.3 883.7 876.2 884.7 883.8 ****** DAY ** 23 24 4 3 18 12 1 22 25 9 18 MEAN QNH PRESSURE IN HPA ****** 1013.7 1015.7 1011.3 1014.5 1011.7 1009.8 1014.0 1016.4 1017.2 1018.9 1017.9 ****** MAX. QNH PRESSURE IN HPA ****** 1023.0 1024.7 1018.2 1024.6 1018.7 1015.3 1019.4 1020.6 1024.6 1023.4 1023.3 ****** DAY ** 1 16 25 21 4 16 9 30 5 25 4 MIN. QNH PRESSURE IN HPA ****** 1001.2 1006.2 1000.5 1009.0 1005.0 1001.9 1009.3 1012.0 1003.6 1013.1 1012.1 ****** DAY ** 23 24 4 3 18 12 1 22 25 9 18 MEAN QFF PRESSURE IN HPA ****** 1015.1 1014.6 1007.7 1007.0 1002.5 999.2 1004.4 1008.9 1012.5 1017.0 1019.1 ****** MAX. QFF PRESSURE IN HPA ****** 1025.7 1027.1 1015.4 1017.9 1009.6 1005.0 1011.3 1014.5 1021.2 1022.9 1026.1 ****** DAY ** 1 16 10 21 3 16 9 30 29 25 22 MIN. QFF PRESSURE IN HPA ****** 1001.7 1003.9 996.8 1000.7 995.2 990.9 998.9 1003.8 999.3 1009.5 1011.3 ****** DAY ** 23 13 4 12 18 12 1 22 25 9 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA ****** 886.2 887.6 883.3 885.6 883.2 881.3 885.5 887.7 888.4 890.2 889.4 ****** MAX. QFE PRESSURE IN HPA ****** 894.5 896.1 889.0 894.1 888.8 885.9 890.4 891.9 894.7 894.2 894.0 ****** DAY ** 1 16 25 21 3 16 9 20 5 28 4 MIN. QFE PRESSURE IN HPA ****** 875.3 879.0 875.1 880.1 878.0 875.4 881.8 885.0 875.4 884.5 883.5 ****** DAY ** 23 24 4 3 18 12 1 12 25 9 20 MEAN QNH PRESSURE IN HPA ****** 1014.8 1016.4 1011.5 1014.1 1011.4 1009.4 1014.0 1016.5 1017.2 1019.3 1018.3 ****** MAX. QNH PRESSURE IN HPA ****** 1024.0 1025.8 1017.9 1023.6 1017.7 1014.4 1019.5 1021.1 1024.3 1023.7 1023.5 ****** DAY ** 1 16 25 21 3 16 9 20 5 28 4 MIN. QNH PRESSURE IN HPA ****** 1002.6 1006.7 1002.4 1008.0 1005.6 1002.7 1009.9 1013.4 1002.7 1012.9 1011.8 ****** DAY ** 23 24 4 3 18 12 1 12 25 9 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA ****** 884.6 885.9 881.7 884.0 881.7 879.8 883.9 886.2 887.0 888.9 888.4 ****** MAX. QFE PRESSURE IN HPA ****** 892.6 893.9 887.7 892.3 887.4 885.0 888.4 889.8 892.5 893.0 893.3 ****** DAY ** 1 16 9 21 3 16 9 20 5 28 22 MIN. QFE PRESSURE IN HPA ****** 873.0 877.7 874.7 878.0 876.8 873.0 880.1 882.9 874.6 882.6 882.6 ****** DAY ** 9 23 4 3 17 11 1 21 25 9 20 MEAN QNH PRESSURE IN HPA ****** 1013.0 1014.4 1009.8 1012.4 1009.8 1007.6 1012.2 1014.8 1015.6 1017.8 1017.3 ****** MAX. QNH PRESSURE IN HPA ****** 1021.9 1023.4 1016.5 1021.6 1016.1 1013.4 1017.2 1018.8 1021.8 1022.4 1022.7 ****** DAY ** 1 16 9 21 3 16 9 20 5 28 22 MIN. QNH PRESSURE IN HPA ****** 1000.0 1005.3 1001.9 1005.6 1004.3 1000.0 1008.0 1011.1 1001.8 1010.8 1010.8 ****** DAY ** 9 23 4 3 17 11 1 21 25 9 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** 884.7 886.0 881.7 883.7 881.2 879.3 883.6 886.1 887.1 889.1 888.8 ****** MAX. QFE PRESSURE IN HPA ****** 892.7 893.9 887.7 891.8 887.0 884.4 887.8 889.4 893.2 893.0 893.7 ****** DAY ** 1 16 9 20 2 15 9 30 29 28 22 MIN. QFE PRESSURE IN HPA ****** 874.3 877.6 874.9 877.9 876.3 871.9 880.5 882.4 875.2 882.3 883.1 ****** DAY ** 9 23 4 3 17 11 3 21 25 9 17 MEAN QNH PRESSURE IN HPA ****** 1013.1 1014.5 1009.7 1012.0 1009.2 1007.0 1011.8 1014.6 1015.8 1018.0 1017.6 ****** MAX. QNH PRESSURE IN HPA ****** 1022.0 1023.4 1016.5 1021.0 1015.7 1012.8 1016.6 1018.4 1022.6 1022.4 1023.2 ****** DAY ** 1 16 9 20 2 15 9 30 29 28 22 MIN. QNH PRESSURE IN HPA ****** 1001.5 1005.2 1002.2 1005.5 1003.7 998.8 1008.4 1010.5 1002.5 1010.4 1011.3 ****** DAY ** 9 23 4 3 17 11 3 21 25 9 17 MEAN QFF PRESSURE IN HPA ****** 1014.4 1013.3 1006.1 1004.5 1000.0 996.5 1002.1 1007.2 1011.1 1016.1 1018.8 ****** MAX. QFF PRESSURE IN HPA ****** 1024.4 1025.8 1015.2 1013.9 1006.9 1002.6 1007.8 1013.2 1021.0 1022.1 1027.0 ****** DAY ** 1 16 9 20 2 16 9 30 29 28 22 MIN. QFF PRESSURE IN HPA ****** 1001.3 1002.9 998.6 999.8 993.8 987.9 998.0 1002.3 998.3 1007.3 1010.2 ****** DAY ** 9 23 19 3 17 11 3 21 25 9 17 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 10.0 11.5 13.0 18.7 24.7 32.2 32.7 32.5 27.9 19.1 14.1 8.4 20.4 MINIMUN AIR TEMPERATURE (C) 3.7 4.3 5.7 11.0 15.7 22.5 24.0 23.1 18.9 11.9 6.3 1.7 12.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 27 29 29 7 0 0 0 93 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 3 1 1 0 0 0 0 0 0 0 0 9 14 TEMPERATURE RECORDS LOWEST(C) -2.0 0.0 -1.0 5.0 10.0 17.0 20.0 19.0 14.0 7.0 1.0 -3.0 -3.0 DAY 15 6 3 1 10 1 2 16 4 18 26 30 MAXIMUM AIR TEMPERATURE (C) 14.5 16.0 18.1 23.5 29.5 36.8 37.8 37.5 32.8 23.8 19.0 13.3 25.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 19 30 31 31 30 1 0 0 144 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 21.0 27.0 31.0 34.0 40.0 43.0 40.0 37.0 30.0 25.0 17.0 43.0 DAY 26 26 12 21 24 13 25 31 1 1 1 18 DIF. BETWEEN (MAX.-MIN.) (C) 10.8 11.7 12.4 12.5 13.8 14.3 13.8 14.4 13.9 11.9 12.7 11.6 12.8 MEAN DAILY TEMP. (MDT) (C) 9.1 10.2 11.9 17.3 22.6 29.6 30.9 30.3 25.8 17.8 12.6 7.5 18.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 7.0 68.0 258.5 306.0 288.0 145.0 6.5 0.0 0.0 1079.0 HEATING DEG. DAYS(BASE 18 0C) 275.0 219.5 191.0 54.0 1.0 0.0 0.0 0.0 0.0 37.5 161.5 324.5 1264.0 DEWPOINT (MEAN C) -1.1 -1.6 -1.9 0.7 4.1 3.9 8.0 8.4 3.5 6.8 1.4 -1.8 2.5 MIXING RATIO (G/KG) 4.07 3.95 3.94 4.71 6.02 5.92 7.88 8.22 5.74 7.09 4.92 3.82 5.52 VAPOUR PRESSURE (HPA) 5.78 5.58 5.56 6.64 8.48 8.31 11.01 11.49 8.09 10.03 7.02 5.42 7.78 SATURATION DEF. (HPA) 6.89 8.48 10.19 15.91 23.92 41.21 39.83 38.96 30.84 12.90 9.75 5.91 20.40 RELATIVE HUMIDITY (MEAN %) 48 43 39 33 30 18 23 24 23 48 43 50 35 RELATIVE HUMIDITY (MAX. %) 60 58 56 48 46 30 34 37 35 65 53 63 49 RELATIVE HUMIDITY (MIN. %) 38 32 27 23 20 12 17 18 15 36 35 41 26 RELATIVE HUMIDITY (MEAN% 03UTC) 57 58 56 47 46 30 34 36 35 64 52 62 48 RELATIVE HUMIDITY (MEAN% 09UTC) 43 37 33 28 25 14 19 19 18 39 36 42 29 RELATIVE HUMIDITY (MEAN% 15UTC) 48 38 32 30 26 15 21 22 20 47 46 50 33 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 7.1 15.5 28.3 9.6 9.3 0.0 0.0 0.0 0.0 14.1 0.0 3.0 86.9 DAYS WITH PRECIPITATION >=10 0 1 1 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 1 1 1 0 1 0 0 0 0 1 0 0 5 DAYS WITH PRECIPITATION >= 1 2 2 4 4 3 0 0 0 0 4 0 2 21 DAYS WITH PRECIPITATION 4 6 6 10 9 0 4 1 0 9 0 3 52 GREATEST DAILY PRECIPITATION 5.0 14.0 21.0 3.4 5.1 0.0 0.0 0.0 0.0 7.0 0.0 2.0 21.0 DAY 13 2 1 14 6 ** ** ** ** 26 ** 21 DAY WITH THUNDER STORM 0 0 0 1 3 0 0 0 0 1 0 0 5 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 2 0 3 5 6 2 0 0 1 0 0 0 19 WIND DIRECTION (PREVAILING) 315 180 180 180 180 180 45 180 225 180 180 315 180 PREVAILING WIND SPEED(KNOTS) 5.4 7.1 8.8 9.0 8.5 8.6 8.9 6.9 10.0 6.5 5.6 5.1 7.4 PREVAILING WIND PERCENT 11.6 11.4 14.8 14.0 20.6 13.3 23.9 19.4 12.7 7.1 18.0 10.3 12.3 CALMS PERCENT OF WIND 77.4 65.0 52.3 50.0 47.7 46.7 38.7 49.0 64.7 71.0 64.0 78.7 58.7 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 282 213 213 230 214 168 49 206 227 266 233 251 216 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.9 1.9 2.2 3.2 1.8 1.6 0.8 1.3 0.3 0.5 0.5 0.9 WIND STEADINESES (MEAN %) 46.2 37.5 44.2 44.9 60.4 36.7 32.7 21.6 38.2 14.3 23.8 41.7 26.5 WIND SPEED (MEAN KNOTS) 1.3 2.4 4.3 4.9 5.3 4.9 4.9 3.7 3.4 2.1 2.1 1.2 3.4 FASTEST WIND DIRECTION 210 210 220 270 210 220 330 30 220 180 160 240 270 FASTEST WIND SPEED (KNOTS) 15 15 25 32 28 25 18 16 25 12 10 12 32 DAY 28 3 20 22 17 14 26 26 24 2 2 21 DAYS WITH SKY CLEAR (0-2)/8 14 12 17 7 6 26 23 30 25 12 25 20 217 DAYS WITH P.CLOUDY (3-6)/8 10 13 9 15 20 4 8 1 5 15 5 9 114 DAYS WITH CLOUDY (7-8)/8 7 3 5 8 5 0 0 0 0 4 0 2 34 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 1 1 DURATION OF SUNSHINE HOURS 188.8 187.9 231.6 191.5 251.2 353.2 347.2 344.9 289.6 226.0 264.6 208.4 3084.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 889.7 885.9 884.6 884.4 885.8 881.9 880.8 882.0 885.7 889.9 895.2 888.2 886.2 MAX. QFE PRESSURE IN HPA 898.0 893.5 894.5 893.9 891.9 890.0 886.7 887.6 890.6 896.5 902.3 897.1 902.3 DAY-HOUR 1- 6 12- 6 3- 6 5- 6 10- 6 7- 6 11- 6 16- 6 16- 6 18- 6 23- 6 23- 6 MIN. QFE PRESSURE IN HPA 882.6 877.0 867.8 876.4 880.3 874.7 874.2 876.2 879.6 881.8 888.3 878.5 867.8 DAY-HOUR 27-12 2-12 20- 3 13-12 26-12 26-15 17-15 5-12 8-15 15-15 30-12 12-12 MEAN QNH PRESSURE IN HPA 1018.6 1014.4 1013.0 1012.8 1014.4 1009.9 1008.7 1010.1 1014.2 1018.9 1024.8 1017.0 1014.7 MAX. QNH PRESSURE IN HPA 1027.9 1022.9 1024.0 1023.4 1021.1 1019.0 1015.3 1016.3 1019.7 1026.3 1032.7 1026.9 1032.7 DAY-HOUR 1- 6 12- 6 3- 6 5- 6 10- 6 7- 6 11- 6 16- 6 16- 6 18- 6 23- 6 23- 6 MIN. QNH PRESSURE IN HPA 1010.8 1004.5 994.2 1003.8 1008.2 1001.9 1001.4 1003.6 1007.4 1009.9 1017.1 1006.2 994.2 DAY-HOUR 27-12 2-12 20- 3 13-12 26-12 26-15 17-15 5-12 8-15 15-15 30-12 12-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 889.6 886.1 884.6 884.8 886.4 882.6 881.6 882.6 886.3 889.9 895.2 888.1 886.5 MAX. QFE PRESSURE IN HPA 896.7 891.7 893.7 892.5 890.9 889.6 886.4 886.8 890.0 895.6 901.2 895.8 901.2 DAY 1 12 3 27 10 7 12 16 16 18 23 7 MIN. QFE PRESSURE IN HPA 883.8 879.3 867.8 878.2 882.8 877.0 875.7 878.8 882.2 883.9 889.9 880.2 867.8 DAY 27 3 20 14 26 27 17 5 8 15 16 12 MEAN QNH PRESSURE IN HPA 1018.6 1014.6 1013.0 1013.2 1015.0 1010.7 1009.6 1010.7 1014.9 1019.0 1024.8 1016.9 1015.1 MAX. QNH PRESSURE IN HPA 1026.5 1020.9 1023.2 1021.8 1020.0 1018.6 1015.0 1015.4 1019.0 1025.3 1031.5 1025.5 1031.5 DAY 1 12 3 27 10 7 12 16 16 18 23 7 MIN. QNH PRESSURE IN HPA 1012.1 1007.1 994.2 1005.8 1011.0 1004.5 1003.1 1006.5 1010.3 1012.2 1018.9 1008.1 994.2 DAY 27 3 20 14 26 27 17 5 8 15 16 12 MEAN QFF PRESSURE IN HPA 1018.5 1013.8 1011.3 1009.1 1008.2 1000.8 999.3 1000.5 1006.8 1014.6 1023.5 1017.7 1010.3 MAX. QFF PRESSURE IN HPA 1027.3 1020.5 1025.5 1021.0 1016.5 1008.5 1004.4 1007.1 1011.8 1023.8 1031.2 1027.2 1031.2 DAY 1 12 3 5 10 7 12 16 22 18 23 30 MIN. QFF PRESSURE IN HPA 1009.5 1006.6 992.3 1001.7 1001.6 994.7 992.1 996.0 1000.4 1007.3 1017.8 1008.2 992.1 DAY 27 15 20 17 26 15 17 5 12 1 17 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 890.9 887.2 885.8 885.7 887.3 883.2 882.1 883.3 887.1 891.1 896.5 889.2 887.4 MAX. QFE PRESSURE IN HPA 898.0 893.5 894.5 893.9 891.9 890.0 886.7 887.6 890.6 896.5 902.3 897.1 902.3 DAY 1 12 3 5 10 7 11 16 16 18 23 23 MIN. QFE PRESSURE IN HPA 884.5 881.2 869.9 878.6 882.2 877.8 876.0 878.9 882.8 884.5 890.8 880.2 869.9 DAY 27 3 20 14 26 26 17 5 8 15 30 12 MEAN QNH PRESSURE IN HPA 1020.0 1015.9 1014.3 1014.2 1016.0 1011.4 1010.2 1011.5 1015.8 1020.3 1026.2 1018.1 1016.2 MAX. QNH PRESSURE IN HPA 1027.9 1022.9 1024.0 1023.4 1021.1 1019.0 1015.3 1016.3 1019.7 1026.3 1032.7 1026.9 1032.7 DAY 1 12 3 5 10 7 11 16 16 18 23 23 MIN. QNH PRESSURE IN HPA 1012.9 1009.2 996.6 1006.3 1010.3 1005.4 1003.4 1006.6 1011.0 1012.9 1019.9 1008.1 996.6 DAY 27 3 20 14 26 26 17 5 8 15 30 12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 890.1 886.4 885.2 884.8 886.2 882.3 881.2 882.5 886.2 890.3 895.4 888.6 886.6 MAX. QFE PRESSURE IN HPA 896.7 893.0 893.4 893.0 890.2 888.8 886.0 886.7 889.6 895.8 901.0 896.5 901.0 DAY 1 12 3 5 10 7 11 16 16 18 23 23 MIN. QFE PRESSURE IN HPA 883.5 879.6 870.1 878.8 881.4 876.8 875.5 877.3 881.6 883.6 889.5 879.5 870.1 DAY 27 2 20 13 26 26 17 5 8 15 30 12 MEAN QNH PRESSURE IN HPA 1019.1 1015.0 1013.7 1013.2 1014.8 1010.5 1009.2 1010.7 1014.8 1019.4 1025.1 1017.5 1015.2 MAX. QNH PRESSURE IN HPA 1026.5 1022.4 1022.8 1022.4 1019.2 1017.7 1014.6 1015.3 1018.6 1025.5 1031.3 1026.3 1031.3 DAY 1 12 3 5 10 7 11 16 16 18 23 23 MIN. QNH PRESSURE IN HPA 1011.8 1007.4 996.8 1006.5 1009.4 1004.3 1002.8 1004.8 1009.6 1011.9 1018.5 1007.3 996.8 DAY 27 2 20 13 26 26 17 5 8 15 30 12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 888.8 884.8 883.7 883.6 885.0 880.9 879.8 881.1 884.6 889.1 894.4 887.6 885.3 MAX. QFE PRESSURE IN HPA 894.1 891.8 891.7 891.7 890.3 887.3 884.7 884.9 888.2 893.9 899.5 895.6 899.5 DAY 1 12 3 5 9 6 11 16 22 9 22 7 MIN. QFE PRESSURE IN HPA 882.6 877.0 870.6 876.4 880.3 875.5 874.6 876.2 879.8 882.2 888.3 878.5 870.6 DAY 27 2 20 13 26 26 17 5 8 15 30 12 MEAN QNH PRESSURE IN HPA 1017.7 1013.3 1012.0 1011.8 1013.4 1008.9 1007.6 1009.1 1012.9 1018.0 1023.9 1016.4 1013.7 MAX. QNH PRESSURE IN HPA 1023.6 1021.0 1020.9 1020.9 1019.4 1016.0 1013.1 1013.3 1017.0 1023.4 1029.6 1025.3 1029.6 DAY 1 12 3 5 9 6 11 16 22 9 22 7 MIN. QNH PRESSURE IN HPA 1010.8 1004.5 997.4 1003.8 1008.2 1002.8 1001.8 1003.6 1007.6 1010.3 1017.1 1006.2 997.4 DAY 27 2 20 13 26 26 17 5 8 15 30 12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 889.0 884.9 883.7 883.4 884.4 880.4 879.3 880.6 884.4 889.1 894.4 887.8 885.1 MAX. QFE PRESSURE IN HPA 894.3 892.0 891.2 891.1 889.3 886.7 883.6 884.4 888.0 894.2 899.5 896.0 899.5 DAY 1 12 3 5 9 6 11 16 15 9 22 7 MIN. QFE PRESSURE IN HPA 882.8 877.0 872.2 878.7 880.5 874.7 874.2 876.7 879.6 881.8 888.3 878.5 872.2 DAY 27 2 20 18 26 26 17 4 8 15 30 12 MEAN QNH PRESSURE IN HPA 1017.9 1013.3 1012.0 1011.7 1012.8 1008.3 1007.0 1008.6 1012.7 1018.0 1024.0 1016.5 1013.6 MAX. QNH PRESSURE IN HPA 1023.8 1021.3 1020.4 1020.2 1018.2 1015.3 1011.9 1012.8 1016.8 1023.7 1029.6 1025.7 1029.6 DAY 1 12 3 5 9 6 11 16 15 9 22 7 MIN. QNH PRESSURE IN HPA 1011.0 1004.5 999.1 1006.4 1008.4 1001.9 1001.4 1004.2 1007.4 1009.9 1017.1 1006.2 999.1 DAY 27 2 20 18 26 26 17 4 8 15 30 12 MEAN QFF PRESSURE IN HPA 1017.7 1012.4 1010.3 1007.5 1005.9 998.3 996.6 998.2 1004.7 1013.7 1022.6 1017.4 1008.8 MAX. QFF PRESSURE IN HPA 1024.9 1020.6 1022.1 1019.2 1014.6 1005.7 1001.5 1004.0 1008.9 1021.3 1029.1 1026.7 1029.1 DAY 1 12 3 5 9 6 8 16 4 18 23 23 MIN. QFF PRESSURE IN HPA 1008.0 1002.8 998.8 999.7 1000.1 991.4 990.3 993.6 997.8 1004.3 1017.1 1006.0 990.3 DAY 27 2 18 21 26 26 6 4 8 1 5 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.6 5.5 11.8 16.0 24.3 29.3 33.6 32.6 27.9 19.8 14.1 6.4 18.9 MINIMUN AIR TEMPERATURE (C) -0.6 -0.4 3.8 8.5 15.6 19.7 24.6 23.1 19.2 12.6 7.1 -0.2 11.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 15 31 29 11 0 0 0 87 DAYS WITH MINIMUM TEMP. <=-4 2 3 0 0 0 0 0 0 0 0 0 5 10 DAYS WITH FREEZING MIN.<= 0 19 17 3 1 0 0 0 0 0 0 2 16 58 TEMPERATURE RECORDS LOWEST(C) -5.0 -7.0 -3.0 -2.0 9.0 10.0 21.0 20.0 12.0 5.0 -2.0 -7.0 -7.0 DAY 23 3 1 2 1 7 4 7 26 23 30 25 MAXIMUM AIR TEMPERATURE (C) 10.4 10.3 16.5 20.9 29.2 34.1 38.2 37.5 32.9 24.7 18.7 11.5 23.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 15 27 31 31 25 0 0 0 129 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.0 17.0 22.0 29.0 33.0 37.0 43.0 40.0 38.0 29.0 26.0 17.0 43.0 DAY 17 24 7 24 14 17 8 21 3 11 1 8 DIF. BETWEEN (MAX.-MIN.) (C) 11.0 10.7 12.7 12.4 13.6 14.4 13.6 14.4 13.7 12.1 11.6 11.7 12.6 MEAN DAILY TEMP. (MDT) (C) 4.9 4.9 10.2 14.7 22.4 26.9 31.4 30.3 26.0 18.6 12.9 5.7 17.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 63.0 181.0 322.5 288.0 153.5 3.5 0.0 0.0 1011.5 HEATING DEG. DAYS(BASE 18 0C) 407.0 365.5 242.5 113.5 1.5 0.0 0.0 0.0 0.0 25.0 154.5 382.0 1691.5 DEWPOINT (MEAN C) -2.9 -3.3 -5.9 1.2 5.5 6.5 8.6 6.2 6.8 4.7 3.2 -3.4 2.3 MIXING RATIO (G/KG) 3.55 3.57 2.90 4.98 6.64 7.06 8.11 6.98 7.28 6.10 5.64 3.48 5.52 VAPOUR PRESSURE (HPA) 5.04 5.05 4.10 7.00 9.34 9.89 11.32 9.78 10.22 8.65 7.98 4.94 7.77 SATURATION DEF. (HPA) 4.47 4.33 10.39 12.48 22.19 32.58 42.18 40.81 29.00 15.33 9.05 5.14 19.00 RELATIVE HUMIDITY (MEAN %) 57 55 31 41 32 25 23 21 29 39 50 51 38 RELATIVE HUMIDITY (MAX. %) 69 68 44 60 49 39 35 34 40 51 63 62 51 RELATIVE HUMIDITY (MIN. %) 46 45 22 28 24 20 16 14 21 29 40 40 29 RELATIVE HUMIDITY (MEAN% 03UTC) 68 67 43 57 49 39 35 33 39 50 62 61 50 RELATIVE HUMIDITY (MEAN% 09UTC) 50 51 25 36 27 21 18 16 24 31 42 42 32 RELATIVE HUMIDITY (MEAN% 15UTC) 57 54 27 35 28 21 20 17 27 40 52 53 36 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 6.2 11.5 1.6 16.8 11.6 0.0 0.0 0.0 0.0 13.4 3.0 0.0 64.1 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH PRECIPITATION >= 5 0 1 0 1 1 0 0 0 0 2 0 0 5 DAYS WITH PRECIPITATION >= 1 2 3 1 8 3 0 0 0 0 3 2 0 22 DAYS WITH PRECIPITATION 6 8 2 12 6 0 0 1 1 8 3 2 49 GREATEST DAILY PRECIPITATION 4.0 8.0 1.0 5.0 7.0 0.0 0.0 0.0 0.0 7.2 2.0 0.0 8.0 DAY 31 15 8 10 18 ** ** ** ** 3 25 ** DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 1 1 0 1 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 0 2 3 4 3 0 0 3 0 0 0 15 WIND DIRECTION (PREVAILING) 180 180 180 180 225 180 135 135 180 315 180 180 180 PREVAILING WIND SPEED(KNOTS) 6.2 6.9 9.7 9.2 12.1 8.2 8.2 7.4 8.1 6.9 6.3 5.3 7.6 PREVAILING WIND PERCENT 11.0 15.7 17.4 18.0 20.6 16.7 16.1 14.8 21.3 14.8 9.3 8.4 12.8 CALMS PERCENT OF WIND 74.2 60.7 47.1 44.7 40.0 44.7 57.4 56.1 44.7 58.1 74.7 83.2 57.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 239 211 211 216 222 170 82 162 199 229 196 198 199 VECTOR WIND MAGNITUDE(KNOTS) 0.6 1.6 2.4 2.6 2.8 1.2 2.4 1.5 2.1 1.2 0.7 0.3 1.2 WIND STEADINESES (MEAN %) 33.3 51.6 48.0 54.2 48.3 24.5 63.2 51.7 44.7 38.7 43.8 27.3 33.3 WIND SPEED (MEAN KNOTS) 1.8 3.1 5.0 4.8 5.8 4.9 3.8 2.9 4.7 3.1 1.6 1.1 3.6 FASTEST WIND DIRECTION 340 210 260 220 270 210 360 330 240 210 270 350 270 FASTEST WIND SPEED (KNOTS) 20 20 25 25 50 20 16 12 20 15 15 20 50 DAY 22 1 18 26 18 23 3 21 20 11 4 23 DAYS WITH SKY CLEAR (0-2)/8 19 12 19 9 13 30 28 29 29 16 18 20 242 DAYS WITH P.CLOUDY (3-6)/8 9 9 11 17 16 0 3 2 1 14 9 9 100 DAYS WITH CLOUDY (7-8)/8 3 7 1 4 2 0 0 0 0 1 3 2 23 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 1 0 0 0 0 0 1 0 2 DURATION OF SUNSHINE HOURS 221.0 165.0 269.5 214.6 273.8 346.2 346.2 343.6 303.8 232.6 204.7 216.6 3137.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 889.4 885.8 882.7 883.2 885.3 882.0 879.1 881.2 884.1 890.6 888.8 887.8 885.0 MAX. QFE PRESSURE IN HPA 897.8 897.3 894.6 890.6 894.7 889.1 886.1 886.1 891.0 899.4 893.6 895.9 899.4 DAY-HOUR 7- 6 28- 6 1- 6 7- 6 3- 6 8- 6 15- 6 16- 6 25- 6 15- 6 6- 6 12- 6 MIN. QFE PRESSURE IN HPA 879.2 873.0 872.0 871.9 877.3 873.1 872.5 877.0 876.4 881.4 883.4 873.7 871.9 DAY-HOUR 21-12 24-15 23-12 26-12 27-15 20-12 9-15 18-15 18-15 1-15 25-12 23-12 MEAN QNH PRESSURE IN HPA 1018.3 1014.3 1010.9 1011.5 1013.8 1010.1 1006.8 1009.2 1012.4 1019.7 1017.6 1016.5 1013.4 MAX. QNH PRESSURE IN HPA 1027.7 1027.2 1024.2 1019.7 1024.3 1018.0 1014.7 1014.7 1020.1 1029.5 1023.0 1025.6 1029.5 DAY-HOUR 7- 6 28- 6 1- 6 7- 6 3- 6 8- 6 15- 6 16- 6 25- 6 15- 6 6- 6 12- 6 MIN. QNH PRESSURE IN HPA 1007.0 1000.0 998.9 998.8 1004.8 1000.2 999.5 1004.5 1003.8 1009.4 1011.7 1000.8 998.8 DAY-HOUR 21-12 24-15 23-12 26-12 27-15 20-12 9-15 18-15 18-15 1-15 25-12 23-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 889.3 885.6 883.0 883.5 886.0 882.7 879.7 881.8 884.6 890.6 888.9 887.8 885.3 MAX. QFE PRESSURE IN HPA 896.5 895.6 893.7 889.3 893.4 887.8 885.6 885.2 889.5 897.5 892.4 894.6 897.5 DAY 7 28 1 11 3 7 15 16 25 15 6 12 MIN. QFE PRESSURE IN HPA 880.3 878.5 872.9 873.3 880.4 875.0 874.3 879.1 879.2 883.0 884.3 878.5 872.9 DAY 21 15 23 25 29 20 10 20 18 1 25 23 MEAN QNH PRESSURE IN HPA 1018.2 1014.1 1011.2 1011.8 1014.5 1010.8 1007.5 1009.8 1013.0 1019.7 1017.8 1016.6 1013.8 MAX. QNH PRESSURE IN HPA 1026.3 1025.3 1023.2 1018.2 1022.8 1016.6 1014.1 1013.7 1018.5 1027.4 1021.7 1024.2 1027.4 DAY 7 28 1 11 3 7 15 16 25 15 6 12 MIN. QNH PRESSURE IN HPA 1008.2 1006.2 999.9 1000.4 1008.3 1002.3 1001.5 1006.9 1007.0 1011.2 1012.7 1006.2 999.9 DAY 21 15 23 25 29 20 10 20 18 1 25 23 MEAN QFF PRESSURE IN HPA 1020.5 1016.1 1010.5 1009.0 1008.0 1002.1 996.8 999.7 1005.0 1015.4 1016.0 1018.6 1009.8 MAX. QFF PRESSURE IN HPA 1029.4 1029.2 1026.5 1019.1 1017.6 1011.8 1003.0 1003.0 1013.2 1024.9 1022.6 1026.5 1029.4 DAY 7 28 1 4 3 7 15 25 26 15 29 1 MIN. QFF PRESSURE IN HPA 1008.4 1006.0 997.9 993.2 999.9 992.3 989.7 996.4 998.3 1005.0 1010.2 1007.3 989.7 DAY 21 25 23 25 31 20 9 5 7 1 25 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 890.5 887.1 884.2 884.7 886.6 883.5 880.3 882.5 885.5 891.9 889.9 889.2 886.3 MAX. QFE PRESSURE IN HPA 897.8 897.3 894.6 890.6 894.7 889.1 886.1 886.1 891.0 899.4 893.6 895.9 899.4 DAY 7 28 1 7 3 8 15 16 25 15 6 12 MIN. QFE PRESSURE IN HPA 881.0 880.1 874.0 874.8 880.5 875.4 875.0 879.8 879.6 884.4 885.7 878.1 874.0 DAY 22 15 23 25 31 20 9 5 18 1 25 23 MEAN QNH PRESSURE IN HPA 1019.6 1015.7 1012.5 1013.1 1015.2 1011.7 1008.2 1010.7 1014.0 1021.1 1018.9 1018.1 1014.9 MAX. QNH PRESSURE IN HPA 1027.7 1027.2 1024.2 1019.7 1024.3 1018.0 1014.7 1014.7 1020.1 1029.5 1023.0 1025.6 1029.5 DAY 7 28 1 7 3 8 15 16 25 15 6 12 MIN. QNH PRESSURE IN HPA 1009.0 1008.0 1001.2 1002.1 1008.4 1002.7 1002.3 1007.6 1007.4 1012.8 1014.2 1005.7 1001.2 DAY 22 15 23 25 31 20 9 5 18 1 25 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 889.8 886.5 883.3 883.8 885.7 882.5 879.6 881.7 884.6 891.0 889.0 888.0 885.5 MAX. QFE PRESSURE IN HPA 896.9 896.7 893.0 890.0 893.5 888.3 885.6 885.2 890.1 898.8 892.8 894.6 898.8 DAY 6 28 1 7 3 7 15 16 25 15 6 12 MIN. QFE PRESSURE IN HPA 880.6 878.9 873.4 873.7 879.4 874.4 874.5 878.7 878.6 883.8 884.8 875.4 873.4 DAY 21 25 23 26 31 20 10 5 18 1 25 23 MEAN QNH PRESSURE IN HPA 1018.8 1015.1 1011.6 1012.1 1014.3 1010.7 1007.5 1009.8 1013.0 1020.1 1017.9 1016.8 1014.0 MAX. QNH PRESSURE IN HPA 1026.7 1026.5 1022.4 1019.0 1022.9 1017.1 1014.1 1013.7 1019.1 1028.8 1022.1 1024.2 1028.8 DAY 6 28 1 7 3 7 15 16 25 15 6 12 MIN. QNH PRESSURE IN HPA 1008.5 1006.6 1000.5 1000.8 1007.2 1001.6 1001.7 1006.4 1006.3 1012.1 1013.2 1002.7 1000.5 DAY 21 25 23 26 31 20 10 5 18 1 25 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 888.5 884.9 881.6 882.2 884.2 881.1 878.2 880.3 882.9 889.7 887.9 886.8 884.0 MAX. QFE PRESSURE IN HPA 895.6 895.0 891.2 887.9 891.2 887.0 884.0 883.6 888.2 897.3 891.9 892.9 897.3 DAY 6 28 3 7 3 7 15 15 25 15 6 12 MIN. QFE PRESSURE IN HPA 879.2 876.2 872.0 871.9 877.7 873.1 873.3 877.6 876.8 882.0 883.4 873.7 871.9 DAY 21 24 23 26 31 20 10 5 18 1 25 23 MEAN QNH PRESSURE IN HPA 1017.4 1013.3 1009.6 1010.3 1012.6 1009.0 1005.8 1008.2 1011.1 1018.6 1016.7 1015.5 1012.3 MAX. QNH PRESSURE IN HPA 1025.3 1024.6 1020.4 1016.7 1020.4 1015.7 1012.3 1011.9 1017.0 1027.2 1021.1 1022.3 1027.2 DAY 6 28 3 7 3 7 15 15 25 15 6 12 MIN. QNH PRESSURE IN HPA 1007.0 1003.6 998.9 998.8 1005.3 1000.2 1000.4 1005.2 1004.3 1010.1 1011.7 1000.8 998.8 DAY 21 24 23 26 31 20 10 5 18 1 25 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 888.8 885.0 881.6 882.1 884.0 880.5 877.5 879.9 882.7 889.7 888.3 887.1 883.9 MAX. QFE PRESSURE IN HPA 895.6 894.3 890.6 887.7 891.0 886.5 883.3 883.8 887.7 896.9 892.1 892.9 896.9 DAY 6 28 3 12 2 7 15 16 25 15 6 12 MIN. QFE PRESSURE IN HPA 879.2 873.0 872.2 871.9 877.3 874.0 872.5 877.0 876.4 881.4 883.8 875.6 871.9 DAY 21 24 24 26 27 20 9 18 18 1 25 23 MEAN QNH PRESSURE IN HPA 1017.6 1013.4 1009.6 1010.2 1012.3 1008.5 1005.1 1007.7 1010.9 1018.7 1017.1 1015.8 1012.2 MAX. QNH PRESSURE IN HPA 1025.3 1023.8 1019.7 1016.5 1020.1 1015.1 1011.5 1012.1 1016.5 1026.7 1021.4 1022.3 1026.7 DAY 6 28 3 12 2 7 15 16 25 15 6 12 MIN. QNH PRESSURE IN HPA 1007.0 1000.0 999.1 998.8 1004.8 1001.2 999.5 1004.5 1003.8 1009.4 1012.1 1002.9 998.8 DAY 21 24 24 26 27 20 9 18 18 1 25 23 MEAN QFF PRESSURE IN HPA 1019.8 1015.4 1008.9 1007.2 1005.7 999.6 994.2 997.6 1002.9 1014.4 1015.3 1017.7 1008.2 MAX. QFF PRESSURE IN HPA 1028.8 1029.2 1022.8 1016.7 1015.3 1009.5 1000.8 1002.1 1010.7 1024.3 1024.0 1025.9 1029.2 DAY 6 3 1 1 2 7 15 16 25 15 30 27 MIN. QFF PRESSURE IN HPA 1007.7 998.3 998.8 994.7 996.2 991.2 987.8 994.1 995.7 1003.1 1009.6 1004.1 987.8 DAY 21 24 22 25 31 20 9 5 18 1 25 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.9 6.3 12.5 18.0 23.9 28.9 32.7 32.5 28.8 21.9 13.2 7.6 19.3 MINIMUN AIR TEMPERATURE (C) -1.2 -0.3 5.7 10.3 15.7 19.9 23.1 23.3 18.8 13.2 6.7 2.1 11.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 3 11 27 26 6 0 0 0 73 DAYS WITH MINIMUM TEMP. <=-4 7 6 0 0 0 0 0 0 0 0 0 0 13 DAYS WITH FREEZING MIN.<= 0 24 15 4 0 0 0 0 0 0 0 0 8 51 TEMPERATURE RECORDS LOWEST(C) -8.0 -7.0 -2.0 3.0 9.0 14.0 17.0 17.0 14.0 4.0 3.0 -2.0 -8.0 DAY 19 6 25 4 1 4 14 28 19 29 20 24 MAXIMUM AIR TEMPERATURE (C) 9.3 10.6 16.9 22.7 28.9 33.6 37.2 37.3 33.6 26.7 17.8 12.3 23.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 13 26 31 31 30 11 0 0 144 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.0 19.0 25.0 31.0 35.0 39.0 42.0 41.0 38.0 31.0 21.0 17.0 42.0 DAY 15 29 13 18 21 19 5 16 3 1 15 1 DIF. BETWEEN (MAX.-MIN.) (C) 10.5 10.9 11.2 12.4 13.2 13.7 14.1 14.0 14.8 13.5 11.1 10.2 12.5 MEAN DAILY TEMP. (MDT) (C) 4.0 5.2 11.3 16.5 22.3 26.7 30.1 30.3 26.2 20.0 12.2 7.2 17.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 9.5 55.5 172.0 283.0 287.5 157.0 30.0 0.0 0.0 994.5 HEATING DEG. DAYS(BASE 18 0C) 433.0 372.0 210.5 77.0 1.5 0.0 0.0 0.0 0.0 26.5 173.0 335.0 1628.5 DEWPOINT (MEAN C) -3.8 -3.1 1.1 3.1 8.8 9.8 9.5 10.4 7.0 5.6 4.8 0.3 4.4 MIXING RATIO (G/KG) 3.41 3.52 4.89 5.57 8.22 8.76 8.68 9.17 7.61 6.80 6.10 4.51 6.44 VAPOUR PRESSURE (HPA) 4.82 4.99 6.90 7.86 11.56 12.25 12.12 12.81 10.69 9.60 8.66 6.39 9.05 SATURATION DEF. (HPA) 4.20 5.09 8.27 13.89 19.20 29.35 39.01 37.85 30.34 18.03 6.87 4.34 18.04 RELATIVE HUMIDITY (MEAN %) 56 53 48 40 40 33 26 27 27 37 58 62 42 RELATIVE HUMIDITY (MAX. %) 69 71 63 55 57 48 37 37 36 51 74 76 56 RELATIVE HUMIDITY (MIN. %) 44 41 36 30 32 25 20 21 21 27 46 50 33 RELATIVE HUMIDITY (MEAN% 03UTC) 67 69 61 55 56 48 37 37 35 50 70 74 55 RELATIVE HUMIDITY (MEAN% 09UTC) 48 45 42 33 33 29 22 23 23 30 49 53 36 RELATIVE HUMIDITY (MEAN% 15UTC) 56 49 43 37 38 28 22 24 25 36 58 64 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 10.0 29.6 15.8 20.3 31.7 11.9 0.0 0.0 0.0 0.4 13.5 6.3 139.5 DAYS WITH PRECIPITATION >=10 0 1 1 1 1 1 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 0 1 1 1 1 1 0 0 0 0 2 0 7 DAYS WITH PRECIPITATION >= 1 3 3 5 6 5 2 0 0 0 0 2 4 30 DAYS WITH PRECIPITATION 6 4 8 8 10 5 0 0 0 1 6 8 56 GREATEST DAILY PRECIPITATION 4.0 26.0 11.0 12.0 23.0 10.0 0.0 0.0 0.0 0.4 7.4 2.0 26.0 DAY 16 23 17 3 28 3 ** ** ** 25 10 27 DAY WITH THUNDER STORM 0 0 0 1 0 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 2 1 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 0 4 0 0 1 0 0 0 0 0 0 5 WIND DIRECTION (PREVAILING) 315 360 180 180 180 180 45 135 180 135 135 135 180 PREVAILING WIND SPEED(KNOTS) 5.5 15.5 7.6 8.0 6.1 7.6 8.0 5.9 7.4 5.9 5.9 5.2 7.2 PREVAILING WIND PERCENT 3.9 5.5 11.0 15.3 11.0 12.7 16.8 8.4 16.7 14.8 13.3 3.9 9.1 CALMS PERCENT OF WIND 88.4 74.5 54.8 60.0 64.5 52.0 49.7 63.9 47.3 56.1 62.7 86.5 63.4 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 241 351 258 219 244 147 66 126 189 180 165 186 181 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.7 1.9 0.8 0.1 1.1 1.3 1.0 2.0 1.3 1.2 0.4 0.5 WIND STEADINESES (MEAN %) 28.6 28.0 40.4 23.5 3.7 30.6 35.1 43.5 51.3 40.6 54.5 50.0 17.9 WIND SPEED (MEAN KNOTS) 0.7 2.5 4.7 3.4 2.7 3.6 3.7 2.3 3.9 3.2 2.2 0.8 2.8 FASTEST WIND DIRECTION 270 360 270 210 270 160 330 160 210 360 150 220 270 FASTEST WIND SPEED (KNOTS) 12 25 30 20 15 12 25 12 15 15 15 15 30 DAY 23 3 15 3 1 6 12 12 10 15 3 1 DAYS WITH SKY CLEAR (0-2)/8 17 10 17 8 12 26 31 28 30 23 12 17 231 DAYS WITH P.CLOUDY (3-6)/8 9 17 9 15 16 4 0 3 0 8 11 10 102 DAYS WITH CLOUDY (7-8)/8 5 2 5 7 3 0 0 0 0 0 7 4 33 DAYS WITH VISIBILITY =< 2 KM 0 0 2 0 0 0 0 0 0 0 0 0 2 DURATION OF SUNSHINE HOURS 179.9 184.0 212.9 191.2 247.1 343.1 359.5 334.0 322.3 267.3 182.8 189.1 3013.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 885.0 887.1 885.4 885.7 886.4 881.9 881.8 881.8 885.6 889.7 891.1 888.1 885.8 MAX. QFE PRESSURE IN HPA 894.4 895.0 898.1 892.6 892.0 889.8 887.5 889.1 892.2 898.6 897.4 897.8 898.6 DAY-HOUR 19- 6 7- 6 27- 6 1- 6 8- 6 2- 6 20- 6 30- 6 19- 6 16- 6 22- 6 23- 6 MIN. QFE PRESSURE IN HPA 872.6 871.9 876.4 873.5 881.2 875.9 873.0 876.2 878.9 880.1 884.3 880.8 871.9 DAY-HOUR 16-15 3- 3 10-12 24-15 14-15 15-15 11-15 1-15 6-15 25-12 1-15 9-12 MEAN QNH PRESSURE IN HPA 1013.4 1015.8 1013.8 1014.2 1015.0 1010.0 1009.9 1009.9 1014.1 1018.7 1020.3 1016.9 1014.3 MAX. QNH PRESSURE IN HPA 1023.9 1024.6 1028.1 1021.9 1021.3 1018.8 1016.2 1018.0 1021.5 1028.6 1027.3 1027.7 1028.6 DAY-HOUR 19- 6 7- 6 27- 6 1- 6 8- 6 2- 6 20- 6 30- 6 19- 6 16- 6 22- 6 23- 6 MIN. QNH PRESSURE IN HPA 999.6 998.8 1003.8 1000.6 1009.2 1003.3 1000.0 1003.6 1006.6 1008.0 1012.7 1008.7 998.8 DAY-HOUR 16-15 3- 3 10-12 24-15 14-15 15-15 11-15 1-15 6-15 25-12 1-15 9-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 884.9 887.0 885.4 886.1 887.0 882.7 882.4 882.3 886.2 889.8 891.3 888.0 886.1 MAX. QFE PRESSURE IN HPA 892.8 894.5 896.7 892.0 891.3 889.6 887.0 888.5 891.8 896.7 896.6 895.3 896.7 DAY 19 6 27 1 8 1 15 30 19 16 22 21 MIN. QFE PRESSURE IN HPA 877.3 871.9 876.6 876.7 883.2 877.5 876.5 878.6 880.5 882.9 886.9 881.5 871.9 DAY 16 3 10 24 15 20 11 13 7 26 29 9 MEAN QNH PRESSURE IN HPA 1013.3 1015.7 1013.9 1014.7 1015.7 1010.8 1010.6 1010.4 1014.7 1018.8 1020.5 1016.8 1014.6 MAX. QNH PRESSURE IN HPA 1022.1 1024.0 1026.5 1021.3 1020.5 1018.6 1015.7 1017.3 1021.0 1026.5 1026.4 1024.9 1026.5 DAY 19 6 27 1 8 1 15 30 19 16 22 21 MIN. QNH PRESSURE IN HPA 1004.8 998.8 1004.1 1004.2 1011.4 1005.1 1003.9 1006.3 1008.4 1011.1 1015.6 1009.5 998.8 DAY 16 3 10 24 15 20 11 13 7 26 29 9 MEAN QFF PRESSURE IN HPA 1015.7 1017.4 1012.5 1010.9 1009.2 1002.0 1000.1 1000.0 1006.5 1013.3 1018.7 1017.8 1010.3 MAX. QFF PRESSURE IN HPA 1026.8 1029.3 1028.0 1018.2 1015.1 1011.2 1007.0 1009.0 1015.0 1022.3 1026.0 1027.2 1029.3 DAY 19 6 27 1 4 1 15 30 19 30 24 24 MIN. QFF PRESSURE IN HPA 1003.9 999.3 1001.9 999.2 1003.4 994.0 992.0 995.1 998.9 1005.8 1013.4 1010.1 992.0 DAY 16 3 10 24 21 30 5 13 7 4 29 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 886.3 888.3 886.6 887.0 887.6 883.1 883.2 883.0 886.9 891.0 892.3 889.6 887.1 MAX. QFE PRESSURE IN HPA 894.4 895.0 898.1 892.6 892.0 889.8 887.5 889.1 892.2 898.6 897.4 897.8 898.6 DAY 19 7 27 1 8 2 20 30 19 16 22 23 MIN. QFE PRESSURE IN HPA 877.9 872.6 878.3 877.3 883.4 878.0 877.6 878.9 881.4 883.1 887.5 882.4 872.6 DAY 16 3 10 24 15 23 5 13 7 25 29 9 MEAN QNH PRESSURE IN HPA 1014.9 1017.1 1015.2 1015.7 1016.4 1011.4 1011.4 1011.3 1015.6 1020.1 1021.6 1018.6 1015.8 MAX. QNH PRESSURE IN HPA 1023.9 1024.6 1028.1 1021.9 1021.3 1018.8 1016.2 1018.0 1021.5 1028.6 1027.3 1027.7 1028.6 DAY 19 7 27 1 8 2 20 30 19 16 22 23 MIN. QNH PRESSURE IN HPA 1005.5 999.6 1006.0 1004.8 1011.7 1005.6 1005.2 1006.6 1009.4 1011.3 1016.2 1010.5 999.6 DAY 16 3 10 24 15 23 5 13 7 25 29 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 885.2 887.7 885.9 886.2 886.8 882.5 882.3 882.5 886.2 890.2 891.5 888.4 886.3 MAX. QFE PRESSURE IN HPA 894.0 894.2 897.4 891.5 891.4 889.1 887.4 888.0 891.2 897.4 896.7 896.0 897.4 DAY 19 7 27 1 8 1 15 30 19 16 24 23 MIN. QFE PRESSURE IN HPA 875.0 872.5 877.5 876.2 882.7 877.6 875.9 878.3 880.8 881.0 887.0 881.7 872.5 DAY 16 3 10 24 15 23 11 13 6 25 29 9 MEAN QNH PRESSURE IN HPA 1013.6 1016.5 1014.5 1014.8 1015.4 1010.6 1010.4 1010.7 1014.7 1019.3 1020.7 1017.2 1014.9 MAX. QNH PRESSURE IN HPA 1023.5 1023.7 1027.3 1020.7 1020.6 1018.0 1016.1 1016.8 1020.4 1027.3 1026.5 1025.7 1027.3 DAY 19 7 27 1 8 1 15 30 19 16 24 23 MIN. QNH PRESSURE IN HPA 1002.3 999.5 1005.1 1003.6 1010.9 1005.2 1003.3 1006.0 1008.7 1009.0 1015.7 1009.8 999.5 DAY 16 3 10 24 15 23 11 13 6 25 29 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 884.2 886.3 884.5 884.7 885.5 880.9 881.1 880.9 884.6 888.8 890.4 887.2 884.9 MAX. QFE PRESSURE IN HPA 893.0 893.0 895.5 889.7 889.5 887.9 885.7 886.8 889.8 896.7 895.6 895.4 896.7 DAY 19 5 26 1 8 1 26 28 19 16 24 23 MIN. QFE PRESSURE IN HPA 873.5 873.5 876.4 873.9 882.0 876.0 875.7 877.0 879.7 880.1 885.7 880.8 873.5 DAY 16 3 10 24 16 23 11 1 7 25 1 9 MEAN QNH PRESSURE IN HPA 1012.6 1014.9 1012.9 1013.1 1014.0 1008.9 1009.1 1008.9 1013.0 1017.7 1019.5 1015.9 1013.4 MAX. QNH PRESSURE IN HPA 1022.4 1022.4 1025.2 1018.7 1018.5 1016.7 1014.2 1015.4 1018.8 1026.5 1025.3 1025.0 1026.5 DAY 19 5 26 1 8 1 26 28 19 16 24 23 MIN. QNH PRESSURE IN HPA 1000.6 1000.6 1003.8 1001.0 1010.1 1003.4 1003.1 1004.5 1007.5 1008.0 1014.2 1008.7 1000.6 DAY 16 3 10 24 16 23 11 1 7 25 1 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 884.4 886.3 884.4 884.6 885.3 880.3 880.3 880.3 884.3 888.8 890.4 887.6 884.7 MAX. QFE PRESSURE IN HPA 893.3 893.5 895.5 888.8 888.8 888.5 884.1 885.9 889.7 896.4 895.9 895.7 896.4 DAY 19 5 26 8 7 1 26 28 18 16 24 23 MIN. QFE PRESSURE IN HPA 872.6 875.5 877.3 873.5 881.2 875.9 873.0 876.2 878.9 880.6 884.3 881.1 872.6 DAY 16 3 9 24 14 15 11 1 6 25 1 15 MEAN QNH PRESSURE IN HPA 1012.7 1014.9 1012.8 1013.0 1013.7 1008.2 1008.1 1008.2 1012.6 1017.6 1019.4 1016.3 1013.1 MAX. QNH PRESSURE IN HPA 1022.7 1022.9 1025.2 1017.7 1017.7 1017.3 1012.4 1014.4 1018.7 1026.2 1025.6 1025.4 1026.2 DAY 19 5 26 8 7 1 26 28 18 16 24 23 MIN. QNH PRESSURE IN HPA 999.6 1002.8 1004.8 1000.6 1009.2 1003.3 1000.0 1003.6 1006.6 1008.5 1012.7 1009.1 999.6 DAY 16 3 9 24 14 15 11 1 6 25 1 15 MEAN QFF PRESSURE IN HPA 1015.0 1016.6 1011.4 1009.1 1007.1 999.3 997.6 997.7 1004.2 1012.2 1017.6 1017.3 1008.8 MAX. QFF PRESSURE IN HPA 1027.3 1027.8 1026.9 1015.8 1012.4 1010.0 1003.1 1006.7 1012.3 1022.4 1025.0 1027.7 1027.8 DAY 19 6 26 6 3 1 15 28 18 30 24 23 MIN. QFF PRESSURE IN HPA 998.8 1004.8 1000.9 996.1 1001.8 992.4 988.6 992.1 996.9 1002.0 1009.9 1009.3 988.6 DAY 16 3 14 24 20 30 11 1 6 4 1 1 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.5 4.1 13.9 17.9 25.0 30.2 32.1 30.2 26.0 21.2 10.6 8.6 18.4 MINIMUN AIR TEMPERATURE (C) -2.3 -0.2 7.7 10.7 16.6 21.1 23.3 21.4 17.0 13.9 3.9 2.8 11.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 20 25 21 2 0 0 0 70 DAYS WITH MINIMUM TEMP. <=-4 11 3 0 0 0 0 0 0 0 0 0 0 14 DAYS WITH FREEZING MIN.<= 0 26 18 1 0 0 0 0 0 0 0 6 4 55 TEMPERATURE RECORDS LOWEST(C) -11.0 -5.0 0.0 1.0 12.0 13.0 17.0 17.0 7.0 6.0 -3.0 -1.0 -11.0 DAY 8 17 25 15 8 2 11 27 13 31 18 30 MAXIMUM AIR TEMPERATURE (C) 4.8 8.1 18.2 22.2 29.8 35.1 36.9 35.5 31.2 26.6 15.5 13.5 23.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 16 28 31 29 25 7 0 0 137 DAYS WITH MAXIMUM TEMP. <= 0 3 0 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS HIGHEST(C) 11.0 19.0 26.0 30.0 36.0 41.0 42.0 40.0 36.0 34.0 22.0 18.0 42.0 DAY 17 28 31 29 27 30 23 4 9 6 1 23 DIF. BETWEEN (MAX.-MIN.) (C) 7.1 8.3 10.5 11.5 13.2 14.0 13.6 14.1 14.2 12.7 11.6 10.7 11.8 MEAN DAILY TEMP. (MDT) (C) 1.2 3.9 13.0 16.5 23.2 28.1 30.1 28.5 24.1 20.3 9.7 8.1 17.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 5.0 76.0 212.0 283.0 231.5 116.0 32.0 0.0 0.0 955.5 HEATING DEG. DAYS(BASE 18 0C) 520.0 393.5 158.5 81.0 0.0 0.0 0.0 0.0 10.0 17.5 249.0 305.5 1735.0 DEWPOINT (MEAN C) -3.3 -1.7 6.1 5.6 6.7 6.7 11.9 9.9 8.8 7.7 -0.3 -0.7 4.8 MIXING RATIO (G/KG) 3.52 3.92 6.88 6.71 7.09 7.08 10.09 8.86 8.16 7.55 4.45 4.16 6.54 VAPOUR PRESSURE (HPA) 4.99 5.56 9.67 9.44 9.96 9.93 14.05 12.41 11.48 10.66 6.32 5.90 9.20 SATURATION DEF. (HPA) 2.08 3.03 6.92 12.26 22.94 34.55 35.66 32.10 23.87 15.77 7.11 5.56 16.82 RELATIVE HUMIDITY (MEAN %) 72 67 62 48 33 24 30 30 36 44 49 54 46 RELATIVE HUMIDITY (MAX. %) 82 80 80 64 48 35 42 42 48 57 62 69 59 RELATIVE HUMIDITY (MIN. %) 62 56 49 37 24 18 24 23 27 33 38 41 36 RELATIVE HUMIDITY (MEAN% 03UTC) 76 79 77 63 48 35 42 42 48 56 61 68 58 RELATIVE HUMIDITY (MEAN% 09UTC) 68 62 55 41 27 20 26 26 30 36 41 43 40 RELATIVE HUMIDITY (MEAN% 15UTC) 75 64 59 44 29 21 28 28 35 44 52 57 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 80.2 19.2 21.3 46.1 12.3 0.0 0.0 0.0 10.4 26.7 8.2 4.8 229.2 DAYS WITH PRECIPITATION >=10 3 0 0 1 1 0 0 0 1 1 0 0 7 DAYS WITH PRECIPITATION >= 5 4 2 1 3 1 0 0 0 1 3 1 0 16 DAYS WITH PRECIPITATION >= 1 10 5 7 5 1 0 0 0 1 3 2 2 36 DAYS WITH PRECIPITATION 11 6 15 9 6 4 2 2 1 5 3 4 68 GREATEST DAILY PRECIPITATION 27.0 8.0 6.0 27.0 12.0 0.0 0.0 0.0 10.4 13.0 5.0 3.0 27.0 DAY 23 21 15 13 7 ** ** ** 12 18 4 7 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 7 1 0 0 0 0 0 0 0 0 0 0 8 DAYS WITH DUST 0 0 4 4 5 1 0 0 0 0 0 0 14 WIND DIRECTION (PREVAILING) 180 180 225 180 225 180 45 315 225 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 5.8 6.5 8.1 6.4 7.6 6.9 6.5 7.7 6.7 8.0 7.1 6.4 7.1 PREVAILING WIND PERCENT 5.2 7.9 11.0 13.3 12.9 14.0 11.0 12.3 16.0 14.3 12.7 4.5 9.8 CALMS PERCENT OF WIND 89.0 79.3 63.9 55.3 51.6 48.7 63.2 52.3 50.0 54.7 70.7 87.7 63.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 161 150 155 1831 VECTOR WIND DIRECTION (MEAN) 179 224 241 212 220 220 139 330 206 223 190 212 218 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.5 1.7 1.7 1.6 1.6 0.3 0.3 1.3 1.8 0.8 0.3 0.9 WIND STEADINESES (MEAN %) 50.0 35.7 56.7 54.8 45.7 43.2 11.1 8.6 34.2 48.6 44.4 37.5 34.6 WIND SPEED (MEAN KNOTS) 0.6 1.4 3.0 3.1 3.5 3.7 2.7 3.5 3.8 3.7 1.8 0.8 2.6 FASTEST WIND DIRECTION 360 270 180 270 240 240 300 330 360 360 180 250 270 FASTEST WIND SPEED (KNOTS) 12 15 20 25 16 16 18 15 15 20 15 15 25 DAY 25 9 28 18 25 27 11 30 11 14 15 27 DAYS WITH SKY CLEAR (0-2)/8 8 4 2 7 19 28 27 26 27 14 21 13 196 DAYS WITH P.CLOUDY (3-6)/8 8 19 19 15 10 2 4 3 3 15 8 17 123 DAYS WITH CLOUDY (7-8)/8 15 5 10 8 2 0 0 2 0 2 1 1 46 DAYS WITH VISIBILITY =< 2 KM 1 0 0 0 0 0 0 0 0 0 0 0 1 DURATION OF SUNSHINE HOURS 114.1 120.1 138.2 188.9 297.6 345.2 344.4 329.5 307.5 253.0 244.7 198.6 2881.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 888.5 889.0 884.6 884.8 884.7 882.3 880.3 884.2 886.8 888.4 891.3 889.2 886.2 MAX. QFE PRESSURE IN HPA 897.5 897.8 892.8 891.4 894.6 890.5 884.3 891.9 897.3 894.3 899.1 894.8 899.1 DAY-HOUR 9- 6 3- 6 25- 9 23- 6 22- 6 2- 6 26- 6 31- 6 14- 6 1- 6 23- 6 9- 6 MIN. QFE PRESSURE IN HPA 876.9 880.4 874.4 873.6 876.0 875.0 875.6 877.6 878.0 878.0 881.8 881.2 873.6 DAY-HOUR 23-12 8-15 22-12 13-12 19-15 14-15 22-15 8-15 10-15 29-12 8-12 31-12 MEAN QNH PRESSURE IN HPA 1017.4 1017.9 1013.0 1013.2 1013.1 1010.4 1008.2 1012.6 1015.5 1017.3 1020.5 1018.2 1014.8 MAX. QNH PRESSURE IN HPA 1027.4 1027.7 1022.1 1020.6 1024.2 1019.6 1012.7 1021.1 1027.2 1023.8 1029.2 1024.4 1029.2 DAY-HOUR 9- 6 3- 6 25- 9 23- 6 22- 6 2- 6 26- 6 31- 6 14- 6 1- 6 23- 6 9- 6 MIN. QNH PRESSURE IN HPA 1004.4 1008.3 1001.6 1000.7 1003.4 1002.3 1002.9 1005.2 1005.6 1005.6 1009.9 1009.2 1000.7 DAY-HOUR 23-12 8-15 22-12 13-12 19-15 14-15 22-15 8-15 10-15 29-12 8-12 31-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 888.3 888.7 884.5 884.9 885.3 883.0 880.8 884.7 887.1 888.5 891.2 889.2 886.3 MAX. QFE PRESSURE IN HPA 895.6 895.7 891.4 891.0 893.4 889.9 883.5 891.5 896.3 893.2 897.8 893.4 897.8 DAY 9 4 25 23 22 2 26 31 14 1 23 11 MIN. QFE PRESSURE IN HPA 876.9 880.5 877.5 875.5 879.0 875.5 877.5 879.9 880.5 878.9 883.0 882.6 875.5 DAY 25 9 21 13 2 15 29 15 10 29 9 14 MEAN QNH PRESSURE IN HPA 1017.1 1017.5 1012.8 1013.3 1013.8 1011.2 1008.7 1013.1 1015.8 1017.4 1020.4 1018.1 1014.9 MAX. QNH PRESSURE IN HPA 1025.3 1025.4 1020.6 1020.1 1022.8 1018.9 1011.8 1020.7 1026.0 1022.6 1027.7 1022.8 1027.7 DAY 9 4 25 23 22 2 26 31 14 1 23 11 MIN. QNH PRESSURE IN HPA 1004.4 1008.4 1005.1 1002.8 1006.7 1002.8 1005.1 1007.7 1008.4 1006.6 1011.2 1010.8 1002.8 DAY 25 9 21 13 2 15 29 15 10 29 9 14 MEAN QFF PRESSURE IN HPA 1020.8 1020.1 1010.7 1009.5 1006.8 1002.0 998.3 1003.9 1008.8 1012.2 1020.5 1018.8 1011.0 MAX. QFF PRESSURE IN HPA 1032.2 1029.5 1022.9 1019.1 1018.1 1012.9 1004.6 1013.9 1023.1 1018.4 1028.7 1024.2 1032.2 DAY 9 4 25 15 22 2 12 31 14 15 19 11 MIN. QFF PRESSURE IN HPA 1007.7 1008.1 1001.9 1000.1 1000.1 991.8 993.6 997.1 999.1 1003.0 1007.9 1010.3 991.8 DAY 25 9 21 13 2 15 23 8 10 29 9 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 889.7 890.3 885.8 886.0 886.1 883.6 881.5 885.5 888.3 889.8 892.6 890.6 887.5 MAX. QFE PRESSURE IN HPA 897.5 897.8 892.5 891.4 894.6 890.5 884.3 891.9 897.3 894.3 899.1 894.8 899.1 DAY 9 3 12 23 22 2 26 31 14 1 23 9 MIN. QFE PRESSURE IN HPA 879.3 883.4 878.0 877.3 879.4 877.0 878.1 880.1 881.3 880.0 884.3 883.5 877.0 DAY 25 9 22 13 2 15 23 15 10 29 9 27 MEAN QNH PRESSURE IN HPA 1018.7 1019.3 1014.3 1014.6 1014.6 1011.9 1009.5 1014.0 1017.1 1018.8 1021.9 1019.7 1016.2 MAX. QNH PRESSURE IN HPA 1027.4 1027.7 1021.8 1020.6 1024.2 1019.6 1012.7 1021.1 1027.2 1023.8 1029.2 1024.4 1029.2 DAY 9 3 12 23 22 2 26 31 14 1 23 9 MIN. QNH PRESSURE IN HPA 1007.1 1011.7 1005.6 1004.8 1007.2 1004.5 1005.7 1008.0 1009.3 1007.9 1012.7 1011.8 1004.5 DAY 25 9 22 13 2 15 23 15 10 29 9 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 889.0 889.7 885.3 885.4 885.3 882.8 880.9 884.8 887.4 889.0 891.7 889.6 886.7 MAX. QFE PRESSURE IN HPA 896.6 897.6 892.8 890.3 893.9 890.3 883.6 891.5 896.1 893.1 898.4 893.8 898.4 DAY 9 3 25 23 22 2 26 31 13 1 23 9 MIN. QFE PRESSURE IN HPA 878.4 883.8 876.6 875.5 878.5 876.9 878.0 879.4 880.4 878.7 883.4 882.8 875.5 DAY 23 9 22 13 2 15 22 15 10 29 8 27 MEAN QNH PRESSURE IN HPA 1017.9 1018.7 1013.7 1013.9 1013.8 1011.0 1008.9 1013.2 1016.1 1017.9 1020.9 1018.5 1015.4 MAX. QNH PRESSURE IN HPA 1026.4 1027.5 1022.1 1019.4 1023.4 1019.4 1011.9 1020.7 1025.8 1022.5 1028.4 1023.3 1028.4 DAY 9 3 25 23 22 2 26 31 13 1 23 9 MIN. QNH PRESSURE IN HPA 1006.1 1012.1 1004.1 1002.8 1006.2 1004.4 1005.6 1007.2 1008.3 1006.4 1011.7 1011.0 1002.8 DAY 23 9 22 13 2 15 22 15 10 29 8 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 887.7 888.2 883.7 883.9 883.8 881.3 879.5 883.3 885.8 887.3 890.4 888.3 885.3 MAX. QFE PRESSURE IN HPA 895.9 895.6 890.0 888.7 891.5 888.6 882.2 889.9 894.1 891.9 897.5 892.8 897.5 DAY 9 3 2 22 21 2 31 25 13 14 23 20 MIN. QFE PRESSURE IN HPA 876.9 881.7 874.4 873.6 877.3 876.0 876.4 878.0 878.8 878.0 881.8 881.2 873.6 DAY 23 8 22 13 19 15 22 8 10 29 8 31 MEAN QNH PRESSURE IN HPA 1016.5 1017.0 1012.0 1012.3 1012.0 1009.3 1007.3 1011.5 1014.4 1016.1 1019.5 1017.1 1013.7 MAX. QNH PRESSURE IN HPA 1025.6 1025.3 1019.0 1017.6 1020.7 1017.5 1010.3 1018.9 1023.6 1021.1 1027.4 1022.1 1027.4 DAY 9 3 2 22 21 2 31 25 13 14 23 20 MIN. QNH PRESSURE IN HPA 1004.4 1009.8 1001.6 1000.7 1004.8 1003.4 1003.8 1005.6 1006.5 1005.6 1009.9 1009.2 1000.7 DAY 23 8 22 13 19 15 22 8 10 29 8 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 888.0 888.3 883.8 883.7 883.3 880.7 878.8 882.9 885.6 887.4 890.7 888.6 885.1 MAX. QFE PRESSURE IN HPA 896.0 895.9 889.7 888.5 891.7 887.7 881.6 889.3 894.3 892.4 897.5 892.6 897.5 DAY 9 3 12 24 21 3 31 30 13 14 23 10 MIN. QFE PRESSURE IN HPA 877.0 880.4 874.8 873.6 876.0 875.0 875.6 877.6 878.0 878.5 881.8 881.2 873.6 DAY 23 8 22 13 19 14 22 8 10 29 8 31 MEAN QNH PRESSURE IN HPA 1016.8 1017.1 1012.1 1012.0 1011.6 1008.7 1006.5 1011.1 1014.1 1016.1 1019.8 1017.4 1013.6 MAX. QNH PRESSURE IN HPA 1025.7 1025.6 1018.7 1017.3 1020.9 1016.5 1009.6 1018.2 1023.8 1021.7 1027.4 1021.9 1027.4 DAY 9 3 12 24 21 3 31 30 13 14 23 10 MIN. QNH PRESSURE IN HPA 1004.5 1008.3 1002.1 1000.7 1003.4 1002.3 1002.9 1005.2 1005.6 1006.2 1009.9 1009.2 1000.7 DAY 23 8 22 13 19 14 22 8 10 29 8 31 MEAN QFF PRESSURE IN HPA 1020.5 1019.4 1009.7 1008.1 1004.5 999.3 996.0 1001.7 1006.9 1010.9 1019.8 1018.1 1009.6 MAX. QFF PRESSURE IN HPA 1031.9 1029.5 1020.1 1016.4 1015.6 1009.8 1001.1 1010.9 1021.1 1016.9 1028.0 1023.1 1031.9 DAY 9 3 24 14 21 2 11 30 13 14 23 10 MIN. QFF PRESSURE IN HPA 1005.2 1009.3 998.8 998.2 994.9 991.5 991.0 994.6 996.3 1002.8 1006.3 1009.7 991.0 DAY 23 8 22 13 19 14 22 8 10 29 8 31 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.8 10.0 13.1 21.5 26.8 32.0 32.2 33.5 27.5 21.6 16.0 6.4 20.5 MINIMUN AIR TEMPERATURE (C) 0.1 2.9 6.2 13.5 18.2 23.1 24.1 24.9 18.9 13.0 9.0 1.1 12.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 9 24 28 31 11 0 0 0 103 DAYS WITH MINIMUM TEMP. <=-4 3 0 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH FREEZING MIN.<= 0 17 5 1 0 0 0 0 0 0 0 0 18 41 TEMPERATURE RECORDS LOWEST(C) -4.0 -2.0 0.0 5.0 11.0 16.0 18.0 22.0 11.0 7.0 4.0 -3.0 -4.0 DAY 28 1 17 25 8 12 6 15 20 24 30 16 MAXIMUM AIR TEMPERATURE (C) 8.7 15.1 17.7 26.7 31.8 36.8 37.3 38.5 32.7 26.6 21.3 11.1 25.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 8 19 28 31 31 22 9 0 0 148 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.0 20.0 29.0 31.0 38.0 43.0 42.0 41.0 38.0 34.0 27.0 20.0 43.0 DAY 22 19 31 6 27 30 14 4 3 1 8 7 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 12.2 11.5 13.2 13.6 13.7 13.2 13.6 13.8 13.6 12.3 10.0 12.5 MEAN DAILY TEMP. (MDT) (C) 4.4 9.0 12.0 20.1 25.0 29.9 30.7 31.7 25.8 19.8 15.2 6.1 19.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.5 26.5 130.5 268.5 301.5 332.0 150.5 30.5 0.0 0.0 1240.5 HEATING DEG. DAYS(BASE 18 0C) 421.5 252.0 190.5 22.0 0.0 0.0 0.0 0.0 0.0 20.5 90.0 369.0 1365.5 DEWPOINT (MEAN C) -2.0 -1.7 0.1 6.4 8.6 9.6 11.8 14.4 9.8 6.7 4.2 -0.5 5.6 MIXING RATIO (G/KG) 3.78 3.93 4.46 6.92 8.07 8.78 10.03 12.06 8.76 7.07 5.94 4.24 7.00 VAPOUR PRESSURE (HPA) 5.36 5.56 6.31 9.76 11.31 12.26 13.96 16.72 12.28 9.97 8.42 6.02 9.83 SATURATION DEF. (HPA) 3.47 7.19 9.61 17.16 25.80 37.32 35.85 36.45 26.19 17.18 10.54 4.08 19.24 RELATIVE HUMIDITY (MEAN %) 63 46 44 40 34 26 30 33 35 40 46 63 42 RELATIVE HUMIDITY (MAX. %) 77 61 58 53 48 38 43 46 46 50 56 77 54 RELATIVE HUMIDITY (MIN. %) 50 35 34 32 26 21 23 26 28 31 37 52 33 RELATIVE HUMIDITY (MEAN% 03UTC) 74 61 57 51 48 38 43 46 46 50 55 75 54 RELATIVE HUMIDITY (MEAN% 09UTC) 56 41 39 35 29 23 25 28 29 34 40 54 36 RELATIVE HUMIDITY (MEAN% 15UTC) 66 44 43 37 30 23 28 30 34 40 50 68 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 19.6 0.0 12.7 15.0 0.0 0.0 0.4 0.0 0.0 0.0 0.0 21.0 68.7 DAYS WITH PRECIPITATION >=10 1 0 1 1 0 0 0 0 0 0 0 1 4 DAYS WITH PRECIPITATION >= 5 1 0 1 1 0 0 0 0 0 0 0 1 4 DAYS WITH PRECIPITATION >= 1 5 0 2 2 0 0 0 0 0 0 0 4 13 DAYS WITH PRECIPITATION 8 0 5 3 3 0 1 0 0 0 1 4 25 GREATEST DAILY PRECIPITATION 11.0 0.0 11.0 11.0 0.0 0.0 0.4 0.0 0.0 0.0 0.0 11.0 11.0 DAY 23 ** 11 24 ** ** 6 ** ** ** ** 13 DAY WITH THUNDER STORM 0 0 0 0 1 0 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 1 2 DAYS WITH DUST 0 0 1 1 1 0 0 1 1 0 0 0 5 WIND DIRECTION (PREVAILING) 180 180 180 180 180 180 135 135 180 180 180 135 180 PREVAILING WIND SPEED(KNOTS) 5.6 5.8 4.9 5.2 5.8 4.9 5.5 5.8 4.4 6.0 5.2 4.7 5.3 PREVAILING WIND PERCENT 5.8 17.9 17.4 20.7 18.1 21.3 12.3 15.5 12.0 13.5 10.0 5.8 13.4 CALMS PERCENT OF WIND 80.0 55.0 50.3 30.7 36.8 35.3 42.6 51.6 50.7 56.8 66.7 81.9 53.3 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 207 184 213 201 202 168 66 129 57 207 188 214 184 VECTOR WIND MAGNITUDE(KNOTS) 0.3 1.2 1.2 1.6 2.0 1.1 1.0 1.3 0.2 1.4 1.0 0.2 0.8 WIND STEADINESES (MEAN %) 25.0 42.9 42.9 41.0 52.6 32.4 27.8 50.0 7.4 53.8 55.6 25.0 29.6 WIND SPEED (MEAN KNOTS) 1.2 2.8 2.8 3.9 3.8 3.4 3.6 2.6 2.7 2.6 1.8 0.8 2.7 FASTEST WIND DIRECTION 210 210 210 220 330 360 360 150 360 220 210 280 210 FASTEST WIND SPEED (KNOTS) 15 20 18 18 15 15 15 10 15 18 15 8 20 DAY 1 19 23 20 4 10 5 3 12 15 11 14 DAYS WITH SKY CLEAR (0-2)/8 12 16 12 12 21 29 27 31 30 30 19 19 258 DAYS WITH P.CLOUDY (3-6)/8 9 11 13 14 9 1 4 0 0 1 10 9 81 DAYS WITH CLOUDY (7-8)/8 10 1 6 4 1 0 0 0 0 0 1 3 26 DAYS WITH VISIBILITY =< 2 KM 1 0 0 0 0 0 0 0 0 0 0 0 1 DURATION OF SUNSHINE HOURS 144.9 203.6 189.1 229.6 302.9 357.6 314.5 344.6 297.1 302.5 228.5 191.3 3106.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 888.1 886.7 886.3 886.7 883.4 881.1 879.9 879.6 884.8 888.1 890.4 889.4 885.4 MAX. QFE PRESSURE IN HPA 897.3 893.4 894.5 894.3 890.8 888.9 885.5 887.3 892.2 896.0 900.1 898.3 900.1 DAY-HOUR 3- 6 6- 9 26- 6 13- 6 22- 6 11- 6 9- 6 30- 6 18- 6 12- 6 15- 6 30- 6 MIN. QFE PRESSURE IN HPA 878.0 876.7 876.7 872.5 877.2 874.8 873.4 873.7 877.2 878.0 884.8 880.4 872.5 DAY-HOUR 23- 3 23-15 19-15 19-15 20-15 8-15 14-15 6-15 8-12 8-12 11-12 9-12 MEAN QNH PRESSURE IN HPA 1016.9 1015.3 1014.9 1015.3 1011.7 1009.1 1007.7 1007.4 1013.2 1016.9 1019.5 1018.4 1013.8 MAX. QNH PRESSURE IN HPA 1027.2 1022.8 1024.0 1023.8 1019.9 1017.8 1014.0 1016.0 1021.5 1025.7 1030.3 1028.3 1030.3 DAY-HOUR 3- 6 6- 9 26- 6 13- 6 22- 6 11- 6 9- 6 30- 6 18- 6 12- 6 15- 6 30- 6 MIN. QNH PRESSURE IN HPA 1005.6 1004.2 1004.2 999.5 1004.7 1002.1 1000.5 1000.8 1004.7 1005.6 1013.2 1008.3 999.5 DAY-HOUR 23- 3 23-15 19-15 19-15 20-15 8-15 14-15 6-15 8-12 8-12 11-12 9-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 887.9 886.6 886.4 887.2 884.1 881.7 880.5 880.3 885.2 888.3 890.6 889.2 885.7 MAX. QFE PRESSURE IN HPA 895.4 891.8 893.3 893.0 889.3 887.8 884.5 886.8 890.8 894.7 899.1 896.6 899.1 DAY 3 16 26 13 22 11 9 30 18 12 15 31 MIN. QFE PRESSURE IN HPA 878.0 879.3 879.3 879.0 879.0 877.5 876.9 875.5 879.7 880.9 886.7 882.4 875.5 DAY 23 19 23 20 31 20 1 7 6 8 12 14 MEAN QNH PRESSURE IN HPA 1016.6 1015.2 1015.0 1015.8 1012.4 1009.8 1008.4 1008.2 1013.7 1017.1 1019.7 1018.1 1014.2 MAX. QNH PRESSURE IN HPA 1025.0 1021.0 1022.7 1022.4 1018.2 1016.6 1012.9 1015.4 1019.9 1024.3 1029.2 1026.4 1029.2 DAY 3 16 26 13 22 11 9 30 18 12 15 31 MIN. QNH PRESSURE IN HPA 1005.6 1007.1 1007.1 1006.7 1006.7 1005.1 1004.4 1002.8 1007.5 1008.9 1015.3 1010.5 1002.8 DAY 23 19 23 20 31 20 1 7 6 8 12 14 MEAN QFF PRESSURE IN HPA 1018.8 1015.4 1013.6 1010.6 1004.8 999.8 998.1 997.3 1005.9 1012.2 1017.3 1019.9 1009.5 MAX. QFF PRESSURE IN HPA 1028.1 1021.9 1022.8 1018.5 1012.5 1010.7 1003.5 1005.3 1014.7 1019.8 1028.0 1029.6 1029.6 DAY 3 7 26 13 10 11 9 30 19 27 15 16 MIN. QFF PRESSURE IN HPA 1006.5 1005.3 1003.7 999.2 996.4 994.1 992.3 990.8 997.3 1002.9 1012.4 1010.5 990.8 DAY 23 19 23 19 31 20 1 7 9 8 9 14 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 889.2 887.9 887.5 888.1 884.8 882.5 881.2 881.1 886.2 889.5 891.8 890.7 886.7 MAX. QFE PRESSURE IN HPA 897.3 893.2 894.5 894.3 890.8 888.9 885.5 887.3 892.2 896.0 900.1 898.3 900.1 DAY 3 16 26 13 22 11 9 30 18 12 15 30 MIN. QFE PRESSURE IN HPA 880.0 880.0 880.5 878.9 879.9 878.0 877.3 876.4 880.3 881.3 887.9 883.7 876.4 DAY 23 19 23 19 31 20 1 7 6 8 12 14 MEAN QNH PRESSURE IN HPA 1018.2 1016.7 1016.2 1016.9 1013.2 1010.6 1009.2 1009.1 1014.8 1018.4 1021.0 1019.8 1015.3 MAX. QNH PRESSURE IN HPA 1027.2 1022.6 1024.0 1023.8 1019.9 1017.8 1014.0 1016.0 1021.5 1025.7 1030.3 1028.3 1030.3 DAY 3 16 26 13 22 11 9 30 18 12 15 30 MIN. QNH PRESSURE IN HPA 1007.9 1007.9 1008.4 1006.6 1007.7 1005.6 1004.8 1003.8 1008.2 1009.3 1016.7 1012.0 1003.8 DAY 23 19 23 19 31 20 1 7 6 8 12 14 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 888.4 887.4 887.0 887.4 884.0 881.8 880.6 880.3 885.4 888.6 890.7 889.7 885.9 MAX. QFE PRESSURE IN HPA 895.6 893.4 893.5 893.2 890.1 888.1 884.8 885.7 891.2 895.0 898.8 897.3 898.8 DAY 3 6 26 13 22 11 22 30 18 12 14 16 MIN. QFE PRESSURE IN HPA 880.4 879.2 880.3 877.6 879.1 877.4 876.7 876.3 879.5 880.2 887.1 882.3 876.3 DAY 23 23 19 19 7 8 14 7 6 8 11 13 MEAN QNH PRESSURE IN HPA 1017.3 1016.2 1015.7 1016.1 1012.3 1009.9 1008.5 1008.2 1013.9 1017.4 1019.8 1018.7 1014.5 MAX. QNH PRESSURE IN HPA 1025.3 1022.8 1022.9 1022.6 1019.1 1016.9 1013.2 1014.2 1020.4 1024.6 1028.8 1027.2 1028.8 DAY 3 6 26 13 22 11 22 30 18 12 14 16 MIN. QNH PRESSURE IN HPA 1008.3 1007.0 1008.2 1005.2 1006.9 1005.0 1004.2 1003.7 1007.3 1008.1 1015.8 1010.4 1003.7 DAY 23 23 19 19 7 8 14 7 6 8 11 13 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 887.3 885.7 885.4 885.6 882.3 880.1 878.9 878.5 883.7 887.1 889.5 888.7 884.4 MAX. QFE PRESSURE IN HPA 894.3 891.1 891.5 890.7 888.3 886.2 882.7 883.5 890.4 892.9 898.2 896.2 898.2 DAY 2 6 26 12 22 11 8 30 18 12 14 30 MIN. QFE PRESSURE IN HPA 879.6 876.9 877.7 874.8 878.1 875.6 874.6 874.5 877.2 878.0 884.8 880.4 874.5 DAY 22 23 19 19 7 30 14 6 8 8 11 9 MEAN QNH PRESSURE IN HPA 1016.0 1014.3 1013.9 1014.1 1010.5 1008.0 1006.6 1006.2 1012.0 1015.7 1018.4 1017.5 1012.8 MAX. QNH PRESSURE IN HPA 1023.8 1020.2 1020.7 1019.8 1017.1 1014.8 1010.9 1011.8 1019.5 1022.3 1028.2 1025.9 1028.2 DAY 2 6 26 12 22 11 8 30 18 12 14 30 MIN. QNH PRESSURE IN HPA 1007.4 1004.4 1005.3 1002.1 1005.7 1002.9 1001.8 1001.7 1004.7 1005.6 1013.2 1008.3 1001.7 DAY 22 23 19 19 7 30 14 6 8 8 11 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 887.7 885.8 885.3 885.3 881.9 879.3 878.4 877.9 883.5 887.1 889.5 888.9 884.2 MAX. QFE PRESSURE IN HPA 894.6 891.4 890.7 891.2 887.7 885.7 882.2 883.6 890.4 892.9 898.8 896.6 898.8 DAY 2 6 26 12 22 11 8 29 18 11 14 30 MIN. QFE PRESSURE IN HPA 878.8 876.7 876.7 872.5 877.2 874.8 873.4 873.7 877.2 878.0 884.8 880.7 872.5 DAY 22 23 19 19 20 8 14 6 8 8 11 13 MEAN QNH PRESSURE IN HPA 1016.4 1014.3 1013.8 1013.8 1010.0 1007.1 1006.1 1005.5 1011.8 1015.7 1018.5 1017.8 1012.6 MAX. QNH PRESSURE IN HPA 1024.2 1020.6 1019.8 1020.4 1016.5 1014.2 1010.3 1011.9 1019.5 1022.3 1028.8 1026.4 1028.8 DAY 2 6 26 12 22 11 8 29 18 11 14 30 MIN. QNH PRESSURE IN HPA 1006.5 1004.2 1004.2 999.5 1004.7 1002.1 1000.5 1000.8 1004.7 1005.6 1013.2 1008.6 999.5 DAY 22 23 19 19 20 8 14 6 8 8 11 13 MEAN QFF PRESSURE IN HPA 1018.5 1014.3 1012.3 1008.4 1002.2 997.0 995.6 994.5 1003.9 1010.7 1016.1 1019.7 1007.8 MAX. QFF PRESSURE IN HPA 1027.5 1022.0 1019.6 1016.6 1010.1 1007.4 1001.4 1001.2 1013.8 1018.3 1027.6 1029.5 1029.5 DAY 2 3 25 26 9 11 8 29 18 27 14 16 MIN. QFF PRESSURE IN HPA 1007.4 1003.8 1000.5 991.5 995.0 990.1 988.2 988.9 994.7 1000.0 1009.3 1007.6 988.2 DAY 22 19 19 19 31 30 14 6 8 8 9 13 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.1 7.7 14.7 18.2 27.7 31.3 33.5 33.0 27.2 20.2 12.7 7.7 20.0 MINIMUN AIR TEMPERATURE (C) -0.2 1.0 7.3 10.4 19.0 22.6 24.4 24.1 17.9 11.6 6.9 2.0 12.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 5 23 29 31 7 0 0 0 95 DAYS WITH MINIMUM TEMP. <=-4 2 3 0 0 0 0 0 0 0 0 0 0 5 DAYS WITH FREEZING MIN.<= 0 19 11 1 0 0 0 0 0 0 0 0 10 41 TEMPERATURE RECORDS LOWEST(C) -5.0 -4.0 0.0 2.0 14.0 17.0 19.0 21.0 12.0 7.0 4.0 -3.0 -5.0 DAY 26 2 16 3 21 7 27 4 19 28 21 22 MAXIMUM AIR TEMPERATURE (C) 11.4 12.7 19.7 23.2 32.5 36.2 38.3 38.0 32.3 25.4 16.9 12.4 24.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 28 30 31 31 22 1 0 0 143 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 20.0 19.0 27.0 27.0 37.0 40.0 42.0 40.0 40.0 30.0 22.0 18.0 42.0 DAY 6 22 28 30 28 22 6 6 1 6 5 7 DIF. BETWEEN (MAX.-MIN.) (C) 11.6 11.7 12.4 12.8 13.5 13.6 13.9 13.9 14.4 13.8 10.0 10.4 12.7 MEAN DAILY TEMP. (MDT) (C) 5.6 6.8 13.5 16.8 25.7 29.4 31.3 31.0 25.1 18.5 11.9 7.2 18.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 147.0 251.5 319.5 311.5 125.0 4.0 0.0 0.0 1158.5 HEATING DEG. DAYS(BASE 18 0C) 384.0 312.5 145.5 52.0 0.0 0.0 0.0 0.0 0.0 18.5 183.5 334.5 1430.5 DEWPOINT (MEAN C) -2.7 -3.2 0.3 5.5 9.3 11.7 12.9 11.6 7.0 4.4 5.5 0.0 5.2 MIXING RATIO (G/KG) 3.62 3.51 4.58 6.58 8.40 10.19 10.88 9.86 7.27 5.99 6.51 4.41 6.82 VAPOUR PRESSURE (HPA) 5.16 4.96 6.48 9.24 11.77 14.15 15.13 13.75 10.24 8.48 9.22 6.25 9.57 SATURATION DEF. (HPA) 4.72 6.06 11.11 12.50 26.72 33.02 38.15 37.83 27.49 16.11 5.84 4.76 18.69 RELATIVE HUMIDITY (MEAN %) 55 48 40 46 33 32 30 28 29 37 64 61 42 RELATIVE HUMIDITY (MAX. %) 66 67 55 66 48 44 41 40 38 50 77 72 55 RELATIVE HUMIDITY (MIN. %) 46 36 29 33 25 25 24 22 23 28 55 50 33 RELATIVE HUMIDITY (MEAN% 03UTC) 64 66 54 64 47 44 41 40 37 49 76 70 54 RELATIVE HUMIDITY (MEAN% 09UTC) 48 41 33 39 29 28 26 24 25 30 58 52 36 RELATIVE HUMIDITY (MEAN% 15UTC) 58 43 38 41 28 28 26 25 27 37 65 64 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.1 15.0 6.2 15.5 6.4 4.0 0.0 0.0 0.0 4.1 31.2 6.6 89.1 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 0 1 1 1 0 0 0 0 0 0 3 0 6 DAYS WITH PRECIPITATION >= 1 0 4 2 6 2 1 0 0 0 1 6 3 25 DAYS WITH PRECIPITATION 1 4 3 8 5 1 0 0 0 2 9 6 39 GREATEST DAILY PRECIPITATION 0.1 12.0 5.0 5.0 4.0 4.0 0.0 0.0 0.0 4.0 9.2 4.0 12.0 DAY 15 13 30 13 21 19 ** ** ** 1 13 30 DAY WITH THUNDER STORM 0 0 0 0 0 1 0 0 0 0 0 0 1 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 1 2 DAYS WITH DUST 0 1 1 1 1 6 1 1 0 2 0 0 14 WIND DIRECTION (PREVAILING) 180 180 180 180 225 135 135 135 135 180 135 135 135 PREVAILING WIND SPEED(KNOTS) 5.3 4.9 5.4 6.5 9.9 5.6 5.2 5.1 6.9 7.9 6.0 5.1 5.6 PREVAILING WIND PERCENT 5.8 14.3 11.0 14.0 12.3 14.0 16.1 20.6 19.3 13.5 6.0 5.2 10.4 CALMS PERCENT OF WIND 80.0 64.3 67.1 54.7 60.0 50.0 38.1 47.1 40.7 51.6 81.3 78.1 59.4 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 176 218 219 190 206 128 162 142 179 193 194 196 188 VECTOR WIND MAGNITUDE(KNOTS) 0.2 1.4 0.9 1.7 1.9 0.9 0.1 1.3 1.1 1.5 0.2 0.5 0.9 WIND STEADINESES (MEAN %) 20.0 58.3 42.9 54.8 59.4 30.0 2.9 52.0 26.2 42.9 18.2 33.3 34.6 WIND SPEED (MEAN KNOTS) 1.0 2.4 2.1 3.1 3.2 3.0 3.5 2.5 4.2 3.5 1.1 1.5 2.6 FASTEST WIND DIRECTION 360 210 210 210 220 230 260 150 290 220 210 210 220 FASTEST WIND SPEED (KNOTS) 10 15 15 15 25 12 18 12 12 20 15 12 25 DAY 8 10 9 14 29 2 24 30 8 9 5 16 DAYS WITH SKY CLEAR (0-2)/8 20 20 13 14 19 30 30 31 30 29 14 12 262 DAYS WITH P.CLOUDY (3-6)/8 9 6 11 14 10 0 1 0 0 2 8 16 77 DAYS WITH CLOUDY (7-8)/8 2 2 7 2 2 0 0 0 0 0 8 3 26 DAYS WITH VISIBILITY =< 2 KM 0 0 1 0 1 2 0 1 0 0 1 1 7 DURATION OF SUNSHINE HOURS 224.4 212.0 166.0 232.0 265.3 293.0 346.7 320.7 316.4 301.8 178.1 190.8 3047.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 891.6 883.9 886.6 883.8 883.6 878.8 880.7 881.1 887.7 890.0 890.1 887.2 885.4 MAX. QFE PRESSURE IN HPA 900.2 891.9 893.3 891.8 890.7 884.4 885.7 886.2 894.8 899.4 899.0 895.4 900.2 DAY-HOUR 4- 6 4- 6 17- 6 28-15 3- 6 1- 6 26- 6 25- 6 24- 6 11- 6 20- 6 11- 6 MIN. QFE PRESSURE IN HPA 878.5 870.5 876.4 872.9 877.0 871.9 876.0 876.7 879.6 882.2 882.0 881.1 870.5 DAY-HOUR 14- 3 13-15 20-15 13-15 28-15 29-15 21-15 9-12 2-15 7-15 5-12 20- 3 MEAN QNH PRESSURE IN HPA 1020.8 1012.2 1015.2 1012.1 1011.9 1006.5 1008.6 1009.1 1016.4 1019.0 1019.1 1015.9 1013.9 MAX. QNH PRESSURE IN HPA 1030.4 1021.1 1022.7 1021.0 1019.8 1012.8 1014.2 1014.8 1024.4 1029.5 1029.1 1025.0 1030.4 DAY-HOUR 4- 6 4- 6 17- 6 28-15 3- 6 1- 6 26- 6 25- 6 24- 6 11- 6 20- 6 11- 6 MIN. QNH PRESSURE IN HPA 1006.2 997.3 1003.8 999.9 1004.5 998.8 1003.4 1004.2 1007.4 1010.3 1010.1 1009.1 997.3 DAY-HOUR 14- 3 13-15 20-15 13-15 28-15 29-15 21-15 9-12 2-15 7-15 5-12 20- 3 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 891.5 883.8 886.8 884.2 884.3 879.5 881.3 881.9 888.2 890.1 890.2 887.1 885.7 MAX. QFE PRESSURE IN HPA 898.6 889.6 892.2 890.8 889.6 883.9 885.0 885.6 894.4 897.9 897.5 893.6 898.6 DAY 3 16 17 29 3 9 26 26 24 11 20 11 MIN. QFE PRESSURE IN HPA 878.5 872.1 879.0 876.4 879.8 874.7 878.1 878.7 881.7 883.8 883.8 881.1 872.1 DAY 14 14 20 14 11 5 23 19 2 9 18 20 MEAN QNH PRESSURE IN HPA 1020.6 1012.1 1015.4 1012.5 1012.7 1007.3 1009.4 1010.0 1017.0 1019.1 1019.2 1015.8 1014.3 MAX. QNH PRESSURE IN HPA 1028.6 1018.6 1021.5 1019.9 1018.6 1012.2 1013.4 1014.1 1023.9 1027.8 1027.4 1023.0 1028.6 DAY 3 16 17 29 3 9 26 26 24 11 20 11 MIN. QNH PRESSURE IN HPA 1006.2 999.0 1006.7 1003.8 1007.6 1001.9 1005.7 1006.4 1009.8 1012.1 1012.1 1009.1 999.0 DAY 14 14 20 14 11 5 23 19 2 9 18 20 MEAN QFF PRESSURE IN HPA 1022.9 1013.2 1013.4 1008.6 1004.5 997.5 998.5 999.5 1009.4 1014.9 1017.9 1016.9 1009.8 MAX. QFF PRESSURE IN HPA 1029.7 1021.9 1021.1 1016.7 1011.7 1004.6 1003.9 1003.8 1018.7 1024.4 1027.3 1023.8 1029.7 DAY 3 2 3 21 3 20 26 26 24 11 20 11 MIN. QFF PRESSURE IN HPA 1007.7 1000.0 1001.5 1001.5 997.1 990.7 994.8 995.1 999.4 1005.1 1009.6 1010.5 990.7 DAY 14 14 20 18 29 29 9 19 2 1 18 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 893.1 885.4 887.8 885.0 885.0 880.2 882.0 882.5 889.1 891.3 891.2 888.4 886.8 MAX. QFE PRESSURE IN HPA 900.2 891.9 893.3 891.7 890.7 884.4 885.7 886.2 894.8 899.4 899.0 895.4 900.2 DAY 4 4 17 28 3 1 26 25 24 11 20 11 MIN. QFE PRESSURE IN HPA 880.6 875.5 879.5 877.7 880.0 875.4 878.8 878.9 882.2 885.2 884.3 881.3 875.4 DAY 14 14 20 14 11 5 22 19 2 7 18 20 MEAN QNH PRESSURE IN HPA 1022.5 1013.9 1016.6 1013.5 1013.4 1008.1 1010.0 1010.7 1018.0 1020.5 1020.4 1017.2 1015.4 MAX. QNH PRESSURE IN HPA 1030.4 1021.1 1022.7 1020.9 1019.8 1012.8 1014.2 1014.8 1024.4 1029.5 1029.1 1025.0 1030.4 DAY 4 4 17 28 3 1 26 25 24 11 20 11 MIN. QNH PRESSURE IN HPA 1008.5 1002.8 1007.3 1005.3 1007.9 1002.7 1006.5 1006.6 1010.3 1013.7 1012.7 1009.3 1002.7 DAY 14 14 20 14 11 5 22 19 2 7 18 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 891.9 884.7 887.2 884.3 884.2 879.5 881.3 881.8 888.3 890.5 890.4 887.4 886.0 MAX. QFE PRESSURE IN HPA 898.9 891.0 892.5 891.5 889.4 883.4 885.4 885.4 893.8 898.0 898.0 894.6 898.9 DAY 3 4 17 28 3 1 26 25 23 11 20 11 MIN. QFE PRESSURE IN HPA 879.5 876.7 878.8 877.2 879.9 874.5 878.1 878.2 881.8 884.0 883.6 881.2 874.5 DAY 14 8 20 14 11 5 21 19 2 9 5 20 MEAN QNH PRESSURE IN HPA 1021.2 1013.1 1015.9 1012.7 1012.6 1007.3 1009.3 1009.9 1017.1 1019.5 1019.5 1016.2 1014.5 MAX. QNH PRESSURE IN HPA 1029.0 1020.1 1021.8 1020.7 1018.4 1011.7 1013.9 1013.9 1023.3 1027.9 1027.9 1024.2 1029.0 DAY 3 4 17 28 3 1 26 25 23 11 20 11 MIN. QNH PRESSURE IN HPA 1007.3 1004.2 1006.5 1004.7 1007.7 1001.7 1005.7 1005.8 1009.9 1012.3 1011.9 1009.2 1001.7 DAY 14 8 20 14 11 5 21 19 2 9 5 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 890.7 882.9 885.5 882.9 882.4 877.8 879.6 880.0 886.6 888.9 889.3 886.4 884.4 MAX. QFE PRESSURE IN HPA 897.5 890.0 891.0 890.6 889.9 881.8 883.1 883.7 892.3 895.9 897.4 893.4 897.5 DAY 3 4 3 28 20 17 26 25 23 11 20 11 MIN. QFE PRESSURE IN HPA 880.3 872.4 877.5 875.7 878.2 872.7 876.5 876.7 880.0 882.6 882.0 882.1 872.4 DAY 14 13 20 13 28 5 22 9 2 6 5 30 MEAN QNH PRESSURE IN HPA 1019.8 1011.1 1014.0 1011.1 1010.5 1005.4 1007.4 1007.8 1015.2 1017.8 1018.3 1015.0 1012.8 MAX. QNH PRESSURE IN HPA 1027.4 1019.0 1020.1 1019.7 1018.9 1009.9 1011.3 1012.0 1021.6 1025.6 1027.3 1022.8 1027.4 DAY 3 4 3 28 20 17 26 25 23 11 20 11 MIN. QNH PRESSURE IN HPA 1008.2 999.4 1005.1 1003.1 1005.8 999.7 1003.9 1004.2 1007.9 1010.8 1010.1 1010.2 999.4 DAY 14 13 20 13 28 5 22 9 2 6 5 30 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 891.0 882.9 885.5 882.7 882.1 877.1 879.2 879.6 886.4 889.0 889.4 886.9 884.3 MAX. QFE PRESSURE IN HPA 898.3 890.2 891.2 891.8 888.7 881.5 882.6 883.3 892.2 895.4 897.1 893.4 898.3 DAY 3 4 2 28 20 17 25 21 23 11 20 11 MIN. QFE PRESSURE IN HPA 880.9 870.5 876.4 872.9 877.0 871.9 876.0 876.7 879.6 882.2 882.9 883.0 870.5 DAY 13 13 20 13 28 29 21 9 2 7 5 16 MEAN QNH PRESSURE IN HPA 1020.2 1011.1 1014.1 1010.9 1010.2 1004.6 1006.9 1007.4 1015.0 1017.9 1018.4 1015.6 1012.7 MAX. QNH PRESSURE IN HPA 1028.3 1019.2 1020.4 1021.0 1017.6 1009.5 1010.8 1011.5 1021.5 1025.0 1026.9 1022.8 1028.3 DAY 3 4 2 28 20 17 25 21 23 11 20 11 MIN. QNH PRESSURE IN HPA 1008.9 997.3 1003.8 999.9 1004.5 998.8 1003.4 1004.2 1007.4 1010.3 1011.1 1011.2 997.3 DAY 13 13 20 13 28 29 21 9 2 7 5 16 MEAN QFF PRESSURE IN HPA 1022.4 1012.1 1011.9 1006.9 1001.9 994.6 995.9 996.7 1007.3 1013.7 1016.9 1016.7 1008.1 MAX. QFF PRESSURE IN HPA 1028.8 1021.5 1021.1 1016.5 1009.4 1000.1 1001.2 1001.1 1015.2 1022.0 1026.6 1025.3 1028.8 DAY 3 15 22 28 20 17 25 21 23 11 20 31 MIN. QFF PRESSURE IN HPA 1010.6 997.7 999.0 995.6 993.9 987.0 992.2 993.0 996.9 1005.0 1008.6 1011.6 987.0 DAY 13 13 20 13 28 28 9 19 2 7 5 16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.7 1.8 9.8 19.7 20.6 29.3 32.5 28.3 26.8 23.0 13.9 3.2 17.5 MINIMUN AIR TEMPERATURE (C) -3.5 -3.7 4.0 11.9 13.4 21.1 23.9 20.7 19.4 15.1 6.7 -1.0 10.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 17 31 17 10 0 0 0 76 DAYS WITH MINIMUM TEMP. <=-4 15 16 0 0 0 0 0 0 0 0 0 10 41 DAYS WITH FREEZING MIN.<= 0 30 23 1 0 0 0 0 0 0 0 0 18 72 TEMPERATURE RECORDS LOWEST(C) -10.0 -9.0 0.0 6.0 7.0 16.0 21.0 15.0 13.0 8.0 4.0 -8.0 -10.0 DAY 21 2 21 3 10 8 12 25 19 31 12 27 MAXIMUM AIR TEMPERATURE (C) 4.4 6.2 13.7 24.5 25.1 34.4 37.5 34.1 33.6 28.5 19.0 7.2 22.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 5 29 31 31 27 14 0 0 139 DAYS WITH MAXIMUM TEMP. <= 0 4 1 0 0 0 0 0 0 0 0 0 0 5 TEMPERATURE RECORDS HIGHEST(C) 10.0 15.0 21.0 31.0 33.0 41.0 40.0 39.0 38.0 32.0 25.0 14.0 41.0 DAY 15 18 31 29 29 22 1 18 2 1 3 12 DIF. BETWEEN (MAX.-MIN.) (C) 7.9 9.9 9.7 12.6 11.7 13.3 13.6 13.4 14.2 13.4 12.3 8.2 11.7 MEAN DAILY TEMP. (MDT) (C) 0.5 1.3 8.9 18.2 19.2 27.8 30.7 27.4 26.5 21.8 12.8 3.1 16.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 11.0 30.0 203.0 300.0 198.5 166.0 44.0 0.0 0.0 952.5 HEATING DEG. DAYS(BASE 18 0C) 544.0 485.0 283.0 37.0 29.0 0.0 0.0 0.0 0.0 3.5 156.0 462.5 2000.0 DEWPOINT (MEAN C) -4.1 -6.7 1.7 6.0 8.1 10.8 11.4 9.1 7.6 6.7 -0.2 -2.9 4.0 MIXING RATIO (G/KG) 3.30 2.77 4.98 6.81 7.78 9.34 9.78 8.43 7.54 7.04 4.40 3.68 6.32 VAPOUR PRESSURE (HPA) 4.69 3.94 7.03 9.57 10.91 13.04 13.63 11.82 10.62 9.96 6.24 5.23 8.89 SATURATION DEF. (HPA) 1.93 3.45 5.67 14.48 14.58 29.25 36.79 28.18 26.12 19.11 10.23 2.78 16.05 RELATIVE HUMIDITY (MEAN %) 72 55 60 43 48 33 29 31 31 37 39 66 45 RELATIVE HUMIDITY (MAX. %) 82 71 77 57 66 48 42 42 41 48 50 80 59 RELATIVE HUMIDITY (MIN. %) 62 43 47 33 36 25 22 24 23 27 30 53 35 RELATIVE HUMIDITY (MEAN% 03UTC) 76 66 74 56 66 48 42 42 39 44 48 79 57 RELATIVE HUMIDITY (MEAN% 09UTC) 68 48 56 38 41 28 24 27 25 29 31 56 39 RELATIVE HUMIDITY (MEAN% 15UTC) 73 57 54 38 42 29 26 28 27 38 45 66 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 27.3 30.6 66.0 18.4 62.6 4.1 0.1 1.6 0.0 10.0 3.0 52.4 276.1 DAYS WITH PRECIPITATION >=10 1 2 2 1 2 0 0 0 0 0 0 1 9 DAYS WITH PRECIPITATION >= 5 2 2 4 1 3 0 0 0 0 2 0 2 16 DAYS WITH PRECIPITATION >= 1 8 5 7 3 7 1 0 0 0 2 1 4 38 DAYS WITH PRECIPITATION 9 5 12 3 14 8 1 6 0 2 1 7 68 GREATEST DAILY PRECIPITATION 10.0 16.0 23.0 14.0 25.0 1.0 0.1 0.6 0.0 5.0 3.0 41.0 41.0 DAY 20 9 23 25 10 17 15 24 ** 8 30 1 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 9 3 2 0 0 0 0 0 0 0 0 3 17 DAYS WITH DUST 0 1 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 180 315 180 180 180 315 135 315 180 135 315 135 135 PREVAILING WIND SPEED(KNOTS) 6.6 8.5 8.2 6.5 7.4 8.3 6.1 7.6 6.5 5.6 6.1 5.0 5.9 PREVAILING WIND PERCENT 5.2 6.9 8.4 11.3 6.5 8.0 5.2 7.6 5.7 5.7 5.3 3.2 5.2 CALMS PERCENT OF WIND 83.9 73.1 67.7 68.7 74.2 74.0 85.2 75.6 75.2 79.0 86.7 89.7 77.7 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 172 210 176 150 155 1928 VECTOR WIND DIRECTION (MEAN) 217 278 192 175 222 271 169 353 212 224 264 183 218 VECTOR WIND MAGNITUDE(KNOTS) 0.5 0.6 0.9 1.0 0.5 0.3 0.3 0.8 0.4 0.3 0.3 0.2 0.3 WIND STEADINESES (MEAN %) 45.5 33.3 40.9 47.6 25.0 15.8 33.3 50.0 25.0 21.4 37.5 40.0 20.0 WIND SPEED (MEAN KNOTS) 1.1 1.8 2.2 2.1 2.0 1.9 0.9 1.6 1.6 1.4 0.8 0.5 1.5 FASTEST WIND DIRECTION 350 330 220 120 220 330 310 320 210 210 320 210 320 FASTEST WIND SPEED (KNOTS) 12 15 15 12 15 15 10 18 10 15 10 8 18 DAY 30 20 5 11 2 3 14 17 10 30 8 5 DAYS WITH SKY CLEAR (0-2)/8 9 17 9 9 7 17 26 22 29 23 20 12 200 DAYS WITH P.CLOUDY (3-6)/8 11 8 13 18 20 12 5 9 1 8 8 12 125 DAYS WITH CLOUDY (7-8)/8 11 4 9 3 4 1 0 0 0 0 2 7 41 DAYS WITH VISIBILITY =< 2 KM 1 2 1 0 0 0 0 0 0 0 0 1 5 DURATION OF SUNSHINE HOURS 137.4 215.5 182.4 249.5 244.1 315.2 335.0 323.4 312.5 277.4 235.8 159.5 2987.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 889.7 890.1 885.8 885.3 883.9 882.4 881.0 884.8 887.0 890.4 889.9 891.2 886.8 MAX. QFE PRESSURE IN HPA 900.3 898.7 894.2 892.4 893.9 889.9 886.2 890.5 894.0 898.6 896.2 899.2 900.3 DAY-HOUR 5- 6 23- 6 16- 6 16- 6 24- 6 1- 6 25- 6 8- 6 18- 6 26- 6 24- 6 28- 6 MIN. QFE PRESSURE IN HPA 882.2 882.9 873.7 877.5 872.9 873.8 872.1 873.1 880.1 883.3 883.2 881.9 872.1 DAY-HOUR 14-12 15- 3 18- 3 24-15 6-12 30-15 31-15 1- 3 10-12 30-12 7-15 16-12 MEAN QNH PRESSURE IN HPA 1018.6 1019.2 1014.3 1013.8 1012.2 1010.5 1008.9 1013.2 1015.7 1019.5 1018.9 1020.3 1015.4 MAX. QNH PRESSURE IN HPA 1030.5 1028.7 1023.7 1021.7 1023.4 1018.9 1014.8 1019.6 1023.5 1028.6 1025.9 1029.3 1030.5 DAY-HOUR 5- 6 23- 6 16- 6 16- 6 24- 6 1- 6 25- 6 8- 6 18- 6 26- 6 24- 6 28- 6 MIN. QNH PRESSURE IN HPA 1010.3 1011.1 1000.8 1005.1 999.9 1000.9 999.0 1000.2 1008.0 1011.5 1011.4 1010.0 999.0 DAY-HOUR 14-12 15- 3 18- 3 24-15 6-12 30-15 31-15 1- 3 10-12 30-12 7-15 16-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1006.9 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1016.5 ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** 18- 6 **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 997.8 ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** 10-12 **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 886.8 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 892.0 ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** 17 ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 881.5 ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** 14 ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1015.5 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1021.3 ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** 17 ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1009.5 ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** 14 ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1006.4 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1012.6 ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** 22 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 999.8 ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** 10 ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 889.5 889.9 885.8 885.6 884.3 883.1 881.6 885.2 887.4 890.7 889.9 890.8 887.0 MAX. QFE PRESSURE IN HPA 899.3 897.1 894.0 891.9 893.0 889.6 885.3 889.9 892.3 897.8 894.7 897.1 899.3 DAY 5 23 16 16 23 1 25 25 18 26 12 28 MIN. QFE PRESSURE IN HPA 882.6 882.9 873.7 878.6 875.2 876.6 876.6 873.1 881.8 885.8 884.0 883.6 873.1 DAY 23 15 18 25 6 24 5 1 10 30 8 17 MEAN QNH PRESSURE IN HPA 1018.4 1019.0 1014.3 1014.1 1012.7 1011.3 1009.6 1013.6 1016.1 1019.8 1018.9 1020.0 1015.7 MAX. QNH PRESSURE IN HPA 1029.4 1026.9 1023.5 1021.1 1022.4 1018.6 1013.8 1018.9 1021.6 1027.7 1024.3 1026.9 1029.4 DAY 5 23 16 16 23 1 25 25 18 26 12 28 MIN. QNH PRESSURE IN HPA 1010.8 1011.1 1000.8 1006.3 1002.5 1004.1 1004.1 1000.2 1009.9 1014.3 1012.3 1011.9 1000.2 DAY 23 15 18 25 6 24 5 1 10 30 8 17 MEAN QFF PRESSURE IN HPA 1022.9 1023.2 1014.0 1009.4 1007.4 1002.3 999.1 1004.7 1007.9 1014.0 1017.5 1023.0 1012.1 MAX. QFF PRESSURE IN HPA 1033.6 1033.4 1022.6 1018.1 1017.6 1010.7 1004.4 1012.6 1014.1 1022.1 1024.2 1033.4 1033.6 DAY 5 23 16 16 23 1 17 25 22 26 24 28 MIN. QFF PRESSURE IN HPA 1014.2 1013.2 999.8 1001.3 996.5 993.0 992.5 988.9 1000.7 1008.4 1008.8 1013.4 988.9 DAY 15 20 18 25 6 23 5 1 10 30 4 1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 891.0 891.3 887.0 886.6 885.0 883.6 882.2 885.9 888.4 891.8 891.0 892.4 888.0 MAX. QFE PRESSURE IN HPA 900.3 898.7 894.2 892.4 893.9 889.9 886.2 890.5 894.0 898.6 896.2 899.2 900.3 DAY 5 23 16 16 24 1 25 8 18 26 24 28 MIN. QFE PRESSURE IN HPA 883.6 884.3 873.9 879.8 874.6 877.0 877.3 874.1 882.6 886.4 885.6 884.8 873.9 DAY 14 15 18 25 6 30 4 1 10 30 8 16 MEAN QNH PRESSURE IN HPA 1020.1 1020.4 1015.6 1015.2 1013.4 1011.8 1010.3 1014.5 1017.3 1021.0 1020.1 1021.7 1016.8 MAX. QNH PRESSURE IN HPA 1030.5 1028.7 1023.7 1021.7 1023.4 1018.9 1014.8 1019.6 1023.5 1028.6 1025.9 1029.3 1030.5 DAY 5 23 16 16 24 1 25 8 18 26 24 28 MIN. QNH PRESSURE IN HPA 1011.9 1012.7 1001.0 1007.6 1001.8 1004.5 1004.8 1001.3 1010.8 1015.0 1014.1 1013.2 1001.0 DAY 14 15 18 25 6 30 4 1 10 30 8 16 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1008.6 1013.8 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1016.5 1018.1 ****** ****** ****** DAY ** ** ** ** ** ** ** ** 18 10 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1001.1 1010.1 ****** ****** ****** DAY ** ** ** ** ** ** ** ** 10 17 ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 890.0 890.7 886.5 886.0 884.4 882.9 881.5 885.2 887.7 891.0 890.3 891.8 887.3 MAX. QFE PRESSURE IN HPA 898.1 898.4 894.1 891.6 893.2 889.3 885.6 889.9 892.5 897.2 895.3 898.6 898.6 DAY 5 23 28 16 24 1 25 8 17 26 9 28 MIN. QFE PRESSURE IN HPA 882.5 884.4 874.1 879.8 874.0 876.1 875.9 874.1 881.9 884.7 885.1 884.3 874.0 DAY 14 15 18 25 6 30 31 1 10 30 8 16 MEAN QNH PRESSURE IN HPA 1019.0 1019.8 1015.1 1014.5 1012.8 1011.1 1009.6 1013.7 1016.5 1020.1 1019.4 1021.0 1016.0 MAX. QNH PRESSURE IN HPA 1028.1 1028.4 1023.6 1020.8 1022.6 1018.2 1014.1 1018.9 1021.8 1027.1 1024.9 1028.6 1028.6 DAY 5 23 28 16 24 1 25 8 17 26 9 28 MIN. QNH PRESSURE IN HPA 1010.6 1012.8 1001.3 1007.6 1001.2 1003.5 1003.3 1001.3 1010.0 1013.1 1013.6 1012.7 1001.2 DAY 14 15 18 25 6 30 31 1 10 30 8 16 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 888.8 889.4 884.9 884.4 883.1 881.5 880.1 883.7 886.0 889.4 888.9 890.3 885.9 MAX. QFE PRESSURE IN HPA 896.6 897.6 892.5 889.6 891.2 887.8 885.1 889.6 891.0 895.2 893.6 896.1 897.6 DAY 5 23 15 16 23 1 15 24 17 26 24 27 MIN. QFE PRESSURE IN HPA 882.2 883.5 874.5 878.5 872.9 874.3 873.6 874.3 880.1 883.3 883.6 881.9 872.9 DAY 14 15 18 24 6 30 31 1 10 30 7 16 MEAN QNH PRESSURE IN HPA 1017.7 1018.3 1013.3 1012.8 1011.3 1009.5 1008.0 1012.0 1014.6 1018.4 1017.8 1019.4 1014.4 MAX. QNH PRESSURE IN HPA 1026.4 1027.5 1021.8 1018.6 1020.4 1016.6 1013.6 1018.6 1020.1 1024.8 1023.0 1025.8 1027.5 DAY 5 23 15 16 23 1 15 24 17 26 24 27 MIN. QNH PRESSURE IN HPA 1010.3 1011.8 1001.7 1006.2 999.9 1001.5 1000.7 1001.5 1008.0 1011.5 1011.9 1010.0 999.9 DAY 14 15 18 24 6 30 31 1 10 30 7 16 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1005.4 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1011.7 ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** 21 ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 997.8 ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** 10 ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 889.1 889.5 885.0 884.0 882.8 880.9 879.5 883.3 885.8 889.5 889.2 890.5 885.8 MAX. QFE PRESSURE IN HPA 897.0 896.4 893.1 889.2 890.9 886.8 883.6 889.1 891.3 895.0 893.6 896.1 897.0 DAY 4 23 15 7 23 17 14 24 17 25 24 27 MIN. QFE PRESSURE IN HPA 882.2 884.4 874.5 877.5 872.9 873.8 872.1 874.9 880.2 885.1 883.2 881.9 872.1 DAY 22 15 18 24 6 30 31 1 10 30 7 16 MEAN QNH PRESSURE IN HPA 1018.0 1018.5 1013.4 1012.3 1010.9 1008.9 1007.3 1011.6 1014.4 1018.5 1018.1 1019.6 1014.3 MAX. QNH PRESSURE IN HPA 1026.8 1026.2 1022.5 1018.1 1020.0 1015.4 1011.9 1018.0 1020.5 1024.6 1023.0 1025.8 1026.8 DAY 4 23 15 7 23 17 14 24 17 25 24 27 MIN. QNH PRESSURE IN HPA 1010.3 1012.8 1001.7 1005.1 999.9 1000.9 999.0 1002.2 1008.1 1013.6 1011.4 1010.0 999.0 DAY 22 15 18 24 6 30 31 1 10 30 7 16 MEAN QFF PRESSURE IN HPA 1022.4 1022.5 1013.0 1007.4 1005.6 999.7 996.8 1002.5 1006.1 1012.6 1016.7 1022.7 1010.7 MAX. QFF PRESSURE IN HPA 1031.3 1032.9 1021.9 1014.7 1014.8 1007.1 1003.1 1010.2 1012.5 1018.8 1022.5 1032.5 1032.9 DAY 4 1 20 16 23 1 16 24 17 25 24 27 MIN. QFF PRESSURE IN HPA 1013.5 1013.0 1001.6 999.0 994.7 989.8 988.4 993.1 999.2 1008.1 1008.8 1013.0 988.4 DAY 14 18 18 24 6 30 31 1 10 30 7 16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 886.9 889.9 ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 892.0 892.2 ****** ****** ****** DAY ** ** ** ** ** ** ** ** 17 10 ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 881.1 886.9 ****** ****** ****** DAY ** ** ** ** ** ** ** ** 11 16 ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1015.5 1018.9 ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1021.3 1021.5 ****** ****** ****** DAY ** ** ** ** ** ** ** ** 17 10 ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1009.1 1015.6 ****** ****** ****** DAY ** ** ** ** ** ** ** ** 11 16 ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1007.0 1012.2 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1013.1 1016.8 ****** ****** ****** DAY ** ** ** ** ** ** ** ** 17 10 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1000.1 1008.5 ****** ****** ****** DAY ** ** ** ** ** ** ** ** 10 16 ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.5 9.0 12.5 18.8 25.1 32.1 33.8 32.8 26.3 22.1 12.0 5.7 19.3 MINIMUN AIR TEMPERATURE (C) -4.0 2.6 5.5 10.2 16.1 22.5 24.7 24.0 18.6 14.3 4.6 -0.9 11.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 21 31 28 9 0 0 0 91 DAYS WITH MINIMUM TEMP. <=-4 21 1 0 0 0 0 0 0 0 0 0 5 27 DAYS WITH FREEZING MIN.<= 0 30 8 2 0 0 0 0 0 0 0 7 22 69 TEMPERATURE RECORDS LOWEST(C) -9.0 -7.0 -2.0 6.0 10.0 17.0 21.0 19.0 9.0 9.0 -1.0 -5.0 -9.0 DAY 2 7 10 11 6 5 20 9 27 31 7 14 MAXIMUM AIR TEMPERATURE (C) 6.0 13.4 17.1 23.7 29.9 36.8 38.6 37.9 31.3 26.9 16.9 10.5 24.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 17 30 30 30 21 8 0 0 139 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 11.0 20.0 23.0 31.0 36.0 42.0 44.0 41.0 36.0 32.0 25.0 16.0 44.0 DAY 15 20 21 28 30 27 30 2 4 8 3 3 DIF. BETWEEN (MAX.-MIN.) (C) 10.0 10.8 11.6 13.5 13.8 14.3 13.9 13.9 12.7 12.6 12.3 11.4 12.6 MEAN DAILY TEMP. (MDT) (C) 1.0 8.0 11.3 16.9 23.0 29.7 31.7 31.0 24.9 20.6 10.7 4.8 17.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 7.5 74.0 260.0 331.0 299.5 121.0 30.0 0.0 0.0 1123.0 HEATING DEG. DAYS(BASE 18 0C) 526.5 280.0 209.0 59.0 0.0 0.0 0.0 0.0 4.0 7.5 218.5 409.5 1714.0 DEWPOINT (MEAN C) -8.3 0.3 0.8 2.7 6.1 9.8 13.4 10.6 7.3 4.7 -2.9 -5.1 3.3 MIXING RATIO (G/KG) 2.38 4.62 4.76 5.37 6.86 8.86 11.27 9.19 7.37 6.15 3.62 3.06 6.13 VAPOUR PRESSURE (HPA) 3.39 6.53 6.72 7.56 9.63 12.36 15.63 12.87 10.37 8.69 5.14 4.35 8.60 SATURATION DEF. (HPA) 3.67 5.64 8.45 15.37 23.40 37.22 38.73 38.44 25.36 18.93 9.75 5.23 19.18 RELATIVE HUMIDITY (MEAN %) 50 57 47 36 32 27 31 27 31 33 37 48 38 RELATIVE HUMIDITY (MAX. %) 65 71 63 51 48 39 44 41 40 41 46 58 51 RELATIVE HUMIDITY (MIN. %) 38 47 36 27 23 21 24 20 25 27 30 40 30 RELATIVE HUMIDITY (MEAN% 03UTC) 65 70 61 49 48 39 42 41 40 41 46 56 50 RELATIVE HUMIDITY (MEAN% 09UTC) 42 50 41 31 27 23 27 22 27 29 33 43 33 RELATIVE HUMIDITY (MEAN% 15UTC) 47 55 42 32 26 22 27 22 29 33 36 50 35 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 8.2 24.8 13.5 7.3 0.0 0.0 0.6 0.0 0.0 0.0 0.0 6.1 60.5 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 1 2 1 0 0 0 0 0 0 0 0 1 5 DAYS WITH PRECIPITATION >= 1 2 5 4 3 0 0 0 0 0 0 0 1 15 DAYS WITH PRECIPITATION 2 5 6 4 0 0 1 0 0 0 0 4 22 GREATEST DAILY PRECIPITATION 7.0 15.4 7.0 3.0 0.0 0.0 0.6 0.0 0.0 0.0 0.0 5.0 15.4 DAY 16 22 4 1 ** ** 19 ** ** ** ** 30 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 1 1 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 135 225 225 180 180 135 135 225 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 8.0 6.0 7.9 9.6 7.9 7.5 6.2 5.8 7.0 10.2 8.7 8.5 9.0 PREVAILING WIND PERCENT 3.2 3.6 6.5 15.3 11.6 7.3 9.0 7.3 15.6 15.5 14.0 16.8 6.6 CALMS PERCENT OF WIND 91.0 86.4 78.7 57.3 67.7 78.0 75.5 77.3 48.1 56.1 64.0 74.2 71.4 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 150 135 155 150 155 1805 VECTOR WIND DIRECTION (MEAN) 215 228 217 221 189 160 105 64 276 296 292 322 237 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.3 0.7 2.6 1.5 0.8 0.7 0.6 1.0 1.0 1.2 1.3 0.5 WIND STEADINESES (MEAN %) 42.9 25.0 38.9 70.3 57.7 53.3 46.7 40.0 25.0 29.4 38.7 65.0 21.7 WIND SPEED (MEAN KNOTS) 0.7 1.2 1.8 3.7 2.6 1.5 1.5 1.5 4.0 3.4 3.1 2.0 2.3 FASTEST WIND DIRECTION 240 320 330 220 210 160 130 40 360 360 210 330 210 FASTEST WIND SPEED (KNOTS) 15 20 15 20 15 12 10 10 20 20 25 20 25 DAY 16 6 29 17 18 1 1 5 10 30 19 7 DAYS WITH SKY CLEAR (0-2)/8 18 14 12 16 25 28 24 29 27 30 22 19 264 DAYS WITH P.CLOUDY (3-6)/8 10 12 15 12 6 2 6 1 0 1 7 10 82 DAYS WITH CLOUDY (7-8)/8 3 2 4 2 0 0 1 0 0 0 1 2 15 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 0 0 DURATION OF SUNSHINE HOURS 214.4 188.1 224.5 266.6 322.5 364.0 339.2 337.3 283.6 298.0 247.0 231.7 3316.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 890.6 886.3 885.9 883.3 883.4 880.6 878.6 883.4 885.5 888.3 888.4 889.6 885.3 MAX. QFE PRESSURE IN HPA 903.0 896.1 897.5 891.5 892.6 887.6 884.5 887.9 893.8 894.0 896.3 899.5 903.0 DAY-HOUR 26- 6 7- 6 10- 6 11- 6 8- 6 3- 6 23- 6 22- 6 29- 6 6- 6 12- 6 26- 6 MIN. QFE PRESSURE IN HPA 875.0 868.4 877.7 877.0 875.6 872.0 871.8 878.7 878.4 882.7 880.7 880.0 868.4 DAY-HOUR 16- 3 22-15 22-12 8-15 30-15 15-15 10-15 2-12 9-15 30- 3 19-12 7-12 MEAN QNH PRESSURE IN HPA 1019.6 1014.9 1014.5 1011.5 1011.6 1008.5 1006.2 1011.7 1014.0 1017.1 1017.2 1018.6 1013.8 MAX. QNH PRESSURE IN HPA 1033.5 1025.8 1027.4 1020.7 1021.9 1016.3 1012.9 1016.7 1023.3 1023.5 1026.0 1029.6 1033.5 DAY-HOUR 26- 6 7- 6 10- 6 11- 6 8- 6 3- 6 23- 6 22- 6 29- 6 6- 6 12- 6 26- 6 MIN. QNH PRESSURE IN HPA 1002.3 994.9 1005.3 1004.5 1002.9 998.9 998.7 1006.4 1006.1 1010.9 1008.6 1007.9 994.9 DAY-HOUR 16- 3 22-15 22-12 8-15 30-15 15-15 10-15 2-12 9-15 30- 3 19-12 7-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 890.5 886.1 886.1 883.8 884.1 881.1 879.3 884.2 886.0 888.6 888.5 889.6 885.7 MAX. QFE PRESSURE IN HPA 901.6 894.9 896.4 890.8 892.2 886.8 884.3 887.3 892.8 893.8 895.3 898.9 901.6 DAY 26 7 10 11 8 3 23 22 27 23 12 27 MIN. QFE PRESSURE IN HPA 875.0 871.6 877.8 878.5 877.7 874.5 873.9 881.2 881.4 882.7 882.1 880.2 871.6 DAY 16 23 7 19 30 16 11 4 5 30 5 7 MEAN QNH PRESSURE IN HPA 1019.5 1014.7 1014.7 1012.1 1012.5 1009.1 1007.0 1012.6 1014.6 1017.5 1017.4 1018.6 1014.2 MAX. QNH PRESSURE IN HPA 1032.0 1024.5 1026.2 1019.9 1021.5 1015.4 1012.7 1016.0 1022.1 1023.3 1024.9 1029.0 1032.0 DAY 26 7 10 11 8 3 23 22 27 23 12 27 MIN. QNH PRESSURE IN HPA 1002.3 998.5 1005.4 1006.2 1005.3 1001.7 1001.0 1009.2 1009.4 1010.9 1010.2 1008.1 998.5 DAY 16 23 7 19 30 16 11 4 5 30 5 7 MEAN QFF PRESSURE IN HPA 1023.8 1015.1 1013.3 1008.0 1005.5 998.8 995.9 1001.9 1007.2 1012.1 1016.8 1021.0 1010.0 MAX. QFF PRESSURE IN HPA 1038.0 1030.4 1029.6 1018.0 1016.0 1006.5 1001.3 1005.3 1017.8 1018.4 1025.4 1032.0 1038.0 DAY 26 7 10 11 8 3 23 22 27 23 12 27 MIN. QFF PRESSURE IN HPA 1003.5 998.8 1003.1 1000.7 995.7 989.8 989.5 997.3 1000.2 1006.3 1006.1 1008.8 989.5 DAY 16 23 7 28 30 15 11 4 5 11 5 7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 892.0 887.4 887.3 884.8 884.8 881.9 879.8 884.8 887.0 889.5 889.6 890.7 886.6 MAX. QFE PRESSURE IN HPA 903.0 896.1 897.5 891.5 892.6 887.6 884.5 887.9 893.8 894.0 896.3 899.5 903.0 DAY 26 7 10 11 8 3 23 22 29 6 12 26 MIN. QFE PRESSURE IN HPA 876.8 873.9 879.1 880.6 878.1 874.9 874.6 881.7 882.0 883.8 883.6 880.8 873.9 DAY 16 22 7 28 30 15 11 4 5 30 5 7 MEAN QNH PRESSURE IN HPA 1021.2 1016.1 1016.0 1013.2 1013.3 1010.0 1007.6 1013.2 1015.6 1018.5 1018.5 1019.8 1015.2 MAX. QNH PRESSURE IN HPA 1033.5 1025.8 1027.4 1020.7 1021.9 1016.3 1012.9 1016.7 1023.3 1023.5 1026.0 1029.6 1033.5 DAY 26 7 10 11 8 3 23 22 29 6 12 26 MIN. QNH PRESSURE IN HPA 1004.3 1001.0 1006.9 1008.5 1005.7 1002.2 1001.8 1009.8 1010.1 1012.1 1011.9 1008.7 1001.0 DAY 16 22 7 28 30 15 11 4 5 30 5 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 891.2 887.0 886.7 883.8 883.9 881.3 879.2 883.9 886.1 888.6 888.7 890.1 885.9 MAX. QFE PRESSURE IN HPA 902.3 895.6 897.2 890.8 891.8 886.7 883.9 886.6 893.1 893.0 896.1 899.1 902.3 DAY 25 7 10 11 8 3 22 21 29 22 12 26 MIN. QFE PRESSURE IN HPA 877.5 872.7 878.6 879.3 877.4 874.0 874.3 880.8 880.7 882.8 882.7 880.3 872.7 DAY 16 22 7 28 30 15 10 4 5 30 5 7 MEAN QNH PRESSURE IN HPA 1020.4 1015.7 1015.3 1012.1 1012.2 1009.3 1007.0 1012.2 1014.6 1017.5 1017.6 1019.1 1014.4 MAX. QNH PRESSURE IN HPA 1032.7 1025.3 1027.1 1019.9 1021.0 1015.3 1012.2 1015.2 1022.5 1022.4 1025.8 1029.2 1032.7 DAY 25 7 10 11 8 3 22 21 29 22 12 26 MIN. QNH PRESSURE IN HPA 1005.1 999.7 1006.3 1007.1 1005.0 1001.2 1001.5 1008.7 1008.6 1011.0 1010.9 1008.2 999.7 DAY 16 22 7 28 30 15 10 4 5 30 5 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 889.5 885.5 884.9 882.1 882.2 879.6 877.6 882.4 884.5 887.3 887.5 888.8 884.3 MAX. QFE PRESSURE IN HPA 900.3 893.0 895.2 888.7 890.4 885.0 882.6 885.4 891.2 892.9 895.0 897.9 900.3 DAY 25 7 10 11 7 2 22 21 29 22 12 26 MIN. QFE PRESSURE IN HPA 877.7 869.3 877.7 877.7 876.1 872.2 873.1 878.7 879.4 882.8 880.7 880.0 869.3 DAY 16 22 22 28 30 15 10 2 5 30 19 7 MEAN QNH PRESSURE IN HPA 1018.5 1014.0 1013.4 1010.2 1010.3 1007.4 1005.2 1010.5 1012.9 1016.0 1016.2 1017.7 1012.7 MAX. QNH PRESSURE IN HPA 1030.5 1022.4 1024.8 1017.6 1019.5 1013.4 1010.8 1013.9 1020.4 1022.3 1024.6 1027.8 1030.5 DAY 25 7 10 11 7 2 22 21 29 22 12 26 MIN. QNH PRESSURE IN HPA 1005.3 995.9 1005.3 1005.3 1003.5 999.1 1000.2 1006.4 1007.2 1011.0 1008.6 1007.9 995.9 DAY 16 22 22 28 30 15 10 2 5 30 19 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 889.7 885.7 884.8 881.9 881.9 878.9 876.9 881.8 884.2 887.3 887.7 888.9 884.1 MAX. QFE PRESSURE IN HPA 900.7 892.5 894.6 888.7 891.2 884.4 881.8 884.5 890.8 893.1 894.7 898.4 900.7 DAY 25 7 10 11 7 2 22 6 29 22 12 26 MIN. QFE PRESSURE IN HPA 878.5 868.4 877.7 877.0 875.6 872.0 871.8 878.8 878.4 883.3 881.4 880.8 868.4 DAY 16 22 22 8 30 15 10 4 9 30 19 7 MEAN QNH PRESSURE IN HPA 1018.7 1014.2 1013.2 1010.0 1009.9 1006.7 1004.4 1009.8 1012.5 1016.0 1016.4 1017.8 1012.5 MAX. QNH PRESSURE IN HPA 1031.0 1021.8 1024.2 1017.6 1020.4 1012.8 1009.9 1012.9 1019.9 1022.5 1024.3 1028.4 1031.0 DAY 25 7 10 11 7 2 22 6 29 22 12 26 MIN. QNH PRESSURE IN HPA 1006.2 994.9 1005.3 1004.5 1002.9 998.9 998.7 1006.5 1006.1 1011.5 1009.4 1008.7 994.9 DAY 16 22 22 8 30 15 10 4 9 30 19 7 MEAN QFF PRESSURE IN HPA 1022.9 1014.4 1011.8 1005.7 1002.9 996.3 993.1 999.2 1004.8 1010.4 1015.9 1020.2 1008.1 MAX. QFF PRESSURE IN HPA 1037.1 1027.0 1027.0 1016.4 1015.1 1004.0 998.5 1002.3 1015.7 1017.0 1024.2 1031.3 1037.1 DAY 25 7 10 12 7 2 22 22 29 22 12 26 MIN. QFF PRESSURE IN HPA 1008.4 994.1 1000.6 998.0 993.4 987.4 986.6 994.5 997.0 1005.3 1005.3 1009.5 986.6 DAY 16 22 22 28 30 15 10 4 9 10 3 7 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.2 2.7 12.9 17.1 25.8 30.9 31.6 30.2 25.9 18.5 13.9 4.0 17.9 MINIMUN AIR TEMPERATURE (C) -2.2 -1.4 7.3 10.2 17.5 22.4 23.9 22.4 18.4 10.0 7.0 -0.5 11.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 9 24 25 23 4 0 0 0 85 DAYS WITH MINIMUM TEMP. <=-4 6 8 0 0 0 0 0 0 0 0 0 7 21 DAYS WITH FREEZING MIN.<= 0 30 21 4 0 0 0 0 0 0 0 0 20 75 TEMPERATURE RECORDS LOWEST(C) -5.0 -6.0 -3.0 4.0 5.0 16.0 19.0 18.0 12.0 6.0 1.0 -6.0 -6.0 DAY 6 5 7 2 2 12 20 30 26 14 28 29 MAXIMUM AIR TEMPERATURE (C) 4.5 5.9 16.7 21.5 30.4 35.4 36.0 35.2 31.0 23.7 18.7 8.0 22.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 20 27 31 31 23 0 0 0 133 DAYS WITH MAXIMUM TEMP. <= 0 1 2 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS HIGHEST(C) 8.0 13.0 28.0 31.0 36.0 41.0 41.0 38.0 35.0 27.0 26.0 15.0 41.0 DAY 23 14 20 23 22 21 1 9 18 1 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 6.7 7.3 9.4 11.3 12.9 13.0 12.1 12.8 12.6 13.7 11.7 8.5 10.9 MEAN DAILY TEMP. (MDT) (C) 1.1 2.3 12.0 15.8 24.0 28.9 30.0 28.8 24.7 16.9 12.8 3.7 16.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 4.0 3.0 115.0 238.0 278.0 242.5 115.5 0.0 0.0 0.0 996.0 HEATING DEG. DAYS(BASE 18 0C) 523.5 441.0 206.0 90.0 10.5 0.0 0.0 0.0 0.0 43.0 158.0 443.0 1915.0 DEWPOINT (MEAN C) -2.6 -2.4 3.4 4.1 6.2 11.7 13.1 11.5 9.8 1.8 2.0 -2.1 4.7 MIXING RATIO (G/KG) 3.59 3.75 5.69 5.96 6.87 10.00 10.95 9.87 8.78 5.00 5.08 3.81 6.61 VAPOUR PRESSURE (HPA) 5.08 5.31 8.03 8.35 9.64 13.91 15.21 13.74 12.30 7.09 7.20 5.40 9.27 SATURATION DEF. (HPA) 1.65 2.39 8.56 12.25 25.24 32.24 32.31 30.37 22.34 14.88 9.43 3.01 16.22 RELATIVE HUMIDITY (MEAN %) 77 71 56 46 31 32 34 33 37 34 46 67 47 RELATIVE HUMIDITY (MAX. %) 87 84 71 62 40 41 42 43 46 41 59 78 58 RELATIVE HUMIDITY (MIN. %) 66 59 47 36 25 27 28 27 30 28 37 55 39 RELATIVE HUMIDITY (MEAN% 03UTC) 84 83 69 60 40 41 42 42 46 41 57 75 57 RELATIVE HUMIDITY (MEAN% 09UTC) 75 65 51 41 27 30 30 30 35 30 41 63 43 RELATIVE HUMIDITY (MEAN% 15UTC) 77 68 54 40 27 30 31 28 32 33 46 69 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 38.5 27.0 26.6 28.4 6.4 4.4 5.2 0.0 0.9 0.0 13.2 68.3 218.9 DAYS WITH PRECIPITATION >=10 0 1 1 1 0 0 0 0 0 0 1 3 7 DAYS WITH PRECIPITATION >= 5 4 2 2 2 0 0 0 0 0 0 1 4 15 DAYS WITH PRECIPITATION >= 1 11 7 4 4 4 3 4 0 0 0 1 6 44 DAYS WITH PRECIPITATION 13 9 7 6 5 3 5 0 2 0 2 7 59 GREATEST DAILY PRECIPITATION 6.0 10.0 13.0 18.0 3.0 2.4 2.0 0.0 0.5 0.0 13.0 24.0 24.0 DAY 11 28 4 11 6 12 20 ** 8 ** 8 13 DAY WITH THUNDER STORM 0 0 3 0 0 0 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 10 4 1 0 0 0 0 0 0 0 0 5 20 DAYS WITH DUST 0 0 0 0 1 1 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 315 225 180 225 225 225 45 225 225 225 360 360 225 PREVAILING WIND SPEED(KNOTS) 8.5 5.3 7.2 11.7 11.5 6.8 14.1 6.0 7.1 7.0 11.1 8.8 8.1 PREVAILING WIND PERCENT 7.1 7.1 12.3 22.7 14.2 16.0 23.2 17.4 21.3 14.2 13.3 9.0 11.9 CALMS PERCENT OF WIND 83.2 77.1 49.0 46.0 36.1 30.0 16.8 32.3 34.7 56.1 70.7 84.5 51.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 311 328 192 250 264 326 56 78 298 284 325 332 312 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.3 0.3 3.1 1.4 0.4 3.7 0.5 1.1 1.4 2.0 0.8 0.6 WIND STEADINESES (MEAN %) 46.2 20.0 7.1 56.4 21.5 6.8 42.5 8.9 19.3 41.2 71.4 66.7 14.0 WIND SPEED (MEAN KNOTS) 1.3 1.5 4.2 5.5 6.5 5.9 8.7 5.6 5.7 3.4 2.8 1.2 4.3 FASTEST WIND DIRECTION 330 360 240 240 240 30 360 360 360 340 360 350 240 FASTEST WIND SPEED (KNOTS) 15 15 18 20 45 25 28 25 20 12 20 15 45 DAY 25 20 28 20 24 11 5 5 10 6 27 26 DAYS WITH SKY CLEAR (0-2)/8 4 5 6 11 16 27 17 29 25 26 18 19 203 DAYS WITH P.CLOUDY (3-6)/8 13 11 13 12 14 3 14 2 5 5 12 5 109 DAYS WITH CLOUDY (7-8)/8 14 12 12 7 1 0 0 0 0 0 0 7 53 DAYS WITH VISIBILITY =< 2 KM 3 0 0 0 1 0 0 0 0 0 0 3 7 DURATION OF SUNSHINE HOURS 94.9 112.5 165.5 167.7 289.4 345.6 305.3 353.3 290.1 290.9 230.6 185.1 2830.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 886.8 888.0 886.8 880.8 882.6 879.6 879.1 880.4 884.0 889.9 889.8 887.8 884.6 MAX. QFE PRESSURE IN HPA 898.0 895.3 895.5 888.8 888.5 884.4 884.4 885.5 889.0 897.2 899.1 894.9 899.1 DAY-HOUR 5- 6 4- 6 7- 6 26- 6 9- 6 14- 6 29- 6 26- 6 9- 6 14- 6 18- 6 31- 6 MIN. QFE PRESSURE IN HPA 872.1 879.5 877.8 872.4 875.5 873.9 871.7 874.5 875.2 884.4 881.9 879.3 871.7 DAY-HOUR 25- 3 12-15 24-15 28-12 27-15 25-15 4-15 8-15 2-15 29-12 24-12 23- 6 MEAN QNH PRESSURE IN HPA 1015.5 1016.8 1015.4 1008.8 1010.7 1007.4 1006.9 1008.3 1012.3 1018.9 1018.8 1016.6 1013.0 MAX. QNH PRESSURE IN HPA 1027.9 1024.9 1025.2 1017.7 1017.3 1012.8 1012.8 1014.0 1017.9 1027.1 1029.2 1024.5 1029.2 DAY-HOUR 5- 6 4- 6 7- 6 26- 6 9- 6 14- 6 29- 6 26- 6 9- 6 14- 6 18- 6 31- 6 MIN. QNH PRESSURE IN HPA 999.0 1007.3 1005.4 999.4 1002.8 1001.0 998.6 1001.7 1002.5 1012.8 1010.0 1007.1 998.6 DAY-HOUR 25- 3 12-15 24-15 28-12 27-15 25-15 4-15 8-15 2-15 29-12 24-12 23- 6 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 886.7 887.8 886.9 881.2 883.3 880.4 879.8 881.0 884.4 890.1 889.9 887.7 884.9 MAX. QFE PRESSURE IN HPA 897.2 893.8 893.9 887.7 887.4 883.8 883.4 884.8 887.4 896.2 897.9 892.8 897.9 DAY 5 4 7 26 9 14 24 4 9 14 18 31 MIN. QFE PRESSURE IN HPA 872.1 879.9 880.0 874.3 877.8 876.2 872.3 876.9 876.4 886.3 883.5 879.9 872.1 DAY 25 12 26 28 28 3 5 9 3 27 27 23 MEAN QNH PRESSURE IN HPA 1015.3 1016.6 1015.5 1009.2 1011.5 1008.3 1007.6 1009.0 1012.8 1019.1 1018.9 1016.4 1013.4 MAX. QNH PRESSURE IN HPA 1027.1 1023.3 1023.4 1016.5 1016.1 1012.1 1011.7 1013.2 1016.1 1025.9 1027.8 1022.1 1027.8 DAY 5 4 7 26 9 14 24 4 9 14 18 31 MIN. QNH PRESSURE IN HPA 999.0 1007.7 1007.9 1001.5 1005.4 1003.6 999.3 1004.4 1003.8 1014.9 1011.8 1007.7 999.0 DAY 25 12 26 28 28 3 5 9 3 27 27 23 MEAN QFF PRESSURE IN HPA 1019.0 1019.7 1013.9 1005.5 1004.1 998.5 997.2 999.5 1005.4 1015.7 1017.4 1019.3 1009.6 MAX. QFF PRESSURE IN HPA 1031.4 1028.9 1028.1 1014.0 1013.1 1003.3 1002.4 1004.5 1010.1 1024.5 1026.4 1027.9 1031.4 DAY 5 4 7 3 2 5 24 26 30 14 18 31 MIN. QFF PRESSURE IN HPA 1001.8 1010.2 1001.5 995.7 995.9 992.3 988.0 993.9 995.2 1010.7 1010.4 1009.3 988.0 DAY 25 12 24 28 28 27 5 9 3 28 24 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 887.7 889.2 888.0 882.1 883.8 880.9 880.4 881.8 885.4 891.0 890.9 888.9 885.8 MAX. QFE PRESSURE IN HPA 898.0 895.3 895.5 888.8 888.5 884.4 884.4 885.5 889.0 897.2 899.1 894.9 899.1 DAY 5 4 7 26 9 14 29 26 9 14 18 31 MIN. QFE PRESSURE IN HPA 876.4 882.4 881.2 875.1 878.4 876.8 873.7 877.2 877.7 887.2 884.6 879.3 873.7 DAY 25 12 24 28 28 26 5 9 3 29 24 23 MEAN QNH PRESSURE IN HPA 1016.5 1018.1 1016.8 1010.2 1012.1 1008.9 1008.2 1009.8 1013.9 1020.2 1020.1 1017.8 1014.4 MAX. QNH PRESSURE IN HPA 1027.9 1024.9 1025.2 1017.7 1017.3 1012.8 1012.8 1014.0 1017.9 1027.1 1029.2 1024.5 1029.2 DAY 5 4 7 26 9 14 29 26 9 14 18 31 MIN. QNH PRESSURE IN HPA 1003.8 1010.5 1009.2 1002.4 1006.1 1004.3 1000.8 1004.7 1005.3 1015.9 1013.0 1007.1 1000.8 DAY 25 12 24 28 28 26 5 9 3 29 24 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 887.6 888.8 887.5 881.5 883.1 880.2 879.7 881.1 884.5 890.3 890.3 888.2 885.2 MAX. QFE PRESSURE IN HPA 897.7 895.2 895.1 888.0 887.8 883.6 884.1 885.0 887.9 896.8 898.3 894.1 898.3 DAY 5 4 10 26 9 18 29 26 9 14 18 31 MIN. QFE PRESSURE IN HPA 878.3 880.6 880.4 873.9 877.9 876.2 873.6 877.0 877.2 886.1 883.1 879.6 873.6 DAY 21 12 24 28 27 27 5 16 3 29 24 13 MEAN QNH PRESSURE IN HPA 1016.4 1017.6 1016.2 1009.5 1011.4 1008.1 1007.6 1009.1 1012.9 1019.4 1019.4 1017.0 1013.7 MAX. QNH PRESSURE IN HPA 1027.6 1024.8 1024.7 1016.8 1016.6 1011.9 1012.4 1013.4 1016.7 1026.6 1028.3 1023.6 1028.3 DAY 5 4 10 26 9 18 29 26 9 14 18 31 MIN. QNH PRESSURE IN HPA 1006.0 1008.5 1008.3 1001.0 1005.5 1003.6 1000.7 1004.5 1004.7 1014.7 1011.3 1007.4 1000.7 DAY 21 12 24 28 27 27 5 16 3 29 24 13 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 886.1 887.1 885.9 879.8 881.6 878.5 878.2 879.5 883.0 889.0 888.9 887.2 883.7 MAX. QFE PRESSURE IN HPA 896.2 893.2 893.1 886.0 885.7 881.7 882.2 882.9 886.8 895.5 896.3 893.7 896.3 DAY 5 3 7 26 9 22 29 3 10 14 18 31 MIN. QFE PRESSURE IN HPA 875.5 879.8 878.2 872.4 875.8 874.1 873.0 875.3 875.7 884.4 881.9 879.6 872.4 DAY 21 12 24 28 27 25 5 16 2 29 24 23 MEAN QNH PRESSURE IN HPA 1014.6 1015.8 1014.4 1007.6 1009.6 1006.2 1005.8 1007.3 1011.3 1017.9 1017.8 1015.9 1012.0 MAX. QNH PRESSURE IN HPA 1025.9 1022.6 1022.5 1014.6 1014.2 1009.8 1010.3 1011.1 1015.4 1025.2 1026.0 1023.2 1026.0 DAY 5 3 7 26 9 22 29 3 10 14 18 31 MIN. QNH PRESSURE IN HPA 1002.8 1007.6 1005.8 999.4 1003.2 1001.3 1000.0 1002.6 1003.1 1012.8 1010.0 1007.4 999.4 DAY 21 12 24 28 27 25 5 16 2 29 24 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 886.0 887.1 885.7 879.5 881.2 878.0 877.5 878.8 882.7 888.9 889.0 887.3 883.5 MAX. QFE PRESSURE IN HPA 896.2 893.8 893.1 885.6 885.3 881.2 881.5 882.4 886.5 895.3 896.5 893.7 896.5 DAY 5 6 7 26 9 22 31 26 9 14 17 31 MIN. QFE PRESSURE IN HPA 874.6 879.5 877.8 873.7 875.5 873.9 871.7 874.5 875.2 884.4 881.9 880.6 871.7 DAY 21 12 24 28 27 25 4 8 2 29 24 13 MEAN QNH PRESSURE IN HPA 1014.6 1015.8 1014.2 1007.3 1009.2 1005.7 1005.1 1006.6 1010.9 1017.8 1017.9 1016.0 1011.8 MAX. QNH PRESSURE IN HPA 1025.9 1023.3 1022.5 1014.1 1013.8 1009.2 1009.5 1010.5 1015.1 1024.9 1026.3 1023.2 1026.3 DAY 5 6 7 26 9 22 31 26 9 14 17 31 MIN. QNH PRESSURE IN HPA 1001.8 1007.3 1005.4 1000.8 1002.8 1001.0 998.6 1001.7 1002.5 1012.8 1010.0 1008.5 998.6 DAY 21 12 24 28 27 25 4 8 2 29 24 13 MEAN QFF PRESSURE IN HPA 1018.2 1018.8 1012.4 1003.4 1001.6 995.6 994.6 996.9 1003.4 1014.3 1016.3 1018.9 1007.9 MAX. QFF PRESSURE IN HPA 1030.2 1028.9 1026.1 1013.3 1009.3 1000.6 999.5 1002.3 1009.4 1023.6 1025.0 1028.3 1030.2 DAY 5 6 7 3 2 11 31 26 30 14 17 31 MIN. QFF PRESSURE IN HPA 1005.6 1008.4 998.9 995.2 993.4 990.2 987.6 991.9 993.8 1008.9 1007.9 1009.9 987.6 DAY 24 12 24 28 27 27 4 9 2 29 24 13 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.9 5.5 12.0 19.4 24.9 30.6 34.9 31.6 27.1 19.8 10.3 4.6 18.6 MINIMUN AIR TEMPERATURE (C) -1.9 0.2 4.7 11.5 16.9 22.3 27.0 23.8 19.3 12.2 3.9 -0.2 11.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 5 22 31 26 9 0 0 0 93 DAYS WITH MINIMUM TEMP. <=-4 5 3 0 0 0 0 0 0 0 0 0 2 10 DAYS WITH FREEZING MIN.<= 0 29 15 5 0 0 0 0 0 0 0 3 19 71 TEMPERATURE RECORDS LOWEST(C) -6.0 -6.0 -3.0 4.0 11.0 16.0 22.0 17.0 16.0 6.0 -1.0 -5.0 -6.0 DAY 15 8 9 3 9 4 29 28 25 22 15 25 MAXIMUM AIR TEMPERATURE (C) 7.3 10.0 17.0 24.7 29.7 35.7 39.6 36.6 32.5 25.1 15.4 9.0 23.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 14 30 31 31 26 4 0 0 137 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 11.0 18.0 25.0 30.0 37.0 41.0 42.0 41.0 36.0 33.0 23.0 13.0 42.0 DAY 5 22 27 14 30 27 4 11 7 1 1 10 DIF. BETWEEN (MAX.-MIN.) (C) 9.2 9.8 12.3 13.2 12.8 13.4 12.6 12.8 13.2 12.9 11.5 9.2 11.9 MEAN DAILY TEMP. (MDT) (C) 2.7 5.1 10.9 18.1 23.3 29.0 33.3 30.2 25.9 18.7 9.6 4.4 17.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 6.5 83.0 240.0 380.5 285.0 147.5 17.0 0.0 0.0 1159.5 HEATING DEG. DAYS(BASE 18 0C) 474.5 362.0 221.5 38.0 0.0 0.0 0.0 0.0 0.0 40.0 250.5 422.0 1808.5 DEWPOINT (MEAN C) -3.8 -2.3 -0.8 3.0 10.3 10.8 15.4 11.5 10.7 5.3 1.0 -1.8 4.9 MIXING RATIO (G/KG) 3.34 3.81 4.20 5.73 9.32 9.76 13.50 9.99 9.35 6.43 4.76 3.90 7.01 VAPOUR PRESSURE (HPA) 4.74 5.38 5.93 8.06 13.02 13.59 18.59 13.91 13.09 9.06 6.75 5.53 9.80 SATURATION DEF. (HPA) 3.01 4.14 8.97 15.46 19.87 31.94 38.33 34.11 24.01 15.15 6.46 3.20 17.05 RELATIVE HUMIDITY (MEAN %) 63 60 43 36 42 33 34 30 37 40 55 65 45 RELATIVE HUMIDITY (MAX. %) 77 75 58 50 56 42 43 40 47 51 70 81 58 RELATIVE HUMIDITY (MIN. %) 51 47 33 27 32 24 28 25 29 31 43 52 35 RELATIVE HUMIDITY (MEAN% 03UTC) 74 72 57 49 56 42 42 40 46 51 68 79 56 RELATIVE HUMIDITY (MEAN% 09UTC) 56 56 38 33 37 30 31 27 35 35 49 58 40 RELATIVE HUMIDITY (MEAN% 15UTC) 66 60 40 31 36 30 31 28 35 38 56 65 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 14.0 28.3 5.2 2.3 8.8 9.4 0.0 0.5 0.0 0.0 14.3 18.0 100.8 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 0 1 0 2 DAYS WITH PRECIPITATION >= 5 0 3 0 0 0 1 0 0 0 0 1 2 7 DAYS WITH PRECIPITATION >= 1 5 5 2 2 4 3 0 0 0 0 3 3 27 DAYS WITH PRECIPITATION 5 6 3 6 10 4 0 1 0 0 4 5 44 GREATEST DAILY PRECIPITATION 4.0 12.0 4.2 1.0 2.0 6.0 0.0 0.5 0.0 0.0 10.0 8.1 12.0 DAY 18 6 18 16 6 3 ** 19 ** ** 29 19 DAY WITH THUNDER STORM 0 0 0 0 2 1 0 0 0 0 0 0 3 DAYS WITH SNOW OR SLEET 4 3 0 0 0 0 0 0 0 0 0 1 8 DAYS WITH DUST 0 0 1 0 0 0 0 0 0 1 0 0 2 WIND DIRECTION (PREVAILING) 360 225 225 225 225 225 180 180 225 270 270 270 225 PREVAILING WIND SPEED(KNOTS) 9.6 7.6 9.4 7.0 8.4 7.8 5.8 5.0 6.4 10.5 8.8 9.8 7.4 PREVAILING WIND PERCENT 11.0 7.9 19.4 20.7 26.5 15.3 17.4 14.2 18.7 12.9 10.7 6.5 11.5 CALMS PERCENT OF WIND 79.4 67.9 34.2 27.3 24.5 28.0 25.2 32.9 33.3 61.3 83.3 89.7 48.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 333 268 260 229 255 5 81 37 273 209 248 257 272 VECTOR WIND MAGNITUDE(KNOTS) 1.2 1.4 2.3 1.6 1.9 1.6 1.5 0.8 1.1 1.0 1.0 0.7 0.7 WIND STEADINESES (MEAN %) 66.7 50.0 42.6 29.1 29.2 23.5 27.3 16.0 22.0 33.3 71.4 77.8 17.1 WIND SPEED (MEAN KNOTS) 1.8 2.8 5.4 5.5 6.5 6.8 5.5 5.0 5.0 3.0 1.4 0.9 4.1 FASTEST WIND DIRECTION 360 320 220 70 360 360 360 360 30 280 260 250 220 FASTEST WIND SPEED (KNOTS) 20 18 25 20 25 25 22 20 20 25 25 16 25 DAY 14 11 2 22 15 3 28 17 1 30 29 24 DAYS WITH SKY CLEAR (0-2)/8 17 13 17 13 14 24 21 26 28 23 13 10 219 DAYS WITH P.CLOUDY (3-6)/8 9 9 10 11 17 6 10 5 2 8 13 13 113 DAYS WITH CLOUDY (7-8)/8 5 6 4 6 0 0 0 0 0 0 4 8 33 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 1 1 DURATION OF SUNSHINE HOURS 197.4 177.6 265.4 254.7 301.5 329.6 334.6 344.1 312.2 292.9 198.0 152.8 3160.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 888.1 884.6 883.6 885.1 882.8 880.6 878.5 880.4 884.1 886.8 889.9 889.2 884.5 MAX. QFE PRESSURE IN HPA 900.5 894.5 892.4 894.4 890.0 885.2 883.8 887.6 892.5 895.5 897.7 896.5 900.5 DAY-HOUR 15- 6 17- 9 5- 6 3- 6 20- 6 17- 6 28- 9 31- 6 19- 6 20- 6 15- 6 25- 6 MIN. QFE PRESSURE IN HPA 878.9 874.8 872.9 876.3 877.7 874.7 873.5 872.7 873.5 877.5 877.5 877.4 872.7 DAY-HOUR 5-12 11- 3 27-15 23-15 17-15 12-12 17-15 15-15 10-12 4-12 29- 6 23-12 MEAN QNH PRESSURE IN HPA 1016.9 1013.0 1011.8 1013.5 1011.0 1008.5 1006.2 1008.3 1012.4 1015.4 1018.9 1018.1 1012.8 MAX. QNH PRESSURE IN HPA 1030.7 1024.0 1021.7 1023.9 1019.0 1013.7 1012.1 1016.3 1021.8 1025.2 1027.6 1026.3 1030.7 DAY-HOUR 15- 6 17- 9 5- 6 3- 6 20- 6 17- 6 28- 9 31- 6 19- 6 20- 6 15- 6 25- 6 MIN. QNH PRESSURE IN HPA 1006.6 1002.1 999.9 1003.7 1005.3 1001.9 1000.6 999.7 1000.6 1005.1 1005.1 1005.0 999.7 DAY-HOUR 5-12 11- 3 27-15 23-15 17-15 12-12 17-15 15-15 10-12 4-12 29- 6 23-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 888.1 884.5 883.8 885.6 883.5 881.3 879.1 881.1 884.5 886.9 889.8 888.8 884.8 MAX. QFE PRESSURE IN HPA 899.4 892.7 890.8 893.6 889.1 884.4 883.3 886.6 892.1 894.5 896.0 895.5 899.4 DAY 15 18 5 5 20 8 29 31 19 21 15 25 MIN. QFE PRESSURE IN HPA 881.1 874.8 875.5 878.3 880.0 876.4 875.5 874.7 874.0 879.5 878.7 880.5 874.0 DAY 6 11 2 23 7 25 17 15 10 4 29 23 MEAN QNH PRESSURE IN HPA 1016.9 1012.9 1012.1 1014.1 1011.8 1009.3 1006.8 1009.1 1012.9 1015.6 1018.8 1017.7 1013.2 MAX. QNH PRESSURE IN HPA 1029.5 1022.0 1019.9 1023.0 1018.0 1012.8 1011.5 1015.2 1021.4 1024.0 1025.7 1025.2 1029.5 DAY 15 18 5 5 20 8 29 31 19 21 15 25 MIN. QNH PRESSURE IN HPA 1009.1 1002.1 1002.8 1006.0 1007.9 1003.8 1002.8 1001.9 1001.2 1007.3 1006.4 1008.4 1001.2 DAY 6 11 2 23 7 25 17 15 10 4 29 23 MEAN QFF PRESSURE IN HPA 1020.4 1015.0 1011.4 1009.9 1004.7 999.7 995.1 999.1 1005.1 1011.2 1018.9 1020.2 1009.2 MAX. QFF PRESSURE IN HPA 1034.9 1024.6 1022.8 1021.7 1010.6 1004.8 1001.4 1007.5 1014.5 1022.3 1028.6 1029.7 1034.9 DAY 15 18 5 3 20 4 29 31 19 21 15 25 MIN. QFF PRESSURE IN HPA 1011.3 1003.0 999.4 999.3 1000.4 992.8 991.2 990.7 992.4 1001.0 1005.8 1008.3 990.7 DAY 6 11 27 23 25 25 5 15 10 3 29 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 889.5 885.7 884.9 886.4 884.2 881.8 879.8 881.8 885.4 888.2 891.2 890.3 885.8 MAX. QFE PRESSURE IN HPA 900.5 894.1 892.4 894.4 890.0 885.2 883.7 887.6 892.5 895.5 897.7 896.5 900.5 DAY 15 17 5 3 20 17 7 31 19 20 15 25 MIN. QFE PRESSURE IN HPA 883.2 876.2 876.3 879.0 880.6 876.9 876.1 875.6 875.2 880.7 877.5 880.3 875.2 DAY 6 11 27 23 7 12 17 15 10 4 29 23 MEAN QNH PRESSURE IN HPA 1018.4 1014.2 1013.3 1015.0 1012.5 1009.8 1007.6 1009.8 1013.9 1017.0 1020.3 1019.3 1014.3 MAX. QNH PRESSURE IN HPA 1030.7 1023.6 1021.7 1023.9 1019.0 1013.7 1012.0 1016.3 1021.8 1025.2 1027.6 1026.3 1030.7 DAY 15 17 5 3 20 17 7 31 19 20 15 25 MIN. QNH PRESSURE IN HPA 1011.4 1003.6 1003.7 1006.7 1008.5 1004.4 1003.5 1002.9 1002.5 1008.6 1005.1 1008.2 1002.5 DAY 6 11 27 23 7 12 17 15 10 4 29 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 888.6 885.4 884.2 885.7 883.4 881.1 879.1 881.0 884.7 887.4 890.5 889.8 885.1 MAX. QFE PRESSURE IN HPA 899.2 894.5 891.6 893.7 888.9 884.9 883.8 886.1 891.8 895.1 896.6 896.2 899.2 DAY 15 17 5 3 19 17 28 31 18 20 14 25 MIN. QFE PRESSURE IN HPA 881.6 876.0 875.4 879.0 880.0 876.2 875.7 874.9 874.9 879.9 878.6 879.1 874.9 DAY 5 11 2 15 7 12 17 15 10 4 29 23 MEAN QNH PRESSURE IN HPA 1017.5 1013.9 1012.6 1014.2 1011.6 1009.1 1006.9 1009.0 1013.1 1016.1 1019.5 1018.8 1013.5 MAX. QNH PRESSURE IN HPA 1029.3 1024.0 1020.8 1023.2 1017.8 1013.3 1012.1 1014.7 1021.0 1024.7 1026.4 1025.9 1029.3 DAY 15 17 5 3 19 17 28 31 18 20 14 25 MIN. QNH PRESSURE IN HPA 1009.6 1003.4 1002.7 1006.7 1007.9 1003.6 1003.1 1002.2 1002.2 1007.7 1006.3 1006.9 1002.2 DAY 5 11 2 15 7 12 17 15 10 4 29 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 887.3 883.8 882.5 883.9 881.7 879.7 877.5 879.3 882.9 885.8 889.1 888.4 883.5 MAX. QFE PRESSURE IN HPA 897.8 892.3 889.6 891.5 888.6 884.3 882.0 884.0 890.5 893.4 895.4 894.7 897.8 DAY 15 17 5 3 19 7 28 30 18 20 14 25 MIN. QFE PRESSURE IN HPA 878.9 875.2 873.3 876.8 878.5 874.7 873.6 873.0 873.5 877.5 878.8 877.4 873.0 DAY 5 11 27 20 17 12 17 15 10 4 29 23 MEAN QNH PRESSURE IN HPA 1016.0 1012.1 1010.7 1012.2 1009.7 1007.6 1005.1 1007.1 1011.1 1014.3 1018.0 1017.2 1011.7 MAX. QNH PRESSURE IN HPA 1027.7 1021.6 1018.6 1020.7 1017.5 1012.7 1010.1 1012.3 1019.6 1022.8 1025.0 1024.3 1027.7 DAY 15 17 5 3 19 7 28 30 18 20 14 25 MIN. QNH PRESSURE IN HPA 1006.6 1002.5 1000.4 1004.3 1006.2 1001.9 1000.7 1000.0 1000.6 1005.1 1006.5 1005.0 1000.0 DAY 5 11 27 20 17 12 17 15 10 4 29 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 887.3 883.9 882.5 883.8 881.5 879.3 877.0 878.9 882.8 885.7 889.2 888.6 883.4 MAX. QFE PRESSURE IN HPA 897.8 892.3 889.6 891.9 887.3 884.0 881.5 883.7 890.9 893.4 895.8 894.7 897.8 DAY 15 17 5 3 19 7 28 30 18 20 14 25 MIN. QFE PRESSURE IN HPA 878.9 875.8 872.9 876.3 877.7 874.8 873.5 872.7 873.7 877.7 878.7 877.5 872.7 DAY 5 11 27 23 17 12 17 15 9 4 28 23 MEAN QNH PRESSURE IN HPA 1016.0 1012.2 1010.6 1012.1 1009.5 1007.1 1004.6 1006.6 1011.0 1014.2 1018.1 1017.5 1011.6 MAX. QNH PRESSURE IN HPA 1027.7 1021.6 1018.6 1021.1 1016.0 1012.3 1009.5 1012.0 1020.0 1022.8 1025.5 1024.3 1027.7 DAY 15 17 5 3 19 7 28 30 18 20 14 25 MIN. QNH PRESSURE IN HPA 1006.6 1003.2 999.9 1003.7 1005.3 1002.1 1000.6 999.7 1000.8 1005.3 1006.4 1005.1 999.7 DAY 5 11 27 23 17 12 17 15 9 4 28 23 MEAN QFF PRESSURE IN HPA 1019.5 1014.2 1009.8 1007.8 1002.3 997.4 992.6 996.6 1003.0 1009.8 1018.2 1020.0 1007.6 MAX. QFF PRESSURE IN HPA 1033.8 1023.6 1021.4 1020.1 1008.8 1003.9 998.3 1004.1 1012.8 1020.5 1027.4 1029.0 1033.8 DAY 15 17 5 3 19 7 28 30 18 20 15 25 MIN. QFF PRESSURE IN HPA 1007.7 1004.4 995.0 997.8 996.8 990.7 989.3 988.3 992.0 999.3 1005.7 1005.0 988.3 DAY 5 11 27 23 25 30 17 15 10 4 28 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.8 3.7 7.7 16.7 23.5 29.7 33.3 31.4 27.5 19.8 11.0 6.0 18.0 MINIMUN AIR TEMPERATURE (C) 0.3 -1.1 2.4 9.5 15.9 21.8 25.7 23.0 19.9 12.5 3.7 1.0 11.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 24 31 28 14 0 0 0 98 DAYS WITH MINIMUM TEMP. <=-4 1 8 1 0 0 0 0 0 0 0 0 0 10 DAYS WITH FREEZING MIN.<= 0 22 22 9 0 0 0 0 0 0 0 4 15 72 TEMPERATURE RECORDS LOWEST(C) -4.0 -9.0 -7.0 3.0 9.0 17.0 23.0 20.0 16.0 7.0 0.0 -2.0 -9.0 DAY 3 17 3 3 8 7 5 26 19 31 15 2 MAXIMUM AIR TEMPERATURE (C) 11.5 8.7 12.5 22.0 28.8 34.9 38.6 37.6 33.5 25.6 17.3 11.2 23.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 11 29 31 31 29 4 0 0 135 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.0 16.0 19.0 28.0 34.0 39.0 41.0 41.0 38.0 31.0 25.0 19.0 41.0 DAY 18 8 31 22 31 25 8 1 1 1 5 6 DIF. BETWEEN (MAX.-MIN.) (C) 11.2 9.8 10.1 12.5 12.9 13.1 12.9 14.6 13.6 13.1 13.6 10.2 12.3 MEAN DAILY TEMP. (MDT) (C) 5.9 3.8 7.5 15.7 22.3 28.3 32.2 30.3 26.7 19.1 10.5 6.1 17.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 49.5 220.0 346.5 289.0 171.0 10.0 0.0 0.0 1086.0 HEATING DEG. DAYS(BASE 18 0C) 375.0 411.5 327.0 81.5 2.0 0.0 0.0 0.0 0.0 23.0 226.0 369.0 1815.0 DEWPOINT (MEAN C) -0.2 -4.9 0.0 5.6 8.7 9.5 13.1 10.5 10.5 6.8 -1.4 -0.8 4.8 MIXING RATIO (G/KG) 4.37 3.32 4.59 6.60 8.15 8.63 10.96 9.25 9.26 7.12 4.12 4.14 6.71 VAPOUR PRESSURE (HPA) 6.17 4.68 6.47 9.27 11.42 12.05 15.19 12.90 12.97 10.02 5.86 5.88 9.41 SATURATION DEF. (HPA) 3.38 3.68 4.52 10.71 18.43 30.64 37.26 34.55 25.26 14.12 8.03 3.88 16.21 RELATIVE HUMIDITY (MEAN %) 67 56 61 50 41 30 30 29 36 44 44 64 46 RELATIVE HUMIDITY (MAX. %) 84 73 77 70 58 40 41 39 48 57 57 79 60 RELATIVE HUMIDITY (MIN. %) 52 42 49 37 30 22 24 21 27 35 33 51 35 RELATIVE HUMIDITY (MEAN% 03UTC) 82 66 73 67 56 40 40 38 47 56 54 77 58 RELATIVE HUMIDITY (MEAN% 09UTC) 58 50 55 43 35 25 27 24 31 39 35 53 40 RELATIVE HUMIDITY (MEAN% 15UTC) 63 53 56 44 33 26 27 24 32 42 46 65 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 6.9 23.7 40.7 9.5 10.5 6.0 0.0 0.0 1.4 1.4 4.0 14.7 118.8 DAYS WITH PRECIPITATION >=10 0 1 1 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 0 2 2 0 0 0 0 0 0 0 0 1 5 DAYS WITH PRECIPITATION >= 1 3 4 6 4 3 2 0 0 1 1 2 6 32 DAYS WITH PRECIPITATION 6 8 12 13 7 2 0 0 2 2 2 6 60 GREATEST DAILY PRECIPITATION 3.0 10.5 26.2 4.0 4.0 4.0 0.0 0.0 1.2 1.0 3.0 6.0 26.2 DAY 24 10 22 15 7 7 ** ** 14 28 28 31 DAY WITH THUNDER STORM 0 0 1 1 3 0 0 0 1 0 0 0 6 DAYS WITH SNOW OR SLEET 0 2 2 0 0 0 0 0 0 0 0 2 6 DAYS WITH DUST 0 0 0 0 1 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 270 360 315 360 315 360 315 360 180 180 360 180 360 PREVAILING WIND SPEED(KNOTS) 9.3 14.4 10.5 13.5 11.1 12.8 10.4 7.9 8.3 6.5 12.3 3.0 11.7 PREVAILING WIND PERCENT 5.4 4.6 5.9 6.7 9.7 11.1 4.3 10.2 5.6 4.3 2.2 0.5 4.6 CALMS PERCENT OF WIND 87.6 83.9 86.0 80.6 66.7 81.7 90.9 76.3 81.7 84.4 95.6 97.8 84.4 NO. OF WIND OBSERVATION 186 174 186 180 186 180 186 186 180 186 180 186 2196 VECTOR WIND DIRECTION (MEAN) 230 291 330 307 302 345 336 358 277 238 326 299 318 VECTOR WIND MAGNITUDE(KNOTS) 0.5 0.3 1.3 1.2 2.2 2.0 0.5 1.4 0.5 0.5 0.3 0.1 0.7 WIND STEADINESES (MEAN %) 55.6 17.6 72.2 54.5 56.4 90.9 62.5 66.7 27.8 41.7 75.0 100.0 43.8 WIND SPEED (MEAN KNOTS) 0.9 1.7 1.8 2.2 3.9 2.2 0.8 2.1 1.8 1.2 0.4 0.1 1.6 FASTEST WIND DIRECTION 270 360 340 190 360 340 310 30 310 270 340 340 360 FASTEST WIND SPEED (KNOTS) 18 22 25 20 30 30 20 20 25 20 20 10 30 DAY 15 14 8 25 7 17 21 5 18 15 29 18 DAYS WITH SKY CLEAR (0-2)/8 19 11 12 9 10 27 26 31 25 21 26 10 227 DAYS WITH P.CLOUDY (3-6)/8 10 12 10 12 19 2 5 0 5 8 3 10 96 DAYS WITH CLOUDY (7-8)/8 2 6 9 9 2 1 0 0 0 2 1 11 43 DAYS WITH VISIBILITY =< 2 KM 0 0 1 0 0 0 0 0 0 0 0 0 1 DURATION OF SUNSHINE HOURS 213.7 175.4 173.8 185.0 263.9 345.6 321.8 350.8 297.8 242.8 234.6 130.6 2935.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 885.1 885.3 884.5 883.9 882.9 881.4 877.1 880.9 883.9 886.0 891.6 889.7 884.4 MAX. QFE PRESSURE IN HPA 894.1 896.9 892.3 891.5 887.1 886.2 883.3 884.7 889.9 896.8 898.9 897.2 898.9 DAY-HOUR 1- 6 21- 6 27- 6 4- 6 2- 6 26- 6 23- 6 26- 6 11- 6 31-18 14- 6 16- 6 MIN. QFE PRESSURE IN HPA 878.2 874.1 876.1 879.8 875.0 876.9 870.2 876.7 879.3 878.6 880.2 877.7 870.2 DAY-HOUR 13- 3 10-18 21-15 22-12 27-18 10-15 3-15 30-15 23-12 17-12 28-12 10-18 MEAN QNH PRESSURE IN HPA 1013.6 1013.8 1012.9 1012.2 1011.0 1009.4 1004.6 1008.8 1012.2 1014.6 1020.9 1018.7 1012.7 MAX. QNH PRESSURE IN HPA 1023.6 1026.7 1021.6 1020.7 1015.8 1014.8 1011.5 1013.1 1018.9 1026.6 1029.0 1027.1 1029.0 DAY-HOUR 1- 6 21- 6 27- 6 4- 6 2- 6 26- 6 23- 6 26- 6 11- 6 31-18 14- 6 16- 6 MIN. QNH PRESSURE IN HPA 1005.8 1001.3 1003.5 1007.6 1002.3 1004.4 996.9 1004.2 1007.1 1006.3 1008.1 1005.3 996.9 DAY-HOUR 13- 3 10-18 21-15 22-12 27-18 10-15 3-15 30-15 23-12 17-12 28-12 10-18 MEAN QFF PRESSURE IN HPA 1015.3 ****** 1013.5 1008.6 1004.2 999.8 993.3 998.7 1003.7 1009.7 1020.6 1020.5 ****** MAX. QFF PRESSURE IN HPA 1024.7 ****** 1023.1 1020.0 1011.7 1005.5 1001.6 1004.0 1010.5 1026.7 1029.6 1028.5 ****** DAY-HOUR 1- 3 **-** 28- 6 4- 6 8- 6 21- 3 23- 3 26- 6 29- 6 31-18 14- 3 19- 6 MIN. QFF PRESSURE IN HPA 1007.8 ****** 1000.5 1001.9 993.4 993.9 985.4 993.5 997.4 1000.2 1006.1 1005.1 ****** DAY-HOUR 24-15 **-** 21-15 22-15 27-18 30-15 3-18 1-15 2-15 17-15 28-15 10-18 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 884.9 885.3 884.6 884.1 883.6 882.1 877.8 881.5 884.3 886.2 891.8 889.7 884.7 MAX. QFE PRESSURE IN HPA 892.6 895.2 891.7 890.8 886.5 885.9 883.1 884.0 888.9 894.2 897.8 895.6 897.8 DAY 1 21 27 4 2 21 23 27 11 31 13 16 MIN. QFE PRESSURE IN HPA 878.2 875.0 876.7 880.9 878.1 879.1 873.6 878.6 881.0 881.5 880.4 880.6 873.6 DAY 13 11 22 18 28 3 4 31 5 18 29 11 MEAN QNH PRESSURE IN HPA 1013.4 1013.7 1013.0 1012.4 1011.9 1010.2 1005.4 1009.6 1012.7 1014.8 1021.0 1018.7 1013.1 MAX. QNH PRESSURE IN HPA 1021.9 1024.8 1020.9 1019.9 1015.1 1014.4 1011.3 1012.3 1017.8 1023.7 1027.7 1025.3 1027.7 DAY 1 21 27 4 2 21 23 27 11 31 13 16 MIN. QNH PRESSURE IN HPA 1005.8 1002.3 1004.2 1008.9 1005.7 1006.9 1000.7 1006.3 1009.0 1009.5 1008.3 1008.5 1000.7 DAY 13 11 22 18 28 3 4 31 5 18 29 11 MEAN QFF PRESSURE IN HPA 1015.2 1016.3 1013.7 1008.8 1005.1 1000.7 994.3 999.4 1004.3 1010.0 1021.1 1020.6 1009.1 MAX. QFF PRESSURE IN HPA 1024.7 1030.1 1022.4 1019.5 1011.3 1005.5 1001.6 1003.5 1010.0 1022.7 1029.6 1026.6 1030.1 DAY 1 21 28 4 8 21 23 27 30 31 14 14 MIN. QFF PRESSURE IN HPA 1008.6 1002.0 1002.1 1003.6 997.3 997.2 989.0 995.5 999.1 1004.1 1006.8 1009.2 989.0 DAY 13 11 22 18 28 5 20 1 5 18 29 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 886.4 886.7 885.7 885.0 884.3 882.7 878.3 882.2 885.2 887.3 892.8 890.8 885.6 MAX. QFE PRESSURE IN HPA 894.1 896.9 892.3 891.5 887.1 886.2 883.3 884.7 889.9 896.0 898.9 897.2 898.9 DAY 1 21 27 4 2 26 23 26 11 31 14 16 MIN. QFE PRESSURE IN HPA 880.2 876.7 877.7 882.0 878.9 879.4 874.0 879.3 882.3 882.5 881.5 882.2 874.0 DAY 13 5 22 9 28 6 3 31 18 18 29 11 MEAN QNH PRESSURE IN HPA 1015.0 1015.3 1014.2 1013.4 1012.7 1010.9 1006.0 1010.3 1013.7 1016.0 1022.1 1019.9 1014.1 MAX. QNH PRESSURE IN HPA 1023.6 1026.7 1021.6 1020.7 1015.8 1014.8 1011.5 1013.1 1018.9 1025.7 1029.0 1027.1 1029.0 DAY 1 21 27 4 2 26 23 26 11 31 14 16 MIN. QNH PRESSURE IN HPA 1008.1 1004.2 1005.3 1010.1 1006.6 1007.2 1001.2 1007.1 1010.4 1010.6 1009.5 1010.3 1001.2 DAY 13 5 22 9 28 6 3 31 18 18 29 11 MEAN QFF PRESSURE IN HPA 1016.5 1018.0 1014.7 1009.6 1005.6 1001.2 994.5 999.9 1004.9 1010.7 1021.3 1021.5 1009.9 MAX. QFF PRESSURE IN HPA 1023.3 1031.1 1023.1 1020.0 1011.7 1004.7 1001.4 1004.0 1010.5 1024.7 1029.4 1028.5 1031.1 DAY 9 21 28 4 8 21 23 26 29 31 14 19 MIN. QFF PRESSURE IN HPA 1010.6 1004.0 1004.2 1004.4 997.8 996.9 989.7 995.7 1000.3 1004.7 1008.4 1010.2 989.7 DAY 31 11 22 18 28 17 3 1 8 18 29 11 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 885.8 886.2 885.4 884.5 883.5 882.2 877.8 881.5 884.6 886.7 892.1 890.0 885.0 MAX. QFE PRESSURE IN HPA 893.5 896.2 892.3 890.9 886.8 886.0 881.4 884.0 889.7 896.0 898.6 896.5 898.6 DAY 1 21 27 4 8 26 22 26 11 31 14 16 MIN. QFE PRESSURE IN HPA 879.7 876.2 878.6 881.3 878.9 878.9 873.0 879.1 881.3 880.4 881.5 882.8 873.0 DAY 13 5 21 22 28 6 3 31 18 17 29 11 MEAN QNH PRESSURE IN HPA 1014.4 1014.8 1013.8 1012.9 1011.7 1010.3 1005.4 1009.5 1013.0 1015.3 1021.3 1019.1 1013.5 MAX. QNH PRESSURE IN HPA 1022.9 1025.9 1021.6 1020.0 1015.4 1014.6 1009.4 1012.3 1018.7 1025.7 1028.6 1026.3 1028.6 DAY 1 21 27 4 8 26 22 26 11 31 14 16 MIN. QNH PRESSURE IN HPA 1007.5 1003.6 1006.3 1009.3 1006.6 1006.6 1000.0 1006.9 1009.3 1008.3 1009.5 1011.0 1000.0 DAY 13 5 21 22 28 6 3 31 18 17 29 11 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 884.2 884.2 883.6 883.1 881.9 880.5 876.3 879.8 882.9 885.0 890.8 888.8 883.4 MAX. QFE PRESSURE IN HPA 891.7 893.9 890.3 889.3 885.4 884.4 880.6 882.4 887.8 895.6 897.1 895.4 897.1 DAY 1 21 27 4 2 26 22 26 11 31 12 16 MIN. QFE PRESSURE IN HPA 878.9 875.3 876.4 879.8 877.8 877.5 871.5 877.3 879.3 878.6 880.2 880.3 871.5 DAY 12 10 21 22 27 6 3 30 23 17 28 10 MEAN QNH PRESSURE IN HPA 1012.6 1012.6 1011.9 1011.3 1010.0 1008.4 1003.7 1007.7 1011.0 1013.4 1019.9 1017.7 1011.7 MAX. QNH PRESSURE IN HPA 1020.9 1023.4 1019.4 1018.2 1013.9 1012.8 1008.5 1010.5 1016.6 1025.3 1026.9 1025.0 1026.9 DAY 1 21 27 4 2 26 22 26 11 31 12 16 MIN. QNH PRESSURE IN HPA 1006.6 1002.6 1003.8 1007.6 1005.4 1005.1 998.4 1004.8 1007.1 1006.3 1008.1 1008.2 998.4 DAY 12 10 21 22 27 6 3 30 23 17 28 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 884.3 884.4 883.6 883.0 881.4 879.9 875.6 879.5 882.6 885.0 890.9 889.2 883.3 MAX. QFE PRESSURE IN HPA 891.7 894.1 890.2 888.5 886.4 883.7 880.0 882.1 887.2 895.8 897.3 895.6 897.3 DAY 1 20 26 3 2 26 6 26 12 31 14 16 MIN. QFE PRESSURE IN HPA 878.9 875.4 876.1 879.8 875.3 876.9 870.2 876.7 879.4 878.6 880.2 879.7 870.2 DAY 12 10 21 22 27 10 3 30 23 17 28 10 MEAN QNH PRESSURE IN HPA 1012.6 1012.8 1011.9 1011.2 1009.4 1007.7 1002.9 1007.3 1010.8 1013.4 1020.1 1018.1 1011.5 MAX. QNH PRESSURE IN HPA 1020.9 1023.6 1019.2 1017.3 1015.0 1012.0 1007.9 1010.2 1015.9 1025.5 1027.2 1025.3 1027.2 DAY 1 20 26 3 2 26 6 26 12 31 14 16 MIN. QNH PRESSURE IN HPA 1006.6 1002.7 1003.5 1007.6 1002.6 1004.4 996.9 1004.2 1007.2 1006.3 1008.1 1007.5 996.9 DAY 12 10 21 22 27 10 3 30 23 17 28 10 MEAN QFF PRESSURE IN HPA 1014.3 1015.3 1012.5 1007.5 1002.6 998.1 991.6 997.1 1002.3 1008.6 1020.1 1019.9 1007.5 MAX. QFF PRESSURE IN HPA 1024.1 1027.9 1020.3 1017.0 1009.4 1002.5 997.7 1001.0 1008.0 1024.6 1028.8 1026.3 1028.8 DAY 1 20 27 3 2 14 22 26 29 31 13 13 MIN. QFF PRESSURE IN HPA 1007.8 1002.4 1000.5 1001.9 994.3 993.9 985.5 993.5 997.4 1000.2 1006.1 1007.9 985.5 DAY 24 10 21 22 27 30 3 1 2 17 28 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 885.0 885.3 884.4 883.9 882.6 880.9 876.7 880.8 883.6 886.1 891.6 889.7 884.2 MAX. QFE PRESSURE IN HPA 891.7 894.7 891.5 890.1 885.9 884.9 881.2 883.3 887.8 896.8 898.1 895.8 898.1 DAY 1 20 26 3 2 26 22 26 11 31 14 16 MIN. QFE PRESSURE IN HPA 878.9 874.1 876.7 880.8 875.0 877.7 870.5 877.5 880.7 880.9 880.3 877.7 870.5 DAY 6 10 1 24 27 30 3 30 2 17 28 10 MEAN QNH PRESSURE IN HPA 1013.5 1013.8 1012.8 1012.3 1010.7 1008.9 1004.2 1008.7 1011.9 1014.7 1020.8 1018.7 1012.6 MAX. QNH PRESSURE IN HPA 1020.9 1024.3 1020.7 1019.1 1014.4 1013.3 1009.2 1011.5 1016.6 1026.6 1028.1 1025.5 1028.1 DAY 1 20 26 3 2 26 22 26 11 31 14 16 MIN. QNH PRESSURE IN HPA 1006.6 1001.3 1004.2 1008.7 1002.3 1005.3 997.3 1005.1 1008.6 1008.9 1008.2 1005.3 997.3 DAY 6 10 1 24 27 30 3 30 2 17 28 10 MEAN QFF PRESSURE IN HPA 1015.2 1016.4 1013.2 1008.4 1003.6 999.2 992.8 998.4 1003.3 1009.5 1020.1 1020.2 1008.3 MAX. QFF PRESSURE IN HPA 1024.0 1028.6 1021.5 1019.0 1008.2 1003.2 999.0 1002.2 1008.8 1026.7 1028.9 1026.4 1028.9 DAY 1 20 26 3 4 14 22 26 29 31 14 19 MIN. QFF PRESSURE IN HPA 1007.9 1000.2 1002.5 1002.5 993.4 994.3 985.4 995.5 998.7 1003.6 1006.4 1005.1 985.4 DAY 30 10 21 24 27 30 3 30 4 16 28 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.2 8.7 16.7 18.8 23.9 32.2 33.9 31.5 28.0 17.4 11.1 5.5 19.0 MINIMUN AIR TEMPERATURE (C) -2.8 1.9 8.7 11.7 16.8 24.1 26.5 23.3 19.5 12.2 5.8 1.6 12.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 26 31 29 6 0 0 0 94 DAYS WITH MINIMUM TEMP. <=-4 12 1 0 0 0 0 0 0 0 0 0 3 16 DAYS WITH FREEZING MIN.<= 0 26 13 0 0 0 0 0 0 0 0 0 11 50 TEMPERATURE RECORDS LOWEST(C) -7.0 -5.0 2.0 8.0 12.0 17.0 21.0 16.0 17.0 2.0 2.0 -5.0 -7.0 DAY 10 3 6 17 19 2 30 30 7 24 18 26 MAXIMUM AIR TEMPERATURE (C) 3.9 14.8 22.7 23.8 29.2 37.5 39.1 37.3 34.2 23.7 17.4 10.6 24.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 14 30 31 30 30 5 0 0 142 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 9.0 22.0 29.0 30.0 34.0 41.0 41.0 41.0 38.0 33.0 20.0 20.0 41.0 DAY 30 19 20 24 14 22 4 13 12 2 7 6 DIF. BETWEEN (MAX.-MIN.) (C) 6.7 12.9 14.0 12.1 12.4 13.4 12.6 14.0 14.7 11.5 11.6 9.0 12.1 MEAN DAILY TEMP. (MDT) (C) 0.6 8.3 15.7 17.7 23.0 30.8 32.8 30.3 26.8 18.0 11.6 6.1 18.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 1.0 10.0 68.0 293.5 366.0 288.5 175.0 23.5 0.0 0.0 1225.5 HEATING DEG. DAYS(BASE 18 0C) 540.5 270.5 85.0 42.0 0.0 0.0 0.0 0.0 0.0 75.0 191.0 369.0 1573.0 DEWPOINT (MEAN C) -4.4 -0.3 2.4 5.7 8.0 9.2 11.0 13.7 7.1 6.1 3.0 0.1 5.1 MIXING RATIO (G/KG) 3.22 4.26 5.44 6.76 7.81 8.50 9.51 11.65 7.28 6.80 5.49 4.47 6.76 VAPOUR PRESSURE (HPA) 4.56 6.05 7.67 9.47 10.95 11.84 13.20 16.17 10.24 9.59 7.76 6.33 9.49 SATURATION DEF. (HPA) 1.72 6.02 12.27 13.10 19.71 37.64 40.99 31.77 28.87 12.03 5.93 3.08 17.76 RELATIVE HUMIDITY (MEAN %) 73 57 40 47 39 25 26 36 28 52 60 70 46 RELATIVE HUMIDITY (MAX. %) 85 74 55 64 56 38 36 48 39 65 75 84 60 RELATIVE HUMIDITY (MIN. %) 59 42 30 35 28 18 19 28 20 36 42 54 34 RELATIVE HUMIDITY (MEAN% 03UTC) 79 73 53 62 53 38 35 47 39 62 73 80 58 RELATIVE HUMIDITY (MEAN% 09UTC) 63 47 35 41 33 22 22 32 22 41 45 56 38 RELATIVE HUMIDITY (MEAN% 15UTC) 75 52 35 41 33 20 23 31 26 45 55 67 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 44.4 12.0 4.0 20.2 23.6 1.1 1.0 7.4 0.0 17.1 18.6 22.2 171.6 DAYS WITH PRECIPITATION >=10 1 0 0 1 0 0 0 0 0 0 0 1 3 DAYS WITH PRECIPITATION >= 5 3 1 0 1 2 0 0 1 0 1 2 2 13 DAYS WITH PRECIPITATION >= 1 13 2 2 5 9 1 1 1 0 5 4 6 49 DAYS WITH PRECIPITATION 16 2 3 8 12 2 1 2 0 11 5 6 68 GREATEST DAILY PRECIPITATION 12.0 9.0 3.0 10.0 6.5 1.0 1.0 7.0 0.0 6.0 8.2 10.0 12.0 DAY 7 7 27 1 24 1 31 30 ** 26 1 15 DAY WITH THUNDER STORM 0 1 0 1 0 0 1 0 0 1 1 0 5 DAYS WITH SNOW OR SLEET 14 0 0 0 0 0 0 0 0 0 0 0 14 DAYS WITH DUST 0 0 0 1 0 2 0 0 0 0 0 0 3 WIND DIRECTION (PREVAILING) 360 270 180 180 225 45 45 360 315 315 315 270 315 PREVAILING WIND SPEED(KNOTS) 10.0 17.0 9.5 8.7 7.1 7.4 8.8 10.7 9.1 7.3 5.4 7.0 9.7 PREVAILING WIND PERCENT 0.5 1.8 5.9 8.3 8.1 3.9 4.8 5.9 4.4 5.1 5.8 3.2 3.7 CALMS PERCENT OF WIND 99.5 95.2 82.8 76.7 68.3 87.8 83.3 84.9 89.4 81.3 89.2 92.7 86.0 NO. OF WIND OBSERVATION 186 168 186 180 186 180 186 186 180 235 240 248 2361 VECTOR WIND DIRECTION (MEAN) 360 309 240 233 282 1 1 328 311 280 304 299 302 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.8 0.8 0.9 1.2 0.5 1.1 1.3 0.5 0.6 0.5 0.4 0.6 WIND STEADINESES (MEAN %) 100.0 80.0 44.4 45.0 42.9 55.6 68.7 72.2 71.4 46.2 83.3 100.0 50.0 WIND SPEED (MEAN KNOTS) 0.1 1.0 1.8 2.0 2.8 0.9 1.6 1.8 0.7 1.3 0.6 0.4 1.2 FASTEST WIND DIRECTION 360 330 340 280 240 340 360 270 310 310 330 290 330 FASTEST WIND SPEED (KNOTS) 10 30 20 20 25 15 25 25 15 20 10 15 30 DAY 13 25 23 16 18 2 17 19 6 6 9 24 DAYS WITH SKY CLEAR (0-2)/8 1 15 15 9 11 28 26 28 29 15 18 12 207 DAYS WITH P.CLOUDY (3-6)/8 13 10 11 13 18 2 5 3 1 10 9 13 108 DAYS WITH CLOUDY (7-8)/8 17 3 5 8 2 0 0 0 0 6 3 6 50 DAYS WITH VISIBILITY =< 2 KM 2 0 0 0 0 0 0 0 0 0 0 1 3 DURATION OF SUNSHINE HOURS 73.0 200.9 243.6 200.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 887.5 889.3 886.9 882.6 883.6 878.8 876.8 880.9 885.7 887.8 888.1 888.0 884.7 MAX. QFE PRESSURE IN HPA 895.5 896.2 896.8 889.0 889.0 885.4 881.8 887.0 890.8 896.2 897.2 896.7 897.2 DAY-HOUR 5- 6 15- 6 10- 6 2- 6 14- 6 7- 6 22- 6 23- 6 30- 6 24- 6 27- 6 13- 6 MIN. QFE PRESSURE IN HPA 880.3 877.6 878.3 872.6 878.2 871.2 871.4 871.5 880.5 878.9 878.7 880.0 871.2 DAY-HOUR 7-12 7-15 4-15 24-15 7-15 22-15 2-15 17-15 12-12 5-12 18- 0 22-12 MEAN QNH PRESSURE IN HPA 1016.3 1018.2 1015.6 1010.8 1011.8 1006.5 1004.3 1008.8 1014.2 1016.5 1016.9 1016.7 1013.1 MAX. QNH PRESSURE IN HPA 1025.2 1025.9 1026.6 1017.9 1017.9 1013.9 1009.9 1015.7 1019.9 1025.9 1027.1 1026.5 1027.1 DAY-HOUR 5- 6 15- 6 10- 6 2- 6 14- 6 7- 6 22- 6 23- 6 30- 6 24- 6 27- 6 13- 6 MIN. QNH PRESSURE IN HPA 1008.2 1005.2 1006.0 999.6 1005.8 998.0 998.3 998.4 1008.4 1006.6 1006.4 1007.9 998.0 DAY-HOUR 7-12 7-15 4-15 24-15 7-15 22-15 2-15 17-15 12-12 5-12 18- 0 22-12 MEAN QFF PRESSURE IN HPA 1020.6 ****** 1012.3 1006.2 1004.8 995.9 992.9 998.5 1005.8 1012.1 1015.1 1017.6 ****** MAX. QFF PRESSURE IN HPA 1030.0 ****** 1024.9 1015.9 1012.0 1004.6 998.2 1005.9 1011.7 1026.1 1026.5 1030.0 ****** DAY-HOUR 11- 6 **-** 10- 6 2- 6 29- 3 5- 6 31- 6 31- 6 30- 6 24- 6 27- 6 25- 6 MIN. QFF PRESSURE IN HPA 1011.2 ****** 1001.5 992.1 998.3 986.0 986.6 986.5 999.2 999.8 1003.5 1008.5 ****** DAY-HOUR 7-15 **-** 4-18 24-15 7-15 22-15 1-15 17-15 12-15 5-15 13-15 10- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 887.8 887.8 887.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 895.0 895.4 895.2 ****** DAY ** ** ** ** ** ** ** ** ** 24 27 13 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 882.6 878.7 881.2 ****** DAY ** ** ** ** ** ** ** ** ** 11 18 23 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.6 1016.6 1016.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1024.6 1025.0 1024.8 ****** DAY ** ** ** ** ** ** ** ** ** 24 27 13 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1010.8 1006.4 1009.2 ****** DAY ** ** ** ** ** ** ** ** ** 11 18 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1012.1 1014.5 1017.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1024.5 1024.2 1025.3 ****** DAY ** ** ** ** ** ** ** ** ** 24 27 13 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1002.9 1005.3 1009.8 ****** DAY ** ** ** ** ** ** ** ** ** 11 18 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 887.4 889.3 887.2 883.1 884.2 879.8 877.5 881.5 886.3 887.9 888.3 887.9 885.0 MAX. QFE PRESSURE IN HPA 894.2 895.0 895.8 888.2 888.4 884.6 881.4 886.3 890.2 895.2 896.0 895.2 896.0 DAY 5 15 10 2 29 6 22 23 29 24 27 13 MIN. QFE PRESSURE IN HPA 881.6 878.1 881.1 875.6 879.7 873.9 873.6 874.9 882.2 881.2 879.5 881.2 873.6 DAY 8 7 30 25 17 22 28 17 16 5 18 23 MEAN QNH PRESSURE IN HPA 1016.2 1018.2 1015.9 1011.3 1012.6 1007.6 1005.1 1009.6 1014.8 1016.7 1017.1 1016.7 1013.5 MAX. QNH PRESSURE IN HPA 1023.7 1024.6 1025.5 1017.0 1017.2 1013.0 1009.4 1014.9 1019.2 1024.8 1025.7 1024.8 1025.7 DAY 5 15 10 2 29 6 22 23 29 24 27 13 MIN. QNH PRESSURE IN HPA 1009.6 1005.7 1009.1 1002.9 1007.5 1001.0 1000.7 1002.2 1010.3 1009.2 1007.3 1009.2 1000.7 DAY 8 7 30 25 17 22 28 17 16 5 18 23 MEAN QFF PRESSURE IN HPA 1020.5 1018.9 1012.8 1006.8 1005.6 997.1 993.7 999.2 1006.6 1012.3 1015.9 1018.1 1009.0 MAX. QFF PRESSURE IN HPA 1029.6 1025.2 1023.5 1015.1 1012.0 1004.5 997.7 1004.3 1011.1 1025.5 1025.8 1026.8 1029.6 DAY 11 3 10 2 29 2 31 23 29 24 27 13 MIN. QFF PRESSURE IN HPA 1013.6 1005.8 1003.5 996.3 999.1 989.3 988.5 990.6 1001.4 1002.1 1007.3 1010.0 988.5 DAY 8 25 30 25 17 23 28 17 12 5 12 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 888.5 890.3 888.4 883.8 884.8 880.3 878.1 882.3 887.1 889.0 889.4 889.1 885.9 MAX. QFE PRESSURE IN HPA 895.5 896.2 896.8 889.0 889.0 885.4 881.8 887.0 890.8 896.2 897.2 896.7 897.2 DAY 5 15 10 2 14 7 22 23 30 24 27 13 MIN. QFE PRESSURE IN HPA 882.5 878.2 880.9 876.2 880.5 874.4 873.9 875.0 883.0 881.8 881.0 882.3 873.9 DAY 20 7 30 25 17 22 2 17 16 5 18 23 MEAN QNH PRESSURE IN HPA 1017.3 1019.4 1017.2 1012.1 1013.2 1008.2 1005.7 1010.4 1015.8 1017.9 1018.4 1018.0 1014.5 MAX. QNH PRESSURE IN HPA 1025.2 1025.9 1026.6 1017.9 1017.9 1013.9 1009.9 1015.7 1019.9 1025.9 1027.1 1026.5 1027.1 DAY 5 15 10 2 14 7 22 23 30 24 27 13 MIN. QNH PRESSURE IN HPA 1010.6 1005.8 1008.9 1003.6 1008.4 1001.6 1001.0 1002.3 1011.2 1009.9 1009.0 1010.4 1001.0 DAY 20 7 30 25 17 22 2 17 16 5 18 23 MEAN QFF PRESSURE IN HPA 1021.4 1019.9 1013.7 1007.2 1005.8 997.5 994.2 999.8 1007.1 1013.0 1016.7 1019.1 1009.6 MAX. QFF PRESSURE IN HPA 1030.0 1026.0 1024.9 1015.9 1011.8 1004.6 998.2 1005.9 1011.7 1026.1 1026.5 1030.0 1030.0 DAY 11 3 10 2 29 5 31 31 30 24 27 25 MIN. QFF PRESSURE IN HPA 1014.0 1006.6 1003.4 996.6 1000.1 990.0 989.6 990.2 1001.6 1001.8 1008.2 1010.6 989.6 DAY 20 7 30 25 17 22 28 17 12 5 18 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 888.0 890.1 887.7 883.1 884.2 879.6 877.4 881.7 886.3 888.2 888.5 888.3 885.3 MAX. QFE PRESSURE IN HPA 895.1 895.9 895.7 888.9 888.6 884.6 880.7 886.7 890.5 895.0 896.1 896.3 896.3 DAY 5 15 10 2 29 6 21 23 30 24 27 13 MIN. QFE PRESSURE IN HPA 882.1 878.2 880.0 875.7 880.1 873.6 873.0 874.1 882.2 880.5 880.7 881.3 873.0 DAY 20 7 30 24 7 22 2 17 12 5 18 22 MEAN QNH PRESSURE IN HPA 1016.8 1019.1 1016.5 1011.3 1012.6 1007.4 1005.0 1009.7 1014.9 1017.0 1017.4 1017.1 1013.7 MAX. QNH PRESSURE IN HPA 1024.7 1025.6 1025.4 1017.8 1017.5 1013.0 1008.6 1015.3 1019.6 1024.6 1025.8 1026.0 1026.0 DAY 5 15 10 2 29 6 21 23 30 24 27 13 MIN. QNH PRESSURE IN HPA 1010.2 1005.8 1007.9 1003.1 1008.0 1000.7 1000.0 1001.3 1010.3 1008.4 1008.6 1009.3 1000.0 DAY 20 7 30 24 7 22 2 17 12 5 18 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1012.8 1014.9 1017.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.8 1024.7 1029.0 ****** DAY ** ** ** ** ** ** ** ** ** 24 27 25 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1004.3 1007.4 1008.5 ****** DAY ** ** ** ** ** ** ** ** ** 10 18 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 886.8 888.6 885.7 881.5 882.5 877.7 875.9 879.9 884.6 886.8 887.3 887.2 883.7 MAX. QFE PRESSURE IN HPA 893.8 894.2 893.7 887.5 887.8 882.7 879.3 884.8 889.1 892.9 894.5 894.5 894.5 DAY 5 15 9 2 28 6 21 23 30 23 27 18 MIN. QFE PRESSURE IN HPA 880.3 878.3 879.0 873.8 878.4 871.9 872.2 872.1 880.5 878.9 880.3 880.0 871.9 DAY 7 7 27 24 7 22 2 17 12 5 13 22 MEAN QNH PRESSURE IN HPA 1015.4 1017.4 1014.2 1009.6 1010.6 1005.3 1003.2 1007.7 1013.0 1015.5 1016.0 1015.9 1012.0 MAX. QNH PRESSURE IN HPA 1023.3 1023.7 1023.2 1016.2 1016.6 1010.9 1007.1 1013.2 1018.0 1022.3 1024.0 1024.0 1024.0 DAY 5 15 9 2 28 6 21 23 30 23 27 18 MIN. QNH PRESSURE IN HPA 1008.2 1006.0 1006.7 1000.9 1006.1 998.8 999.1 999.0 1008.4 1006.6 1008.2 1007.9 998.8 DAY 7 7 27 24 7 22 2 17 12 5 13 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1011.4 1013.8 1016.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1021.0 1023.6 1026.6 ****** DAY ** ** ** ** ** ** ** ** ** 24 27 25 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1001.7 1004.3 1008.5 ****** DAY ** ** ** ** ** ** ** ** ** 10 13 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 887.0 888.5 885.7 881.5 882.3 877.1 875.4 879.4 884.4 886.8 887.5 887.4 883.6 MAX. QFE PRESSURE IN HPA 893.9 893.9 894.5 887.2 887.4 882.3 878.7 884.4 888.7 892.9 894.3 894.8 894.8 DAY 5 15 9 1 28 6 22 23 30 23 27 18 MIN. QFE PRESSURE IN HPA 880.3 877.6 878.3 872.6 878.2 871.2 871.4 871.5 880.5 879.1 879.0 880.0 871.2 DAY 7 7 4 24 7 22 2 17 12 5 13 22 MEAN QNH PRESSURE IN HPA 1015.7 1017.3 1014.2 1009.6 1010.4 1004.6 1002.7 1007.1 1012.8 1015.4 1016.2 1016.1 1011.8 MAX. QNH PRESSURE IN HPA 1023.4 1023.4 1024.0 1015.9 1016.1 1010.4 1006.4 1012.8 1017.6 1022.3 1023.8 1024.4 1024.4 DAY 5 15 9 1 28 6 22 23 30 23 27 18 MIN. QNH PRESSURE IN HPA 1008.2 1005.2 1006.0 999.6 1005.8 998.0 998.3 998.4 1008.4 1006.9 1006.7 1007.9 998.0 DAY 7 7 4 24 7 22 2 17 12 5 13 22 MEAN QFF PRESSURE IN HPA 1020.0 1017.8 1010.9 1005.0 1003.4 994.1 991.2 996.7 1004.4 1011.1 1014.9 1017.5 1007.3 MAX. QFF PRESSURE IN HPA 1027.3 1023.3 1022.4 1013.8 1010.3 1001.1 996.1 1002.2 1009.6 1021.6 1024.4 1026.5 1027.3 DAY 11 3 9 1 28 5 31 31 30 24 27 13 MIN. QFF PRESSURE IN HPA 1011.2 1006.6 1001.7 992.1 998.3 986.0 986.6 986.5 999.2 999.8 1003.5 1008.7 986.0 DAY 7 7 4 24 7 22 1 17 12 5 13 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 887.6 889.1 886.8 882.5 883.4 878.2 876.6 880.7 885.6 887.7 888.2 888.2 884.6 MAX. QFE PRESSURE IN HPA 893.9 894.7 896.3 888.2 887.8 883.6 879.9 885.6 890.2 894.6 894.5 895.7 896.3 DAY 5 15 9 1 28 5 31 23 30 23 26 18 MIN. QFE PRESSURE IN HPA 880.3 878.6 878.7 873.7 879.7 872.1 871.9 873.2 881.9 881.5 880.5 881.3 871.9 DAY 7 7 4 24 25 22 2 17 15 5 17 23 MEAN QNH PRESSURE IN HPA 1016.3 1018.0 1015.5 1010.7 1011.7 1005.9 1004.1 1008.7 1014.1 1016.5 1017.0 1017.0 1013.0 MAX. QNH PRESSURE IN HPA 1023.4 1024.3 1026.0 1017.0 1016.6 1011.9 1007.7 1014.1 1019.2 1024.2 1024.0 1025.4 1026.0 DAY 5 15 9 1 28 5 31 23 30 23 26 18 MIN. QNH PRESSURE IN HPA 1008.2 1006.3 1006.4 1000.8 1007.5 999.0 998.8 1000.3 1010.0 1009.5 1008.4 1009.3 998.8 DAY 7 7 4 24 25 22 2 17 15 5 17 23 MEAN QFF PRESSURE IN HPA 1020.4 1018.4 1011.9 1005.7 1004.3 995.1 992.6 998.2 1005.5 1011.8 1015.3 1018.1 1008.1 MAX. QFF PRESSURE IN HPA 1028.0 1024.3 1024.0 1014.4 1010.4 1003.0 997.3 1004.4 1011.0 1023.9 1023.7 1026.6 1028.0 DAY 10 2 9 1 28 5 31 30 30 23 27 18 MIN. QFF PRESSURE IN HPA 1011.2 1007.7 1001.5 992.8 999.3 987.0 987.3 988.4 1000.4 1001.9 1006.1 1010.2 987.0 DAY 7 7 4 24 15 22 2 17 12 5 13 22 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 888.1 888.1 888.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 895.0 895.3 895.0 ****** DAY ** ** ** ** ** ** ** ** ** 23 26 18 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 883.2 879.5 881.3 ****** DAY ** ** ** ** ** ** ** ** ** 10 17 23 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1016.9 1016.8 1016.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1024.6 1024.9 1024.6 ****** DAY ** ** ** ** ** ** ** ** ** 23 26 18 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1011.4 1007.3 1009.3 ****** DAY ** ** ** ** ** ** ** ** ** 10 17 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1012.4 1014.5 1017.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1024.4 1023.6 1025.2 ****** DAY ** ** ** ** ** ** ** ** ** 23 26 25 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1004.2 1005.7 1009.8 ****** DAY ** ** ** ** ** ** ** ** ** 10 17 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.0 7.1 12.2 18.4 22.6 27.5 30.0 29.8 26.8 20.1 8.4 7.2 17.8 MINIMUN AIR TEMPERATURE (C) -1.0 1.6 5.5 10.9 15.7 19.9 22.3 21.8 19.0 13.1 2.7 1.7 11.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 14 20 28 5 0 0 0 67 DAYS WITH MINIMUM TEMP. <=-4 6 0 0 0 0 0 0 0 0 0 0 1 7 DAYS WITH FREEZING MIN.<= 0 20 11 1 0 0 0 0 0 0 0 9 16 57 TEMPERATURE RECORDS LOWEST(C) -6.0 -3.0 0.0 3.0 6.0 12.0 17.0 20.0 15.0 9.0 -1.0 -4.0 -6.0 DAY 14 6 8 16 3 3 9 29 29 7 20 25 MAXIMUM AIR TEMPERATURE (C) 10.4 13.9 19.6 25.6 29.7 34.1 37.5 37.5 35.1 27.6 15.2 13.8 25.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 22 28 31 31 30 4 0 0 149 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 14.0 21.0 27.0 30.0 35.0 40.0 43.0 40.0 37.0 34.0 22.0 20.0 43.0 DAY 3 22 31 9 27 30 1 13 1 1 1 12 DIF. BETWEEN (MAX.-MIN.) (C) 11.4 12.3 14.1 14.7 14.0 14.2 15.2 15.7 16.1 14.5 12.5 12.1 13.9 MEAN DAILY TEMP. (MDT) (C) 4.7 7.7 12.5 18.3 22.7 27.0 29.9 29.6 27.0 20.4 8.9 7.7 18.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 4.0 83.5 182.5 275.5 268.0 181.0 11.5 0.0 0.0 1006.0 HEATING DEG. DAYS(BASE 18 0C) 412.5 287.5 171.0 25.5 12.0 0.0 0.0 0.0 0.0 1.0 271.5 318.5 1499.5 DEWPOINT (MEAN C) -2.8 -1.3 -0.2 2.0 5.2 7.9 9.5 9.4 7.3 6.2 -0.3 0.4 3.6 MIXING RATIO (G/KG) 3.59 4.03 4.34 5.19 6.42 7.80 8.62 8.60 7.46 6.79 4.32 4.65 5.98 VAPOUR PRESSURE (HPA) 5.09 5.71 6.12 7.29 9.01 10.87 12.03 12.01 10.48 9.59 6.12 6.58 8.41 SATURATION DEF. (HPA) 3.39 4.95 9.03 14.93 19.99 27.24 32.23 31.56 26.44 14.98 5.35 3.98 16.17 RELATIVE HUMIDITY (MEAN %) 63 58 46 37 35 30 29 29 31 41 56 65 43 RELATIVE HUMIDITY (MAX. %) 81 75 64 55 51 41 39 40 40 54 72 80 58 RELATIVE HUMIDITY (MIN. %) 43 39 29 21 23 21 21 20 22 30 40 47 30 RELATIVE HUMIDITY (MEAN% 03UTC) 76 73 60 50 48 39 37 39 38 50 69 76 55 RELATIVE HUMIDITY (MEAN% 09UTC) 47 45 36 28 26 24 24 23 24 31 42 52 34 RELATIVE HUMIDITY (MEAN% 15UTC) 55 47 33 26 27 25 24 23 28 39 53 62 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 10.9 21.3 9.5 16.4 18.0 1.0 0.0 0.0 0.0 7.1 10.8 7.1 102.1 DAYS WITH PRECIPITATION >=10 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH PRECIPITATION >= 5 1 2 1 2 2 0 0 0 0 1 0 0 9 DAYS WITH PRECIPITATION >= 1 3 4 2 5 6 1 0 0 0 1 5 4 31 DAYS WITH PRECIPITATION 7 6 4 7 8 2 0 0 0 2 7 6 49 GREATEST DAILY PRECIPITATION 5.3 13.0 5.0 6.0 7.0 1.0 0.0 0.0 0.0 7.0 4.0 3.0 13.0 DAY 11 12 6 19 20 18 ** ** ** 22 13 3 DAY WITH THUNDER STORM 0 2 0 4 5 0 0 0 0 1 0 0 12 DAYS WITH SNOW OR SLEET 1 2 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 0 0 1 3 1 0 1 0 0 0 0 6 WIND DIRECTION (PREVAILING) 315 315 360 225 360 360 360 315 315 315 315 315 360 PREVAILING WIND SPEED(KNOTS) 6.4 7.6 9.8 12.1 14.6 12.0 14.5 7.7 8.1 8.5 6.9 8.0 12.0 PREVAILING WIND PERCENT 6.0 8.5 9.7 18.3 14.9 13.8 19.8 7.7 10.9 18.5 10.8 4.8 9.4 CALMS PERCENT OF WIND 88.3 79.0 73.8 59.6 63.3 65.0 56.5 77.8 77.4 62.1 78.8 89.1 72.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 239 248 240 248 2919 VECTOR WIND DIRECTION (MEAN) 328 320 312 257 345 4 26 1 347 325 336 337 341 VECTOR WIND MAGNITUDE(KNOTS) 0.7 1.2 1.5 2.7 2.6 2.3 4.4 1.5 1.7 2.6 1.4 0.7 1.6 WIND STEADINESES (MEAN %) 87.5 63.2 60.0 60.0 61.9 59.0 80.0 71.4 81.0 76.5 77.8 77.8 57.1 WIND SPEED (MEAN KNOTS) 0.8 1.9 2.5 4.5 4.2 3.9 5.5 2.1 2.1 3.4 1.8 0.9 2.8 FASTEST WIND DIRECTION 270 340 30 210 360 360 360 340 360 340 360 320 360 FASTEST WIND SPEED (KNOTS) 18 28 22 25 45 25 25 20 20 20 25 25 45 DAY 4 4 15 11 23 18 6 9 15 1 1 10 DAYS WITH SKY CLEAR (0-2)/8 16 11 18 12 18 27 28 30 30 20 15 13 238 DAYS WITH P.CLOUDY (3-6)/8 10 12 10 15 10 3 3 1 0 11 11 11 97 DAYS WITH CLOUDY (7-8)/8 5 5 3 3 3 0 0 0 0 0 4 7 30 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 0 1 1 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 888.1 886.9 884.1 880.9 881.4 879.0 880.7 880.5 883.9 888.8 889.8 887.3 884.3 MAX. QFE PRESSURE IN HPA 897.7 897.1 892.6 887.4 890.9 888.2 887.6 885.1 890.5 895.2 898.6 899.8 899.8 DAY-HOUR 13- 6 6- 6 20- 6 16- 6 3- 6 8- 9 8- 6 21- 6 28- 6 11- 6 27- 6 24- 6 MIN. QFE PRESSURE IN HPA 876.0 878.4 871.4 870.3 870.9 868.9 870.3 875.7 877.0 880.9 881.0 874.8 868.9 DAY-HOUR 21-12 11-21 13-12 25-15 7-15 21-15 1-15 5-15 1-15 1- 0 1- 9 16-12 MEAN QNH PRESSURE IN HPA 1016.8 1015.6 1012.4 1008.8 1009.5 1006.7 1008.7 1008.4 1012.2 1017.6 1018.8 1016.0 1012.6 MAX. QNH PRESSURE IN HPA 1027.6 1026.9 1021.9 1016.1 1020.0 1017.0 1016.3 1013.6 1019.6 1024.8 1028.6 1030.0 1030.0 DAY-HOUR 13- 6 6- 6 20- 6 16- 6 3- 6 8- 9 8- 6 21- 6 28- 6 11- 6 27- 6 24- 6 MIN. QNH PRESSURE IN HPA 1003.4 1006.1 998.3 997.0 997.7 995.5 997.0 1003.1 1004.5 1008.9 1009.0 1002.1 995.5 DAY-HOUR 21-12 11-21 13-12 25-15 7-15 21-15 1-15 5-15 1-15 1- 0 1- 9 16-12 MEAN QFF PRESSURE IN HPA 1018.6 1015.8 1010.1 1003.5 1002.2 997.3 998.1 997.9 1003.2 1011.6 1018.4 1016.1 1007.7 MAX. QFF PRESSURE IN HPA 1031.0 1030.3 1021.2 1015.6 1017.5 1008.1 1008.9 1003.6 1012.5 1019.4 1030.2 1032.0 1032.0 DAY-HOUR 13- 6 6- 6 20- 6 16- 3 3- 6 4- 6 8- 3 30- 6 28- 6 11- 3 26- 3 24- 6 MIN. QFF PRESSURE IN HPA 1003.2 1003.6 994.2 989.9 989.6 985.5 984.3 992.7 994.9 1001.0 1003.6 1000.6 984.3 DAY-HOUR 21-12 22-12 13-12 25-15 29-21 21-12 1-15 6-12 2- 0 1- 0 1- 9 16-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 887.8 886.7 884.1 880.8 881.5 879.0 880.7 880.4 883.7 888.5 889.6 887.0 884.1 MAX. QFE PRESSURE IN HPA 895.8 895.5 890.7 884.3 889.8 887.1 886.9 883.3 888.6 894.3 897.8 897.0 897.8 DAY 13 6 20 3 3 9 8 30 28 11 27 24 MIN. QFE PRESSURE IN HPA 879.4 879.0 875.5 876.8 872.0 870.0 871.8 877.5 877.2 880.9 882.3 878.2 870.0 DAY 21 12 25 26 30 22 2 6 2 1 13 16 MEAN QNH PRESSURE IN HPA 1016.6 1015.3 1012.5 1008.7 1009.5 1006.7 1008.7 1008.3 1012.0 1017.3 1018.5 1015.6 1012.5 MAX. QNH PRESSURE IN HPA 1025.5 1025.2 1019.8 1012.7 1018.8 1015.8 1015.6 1011.5 1017.5 1023.8 1027.7 1026.8 1027.7 DAY 13 6 20 3 3 9 8 30 28 11 27 24 MIN. QNH PRESSURE IN HPA 1007.2 1006.7 1002.8 1004.3 998.9 996.7 998.7 1005.1 1004.7 1008.9 1010.4 1005.8 996.7 DAY 21 12 25 26 30 22 2 6 2 1 13 16 MEAN QFF PRESSURE IN HPA 1017.9 1015.2 1009.9 1003.3 1002.2 997.3 998.0 997.6 1002.6 1011.0 1017.8 1015.3 1007.3 MAX. QFF PRESSURE IN HPA 1029.2 1026.8 1017.8 1011.1 1016.3 1006.6 1007.3 1001.6 1009.7 1017.7 1028.0 1027.7 1029.2 DAY 13 6 20 16 3 9 8 30 28 11 27 24 MIN. QFF PRESSURE IN HPA 1007.6 1004.3 998.0 997.3 990.4 986.5 985.8 993.8 994.9 1001.0 1006.8 1003.8 985.8 DAY 26 22 25 25 30 22 2 6 2 1 1 17 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 888.0 887.0 884.4 881.5 882.2 879.8 881.5 881.2 884.4 889.0 890.0 887.3 884.7 MAX. QFE PRESSURE IN HPA 896.2 895.9 891.1 886.7 890.4 886.7 887.4 883.9 889.4 894.5 897.8 898.0 898.0 DAY 13 6 20 16 3 9 8 16 28 11 26 24 MIN. QFE PRESSURE IN HPA 877.7 880.0 875.3 876.0 872.8 870.7 872.2 878.4 878.7 881.2 882.7 876.5 870.7 DAY 21 22 13 25 30 22 2 14 2 1 13 16 MEAN QNH PRESSURE IN HPA 1016.8 1015.7 1012.7 1009.5 1010.3 1007.7 1009.5 1009.2 1012.8 1017.9 1019.1 1016.0 1013.1 MAX. QNH PRESSURE IN HPA 1025.9 1025.6 1020.2 1015.3 1019.5 1015.3 1016.1 1012.2 1018.4 1024.0 1027.7 1027.9 1027.9 DAY 13 6 20 16 3 9 8 16 28 11 26 24 MIN. QNH PRESSURE IN HPA 1005.3 1007.9 1002.6 1003.4 999.8 997.5 999.1 1006.1 1006.4 1009.2 1010.9 1003.9 997.5 DAY 21 22 13 25 30 22 2 14 2 1 13 16 MEAN QFF PRESSURE IN HPA 1019.2 1016.4 1010.9 1004.7 1003.6 998.6 999.3 999.2 1004.4 1012.6 1019.4 1016.8 1008.8 MAX. QFF PRESSURE IN HPA 1030.6 1028.6 1019.8 1015.6 1017.4 1007.2 1008.9 1002.9 1011.2 1019.4 1030.2 1031.0 1031.0 DAY 13 6 20 16 3 4 8 30 28 11 26 24 MIN. QFF PRESSURE IN HPA 1007.0 1005.6 998.7 996.4 991.6 987.7 986.2 995.6 997.3 1001.5 1007.5 1004.9 986.2 DAY 21 22 13 25 30 22 2 14 2 1 1 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 889.2 888.3 885.5 882.4 882.8 880.3 882.1 882.0 885.4 890.1 891.1 888.6 885.7 MAX. QFE PRESSURE IN HPA 897.7 897.1 892.6 887.4 890.9 888.0 887.6 885.1 890.5 895.2 898.6 899.8 899.8 DAY 13 6 20 16 3 8 8 21 28 11 27 24 MIN. QFE PRESSURE IN HPA 877.3 881.3 875.5 875.2 872.4 870.9 873.0 879.0 879.5 883.1 883.3 877.0 870.9 DAY 21 22 13 25 30 22 2 5 2 1 1 16 MEAN QNH PRESSURE IN HPA 1018.1 1017.1 1014.0 1010.5 1011.0 1008.2 1010.2 1010.1 1013.9 1019.2 1020.3 1017.4 1014.2 MAX. QNH PRESSURE IN HPA 1027.6 1026.9 1021.9 1016.1 1020.0 1016.8 1016.3 1013.6 1019.6 1024.8 1028.6 1030.0 1030.0 DAY 13 6 20 16 3 8 8 21 28 11 27 24 MIN. QNH PRESSURE IN HPA 1004.8 1009.3 1002.8 1002.5 999.4 997.7 1000.0 1006.7 1007.3 1011.3 1011.5 1004.5 997.7 DAY 21 22 13 25 30 22 2 5 2 1 1 16 MEAN QFF PRESSURE IN HPA 1020.3 1017.6 1012.0 1005.3 1003.9 998.8 999.7 999.8 1005.0 1013.1 1019.8 1017.8 1009.4 MAX. QFF PRESSURE IN HPA 1031.0 1030.3 1021.2 1014.7 1017.5 1008.1 1008.9 1003.6 1012.5 1019.2 1029.2 1032.0 1032.0 DAY 13 6 20 16 3 4 8 30 28 11 27 24 MIN. QFF PRESSURE IN HPA 1006.0 1006.5 999.6 995.2 990.8 988.2 987.2 996.0 998.4 1003.3 1006.5 1004.6 987.2 DAY 21 22 13 25 30 22 2 5 2 1 1 16 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 888.5 887.9 884.9 881.5 882.0 879.7 881.2 881.2 884.6 889.2 890.0 887.7 884.9 MAX. QFE PRESSURE IN HPA 896.6 896.9 891.4 886.6 889.4 888.2 887.0 884.7 889.7 894.6 897.8 899.3 899.3 DAY 13 6 20 16 3 8 8 21 28 10 26 24 MIN. QFE PRESSURE IN HPA 877.4 880.9 873.0 874.3 872.0 870.1 873.0 877.8 878.8 883.3 881.0 875.5 870.1 DAY 21 22 13 25 30 22 1 5 2 1 1 16 MEAN QNH PRESSURE IN HPA 1017.4 1016.6 1013.3 1009.6 1010.1 1007.5 1009.2 1009.2 1013.0 1018.2 1019.0 1016.4 1013.3 MAX. QNH PRESSURE IN HPA 1026.4 1026.7 1020.6 1015.2 1018.4 1017.0 1015.7 1013.1 1018.7 1024.2 1027.7 1029.4 1029.4 DAY 13 6 20 16 3 8 8 21 28 10 26 24 MIN. QNH PRESSURE IN HPA 1005.0 1008.9 1000.0 1001.5 998.9 996.8 1000.0 1005.4 1006.5 1011.5 1009.0 1002.8 996.8 DAY 21 22 13 25 30 22 1 5 2 1 1 16 MEAN QFF PRESSURE IN HPA 1018.6 1016.4 1010.6 1003.8 1002.4 997.8 998.4 998.3 1003.4 1011.6 1017.9 1015.9 1007.9 MAX. QFF PRESSURE IN HPA 1028.9 1028.6 1019.1 1012.5 1014.9 1007.2 1007.4 1002.5 1011.0 1017.3 1027.7 1030.7 1030.7 DAY 13 6 20 16 3 4 8 30 28 10 26 24 MIN. QFF PRESSURE IN HPA 1006.2 1004.9 996.6 994.1 989.7 987.5 986.7 994.2 996.7 1002.8 1003.6 1001.5 986.7 DAY 21 22 13 25 30 22 1 5 2 1 1 16 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 887.2 886.1 883.1 879.7 880.5 878.0 879.5 879.4 882.9 887.8 888.9 886.5 883.3 MAX. QFE PRESSURE IN HPA 895.4 894.4 889.0 885.2 888.0 887.2 885.4 883.1 887.6 893.7 897.2 897.1 897.2 DAY 13 6 20 16 3 8 8 21 28 10 26 24 MIN. QFE PRESSURE IN HPA 876.0 879.2 871.4 871.0 872.0 869.4 871.0 876.5 877.7 882.5 881.8 874.8 869.4 DAY 21 22 13 25 30 21 1 5 1 1 8 16 MEAN QNH PRESSURE IN HPA 1015.9 1014.6 1011.3 1007.6 1008.4 1005.7 1007.3 1007.1 1011.1 1016.6 1017.8 1015.1 1011.5 MAX. QNH PRESSURE IN HPA 1025.0 1023.9 1017.9 1013.7 1016.8 1015.9 1013.9 1011.3 1016.3 1023.2 1027.1 1026.9 1027.1 DAY 13 6 20 16 3 8 8 21 28 10 26 24 MIN. QNH PRESSURE IN HPA 1003.4 1007.0 998.3 997.8 998.9 996.0 997.8 1003.9 1005.3 1010.6 1009.9 1002.1 996.0 DAY 21 22 13 25 30 21 1 5 1 1 8 16 MEAN QFF PRESSURE IN HPA 1017.2 1014.4 1008.6 1002.1 1001.0 996.1 996.4 996.4 1001.5 1010.2 1017.0 1014.8 1006.3 MAX. QFF PRESSURE IN HPA 1028.2 1026.4 1016.3 1010.7 1014.9 1006.1 1005.4 1000.6 1008.7 1016.6 1027.3 1028.8 1028.8 DAY 13 6 20 16 3 8 8 21 28 10 26 24 MIN. QFF PRESSURE IN HPA 1003.2 1003.6 994.2 990.9 990.3 985.5 984.7 992.7 995.5 1002.6 1005.7 1000.6 984.7 DAY 21 22 13 25 30 21 1 6 1 1 1 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 887.5 886.1 883.0 879.5 880.1 877.5 879.2 879.0 882.7 887.9 889.1 886.9 883.2 MAX. QFE PRESSURE IN HPA 895.4 894.1 888.8 884.7 888.0 886.1 885.1 882.8 887.1 893.7 897.2 897.1 897.2 DAY 13 6 19 16 3 8 7 21 28 10 26 24 MIN. QFE PRESSURE IN HPA 876.9 879.4 872.2 870.3 870.9 868.9 870.3 875.7 877.0 882.5 881.8 875.7 868.9 DAY 21 22 13 25 7 21 1 5 1 1 8 16 MEAN QNH PRESSURE IN HPA 1016.2 1014.6 1011.2 1007.3 1008.0 1005.1 1007.0 1006.7 1010.9 1016.6 1018.0 1015.5 1011.4 MAX. QNH PRESSURE IN HPA 1025.0 1023.6 1017.7 1013.1 1016.8 1014.7 1013.6 1011.0 1015.8 1023.2 1027.1 1026.9 1027.1 DAY 13 6 19 16 3 8 7 21 28 10 26 24 MIN. QNH PRESSURE IN HPA 1004.4 1007.2 999.1 997.0 997.7 995.5 997.0 1003.1 1004.5 1010.6 1009.9 1003.1 995.5 DAY 21 22 13 25 7 21 1 5 1 1 8 16 MEAN QFF PRESSURE IN HPA 1018.6 1015.2 1009.2 1002.5 1001.2 996.0 996.7 996.6 1002.3 1011.2 1018.4 1016.3 1007.0 MAX. QFF PRESSURE IN HPA 1029.2 1027.0 1016.9 1011.2 1016.0 1005.9 1005.6 1001.0 1009.1 1017.3 1029.0 1030.1 1030.1 DAY 13 6 20 16 3 8 7 21 28 10 26 24 MIN. QFF PRESSURE IN HPA 1005.6 1004.8 996.0 989.9 990.0 985.5 984.3 992.7 995.3 1002.4 1008.3 1002.9 984.3 DAY 21 22 13 25 7 21 1 5 1 1 1 16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 888.2 886.8 883.9 880.8 881.2 878.8 880.7 880.4 883.8 888.8 889.9 887.4 884.2 MAX. QFE PRESSURE IN HPA 895.4 895.5 890.4 885.4 888.3 887.0 886.5 883.6 888.5 895.1 897.6 897.1 897.6 DAY 13 5 19 16 2 8 7 15 26 10 26 24 MIN. QFE PRESSURE IN HPA 879.1 880.0 875.5 874.1 871.6 868.9 871.2 877.0 877.9 884.6 883.9 877.3 868.9 DAY 21 22 13 25 29 21 1 5 1 29 12 16 MEAN QNH PRESSURE IN HPA 1017.0 1015.4 1012.2 1008.8 1009.2 1006.5 1008.7 1008.3 1012.2 1017.7 1018.9 1016.1 1012.6 MAX. QNH PRESSURE IN HPA 1025.0 1025.2 1019.5 1013.9 1017.1 1015.7 1015.1 1011.9 1017.3 1024.7 1027.5 1026.9 1027.5 DAY 13 5 19 16 2 8 7 15 26 10 26 24 MIN. QNH PRESSURE IN HPA 1006.9 1007.9 1002.8 1001.3 998.5 995.5 998.0 1004.5 1005.5 1013.0 1012.2 1004.8 995.5 DAY 21 22 13 25 29 21 1 5 1 29 12 16 MEAN QFF PRESSURE IN HPA 1019.1 1015.8 1010.1 1003.5 1002.1 997.1 998.3 998.1 1003.4 1011.7 1018.6 1016.5 1007.8 MAX. QFF PRESSURE IN HPA 1028.5 1027.2 1018.4 1011.5 1015.1 1006.5 1007.0 1002.6 1010.2 1018.3 1028.5 1030.2 1030.2 DAY 13 5 19 16 2 4 7 30 28 10 26 24 MIN. QFF PRESSURE IN HPA 1008.2 1004.9 997.6 994.8 990.0 985.6 985.0 994.0 996.8 1005.2 1008.4 1004.5 985.0 DAY 4 22 24 25 29 21 1 5 1 1 1 16 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 888.1 887.0 884.1 881.0 881.4 879.1 881.2 880.5 884.0 888.9 890.0 887.3 884.4 MAX. QFE PRESSURE IN HPA 894.8 895.3 890.4 885.4 890.2 887.2 886.5 883.6 888.8 894.7 898.4 896.2 898.4 DAY 12 5 19 16 2 8 7 15 26 10 26 24 MIN. QFE PRESSURE IN HPA 880.1 878.4 875.5 876.1 872.0 869.0 871.8 877.4 878.5 884.1 883.0 877.7 869.0 DAY 21 11 24 25 29 21 1 5 1 31 12 16 MEAN QNH PRESSURE IN HPA 1016.9 1015.6 1012.4 1009.0 1009.4 1006.8 1009.2 1008.5 1012.3 1017.8 1019.0 1016.0 1012.7 MAX. QNH PRESSURE IN HPA 1024.4 1024.9 1019.5 1013.9 1019.2 1015.9 1015.1 1011.9 1017.7 1024.3 1028.4 1025.9 1028.4 DAY 12 5 19 16 2 8 7 15 26 10 26 24 MIN. QNH PRESSURE IN HPA 1008.0 1006.1 1002.8 1003.5 998.9 995.6 998.7 1005.0 1006.2 1012.4 1011.2 1005.3 995.6 DAY 21 11 24 25 29 21 1 5 1 31 12 16 MEAN QFF PRESSURE IN HPA 1018.1 1015.3 1009.6 1003.2 1001.8 997.1 998.5 997.7 1002.9 1011.3 1018.1 1015.6 1007.4 MAX. QFF PRESSURE IN HPA 1027.9 1026.2 1017.4 1010.5 1016.7 1006.3 1006.5 1001.9 1009.7 1017.9 1028.6 1028.2 1028.6 DAY 12 5 19 16 2 8 7 30 28 10 26 24 MIN. QFF PRESSURE IN HPA 1008.4 1005.7 996.7 997.2 989.6 985.6 985.3 994.0 996.7 1004.8 1008.9 1003.7 985.3 DAY 4 21 24 25 29 21 1 5 1 1 1 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.1 7.4 9.7 19.6 21.1 28.1 32.7 29.9 27.1 20.8 12.4 4.8 18.2 MINIMUN AIR TEMPERATURE (C) -0.2 1.2 3.5 12.4 13.5 20.3 24.2 19.3 19.0 14.7 5.6 0.6 11.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 15 31 11 10 0 0 0 67 DAYS WITH MINIMUM TEMP. <=-4 4 1 5 0 0 0 0 0 0 0 0 1 11 DAYS WITH FREEZING MIN.<= 0 19 13 8 0 0 0 0 0 0 0 1 12 53 TEMPERATURE RECORDS LOWEST(C) -5.0 -5.0 -6.0 3.0 5.0 16.0 21.0 15.0 14.0 9.0 0.0 -4.0 -6.0 DAY 27 19 5 30 1 2 26 5 22 27 30 22 MAXIMUM AIR TEMPERATURE (C) 11.3 14.4 16.8 26.5 27.5 34.7 39.7 35.7 34.4 28.8 20.1 10.8 25.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 9 12 29 31 31 29 15 0 0 156 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.0 20.0 24.0 33.0 33.0 39.0 43.0 39.0 39.0 33.0 26.0 17.0 43.0 DAY 5 16 18 4 23 30 9 18 9 14 2 3 DIF. BETWEEN (MAX.-MIN.) (C) 11.5 13.2 13.3 14.1 14.0 14.4 15.5 16.4 15.4 14.1 14.5 10.2 13.9 MEAN DAILY TEMP. (MDT) (C) 5.5 7.8 10.2 19.4 20.5 27.5 31.9 27.5 26.7 21.8 12.9 5.7 18.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 29.0 33.0 195.5 339.0 202.5 171.5 47.0 0.0 0.0 1017.5 HEATING DEG. DAYS(BASE 18 0C) 386.0 285.0 243.0 40.0 15.5 0.0 0.0 0.0 0.0 3.0 154.5 380.0 1507.0 DEWPOINT (MEAN C) -0.7 -0.1 -0.5 2.4 5.8 7.7 10.8 8.3 4.7 4.5 -1.6 -0.6 3.4 MIXING RATIO (G/KG) 4.19 4.47 4.48 5.36 6.70 7.58 9.49 8.02 6.24 6.06 4.15 4.22 5.91 VAPOUR PRESSURE (HPA) 5.94 6.30 6.31 7.54 9.43 10.62 13.22 11.23 8.81 8.56 5.90 5.97 8.32 SATURATION DEF. (HPA) 3.18 4.48 6.74 16.62 16.76 28.54 37.64 32.31 29.10 17.32 9.45 2.98 17.09 RELATIVE HUMIDITY (MEAN %) 69 62 53 34 39 29 28 27 26 37 41 71 43 RELATIVE HUMIDITY (MAX. %) 82 80 71 48 54 40 39 38 36 49 53 86 56 RELATIVE HUMIDITY (MIN. %) 52 40 35 22 28 20 19 21 17 24 29 51 30 RELATIVE HUMIDITY (MEAN% 03UTC) 75 77 64 46 49 39 37 37 34 45 50 80 53 RELATIVE HUMIDITY (MEAN% 09UTC) 56 51 41 25 31 23 22 22 19 26 31 54 33 RELATIVE HUMIDITY (MEAN% 15UTC) 66 52 44 27 33 22 22 24 25 35 40 73 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 55.4 12.1 40.8 0.0 8.6 0.2 0.0 1.0 1.0 3.3 3.0 40.5 165.9 DAYS WITH PRECIPITATION >=10 2 0 1 0 0 0 0 0 0 0 0 2 5 DAYS WITH PRECIPITATION >= 5 4 1 2 0 0 0 0 0 0 0 0 2 9 DAYS WITH PRECIPITATION >= 1 5 3 6 0 3 0 0 1 1 1 1 6 27 DAYS WITH PRECIPITATION 6 4 8 0 7 1 0 1 2 2 2 8 41 GREATEST DAILY PRECIPITATION 25.0 7.0 25.0 0.0 3.0 0.2 0.0 1.0 1.0 3.0 3.0 22.0 25.0 DAY 10 11 27 ** 7 17 ** 26 15 26 6 16 DAY WITH THUNDER STORM 0 0 0 0 2 1 0 0 3 0 0 0 6 DAYS WITH SNOW OR SLEET 1 1 2 0 0 0 0 0 0 0 0 0 4 DAYS WITH DUST 0 0 0 2 1 1 0 0 0 0 0 0 4 WIND DIRECTION (PREVAILING) 315 360 315 360 360 360 45 360 360 315 315 315 315 PREVAILING WIND SPEED(KNOTS) 6.8 15.9 7.8 15.7 12.6 10.9 10.9 14.5 13.8 8.4 6.7 6.2 8.0 PREVAILING WIND PERCENT 4.8 4.5 9.7 13.3 6.5 9.2 7.5 11.3 11.3 16.1 14.5 9.7 7.5 CALMS PERCENT OF WIND 91.1 91.1 78.2 51.7 80.2 69.2 81.3 73.1 70.8 68.5 82.7 85.1 77.0 NO. OF WIND OBSERVATION 248 224 248 240 248 240 241 186 195 248 214 248 2780 VECTOR WIND DIRECTION (MEAN) 308 332 331 312 332 11 29 7 347 312 326 330 339 VECTOR WIND MAGNITUDE(KNOTS) 0.5 0.8 1.2 3.2 1.2 1.4 1.4 2.2 2.2 1.6 1.0 0.8 1.3 WIND STEADINESES (MEAN %) 71.4 72.7 70.6 51.6 60.0 46.7 77.8 71.0 75.9 64.0 90.9 80.0 56.5 WIND SPEED (MEAN KNOTS) 0.7 1.1 1.7 6.2 2.0 3.0 1.8 3.1 2.9 2.5 1.1 1.0 2.3 FASTEST WIND DIRECTION 240 340 330 360 340 10 340 20 360 300 330 350 340 FASTEST WIND SPEED (KNOTS) 15 30 16 30 25 18 25 28 25 18 10 18 30 DAY 6 18 22 17 24 9 31 1 12 24 18 21 DAYS WITH SKY CLEAR (0-2)/8 15 9 10 13 10 23 29 28 25 23 24 16 225 DAYS WITH P.CLOUDY (3-6)/8 6 15 13 10 17 7 2 3 5 7 3 10 98 DAYS WITH CLOUDY (7-8)/8 10 4 8 7 4 0 0 0 0 1 3 5 42 DAYS WITH VISIBILITY =< 2 KM 0 0 1 1 0 0 0 0 0 1 0 6 9 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 887.8 884.4 884.7 884.0 885.1 881.9 880.3 882.7 887.1 887.7 890.6 887.4 885.3 MAX. QFE PRESSURE IN HPA 898.6 893.3 894.5 891.9 893.0 890.1 885.8 889.8 892.5 895.1 898.7 896.1 898.7 DAY-HOUR 18- 6 13- 9 5- 6 27- 6 20- 6 11- 6 22- 6 29- 6 24- 6 10- 6 13- 6 4- 6 MIN. QFE PRESSURE IN HPA 876.8 874.7 871.5 877.2 875.8 875.0 872.2 876.0 881.2 880.7 876.1 875.9 871.5 DAY-HOUR 7-12 11-12 27-12 12-12 16-15 23-15 6-15 14-15 5-15 4-15 29-12 16- 0 MEAN QNH PRESSURE IN HPA 1016.6 1012.8 1013.1 1012.3 1013.5 1010.0 1008.2 1010.8 1015.8 1016.5 1019.7 1016.1 1013.8 MAX. QNH PRESSURE IN HPA 1028.6 1022.7 1024.0 1021.1 1022.4 1019.1 1014.3 1018.8 1021.8 1024.7 1028.7 1025.8 1028.7 DAY-HOUR 18- 6 13- 9 5- 6 27- 6 20- 6 11- 6 22- 6 29- 6 24- 6 10- 6 13- 6 4- 6 MIN. QNH PRESSURE IN HPA 1004.3 1001.9 998.4 1004.7 1003.2 1002.3 999.1 1003.4 1009.2 1008.6 1003.5 1003.3 998.4 DAY-HOUR 7-12 11-12 27-12 12-12 16-15 23-15 6-15 14-15 5-15 4-15 29-12 16- 0 MEAN QFF PRESSURE IN HPA 1017.7 1012.7 1012.0 1006.5 1007.0 1000.4 996.6 1001.5 1008.0 1010.1 1017.1 1017.4 1008.9 MAX. QFF PRESSURE IN HPA 1030.8 1023.1 1027.3 1018.9 1015.6 1011.1 1003.3 1010.6 1015.3 1018.5 1026.9 1029.0 1030.8 DAY-HOUR 26- 6 19- 3 5- 6 18- 3 20- 6 11- 6 22- 3 30- 3 24- 3 10- 6 13- 6 22- 6 MIN. QFF PRESSURE IN HPA 1003.5 1000.7 995.5 998.3 995.3 992.0 988.0 993.1 1000.6 1000.9 1002.7 1002.3 988.0 DAY-HOUR 7-12 11-12 27-12 12-12 16-15 21-12 6-15 14-15 5-15 4-12 29-12 1-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 887.6 884.2 884.5 883.8 885.0 882.1 880.3 ****** ****** 887.5 888.2 886.9 ****** MAX. QFE PRESSURE IN HPA 897.1 890.2 892.7 890.8 891.8 888.6 884.3 ****** ****** 893.8 894.5 893.7 ****** DAY 18 13 5 28 20 11 11 ** ** 10 25 23 MIN. QFE PRESSURE IN HPA 879.1 876.6 874.3 878.8 877.0 876.3 873.7 ****** ****** 882.4 878.6 875.9 ****** DAY 7 12 28 12 17 23 7 ** ** 5 30 16 MEAN QNH PRESSURE IN HPA 1016.4 1012.5 1012.9 1012.1 1013.4 1010.2 1008.2 ****** ****** 1016.3 1017.0 1015.6 ****** MAX. QNH PRESSURE IN HPA 1026.9 1019.2 1022.0 1019.9 1021.0 1017.5 1012.7 ****** ****** 1023.3 1024.0 1023.2 ****** DAY 18 13 5 28 20 11 11 ** ** 10 25 23 MIN. QNH PRESSURE IN HPA 1006.9 1004.1 1001.5 1006.5 1004.5 1003.7 1000.8 ****** ****** 1010.5 1006.3 1003.3 ****** DAY 7 12 28 12 17 23 7 ** ** 5 30 16 MEAN QFF PRESSURE IN HPA 1017.3 1012.2 1011.6 1006.1 1007.0 1000.5 996.4 ****** ****** 1009.6 1014.6 1016.5 ****** MAX. QFF PRESSURE IN HPA 1028.8 1022.1 1025.9 1017.4 1014.7 1008.7 1001.3 ****** ****** 1016.9 1023.1 1025.6 ****** DAY 27 19 5 18 20 11 22 ** ** 10 25 23 MIN. QFF PRESSURE IN HPA 1005.9 1001.2 998.1 998.9 997.3 992.9 989.2 ****** ****** 1002.5 1006.0 1002.5 ****** DAY 7 11 27 23 17 21 7 ** ** 5 30 16 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 887.9 884.8 885.0 884.4 885.6 882.9 881.3 883.3 887.4 888.1 891.2 887.3 885.8 MAX. QFE PRESSURE IN HPA 898.0 892.0 893.4 891.0 892.3 889.6 885.4 889.1 891.9 893.9 897.2 895.0 898.0 DAY 18 13 5 18 20 11 22 29 24 10 13 22 MIN. QFE PRESSURE IN HPA 878.5 876.9 875.9 879.3 877.6 876.7 875.0 878.0 883.7 883.4 879.0 878.1 875.0 DAY 7 11 28 12 17 23 7 14 6 4 29 1 MEAN QNH PRESSURE IN HPA 1016.7 1013.3 1013.5 1012.8 1014.1 1011.1 1009.3 1011.6 1016.1 1016.9 1020.4 1016.0 1014.3 MAX. QNH PRESSURE IN HPA 1027.9 1021.3 1022.8 1020.1 1021.6 1018.6 1013.9 1018.0 1021.1 1023.4 1027.1 1024.6 1027.9 DAY 18 13 5 18 20 11 22 29 24 10 13 22 MIN. QNH PRESSURE IN HPA 1006.2 1004.4 1003.3 1007.1 1005.2 1004.2 1002.3 1005.6 1012.0 1011.7 1006.7 1005.7 1002.3 DAY 7 11 28 12 17 23 7 14 6 4 29 1 MEAN QFF PRESSURE IN HPA 1018.4 1013.6 1012.9 1007.6 1008.1 1001.9 998.0 1002.2 1008.2 1011.6 1019.4 1018.0 1010.0 MAX. QFF PRESSURE IN HPA 1030.0 1023.1 1027.1 1018.9 1015.3 1010.9 1003.3 1010.6 1015.3 1018.4 1026.8 1028.3 1030.0 DAY 27 19 5 18 11 11 22 30 24 10 19 22 MIN. QFF PRESSURE IN HPA 1006.2 1002.2 998.6 1000.9 997.6 994.7 991.4 995.4 1002.1 1004.7 1005.4 1005.2 991.4 DAY 7 11 27 12 17 21 7 14 14 4 29 1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 888.8 885.5 886.0 885.3 886.2 883.3 881.7 884.0 888.4 889.1 892.3 888.4 886.6 MAX. QFE PRESSURE IN HPA 898.6 893.1 894.5 891.9 893.0 890.1 885.8 889.8 892.5 895.1 898.7 896.1 898.7 DAY 18 13 5 27 20 11 22 29 24 10 13 4 MIN. QFE PRESSURE IN HPA 878.7 876.9 875.3 880.3 877.7 877.5 874.9 878.6 884.3 884.4 879.9 878.5 874.9 DAY 7 11 27 12 17 24 6 14 6 4 29 16 MEAN QNH PRESSURE IN HPA 1017.7 1014.1 1014.5 1013.8 1014.8 1011.5 1009.8 1012.3 1017.2 1018.1 1021.5 1017.2 1015.2 MAX. QNH PRESSURE IN HPA 1028.6 1022.5 1024.0 1021.1 1022.4 1019.1 1014.3 1018.8 1021.8 1024.7 1028.7 1025.8 1028.7 DAY 18 13 5 27 20 11 22 29 24 10 13 4 MIN. QNH PRESSURE IN HPA 1006.4 1004.4 1002.6 1008.2 1005.3 1005.1 1002.2 1006.3 1012.7 1012.8 1007.7 1006.2 1002.2 DAY 7 11 27 12 17 24 6 14 6 4 29 16 MEAN QFF PRESSURE IN HPA 1019.1 1014.3 1013.5 1008.1 1008.3 1002.0 998.3 1002.6 1008.5 1011.6 1019.5 1018.5 1010.4 MAX. QFF PRESSURE IN HPA 1030.8 1022.9 1027.3 1018.5 1015.6 1011.1 1003.2 1010.4 1015.2 1018.5 1026.9 1029.0 1030.8 DAY 26 19 5 18 20 11 22 29 24 10 13 22 MIN. QFF PRESSURE IN HPA 1006.5 1003.5 998.0 1001.2 997.8 994.7 991.1 995.7 1003.4 1005.0 1007.6 1005.6 991.1 DAY 7 11 27 12 17 24 6 14 6 4 29 1 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 888.3 885.1 885.4 884.4 885.7 882.6 881.1 883.1 887.7 888.1 891.5 887.8 885.9 MAX. QFE PRESSURE IN HPA 897.9 893.3 893.7 891.9 892.1 888.6 884.7 889.3 891.4 894.6 898.0 895.4 898.0 DAY 18 13 5 27 20 11 21 29 23 9 13 4 MIN. QFE PRESSURE IN HPA 878.2 876.3 872.8 879.2 876.8 876.5 874.5 877.4 883.9 882.7 878.1 877.6 872.8 DAY 7 11 27 12 17 23 6 14 5 4 29 1 MEAN QNH PRESSURE IN HPA 1017.1 1013.5 1013.9 1012.8 1014.2 1010.7 1009.1 1011.4 1016.4 1016.9 1020.7 1016.5 1014.4 MAX. QNH PRESSURE IN HPA 1027.8 1022.7 1023.2 1021.1 1021.4 1017.5 1013.1 1018.2 1020.6 1024.2 1027.9 1025.0 1027.9 DAY 18 13 5 27 20 11 21 29 23 9 13 4 MIN. QNH PRESSURE IN HPA 1005.8 1003.7 999.8 1007.0 1004.3 1003.9 1001.7 1005.0 1012.2 1010.9 1005.7 1005.2 999.8 DAY 7 11 27 12 17 23 6 14 5 4 29 1 MEAN QFF PRESSURE IN HPA 1017.8 1013.2 1012.4 1006.6 1007.5 1000.9 997.2 ****** ****** 1009.9 1014.6 1017.1 ****** MAX. QFF PRESSURE IN HPA 1029.4 1021.7 1026.4 1017.5 1014.6 1008.8 1001.6 ****** ****** 1017.3 1023.9 1026.7 ****** DAY 26 13 5 27 19 11 22 ** ** 9 25 22 MIN. QFF PRESSURE IN HPA 1005.6 1002.7 996.0 1000.0 997.4 994.2 989.9 ****** ****** 1002.2 1005.1 1003.0 ****** DAY 7 11 27 12 17 24 6 ** ** 4 29 1 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 887.0 883.3 883.7 882.9 884.1 880.7 879.3 881.6 885.9 886.6 890.2 886.8 884.3 MAX. QFE PRESSURE IN HPA 896.9 890.4 891.3 889.5 890.4 886.1 882.9 888.7 890.0 893.3 896.6 894.7 896.9 DAY 18 13 5 27 27 11 21 29 23 9 13 22 MIN. QFE PRESSURE IN HPA 876.8 874.7 871.5 877.2 876.5 875.3 872.9 876.2 881.9 881.3 876.1 876.1 871.5 DAY 7 11 27 12 17 23 6 14 5 4 29 1 MEAN QNH PRESSURE IN HPA 1015.6 1011.5 1011.9 1011.1 1012.4 1008.6 1007.1 1009.7 1014.4 1015.3 1019.3 1015.4 1012.7 MAX. QNH PRESSURE IN HPA 1026.7 1019.5 1020.5 1018.5 1019.5 1014.7 1011.1 1017.6 1019.0 1022.7 1026.4 1024.3 1026.7 DAY 18 13 5 27 27 11 21 29 23 9 13 22 MIN. QNH PRESSURE IN HPA 1004.3 1001.9 998.4 1004.7 1003.9 1002.6 999.9 1003.6 1010.0 1009.3 1003.5 1003.5 998.4 DAY 7 11 27 12 17 23 6 14 5 4 29 1 MEAN QFF PRESSURE IN HPA 1016.4 1011.0 1010.6 1005.0 1005.8 998.8 995.4 ****** ****** 1008.6 1013.5 1016.4 ****** MAX. QFF PRESSURE IN HPA 1028.8 1018.4 1023.7 1014.7 1012.7 1005.9 999.6 ****** ****** 1016.0 1023.0 1026.9 ****** DAY 26 19 5 27 25 11 22 ** ** 9 25 22 MIN. QFF PRESSURE IN HPA 1003.5 1000.7 995.5 998.3 996.6 992.0 988.3 ****** ****** 1000.9 1002.7 1002.3 ****** DAY 7 11 27 12 16 21 6 ** ** 4 29 1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 887.3 883.7 883.7 883.0 883.9 880.3 878.8 881.2 885.8 886.8 890.3 887.3 884.3 MAX. QFE PRESSURE IN HPA 897.8 891.0 891.5 890.1 890.0 886.8 882.3 888.4 890.0 893.6 896.8 894.8 897.8 DAY 18 13 5 27 27 5 21 29 23 9 13 22 MIN. QFE PRESSURE IN HPA 877.5 875.7 872.9 877.7 875.8 875.0 872.2 876.0 881.2 880.7 877.6 878.4 872.2 DAY 7 11 27 12 16 23 6 14 5 4 29 1 MEAN QNH PRESSURE IN HPA 1016.0 1012.0 1012.0 1011.3 1012.2 1008.2 1006.5 1009.2 1014.4 1015.5 1019.4 1016.0 1012.7 MAX. QNH PRESSURE IN HPA 1027.7 1020.1 1020.7 1019.1 1019.0 1015.4 1010.4 1017.2 1019.0 1023.0 1026.6 1024.4 1027.7 DAY 18 13 5 27 27 5 21 29 23 9 13 22 MIN. QNH PRESSURE IN HPA 1005.1 1003.1 999.9 1005.3 1003.2 1002.3 999.1 1003.4 1009.2 1008.6 1005.2 1006.1 999.1 DAY 7 11 27 12 16 23 6 14 5 4 29 1 MEAN QFF PRESSURE IN HPA 1017.6 1012.3 1011.3 1006.0 1006.0 998.9 995.2 999.8 1006.3 1010.1 1018.4 1017.9 1008.3 MAX. QFF PRESSURE IN HPA 1029.0 1019.9 1024.5 1016.7 1012.8 1007.6 999.3 1009.3 1012.9 1017.8 1026.0 1028.2 1029.0 DAY 26 19 5 27 11 5 21 29 23 9 13 22 MIN. QFF PRESSURE IN HPA 1004.8 1002.2 996.8 999.4 995.3 993.0 988.0 993.1 1000.6 1001.2 1004.9 1006.0 988.0 DAY 6 11 27 11 16 20 6 14 5 4 29 1 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 888.0 884.4 884.7 884.1 884.9 881.7 880.1 882.7 886.9 887.7 890.8 887.7 885.3 MAX. QFE PRESSURE IN HPA 898.0 891.5 892.3 890.8 891.4 888.1 883.6 889.3 891.7 894.3 897.2 894.9 898.0 DAY 18 13 4 27 19 5 21 29 23 9 13 22 MIN. QFE PRESSURE IN HPA 879.1 875.7 873.1 879.0 876.6 876.3 872.6 877.0 882.5 882.4 878.2 879.4 872.6 DAY 6 11 27 12 16 22 6 14 5 4 29 1 MEAN QNH PRESSURE IN HPA 1016.8 1012.8 1013.1 1012.4 1013.4 1009.7 1007.9 1010.8 1015.6 1016.5 1019.9 1016.5 1013.8 MAX. QNH PRESSURE IN HPA 1027.9 1020.7 1021.6 1019.9 1020.6 1016.9 1011.9 1018.2 1020.9 1023.8 1027.1 1024.5 1027.9 DAY 18 13 4 27 19 5 21 29 23 9 13 22 MIN. QNH PRESSURE IN HPA 1006.9 1003.1 1000.2 1006.7 1004.1 1003.7 999.6 1004.5 1010.6 1010.5 1005.8 1007.2 999.6 DAY 6 11 27 12 16 22 6 14 5 4 29 1 MEAN QFF PRESSURE IN HPA 1018.2 1012.9 1012.0 1006.8 1006.8 1000.1 996.5 1001.3 1007.0 1010.1 1018.0 1017.8 1009.0 MAX. QFF PRESSURE IN HPA 1029.9 1020.4 1025.1 1017.4 1014.5 1007.8 1000.4 1010.3 1014.1 1017.8 1025.5 1028.2 1029.9 DAY 26 19 4 27 19 5 3 29 23 9 13 22 MIN. QFF PRESSURE IN HPA 1005.8 1003.1 998.0 1000.1 996.2 994.1 988.6 994.1 1001.9 1002.8 1005.4 1006.7 988.6 DAY 6 11 27 12 16 23 6 14 5 4 30 1 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 887.7 884.4 884.7 884.0 885.2 881.8 880.2 ****** ****** 887.8 887.9 887.5 ****** MAX. QFE PRESSURE IN HPA 897.7 890.4 892.3 890.8 891.8 888.4 884.6 ****** ****** 894.3 895.1 894.1 ****** DAY 18 13 4 27 19 10 21 ** ** 9 25 22 MIN. QFE PRESSURE IN HPA 879.1 875.7 873.5 879.2 876.2 876.3 872.9 ****** ****** 882.8 878.5 878.0 ****** DAY 6 11 27 16 16 22 6 ** ** 4 30 15 MEAN QNH PRESSURE IN HPA 1016.5 1012.7 1013.1 1012.4 1013.6 1009.8 1008.1 ****** ****** 1016.5 1016.7 1016.2 ****** MAX. QNH PRESSURE IN HPA 1027.6 1019.5 1021.6 1019.9 1021.0 1017.2 1013.0 ****** ****** 1023.8 1024.7 1023.6 ****** DAY 18 13 4 27 19 10 21 ** ** 9 25 22 MIN. QNH PRESSURE IN HPA 1006.9 1003.1 1000.6 1007.0 1003.6 1003.7 999.9 ****** ****** 1011.0 1006.2 1005.6 ****** DAY 6 11 27 16 16 22 6 ** ** 4 30 15 MEAN QFF PRESSURE IN HPA 1017.2 1012.4 1011.5 1006.2 1006.8 1000.0 996.2 ****** ****** 1009.6 1014.0 1016.9 ****** MAX. QFF PRESSURE IN HPA 1029.1 1020.8 1024.6 1016.5 1014.6 1008.2 1001.4 ****** ****** 1017.4 1022.8 1025.9 ****** DAY 26 18 4 27 10 10 21 ** ** 9 25 22 MIN. QFF PRESSURE IN HPA 1005.6 1003.5 999.1 999.5 996.0 993.0 988.5 ****** ****** 1002.6 1004.0 1004.2 ****** DAY 6 11 27 10 16 20 6 ** ** 4 30 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.3 4.0 11.1 20.0 24.3 29.1 31.6 30.6 25.8 18.2 12.4 7.1 18.1 MINIMUN AIR TEMPERATURE (C) -2.1 0.1 5.3 13.1 17.7 22.3 24.4 23.6 18.7 11.9 6.5 1.8 11.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 9 22 31 29 10 0 0 0 101 DAYS WITH MINIMUM TEMP. <=-4 4 4 0 0 0 0 0 0 0 0 0 0 8 DAYS WITH FREEZING MIN.<= 0 27 12 2 0 0 0 0 0 0 0 1 10 52 TEMPERATURE RECORDS LOWEST(C) -10.0 -7.0 -2.0 5.0 12.0 18.0 21.0 19.0 12.0 4.0 0.0 -2.0 -10.0 DAY 25 3 5 18 18 1 15 31 23 22 25 13 MAXIMUM AIR TEMPERATURE (C) 8.1 9.4 18.2 27.2 32.0 36.7 39.4 38.5 34.3 25.8 20.1 14.7 25.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 9 22 30 31 31 29 8 0 0 160 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 15.0 14.0 27.0 32.0 37.0 40.0 42.0 42.0 39.0 34.0 24.0 20.0 42.0 DAY 6 17 31 22 23 5 30 5 2 6 13 1 DIF. BETWEEN (MAX.-MIN.) (C) 10.2 9.3 12.9 14.1 14.3 14.4 15.0 14.9 15.6 13.9 13.6 12.9 13.5 MEAN DAILY TEMP. (MDT) (C) 3.0 4.8 11.7 20.2 24.9 29.5 31.9 31.1 26.5 18.9 13.3 8.2 18.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 16.5 122.5 254.5 336.5 312.0 166.0 31.5 0.0 0.0 1239.5 HEATING DEG. DAYS(BASE 18 0C) 465.0 384.0 195.0 12.5 0.0 0.0 0.0 0.0 0.0 37.5 141.0 303.0 1538.0 DEWPOINT (MEAN C) -3.2 -0.1 0.7 0.4 4.5 8.3 8.5 11.9 6.1 6.1 3.4 -1.3 3.8 MIXING RATIO (G/KG) 3.49 4.40 4.73 4.90 6.18 7.94 8.13 10.11 6.91 6.73 5.62 4.02 6.10 VAPOUR PRESSURE (HPA) 4.94 6.21 6.67 6.89 8.68 11.09 11.36 14.08 9.71 9.49 7.95 5.69 8.56 SATURATION DEF. (HPA) 2.52 2.14 7.37 17.46 23.14 30.82 36.70 31.54 25.30 12.88 7.11 4.86 16.82 RELATIVE HUMIDITY (MEAN %) 70 76 52 30 30 28 25 33 30 48 55 58 45 RELATIVE HUMIDITY (MAX. %) 85 90 73 48 44 38 35 45 41 61 71 71 59 RELATIVE HUMIDITY (MIN. %) 50 58 33 17 19 20 17 23 21 35 41 41 31 RELATIVE HUMIDITY (MEAN% 03UTC) 80 86 69 42 39 36 32 42 38 58 66 67 55 RELATIVE HUMIDITY (MEAN% 09UTC) 53 64 39 20 21 23 19 25 23 37 43 43 34 RELATIVE HUMIDITY (MEAN% 15UTC) 68 73 42 21 24 24 21 29 27 44 52 59 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 24.4 66.2 20.2 1.2 3.0 0.0 0.0 5.0 3.0 2.2 0.8 27.4 153.4 DAYS WITH PRECIPITATION >=10 1 3 0 0 0 0 0 0 0 0 0 2 6 DAYS WITH PRECIPITATION >= 5 2 5 1 0 0 0 0 1 0 0 0 2 11 DAYS WITH PRECIPITATION >= 1 4 8 5 1 2 0 0 1 1 2 0 2 26 DAYS WITH PRECIPITATION 6 8 12 2 3 0 0 1 1 4 1 4 42 GREATEST DAILY PRECIPITATION 11.0 17.0 7.0 1.0 2.0 0.0 0.0 5.0 3.0 1.1 0.8 16.0 17.0 DAY 23 11 19 30 10 ** ** 12 23 21 10 18 DAY WITH THUNDER STORM 0 0 0 0 2 0 0 3 2 0 0 0 7 DAYS WITH SNOW OR SLEET 5 4 0 0 0 0 0 0 0 0 0 0 9 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 1 0 0 1 WIND DIRECTION (PREVAILING) 315 315 225 225 360 360 360 360 360 315 315 360 360 PREVAILING WIND SPEED(KNOTS) 6.5 6.3 9.5 11.6 11.5 12.8 10.3 11.8 10.4 7.3 6.1 7.1 10.8 PREVAILING WIND PERCENT 4.8 2.6 6.0 13.3 17.3 12.5 14.9 15.3 12.5 9.3 5.0 5.6 8.1 CALMS PERCENT OF WIND 91.5 92.7 79.0 63.8 64.1 62.5 62.9 67.7 67.1 75.4 88.8 88.3 75.3 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 329 336 280 254 340 10 10 359 345 311 310 339 337 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.2 0.9 2.3 1.7 2.3 2.4 2.1 2.1 1.1 0.4 0.7 1.1 WIND STEADINESES (MEAN %) 75.0 40.0 52.9 63.9 47.2 59.0 72.7 67.7 72.4 47.8 57.1 87.5 47.8 WIND SPEED (MEAN KNOTS) 0.8 0.5 1.7 3.6 3.6 3.9 3.3 3.1 2.9 2.3 0.7 0.8 2.3 FASTEST WIND DIRECTION 350 340 330 300 360 360 360 340 360 360 330 330 360 FASTEST WIND SPEED (KNOTS) 20 12 20 20 30 25 20 24 25 25 12 15 30 DAY 31 11 18 23 10 10 12 12 22 9 23 11 DAYS WITH SKY CLEAR (0-2)/8 14 6 12 15 18 28 31 29 30 23 16 18 240 DAYS WITH P.CLOUDY (3-6)/8 9 12 15 10 11 2 0 2 0 7 13 9 90 DAYS WITH CLOUDY (7-8)/8 8 11 4 5 2 0 0 0 0 1 1 4 36 DAYS WITH VISIBILITY =< 2 KM 1 2 0 0 1 0 0 0 0 0 0 0 4 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 886.4 886.1 883.8 882.4 882.7 880.3 880.7 880.8 884.4 886.6 888.5 887.4 884.2 MAX. QFE PRESSURE IN HPA 893.2 894.3 892.6 891.3 887.8 889.0 886.6 888.7 891.4 891.9 896.3 894.4 896.3 DAY-HOUR 9-21 1- 6 28- 6 20- 6 16- 6 2- 6 11- 6 31- 6 26- 6 22- 6 3- 6 20- 6 MIN. QFE PRESSURE IN HPA 877.7 876.4 870.4 873.8 877.2 871.6 876.2 876.3 877.8 880.5 881.5 874.8 870.4 DAY-HOUR 6-18 12- 0 2-15 16- 0 10-12 16-21 2-15 19-15 21-12 4-12 15-12 11-21 MEAN QNH PRESSURE IN HPA 1015.0 1014.6 1012.1 1010.6 1010.9 1008.2 1008.7 1008.7 1012.7 1015.3 1017.3 1016.1 1012.5 MAX. QNH PRESSURE IN HPA 1022.6 1023.8 1021.9 1020.5 1016.6 1017.9 1015.2 1017.6 1020.6 1021.1 1026.0 1023.9 1026.0 DAY-HOUR 9-21 1- 6 28- 6 20- 6 16- 6 2- 6 11- 6 31- 6 26- 6 22- 6 3- 6 20- 6 MIN. QNH PRESSURE IN HPA 1005.3 1003.8 997.1 1000.9 1004.7 998.5 1003.6 1003.7 1005.4 1008.4 1009.5 1002.1 997.1 DAY-HOUR 6-18 12- 0 2-15 16- 0 10-12 16-21 2-15 19-15 21-12 4-12 15-12 11-21 MEAN QFF PRESSURE IN HPA 1017.5 1016.3 1010.3 1004.6 1003.0 998.1 997.5 997.8 1004.1 1010.0 1014.8 1016.3 1007.5 MAX. QFF PRESSURE IN HPA 1026.3 1028.9 1019.1 1016.2 1009.8 1009.9 1004.2 1008.4 1013.5 1019.2 1024.9 1026.4 1028.9 DAY-HOUR 31-21 1- 6 28- 6 20- 6 17- 3 2- 6 18- 6 31- 3 26- 3 22- 6 26- 3 20- 6 MIN. QFF PRESSURE IN HPA 1003.8 1004.7 993.8 993.3 996.2 986.3 992.3 991.4 997.2 999.8 1005.0 999.7 986.3 DAY-HOUR 6-21 18-12 19- 0 16- 0 23-12 16-21 31-21 1-12 21-12 4-12 15-12 11-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 885.8 885.6 883.5 882.3 882.7 880.3 880.8 880.5 884.3 886.5 888.2 887.2 884.0 MAX. QFE PRESSURE IN HPA 892.2 892.8 889.9 890.3 886.3 887.9 885.3 887.8 890.2 890.7 894.6 893.2 894.6 DAY 10 1 28 21 26 2 12 31 26 23 3 21 MIN. QFE PRESSURE IN HPA 878.4 876.4 871.4 873.8 879.1 871.9 877.2 877.2 879.2 881.1 882.0 875.2 871.4 DAY 7 12 19 16 10 17 3 7 20 5 25 12 MEAN QNH PRESSURE IN HPA 1014.4 1014.1 1011.8 1010.5 1010.9 1008.2 1008.8 1008.5 1012.6 1015.1 1017.0 1015.9 1012.3 MAX. QNH PRESSURE IN HPA 1021.5 1022.1 1018.9 1019.4 1014.9 1016.7 1013.8 1016.6 1019.2 1019.8 1024.2 1022.6 1024.2 DAY 10 1 28 21 26 2 12 31 26 23 3 21 MIN. QNH PRESSURE IN HPA 1006.1 1003.8 998.3 1000.9 1006.9 998.8 1004.7 1004.7 1007.0 1009.1 1010.1 1002.5 998.3 DAY 7 12 19 16 10 17 3 7 20 5 25 12 MEAN QFF PRESSURE IN HPA 1016.7 1015.6 1009.6 1004.4 1002.9 998.0 997.5 997.3 1003.7 1009.5 1014.3 1015.6 1007.1 MAX. QFF PRESSURE IN HPA 1024.2 1026.8 1016.2 1014.0 1009.1 1008.7 1002.6 1007.0 1011.6 1018.0 1021.7 1023.7 1026.8 DAY 10 1 5 21 17 2 12 31 26 22 26 21 MIN. QFF PRESSURE IN HPA 1004.7 1004.9 993.8 993.3 997.8 987.1 993.7 992.4 998.1 1000.2 1006.7 1000.2 987.1 DAY 7 12 19 16 24 17 3 7 20 5 16 12 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 886.1 886.1 884.0 883.0 883.4 881.2 881.6 881.3 884.9 887.0 888.7 887.5 884.6 MAX. QFE PRESSURE IN HPA 892.0 893.0 890.8 890.3 887.1 888.6 885.7 888.0 890.6 890.9 895.6 893.7 895.6 DAY 10 1 28 21 26 2 18 31 26 23 3 21 MIN. QFE PRESSURE IN HPA 879.4 876.9 870.9 873.8 879.4 873.0 877.9 878.0 880.0 881.6 882.2 877.0 870.9 DAY 7 12 19 16 10 17 3 7 21 5 25 12 MEAN QNH PRESSURE IN HPA 1014.7 1014.7 1012.3 1011.2 1011.7 1009.2 1009.6 1009.4 1013.3 1015.6 1017.5 1016.3 1013.0 MAX. QNH PRESSURE IN HPA 1021.3 1022.4 1019.9 1019.4 1015.8 1017.5 1014.2 1016.8 1019.7 1020.0 1025.3 1023.2 1025.3 DAY 10 1 28 21 26 2 18 31 26 23 3 21 MIN. QNH PRESSURE IN HPA 1007.2 1004.4 997.7 1000.9 1007.2 1000.0 1005.5 1005.6 1007.9 1009.6 1010.3 1004.5 997.7 DAY 7 12 19 16 10 17 3 7 21 5 25 12 MEAN QFF PRESSURE IN HPA 1018.0 1016.9 1011.3 1005.9 1004.3 999.5 998.9 998.9 1005.5 1011.2 1016.0 1017.4 1008.7 MAX. QFF PRESSURE IN HPA 1025.0 1027.7 1018.0 1015.6 1009.8 1009.4 1003.9 1008.4 1013.5 1019.1 1024.9 1025.8 1027.7 DAY 10 1 28 20 17 2 18 31 26 22 26 21 MIN. QFF PRESSURE IN HPA 1007.6 1006.0 994.3 994.2 998.9 989.0 994.8 994.0 1000.2 1001.5 1008.4 1004.5 989.0 DAY 7 12 19 16 24 17 3 7 19 5 10 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 887.5 887.1 885.2 883.9 884.0 881.7 882.0 882.1 885.9 888.0 889.7 888.8 885.5 MAX. QFE PRESSURE IN HPA 892.9 894.3 892.6 891.3 887.8 889.0 886.6 888.7 891.4 891.9 896.3 894.4 896.3 DAY 10 1 28 20 16 2 11 31 26 22 3 20 MIN. QFE PRESSURE IN HPA 881.1 876.6 872.6 875.5 879.4 874.3 878.3 878.9 880.3 883.4 883.3 878.7 872.6 DAY 24 25 19 16 10 17 3 7 21 5 25 12 MEAN QNH PRESSURE IN HPA 1016.2 1015.8 1013.6 1012.2 1012.4 1009.8 1010.1 1010.3 1014.4 1016.8 1018.7 1017.6 1014.0 MAX. QNH PRESSURE IN HPA 1022.3 1023.8 1021.9 1020.5 1016.6 1017.9 1015.2 1017.6 1020.6 1021.1 1026.0 1023.9 1026.0 DAY 10 1 28 20 16 2 11 31 26 22 3 20 MIN. QNH PRESSURE IN HPA 1009.1 1004.1 999.6 1002.8 1007.2 1001.5 1006.0 1006.6 1008.2 1011.7 1011.5 1006.4 999.6 DAY 24 25 19 16 10 17 3 7 21 5 25 12 MEAN QFF PRESSURE IN HPA 1019.0 1017.6 1012.0 1006.3 1004.4 999.8 999.0 999.5 1005.8 1011.5 1016.2 1018.1 1009.1 MAX. QFF PRESSURE IN HPA 1025.3 1028.9 1019.1 1016.2 1009.4 1009.9 1004.2 1008.4 1013.2 1019.2 1023.7 1026.4 1028.9 DAY 10 1 28 20 16 2 18 31 23 22 26 20 MIN. QFF PRESSURE IN HPA 1010.4 1005.6 996.9 996.5 998.8 990.4 995.3 994.9 999.9 1002.4 1009.2 1005.4 990.4 DAY 7 25 19 16 24 17 3 7 21 5 10 12 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 886.9 886.8 884.7 883.0 883.3 881.1 881.3 881.5 885.1 887.0 888.7 887.7 884.8 MAX. QFE PRESSURE IN HPA 892.4 893.9 891.0 890.6 887.1 888.0 886.2 888.2 890.3 891.5 895.0 893.1 895.0 DAY 9 1 28 20 16 2 11 30 26 23 5 20 MIN. QFE PRESSURE IN HPA 880.9 877.0 871.9 876.0 878.3 873.9 877.9 878.1 879.4 882.3 882.8 877.5 871.9 DAY 24 25 19 16 10 17 3 11 21 5 15 12 MEAN QNH PRESSURE IN HPA 1015.6 1015.5 1013.1 1011.2 1011.5 1009.1 1009.3 1009.5 1013.5 1015.7 1017.5 1016.4 1013.2 MAX. QNH PRESSURE IN HPA 1021.7 1023.4 1020.1 1019.7 1015.8 1016.8 1014.8 1017.0 1019.4 1020.7 1024.6 1022.5 1024.6 DAY 9 1 28 20 16 2 11 30 26 23 5 20 MIN. QNH PRESSURE IN HPA 1008.9 1004.5 998.8 1003.4 1006.0 1001.0 1005.5 1005.7 1007.2 1010.4 1011.0 1005.1 998.8 DAY 24 25 19 16 10 17 3 11 21 5 15 12 MEAN QFF PRESSURE IN HPA 1017.5 1016.8 1010.8 1004.8 1003.2 998.7 997.9 998.2 1004.4 1009.8 1014.3 1015.7 1007.7 MAX. QFF PRESSURE IN HPA 1024.0 1027.3 1016.8 1014.9 1008.6 1008.4 1003.7 1006.9 1011.7 1017.1 1021.7 1023.0 1027.3 DAY 9 1 8 20 17 2 18 30 23 22 26 20 MIN. QFF PRESSURE IN HPA 1008.4 1006.3 995.6 996.9 997.5 989.4 994.5 994.3 998.8 1000.6 1006.4 1002.8 989.4 DAY 6 25 19 16 10 17 31 7 21 5 15 12 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 885.7 885.4 883.0 881.4 881.6 879.4 879.6 879.8 883.3 885.5 887.5 886.5 883.2 MAX. QFE PRESSURE IN HPA 891.5 892.0 889.0 889.0 885.8 886.3 884.6 886.8 888.5 890.1 894.0 892.4 894.0 DAY 9 1 28 20 16 1 11 30 26 23 3 20 MIN. QFE PRESSURE IN HPA 879.2 876.7 870.9 874.7 877.2 873.2 876.6 876.7 877.8 880.5 881.5 876.5 870.9 DAY 6 18 2 16 10 17 3 7 21 4 15 11 MEAN QNH PRESSURE IN HPA 1014.2 1013.8 1011.2 1009.4 1009.6 1007.2 1007.4 1007.7 1011.6 1014.0 1016.3 1015.1 1011.5 MAX. QNH PRESSURE IN HPA 1020.7 1021.3 1017.9 1017.9 1014.3 1014.9 1013.0 1015.4 1017.3 1019.1 1023.5 1021.7 1023.5 DAY 9 1 28 20 16 1 11 30 26 23 3 20 MIN. QNH PRESSURE IN HPA 1007.0 1004.2 997.7 1001.9 1004.7 1000.3 1004.1 1004.2 1005.4 1008.4 1009.5 1003.9 997.7 DAY 6 18 2 16 10 17 3 7 21 4 15 11 MEAN QFF PRESSURE IN HPA 1016.5 1015.1 1009.0 1003.2 1001.6 996.8 996.1 996.4 1002.5 1008.3 1013.5 1014.7 1006.1 MAX. QFF PRESSURE IN HPA 1023.3 1025.3 1014.9 1013.5 1008.4 1006.5 1001.6 1005.4 1009.6 1015.1 1021.1 1022.8 1025.3 DAY 9 1 28 20 16 1 18 30 26 22 26 20 MIN. QFF PRESSURE IN HPA 1006.3 1004.7 995.3 995.8 996.2 988.9 992.6 991.4 997.2 999.8 1005.0 1002.7 988.9 DAY 6 18 19 16 23 16 3 1 21 4 15 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1980 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 886.1 885.6 883.0 881.2 881.5 879.0 879.4 879.5 883.2 885.7 888.0 887.0 883.3 MAX. QFE PRESSURE IN HPA 892.5 892.0 888.9 889.0 885.1 885.8 884.3 886.8 888.4 890.0 893.8 893.1 893.8 DAY 9 1 28 20 16 1 11 30 26 30 3 20 MIN. QFE PRESSURE IN HPA 878.0 876.4 870.4 873.9 878.6 872.6 876.2 876.3 878.6 881.1 882.1 876.9 870.4 DAY 6 18 2 16 23 16 2 19 21 4 15 11 MEAN QNH PRESSURE IN HPA 1014.7 1014.1 1011.2 1009.2 1009.5 1006.7 1007.2 1007.3 1011.4 1014.2 1016.8 1015.6 1011.5 MAX. QNH PRESSURE IN HPA 1021.8 1021.3 1017.8 1017.9 1013.6 1014.3 1012.7 1015.4 1017.2 1019.0 1023.3 1022.5 1023.3 DAY 9 1 28 20 16 1 11 30 26 30 3 20 MIN. QNH PRESSURE IN HPA 1005.6 1003.8 997.1 1001.0 1006.3 999.6 1003.6 1003.7 1006.3 1009.1 1010.2 1004.4 997.1 DAY 6 18 2 16 23 16 2 19 21 4 15 11 MEAN QFF PRESSURE IN HPA 1017.9 1016.2 1010.0 1003.8 1002.1 996.9 996.4 996.9 1003.5 1009.8 1015.2 1016.7 1007.1 MAX. QFF PRESSURE IN HPA 1025.4 1026.4 1015.9 1014.1 1008.7 1006.7 1002.6 1006.5 1010.7 1017.6 1022.9 1025.2 1026.4 DAY 9 1 4 20 16 1 18 30 26 22 26 20 MIN. QFF PRESSURE IN HPA 1006.4 1004.7 996.6 995.6 996.5 988.0 992.6 992.7 998.7 1001.1 1007.1 1004.5 988.0 DAY 6 18 19 16 23 16 31 20 13 4 15 11 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 886.7 886.1 883.7 882.3 882.6 880.0 880.6 880.7 884.2 886.7 888.7 887.6 884.2 MAX. QFE PRESSURE IN HPA 893.0 892.4 889.3 890.3 886.2 887.5 885.1 887.8 889.6 890.8 895.2 893.5 895.2 DAY 9 1 27 20 16 1 11 30 25 30 2 20 MIN. QFE PRESSURE IN HPA 877.7 877.2 871.3 875.9 878.5 872.4 877.2 876.9 879.6 881.6 882.7 875.4 871.3 DAY 6 18 2 15 9 16 2 6 19 4 15 11 MEAN QNH PRESSURE IN HPA 1015.3 1014.6 1012.0 1010.5 1010.8 1007.9 1008.5 1008.7 1012.5 1015.3 1017.6 1016.3 1012.5 MAX. QNH PRESSURE IN HPA 1022.4 1021.7 1018.2 1019.4 1014.8 1016.2 1013.6 1016.6 1018.6 1019.9 1024.8 1022.9 1024.8 DAY 9 1 27 20 16 1 11 30 25 30 2 20 MIN. QNH PRESSURE IN HPA 1005.3 1004.7 998.1 1003.3 1006.2 999.4 1004.7 1004.4 1007.4 1009.6 1010.9 1002.7 998.1 DAY 6 18 2 15 9 16 2 6 19 4 15 11 MEAN QFF PRESSURE IN HPA 1018.0 1016.4 1010.2 1004.5 1002.9 997.9 997.4 998.0 1004.0 1010.1 1015.2 1016.7 1007.6 MAX. QFF PRESSURE IN HPA 1025.4 1026.6 1016.8 1014.6 1009.0 1008.6 1001.9 1006.9 1011.1 1018.0 1021.8 1025.4 1026.6 DAY 9 1 4 20 16 1 18 30 25 21 26 20 MIN. QFF PRESSURE IN HPA 1004.7 1005.5 998.0 996.5 996.6 987.9 993.5 992.3 998.4 1000.1 1007.5 1001.4 987.9 DAY 6 18 2 26 23 16 31 6 18 4 15 11 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 886.4 885.9 883.8 882.3 882.8 880.2 880.8 880.9 884.3 886.8 888.5 887.4 884.2 MAX. QFE PRESSURE IN HPA 893.2 892.2 889.7 890.3 886.2 887.9 885.7 887.8 889.9 891.0 894.8 893.5 894.8 DAY 9 2 27 20 16 1 11 30 25 9 2 20 MIN. QFE PRESSURE IN HPA 878.0 878.0 871.0 875.0 878.7 871.6 877.0 876.7 879.4 881.8 883.0 874.8 871.0 DAY 6 18 2 15 9 16 31 6 19 4 16 11 MEAN QNH PRESSURE IN HPA 1015.0 1014.5 1012.1 1010.4 1011.0 1008.1 1008.7 1008.8 1012.7 1015.5 1017.3 1016.1 1012.5 MAX. QNH PRESSURE IN HPA 1022.6 1021.5 1018.7 1019.4 1014.8 1016.7 1014.2 1016.6 1018.9 1020.1 1024.4 1022.9 1024.4 DAY 9 2 27 20 16 1 11 30 25 9 2 20 MIN. QNH PRESSURE IN HPA 1005.6 1005.6 997.8 1002.3 1006.4 998.5 1004.5 1004.2 1007.2 1009.9 1011.2 1002.1 997.8 DAY 6 18 2 15 9 16 31 6 19 4 16 11 MEAN QFF PRESSURE IN HPA 1017.0 1015.8 1009.7 1004.0 1002.6 997.7 997.3 997.6 1003.7 1009.8 1014.2 1015.4 1007.1 MAX. QFF PRESSURE IN HPA 1026.3 1025.2 1017.0 1014.2 1008.3 1008.6 1002.8 1006.9 1011.1 1018.2 1020.9 1023.4 1026.3 DAY 31 2 4 20 16 1 11 30 25 21 26 20 MIN. QFF PRESSURE IN HPA 1003.8 1006.8 996.4 994.8 997.8 986.3 992.3 991.7 998.0 1000.0 1006.9 999.7 986.3 DAY 6 11 18 15 9 16 31 6 18 4 15 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.9 7.4 13.1 17.9 22.6 26.1 30.2 29.8 25.8 17.8 12.6 7.7 18.0 MINIMUN AIR TEMPERATURE (C) -0.1 2.4 7.4 11.6 16.2 20.1 23.9 23.3 18.8 12.1 6.8 3.0 12.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 5 10 25 30 12 0 0 0 82 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH FREEZING MIN.<= 0 19 7 2 2 0 0 0 0 0 0 0 2 32 TEMPERATURE RECORDS LOWEST(C) -3.0 -3.0 -1.0 -1.0 10.0 17.0 18.0 20.0 9.0 8.0 2.0 0.0 -3.0 DAY 2 4 4 3 2 1 30 5 24 31 24 21 MAXIMUM AIR TEMPERATURE (C) 11.7 14.7 21.0 25.1 29.5 33.4 37.7 37.5 33.2 25.0 20.1 15.0 25.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 7 17 29 31 31 27 1 0 0 143 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.0 19.0 28.0 33.0 36.0 38.0 42.0 40.0 37.0 30.0 25.0 19.0 42.0 DAY 21 18 25 22 27 30 18 18 13 5 2 19 DIF. BETWEEN (MAX.-MIN.) (C) 11.8 12.3 13.6 13.5 13.3 13.3 13.8 14.2 14.4 12.9 13.3 12.0 13.2 MEAN DAILY TEMP. (MDT) (C) 5.8 8.6 14.2 18.3 22.8 26.7 30.8 30.4 26.0 18.5 13.5 9.0 18.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 23.0 81.0 172.0 303.0 291.5 156.0 2.0 0.0 0.0 1028.5 HEATING DEG. DAYS(BASE 18 0C) 378.0 264.5 122.5 49.0 3.5 0.0 0.0 0.0 1.0 21.5 136.0 279.5 1255.5 DEWPOINT (MEAN C) -1.5 -2.7 0.7 0.6 3.4 9.3 10.6 11.3 6.2 4.8 -2.8 -1.1 3.2 MIXING RATIO (G/KG) 3.94 3.71 4.70 4.80 5.79 8.53 9.37 9.78 6.94 6.24 3.70 4.05 5.96 VAPOUR PRESSURE (HPA) 5.58 5.25 6.61 6.75 8.14 11.91 13.04 13.63 9.77 8.83 5.24 5.74 8.37 SATURATION DEF. (HPA) 3.46 5.79 9.53 15.25 20.67 23.17 31.69 29.70 25.33 12.43 10.13 5.19 16.03 RELATIVE HUMIDITY (MEAN %) 67 50 46 35 32 36 31 33 30 44 37 56 41 RELATIVE HUMIDITY (MAX. %) 81 67 66 52 48 50 42 44 41 56 48 70 55 RELATIVE HUMIDITY (MIN. %) 47 33 26 21 19 24 22 23 21 32 24 39 28 RELATIVE HUMIDITY (MEAN% 03UTC) 77 64 60 45 43 45 40 43 39 54 45 66 52 RELATIVE HUMIDITY (MEAN% 09UTC) 53 38 33 26 24 27 24 26 23 33 27 41 31 RELATIVE HUMIDITY (MEAN% 15UTC) 65 48 37 28 23 31 26 28 28 42 36 56 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 36.9 19.3 35.1 6.1 17.0 12.0 12.2 0.0 8.0 3.4 9.0 11.2 170.2 DAYS WITH PRECIPITATION >=10 2 0 1 0 1 0 0 0 0 0 0 1 5 DAYS WITH PRECIPITATION >= 5 2 2 2 0 1 0 1 0 1 0 1 1 11 DAYS WITH PRECIPITATION >= 1 5 5 4 2 2 6 2 0 1 1 2 1 31 DAYS WITH PRECIPITATION 6 5 6 5 2 12 2 0 1 2 3 2 46 GREATEST DAILY PRECIPITATION 21.0 7.2 23.0 4.0 15.0 4.0 9.2 0.0 8.0 3.0 8.0 11.0 23.0 DAY 12 21 28 12 6 23 21 ** 22 17 30 26 DAY WITH THUNDER STORM 0 1 0 0 3 6 3 0 1 0 0 0 14 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH DUST 0 0 0 3 2 2 0 0 0 0 0 2 9 WIND DIRECTION (PREVAILING) 315 315 315 360 225 360 360 360 360 360 360 315 360 PREVAILING WIND SPEED(KNOTS) 6.0 5.5 7.5 9.7 11.6 13.1 12.4 9.5 11.1 8.9 6.5 7.0 10.9 PREVAILING WIND PERCENT 8.5 7.6 10.5 11.3 11.7 20.8 21.8 9.3 11.8 7.3 5.4 4.0 9.4 CALMS PERCENT OF WIND 86.7 78.0 74.6 61.9 69.4 62.5 66.5 81.0 77.9 89.1 88.8 93.5 77.6 NO. OF WIND OBSERVATION 248 223 248 239 248 240 248 248 204 248 240 248 2882 VECTOR WIND DIRECTION (MEAN) 330 314 317 282 281 348 10 14 343 333 302 327 333 VECTOR WIND MAGNITUDE(KNOTS) 0.8 0.9 1.3 1.7 1.8 3.1 3.2 1.2 1.1 0.7 0.4 0.5 1.2 WIND STEADINESES (MEAN %) 88.9 52.9 61.9 47.2 51.4 67.4 86.5 70.6 55.0 77.8 44.4 100.0 54.5 WIND SPEED (MEAN KNOTS) 0.9 1.7 2.1 3.6 3.5 4.6 3.7 1.7 2.0 0.9 0.9 0.5 2.2 FASTEST WIND DIRECTION 340 360 280 350 350 360 360 10 360 360 240 340 280 FASTEST WIND SPEED (KNOTS) 20 18 25 25 25 25 20 15 25 15 12 10 25 DAY 31 22 3 2 29 19 6 1 22 28 4 7 DAYS WITH SKY CLEAR (0-2)/8 22 11 11 17 25 21 30 30 29 19 25 17 257 DAYS WITH P.CLOUDY (3-6)/8 5 11 17 10 4 9 1 1 1 9 3 11 82 DAYS WITH CLOUDY (7-8)/8 4 6 3 3 2 0 0 0 0 3 2 3 26 DAYS WITH VISIBILITY =< 2 KM 1 1 0 0 0 0 0 0 0 0 0 1 3 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 887.3 884.9 882.3 881.8 882.3 881.4 879.8 881.4 886.7 889.8 887.3 887.6 884.4 MAX. QFE PRESSURE IN HPA 896.8 891.4 892.6 890.2 889.1 889.6 887.7 887.2 893.4 896.3 894.6 895.2 896.8 DAY-HOUR 9- 6 7- 6 5- 6 19-18 30- 6 10- 6 24- 6 3- 6 27- 6 29- 6 16- 6 1-18 MIN. QFE PRESSURE IN HPA 877.4 876.2 872.3 869.6 872.4 873.5 872.6 875.6 880.5 882.4 879.3 881.2 869.6 DAY-HOUR 25-12 1-12 13-12 30-15 1- 0 5-12 1-15 13-15 19-12 16-15 5-12 19-12 MEAN QNH PRESSURE IN HPA 1016.0 1013.4 1010.4 1009.8 1010.4 1009.4 1007.6 1009.4 1015.3 1018.8 1016.0 1016.4 1012.7 MAX. QNH PRESSURE IN HPA 1026.6 1020.6 1021.9 1019.2 1018.0 1018.6 1016.5 1015.9 1022.8 1026.0 1024.2 1024.8 1026.6 DAY-HOUR 9- 6 7- 6 5- 6 19-18 30- 6 10- 6 24- 6 3- 6 27- 6 29- 6 16- 6 1-18 MIN. QNH PRESSURE IN HPA 1005.0 1003.6 999.3 996.2 999.4 1000.6 999.6 1002.9 1008.4 1010.5 1007.1 1009.2 996.2 DAY-HOUR 25-12 1-12 13-12 30-15 1- 0 5-12 1-15 13-15 19-12 16-15 5-12 19-12 MEAN QFF PRESSURE IN HPA 1017.3 1012.8 1007.2 1004.7 1003.3 1000.6 996.9 998.8 1007.7 1013.8 1013.5 1016.2 1007.7 MAX. QFF PRESSURE IN HPA 1028.1 1022.4 1022.9 1018.6 1012.1 1011.2 1007.7 1006.1 1017.5 1022.1 1023.4 1024.7 1028.1 DAY-HOUR 8-18 4- 6 5- 6 3- 6 30- 6 10- 6 24- 3 3- 6 24- 6 29- 6 26- 3 12- 6 MIN. QFF PRESSURE IN HPA 1003.8 1003.4 996.2 991.0 992.6 991.5 988.3 991.6 999.9 1004.6 1002.7 1007.6 988.3 DAY-HOUR 25-12 1-12 13-12 30-15 15-21 5- 6 1-15 13-12 19-15 16-12 5-12 19-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 887.2 884.6 882.2 881.7 882.0 881.6 879.7 881.2 ****** 889.7 887.0 887.7 ****** MAX. QFE PRESSURE IN HPA 896.2 890.0 891.2 889.3 888.0 888.0 885.8 885.5 ****** 895.0 893.2 894.4 ****** DAY 9 5 6 20 22 10 24 3 ** 30 16 2 MIN. QFE PRESSURE IN HPA 879.6 876.8 872.4 873.4 872.4 874.4 873.9 876.9 ****** 884.6 880.0 882.1 ****** DAY 3 3 13 30 1 5 2 13 ** 17 23 19 MEAN QNH PRESSURE IN HPA 1015.9 1013.0 1010.3 1009.7 1010.1 1009.6 1007.5 1009.2 ****** 1018.7 1015.6 1016.4 ****** MAX. QNH PRESSURE IN HPA 1025.9 1019.0 1020.4 1018.2 1016.8 1016.8 1014.3 1014.0 ****** 1024.6 1022.6 1023.9 ****** DAY 9 5 6 20 22 10 24 3 ** 30 16 2 MIN. QNH PRESSURE IN HPA 1007.4 1004.3 999.4 1000.5 999.4 1001.6 1001.0 1004.4 ****** 1013.0 1007.9 1010.2 ****** DAY 3 3 13 30 1 5 2 13 ** 17 23 19 MEAN QFF PRESSURE IN HPA 1016.7 1011.7 1006.5 1004.1 1002.9 1000.7 996.6 998.4 ****** 1013.4 1012.7 1015.8 ****** MAX. QFF PRESSURE IN HPA 1026.4 1020.9 1019.9 1013.6 1009.0 1010.2 1004.8 1003.8 ****** 1020.7 1021.5 1023.1 ****** DAY 9 24 6 20 30 10 24 3 ** 30 26 2 MIN. QFF PRESSURE IN HPA 1006.7 1004.3 997.2 994.5 993.3 991.8 989.4 992.6 ****** 1007.2 1003.6 1009.1 ****** DAY 25 1 28 30 1 5 2 13 ** 16 6 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 887.4 885.1 882.8 882.4 882.8 882.2 880.5 881.9 886.9 890.0 887.3 887.9 884.8 MAX. QFE PRESSURE IN HPA 896.1 889.8 891.6 889.6 888.5 888.7 887.0 886.3 891.8 895.1 893.2 894.0 896.1 DAY 9 4 6 20 30 10 24 3 27 29 16 12 MIN. QFE PRESSURE IN HPA 878.3 877.1 873.4 873.8 874.2 874.7 875.1 877.6 883.0 884.8 881.5 882.7 873.4 DAY 3 3 13 30 1 5 2 14 19 16 6 26 MEAN QNH PRESSURE IN HPA 1016.1 1013.5 1010.9 1010.5 1011.0 1010.3 1008.5 1010.0 1015.5 1019.0 1016.0 1016.7 1013.2 MAX. QNH PRESSURE IN HPA 1025.8 1018.8 1020.8 1018.6 1017.3 1017.6 1015.7 1014.9 1021.0 1024.7 1022.6 1023.5 1025.8 DAY 9 4 6 20 30 10 24 3 27 29 16 12 MIN. QNH PRESSURE IN HPA 1006.0 1004.6 1000.5 1000.9 1001.4 1001.9 1002.4 1005.2 1011.2 1013.2 1009.5 1010.9 1000.5 DAY 3 3 13 30 1 5 2 14 19 16 6 26 MEAN QFF PRESSURE IN HPA 1018.2 1013.2 1008.0 1006.3 1004.4 1001.9 998.2 1000.1 1008.1 1014.9 1014.6 1017.5 1008.8 MAX. QFF PRESSURE IN HPA 1027.8 1022.0 1018.5 1017.7 1011.9 1011.1 1007.7 1005.8 1016.8 1021.9 1023.4 1024.6 1027.8 DAY 9 4 1 3 30 10 24 3 24 30 26 12 MIN. QFF PRESSURE IN HPA 1007.0 1006.4 999.0 996.4 995.3 992.7 991.2 994.5 1002.7 1008.6 1005.9 1010.1 991.2 DAY 25 3 28 30 16 5 2 14 22 16 6 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 888.5 886.1 883.7 883.3 883.5 882.7 881.2 882.9 888.1 891.1 888.5 888.9 885.7 MAX. QFE PRESSURE IN HPA 896.8 891.4 892.6 890.2 889.1 889.6 887.7 887.2 893.4 896.3 894.6 895.2 896.8 DAY 9 7 5 20 30 10 24 3 27 29 16 12 MIN. QFE PRESSURE IN HPA 879.3 878.7 874.2 874.7 875.0 874.7 876.1 878.6 884.2 885.1 883.4 883.5 874.2 DAY 25 1 13 30 16 5 2 14 19 16 5 29 MEAN QNH PRESSURE IN HPA 1017.4 1014.7 1011.9 1011.6 1011.8 1010.9 1009.2 1011.1 1016.9 1020.2 1017.3 1017.8 1014.2 MAX. QNH PRESSURE IN HPA 1026.6 1020.6 1021.9 1019.2 1018.0 1018.6 1016.5 1015.9 1022.8 1026.0 1024.2 1024.8 1026.6 DAY 9 7 5 20 30 10 24 3 27 29 16 12 MIN. QNH PRESSURE IN HPA 1007.1 1006.4 1001.4 1001.9 1002.3 1001.9 1003.5 1006.3 1012.5 1013.6 1011.7 1011.8 1001.4 DAY 25 1 13 30 16 5 2 14 19 16 5 29 MEAN QFF PRESSURE IN HPA 1018.9 1014.6 1009.3 1006.6 1004.6 1002.0 998.6 1000.7 1008.5 1015.2 1014.9 1017.9 1009.3 MAX. QFF PRESSURE IN HPA 1027.9 1022.4 1022.9 1018.6 1012.1 1011.2 1007.3 1006.1 1017.5 1022.1 1023.4 1024.7 1027.9 DAY 9 4 5 3 30 10 24 3 24 29 26 12 MIN. QFF PRESSURE IN HPA 1007.1 1007.1 999.5 995.5 994.0 991.5 992.3 995.2 1003.0 1007.9 1006.9 1011.8 991.5 DAY 25 1 12 29 16 5 2 14 19 16 4 26 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 887.7 885.6 882.8 882.7 882.7 881.9 880.5 882.1 887.2 890.3 887.6 887.9 884.9 MAX. QFE PRESSURE IN HPA 896.5 890.8 892.5 889.9 888.8 888.7 886.4 886.7 892.4 895.8 893.5 894.6 896.5 DAY 9 4 5 19 21 10 24 3 27 29 26 1 MIN. QFE PRESSURE IN HPA 878.5 877.4 873.2 873.7 874.9 874.0 875.5 878.0 882.9 884.1 880.7 882.6 873.2 DAY 25 1 13 30 16 5 5 14 19 16 5 19 MEAN QNH PRESSURE IN HPA 1016.4 1014.1 1011.0 1010.8 1010.9 1010.0 1008.4 1010.2 1015.9 1019.4 1016.4 1016.7 1013.3 MAX. QNH PRESSURE IN HPA 1026.3 1019.9 1021.8 1018.9 1017.7 1017.6 1015.0 1015.3 1021.7 1025.5 1022.9 1024.2 1026.3 DAY 9 4 5 19 21 10 24 3 27 29 26 1 MIN. QNH PRESSURE IN HPA 1006.2 1005.0 1000.3 1000.8 1002.2 1001.2 1002.8 1005.6 1011.1 1012.4 1008.6 1010.8 1000.3 DAY 25 1 13 30 16 5 5 14 19 16 5 19 MEAN QFF PRESSURE IN HPA 1017.1 1013.2 1007.7 1005.5 1003.3 1000.8 997.4 999.2 ****** 1013.8 1013.2 1015.8 ****** MAX. QFF PRESSURE IN HPA 1026.2 1021.2 1022.0 1016.7 1010.0 1009.7 1005.2 1005.0 ****** 1020.6 1021.4 1023.1 ****** DAY 9 4 5 3 30 10 24 3 ** 30 26 12 MIN. QFF PRESSURE IN HPA 1005.0 1004.0 997.4 994.9 993.4 992.2 991.1 993.7 ****** 1005.9 1002.9 1009.1 ****** DAY 25 1 13 30 16 5 5 14 ** 16 5 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 886.4 884.1 881.2 880.6 881.4 880.5 878.8 880.3 885.4 889.0 886.4 886.7 883.4 MAX. QFE PRESSURE IN HPA 895.1 889.2 891.1 889.0 887.6 887.1 884.2 885.0 890.7 894.5 892.2 893.7 895.1 DAY 9 4 5 19 21 9 23 3 27 29 26 1 MIN. QFE PRESSURE IN HPA 877.4 876.2 872.3 871.2 873.6 873.5 873.7 876.1 880.5 882.6 879.3 881.2 871.2 DAY 25 1 13 30 1 5 5 13 19 16 5 19 MEAN QNH PRESSURE IN HPA 1015.0 1012.5 1009.2 1008.6 1009.4 1008.4 1006.6 1008.2 1013.9 1017.9 1015.0 1015.3 1011.7 MAX. QNH PRESSURE IN HPA 1024.7 1018.1 1020.2 1017.9 1016.3 1015.8 1012.5 1013.4 1019.8 1024.0 1021.5 1023.2 1024.7 DAY 9 4 5 19 21 9 23 3 27 29 26 1 MIN. QNH PRESSURE IN HPA 1005.0 1003.6 999.3 998.0 1000.7 1000.6 1000.8 1003.5 1008.4 1010.8 1007.1 1009.2 998.0 DAY 25 1 13 30 1 5 5 13 19 16 5 19 MEAN QFF PRESSURE IN HPA 1015.7 1011.4 1005.1 1002.9 1002.2 999.3 995.6 997.3 ****** 1012.6 1012.2 1014.6 ****** MAX. QFF PRESSURE IN HPA 1024.9 1019.5 1017.7 1013.6 1008.7 1009.2 1003.3 1003.4 ****** 1019.2 1020.3 1021.8 ****** DAY 9 4 6 19 2 9 23 3 ** 30 26 1 MIN. QFF PRESSURE IN HPA 1003.8 1003.4 996.2 991.4 995.3 991.5 988.9 991.6 ****** 1004.6 1002.7 1007.6 ****** DAY 25 1 13 29 1 5 5 13 ** 16 5 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1981 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 886.9 884.4 881.4 880.5 881.2 880.3 878.4 880.0 885.3 889.1 886.8 887.1 883.5 MAX. QFE PRESSURE IN HPA 895.0 889.5 891.3 889.0 887.2 887.1 884.0 884.6 890.2 894.8 892.6 894.4 895.0 DAY 9 4 5 19 21 9 29 3 27 29 26 1 MIN. QFE PRESSURE IN HPA 878.2 877.7 873.1 869.6 874.9 875.0 872.6 875.6 880.5 882.4 879.4 881.9 869.6 DAY 25 1 12 30 1 5 1 13 19 16 22 19 MEAN QNH PRESSURE IN HPA 1015.6 1012.8 1009.4 1008.5 1009.2 1008.1 1006.1 1007.9 1013.8 1018.0 1015.5 1015.8 1011.7 MAX. QNH PRESSURE IN HPA 1024.6 1018.5 1020.5 1017.9 1015.9 1015.8 1012.3 1013.0 1019.2 1024.4 1021.9 1023.9 1024.6 DAY 9 4 5 19 21 9 29 3 27 29 26 1 MIN. QNH PRESSURE IN HPA 1005.8 1005.3 1000.2 996.2 1002.2 1002.3 999.6 1002.9 1008.4 1010.5 1007.2 1010.0 996.2 DAY 25 1 12 30 1 5 1 13 19 16 22 19 MEAN QFF PRESSURE IN HPA 1017.6 1012.4 1006.4 1003.7 1002.6 999.7 995.9 997.8 1006.3 1013.8 1014.1 1016.5 1007.2 MAX. QFF PRESSURE IN HPA 1026.2 1021.5 1018.3 1015.6 1009.3 1009.3 1003.6 1003.7 1014.7 1020.9 1022.5 1024.0 1026.2 DAY 9 4 4 3 2 9 24 3 23 28 26 1 MIN. QFF PRESSURE IN HPA 1006.2 1006.7 997.8 991.0 996.2 993.2 988.3 992.2 999.9 1005.4 1004.2 1009.9 988.3 DAY 25 1 12 30 12 30 1 13 19 16 5 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 887.5 884.9 882.2 881.5 882.3 881.0 879.4 881.2 886.2 889.8 887.4 887.6 884.2 MAX. QFE PRESSURE IN HPA 896.4 889.8 891.8 890.2 887.6 888.0 885.0 886.2 891.0 895.3 893.2 895.2 896.4 DAY 8 4 5 19 21 9 23 3 23 29 15 1 MIN. QFE PRESSURE IN HPA 879.3 877.8 873.3 871.5 876.7 876.0 873.2 877.4 882.2 884.6 879.7 882.1 871.5 DAY 3 2 12 30 12 15 1 12 19 16 22 18 MEAN QNH PRESSURE IN HPA 1016.2 1013.3 1010.3 1009.6 1010.4 1009.0 1007.2 1009.2 1014.8 1018.8 1016.1 1016.3 1012.6 MAX. QNH PRESSURE IN HPA 1026.2 1018.8 1021.0 1019.2 1016.3 1016.8 1013.4 1014.8 1020.1 1024.9 1022.6 1024.8 1026.2 DAY 8 4 5 19 21 9 23 3 23 29 15 1 MIN. QNH PRESSURE IN HPA 1007.1 1005.4 1000.4 998.4 1004.2 1003.4 1000.3 1005.0 1010.3 1013.0 1007.5 1010.2 998.4 DAY 3 2 12 30 12 15 1 12 19 16 22 18 MEAN QFF PRESSURE IN HPA 1017.7 1013.3 1007.6 1004.6 1003.2 1000.0 996.6 998.8 1006.5 1013.8 1013.8 1016.5 1007.7 MAX. QFF PRESSURE IN HPA 1028.1 1020.9 1021.5 1015.1 1008.6 1009.7 1004.5 1005.0 1016.4 1021.6 1022.2 1024.4 1028.1 DAY 8 4 5 19 2 9 23 3 23 29 26 1 MIN. QFF PRESSURE IN HPA 1007.6 1007.2 996.9 993.0 995.5 993.5 988.8 994.0 1000.8 1007.1 1004.3 1010.1 988.8 DAY 25 2 27 30 15 30 1 12 19 16 5 18 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 887.2 885.0 882.2 881.6 882.4 881.4 879.6 881.4 ****** 889.8 887.3 887.5 ****** MAX. QFE PRESSURE IN HPA 896.4 890.0 891.6 890.0 888.2 888.5 885.3 886.1 ****** 895.3 893.1 894.9 ****** DAY 8 4 5 19 21 9 24 31 ** 29 15 1 MIN. QFE PRESSURE IN HPA 878.8 876.9 872.8 871.5 875.0 875.9 873.5 877.0 ****** 884.6 880.0 882.1 ****** DAY 31 2 12 30 15 15 1 13 ** 16 22 18 MEAN QNH PRESSURE IN HPA 1015.9 1013.4 1010.3 1009.6 1010.5 1009.5 1007.5 1009.4 ****** 1018.8 1016.0 1016.2 ****** MAX. QNH PRESSURE IN HPA 1026.2 1019.0 1020.8 1019.0 1017.0 1017.3 1013.8 1014.7 ****** 1024.9 1022.5 1024.5 ****** DAY 8 4 5 19 21 9 24 31 ** 29 15 1 MIN. QNH PRESSURE IN HPA 1006.5 1004.4 999.8 998.4 1002.3 1003.3 1000.6 1004.5 ****** 1013.0 1007.9 1010.2 ****** DAY 31 2 12 30 15 15 1 13 ** 16 22 18 MEAN QFF PRESSURE IN HPA 1016.6 1012.5 1006.9 1004.2 1003.0 1000.2 996.5 998.6 ****** 1013.4 1012.9 1015.4 ****** MAX. QFF PRESSURE IN HPA 1026.4 1020.2 1020.8 1015.3 1008.7 1009.4 1004.3 1004.3 ****** 1020.9 1021.0 1023.0 ****** DAY 8 4 5 2 18 9 24 3 ** 29 26 1 MIN. QFF PRESSURE IN HPA 1005.0 1006.0 996.8 992.7 992.6 993.2 989.0 992.8 ****** 1006.5 1003.4 1009.0 ****** DAY 31 2 12 30 15 30 1 13 ** 16 5 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.5 3.4 9.3 20.8 24.1 28.6 30.3 29.3 25.8 17.7 8.8 2.7 17.1 MINIMUN AIR TEMPERATURE (C) 0.0 -1.2 3.8 14.3 17.9 22.2 23.3 23.0 18.5 12.2 4.8 -1.1 11.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 2 21 28 23 4 0 0 0 78 DAYS WITH MINIMUM TEMP. <=-4 4 4 0 0 0 0 0 0 0 0 0 3 11 DAYS WITH FREEZING MIN.<= 0 15 18 2 0 0 0 0 0 0 0 1 25 61 TEMPERATURE RECORDS LOWEST(C) -5.0 -7.4 -1.0 5.6 11.4 18.2 18.4 18.4 15.2 6.0 0.0 -4.2 -7.4 DAY 20 18 8 1 29 30 2 25 22 26 30 10 MAXIMUM AIR TEMPERATURE (C) 11.0 10.2 16.3 28.3 30.9 35.7 37.5 36.6 32.1 21.7 12.6 6.7 23.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 12 20 30 31 31 22 0 0 0 146 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 16.8 16.6 21.0 32.6 35.4 40.0 39.8 41.4 36.0 27.0 18.2 11.4 41.4 DAY 10 4 24 24 19 10 17 4 5 1 8 19 DIF. BETWEEN (MAX.-MIN.) (C) 11.0 11.4 12.5 14.0 13.0 13.5 14.2 13.6 13.6 9.5 7.8 7.8 11.8 MEAN DAILY TEMP. (MDT) (C) 5.5 4.5 10.0 21.3 24.4 29.0 30.4 29.8 25.3 16.9 8.7 2.8 17.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 45.5 110.0 239.2 290.4 272.5 128.3 0.0 0.0 0.0 1086.1 HEATING DEG. DAYS(BASE 18 0C) 387.7 377.7 247.2 10.1 0.0 0.0 0.0 0.0 0.0 55.7 279.4 471.1 1829.1 DEWPOINT (MEAN C) -2.2 -4.8 -1.5 3.2 6.8 8.4 10.6 11.2 8.0 5.5 0.8 -4.6 3.5 MIXING RATIO (G/KG) 3.77 3.16 4.05 5.61 7.21 8.09 9.37 9.91 7.77 6.56 4.67 3.13 6.11 VAPOUR PRESSURE (HPA) 5.33 4.46 5.71 7.89 10.15 11.30 13.04 13.78 10.92 9.23 6.61 4.44 8.57 SATURATION DEF. (HPA) 3.43 3.67 6.50 17.87 21.10 29.15 31.56 28.56 23.19 11.68 5.01 3.12 15.40 RELATIVE HUMIDITY (MEAN %) 64 57 50 32 35 29 30 33 33 46 59 61 44 RELATIVE HUMIDITY (MAX. %) 80 75 72 42 48 38 37 38 37 57 73 75 56 RELATIVE HUMIDITY (MIN. %) 45 39 32 24 26 24 25 28 29 38 47 47 34 RELATIVE HUMIDITY (MEAN% 03UTC) 74 70 67 39 43 34 35 36 36 57 69 69 52 RELATIVE HUMIDITY (MEAN% 09UTC) 51 49 41 28 30 26 28 30 31 42 52 53 38 RELATIVE HUMIDITY (MEAN% 15UTC) 61 51 40 27 28 25 27 31 31 43 59 62 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 20.2 30.6 21.7 10.2 27.4 2.3 2.0 0.0 0.0 42.0 38.1 27.4 221.9 DAYS WITH PRECIPITATION >=10 1 1 0 0 1 0 0 0 0 1 1 1 6 DAYS WITH PRECIPITATION >= 5 2 2 3 1 2 0 0 0 0 4 2 3 19 DAYS WITH PRECIPITATION >= 1 5 3 5 2 5 1 1 0 0 5 6 3 36 DAYS WITH PRECIPITATION 6 3 8 3 5 2 1 0 0 8 8 3 47 GREATEST DAILY PRECIPITATION 10.0 22.0 6.2 8.0 16.2 2.0 2.0 0.0 0.0 14.0 12.8 17.0 22.0 DAY 29 14 25 22 27 27 7 ** ** 9 1 30 DAY WITH THUNDER STORM 0 0 0 3 6 2 1 0 0 2 0 0 14 DAYS WITH SNOW OR SLEET 3 2 1 0 0 0 0 0 0 0 0 3 9 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 225 360 360 180 225 360 360 360 315 225 360 360 360 PREVAILING WIND SPEED(KNOTS) 11.0 6.9 8.0 9.1 10.9 13.0 10.3 11.3 10.2 13.6 8.5 10.0 10.0 PREVAILING WIND PERCENT 0.8 5.8 6.0 5.4 6.0 9.2 10.9 12.5 5.4 3.0 2.2 1.1 5.6 CALMS PERCENT OF WIND 98.0 85.3 83.1 81.7 75.4 77.5 75.8 76.2 85.4 94.7 97.2 98.9 84.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 205 169 180 186 2684 VECTOR WIND DIRECTION (MEAN) 285 311 275 265 294 353 356 18 324 274 5 356 333 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.5 0.6 0.5 0.9 1.3 1.6 1.5 0.8 0.4 0.3 0.1 0.6 WIND STEADINESES (MEAN %) 50.0 45.5 40.0 33.3 37.5 52.0 72.7 60.0 57.1 57.1 100.0 100.0 42.9 WIND SPEED (MEAN KNOTS) 0.2 1.1 1.5 1.5 2.4 2.5 2.2 2.5 1.4 0.7 0.3 0.1 1.4 FASTEST WIND DIRECTION 230 210 240 190 340 360 360 360 330 300 30 210 360 FASTEST WIND SPEED (KNOTS) 14 16 19 16 17 27 19 19 23 25 16 16 27 DAY 2 5 12 1 8 24 4 9 28 5 10 3 DAYS WITH SKY CLEAR (0-2)/8 14 16 15 10 14 28 29 29 29 17 17 15 233 DAYS WITH P.CLOUDY (3-6)/8 11 7 11 19 17 2 2 2 1 11 8 12 103 DAYS WITH CLOUDY (7-8)/8 6 5 5 1 0 0 0 0 0 3 5 4 29 DAYS WITH VISIBILITY =< 2 KM 0 1 0 2 1 0 1 0 0 0 1 0 6 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** 155.2 155.4 152.4 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 886.1 884.0 883.3 883.8 885.7 881.0 879.2 880.0 885.6 885.1 886.6 887.0 883.9 MAX. QFE PRESSURE IN HPA 895.1 894.1 892.5 895.4 894.2 888.5 885.3 885.6 892.2 894.3 895.2 895.8 895.8 DAY-HOUR 19- 6 11- 6 5- 6 4- 9 12- 6 7- 6 8- 6 27- 6 20- 6 25- 6 18- 6 10- 6 MIN. QFE PRESSURE IN HPA 874.4 872.7 874.4 875.0 878.2 875.3 869.0 870.6 880.0 877.4 878.9 878.6 869.0 DAY-HOUR 29- 3 14- 3 25- 6 27-15 23-12 24-15 31-15 1- 0 13-12 1-12 8-12 28-12 MEAN QNH PRESSURE IN HPA 1014.6 1012.3 1011.5 1012.1 1014.2 1008.9 1007.0 1007.8 1014.1 1013.5 1015.2 1015.6 1012.2 MAX. QNH PRESSURE IN HPA 1024.7 1023.6 1021.8 1025.0 1023.7 1017.3 1013.8 1014.1 1021.5 1023.8 1024.8 1025.5 1025.5 DAY-HOUR 19- 6 11- 6 5- 6 4- 9 12- 6 7- 6 8- 6 27- 6 20- 6 25- 6 18- 6 10- 6 MIN. QNH PRESSURE IN HPA 1001.6 999.7 1001.6 1002.3 1005.8 1002.6 995.6 997.4 1007.9 1005.0 1006.6 1006.3 995.6 DAY-HOUR 29- 3 14- 3 25- 6 27-15 23-12 24-15 31-15 1- 0 13-12 1-12 8-12 28-12 MEAN QFF PRESSURE IN HPA 1016.1 1014.3 1010.5 1005.8 1006.3 999.0 996.3 997.5 1005.8 ****** 1015.2 1018.9 ****** MAX. QFF PRESSURE IN HPA 1028.5 1026.3 1022.2 1021.0 1016.9 1007.7 1004.7 1005.3 1014.2 ****** 1026.3 1029.7 ****** DAY-HOUR 19- 6 20- 6 5- 6 4- 9 10- 3 7- 6 7-15 28- 3 20-18 **-** 18- 6 10- 6 MIN. QFF PRESSURE IN HPA 1000.5 999.5 997.9 994.1 997.0 992.6 983.7 985.6 998.6 ****** 1004.8 1008.7 ****** DAY-HOUR 29- 0 5- 0 25- 6 27-15 23-12 24-12 31-12 1- 0 13-12 **-** 9- 3 28-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 886.0 883.4 883.0 883.5 885.8 880.9 879.3 879.7 ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 894.2 891.6 890.4 892.4 892.7 886.0 884.1 884.4 ****** ****** ****** ****** ****** DAY 19 11 5 5 11 7 20 28 ** ** ** ** MIN. QFE PRESSURE IN HPA 874.6 874.0 874.8 876.1 880.7 877.0 870.4 870.6 ****** ****** ****** ****** ****** DAY 29 5 25 28 15 15 31 1 ** ** ** ** MEAN QNH PRESSURE IN HPA 1014.6 1011.7 1011.2 1011.8 1014.3 1008.8 1007.1 1007.5 ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1023.7 1020.8 1019.5 1021.7 1022.0 1014.6 1012.4 1012.8 ****** ****** ****** ****** ****** DAY 19 11 5 5 11 7 20 28 ** ** ** ** MIN. QNH PRESSURE IN HPA 1001.8 1001.2 1002.1 1003.5 1008.6 1004.5 997.1 997.4 ****** ****** ****** ****** ****** DAY 29 5 25 28 15 15 31 1 ** ** ** ** MEAN QFF PRESSURE IN HPA 1015.6 1013.2 1009.9 1005.3 1006.3 998.8 996.4 996.9 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1026.4 1023.7 1019.6 1018.0 1015.0 1004.8 1002.4 1003.2 ****** ****** ****** ****** ****** DAY 19 20 5 5 10 4 8 28 ** ** ** ** MIN. QFF PRESSURE IN HPA 1000.5 999.5 998.1 994.5 999.7 993.2 984.7 985.6 ****** ****** ****** ****** ****** DAY 29 5 25 28 15 12 31 1 ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 886.1 883.9 883.6 884.2 886.4 881.8 880.0 880.4 885.9 885.1 886.3 886.9 884.2 MAX. QFE PRESSURE IN HPA 894.3 892.8 891.3 893.1 893.2 887.6 885.1 885.3 890.9 892.4 893.6 894.7 894.7 DAY 19 11 5 4 10 7 20 28 20 25 18 10 MIN. QFE PRESSURE IN HPA 874.4 872.7 875.6 876.7 881.3 878.0 872.2 871.8 881.5 879.8 880.0 881.4 871.8 DAY 29 14 25 28 15 15 31 1 14 21 8 28 MEAN QNH PRESSURE IN HPA 1014.7 1012.2 1011.8 1012.6 1015.0 1009.8 1007.9 1008.3 1014.5 1013.6 1014.9 1015.5 1012.6 MAX. QNH PRESSURE IN HPA 1023.8 1022.1 1020.5 1022.5 1022.6 1016.3 1013.6 1013.8 1020.0 1021.7 1023.0 1024.3 1024.3 DAY 19 11 5 4 10 7 20 28 20 25 18 10 MIN. QNH PRESSURE IN HPA 1001.6 999.7 1002.9 1004.2 1009.3 1005.6 999.1 998.7 1009.5 1007.6 1007.9 1009.4 998.7 DAY 29 14 25 28 15 15 31 1 14 21 8 28 MEAN QFF PRESSURE IN HPA 1016.9 1014.8 1011.3 1007.0 1007.6 1000.5 997.9 998.7 1007.0 1009.4 1014.9 1018.7 1008.7 MAX. QFF PRESSURE IN HPA 1027.8 1026.0 1021.8 1019.2 1016.9 1007.1 1004.7 1005.3 1013.6 1019.6 1025.0 1029.0 1029.0 DAY 19 20 5 4 10 7 8 28 21 26 18 10 MIN. QFF PRESSURE IN HPA 1001.8 1000.3 999.4 996.3 1001.2 995.1 987.6 987.9 1001.5 1001.6 1004.8 1012.2 987.6 DAY 29 14 25 28 15 12 30 1 12 1 9 30 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 887.2 885.0 884.6 885.2 887.1 882.5 880.6 881.3 886.9 886.3 887.7 888.0 885.2 MAX. QFE PRESSURE IN HPA 895.1 894.1 892.5 895.3 894.2 888.5 885.3 885.6 892.2 894.3 895.2 895.8 895.8 DAY 19 11 5 4 12 7 8 27 20 25 18 10 MIN. QFE PRESSURE IN HPA 875.6 873.2 874.4 878.4 881.8 878.2 872.8 873.0 882.8 880.6 881.1 881.5 872.8 DAY 29 14 25 18 15 24 31 1 24 1 8 28 MEAN QNH PRESSURE IN HPA 1015.9 1013.4 1013.0 1013.7 1015.7 1010.6 1008.5 1009.3 1015.5 1014.9 1016.5 1016.8 1013.6 MAX. QNH PRESSURE IN HPA 1024.7 1023.6 1021.8 1024.9 1023.7 1017.3 1013.8 1014.1 1021.5 1023.8 1024.8 1025.5 1025.5 DAY 19 11 5 4 12 7 8 27 20 25 18 10 MIN. QNH PRESSURE IN HPA 1002.9 1000.3 1001.6 1006.1 1009.9 1005.8 999.8 1000.0 1011.0 1008.5 1009.1 1009.5 999.8 DAY 29 14 25 18 15 24 31 1 24 1 8 28 MEAN QFF PRESSURE IN HPA 1017.9 1015.8 1012.1 1007.5 1007.9 1000.7 997.8 999.0 1007.2 ****** 1016.2 1019.8 ****** MAX. QFF PRESSURE IN HPA 1028.5 1026.3 1022.2 1021.0 1016.9 1007.7 1004.4 1005.1 1014.1 ****** 1026.3 1029.7 ****** DAY 19 20 5 4 10 7 8 28 20 ** 18 10 MIN. QFF PRESSURE IN HPA 1004.1 1000.9 997.9 997.6 1001.1 995.1 988.0 988.4 1002.2 ****** 1006.4 1012.1 ****** DAY 29 14 25 28 15 24 30 1 14 ** 8 28 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 886.5 884.7 884.1 884.4 886.3 881.8 879.9 880.6 886.1 885.4 887.0 887.2 884.5 MAX. QFE PRESSURE IN HPA 894.0 893.9 891.7 895.4 893.9 888.3 884.6 885.0 892.0 893.6 895.0 895.2 895.4 DAY 21 11 5 4 12 7 20 31 20 25 18 10 MIN. QFE PRESSURE IN HPA 876.9 873.9 874.9 877.5 880.5 877.9 871.8 872.7 881.9 878.4 880.0 880.2 871.8 DAY 17 14 25 18 15 24 31 1 24 1 8 28 MEAN QNH PRESSURE IN HPA 1015.1 1013.1 1012.4 1012.8 1014.9 1009.9 1007.8 1008.6 1014.7 1013.9 1015.6 1015.9 1012.9 MAX. QNH PRESSURE IN HPA 1023.5 1023.4 1020.9 1025.0 1023.4 1017.1 1013.0 1013.4 1021.3 1023.0 1024.6 1024.8 1025.0 DAY 21 11 5 4 12 7 20 31 20 25 18 10 MIN. QNH PRESSURE IN HPA 1004.4 1001.0 1002.2 1005.1 1008.4 1005.5 998.7 999.7 1010.0 1006.1 1007.9 1008.1 998.7 DAY 17 14 25 18 15 24 31 1 24 1 8 28 MEAN QFF PRESSURE IN HPA 1016.2 1014.5 1010.9 1006.0 1006.6 999.6 996.5 997.6 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1027.0 1025.2 1020.9 1021.0 1016.0 1007.1 1002.4 1003.8 ****** ****** ****** ****** ****** DAY 19 11 5 4 12 7 8 31 ** ** ** ** MIN. QFF PRESSURE IN HPA 1004.6 1002.2 999.3 996.1 999.1 994.7 986.2 987.5 ****** ****** ****** ****** ****** DAY 17 14 25 28 15 24 31 1 ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 885.2 883.3 882.4 882.7 884.4 880.0 878.3 879.0 884.6 884.4 885.9 886.1 883.0 MAX. QFE PRESSURE IN HPA 892.8 891.6 889.0 893.8 892.1 886.3 883.0 883.6 890.1 893.2 894.3 892.0 894.3 DAY 21 11 15 4 12 7 8 31 20 25 18 10 MIN. QFE PRESSURE IN HPA 875.4 874.5 874.4 875.9 878.2 876.1 869.6 871.4 880.0 877.4 878.9 878.6 869.6 DAY 17 14 25 18 23 24 31 1 13 1 8 28 MEAN QNH PRESSURE IN HPA 1013.7 1011.5 1010.5 1010.9 1012.8 1007.9 1006.0 1006.7 1012.9 1012.7 1014.4 1014.6 1011.2 MAX. QNH PRESSURE IN HPA 1022.1 1020.8 1017.9 1023.3 1021.4 1014.9 1011.2 1011.9 1019.1 1022.6 1023.8 1021.3 1023.8 DAY 21 11 15 4 12 7 8 31 20 25 18 10 MIN. QNH PRESSURE IN HPA 1002.7 1001.7 1001.6 1003.3 1005.8 1003.5 996.2 998.3 1007.9 1005.0 1006.6 1006.3 996.2 DAY 17 14 25 18 23 24 31 1 13 1 8 28 MEAN QFF PRESSURE IN HPA 1014.5 1013.0 1009.1 1004.2 1004.6 997.6 994.9 995.9 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1025.6 1023.0 1016.8 1019.5 1014.2 1004.4 1000.8 1002.2 ****** ****** ****** ****** ****** DAY 21 20 5 4 12 7 7 31 ** ** ** ** MIN. QFF PRESSURE IN HPA 1003.2 1002.9 998.6 995.2 997.0 992.6 983.7 986.2 ****** ****** ****** ****** ****** DAY 17 1 19 18 23 24 31 1 ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1982 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 885.5 883.6 882.4 882.5 884.0 879.5 877.8 878.6 884.4 884.5 886.2 886.5 883.0 MAX. QFE PRESSURE IN HPA 893.0 891.5 889.4 893.4 891.7 884.6 884.9 883.1 889.4 892.8 894.6 893.2 894.6 DAY 21 11 15 4 10 7 7 31 20 25 18 9 MIN. QFE PRESSURE IN HPA 876.3 875.8 874.5 875.0 878.4 875.3 869.0 871.1 880.0 877.5 879.9 879.0 869.0 DAY 17 14 25 27 23 24 31 1 13 1 8 28 MEAN QNH PRESSURE IN HPA 1014.0 1011.8 1010.6 1010.7 1012.4 1007.3 1005.4 1006.3 1012.8 1012.9 1014.8 1015.1 1011.2 MAX. QNH PRESSURE IN HPA 1022.4 1020.7 1018.4 1022.8 1020.9 1013.0 1013.3 1011.3 1018.4 1022.1 1024.2 1022.6 1024.2 DAY 21 11 15 4 10 7 7 31 20 25 18 9 MIN. QNH PRESSURE IN HPA 1003.7 1003.2 1001.7 1002.3 1006.1 1002.6 995.6 997.9 1007.9 1005.1 1007.7 1006.7 995.6 DAY 17 14 25 27 23 24 31 1 13 1 8 28 MEAN QFF PRESSURE IN HPA 1016.1 1014.3 1010.2 1004.9 1004.9 997.8 995.1 996.4 1005.2 1008.8 1014.8 1018.2 1007.2 MAX. QFF PRESSURE IN HPA 1027.3 1023.7 1018.8 1019.8 1014.7 1003.5 1004.7 1002.9 1012.1 1020.6 1025.9 1027.5 1027.5 DAY 21 20 5 4 10 7 7 31 20 25 18 9 MIN. QFF PRESSURE IN HPA 1004.4 1004.8 999.8 994.1 998.1 993.1 984.2 986.7 999.3 998.8 1005.2 1008.7 984.2 DAY 17 4 25 27 23 11 31 1 11 1 8 28 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 886.1 884.3 883.2 883.8 885.4 880.5 878.7 880.0 885.4 ****** 886.7 887.2 ****** MAX. QFE PRESSURE IN HPA 894.0 891.6 890.6 894.1 893.2 885.4 884.0 884.6 891.4 ****** 894.8 894.8 ****** DAY 18 11 15 4 10 7 19 27 20 ** 18 9 MIN. QFE PRESSURE IN HPA 877.9 875.1 876.4 876.5 878.9 876.7 870.5 873.2 881.0 ****** 880.3 880.0 ****** DAY 31 4 2 18 23 24 31 1 11 ** 8 28 MEAN QNH PRESSURE IN HPA 1014.6 1012.7 1011.5 1012.1 1013.9 1008.5 1006.4 1007.9 1013.9 ****** 1015.3 1015.9 ****** MAX. QNH PRESSURE IN HPA 1023.5 1020.8 1019.7 1023.6 1022.6 1013.9 1012.3 1013.0 1020.6 ****** 1024.4 1024.4 ****** DAY 18 11 15 4 10 7 19 27 20 ** 18 9 MIN. QNH PRESSURE IN HPA 1005.5 1002.4 1003.8 1003.9 1006.6 1004.2 997.3 1000.3 1009.0 ****** 1008.2 1007.9 ****** DAY 31 4 2 18 23 24 31 1 11 ** 8 28 MEAN QFF PRESSURE IN HPA 1016.5 1015.0 1010.6 1005.8 1006.1 998.7 995.8 997.8 1005.7 ****** 1015.1 1018.9 ****** MAX. QFF PRESSURE IN HPA 1027.0 1024.9 1018.4 1019.9 1015.7 1004.6 1002.3 1003.9 1014.2 ****** 1025.5 1028.8 ****** DAY 21 19 15 4 10 3 20 31 20 ** 18 9 MIN. QFF PRESSURE IN HPA 1006.2 1002.6 1001.1 995.5 998.1 993.7 985.8 988.9 999.5 ****** 1005.0 1009.9 ****** DAY 31 4 24 27 23 11 31 1 11 ** 8 28 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 886.2 884.1 883.2 884.0 885.9 880.9 879.1 880.3 ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 894.0 891.2 890.6 893.7 893.3 886.4 884.1 885.0 ****** ****** ****** ****** ****** DAY 18 10 15 4 10 6 19 31 ** ** ** ** MIN. QFE PRESSURE IN HPA 876.2 874.0 876.1 876.2 881.3 877.2 870.9 873.8 ****** ****** ****** ****** ****** DAY 31 4 2 18 14 11 31 1 ** ** ** ** MEAN QNH PRESSURE IN HPA 1014.7 1012.4 1011.5 1012.3 1014.5 1008.8 1006.8 1008.2 ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1023.5 1020.4 1019.7 1023.2 1022.7 1015.0 1012.4 1013.4 ****** ****** ****** ****** ****** DAY 18 10 15 4 10 6 19 31 ** ** ** ** MIN. QNH PRESSURE IN HPA 1003.6 1001.2 1003.5 1003.6 1009.3 1004.7 997.7 1000.9 ****** ****** ****** ****** ****** DAY 31 4 2 18 14 11 31 1 ** ** ** ** MEAN QFF PRESSURE IN HPA 1015.5 1013.9 1009.9 1005.5 1006.3 998.6 995.8 997.6 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1025.9 1023.8 1018.3 1019.5 1015.0 1005.1 1001.8 1004.1 ****** ****** ****** ****** ****** DAY 19 19 4 4 10 6 20 31 ** ** ** ** MIN. QFF PRESSURE IN HPA 1003.0 999.9 999.9 994.5 1000.1 993.2 985.6 988.0 ****** ****** ****** ****** ****** DAY 31 4 18 27 14 11 30 7 ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.3 5.4 8.2 16.2 23.0 29.5 33.4 32.0 26.1 18.1 12.8 5.0 17.5 MINIMUN AIR TEMPERATURE (C) -3.7 0.5 3.1 10.9 17.5 23.2 27.3 26.5 20.9 12.7 8.2 1.7 12.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 3 26 31 31 11 0 0 0 102 DAYS WITH MINIMUM TEMP. <=-4 17 1 0 0 0 0 0 0 0 0 0 0 18 DAYS WITH FREEZING MIN.<= 0 25 10 4 0 0 0 0 0 0 0 0 12 51 TEMPERATURE RECORDS LOWEST(C) -10.6 -4.5 -3.2 2.2 12.0 16.0 23.2 21.5 13.8 7.2 3.0 -3.0 -10.6 DAY 12 23 1 2 3 2 2 27 16 22 27 25 MAXIMUM AIR TEMPERATURE (C) 4.1 10.6 13.6 21.7 28.6 35.3 39.2 37.9 31.8 24.4 18.6 9.7 23.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 12 28 31 31 23 3 0 0 128 DAYS WITH MAXIMUM TEMP. <= 0 9 0 0 0 0 0 0 0 0 0 0 0 9 TEMPERATURE RECORDS HIGHEST(C) 13.4 14.6 20.6 27.4 34.2 39.0 41.6 42.4 38.2 31.2 26.2 17.2 42.4 DAY 2 21 28 18 17 20 23 16 8 3 1 3 DIF. BETWEEN (MAX.-MIN.) (C) 7.8 10.1 10.5 10.8 11.1 12.1 11.9 11.4 10.9 11.7 10.4 8.0 10.6 MEAN DAILY TEMP. (MDT) (C) 0.2 5.6 8.3 16.3 23.0 29.3 33.2 32.2 26.3 18.6 13.4 5.7 17.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.6 76.0 248.1 379.2 347.3 164.0 11.5 0.0 0.0 1228.7 HEATING DEG. DAYS(BASE 18 0C) 551.5 348.4 299.1 71.3 1.1 0.0 0.0 0.0 0.0 26.0 140.3 380.9 1818.7 DEWPOINT (MEAN C) -6.5 -6.9 -5.1 0.1 6.9 9.1 8.9 10.5 7.0 -0.1 0.7 -1.5 1.9 MIXING RATIO (G/KG) 2.78 2.72 3.07 4.49 7.27 8.40 8.36 9.24 7.39 4.36 4.58 3.97 5.55 VAPOUR PRESSURE (HPA) 3.93 3.84 4.33 6.32 10.17 11.71 11.62 12.84 10.34 6.17 6.49 5.62 7.78 SATURATION DEF. (HPA) 2.56 5.39 6.95 12.90 18.84 30.71 41.03 35.87 24.76 15.47 8.85 3.47 17.23 RELATIVE HUMIDITY (MEAN %) 63 43 41 35 37 29 23 28 31 30 45 65 39 RELATIVE HUMIDITY (MAX. %) 80 59 58 49 54 35 30 35 40 39 58 82 52 RELATIVE HUMIDITY (MIN. %) 48 32 29 26 27 23 17 21 25 21 34 48 29 RELATIVE HUMIDITY (MEAN% 03UTC) 68 54 54 43 46 34 28 34 38 36 55 69 47 RELATIVE HUMIDITY (MEAN% 09UTC) 53 37 35 30 32 26 19 24 27 24 37 55 33 RELATIVE HUMIDITY (MEAN% 15UTC) 67 38 33 31 31 25 19 24 29 30 44 62 36 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 40.8 17.2 16.1 10.8 41.0 9.0 0.0 0.0 2.4 0.0 0.8 19.1 157.2 DAYS WITH PRECIPITATION >=10 1 0 0 0 1 0 0 0 0 0 0 1 3 DAYS WITH PRECIPITATION >= 5 4 2 1 1 2 1 0 0 0 0 0 1 12 DAYS WITH PRECIPITATION >= 1 7 3 5 3 9 1 0 0 1 0 0 3 32 DAYS WITH PRECIPITATION 10 5 5 6 11 1 0 0 2 1 2 5 48 GREATEST DAILY PRECIPITATION 16.0 8.0 7.0 6.0 17.4 9.0 0.0 0.0 2.2 0.0 0.8 13.0 17.4 DAY 9 18 16 12 19 1 ** ** 15 ** 14 12 DAY WITH THUNDER STORM 0 1 2 0 10 3 0 0 0 1 0 0 17 DAYS WITH SNOW OR SLEET 6 0 0 0 0 0 0 0 0 0 0 2 8 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 360 270 360 225 360 360 360 45 360 360 360 360 360 PREVAILING WIND SPEED(KNOTS) 6.0 10.2 8.4 11.6 9.4 10.9 9.5 9.8 9.9 8.7 7.6 6.4 8.8 PREVAILING WIND PERCENT 1.6 5.6 5.7 4.2 5.6 6.7 8.5 8.1 14.6 18.5 12.1 6.0 7.8 CALMS PERCENT OF WIND 98.4 85.3 87.0 85.4 82.7 78.3 75.0 80.2 72.1 69.4 76.7 91.9 81.5 NO. OF WIND OBSERVATION 186 197 247 240 248 240 248 248 240 248 240 248 2830 VECTOR WIND DIRECTION (MEAN) 340 297 355 299 330 355 30 31 359 336 324 346 348 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.9 0.6 0.7 0.6 0.9 1.4 1.3 1.6 1.7 1.1 0.4 0.8 WIND STEADINESES (MEAN %) 100.0 64.3 54.5 50.0 40.0 42.9 63.6 76.5 64.0 68.0 61.1 80.0 50.0 WIND SPEED (MEAN KNOTS) 0.1 1.4 1.1 1.4 1.5 2.1 2.2 1.7 2.5 2.5 1.8 0.5 1.6 FASTEST WIND DIRECTION 330 330 350 330 340 360 40 60 360 360 240 10 350 FASTEST WIND SPEED (KNOTS) 12 19 29 23 23 19 16 12 17 19 17 12 29 DAY 15 17 16 24 18 2 25 2 8 6 14 3 DAYS WITH SKY CLEAR (0-2)/8 13 20 19 12 12 28 28 30 26 29 20 13 250 DAYS WITH P.CLOUDY (3-6)/8 14 7 8 13 16 2 3 1 4 2 8 13 91 DAYS WITH CLOUDY (7-8)/8 4 1 4 5 3 0 0 0 0 0 2 5 24 DAYS WITH VISIBILITY =< 2 KM 4 0 1 0 0 0 0 0 0 0 0 2 7 DURATION OF SUNSHINE HOURS 159.9 225.8 219.0 208.6 232.0 348.4 362.9 337.9 295.1 281.4 200.0 158.1 3029.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 885.5 883.3 882.9 882.0 881.1 879.5 877.1 877.5 881.2 886.2 888.2 887.5 882.7 MAX. QFE PRESSURE IN HPA 897.4 892.6 891.4 888.6 888.6 888.0 884.9 883.4 886.9 893.3 898.6 896.8 898.6 DAY-HOUR 8- 6 23- 6 26- 6 29-21 18-21 1- 6 12- 6 18- 6 30-21 29- 6 5- 6 4- 6 MIN. QFE PRESSURE IN HPA 868.9 871.8 872.0 876.0 876.0 873.2 868.8 872.0 874.8 876.4 880.9 877.0 868.8 DAY-HOUR 24-15 17-15 5-18 23-12 3-12 21-15 28-15 5-15 8-12 4-15 12-12 12- 3 MEAN QNH PRESSURE IN HPA 1014.0 1011.5 1011.1 1010.1 1009.1 1007.3 1004.6 1005.0 1009.2 1014.8 1017.0 1016.2 1010.8 MAX. QNH PRESSURE IN HPA 1027.3 1021.9 1020.6 1017.5 1017.5 1016.8 1013.3 1011.7 1015.6 1022.7 1028.6 1026.6 1028.6 DAY-HOUR 8- 6 23- 6 26- 6 29-21 18-21 1- 6 12- 6 18- 6 30-21 29- 6 5- 6 4- 6 MIN. QNH PRESSURE IN HPA 995.5 998.7 998.9 1003.4 1003.4 1000.3 995.4 998.9 1002.1 1003.8 1008.9 1004.5 995.4 DAY-HOUR 24-15 17-15 5-18 23-12 3-12 21-15 28-15 5-15 8-12 4-15 12-12 12- 3 MEAN QFF PRESSURE IN HPA 1018.4 1012.2 1010.7 1005.9 1001.6 996.9 992.7 993.6 1000.3 1009.7 1014.4 1017.3 1006.1 MAX. QFF PRESSURE IN HPA 1031.6 1026.5 1020.4 1013.1 1009.4 1009.8 1002.4 1001.0 1009.0 1017.4 1027.8 1026.4 1031.6 DAY-HOUR 8- 6 23- 6 19- 6 14- 3 31- 6 1-15 1- 6 18- 6 15- 6 28- 3 26- 6 25- 6 MIN. QFF PRESSURE IN HPA 996.2 998.4 996.3 995.8 996.5 988.6 982.3 987.4 990.1 996.7 1005.3 1003.7 982.3 DAY-HOUR 24-15 17-15 5-21 23-12 11-15 21-15 28-12 4-15 8-12 4-12 12-12 12- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** 882.5 881.8 880.8 879.4 877.1 877.3 880.9 885.8 888.1 887.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** 889.8 887.4 887.5 886.5 884.2 881.2 885.1 892.2 894.2 894.5 ****** DAY ** ** 26 30 19 1 12 18 30 29 5 4 MIN. QFE PRESSURE IN HPA ****** ****** 873.0 877.8 876.0 874.5 870.0 873.0 876.0 878.0 882.6 877.4 ****** DAY ** ** 6 25 4 29 28 5 8 5 13 12 MEAN QNH PRESSURE IN HPA ****** ****** 1010.6 1009.8 1008.8 1007.2 1004.6 1004.9 1008.8 1014.3 1016.9 1015.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** 1018.8 1016.1 1016.2 1015.1 1012.5 1009.2 1013.6 1021.5 1023.7 1024.0 ****** DAY ** ** 26 30 19 1 12 18 30 29 5 4 MIN. QNH PRESSURE IN HPA ****** ****** 1000.0 1005.4 1003.4 1001.7 996.7 1000.0 1003.4 1005.6 1010.8 1005.0 ****** DAY ** ** 6 25 4 29 28 5 8 5 13 12 MEAN QFF PRESSURE IN HPA ****** ****** 1009.9 1005.5 1001.4 996.9 992.7 993.3 999.7 1009.0 1013.9 1016.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1017.8 1011.2 1008.1 1008.0 1000.9 998.0 1006.8 1016.3 1023.2 1023.5 ****** DAY ** ** 26 30 19 1 12 18 30 28 27 25 MIN. QFF PRESSURE IN HPA ****** ****** 997.8 998.4 996.6 990.4 983.6 988.1 991.7 998.1 1007.0 1003.7 ****** DAY ** ** 6 24 30 22 28 5 9 5 11 12 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 885.1 883.8 883.1 882.2 881.4 880.1 877.8 878.2 881.5 886.3 888.4 887.3 882.9 MAX. QFE PRESSURE IN HPA 896.2 890.8 890.4 887.8 886.0 887.5 884.3 882.1 885.7 892.7 896.8 895.4 896.8 DAY 8 11 26 30 16 1 12 18 30 28 5 4 MIN. QFE PRESSURE IN HPA 873.4 873.5 874.2 878.2 877.4 875.0 870.2 873.6 876.6 879.0 882.7 877.0 870.2 DAY 25 18 6 25 4 22 28 5 8 5 13 12 MEAN QNH PRESSURE IN HPA 1013.5 1012.1 1011.4 1010.3 1009.5 1007.9 1005.4 1005.8 1009.5 1014.9 1017.3 1016.0 1011.1 MAX. QNH PRESSURE IN HPA 1025.9 1019.9 1019.5 1016.6 1014.6 1016.2 1012.7 1010.2 1014.2 1022.0 1026.6 1025.0 1026.6 DAY 8 11 26 30 16 1 12 18 30 28 5 4 MIN. QNH PRESSURE IN HPA 1000.5 1000.6 1001.4 1005.8 1005.0 1002.3 996.9 1000.7 1004.1 1006.7 1010.9 1004.5 996.9 DAY 25 18 6 25 4 22 28 5 8 5 13 12 MEAN QFF PRESSURE IN HPA 1017.9 1013.8 1011.5 1006.7 1002.2 997.9 993.7 994.7 1001.2 1010.6 1015.4 1017.6 1006.9 MAX. QFF PRESSURE IN HPA 1030.6 1023.9 1019.7 1013.1 1007.4 1009.1 1001.1 999.8 1007.9 1017.4 1026.2 1024.8 1030.6 DAY 8 23 19 14 31 1 12 18 30 28 26 25 MIN. QFF PRESSURE IN HPA 1002.5 1001.0 1001.2 1000.3 998.4 990.8 983.9 989.1 993.5 1000.0 1007.7 1003.8 983.9 DAY 24 18 6 25 12 22 28 5 8 4 13 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 886.7 885.0 884.5 883.2 882.3 880.8 878.5 878.9 882.5 887.6 889.5 888.7 884.0 MAX. QFE PRESSURE IN HPA 897.4 892.6 891.4 888.4 887.0 888.0 884.9 883.4 886.6 893.3 898.6 896.8 898.6 DAY 8 23 26 29 16 1 12 18 29 29 5 4 MIN. QFE PRESSURE IN HPA 875.4 875.3 876.0 879.0 878.6 876.0 870.4 874.0 877.2 880.0 883.5 878.1 870.4 DAY 25 18 6 23 3 21 28 5 8 4 12 12 MEAN QNH PRESSURE IN HPA 1015.4 1013.4 1012.8 1011.4 1010.4 1008.7 1006.2 1006.6 1010.7 1016.4 1018.5 1017.6 1012.3 MAX. QNH PRESSURE IN HPA 1027.3 1021.9 1020.6 1017.2 1015.7 1016.8 1013.3 1011.7 1015.2 1022.7 1028.6 1026.6 1028.6 DAY 8 23 26 29 16 1 12 18 29 29 5 4 MIN. QNH PRESSURE IN HPA 1002.7 1002.6 1003.4 1006.7 1006.3 1003.4 997.1 1001.2 1004.7 1007.9 1011.8 1005.7 997.1 DAY 25 18 6 23 3 21 28 5 8 4 12 12 MEAN QFF PRESSURE IN HPA 1019.4 1014.9 1012.7 1007.3 1002.9 998.5 994.4 995.3 1001.9 1011.3 1015.8 1018.9 1007.8 MAX. QFF PRESSURE IN HPA 1031.6 1026.5 1020.4 1013.0 1009.4 1009.1 1002.4 1001.0 1009.0 1017.3 1027.8 1026.4 1031.6 DAY 8 23 19 29 31 1 1 18 15 29 26 25 MIN. QFF PRESSURE IN HPA 1004.4 1003.6 1002.8 999.6 999.1 991.5 984.0 989.2 993.8 1000.2 1008.8 1005.4 984.0 DAY 24 18 6 23 12 21 28 5 8 4 12 12 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 885.8 884.2 883.7 882.5 881.6 880.2 877.7 878.1 881.9 886.7 888.6 887.6 883.2 MAX. QFE PRESSURE IN HPA 896.1 892.0 891.0 888.0 886.0 887.0 883.9 882.1 886.0 892.6 898.0 895.2 898.0 DAY 8 10 26 29 16 1 1 18 30 28 5 4 MIN. QFE PRESSURE IN HPA 873.1 875.4 874.4 877.4 878.0 875.6 870.0 873.4 876.8 879.0 882.6 877.3 870.0 DAY 24 18 6 25 3 21 28 5 8 4 12 12 MEAN QNH PRESSURE IN HPA 1014.3 1012.5 1012.0 1010.6 1009.6 1008.1 1005.3 1005.7 1010.0 1015.4 1017.5 1016.4 1011.4 MAX. QNH PRESSURE IN HPA 1025.8 1021.3 1020.1 1016.8 1014.6 1015.7 1012.2 1010.2 1014.6 1021.9 1027.9 1024.8 1027.9 DAY 8 10 26 29 16 1 1 18 30 28 5 4 MIN. QNH PRESSURE IN HPA 1000.2 1002.7 1001.6 1005.0 1005.6 1002.9 996.7 1000.5 1004.3 1006.7 1010.8 1004.8 996.7 DAY 24 18 6 25 3 21 28 5 8 4 12 12 MEAN QFF PRESSURE IN HPA ****** ****** 1011.3 1006.0 1001.8 997.6 993.3 994.0 1000.8 1009.9 1014.4 1017.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1019.5 1012.0 1007.4 1007.4 1001.6 999.1 1008.2 1016.2 1027.3 1024.4 ****** DAY ** ** 19 29 31 2 1 18 15 28 26 25 MIN. QFF PRESSURE IN HPA ****** ****** 1000.4 998.3 998.0 990.9 983.5 988.2 992.7 998.7 1007.6 1004.5 ****** DAY ** ** 6 23 12 21 28 5 8 4 12 12 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 884.8 882.5 882.0 881.2 880.2 878.7 876.3 876.5 880.2 885.3 887.2 886.6 881.8 MAX. QFE PRESSURE IN HPA 895.3 889.7 888.9 887.0 884.5 885.5 882.2 879.9 884.3 891.7 896.5 893.4 896.5 DAY 8 10 26 29 31 1 1 18 30 28 26 4 MIN. QFE PRESSURE IN HPA 870.0 873.2 873.0 876.0 876.0 873.8 869.0 872.8 874.8 877.0 880.9 878.0 869.0 DAY 24 17 6 23 3 22 28 5 8 4 12 12 MEAN QNH PRESSURE IN HPA 1013.2 1010.7 1010.1 1009.2 1008.1 1006.5 1003.7 1004.0 1008.1 1013.8 1015.9 1015.2 1009.9 MAX. QNH PRESSURE IN HPA 1024.9 1018.7 1017.8 1015.7 1012.9 1014.0 1010.3 1007.7 1012.7 1020.9 1026.3 1022.8 1026.3 DAY 8 10 26 29 31 1 1 18 30 28 26 4 MIN. QNH PRESSURE IN HPA 996.7 1000.3 1000.0 1003.4 1003.4 1000.9 995.6 999.8 1002.1 1004.5 1008.9 1005.6 995.6 DAY 24 17 6 23 3 22 28 5 8 4 12 12 MEAN QFF PRESSURE IN HPA ****** ****** 1009.3 1004.7 1000.6 996.0 991.7 992.2 998.9 1008.4 1012.9 1016.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1017.2 1010.6 1006.0 1006.7 999.3 996.6 1006.2 1015.4 1026.3 1023.5 ****** DAY ** ** 19 29 31 1 1 18 15 28 26 25 MIN. QFF PRESSURE IN HPA ****** ****** 998.5 995.8 997.2 989.2 982.3 987.7 990.1 996.7 1005.3 1004.9 ****** DAY ** ** 6 23 12 21 28 5 8 4 12 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1983 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 885.2 883.1 882.2 881.1 880.1 878.2 875.7 876.0 880.1 885.4 887.5 887.1 881.8 MAX. QFE PRESSURE IN HPA 895.7 890.4 889.0 886.8 885.0 887.2 881.7 880.0 884.8 892.1 895.5 893.0 895.7 DAY 8 10 26 29 31 1 1 31 30 28 26 4 MIN. QFE PRESSURE IN HPA 868.9 871.8 873.2 876.0 876.0 873.2 868.8 872.0 874.8 876.4 881.2 879.2 868.8 DAY 24 17 5 23 3 21 28 5 8 4 12 12 MEAN QNH PRESSURE IN HPA 1013.7 1011.3 1010.3 1009.1 1007.9 1005.8 1003.0 1003.4 1008.0 1013.9 1016.3 1015.8 1009.9 MAX. QNH PRESSURE IN HPA 1025.4 1019.5 1017.9 1015.4 1013.4 1015.9 1009.8 1007.9 1013.2 1021.4 1025.2 1022.4 1025.4 DAY 8 10 26 29 31 1 1 31 30 28 26 4 MIN. QNH PRESSURE IN HPA 995.5 998.7 1000.3 1003.4 1003.4 1000.3 995.4 998.9 1002.1 1003.8 1009.2 1007.0 995.4 DAY 24 17 5 23 3 21 28 5 8 4 12 12 MEAN QFF PRESSURE IN HPA 1018.1 1013.0 1010.3 1005.3 1000.7 995.6 991.2 992.2 999.6 1009.6 1014.4 1017.4 1005.6 MAX. QFF PRESSURE IN HPA 1030.4 1023.0 1018.4 1011.2 1007.2 1009.8 998.9 997.4 1006.7 1016.7 1025.8 1024.6 1030.4 DAY 8 23 19 29 31 1 1 31 15 28 26 25 MIN. QFF PRESSURE IN HPA 996.2 998.4 999.1 996.8 996.5 988.6 982.5 987.4 991.1 997.1 1006.7 1006.7 982.5 DAY 24 17 5 23 11 21 28 4 8 4 12 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 885.8 883.7 882.7 881.9 881.1 879.1 876.7 877.2 881.1 886.3 888.2 887.6 882.6 MAX. QFE PRESSURE IN HPA 896.6 890.9 889.8 888.2 887.2 886.3 883.3 881.2 886.2 892.3 895.2 893.8 896.6 DAY 8 10 26 29 18 1 11 17 30 28 26 3 MIN. QFE PRESSURE IN HPA 869.0 872.5 872.0 877.0 876.6 874.0 869.6 872.6 875.6 877.6 882.2 880.4 869.0 DAY 24 17 5 23 3 21 27 4 8 4 12 12 MEAN QNH PRESSURE IN HPA 1014.3 1012.0 1010.9 1010.0 1009.1 1006.8 1004.1 1004.7 1009.1 1014.8 1017.0 1016.4 1010.8 MAX. QNH PRESSURE IN HPA 1026.4 1020.0 1018.8 1017.0 1015.9 1014.9 1011.5 1009.2 1014.8 1021.6 1024.8 1023.3 1026.4 DAY 8 10 26 29 18 1 11 17 30 28 26 3 MIN. QNH PRESSURE IN HPA 995.6 999.5 998.9 1004.5 1004.1 1001.2 996.2 999.6 1002.9 1005.2 1010.3 1008.3 995.6 DAY 24 17 5 23 3 21 27 4 8 4 12 12 MEAN QFF PRESSURE IN HPA 1018.3 1013.5 1010.7 1005.7 1001.6 996.6 992.3 993.4 1000.4 1009.9 1014.4 1017.8 1006.2 MAX. QFF PRESSURE IN HPA 1030.8 1023.1 1018.8 1012.2 1008.1 1007.3 1000.9 998.0 1007.8 1016.1 1025.2 1025.3 1030.8 DAY 8 23 19 29 31 1 1 31 30 28 26 25 MIN. QFF PRESSURE IN HPA 997.1 999.5 996.5 997.9 997.4 989.4 983.4 987.9 992.2 997.3 1007.0 1007.7 983.4 DAY 24 17 5 23 11 21 27 4 8 4 12 11 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** 881.0 882.7 882.3 881.3 879.4 877.0 877.6 881.2 886.2 888.2 887.5 ****** MAX. QFE PRESSURE IN HPA ****** 889.9 889.4 888.6 888.6 886.0 884.2 881.2 886.9 892.3 894.7 894.3 ****** DAY ** 23 25 29 18 1 11 17 30 28 5 3 MIN. QFE PRESSURE IN HPA ****** 872.0 872.0 877.9 877.0 874.4 870.0 873.0 876.1 878.0 882.6 879.0 ****** DAY ** 17 5 23 3 28 27 4 8 4 12 11 MEAN QNH PRESSURE IN HPA ****** 1008.9 1010.9 1010.4 1009.4 1007.2 1004.6 1005.1 1009.2 1014.8 1017.0 1016.2 ****** MAX. QNH PRESSURE IN HPA ****** 1018.9 1018.4 1017.5 1017.5 1014.6 1012.5 1009.2 1015.6 1021.6 1024.3 1023.8 ****** DAY ** 23 25 29 18 1 11 17 30 28 5 3 MIN. QNH PRESSURE IN HPA ****** 998.9 998.9 1005.5 1004.5 1001.6 996.7 1000.0 1003.5 1005.6 1010.8 1006.7 ****** DAY ** 17 5 23 3 28 27 4 8 4 12 11 MEAN QFF PRESSURE IN HPA ****** 1009.6 1010.2 1005.8 1001.6 996.8 992.5 993.5 1000.2 1009.4 1014.0 1017.1 ****** MAX. QFF PRESSURE IN HPA ****** 1022.6 1018.5 1012.0 1008.8 1007.0 1000.7 998.0 1008.2 1015.8 1024.7 1023.8 ****** DAY ** 23 19 29 18 2 11 31 30 28 26 25 MIN. QFF PRESSURE IN HPA ****** 999.2 996.3 998.8 996.8 990.1 983.7 988.1 992.0 997.4 1007.2 1005.7 ****** DAY ** 17 5 23 29 21 27 4 8 4 12 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.0 2.8 11.8 18.2 20.0 28.9 31.2 32.1 25.9 17.1 11.5 1.6 17.1 MINIMUN AIR TEMPERATURE (C) 0.2 -1.4 7.1 12.2 14.5 23.2 25.3 26.9 20.4 11.9 7.7 -1.2 12.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 25 31 31 12 0 0 0 99 DAYS WITH MINIMUM TEMP. <=-4 2 8 0 0 0 0 0 0 0 0 0 5 15 DAYS WITH FREEZING MIN.<= 0 18 21 1 0 0 0 0 0 0 0 0 24 64 TEMPERATURE RECORDS LOWEST(C) -6.4 -6.6 0.0 4.8 7.0 18.0 22.4 24.0 16.0 3.8 3.2 -5.0 -6.6 DAY 31 19 17 5 2 1 20 12 30 21 16 22 MAXIMUM AIR TEMPERATURE (C) 9.4 7.8 17.3 24.3 25.6 34.8 36.9 37.5 31.4 22.7 15.9 5.2 22.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 5 27 31 31 18 0 0 0 112 DAYS WITH MAXIMUM TEMP. <= 0 0 2 0 0 0 0 0 0 0 0 0 0 2 TEMPERATURE RECORDS HIGHEST(C) 14.4 16.4 23.0 29.4 33.0 38.6 39.0 41.0 37.4 27.5 23.0 9.0 41.0 DAY 28 13 8 21 29 11 10 16 3 5 3 14 DIF. BETWEEN (MAX.-MIN.) (C) 9.2 9.2 10.2 12.1 11.1 11.6 11.6 10.6 11.0 10.8 8.2 6.4 10.2 MEAN DAILY TEMP. (MDT) (C) 4.8 3.2 12.2 18.2 20.0 29.0 31.1 32.2 25.9 17.3 11.8 2.0 17.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 7.8 28.9 239.6 314.2 347.3 146.5 1.9 0.0 0.0 1086.4 HEATING DEG. DAYS(BASE 18 0C) 409.6 429.8 181.1 32.5 13.5 0.0 0.0 0.0 0.0 58.0 186.5 496.5 1807.6 DEWPOINT (MEAN C) -3.2 -5.8 1.1 1.5 3.7 7.6 6.4 7.9 5.5 -0.7 2.9 -4.1 1.9 MIXING RATIO (G/KG) 3.48 2.99 4.88 5.02 5.91 7.55 7.02 7.83 6.70 4.22 5.37 3.24 5.35 VAPOUR PRESSURE (HPA) 4.93 4.24 6.85 7.05 8.27 10.54 9.80 10.89 9.40 5.97 7.59 4.61 7.51 SATURATION DEF. (HPA) 3.43 3.59 7.44 14.68 15.90 30.60 36.46 37.94 24.96 14.35 6.36 2.36 16.51 RELATIVE HUMIDITY (MEAN %) 62 56 50 35 38 28 22 23 28 31 59 67 42 RELATIVE HUMIDITY (MAX. %) 77 71 65 51 57 37 30 31 39 41 72 80 54 RELATIVE HUMIDITY (MIN. %) 44 42 36 23 24 20 15 17 21 23 45 54 30 RELATIVE HUMIDITY (MEAN% 03UTC) 69 63 60 45 48 35 28 29 37 39 65 72 49 RELATIVE HUMIDITY (MEAN% 09UTC) 51 50 44 28 29 22 18 20 24 25 50 59 35 RELATIVE HUMIDITY (MEAN% 15UTC) 61 54 43 29 32 22 18 20 24 29 56 65 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 10.2 5.2 32.4 16.4 38.2 3.0 0.0 0.0 0.1 2.0 16.0 12.9 136.4 DAYS WITH PRECIPITATION >=10 0 0 1 0 1 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 1 0 5 2 3 0 0 0 0 0 1 1 13 DAYS WITH PRECIPITATION >= 1 2 2 5 3 8 1 0 0 0 1 5 5 32 DAYS WITH PRECIPITATION 5 2 7 5 10 2 0 0 1 1 9 8 50 GREATEST DAILY PRECIPITATION 8.0 2.6 10.0 9.0 13.0 3.0 0.0 0.0 0.1 2.0 6.2 5.0 13.0 DAY 29 5 16 17 10 7 ** ** 10 20 15 25 DAY WITH THUNDER STORM 0 0 1 2 7 2 0 0 0 1 0 0 13 DAYS WITH SNOW OR SLEET 2 2 1 0 0 0 0 0 0 0 0 3 8 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 1 0 0 1 WIND DIRECTION (PREVAILING) 360 360 360 360 360 45 360 360 360 360 360 315 360 PREVAILING WIND SPEED(KNOTS) 8.2 6.5 6.7 7.4 10.5 8.3 9.5 8.3 7.1 6.9 5.7 4.5 8.0 PREVAILING WIND PERCENT 9.3 9.5 7.7 10.8 10.5 10.0 16.5 14.1 10.0 15.3 8.3 3.2 10.4 CALMS PERCENT OF WIND 87.9 81.9 77.0 66.3 63.3 64.6 49.6 57.7 71.3 72.6 85.0 93.5 72.5 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 357 328 307 297 319 30 29 36 331 335 318 329 350 VECTOR WIND MAGNITUDE(KNOTS) 0.8 0.6 0.7 1.6 1.5 1.5 2.8 1.7 1.2 1.4 0.7 0.2 1.0 WIND STEADINESES (MEAN %) 80.0 54.5 43.8 57.1 44.1 50.0 70.0 53.1 63.2 73.7 70.0 66.7 47.6 WIND SPEED (MEAN KNOTS) 1.0 1.1 1.6 2.8 3.4 3.0 4.0 3.2 1.9 1.9 1.0 0.3 2.1 FASTEST WIND DIRECTION 360 360 360 280 320 350 360 360 20 340 300 330 360 FASTEST WIND SPEED (KNOTS) 23 23 19 23 23 23 17 17 14 19 16 8 23 DAY 29 14 9 12 21 6 7 11 10 7 13 16 DAYS WITH SKY CLEAR (0-2)/8 18 14 9 19 15 28 27 30 30 25 14 15 244 DAYS WITH P.CLOUDY (3-6)/8 10 11 14 8 13 2 4 1 0 6 7 4 80 DAYS WITH CLOUDY (7-8)/8 3 4 8 3 3 0 0 0 0 0 9 12 42 DAYS WITH VISIBILITY =< 2 KM 1 1 0 0 0 0 0 0 0 1 2 0 5 DURATION OF SUNSHINE HOURS 182.7 176.7 168.8 244.3 243.9 338.5 343.2 331.3 304.7 241.8 139.7 114.3 2829.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 885.2 887.8 881.7 880.5 880.0 878.5 878.5 876.6 883.0 887.2 886.1 888.7 882.8 MAX. QFE PRESSURE IN HPA 894.5 896.1 890.0 888.4 886.6 884.0 883.0 880.7 888.4 896.0 895.9 896.0 896.1 DAY-HOUR 4-21 19- 6 29- 6 14- 6 12- 9 29- 6 22- 6 30- 6 26- 6 22- 6 27- 6 18-18 MIN. QFE PRESSURE IN HPA 876.1 876.0 870.0 874.5 870.5 871.2 874.2 872.1 876.0 876.3 876.8 879.0 870.0 DAY-HOUR 29-12 8-15 12-18 12- 0 29-15 21- 0 15-15 15-15 8-15 19-12 12-12 7-12 MEAN QNH PRESSURE IN HPA 1013.7 1016.6 1009.7 1008.4 1007.9 1006.2 1006.2 1004.1 1011.2 1015.9 1014.6 1017.5 1011.0 MAX. QNH PRESSURE IN HPA 1024.0 1025.8 1019.0 1017.2 1015.2 1012.3 1011.2 1008.6 1017.2 1025.7 1025.6 1025.7 1025.8 DAY-HOUR 4-21 19- 6 29- 6 14- 6 12- 9 29- 6 22- 6 30- 6 26- 6 22- 6 27- 6 18-18 MIN. QNH PRESSURE IN HPA 1003.5 1003.4 996.7 1001.7 997.3 998.0 1001.4 999.0 1003.4 1003.7 1004.3 1006.7 996.7 DAY-HOUR 29-12 8-15 12-18 12- 0 29-15 21- 0 15-15 15-15 8-15 19-12 12-12 7-12 MEAN QFF PRESSURE IN HPA 1015.3 1019.0 1007.4 1003.2 1001.8 996.1 995.2 992.7 1002.6 1011.3 1012.5 1020.5 1006.5 MAX. QFF PRESSURE IN HPA 1025.4 1030.3 1017.5 1012.6 1011.2 1002.8 1001.2 998.4 1010.1 1024.7 1023.5 1028.6 1030.3 DAY-HOUR 5- 3 19- 6 1- 6 14- 6 13-15 29- 6 22- 6 30- 6 26- 6 21- 6 27- 6 18-15 MIN. QFF PRESSURE IN HPA 1004.5 1003.8 993.6 994.9 988.5 987.0 989.7 986.7 994.1 997.5 1000.2 1008.4 986.7 DAY-HOUR 29- 0 14- 0 12-18 10-12 29-15 21-15 16-12 15-12 1- 0 19-12 12-12 14-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 885.0 887.5 881.4 880.4 879.9 878.3 878.5 876.6 882.7 887.0 885.7 888.5 882.6 MAX. QFE PRESSURE IN HPA 893.8 895.0 889.0 886.2 885.2 883.3 881.6 878.9 886.8 895.0 892.0 895.5 895.5 DAY 5 19 29 14 13 29 23 1 26 22 27 19 MIN. QFE PRESSURE IN HPA 878.0 878.3 871.4 874.5 872.1 871.2 874.8 873.6 877.0 876.4 878.6 880.6 871.2 DAY 29 9 15 12 30 21 16 26 1 18 12 7 MEAN QNH PRESSURE IN HPA 1013.5 1016.2 1009.4 1008.3 1007.7 1005.9 1006.2 1004.1 1010.9 1015.7 1014.2 1017.4 1010.8 MAX. QNH PRESSURE IN HPA 1023.3 1024.6 1017.9 1014.8 1013.7 1011.5 1009.6 1006.6 1015.4 1024.6 1021.3 1025.2 1025.2 DAY 5 19 29 14 13 29 23 1 26 22 27 19 MIN. QNH PRESSURE IN HPA 1005.6 1006.0 998.3 1001.7 999.0 998.0 1002.1 1000.7 1004.5 1003.8 1006.3 1008.5 998.0 DAY 29 9 15 12 30 21 16 26 1 18 12 7 MEAN QFF PRESSURE IN HPA 1014.7 1018.4 1006.8 1002.9 1001.5 995.9 995.2 992.4 1002.0 1010.9 1011.8 1020.1 1006.0 MAX. QFF PRESSURE IN HPA 1023.7 1028.6 1014.9 1012.1 1009.5 1001.1 1000.0 995.3 1008.1 1023.4 1018.3 1027.4 1028.6 DAY 5 19 29 5 13 29 22 30 26 22 27 19 MIN. QFF PRESSURE IN HPA 1004.5 1003.8 995.7 994.9 990.2 987.0 990.6 988.3 994.1 997.6 1002.5 1009.8 987.0 DAY 29 14 13 10 30 21 16 16 1 18 12 7 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 885.0 887.9 881.9 881.0 880.4 879.2 879.3 877.3 883.3 887.3 886.0 888.6 883.1 MAX. QFE PRESSURE IN HPA 893.8 895.4 889.0 887.0 885.4 883.3 882.5 879.9 887.3 895.0 894.2 895.1 895.4 DAY 5 19 29 14 13 29 4 30 26 22 27 19 MIN. QFE PRESSURE IN HPA 876.8 878.4 871.6 875.6 873.2 872.1 875.6 874.2 878.1 877.0 878.0 879.6 871.6 DAY 29 8 15 10 29 21 16 26 9 18 12 7 MEAN QNH PRESSURE IN HPA 1013.5 1016.6 1009.9 1008.9 1008.3 1007.0 1007.1 1004.8 1011.5 1016.0 1014.6 1017.5 1011.3 MAX. QNH PRESSURE IN HPA 1023.3 1025.0 1017.9 1015.7 1013.9 1011.5 1010.6 1007.7 1016.0 1024.6 1023.7 1024.7 1025.0 DAY 5 19 29 14 13 29 4 30 26 22 27 19 MIN. QNH PRESSURE IN HPA 1004.3 1006.1 998.5 1002.9 1000.3 999.0 1002.9 1001.4 1005.7 1004.5 1005.6 1007.4 998.5 DAY 29 8 15 10 29 21 16 26 9 18 12 7 MEAN QFF PRESSURE IN HPA 1015.6 1019.7 1008.1 1004.2 1002.6 997.2 996.5 993.7 1003.2 1012.1 1012.9 1020.8 1007.2 MAX. QFF PRESSURE IN HPA 1025.4 1030.2 1015.9 1011.9 1010.4 1001.6 1001.2 997.3 1009.3 1024.3 1022.2 1028.2 1030.2 DAY 5 19 4 5 13 4 4 30 26 22 27 19 MIN. QFF PRESSURE IN HPA 1004.7 1005.5 997.0 996.7 991.9 988.0 991.8 988.9 995.8 998.9 1002.5 1009.2 988.0 DAY 17 14 15 10 29 21 16 16 1 18 12 7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 886.5 889.2 883.0 881.9 881.3 879.9 879.9 878.0 884.4 888.3 887.3 889.8 884.1 MAX. QFE PRESSURE IN HPA 894.1 896.1 890.0 888.4 886.1 884.0 883.0 880.7 888.4 896.0 895.9 895.6 896.1 DAY 5 19 29 14 13 29 22 30 26 22 27 18 MIN. QFE PRESSURE IN HPA 877.4 879.2 872.1 876.7 873.5 873.3 876.7 874.8 879.2 877.7 878.6 880.8 872.1 DAY 29 8 15 12 29 21 16 15 9 18 12 7 MEAN QNH PRESSURE IN HPA 1015.1 1018.1 1011.2 1010.0 1009.3 1007.8 1007.7 1005.6 1012.8 1017.1 1016.0 1018.7 1012.5 MAX. QNH PRESSURE IN HPA 1023.6 1025.8 1019.0 1017.2 1014.7 1012.3 1011.2 1008.6 1017.2 1025.7 1025.6 1025.3 1025.8 DAY 5 19 29 14 13 29 22 30 26 22 27 18 MIN. QNH PRESSURE IN HPA 1005.0 1007.0 999.0 1004.2 1000.6 1000.4 1004.2 1002.1 1007.0 1005.3 1006.3 1008.7 999.0 DAY 29 8 15 12 29 21 16 15 9 18 12 7 MEAN QFF PRESSURE IN HPA 1017.1 1020.8 1009.1 1004.9 1003.3 997.9 996.8 994.3 1004.1 1012.6 1014.0 1021.9 1008.1 MAX. QFF PRESSURE IN HPA 1025.2 1030.3 1017.5 1012.6 1010.2 1002.8 1001.2 998.4 1010.1 1024.7 1023.5 1028.3 1030.3 DAY 5 19 1 14 13 29 22 30 26 21 27 18 MIN. QFF PRESSURE IN HPA 1006.4 1006.7 997.2 997.6 991.9 989.2 992.8 989.8 997.3 999.2 1003.2 1010.7 989.2 DAY 29 14 15 10 29 21 16 15 1 18 12 7 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 885.5 888.5 882.4 881.2 880.6 879.1 878.9 877.2 883.6 887.6 886.4 888.9 883.3 MAX. QFE PRESSURE IN HPA 894.0 895.6 889.6 887.8 886.6 882.6 881.9 879.9 887.6 895.2 894.5 895.2 895.6 DAY 4 18 28 14 12 4 22 30 26 21 27 18 MIN. QFE PRESSURE IN HPA 876.2 878.2 872.5 875.6 873.0 872.9 875.9 874.0 878.3 877.0 877.7 879.3 872.5 DAY 29 8 15 10 29 21 16 8 8 18 12 7 MEAN QNH PRESSURE IN HPA 1014.0 1017.3 1010.5 1009.2 1008.5 1006.9 1006.6 1004.7 1011.9 1016.3 1015.0 1017.8 1011.6 MAX. QNH PRESSURE IN HPA 1023.5 1025.3 1018.6 1016.6 1015.2 1010.8 1010.0 1007.7 1016.3 1024.8 1024.0 1024.8 1025.3 DAY 4 18 28 14 12 4 22 30 26 21 27 18 MIN. QNH PRESSURE IN HPA 1003.6 1005.8 999.5 1002.9 1000.0 999.9 1003.3 1001.2 1006.0 1004.5 1005.3 1007.1 999.5 DAY 29 8 15 10 29 21 16 8 8 18 12 7 MEAN QFF PRESSURE IN HPA 1015.3 1019.4 1008.1 1003.7 1002.2 996.7 995.4 993.1 1002.9 1011.4 1012.5 1020.5 1006.8 MAX. QFF PRESSURE IN HPA 1024.3 1028.8 1016.4 1011.6 1010.5 1001.0 999.8 996.9 1009.2 1023.6 1021.3 1027.0 1028.8 DAY 4 18 28 14 12 4 22 30 26 21 27 18 MIN. QFF PRESSURE IN HPA 1006.4 1007.2 997.6 995.4 990.3 988.6 991.6 988.5 996.1 997.8 1001.3 1008.7 988.5 DAY 29 14 15 10 29 21 16 16 1 18 12 7 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 884.3 886.9 880.7 879.5 879.1 877.6 877.5 875.6 882.1 886.3 885.3 887.8 881.9 MAX. QFE PRESSURE IN HPA 892.6 894.0 888.0 885.0 884.9 881.4 880.8 878.0 886.1 894.2 893.1 894.5 894.5 DAY 4 18 28 14 17 4 21 30 26 21 27 18 MIN. QFE PRESSURE IN HPA 876.1 876.3 871.2 874.7 871.2 871.9 874.2 872.4 876.4 876.3 876.8 879.0 871.2 DAY 29 8 15 10 29 21 16 15 8 19 12 7 MEAN QNH PRESSURE IN HPA 1012.7 1015.5 1008.7 1007.3 1006.8 1005.1 1005.1 1003.0 1010.2 1014.9 1013.7 1016.6 1010.0 MAX. QNH PRESSURE IN HPA 1021.9 1023.5 1016.8 1013.4 1013.3 1009.4 1008.7 1005.6 1014.7 1023.7 1022.5 1024.0 1024.0 DAY 4 18 28 14 17 4 21 30 26 21 27 18 MIN. QNH PRESSURE IN HPA 1003.5 1003.7 998.0 1001.9 998.0 998.8 1001.4 999.4 1003.8 1003.7 1004.3 1006.7 998.0 DAY 29 8 15 10 29 21 16 15 8 19 12 7 MEAN QFF PRESSURE IN HPA 1013.9 1017.5 1006.0 1001.8 1000.6 994.9 994.0 991.3 1001.4 1010.1 1011.4 1019.3 1005.2 MAX. QFF PRESSURE IN HPA 1022.7 1026.7 1014.2 1009.4 1008.7 999.5 999.0 994.6 1007.4 1022.6 1020.0 1026.5 1026.7 DAY 4 18 28 13 12 4 21 30 26 21 27 18 MIN. QFF PRESSURE IN HPA 1006.0 1005.5 995.8 994.9 988.6 987.2 989.7 986.7 995.0 997.5 1000.2 1008.4 986.7 DAY 29 14 12 10 29 21 16 15 9 19 12 14 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 884.7 887.2 880.8 879.4 878.9 877.2 877.1 875.3 881.9 886.6 885.7 888.4 881.9 MAX. QFE PRESSURE IN HPA 892.9 894.3 887.8 884.8 885.9 880.9 880.5 877.6 885.9 894.4 893.1 895.4 895.4 DAY 4 18 28 14 13 4 3 30 26 21 27 18 MIN. QFE PRESSURE IN HPA 877.7 876.0 871.0 874.7 870.5 871.6 874.2 872.1 876.0 877.2 878.0 879.9 870.5 DAY 29 8 12 25 29 21 15 15 8 17 12 14 MEAN QNH PRESSURE IN HPA 1013.1 1015.9 1008.8 1007.1 1006.6 1004.7 1004.6 1002.6 1010.0 1015.2 1014.3 1017.2 1010.0 MAX. QNH PRESSURE IN HPA 1022.3 1023.8 1016.6 1013.2 1014.4 1008.9 1008.4 1005.2 1014.4 1023.9 1022.5 1025.0 1025.0 DAY 4 18 28 14 13 4 3 30 26 21 27 18 MIN. QNH PRESSURE IN HPA 1005.3 1003.4 997.8 1001.9 997.3 998.5 1001.4 999.0 1003.4 1004.7 1005.6 1007.7 997.3 DAY 29 8 12 25 29 21 15 15 8 17 12 14 MEAN QFF PRESSURE IN HPA 1015.2 1018.8 1006.9 1002.3 1000.9 994.8 993.9 991.4 1001.7 1011.2 1012.6 1020.5 1005.8 MAX. QFF PRESSURE IN HPA 1024.1 1028.2 1015.0 1009.0 1011.2 1000.2 998.5 994.7 1008.0 1023.8 1021.1 1028.6 1028.6 DAY 4 18 28 13 13 1 21 30 26 21 27 18 MIN. QFF PRESSURE IN HPA 1008.6 1006.4 994.1 996.0 988.5 987.0 990.3 986.7 994.9 998.4 1003.1 1009.9 986.7 DAY 29 8 12 25 29 21 15 15 8 17 12 14 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 885.4 887.9 881.7 880.4 880.1 878.3 878.3 876.5 883.0 887.3 886.2 888.9 882.8 MAX. QFE PRESSURE IN HPA 894.3 895.3 889.4 885.4 886.2 882.9 882.4 878.7 887.0 895.2 893.1 896.0 896.0 DAY 4 18 28 13 12 28 22 3 30 21 27 18 MIN. QFE PRESSURE IN HPA 880.1 877.7 870.0 875.3 871.6 872.0 875.1 873.4 877.4 877.8 878.1 881.5 870.0 DAY 28 8 12 25 29 20 15 15 8 17 13 14 MEAN QNH PRESSURE IN HPA 1013.9 1016.7 1009.7 1008.3 1008.0 1006.0 1006.0 1003.9 1011.2 1016.0 1014.8 1017.8 1011.0 MAX. QNH PRESSURE IN HPA 1023.8 1024.9 1018.4 1013.9 1014.8 1011.1 1010.5 1006.4 1015.7 1024.8 1022.5 1025.7 1025.7 DAY 4 18 28 13 12 28 22 3 30 21 27 18 MIN. QNH PRESSURE IN HPA 1008.0 1005.3 996.7 1002.6 998.5 998.9 1002.4 1000.5 1005.0 1005.4 1005.7 1009.5 996.7 DAY 28 8 12 25 29 20 15 15 8 17 13 14 MEAN QFF PRESSURE IN HPA 1015.9 1019.3 1007.5 1003.1 1001.9 996.0 995.1 992.7 1002.7 1011.6 1012.9 1021.0 1006.6 MAX. QFF PRESSURE IN HPA 1025.1 1029.5 1016.2 1010.6 1010.0 1001.4 1000.2 995.3 1008.8 1024.3 1020.6 1028.5 1029.5 DAY 4 18 28 4 12 28 22 3 26 21 27 18 MIN. QFF PRESSURE IN HPA 1007.3 1008.3 993.6 996.5 989.4 987.7 990.9 988.2 996.0 998.6 1003.6 1011.1 987.7 DAY 28 13 12 25 29 21 15 15 8 17 13 14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 885.2 887.8 881.7 880.4 880.2 878.5 878.6 876.7 883.3 887.3 886.0 888.6 882.8 MAX. QFE PRESSURE IN HPA 894.5 895.3 889.0 886.2 886.2 883.6 882.0 878.7 887.1 895.2 892.2 895.8 895.8 DAY 4 18 28 13 12 28 22 21 22 21 27 18 MIN. QFE PRESSURE IN HPA 879.8 877.3 871.7 875.0 871.8 871.5 875.4 873.6 877.6 876.8 878.1 881.8 871.5 DAY 16 8 12 11 29 20 15 15 8 17 13 6 MEAN QNH PRESSURE IN HPA 1013.6 1016.6 1009.7 1008.3 1008.0 1006.1 1006.3 1004.2 1011.5 1016.0 1014.5 1017.4 1011.0 MAX. QNH PRESSURE IN HPA 1024.0 1024.9 1017.9 1014.8 1014.8 1011.9 1010.1 1006.4 1015.8 1024.8 1021.5 1025.5 1025.5 DAY 4 18 28 13 12 28 22 21 22 21 27 18 MIN. QNH PRESSURE IN HPA 1007.6 1004.8 998.6 1002.3 998.7 998.4 1002.7 1000.7 1005.2 1004.3 1005.7 1009.9 998.4 DAY 16 8 12 11 29 20 15 15 8 17 13 6 MEAN QFF PRESSURE IN HPA 1014.9 1018.6 1007.2 1002.8 1001.7 995.9 995.2 992.6 1002.7 1011.2 1012.2 1020.2 1006.3 MAX. QFF PRESSURE IN HPA 1024.5 1028.7 1015.3 1011.6 1010.4 1001.5 999.8 995.0 1008.5 1023.8 1019.4 1027.3 1028.7 DAY 4 18 28 4 12 28 22 30 26 21 30 18 MIN. QFF PRESSURE IN HPA 1007.0 1007.3 995.7 995.9 989.5 987.6 991.0 988.1 996.1 997.8 1002.8 1011.2 987.6 DAY 16 13 12 11 29 20 15 15 8 17 13 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.1 5.8 8.7 18.9 24.0 30.4 32.3 27.4 26.8 18.2 12.7 6.2 17.9 MINIMUN AIR TEMPERATURE (C) 0.2 1.3 3.9 13.2 18.1 25.3 27.1 22.2 21.3 13.3 8.9 2.6 13.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 1 5 28 31 23 18 0 0 0 106 DAYS WITH MINIMUM TEMP. <=-4 5 2 4 0 0 0 0 0 0 0 0 0 11 DAYS WITH FREEZING MIN.<= 0 15 10 13 0 0 0 0 0 0 0 0 7 45 TEMPERATURE RECORDS LOWEST(C) -5.0 -6.8 -6.6 8.0 13.8 19.8 21.2 15.6 18.0 8.0 4.0 -1.8 -6.8 DAY 8 7 11 7 5 10 30 28 22 30 30 31 MAXIMUM AIR TEMPERATURE (C) 6.7 11.4 13.9 24.9 29.9 36.1 37.9 33.0 32.8 23.9 17.5 11.0 23.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 15 28 31 27 27 1 0 0 132 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 13.0 19.6 24.6 31.5 36.4 40.4 40.4 36.8 36.4 33.2 22.5 18.6 40.4 DAY 30 15 21 21 31 27 6 23 3 1 9 2 DIF. BETWEEN (MAX.-MIN.) (C) 6.5 10.1 10.0 11.7 11.8 10.8 10.8 10.8 11.5 10.6 8.6 8.4 10.1 MEAN DAILY TEMP. (MDT) (C) 3.5 6.3 8.9 19.0 24.0 30.7 32.5 27.6 27.0 18.6 13.2 6.8 18.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 20.8 94.6 290.3 356.8 205.7 181.2 9.6 0.0 0.0 1159.1 HEATING DEG. DAYS(BASE 18 0C) 450.9 326.2 283.2 25.2 0.0 0.0 0.0 0.0 0.0 27.7 145.3 345.8 1604.3 DEWPOINT (MEAN C) -1.1 -5.1 -3.6 3.6 5.5 6.6 9.2 9.8 5.4 2.6 2.9 -1.6 2.9 MIXING RATIO (G/KG) 4.15 3.16 3.53 5.76 6.72 7.43 8.63 8.84 6.54 5.33 5.41 3.96 5.79 VAPOUR PRESSURE (HPA) 5.86 4.44 4.98 8.08 9.41 10.34 11.99 12.35 9.18 7.52 7.65 5.60 8.12 SATURATION DEF. (HPA) 2.05 5.20 7.57 14.74 21.49 34.48 37.34 25.21 26.95 14.06 7.50 4.15 16.73 RELATIVE HUMIDITY (MEAN %) 75 48 45 38 32 24 26 35 27 37 53 59 42 RELATIVE HUMIDITY (MAX. %) 85 63 58 50 41 33 35 45 35 46 62 71 52 RELATIVE HUMIDITY (MIN. %) 61 32 33 28 24 17 19 26 19 27 43 47 31 RELATIVE HUMIDITY (MEAN% 03UTC) 79 58 53 47 40 28 32 44 34 44 59 67 49 RELATIVE HUMIDITY (MEAN% 09UTC) 68 40 41 31 27 20 22 29 22 31 46 52 36 RELATIVE HUMIDITY (MEAN% 15UTC) 75 40 39 33 27 21 21 33 23 34 52 59 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 47.5 24.6 2.6 7.2 0.6 2.0 0.0 21.0 0.0 1.1 3.0 4.5 114.1 DAYS WITH PRECIPITATION >=10 1 1 0 0 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 4 2 0 0 0 0 0 2 0 0 0 0 8 DAYS WITH PRECIPITATION >= 1 9 3 2 3 0 1 0 4 0 0 2 2 26 DAYS WITH PRECIPITATION 9 5 7 3 1 1 0 4 0 3 4 4 41 GREATEST DAILY PRECIPITATION 13.0 15.0 1.0 4.2 0.6 2.0 0.0 8.6 0.0 0.8 2.0 2.4 15.0 DAY 2 2 8 6 20 10 ** 28 ** 12 13 19 DAY WITH THUNDER STORM 0 0 0 2 0 1 0 4 0 1 0 0 8 DAYS WITH SNOW OR SLEET 3 1 3 0 0 0 0 0 0 0 0 1 8 DAYS WITH DUST 0 2 1 0 0 0 0 2 0 0 0 0 5 WIND DIRECTION (PREVAILING) 360 360 360 360 360 360 45 360 360 360 360 360 360 PREVAILING WIND SPEED(KNOTS) 4.7 5.6 6.4 6.0 7.4 8.6 7.6 7.8 6.2 7.2 5.3 4.8 6.8 PREVAILING WIND PERCENT 4.4 6.3 10.5 10.4 12.9 12.9 6.9 14.9 17.9 15.7 10.0 7.7 10.9 CALMS PERCENT OF WIND 93.1 77.2 70.6 65.8 67.3 62.5 66.5 57.7 64.2 66.9 82.9 85.9 71.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 329 285 308 292 329 22 77 12 338 341 330 317 342 VECTOR WIND MAGNITUDE(KNOTS) 0.2 1.1 1.0 0.8 0.7 1.5 1.0 1.5 1.2 1.2 0.5 0.5 0.7 WIND STEADINESES (MEAN %) 66.7 61.1 50.0 36.4 30.4 53.6 40.0 51.7 57.1 57.1 62.5 62.5 36.8 WIND SPEED (MEAN KNOTS) 0.3 1.8 2.0 2.2 2.3 2.8 2.5 2.9 2.1 2.1 0.8 0.8 1.9 FASTEST WIND DIRECTION 210 290 360 330 40 360 360 360 330 360 340 280 40 FASTEST WIND SPEED (KNOTS) 10 16 16 16 19 19 19 19 12 17 8 12 19 DAY 31 6 3 4 19 9 28 10 7 11 4 4 DAYS WITH SKY CLEAR (0-2)/8 11 19 11 17 20 25 30 27 30 26 16 13 245 DAYS WITH P.CLOUDY (3-6)/8 12 6 14 12 9 5 1 4 0 4 9 14 90 DAYS WITH CLOUDY (7-8)/8 8 3 6 1 2 0 0 0 0 1 5 4 30 DAYS WITH VISIBILITY =< 2 KM 2 1 0 0 1 0 0 1 0 0 0 0 5 DURATION OF SUNSHINE HOURS 119.8 198.3 176.8 265.7 304.3 331.4 346.9 320.9 313.4 258.6 164.7 146.1 2946.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 884.9 878.4 884.4 880.2 881.3 877.5 877.4 881.7 882.6 885.4 887.6 885.3 882.2 MAX. QFE PRESSURE IN HPA 891.0 888.6 896.4 892.3 890.9 883.8 881.9 887.5 890.8 894.0 894.0 893.6 896.4 DAY-HOUR 14- 6 12- 6 5-21 17- 6 12- 6 10- 6 12- 6 13- 6 22- 6 31-21 1- 6 9- 6 MIN. QFE PRESSURE IN HPA 877.3 866.0 869.5 874.9 874.6 871.4 870.9 875.6 875.9 877.1 882.3 870.4 866.0 DAY-HOUR 2-15 26-15 24-12 3-12 21-15 20-15 26-15 8-12 6-15 11- 0 7-12 19- 0 MEAN QNH PRESSURE IN HPA 1013.3 1006.0 1012.8 1008.1 1009.3 1005.1 1005.0 1009.7 1010.7 1013.8 1016.4 1013.8 1010.3 MAX. QNH PRESSURE IN HPA 1020.1 1017.5 1026.2 1021.6 1020.0 1012.1 1010.0 1016.2 1019.9 1023.5 1023.5 1023.0 1026.2 DAY-HOUR 14- 6 12- 6 5-21 17- 6 12- 6 10- 6 12- 6 13- 6 22- 6 31-21 1- 6 9- 6 MIN. QNH PRESSURE IN HPA 1004.8 992.2 996.1 1002.2 1001.8 998.3 997.7 1002.9 1003.3 1004.6 1010.4 997.1 992.2 DAY-HOUR 2-15 26-15 24-12 3-12 21-15 20-15 26-15 8-12 6-15 11- 0 7-12 19- 0 MEAN QFF PRESSURE IN HPA 1015.4 1006.6 1012.3 1002.5 1001.4 994.4 993.5 1000.2 1001.7 1008.7 1013.8 1014.3 1005.4 MAX. QFF PRESSURE IN HPA 1023.2 1021.9 1031.7 1018.4 1013.7 1004.7 1001.0 1007.6 1012.4 1020.9 1021.2 1023.8 1031.7 DAY-HOUR 4- 6 24- 6 11- 6 17- 6 12- 6 10- 6 29- 6 30- 6 22- 6 31-21 19- 6 14- 6 MIN. QFF PRESSURE IN HPA 1006.6 992.1 990.3 994.1 993.0 986.9 985.5 991.8 992.7 997.6 1005.6 996.0 985.5 DAY-HOUR 16-12 26-15 24-12 23-21 21-12 8-15 26-15 8-12 7-12 10-21 7-12 19- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 884.7 878.2 884.2 880.0 881.2 877.5 877.4 881.7 882.4 884.9 887.5 885.1 882.1 MAX. QFE PRESSURE IN HPA 889.5 886.2 896.1 889.1 888.3 882.2 880.8 886.1 888.5 890.3 893.0 892.6 896.1 DAY 28 12 6 17 12 10 15 14 23 7 1 9 MIN. QFE PRESSURE IN HPA 877.9 870.0 871.4 876.0 875.2 874.0 872.9 877.8 876.5 877.1 882.7 870.4 870.0 DAY 3 17 25 24 4 4 27 9 7 11 11 19 MEAN QNH PRESSURE IN HPA 1013.0 1005.9 1012.5 1007.9 1009.2 1005.0 1005.0 1009.8 1010.6 1013.3 1016.2 1013.5 1010.2 MAX. QNH PRESSURE IN HPA 1018.5 1014.8 1025.8 1018.0 1017.1 1010.3 1008.7 1014.7 1017.3 1019.4 1022.4 1021.9 1025.8 DAY 28 12 6 17 12 10 15 14 23 7 1 9 MIN. QNH PRESSURE IN HPA 1005.5 996.7 998.3 1003.4 1002.5 1001.2 999.9 1005.4 1003.9 1004.6 1010.9 997.1 996.7 DAY 3 17 25 24 4 4 27 9 7 11 11 19 MEAN QFF PRESSURE IN HPA 1014.9 1006.0 1011.8 1002.2 1001.4 994.4 993.4 1000.0 1001.4 1007.7 1013.3 1013.6 1005.0 MAX. QFF PRESSURE IN HPA 1021.6 1016.5 1029.7 1014.0 1010.7 1002.5 996.8 1006.6 1009.2 1013.9 1020.0 1021.8 1029.7 DAY 7 25 11 18 12 10 15 31 23 7 1 9 MIN. QFF PRESSURE IN HPA 1008.5 995.2 993.1 994.5 995.0 989.2 987.5 994.4 993.5 998.3 1005.9 996.0 987.5 DAY 30 17 25 24 22 4 27 9 7 11 11 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 884.7 878.6 884.5 880.7 882.0 878.4 878.3 882.4 883.0 885.6 887.7 885.2 882.6 MAX. QFE PRESSURE IN HPA 889.4 887.1 895.3 890.5 889.5 883.3 881.8 886.6 889.0 890.5 893.0 892.6 895.3 DAY 25 12 6 17 12 10 15 14 22 7 1 9 MIN. QFE PRESSURE IN HPA 880.0 869.0 872.6 876.0 877.0 874.4 873.5 878.4 877.3 878.0 882.7 870.9 869.0 DAY 2 6 24 24 4 21 27 9 7 11 11 19 MEAN QNH PRESSURE IN HPA 1013.1 1006.3 1012.9 1008.6 1010.1 1006.1 1006.0 1010.5 1011.2 1014.1 1016.4 1013.7 1010.7 MAX. QNH PRESSURE IN HPA 1018.4 1015.8 1024.9 1019.6 1018.5 1011.5 1009.9 1015.2 1017.9 1019.6 1022.4 1021.9 1024.9 DAY 25 12 6 17 12 10 15 14 22 7 1 9 MIN. QNH PRESSURE IN HPA 1007.9 995.6 999.6 1003.4 1004.5 1001.6 1000.6 1006.1 1004.8 1005.6 1010.9 997.7 995.6 DAY 2 6 24 24 4 21 27 9 7 11 11 19 MEAN QFF PRESSURE IN HPA 1015.5 1007.2 1012.8 1003.5 1002.7 995.7 994.6 1001.4 1002.7 1009.5 1014.3 1014.8 1006.2 MAX. QFF PRESSURE IN HPA 1021.9 1020.3 1031.0 1016.5 1013.3 1004.3 998.2 1007.1 1011.2 1015.4 1020.7 1022.8 1031.0 DAY 7 24 11 17 12 10 16 30 22 31 1 9 MIN. QFF PRESSURE IN HPA 1009.3 995.1 994.7 995.0 996.4 990.0 988.7 995.6 995.0 999.8 1006.8 996.8 988.7 DAY 31 6 24 24 22 21 27 9 7 11 11 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION SEMNAN (40757) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 35 35 N LONGITUDE 53 33 E DATA PROCESSING CENTER ELEVATION 1130.8 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 885.9 879.7 885.9 881.7 882.7 879.0 878.9 883.1 884.1 886.9 889.0 886.6 883.6 MAX. QFE PRESSURE IN HPA 891.0 888.6 896.3 892.3 890.9 883.8 881.9 887.5 890.8 891.4 894.0 893.6 896.3 DAY 14 12 5 17 12 10 12 13 22 7 1 9 MIN. QFE PRESSURE IN HPA 880.4 869.8 872.2 876.6 877.8 875.0 874.8 878.1 878.0 880.4 883.6 872.9 869.8 DAY 2 6 24 24 4 21 26 8 7 11 11 19 MEAN QNH PRESSURE IN HPA 1014.4 1007.5 1014.4 1009.8 1010.8 1006.8 1006.6 1011.3 1012.4 1015.5 1017.9 1015.2 1011.9 MAX. QNH PRESSURE IN HPA 1020.1 1017.5 1026.0 1021.6 1020.0 1012.1 1010.0 1016.2 1019.9 1020.6 1023.5 1023.0 1026.0 DAY 14 12 5 17 12 10 12 13 22 7 1 9 MIN. QNH PRESSURE IN HPA 1008.3 996.5 999.1 1004.1 1005.4 1002.3 1002.1 1005.7 1005.6 1008.3 1011.9 999.9 996.5 DAY 2 6 24 24 4 21 26 8 7 11 11 19 MEAN QFF PRESSURE IN HPA 1016.8 1008.4 1014.2 1004.2 1003.1 996.1 995.1 1001.9 1003.5 1010.4 1015.4 1015.9 1007.1 MAX. QFF PRESSURE IN HPA 1023.2 1021.9 1031.7 1018.4 1013.7 1004.7 1001.0 1007.6 1012.4 1017.6 1021.2 1023.8 1031.7 DAY 4 24 11 17 12 10 29 30 22 31 19 14 MIN. QFF PRESSURE IN HPA 1009.5 996.4 994.0 995.5 997.0 990.2 989.9 994.9 995.3 1002.1 1007.4 998.8 989.9 DAY 16 6 24 24 22 21 26 8 7 11 11 19 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 885.1 878.9 885.2 880.8 881.7 878.2 877.9 882.2 883.3 885.9 888.0 885.4 882.7 MAX. QFE PRESSURE IN HPA 891.0 887.9 895.9 891.6 890.3 882.6 881.2 886.4 889.6 892.0 892.3 892.5 895.9 DAY 14 12 5 17 12 6 29 13 22 31 19 9 MIN. QFE PRESSURE IN HPA 878.4 868.7 871.6 876.0 876.1 874.2 873.3 877.2 877.8 879.8 883.1 872.2 868.7 DAY 2 6 24 24 4 8 26 8 7 11 11 19 MEAN QNH PRESSURE IN HPA 1013.6 1006.6 1013.6 1008.8 1009.8 1005.9 1005.6 1010.3 1011.5 1014.4 1016.8 1013.9 1010.9 MAX. QNH PRESSURE IN HPA 1020.1 1016.7 1025.6 1020.8 1019.4 1010.8 1009.2 1015.0 1018.6 1021.3 1021.6 1021.8 1025.6 DAY 14 12 5 17 12 6 29 13 22 31 19 9 MIN. QNH PRESSURE IN HPA 1006.1 995.2 998.5 1003.4 1003.5 1001.4 1000.4 1004.7 1005.4 1007.6 1011.3 999.1 995.2 DAY 2 6 24 24 4 8 26 8 7 11 11 19 MEAN QFF PRESSURE IN HPA 1015.5 1007.0 1013.0 1002.8 1001.7 995.1 993.9 1000.6 1002.2 1008.8 1013.8 1014.0 1005.7 MAX. QFF PRESSURE IN HPA 1021.5 1020.7 1030.4 1016.9 1012.7 1002.9 999.6 1006.5 1010.3 1017.5 1019.0 1022.3 1030.4 DAY 4 24 11 17 12 10 29 30 22 31 19 14 MIN. QFF PRESSURE IN HPA 1008.7 995.1 993.2 994.3 995.2 989.3 988.0 993.7 994.7 1000.6 1006.4 996.9 988.0 DAY 16 6 24 24 21 21 26 8 7 11 11 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 884.2 877.3 883.5 879.2 880.2 876.7 876.4 880.5 881.6 884.5 886.8 884.5 881.3 MAX. QFE PRESSURE IN HPA 890.5 886.0 894.0 889.4 888.8 881.8 879.3 885.0 888.3 891.4 891.4 891.8 894.0 DAY 14 24 5 17 12 10 15 30 22 31 17 9 MIN. QFE PRESSURE IN HPA 877.6 867.0 869.5 874.9 875.0 872.2 871.6 875.6 876.1 878.4 882.3 872.4 867.0 DAY 2 26 24 3 21 8 26 8 7 10 7 19 MEAN QNH PRESSURE IN HPA 1012.5 1004.8 1011.7 1007.0 1008.0 1004.1 1003.8 1008.4 1009.6 1012.8 1015.4 1012.9 1009.3 MAX. QNH PRESSURE IN HPA 1019.6 1014.6 1023.5 1018.4 1017.7 1009.9 1007.1 1013.4 1017.1 1020.6 1020.6 1021.0 1023.5 DAY 14 24 5 17 12 10 15 30 22 31 17 9 MIN. QNH PRESSURE IN HPA 1005.2 993.3 996.1 1002.2 1002.3 999.1 998.5 1002.9 1003.5 1006.1 1010.4 999.4 993.3 DAY 2 26 24 3 21 8 26 8 7 10 7 19 MEAN QFF PRESSURE IN HPA 1014.2 1005.0 1010.8 1001.1 1000.0 993.4 992.1 998.7 1000.3 1007.3 1012.4 1013.1 1004.0 MAX. QFF PRESSURE IN HPA 1021.7 1018.4 1028.0 1014.