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 **