STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** 25.6 24.6 19.4 12.4 5.8 -0.0 ***** MINIMUN AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** 18.8 18.1 12.7 7.0 2.8 -1.9 ***** DAYS WITH MINIMUM TEMP. >=21 **** **** **** **** **** **** 5 1 0 0 0 0 **** DAYS WITH MINIMUM TEMP. <=-4 **** **** **** **** **** **** 0 0 0 0 2 9 **** DAYS WITH FREEZING MIN.<= 0 **** **** **** **** **** **** 0 0 0 0 9 26 **** TEMPERATURE RECORDS LOWEST(C) ***** ***** ***** ***** ***** ***** 14.0 13.0 8.0 2.0 -5.0 -7.0 ***** DAY ** ** ** ** ** ** 1 27 24 8 29 14 MAXIMUM AIR TEMPERATURE (C) ***** ***** ***** ***** ***** ***** 33.9 32.9 28.3 20.2 10.8 3.1 ***** DAYS WITH MAXIMUM TEMP. >=30 **** **** **** **** **** **** 28 27 8 0 0 0 **** DAYS WITH MAXIMUM TEMP. <= 0 **** **** **** **** **** **** 0 0 0 0 3 9 **** TEMPERATURE RECORDS HIGHEST(C)***** ***** ***** ***** ***** ***** 40.0 38.0 37.0 29.0 20.0 9.0 ***** DAY ** ** ** ** ** ** 17 8 2 1 5 19 DIF. BETWEEN (MAX.-MIN.) 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(HPA) ****** ****** ****** ****** ****** ****** ****** ****** ****** 6.46 2.94 1.00 ****** RELATIVE HUMIDITY (MEAN %) *** *** *** *** *** *** *** *** *** 63 75 85 *** RELATIVE HUMIDITY (MAX. %) *** *** *** *** *** *** *** *** *** 85 89 92 *** RELATIVE HUMIDITY (MIN. %) *** *** *** *** *** *** *** *** *** 35 55 73 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** *** *** *** *** *** *** *** *** 81 87 89 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** *** *** *** *** *** *** *** *** 44 66 81 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** *** *** *** *** *** *** *** *** 54 65 81 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. ****** ****** ****** ****** ****** ****** 6.2 0.2 8.0 4.8 26.4 2.6 ****** DAYS WITH PRECIPITATION >=10 **** **** **** **** **** **** 0 0 0 0 0 0 **** DAYS WITH PRECIPITATION >= 5 **** **** **** **** **** **** 0 0 1 0 3 0 **** DAYS WITH PRECIPITATION >= 1 **** **** **** **** **** **** 3 0 2 4 7 2 **** DAYS WITH PRECIPITATION **** **** **** **** **** **** 7 5 2 14 11 5 **** GREATEST DAILY PRECIPITATION ****** ****** ****** ****** ****** ****** 3.0 0.2 5.0 1.3 9.0 1.1 ****** DAY ** ** ** ** ** ** 26 1 23 28 19 10 DAY WITH THUNDER STORM **** **** **** **** **** **** 2 2 0 2 1 0 **** DAYS WITH SNOW OR SLEET **** **** **** **** **** **** 0 0 0 0 6 2 **** DAYS WITH DUST **** **** **** **** **** **** 3 0 0 0 0 0 **** WIND DIRECTION (PREVAILING) *** *** *** *** *** *** 45 45 45 45 270 225 *** PREVAILING WIND SPEED(KNOTS) **** **** **** **** **** **** 3.8 3.9 4.4 4.8 2.8 8.3 **** PREVAILING WIND PERCENT ***** ***** ***** ***** ***** ***** 13.0 10.9 6.7 9.7 2.5 2.4 ***** CALMS PERCENT OF WIND ***** ***** ***** ***** ***** ***** 58.3 64.4 81.2 78.2 90.0 95.5 ***** NO. OF WIND OBSERVATION **** **** **** **** **** **** 247 247 239 248 239 247 1467 VECTOR WIND DIRECTION (MEAN) *** *** *** *** *** *** 50 12 20 88 242 211 *** VECTOR WIND MAGNITUDE(KNOTS) **** **** **** **** **** **** 0.4 0.8 0.4 0.6 0.1 0.3 **** WIND STEADINESES (MEAN %) ***** ***** ***** ***** ***** ***** 21.1 57.1 50.0 42.9 33.3 100.0 ***** WIND SPEED (MEAN KNOTS) **** **** **** **** **** **** 1.9 1.4 0.8 1.4 0.3 0.3 **** FASTEST WIND DIRECTION *** *** *** *** *** *** 200 50 280 50 180 210 *** FASTEST WIND SPEED (KNOTS) *** *** *** *** *** *** 26 14 12 20 10 16 *** DAY ** ** ** ** ** ** 8 19 14 14 5 20 DAYS WITH SKY CLEAR (0-2)/8 **** **** **** **** **** **** 20 25 26 10 8 6 **** DAYS WITH P.CLOUDY (3-6)/8 **** **** **** **** **** **** 10 5 3 16 10 5 **** DAYS WITH CLOUDY (7-8)/8 **** **** **** **** **** **** 1 1 1 5 12 20 **** DAYS WITH VISIBILITY =< 2 KM **** **** **** **** **** **** 0 0 0 0 0 6 **** DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. 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QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.0 1024.7 1029.0 ****** DAY ** ** ** ** ** ** ** ** ** 20 3 14 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1004.8 1011.2 1010.4 ****** DAY ** ** ** ** ** ** ** ** ** 12 16 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1012.7 1018.0 1024.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1021.0 1028.0 1035.2 ****** DAY ** ** ** ** ** ** ** ** ** 20 29 14 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 999.8 1009.6 1012.0 ****** DAY ** ** ** ** ** ** ** ** ** 12 16 20 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 888.5 890.2 893.4 ****** MAX. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1018.1 1027.2 1034.4 ****** DAY ** ** ** ** ** ** ** ** ** 21 29 14 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 998.6 1007.8 1010.0 ****** DAY ** ** ** ** ** ** ** ** ** 12 5 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 888.4 890.6 893.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 894.4 895.9 900.4 ****** DAY ** ** ** ** ** ** ** ** ** 20 22 14 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 879.9 885.2 886.0 ****** DAY ** ** ** ** ** ** ** ** ** 11 5 20 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.9 1016.4 1019.7 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1020.6 1022.2 1027.2 ****** DAY ** ** ** ** ** ** ** ** ** 20 22 14 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1004.4 1010.3 1011.2 ****** DAY ** ** ** ** ** ** ** ** ** 11 5 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1012.2 1017.4 1023.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.6 1027.5 1033.8 ****** DAY ** ** ** ** ** ** ** ** ** 20 29 14 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1001.1 1009.4 1012.5 ****** DAY ** ** ** ** ** ** ** ** ** 12 5 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 889.4 890.8 893.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 895.5 896.2 900.8 ****** DAY ** ** ** ** ** ** ** ** ** 26 2 14 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 879.9 885.9 886.2 ****** DAY ** ** ** ** ** ** ** ** ** 11 5 20 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.0 1016.6 1019.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1021.8 1022.6 1027.7 ****** DAY ** ** ** ** ** ** ** ** ** 26 2 14 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1004.4 1011.1 1011.4 ****** DAY ** ** ** ** ** ** ** ** ** 11 5 20 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1013.4 1018.1 1024.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1021.0 1027.7 1034.6 ****** DAY ** ** ** ** ** ** ** ** ** 20 29 14 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1001.5 1009.2 1013.0 ****** DAY ** ** ** ** ** ** ** ** ** 11 5 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 889.5 890.8 893.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 895.6 896.9 900.4 ****** DAY ** ** ** ** ** ** ** ** ** 20 2 14 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 879.8 886.0 885.9 ****** DAY ** ** ** ** ** ** ** ** ** 11 15 19 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.2 1016.5 1020.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1021.9 1023.3 1027.2 ****** DAY ** ** ** ** ** ** ** ** ** 20 2 14 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1004.3 1011.2 1011.1 ****** DAY ** ** ** ** ** ** ** ** ** 11 15 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1012.0 1016.9 1023.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1019.8 1026.8 1033.3 ****** DAY ** ** ** ** ** ** ** ** ** 20 29 14 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 999.8 1008.9 1012.5 ****** DAY ** ** ** ** ** ** ** ** ** 11 5 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.4 4.8 4.8 10.8 19.1 22.3 23.6 24.4 21.3 15.2 8.1 2.0 13.2 MINIMUN AIR TEMPERATURE (C) -0.8 0.9 0.8 7.1 12.8 15.8 17.5 17.6 14.0 7.8 4.0 -2.8 7.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 0 0 0 0 0 3 DAYS WITH MINIMUM TEMP. <=-4 5 7 5 0 0 0 0 0 0 0 0 15 32 DAYS WITH FREEZING MIN.<= 0 18 13 13 0 0 0 0 0 0 0 6 30 80 TEMPERATURE RECORDS LOWEST(C) -9.0 -10.0 -7.0 1.0 8.0 12.0 14.0 13.0 9.0 5.0 -2.0 -6.0 -10.0 DAY 28 11 13 8 19 6 9 26 23 23 23 25 MAXIMUM AIR TEMPERATURE (C) 8.5 12.0 10.4 16.4 27.2 30.8 31.3 32.2 29.6 24.8 13.8 9.1 20.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 10 20 22 24 16 1 0 0 93 DAYS WITH MAXIMUM TEMP. <= 0 0 0 1 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 15.0 20.0 19.0 23.0 32.0 36.0 37.0 37.0 35.0 30.0 25.0 12.0 37.0 DAY 17 20 30 22 26 14 28 9 13 1 2 1 DIF. BETWEEN (MAX.-MIN.) (C) 9.3 11.1 9.6 9.3 14.4 15.0 13.8 14.6 15.6 17.0 9.8 11.9 12.6 MEAN DAILY TEMP. (MDT) (C) 3.9 6.4 5.6 11.8 20.0 23.3 24.4 24.9 21.8 16.3 8.9 3.1 14.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 21.5 76.0 106.5 123.0 48.5 0.0 0.0 0.0 375.5 HEATING DEG. DAYS(BASE 18 0C) 437.5 335.0 384.5 187.0 14.0 0.5 0.0 0.0 0.5 58.0 274.0 460.5 2151.5 DEWPOINT (MEAN C) -2.4 -3.8 -2.5 5.5 8.3 11.8 12.4 10.9 8.8 5.3 2.3 -1.9 4.6 MIXING RATIO (G/KG) 3.75 3.48 3.82 6.55 7.95 10.13 10.50 9.59 8.24 6.43 5.30 3.77 6.63 VAPOUR PRESSURE (HPA) 5.32 4.93 5.41 9.22 11.20 14.15 14.64 13.39 11.59 9.11 7.53 5.37 9.32 SATURATION DEF. (HPA) 2.27 4.36 3.73 4.38 12.17 14.15 15.97 18.67 15.19 9.12 3.89 1.94 8.82 RELATIVE HUMIDITY (MEAN %) 73 57 63 73 54 56 54 46 49 56 70 79 61 RELATIVE HUMIDITY (MAX. %) 89 77 84 94 80 80 76 65 71 77 84 96 81 RELATIVE HUMIDITY (MIN. %) 49 34 42 49 30 33 33 27 28 30 51 49 38 RELATIVE HUMIDITY (MEAN% 03UTC) 86 69 79 90 77 76 74 64 68 73 79 93 77 RELATIVE HUMIDITY (MEAN% 09UTC) 70 52 52 65 40 42 43 38 40 43 63 60 51 RELATIVE HUMIDITY (MEAN% 15UTC) 57 41 48 58 37 39 36 29 30 40 59 62 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 4.6 9.6 48.4 44.7 11.5 5.1 11.4 0.5 1.0 5.4 47.7 0.6 190.5 DAYS WITH PRECIPITATION >=10 0 0 2 1 0 0 0 0 0 0 2 0 5 DAYS WITH PRECIPITATION >= 5 0 0 3 5 0 0 0 0 0 0 5 0 13 DAYS WITH PRECIPITATION >= 1 2 3 9 7 5 1 5 0 1 2 6 0 41 DAYS WITH PRECIPITATION 5 6 16 21 18 14 9 3 2 5 11 4 114 GREATEST DAILY PRECIPITATION 3.5 4.0 20.0 14.0 4.0 3.0 3.0 0.2 1.0 3.0 13.0 0.4 20.0 DAY 7 10 28 11 17 20 5 4 6 10 19 2 DAY WITH THUNDER STORM 0 0 0 3 12 2 3 0 1 3 0 0 24 DAYS WITH SNOW OR SLEET 3 2 8 0 0 0 0 0 0 0 2 1 16 DAYS WITH DUST 0 0 2 0 0 1 0 0 1 3 2 0 9 WIND DIRECTION (PREVAILING) 225 225 45 45 45 45 45 45 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 6.1 11.2 5.4 5.9 5.7 5.1 6.4 4.7 4.0 4.1 3.9 4.9 4.8 PREVAILING WIND PERCENT 7.3 10.8 8.5 7.5 8.5 7.1 11.3 12.6 13.8 14.6 7.1 8.1 8.9 CALMS PERCENT OF WIND 80.6 74.5 73.7 75.7 74.5 83.3 75.3 78.9 82.4 74.1 86.2 80.2 78.3 NO. OF WIND OBSERVATION 247 231 247 239 247 239 247 247 239 247 239 247 2916 VECTOR WIND DIRECTION (MEAN) 208 214 221 184 112 97 39 39 53 34 2 10 68 VECTOR WIND MAGNITUDE(KNOTS) 0.6 1.5 0.2 0.2 0.2 0.3 1.1 0.7 0.6 0.4 0.3 0.3 0.1 WIND STEADINESES (MEAN %) 60.0 71.4 13.3 11.1 11.1 30.0 64.7 70.0 85.7 30.8 50.0 27.3 7.7 WIND SPEED (MEAN KNOTS) 1.0 2.1 1.5 1.8 1.8 1.0 1.7 1.0 0.7 1.3 0.6 1.1 1.3 FASTEST WIND DIRECTION 190 230 280 330 50 180 80 360 150 230 260 260 330 FASTEST WIND SPEED (KNOTS) 13 32 18 35 12 20 18 12 8 30 7 14 35 DAY 20 2 2 30 6 3 7 11 5 6 4 29 DAYS WITH SKY CLEAR (0-2)/8 17 7 9 5 14 23 23 30 27 25 12 11 203 DAYS WITH P.CLOUDY (3-6)/8 10 12 8 9 11 7 5 1 2 2 7 16 90 DAYS WITH CLOUDY (7-8)/8 4 10 14 16 6 0 3 0 1 4 11 4 73 DAYS WITH VISIBILITY =< 2 KM 1 1 1 0 0 0 0 0 0 0 0 1 4 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 889.1 888.4 885.8 885.5 887.6 884.2 882.9 882.0 886.8 891.2 892.0 891.9 887.3 MAX. QFE PRESSURE IN HPA 895.7 897.4 894.9 897.7 894.2 892.6 897.3 889.5 893.0 897.4 898.7 898.1 898.7 DAY-HOUR 19- 6 14- 6 22- 9 7- 9 1- 9 7- 6 30- 0 14- 6 20- 6 29- 9 26- 6 7- 6 MIN. QFE PRESSURE IN HPA 877.4 872.9 875.3 874.2 877.9 874.0 872.4 872.2 881.1 883.2 880.0 880.4 872.2 DAY-HOUR 7- 9 29-12 2-12 4-18 30-15 20-12 12-15 23- 0 4-15 6-21 19- 0 29-12 MEAN QNH PRESSURE IN HPA 1014.7 1013.9 1011.0 1010.6 1012.9 1009.3 1007.7 1006.8 1012.1 1017.0 1017.9 1017.8 1012.6 MAX. QNH PRESSURE IN HPA 1022.0 1023.9 1021.1 1024.2 1020.3 1018.6 1023.8 1015.1 1019.0 1023.9 1025.4 1024.7 1025.4 DAY-HOUR 19- 6 14- 6 22- 9 7- 9 1- 9 7- 6 30- 0 14- 6 20- 6 29- 9 26- 6 7- 6 MIN. QNH PRESSURE IN HPA 1001.6 996.6 999.3 998.1 1002.2 997.9 996.1 995.9 1005.8 1008.1 1004.5 1005.0 995.9 DAY-HOUR 7- 9 29-12 2-12 4-18 30-15 20-12 12-15 23- 0 4-15 6-21 19- 0 29-12 MEAN QFF PRESSURE IN HPA 1017.3 1015.3 1012.3 1008.9 1007.4 1002.2 1000.0 998.8 1005.7 1013.4 1017.6 1020.6 1010.0 MAX. QFF PRESSURE IN HPA 1029.4 1029.2 1025.1 1024.7 1017.5 1014.3 1014.4 1007.8 1014.6 1021.5 1028.9 1028.9 1029.4 DAY-HOUR 28- 6 14- 6 13- 6 7-18 1- 6 7- 6 30- 0 14- 6 20- 6 24- 6 26- 6 7- 6 MIN. QFF PRESSURE IN HPA 1002.3 993.6 999.3 996.1 995.3 988.5 987.8 986.3 998.5 1003.3 1003.6 1004.5 986.3 DAY-HOUR 23-12 29-12 2-12 4-18 30-15 20-12 12-15 23- 0 4-15 6-21 19- 6 29-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 889.0 888.7 885.9 885.6 888.1 884.6 883.4 882.2 887.1 891.3 891.9 891.7 887.5 MAX. QFE PRESSURE IN HPA 895.2 896.0 894.2 896.4 893.4 891.6 897.3 888.4 891.6 895.3 897.7 896.9 897.7 DAY 19 14 20 8 2 7 30 14 20 23 26 8 MIN. QFE PRESSURE IN HPA 879.4 880.1 878.8 876.9 881.2 879.0 878.3 872.2 882.8 883.8 880.0 881.7 872.2 DAY 8 29 2 5 31 22 2 23 5 7 19 30 MEAN QNH PRESSURE IN HPA 1014.6 1014.3 1011.1 1010.8 1013.6 1009.7 1008.3 1006.9 1012.4 1017.1 1017.8 1017.6 1012.8 MAX. QNH PRESSURE IN HPA 1021.5 1022.3 1020.3 1022.8 1019.5 1017.5 1023.8 1013.9 1017.5 1021.6 1024.2 1023.3 1024.2 DAY 19 14 20 8 2 7 30 14 20 23 26 8 MIN. QNH PRESSURE IN HPA 1003.9 1004.6 1003.2 1001.1 1005.9 1003.4 1002.6 995.9 1007.7 1008.8 1004.5 1006.4 995.9 DAY 8 29 2 5 31 22 2 23 5 7 19 30 MEAN QFF PRESSURE IN HPA 1016.5 1014.9 1011.8 1008.6 1007.6 1001.9 1000.1 998.4 1005.2 1012.6 1016.8 1019.6 1009.5 MAX. QFF PRESSURE IN HPA 1027.0 1026.4 1024.1 1022.8 1015.4 1012.0 1014.4 1005.5 1012.2 1018.7 1026.4 1025.5 1027.0 DAY 28 11 14 8 2 7 30 14 21 23 26 8 MIN. QFF PRESSURE IN HPA 1003.0 1002.0 1002.1 998.7 997.7 995.9 994.1 986.3 999.4 1003.8 1003.9 1007.8 986.3 DAY 23 29 1 5 31 30 6 23 5 7 19 30 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 889.2 888.6 886.0 885.9 888.3 885.1 883.7 883.1 887.7 891.7 892.2 892.1 887.8 MAX. QFE PRESSURE IN HPA 895.4 896.4 894.0 896.1 893.3 892.2 887.5 889.3 892.4 896.2 898.1 897.3 898.1 DAY 19 14 20 8 2 7 30 14 20 24 26 7 MIN. QFE PRESSURE IN HPA 879.2 877.4 878.2 880.0 881.6 879.4 878.9 876.8 884.4 885.4 880.0 882.4 876.8 DAY 23 22 2 5 31 22 6 24 5 7 19 30 MEAN QNH PRESSURE IN HPA 1014.8 1014.1 1011.2 1011.1 1013.8 1010.2 1008.6 1008.0 1013.1 1017.6 1018.1 1018.0 1013.2 MAX. QNH PRESSURE IN HPA 1021.7 1022.8 1020.1 1022.5 1019.3 1018.1 1012.9 1014.9 1018.3 1022.6 1024.7 1023.8 1024.7 DAY 19 14 20 8 2 7 30 14 20 24 26 7 MIN. QNH PRESSURE IN HPA 1003.6 1001.6 1002.5 1004.5 1006.3 1003.9 1003.3 1001.0 1009.4 1010.5 1004.5 1007.2 1001.0 DAY 23 22 2 5 31 22 6 24 5 7 19 30 MEAN QFF PRESSURE IN HPA 1017.3 1015.6 1012.6 1009.6 1008.8 1003.5 1001.2 1000.3 1006.8 1014.2 1017.9 1020.9 1010.7 MAX. QFF PRESSURE IN HPA 1028.1 1027.2 1024.1 1022.9 1016.7 1013.3 1006.1 1007.3 1013.2 1020.1 1027.3 1027.0 1028.1 DAY 28 11 14 8 1 7 9 14 20 23 26 8 MIN. QFF PRESSURE IN HPA 1003.8 999.7 1002.6 1001.6 999.1 997.2 995.1 992.5 1001.7 1006.5 1004.0 1009.7 992.5 DAY 23 22 8 26 31 22 6 24 5 7 19 29 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 889.7 889.3 886.4 886.3 888.7 885.5 884.1 883.7 888.6 892.4 893.0 892.8 888.4 MAX. QFE PRESSURE IN HPA 895.7 897.4 893.7 896.6 894.0 892.6 888.0 889.5 893.0 896.8 898.7 898.1 898.7 DAY 19 14 20 7 1 7 29 14 20 24 26 7 MIN. QFE PRESSURE IN HPA 879.0 878.2 878.2 880.5 882.0 879.5 878.6 877.3 884.8 885.9 880.0 881.5 877.3 DAY 23 29 2 19 31 30 4 24 4 10 19 29 MEAN QNH PRESSURE IN HPA 1015.3 1014.9 1011.7 1011.6 1014.2 1010.7 1009.1 1008.6 1014.1 1018.3 1019.0 1018.8 1013.9 MAX. QNH PRESSURE IN HPA 1022.0 1023.9 1019.8 1023.0 1020.1 1018.6 1013.4 1015.1 1019.0 1023.2 1025.4 1024.7 1025.4 DAY 19 14 20 7 1 7 29 14 20 24 26 7 MIN. QNH PRESSURE IN HPA 1003.4 1002.5 1002.5 1005.1 1006.8 1004.0 1003.0 1001.5 1009.9 1011.1 1004.5 1006.2 1001.5 DAY 23 29 2 19 31 30 4 24 4 10 19 29 MEAN QFF PRESSURE IN HPA 1018.9 1017.4 1013.9 1010.3 1009.3 1004.2 1002.0 1001.2 1008.6 1015.8 1019.4 1022.9 1012.0 MAX. QFF PRESSURE IN HPA 1029.4 1029.2 1025.1 1024.5 1017.5 1014.3 1006.5 1007.8 1014.6 1021.5 1028.9 1028.9 1029.4 DAY 28 14 13 7 1 7 9 14 20 24 26 7 MIN. QFF PRESSURE IN HPA 1004.2 1001.7 1003.9 1002.1 999.7 997.1 995.3 993.8 1003.7 1008.0 1003.6 1006.8 993.8 DAY 23 29 2 19 31 30 12 24 16 10 19 29 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 890.0 889.4 886.9 886.2 888.0 885.1 883.7 883.1 887.9 892.2 892.6 892.7 888.1 MAX. QFE PRESSURE IN HPA 895.6 897.4 894.9 897.7 894.2 891.4 888.0 888.4 892.4 897.4 898.3 897.6 898.3 DAY 28 14 22 7 1 8 29 14 20 29 26 7 MIN. QFE PRESSURE IN HPA 877.4 875.6 877.1 879.6 880.8 877.8 876.9 876.5 884.4 886.9 880.6 881.0 875.6 DAY 7 29 2 19 30 20 12 24 4 5 19 29 MEAN QNH PRESSURE IN HPA 1015.6 1015.0 1012.3 1011.5 1013.4 1010.2 1008.6 1007.9 1013.3 1018.1 1018.6 1018.7 1013.6 MAX. QNH PRESSURE IN HPA 1021.9 1023.9 1021.1 1024.2 1020.3 1017.2 1013.4 1013.9 1018.3 1023.9 1024.9 1024.1 1024.9 DAY 28 14 22 7 1 8 29 14 20 29 26 7 MIN. QNH PRESSURE IN HPA 1001.6 999.6 1001.3 1004.1 1005.4 1002.1 1001.1 1000.6 1009.4 1012.2 1005.2 1005.7 999.6 DAY 7 29 2 19 30 20 12 24 4 5 19 29 MEAN QFF PRESSURE IN HPA 1018.2 1016.3 1013.6 1009.7 1007.2 1002.9 1000.8 999.6 1006.4 1014.2 1018.3 1021.3 1010.7 MAX. QFF PRESSURE IN HPA 1028.4 1027.9 1023.7 1024.5 1014.5 1011.4 1005.7 1005.7 1013.1 1020.4 1027.9 1026.9 1028.4 DAY 28 14 13 7 18 7 21 14 20 29 26 9 MIN. QFF PRESSURE IN HPA 1003.8 997.0 1001.5 1000.8 998.0 994.5 992.2 992.2 1001.4 1006.9 1004.5 1005.7 992.2 DAY 23 29 2 19 31 20 12 23 13 5 19 29 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 888.6 887.3 884.9 885.1 886.3 883.5 882.0 881.2 885.8 890.3 891.6 891.3 886.5 MAX. QFE PRESSURE IN HPA 894.7 895.7 894.2 897.2 892.2 890.1 887.6 886.3 890.7 895.2 896.5 896.0 897.2 DAY 27 14 19 7 1 6 29 14 20 24 26 7 MIN. QFE PRESSURE IN HPA 877.4 872.9 875.3 878.3 879.0 874.0 874.0 874.8 882.1 884.2 880.6 880.4 872.9 DAY 7 29 2 4 30 20 12 24 4 5 19 29 MEAN QNH PRESSURE IN HPA 1014.1 1012.7 1009.9 1010.2 1011.6 1008.5 1006.8 1005.9 1011.0 1016.0 1017.4 1017.1 1011.8 MAX. QNH PRESSURE IN HPA 1020.9 1022.0 1020.3 1023.7 1018.1 1015.8 1013.0 1011.5 1016.4 1021.5 1022.9 1022.3 1023.7 DAY 27 14 19 7 1 6 29 14 20 24 26 7 MIN. QNH PRESSURE IN HPA 1001.6 996.6 999.3 1002.6 1003.4 997.9 997.9 998.7 1006.9 1009.2 1005.2 1005.0 996.6 DAY 7 29 2 4 30 20 12 24 4 5 19 29 MEAN QFF PRESSURE IN HPA 1015.9 1013.2 1010.6 1008.0 1005.5 1000.7 998.4 997.3 1003.8 1011.5 1016.6 1019.0 1008.4 MAX. QFF PRESSURE IN HPA 1026.2 1025.0 1023.3 1023.1 1014.4 1010.7 1003.4 1004.4 1011.7 1017.6 1025.6 1024.4 1026.2 DAY 27 14 13 7 18 6 21 31 20 24 26 7 MIN. QFF PRESSURE IN HPA 1002.3 993.6 999.3 999.2 995.8 988.5 988.6 989.0 998.5 1003.6 1005.0 1004.5 988.5 DAY 23 29 2 19 30 20 12 11 13 5 19 29 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 888.8 887.2 884.8 884.6 886.0 882.6 881.0 880.1 885.1 889.9 891.3 891.3 886.1 MAX. QFE PRESSURE IN HPA 894.8 895.3 893.6 896.2 891.8 890.5 887.6 885.2 889.7 895.2 896.1 895.9 896.2 DAY 18 13 19 7 1 6 29 31 20 29 26 7 MIN. QFE PRESSURE IN HPA 878.4 873.3 875.8 875.2 877.9 875.0 872.4 873.1 881.1 883.8 880.2 880.4 872.4 DAY 7 29 2 4 30 30 12 11 4 6 19 29 MEAN QNH PRESSURE IN HPA 1014.3 1012.5 1009.9 1009.6 1011.2 1007.4 1005.7 1004.6 1010.2 1015.6 1017.1 1017.1 1011.3 MAX. QNH PRESSURE IN HPA 1021.0 1021.6 1019.7 1022.6 1017.7 1016.2 1013.0 1010.3 1015.3 1021.5 1022.5 1022.2 1022.6 DAY 18 13 19 7 1 6 29 31 20 29 26 7 MIN. QNH PRESSURE IN HPA 1002.8 997.1 999.9 999.2 1002.2 999.0 996.1 996.9 1005.8 1008.8 1004.8 1005.0 996.1 DAY 7 29 2 4 30 30 12 11 4 6 19 29 MEAN QFF PRESSURE IN HPA 1016.8 1013.9 1011.2 1008.0 1006.1 1000.7 998.2 996.9 1003.9 1012.3 1017.0 1019.9 1008.7 MAX. QFF PRESSURE IN HPA 1027.0 1025.9 1023.8 1022.7 1014.3 1011.9 1003.9 1004.1 1010.5 1018.8 1025.5 1025.2 1027.0 DAY 27 13 13 7 1 6 29 31 20 29 26 7 MIN. QFF PRESSURE IN HPA 1005.7 995.2 1000.8 996.9 995.3 991.3 987.8 988.1 998.5 1004.3 1004.7 1005.6 987.8 DAY 7 29 2 4 30 30 12 11 4 5 19 29 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 889.0 888.2 885.7 885.1 887.2 883.4 882.4 881.0 886.0 890.8 891.5 891.6 886.8 MAX. QFE PRESSURE IN HPA 895.1 895.8 894.4 896.4 893.4 890.7 887.1 886.7 890.1 895.0 896.8 896.1 896.8 DAY 18 13 19 7 1 6 29 13 19 27 25 7 MIN. QFE PRESSURE IN HPA 878.8 877.3 878.3 874.2 878.8 875.9 876.3 874.8 881.8 884.3 881.0 881.0 874.2 DAY 7 29 2 4 30 30 12 24 4 6 19 29 MEAN QNH PRESSURE IN HPA 1014.5 1013.6 1010.9 1010.2 1012.6 1008.3 1007.2 1005.7 1011.2 1016.6 1017.3 1017.5 1012.1 MAX. QNH PRESSURE IN HPA 1021.3 1022.1 1020.6 1022.8 1019.5 1016.4 1012.4 1012.0 1015.8 1021.2 1023.2 1022.5 1023.2 DAY 18 13 19 7 1 6 29 13 19 27 25 7 MIN. QNH PRESSURE IN HPA 1003.2 1001.5 1002.6 998.1 1003.2 1000.0 1000.4 998.7 1006.5 1009.3 1005.7 1005.7 998.1 DAY 7 29 2 4 30 30 12 24 4 6 19 29 MEAN QFF PRESSURE IN HPA 1018.0 1016.0 1012.9 1009.0 1007.7 1001.9 1000.1 998.3 1005.7 1014.1 1017.7 1021.5 1010.2 MAX. QFF PRESSURE IN HPA 1028.8 1027.7 1025.0 1024.7 1016.6 1012.4 1005.0 1004.4 1011.7 1019.6 1026.8 1026.9 1028.8 DAY 27 10 13 7 1 6 21 13 20 24 25 7 MIN. QFF PRESSURE IN HPA 1006.4 1000.2 1004.1 996.1 996.7 993.1 991.9 990.8 999.8 1005.4 1004.7 1007.6 990.8 DAY 22 21 7 4 30 30 12 24 4 6 18 29 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 889.0 888.4 885.7 885.2 887.9 884.3 882.7 882.0 886.6 891.1 891.7 891.7 887.2 MAX. QFE PRESSURE IN HPA 895.2 895.8 894.8 896.6 893.4 891.2 887.3 887.4 890.9 895.2 897.4 896.6 897.4 DAY 18 13 19 7 1 6 29 10 19 27 25 7 MIN. QFE PRESSURE IN HPA 879.1 877.4 878.8 875.6 880.7 878.8 877.8 876.0 882.4 883.2 880.9 881.3 875.6 DAY 7 21 2 4 30 29 1 23 4 6 18 29 MEAN QNH PRESSURE IN HPA 1014.5 1013.9 1010.9 1010.3 1013.4 1009.3 1007.6 1006.7 1011.8 1016.8 1017.6 1017.6 1012.5 MAX. QNH PRESSURE IN HPA 1021.5 1022.1 1021.0 1023.0 1019.5 1017.0 1012.7 1012.8 1016.7 1021.5 1023.9 1023.0 1023.9 DAY 18 13 19 7 1 6 29 10 19 27 25 7 MIN. QNH PRESSURE IN HPA 1003.5 1001.6 1003.2 999.6 1005.3 1003.2 1002.1 1000.1 1007.2 1008.1 1005.5 1006.0 999.6 DAY 7 21 2 4 30 29 1 23 4 6 18 29 MEAN QFF PRESSURE IN HPA 1017.1 1015.3 1012.0 1008.4 1007.5 1001.9 999.7 998.5 1005.0 1012.8 1017.1 1020.0 1009.6 MAX. QFF PRESSURE IN HPA 1027.6 1027.0 1024.0 1024.1 1015.5 1012.0 1005.7 1004.6 1011.9 1018.4 1026.7 1025.6 1027.6 DAY 27 10 19 7 1 6 21 30 20 22 25 7 MIN. QFF PRESSURE IN HPA 1003.7 999.6 1003.0 997.7 997.5 995.7 994.1 991.1 999.2 1003.3 1003.8 1007.7 991.1 DAY 22 21 5 4 30 29 12 23 4 6 18 29 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.8 1.1 4.1 12.0 18.0 22.8 26.2 24.8 18.4 12.5 7.4 2.5 12.4 MINIMUN AIR TEMPERATURE (C) -4.5 -4.7 -1.3 0.7 8.6 13.3 16.5 15.8 9.2 3.8 -0.2 -2.9 4.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 20 15 11 5 0 0 0 0 0 0 8 11 70 DAYS WITH FREEZING MIN.<= 0 27 27 20 12 0 0 0 0 0 7 17 28 138 TEMPERATURE RECORDS LOWEST(C) -12.0 -11.0 -12.0 -8.0 5.0 8.0 13.0 12.0 5.0 -1.0 -9.0 -8.0 -12.0 DAY 14 1 4 17 1 8 18 10 27 25 24 30 MAXIMUM AIR TEMPERATURE (C) 3.6 7.3 10.3 19.2 26.9 32.6 35.8 34.5 27.6 21.9 15.0 9.9 20.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 9 23 30 30 6 0 0 0 98 DAYS WITH MAXIMUM TEMP. <= 0 9 1 0 0 0 0 0 0 0 0 0 0 10 TEMPERATURE RECORDS HIGHEST(C) 13.0 12.0 20.0 29.0 33.0 39.0 39.0 41.0 33.0 28.0 20.0 17.0 41.0 DAY 20 7 24 26 22 25 20 19 11 14 2 3 DIF. BETWEEN (MAX.-MIN.) (C) 8.1 12.0 11.6 18.5 18.3 19.3 19.3 18.7 18.4 18.1 15.2 12.8 15.9 MEAN DAILY TEMP. (MDT) (C) -0.5 1.3 4.5 9.9 17.8 23.0 26.2 25.2 18.4 12.8 7.4 3.5 12.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.5 81.0 160.0 129.5 1.5 0.0 0.0 0.0 373.5 HEATING DEG. DAYS(BASE 18 0C) 572.0 468.0 418.0 241.5 35.0 3.5 0.0 0.0 16.0 160.5 318.0 450.5 2683.0 DEWPOINT (MEAN C) -5.3 -3.3 -2.4 2.8 8.2 10.3 13.9 10.3 6.6 4.7 0.2 -1.7 3.7 MIXING RATIO (G/KG) 3.01 3.49 3.80 5.52 7.89 9.23 11.61 9.17 7.03 6.15 4.66 3.90 6.29 VAPOUR PRESSURE (HPA) 4.28 4.95 5.36 7.77 11.08 12.90 16.11 12.81 9.87 8.71 6.60 5.52 8.83 SATURATION DEF. (HPA) 1.73 1.98 3.64 7.16 11.07 17.51 20.13 20.55 12.85 6.90 4.69 2.25 9.21 RELATIVE HUMIDITY (MEAN %) 74 76 67 58 59 52 51 44 50 63 63 76 61 RELATIVE HUMIDITY (MAX. %) 89 96 89 83 92 88 84 70 78 85 82 92 86 RELATIVE HUMIDITY (MIN. %) 57 53 41 36 29 25 29 24 28 38 40 53 38 RELATIVE HUMIDITY (MEAN% 03UTC) 84 91 84 81 90 86 83 69 78 83 80 90 83 RELATIVE HUMIDITY (MEAN% 09UTC) 66 65 54 43 37 35 41 34 38 49 49 64 48 RELATIVE HUMIDITY (MEAN% 15UTC) 66 58 49 42 38 28 29 26 29 46 50 61 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 8.7 33.4 12.6 37.6 26.0 8.4 0.1 0.0 0.0 3.9 4.2 13.2 148.1 DAYS WITH PRECIPITATION >=10 0 2 0 1 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 5 1 3 1 3 3 1 0 0 0 0 0 2 14 DAYS WITH PRECIPITATION >= 1 3 5 3 8 8 3 0 0 0 2 1 4 37 DAYS WITH PRECIPITATION 8 8 8 16 18 7 1 4 0 5 5 8 88 GREATEST DAILY PRECIPITATION 6.0 13.0 8.0 10.0 6.0 6.0 0.1 0.0 0.0 2.0 3.0 5.3 13.0 DAY 3 27 8 25 9 1 1 ** ** 20 21 14 DAY WITH THUNDER STORM 0 0 1 6 11 2 0 1 0 0 0 0 21 DAYS WITH SNOW OR SLEET 4 6 4 0 0 0 0 0 0 0 0 1 15 DAYS WITH DUST 0 0 1 0 1 0 0 0 1 0 0 0 3 WIND DIRECTION (PREVAILING) 180 225 225 180 180 180 90 90 90 90 225 225 90 PREVAILING WIND SPEED(KNOTS) 7.8 7.5 6.3 9.3 7.9 7.1 5.0 6.8 6.2 6.5 6.4 5.7 6.1 PREVAILING WIND PERCENT 10.9 9.5 11.3 13.8 13.0 9.2 10.9 16.2 20.9 13.4 6.7 5.2 9.0 CALMS PERCENT OF WIND 68.0 73.0 63.6 57.7 64.4 75.3 75.0 64.4 59.8 70.0 73.2 79.4 68.6 NO. OF WIND OBSERVATION 247 222 247 239 247 239 248 247 239 247 239 248 2909 VECTOR WIND DIRECTION (MEAN) 205 232 185 173 179 153 82 112 97 99 206 188 158 VECTOR WIND MAGNITUDE(KNOTS) 1.4 0.5 1.2 1.4 1.3 0.7 0.6 1.0 1.2 1.2 0.7 0.4 0.7 WIND STEADINESES (MEAN %) 56.0 33.3 50.0 43.7 52.0 46.7 46.2 41.7 48.0 66.7 38.9 36.4 35.0 WIND SPEED (MEAN KNOTS) 2.5 1.5 2.4 3.2 2.5 1.5 1.3 2.4 2.5 1.8 1.8 1.1 2.0 FASTEST WIND DIRECTION 210 230 210 170 170 230 190 190 260 130 180 230 210 FASTEST WIND SPEED (KNOTS) 28 12 20 18 14 13 13 13 16 11 22 11 28 DAY 26 14 25 12 6 10 24 24 18 13 22 9 DAYS WITH SKY CLEAR (0-2)/8 9 15 15 7 16 23 31 28 27 25 18 15 229 DAYS WITH P.CLOUDY (3-6)/8 7 3 9 15 13 7 0 3 3 6 8 12 86 DAYS WITH CLOUDY (7-8)/8 14 10 7 8 2 0 0 0 0 0 4 4 49 DAYS WITH VISIBILITY =< 2 KM 4 0 0 0 1 0 0 0 0 0 1 0 6 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 889.6 887.5 885.3 885.2 884.2 882.6 879.6 882.2 883.5 889.3 888.5 887.1 885.4 MAX. QFE PRESSURE IN HPA 899.0 898.2 899.8 893.2 893.1 888.9 885.6 889.6 890.6 896.0 894.9 896.8 899.8 DAY-HOUR 8- 9 22- 6 3-18 17- 6 14- 6 20- 6 16- 6 9- 6 7- 6 25- 9 29- 9 6- 9 MIN. QFE PRESSURE IN HPA 874.9 881.3 874.2 876.4 874.8 874.3 872.7 876.4 874.7 881.9 871.4 871.8 871.4 DAY-HOUR 20-12 13-15 16-15 13-15 27-15 25-18 11-15 31-15 11-18 16-12 22- 9 22-15 MEAN QNH PRESSURE IN HPA 1015.2 1012.9 1010.4 1010.3 1009.2 1007.4 1004.1 1007.0 1008.4 1014.9 1014.0 1012.4 1010.5 MAX. QNH PRESSURE IN HPA 1025.7 1024.8 1026.6 1019.2 1019.1 1014.4 1010.8 1015.2 1016.3 1022.3 1021.1 1023.2 1026.6 DAY-HOUR 8- 9 22- 6 3-18 17- 6 14- 6 20- 6 16- 6 9- 6 7- 6 25- 9 29- 9 6- 9 MIN. QNH PRESSURE IN HPA 998.9 1006.0 998.1 1000.5 998.7 998.2 996.4 1000.5 998.6 1006.6 995.0 995.4 995.0 DAY-HOUR 20-12 13-15 16-15 13-15 27-15 25-18 11-15 31-15 11-18 16-12 22- 9 22-15 MEAN QFF PRESSURE IN HPA 1019.4 1016.0 1012.1 1008.1 1004.1 1000.2 995.1 998.9 1003.1 1012.5 1014.0 1014.8 1008.2 MAX. QFF PRESSURE IN HPA 1031.1 1029.9 1034.6 1020.8 1014.5 1007.3 1002.7 1008.1 1012.0 1021.7 1026.0 1027.0 1034.6 DAY-HOUR 8- 9 21- 6 3-18 17- 6 1- 6 20- 6 16- 6 9- 6 7- 6 25- 6 29- 6 6- 6 MIN. QFF PRESSURE IN HPA 998.0 1008.1 997.5 998.0 992.4 989.3 987.6 991.9 991.8 1002.8 993.0 996.3 987.6 DAY-HOUR 20-12 13-12 30-15 13- 9 27-12 25-18 11-12 19-21 11-18 16-12 22- 9 22-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 889.6 887.6 885.4 885.3 884.6 882.8 879.5 882.1 883.3 889.3 888.6 887.2 885.4 MAX. QFE PRESSURE IN HPA 898.0 897.8 898.9 892.2 891.6 887.8 884.2 886.1 888.6 893.3 894.2 895.9 898.9 DAY 9 22 4 17 14 21 16 9 15 26 29 3 MIN. QFE PRESSURE IN HPA 876.6 882.2 877.2 878.1 878.3 876.4 877.0 878.4 876.4 884.4 873.8 875.0 873.8 DAY 21 14 31 13 31 14 28 20 12 16 22 22 MEAN QNH PRESSURE IN HPA 1015.3 1013.0 1010.6 1010.4 1009.7 1007.6 1004.0 1006.9 1008.2 1014.9 1014.1 1012.6 1010.6 MAX. QNH PRESSURE IN HPA 1024.6 1024.3 1025.6 1018.1 1017.5 1013.2 1009.2 1011.3 1014.1 1019.3 1020.3 1022.2 1025.6 DAY 9 22 4 17 14 21 16 9 15 26 29 3 MIN. QNH PRESSURE IN HPA 1000.7 1007.0 1001.4 1002.4 1002.6 1000.5 1001.2 1002.8 1000.5 1009.4 997.6 999.0 997.6 DAY 21 14 31 13 31 14 28 20 12 16 22 22 MEAN QFF PRESSURE IN HPA 1019.0 1015.5 1011.9 1007.9 1004.3 1000.1 994.7 998.2 1002.3 1011.8 1013.5 1014.3 1007.8 MAX. QFF PRESSURE IN HPA 1029.7 1027.5 1031.2 1019.2 1013.0 1005.0 1000.8 1003.7 1007.9 1018.7 1023.4 1022.4 1031.2 DAY 9 22 4 17 1 9 16 9 7 26 29 7 MIN. QFF PRESSURE IN HPA 1000.2 1008.3 998.6 998.5 996.7 992.0 991.6 992.4 993.3 1005.9 995.1 1000.2 991.6 DAY 21 14 31 13 28 26 29 20 12 15 22 23 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 889.7 887.7 885.8 885.5 884.8 883.0 880.5 883.0 884.1 889.7 888.8 887.3 885.8 MAX. QFE PRESSURE IN HPA 897.8 897.8 898.6 892.8 892.3 888.1 885.1 887.3 889.3 894.2 894.4 895.9 898.6 DAY 9 22 4 17 14 21 24 9 7 25 29 3 MIN. QFE PRESSURE IN HPA 877.0 882.6 877.5 877.7 878.3 876.6 877.3 879.9 877.4 885.0 872.8 875.1 872.8 DAY 21 14 31 13 31 14 11 19 12 15 22 22 MEAN QNH PRESSURE IN HPA 1015.3 1013.2 1011.0 1010.7 1009.9 1007.9 1005.0 1007.8 1009.1 1015.3 1014.4 1012.7 1011.0 MAX. QNH PRESSURE IN HPA 1024.3 1024.3 1025.2 1018.8 1018.2 1013.6 1010.2 1012.7 1014.9 1020.3 1020.6 1022.2 1025.2 DAY 9 22 4 17 14 21 24 9 7 25 29 3 MIN. QNH PRESSURE IN HPA 1001.2 1007.4 1001.8 1002.0 1002.6 1000.7 1001.5 1004.4 1001.6 1010.1 996.5 999.1 996.5 DAY 21 14 31 13 31 14 11 19 12 15 22 22 MEAN QFF PRESSURE IN HPA 1019.6 1016.4 1012.9 1008.8 1005.4 1001.1 996.3 999.9 1004.0 1013.4 1014.8 1015.1 1009.0 MAX. QFF PRESSURE IN HPA 1029.9 1028.4 1031.7 1020.2 1014.1 1006.5 1002.2 1005.4 1010.0 1020.6 1024.8 1023.9 1031.7 DAY 9 22 4 17 1 9 16 9 15 25 29 6 MIN. QFF PRESSURE IN HPA 1001.4 1008.8 999.0 998.7 997.2 993.2 992.6 995.0 995.4 1006.4 994.6 1000.6 992.6 DAY 21 8 31 13 27 26 29 20 12 15 22 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 890.0 888.1 886.2 886.1 885.4 883.7 881.4 884.5 885.3 890.3 889.2 887.6 886.5 MAX. QFE PRESSURE IN HPA 898.1 898.2 898.9 893.2 893.1 888.9 885.6 889.6 890.6 895.4 894.4 896.1 898.9 DAY 8 22 4 17 14 20 16 9 7 25 29 3 MIN. QFE PRESSURE IN HPA 876.4 882.6 878.1 877.3 877.2 876.7 877.5 880.4 878.2 884.4 872.0 874.7 872.0 DAY 20 8 31 13 27 14 11 19 21 15 22 22 MEAN QNH PRESSURE IN HPA 1015.6 1013.5 1011.4 1011.4 1010.6 1008.6 1006.1 1009.5 1010.5 1016.0 1014.8 1013.0 1011.7 MAX. QNH PRESSURE IN HPA 1024.7 1024.8 1025.6 1019.2 1019.1 1014.4 1010.8 1015.2 1016.3 1021.7 1020.6 1022.5 1025.6 DAY 8 22 4 17 14 20 16 9 7 25 29 3 MIN. QNH PRESSURE IN HPA 1000.5 1007.4 1002.4 1001.5 1001.4 1000.9 1001.8 1005.0 1002.5 1009.4 995.6 998.6 995.6 DAY 20 8 31 13 27 14 11 19 21 15 22 22 MEAN QFF PRESSURE IN HPA 1020.5 1017.6 1013.6 1009.6 1005.9 1001.8 997.6 1002.0 1005.9 1014.5 1015.8 1016.3 1010.1 MAX. QFF PRESSURE IN HPA 1030.3 1029.9 1033.3 1020.8 1014.5 1007.3 1002.7 1008.1 1012.0 1021.7 1026.0 1027.0 1033.3 DAY 8 21 4 17 1 20 16 9 7 25 29 6 MIN. QFF PRESSURE IN HPA 1001.4 1008.8 1000.7 998.7 995.2 992.7 992.4 996.7 996.7 1006.2 994.2 999.9 992.4 DAY 20 8 31 13 27 25 29 19 12 15 22 14 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 890.1 888.3 886.0 885.8 884.7 883.1 881.0 883.6 885.0 890.5 889.4 887.8 886.3 MAX. QFE PRESSURE IN HPA 899.0 898.1 898.1 892.9 893.1 888.3 884.7 888.2 889.9 896.0 894.9 896.8 899.0 DAY 8 22 4 17 14 20 24 9 7 25 29 6 MIN. QFE PRESSURE IN HPA 875.9 882.4 878.2 876.9 876.1 876.6 876.6 879.8 878.0 884.1 871.4 874.3 871.4 DAY 20 8 31 13 27 14 11 19 21 15 22 22 MEAN QNH PRESSURE IN HPA 1015.8 1013.8 1011.3 1011.0 1009.8 1008.0 1005.6 1008.5 1010.1 1016.3 1015.0 1013.2 1011.5 MAX. QNH PRESSURE IN HPA 1025.7 1024.7 1024.7 1018.9 1019.1 1013.8 1009.8 1013.7 1015.6 1022.3 1021.1 1023.2 1025.7 DAY 8 22 4 17 14 20 24 9 7 25 29 6 MIN. QNH PRESSURE IN HPA 1000.0 1007.2 1002.5 1001.1 1000.2 1000.7 1000.7 1004.3 1002.3 1009.1 995.0 998.2 995.0 DAY 20 8 31 13 27 14 11 19 21 15 22 22 MEAN QFF PRESSURE IN HPA 1019.6 1016.6 1012.3 1008.5 1004.0 1000.5 996.5 1000.2 1004.7 1013.4 1014.2 1015.2 1008.8 MAX. QFF PRESSURE IN HPA 1031.1 1028.0 1030.1 1019.2 1012.8 1005.4 1001.1 1006.8 1010.2 1020.8 1024.7 1025.5 1031.1 DAY 8 22 4 17 14 20 16 9 27 25 29 6 MIN. QFF PRESSURE IN HPA 999.8 1008.8 1000.7 998.0 993.7 992.2 991.7 995.1 994.7 1005.4 993.0 999.3 991.7 DAY 20 8 25 13 27 25 11 19 12 15 22 22 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 889.1 886.9 884.9 884.6 883.4 882.4 879.3 882.0 883.2 889.0 888.3 886.6 885.0 MAX. QFE PRESSURE IN HPA 898.2 896.2 899.2 891.8 891.8 887.7 883.4 887.0 888.3 894.1 893.7 894.4 899.2 DAY 8 22 3 17 14 20 15 9 24 25 2 6 MIN. QFE PRESSURE IN HPA 874.9 881.5 876.1 876.8 875.2 875.4 873.2 878.0 875.1 881.9 871.4 873.8 871.4 DAY 20 13 16 13 27 25 11 6 21 16 22 22 MEAN QNH PRESSURE IN HPA 1014.7 1012.2 1010.0 1009.6 1008.3 1007.2 1003.8 1006.8 1008.1 1014.5 1013.7 1011.8 1010.1 MAX. QNH PRESSURE IN HPA 1024.8 1022.6 1025.9 1017.7 1017.7 1013.1 1008.3 1012.3 1013.8 1020.2 1019.8 1020.6 1025.9 DAY 8 22 3 17 14 20 15 9 24 25 2 6 MIN. QNH PRESSURE IN HPA 998.9 1006.2 1000.2 1001.0 999.2 999.4 997.0 1002.3 999.1 1006.6 995.0 997.6 995.0 DAY 20 13 16 13 27 25 11 6 21 16 22 22 MEAN QFF PRESSURE IN HPA 1018.5 1014.7 1011.2 1007.1 1002.9 999.5 994.4 998.1 1002.2 1011.3 1013.1 1013.5 1007.2 MAX. QFF PRESSURE IN HPA 1030.1 1025.4 1031.7 1017.3 1011.5 1004.9 1000.0 1004.4 1008.4 1019.3 1022.3 1022.7 1031.7 DAY 8 22 3 17 14 20 15 9 30 25 28 6 MIN. QFF PRESSURE IN HPA 998.0 1008.1 998.0 999.0 992.4 989.5 987.6 992.8 992.6 1002.8 993.3 998.9 987.6 DAY 20 13 30 13 27 25 11 6 21 16 22 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 889.3 886.6 884.2 883.9 882.7 881.7 878.0 880.7 882.0 888.2 887.8 886.4 884.3 MAX. QFE PRESSURE IN HPA 898.0 895.3 898.9 890.2 890.4 887.1 882.8 884.4 886.4 892.8 893.2 894.2 898.9 DAY 8 21 3 17 14 21 15 9 7 25 28 5 MIN. QFE PRESSURE IN HPA 875.8 881.3 874.2 876.4 874.8 874.5 872.7 876.4 874.9 882.7 872.5 871.8 871.8 DAY 20 13 16 13 27 25 11 31 21 16 22 22 MEAN QNH PRESSURE IN HPA 1014.9 1011.9 1009.2 1008.8 1007.5 1006.4 1002.3 1005.3 1006.8 1013.7 1013.2 1011.7 1009.3 MAX. QNH PRESSURE IN HPA 1024.6 1021.6 1025.6 1015.9 1016.1 1012.4 1007.7 1009.4 1011.7 1018.8 1019.2 1020.3 1025.6 DAY 8 21 3 17 14 21 15 9 7 25 28 5 MIN. QNH PRESSURE IN HPA 999.9 1006.0 998.1 1000.5 998.7 998.4 996.4 1000.5 998.9 1007.5 996.2 995.4 995.4 DAY 20 13 16 13 27 25 11 31 21 16 22 22 MEAN QFF PRESSURE IN HPA 1019.2 1015.2 1011.0 1006.9 1002.9 999.5 993.6 997.4 1001.7 1011.7 1013.6 1014.1 1007.2 MAX. QFF PRESSURE IN HPA 1030.1 1025.6 1032.4 1016.0 1010.2 1004.7 999.8 1001.8 1007.2 1019.2 1023.2 1023.0 1032.4 DAY 8 21 3 17 14 16 15 9 30 25 28 6 MIN. QFF PRESSURE IN HPA 1000.0 1008.3 997.5 998.3 992.8 989.5 988.3 992.4 993.0 1004.2 995.6 996.3 988.3 DAY 20 8 30 13 27 30 11 6 21 15 22 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 889.6 887.3 884.8 885.3 883.7 881.8 878.2 880.6 882.1 888.7 888.1 886.7 884.7 MAX. QFE PRESSURE IN HPA 898.0 897.0 899.8 891.6 891.0 887.8 883.1 885.0 886.3 893.0 893.5 894.4 899.8 DAY 8 21 3 16 14 20 15 9 30 25 28 5 MIN. QFE PRESSURE IN HPA 877.0 881.7 874.8 878.9 877.1 874.3 875.5 876.8 874.7 883.3 874.6 872.7 872.7 DAY 20 13 16 12 27 25 11 6 11 3 21 22 MEAN QNH PRESSURE IN HPA 1015.2 1012.7 1009.8 1010.4 1008.6 1006.6 1002.6 1005.2 1006.9 1014.2 1013.5 1012.0 1009.8 MAX. QNH PRESSURE IN HPA 1024.6 1023.5 1026.6 1017.5 1016.8 1013.2 1008.0 1010.1 1011.5 1019.0 1019.6 1020.6 1026.6 DAY 8 21 3 16 14 20 15 9 30 25 28 5 MIN. QNH PRESSURE IN HPA 1001.2 1006.4 998.7 1003.3 1001.3 998.2 999.5 1001.0 998.6 1008.2 998.5 996.4 996.4 DAY 20 13 16 12 27 25 11 6 11 3 21 22 MEAN QFF PRESSURE IN HPA 1020.1 1016.6 1012.2 1008.5 1003.8 999.6 994.0 997.7 1002.5 1012.7 1014.5 1015.3 1008.1 MAX. QFF PRESSURE IN HPA 1030.0 1028.7 1034.6 1018.7 1011.3 1006.1 1000.2 1003.5 1009.1 1019.2 1025.1 1024.8 1034.6 DAY 8 21 3 16 1 20 15 9 24 25 28 5 MIN. QFF PRESSURE IN HPA 1002.0 1009.1 998.9 1000.1 995.4 989.3 990.9 992.6 991.8 1005.6 996.8 997.5 989.3 DAY 20 13 16 12 27 25 26 6 11 3 21 22 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 889.5 887.5 885.1 885.4 884.3 882.4 878.8 881.4 882.8 889.0 888.1 886.9 885.1 MAX. QFE PRESSURE IN HPA 898.0 897.4 899.4 891.8 891.3 887.8 883.7 885.3 887.9 893.0 894.0 895.4 899.4 DAY 8 21 3 16 14 20 15 8 14 25 28 6 MIN. QFE PRESSURE IN HPA 876.6 882.0 875.6 878.5 878.3 875.7 876.1 877.4 875.7 884.5 874.3 873.2 873.2 DAY 20 13 16 12 27 25 27 19 11 15 21 22 MEAN QNH PRESSURE IN HPA 1015.1 1012.8 1010.3 1010.5 1009.4 1007.3 1003.2 1006.1 1007.7 1014.6 1013.6 1012.2 1010.2 MAX. QNH PRESSURE IN HPA 1024.6 1023.9 1026.1 1017.7 1017.1 1013.2 1008.7 1010.4 1013.3 1019.0 1020.1 1021.7 1026.1 DAY 8 21 3 16 14 20 15 8 14 25 28 6 MIN. QNH PRESSURE IN HPA 1000.7 1006.8 999.6 1002.9 1002.6 999.7 1000.2 1001.6 999.7 1009.5 998.2 997.0 997.0 DAY 20 13 16 12 27 25 27 19 11 15 21 22 MEAN QFF PRESSURE IN HPA 1018.9 1015.6 1011.6 1007.8 1003.7 999.8 994.2 997.8 1002.1 1011.6 1012.9 1014.4 1007.5 MAX. QFF PRESSURE IN HPA 1029.8 1027.4 1031.9 1018.7 1011.4 1005.5 1000.5 1003.9 1007.2 1017.9 1023.6 1023.7 1031.9 DAY 8 21 3 16 10 20 15 8 24 25 28 6 MIN. QFF PRESSURE IN HPA 1000.6 1009.0 999.1 998.9 995.9 990.5 991.2 991.9 992.3 1006.4 996.3 997.1 990.5 DAY 20 13 30 12 27 25 27 19 11 15 21 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.3 2.0 10.1 10.8 17.4 21.3 29.2 27.0 21.6 14.5 8.0 4.6 13.4 MINIMUN AIR TEMPERATURE (C) -10.4 -3.8 1.6 4.9 8.7 11.9 17.1 15.6 9.9 6.1 1.1 -1.9 5.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 31 15 2 0 0 0 0 0 0 0 1 8 57 DAYS WITH FREEZING MIN.<= 0 31 27 12 2 0 0 0 0 0 2 15 28 117 TEMPERATURE RECORDS LOWEST(C) -20.0 -9.0 -4.0 0.0 5.0 6.0 15.0 13.0 6.0 0.0 -4.0 -5.0 -20.0 DAY 7 2 1 6 1 10 1 24 19 23 30 1 MAXIMUM AIR TEMPERATURE (C) -0.4 8.3 18.7 18.0 26.2 31.2 36.9 34.3 29.4 20.9 13.0 9.4 20.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 5 20 31 28 14 4 0 0 102 DAYS WITH MAXIMUM TEMP. <= 0 20 0 0 0 0 0 0 0 0 0 0 0 20 TEMPERATURE RECORDS HIGHEST(C) 11.0 15.0 26.0 26.0 33.0 36.0 42.0 39.0 36.0 32.0 21.0 15.0 42.0 DAY 4 16 27 8 17 13 22 1 2 1 3 20 DIF. BETWEEN (MAX.-MIN.) (C) 10.0 12.1 17.1 13.1 17.5 19.3 19.8 18.7 19.5 14.8 11.9 11.3 15.4 MEAN DAILY TEMP. (MDT) (C) -5.4 2.2 10.2 11.5 17.4 21.6 27.0 25.0 19.7 13.5 7.0 3.8 12.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.0 42.0 187.0 123.5 25.5 0.5 0.0 0.0 379.5 HEATING DEG. DAYS(BASE 18 0C) 724.5 442.0 242.0 196.0 40.0 4.0 0.0 0.0 16.5 151.0 329.0 441.5 2586.5 DEWPOINT (MEAN C) -6.7 -2.9 1.9 7.1 10.2 11.5 12.1 12.6 7.0 5.8 4.5 1.1 5.4 MIXING RATIO (G/KG) 2.68 3.56 5.16 7.31 9.00 9.98 10.38 10.64 7.34 6.69 6.12 4.71 6.96 VAPOUR PRESSURE (HPA) 3.82 5.04 7.27 10.27 12.61 13.94 14.47 14.87 10.33 9.50 8.74 6.71 9.80 SATURATION DEF. (HPA) 0.50 2.38 6.18 3.33 8.65 13.33 28.95 23.11 17.97 8.64 2.58 2.19 9.82 RELATIVE HUMIDITY (MEAN %) 90 73 62 82 68 60 40 46 46 63 80 79 66 RELATIVE HUMIDITY (MAX. %) 96 94 90 99 97 94 70 80 83 89 95 92 90 RELATIVE HUMIDITY (MIN. %) 79 52 34 56 37 30 23 27 23 41 65 67 45 RELATIVE HUMIDITY (MEAN% 03UTC) 94 90 84 96 95 92 70 80 82 89 94 92 88 RELATIVE HUMIDITY (MEAN% 09UTC) 89 62 47 71 47 41 31 38 34 57 78 77 56 RELATIVE HUMIDITY (MEAN% 15UTC) 85 58 41 62 41 32 24 29 26 47 71 72 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 12.6 8.1 3.8 82.3 18.4 13.5 29.0 8.2 14.0 55.5 21.0 17.0 283.4 DAYS WITH PRECIPITATION >=10 0 0 0 3 1 0 1 0 1 3 0 0 9 DAYS WITH PRECIPITATION >= 5 1 0 0 5 1 1 2 1 1 4 2 1 19 DAYS WITH PRECIPITATION >= 1 3 3 2 16 4 4 3 2 1 8 6 4 56 DAYS WITH PRECIPITATION 9 9 5 25 11 9 5 6 2 16 7 8 112 GREATEST DAILY PRECIPITATION 8.0 3.0 2.0 17.0 12.0 7.0 22.0 7.0 14.0 14.0 8.0 8.0 22.0 DAY 5 5 28 5 27 9 13 7 17 22 6 23 DAY WITH THUNDER STORM 0 0 1 0 6 2 0 1 0 1 0 0 11 DAYS WITH SNOW OR SLEET 11 7 2 1 0 0 0 0 0 0 0 2 23 DAYS WITH DUST 0 0 0 1 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 90 90 180 45 90 90 90 90 90 180 360 180 90 PREVAILING WIND SPEED(KNOTS) 7.2 8.1 6.6 5.4 5.6 6.7 4.8 5.4 7.1 5.3 5.8 15.8 6.3 PREVAILING WIND PERCENT 5.3 12.1 6.5 6.7 8.1 13.0 16.0 18.1 19.3 5.9 9.9 20.6 9.2 CALMS PERCENT OF WIND 90.2 79.8 76.9 81.2 73.7 77.8 71.2 66.5 72.0 73.2 65.6 55.5 75.0 NO. OF WIND OBSERVATION 246 223 247 239 247 239 156 155 150 153 151 155 2361 VECTOR WIND DIRECTION (MEAN) 125 100 171 107 161 95 118 115 86 167 356 172 129 VECTOR WIND MAGNITUDE(KNOTS) 0.4 1.3 0.8 0.5 0.8 0.7 0.8 1.2 1.5 0.4 0.6 3.0 0.7 WIND STEADINESES (MEAN %) 50.0 72.2 50.0 35.7 47.1 46.7 53.3 70.6 88.2 26.7 40.0 60.0 38.9 WIND SPEED (MEAN KNOTS) 0.8 1.8 1.6 1.4 1.7 1.5 1.5 1.7 1.7 1.5 1.5 5.0 1.8 FASTEST WIND DIRECTION 180 180 220 90 180 90 80 180 90 180 70 180 180 FASTEST WIND SPEED (KNOTS) 20 22 18 22 24 25 10 16 20 13 15 32 32 DAY 4 19 24 10 8 7 17 21 12 13 5 19 DAYS WITH SKY CLEAR (0-2)/8 4 12 21 7 24 26 30 29 27 17 19 11 227 DAYS WITH P.CLOUDY (3-6)/8 6 8 9 10 7 4 1 2 3 11 4 12 77 DAYS WITH CLOUDY (7-8)/8 13 8 1 13 0 0 0 0 0 3 7 8 53 DAYS WITH VISIBILITY =< 2 KM 18 2 0 1 1 1 0 0 0 2 1 0 26 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 891.2 885.7 885.0 883.8 884.5 883.6 882.1 884.9 886.9 893.0 899.1 894.2 887.8 MAX. QFE PRESSURE IN HPA 902.6 896.8 894.0 892.5 891.2 890.3 886.7 891.7 894.9 903.0 907.5 902.5 907.5 DAY-HOUR 18- 6 10-21 3- 9 19- 6 16- 9 1- 9 7- 3 26- 6 25- 9 28- 9 23- 6 1- 6 MIN. QFE PRESSURE IN HPA 874.0 868.1 870.2 876.2 877.0 875.2 877.2 876.2 876.1 881.0 891.0 883.6 868.1 DAY-HOUR 4-15 20-15 27-21 4-15 5-12 8-15 21-15 22-15 11-12 10- 3 6- 3 16-15 MEAN QNH PRESSURE IN HPA 1017.0 1010.9 1010.1 1008.7 1009.5 1008.6 1006.9 1010.0 1012.2 1019.0 1025.8 1020.3 1013.2 MAX. QNH PRESSURE IN HPA 1029.7 1023.2 1020.1 1018.4 1017.0 1016.0 1012.0 1017.6 1021.1 1030.1 1035.1 1029.6 1035.1 DAY-HOUR 18- 6 10-21 3- 9 19- 6 16- 9 1- 9 7- 3 26- 6 25- 9 28- 9 23- 6 1- 6 MIN. QNH PRESSURE IN HPA 997.9 991.3 993.6 1000.3 1001.2 999.2 1001.4 1000.3 1000.2 1005.7 1016.8 1008.5 991.3 DAY-HOUR 4-15 20-15 27-21 4-15 5-12 8-15 21-15 22-15 11-12 10- 3 6- 3 16-15 MEAN QFF PRESSURE IN HPA 1023.6 1013.5 1008.8 1006.8 1004.6 1001.9 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1037.7 1028.8 1021.1 1017.5 1012.7 1011.1 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 24- 6 11- 6 6- 6 12- 6 16- 6 17- 6 **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1000.0 991.0 988.8 997.7 994.8 992.1 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 4-15 20-15 28- 0 26-15 5-12 8-12 **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 891.1 886.1 885.1 883.7 884.3 883.8 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 902.6 896.8 893.1 891.0 890.1 888.9 ****** ****** ****** ****** ****** ****** ****** DAY 19 11 7 19 16 18 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 875.7 871.3 870.6 877.3 878.4 876.0 ****** ****** ****** ****** ****** ****** ****** DAY 5 21 28 5 9 8 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1016.9 1011.3 1010.2 1008.7 1009.3 1008.8 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1029.7 1023.2 1019.1 1016.8 1015.8 1014.4 ****** ****** ****** ****** ****** ****** ****** DAY 19 11 7 19 16 18 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 999.7 994.8 994.1 1001.5 1002.8 1000.1 ****** ****** ****** ****** ****** ****** ****** DAY 5 21 28 5 9 8 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1023.2 1013.6 1008.3 1006.5 1004.0 1001.7 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1036.0 1027.2 1018.1 1015.2 1011.0 1009.1 ****** ****** ****** ****** ****** ****** ****** DAY 19 11 3 19 16 18 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1001.1 996.4 988.8 1000.2 996.1 992.4 ****** ****** ****** ****** ****** ****** ****** DAY 5 21 28 10 9 8 ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 891.4 886.2 885.6 884.1 884.8 884.5 882.7 885.3 887.2 893.5 899.2 894.4 888.2 MAX. QFE PRESSURE IN HPA 902.6 896.8 893.4 891.7 890.1 889.1 886.7 891.5 893.0 902.7 907.0 902.0 907.0 DAY 19 11 6 19 16 18 7 26 26 28 23 1 MIN. QFE PRESSURE IN HPA 877.0 873.8 871.0 877.6 878.4 877.0 878.9 878.6 878.7 881.0 891.0 884.8 871.0 DAY 5 21 28 5 9 8 22 2 11 10 6 17 MEAN QNH PRESSURE IN HPA 1017.2 1011.5 1010.7 1009.1 1009.9 1009.5 1007.5 1010.4 1012.6 1019.5 1025.9 1020.5 1013.7 MAX. QNH PRESSURE IN HPA 1029.7 1023.2 1019.5 1017.6 1015.8 1014.7 1012.0 1017.3 1019.0 1029.8 1034.6 1029.0 1034.6 DAY 19 11 6 19 16 18 7 26 26 28 23 1 MIN. QNH PRESSURE IN HPA 1001.2 997.6 994.5 1001.9 1002.8 1001.2 1003.3 1003.0 1003.1 1005.7 1016.8 1009.9 994.5 DAY 5 21 28 5 9 8 22 2 11 10 6 17 MEAN QFF PRESSURE IN HPA 1023.8 1014.2 1009.7 1007.3 1005.4 1003.1 998.5 1002.5 1007.0 1016.9 1026.4 1022.8 1011.5 MAX. QFF PRESSURE IN HPA 1036.0 1028.3 1019.5 1015.9 1011.9 1010.2 1002.8 1009.9 1014.4 1028.0 1035.9 1033.6 1036.0 DAY 24 11 3 19 16 18 7 25 26 28 23 1 MIN. QFF PRESSURE IN HPA 1002.8 997.8 991.5 1000.1 997.1 994.7 992.9 993.3 995.7 1001.9 1014.9 1012.2 991.5 DAY 5 20 28 10 9 8 22 2 11 10 6 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 891.8 886.4 886.1 884.7 885.7 885.1 883.0 885.8 887.7 893.7 899.7 895.0 888.7 MAX. QFE PRESSURE IN HPA 902.6 896.8 893.7 892.5 891.0 889.8 886.7 891.7 893.0 902.5 907.5 902.5 907.5 DAY 18 11 6 19 14 2 7 26 26 28 23 1 MIN. QFE PRESSURE IN HPA 878.6 872.3 871.3 878.2 878.4 878.2 879.4 878.9 878.7 881.0 891.3 886.0 871.3 DAY 5 20 28 5 9 8 16 22 11 10 6 17 MEAN QNH PRESSURE IN HPA 1017.7 1011.6 1011.3 1009.7 1010.9 1010.2 1007.9 1011.0 1013.1 1019.8 1026.5 1021.2 1014.2 MAX. QNH PRESSURE IN HPA 1029.7 1023.2 1019.8 1018.4 1016.8 1015.4 1012.0 1017.6 1019.0 1029.6 1035.1 1029.6 1035.1 DAY 18 11 6 19 14 2 7 26 26 28 23 1 MIN. QNH PRESSURE IN HPA 1003.0 996.0 994.8 1002.5 1002.8 1002.5 1003.9 1003.3 1003.1 1005.7 1017.1 1011.2 994.8 DAY 5 20 28 5 9 8 16 22 11 10 6 17 MEAN QFF PRESSURE IN HPA 1024.8 1015.2 1011.2 1008.6 1006.5 1004.1 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1037.7 1028.8 1021.1 1017.5 1012.7 1011.1 ****** ****** ****** ****** ****** ****** ****** DAY 24 11 6 12 16 17 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1005.5 996.1 993.2 1000.0 998.8 995.8 ****** ****** ****** ****** ****** ****** ****** DAY 5 20 28 10 10 8 ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 892.0 886.6 885.9 884.6 885.7 884.7 882.8 885.6 887.5 893.5 899.9 895.1 888.7 MAX. QFE PRESSURE IN HPA 902.6 896.6 894.0 891.5 891.2 890.3 886.6 891.3 894.9 903.0 907.5 902.2 907.5 DAY 18 11 3 24 16 1 25 26 25 28 23 1 MIN. QFE PRESSURE IN HPA 878.8 871.3 871.5 877.6 878.3 877.0 879.6 878.4 877.8 882.7 893.0 886.4 871.3 DAY 4 20 28 4 10 8 22 22 11 10 6 17 MEAN QNH PRESSURE IN HPA 1017.9 1011.9 1011.1 1009.7 1010.9 1009.8 1007.7 1010.8 1012.9 1019.6 1026.7 1021.3 1014.2 MAX. QNH PRESSURE IN HPA 1029.7 1023.0 1020.1 1017.3 1017.0 1016.0 1011.9 1017.1 1021.1 1030.1 1035.1 1029.2 1035.1 DAY 18 11 3 24 16 1 25 26 25 28 23 1 MIN. QNH PRESSURE IN HPA 1003.2 994.8 995.1 1001.9 1002.6 1001.2 1004.1 1002.8 1002.1 1007.5 1019.0 1011.7 994.8 DAY 4 20 28 4 10 8 22 22 11 10 6 17 MEAN QFF PRESSURE IN HPA 1024.4 1013.8 1009.2 1007.3 1005.5 1002.6 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1036.2 1027.0 1019.8 1015.4 1011.9 1009.8 ****** ****** ****** ****** ****** ****** ****** DAY 24 2 3 24 14 17 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1007.7 994.4 992.0 997.7 999.0 993.3 ****** ****** ****** ****** ****** ****** ****** DAY 4 20 28 10 10 8 ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 890.7 885.0 884.5 883.5 884.1 883.1 881.5 884.3 886.3 892.4 898.6 893.4 887.3 MAX. QFE PRESSURE IN HPA 902.3 894.1 892.6 889.6 889.8 888.8 885.7 890.4 894.3 902.0 904.6 901.9 904.6 DAY 18 2 5 1 16 17 31 26 25 28 23 3 MIN. QFE PRESSURE IN HPA 874.6 868.8 872.2 877.0 877.0 875.4 878.0 877.0 876.1 881.6 891.8 884.2 868.8 DAY 4 20 28 4 5 8 21 22 11 9 6 16 MEAN QNH PRESSURE IN HPA 1016.5 1010.1 1009.6 1008.4 1009.1 1008.0 1006.2 1009.3 1011.6 1018.4 1025.2 1019.4 1012.6 MAX. QNH PRESSURE IN HPA 1029.4 1020.2 1018.6 1015.2 1015.4 1014.3 1010.9 1016.1 1020.5 1029.0 1031.9 1028.9 1031.9 DAY 18 2 5 1 16 17 31 26 25 28 23 3 MIN. QNH PRESSURE IN HPA 998.5 992.1 995.9 1001.2 1001.2 999.4 1002.3 1001.2 1000.2 1006.3 1017.7 1009.2 992.1 DAY 4 20 28 4 5 8 21 22 11 9 6 16 MEAN QFF PRESSURE IN HPA 1022.7 1012.3 1007.5 1006.2 1003.8 1001.0 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1035.5 1025.5 1017.8 1013.4 1010.6 1008.8 ****** ****** ****** ****** ****** ****** ****** DAY 18 2 3 24 15 10 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1000.3 991.7 992.5 997.8 994.8 992.1 ****** ****** ****** ****** ****** ****** ****** DAY 4 20 27 10 5 8 ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1962 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 890.7 884.8 884.0 883.1 883.5 882.2 880.6 883.5 885.6 892.0 898.3 893.3 886.8 MAX. QFE PRESSURE IN HPA 902.2 894.7 892.4 889.0 889.5 887.7 884.1 889.6 894.0 901.8 904.7 902.1 904.7 DAY 18 10 5 24 15 17 25 26 25 28 27 3 MIN. QFE PRESSURE IN HPA 874.0 868.1 871.1 876.2 877.0 875.2 877.2 876.2 876.1 881.2 891.0 883.6 868.1 DAY 4 20 27 4 5 8 21 22 11 9 6 16 MEAN QNH PRESSURE IN HPA 1016.4 1009.8 1008.9 1007.9 1008.5 1007.0 1005.2 1008.4 1010.7 1017.9 1024.9 1019.4 1012.1 MAX. QNH PRESSURE IN HPA 1029.2 1020.9 1018.3 1014.6 1015.1 1013.1 1009.1 1015.2 1020.1 1028.8 1032.0 1029.1 1032.0 DAY 18 10 5 24 15 17 25 26 25 28 27 3 MIN. QNH PRESSURE IN HPA 997.9 991.3 994.6 1000.3 1001.2 999.2 1001.4 1000.3 1000.2 1005.9 1016.8 1008.5 991.3 DAY 4 20 27 4 5 8 21 22 11 9 6 16 MEAN QFF PRESSURE IN HPA 1022.9 1012.4 1007.7 1006.0 1003.8 1000.6 996.3 1000.5 1005.3 1015.4 1025.3 1021.5 1009.8 MAX. QFF PRESSURE IN HPA 1035.4 1025.3 1017.8 1012.9 1011.2 1008.2 1000.4 1007.8 1015.6 1026.4 1035.7 1032.1 1035.7 DAY 18 1 2 24 15 17 26 26 25 28 27 1 MIN. QFF PRESSURE IN HPA 1000.0 991.0 991.6 997.7 995.7 992.2 991.0 992.4 993.9 1001.4 1014.3 1009.5 991.0 DAY 4 20 27 26 5 7 22 22 11 9 6 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 891.1 885.0 884.4 883.2 883.8 882.7 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 902.2 896.0 892.7 889.0 889.3 888.0 ****** ****** ****** ****** ****** ****** ****** DAY 18 10 5 18 15 17 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 874.8 869.4 870.4 876.7 878.0 876.0 ****** ****** ****** ****** ****** ****** ****** DAY 4 20 27 4 6 7 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1016.9 1010.1 1009.5 1008.0 1008.8 1007.5 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1029.2 1022.3 1018.7 1014.6 1014.9 1013.4 ****** ****** ****** ****** ****** ****** ****** DAY 18 10 5 18 15 17 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 998.7 992.7 993.8 1000.9 1002.3 1000.1 ****** ****** ****** ****** ****** ****** ****** DAY 4 20 27 4 6 7 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1024.0 1013.6 1009.2 1006.8 1004.3 1001.2 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1035.7 1027.6 1020.1 1013.5 1010.6 1009.0 ****** ****** ****** ****** ****** ****** ****** DAY 24 1 5 18 15 17 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1001.8 993.0 991.9 1000.3 997.9 993.0 ****** ****** ****** ****** ****** ****** ****** DAY 4 20 27 10 6 7 ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 891.1 885.7 884.7 883.3 884.0 883.2 ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 902.4 896.8 892.7 889.8 890.1 888.4 ****** ****** ****** ****** ****** ****** ****** DAY 18 10 5 18 15 17 ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 875.7 869.4 870.2 877.1 878.4 876.0 ****** ****** ****** ****** ****** ****** ****** DAY 4 20 27 4 8 7 ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1016.9 1010.8 1009.8 1008.2 1008.9 1008.1 ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1029.5 1023.2 1018.7 1015.4 1015.8 1013.9 ****** ****** ****** ****** ****** ****** ****** DAY 18 10 5 18 15 17 ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 999.7 992.7 993.6 1001.3 1002.8 1000.1 ****** ****** ****** ****** ****** ****** ****** DAY 4 20 27 4 8 7 ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1023.4 1013.2 1007.9 1006.1 1003.5 1001.1 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1035.7 1027.2 1017.6 1013.3 1011.2 1009.0 ****** ****** ****** ****** ****** ****** ****** DAY 18 10 5 18 15 17 ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1003.4 993.4 989.8 999.4 996.8 992.1 ****** ****** ****** ****** ****** ****** ****** DAY 4 20 27 4 8 7 ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.0 6.0 7.0 12.1 15.4 22.1 26.2 24.7 21.7 16.0 6.9 0.3 13.6 MINIMUN AIR TEMPERATURE (C) -0.6 0.7 0.1 6.4 9.0 11.6 15.0 14.3 9.7 6.6 -1.0 -4.9 5.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 1 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 7 6 5 0 0 0 0 0 0 0 4 16 38 DAYS WITH FREEZING MIN.<= 0 21 14 15 0 0 0 0 0 0 0 23 31 104 TEMPERATURE RECORDS LOWEST(C) -5.0 -5.0 -6.0 3.0 6.0 8.0 12.0 10.0 6.0 3.0 -6.0 -12.0 -12.0 DAY 7 9 9 19 1 12 1 29 11 18 28 6 MAXIMUM AIR TEMPERATURE (C) 8.8 10.6 12.7 17.5 19.7 28.1 32.5 31.0 29.4 22.0 13.1 4.9 19.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 12 27 21 16 0 0 0 76 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 7 7 TEMPERATURE RECORDS HIGHEST(C) 15.0 18.0 19.0 22.0 25.0 33.0 35.0 36.0 35.0 29.0 18.0 12.0 36.0 DAY 15 16 23 3 23 19 2 24 1 12 1 17 DIF. BETWEEN (MAX.-MIN.) (C) 9.4 9.9 12.6 11.1 10.7 16.5 17.5 16.7 19.7 15.4 14.1 9.8 13.6 MEAN DAILY TEMP. (MDT) (C) 4.1 5.7 6.4 11.9 14.3 19.8 23.7 22.6 19.5 14.3 6.0 0.0 12.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 9.5 85.0 52.5 10.5 0.0 0.0 0.0 157.5 HEATING DEG. DAYS(BASE 18 0C) 430.5 345.5 360.0 182.0 113.5 4.0 0.0 0.0 9.0 115.0 359.0 558.0 2476.5 DEWPOINT (MEAN C) 1.1 0.1 0.5 7.1 9.9 12.4 14.5 13.2 9.8 6.9 1.8 -3.0 6.2 MIXING RATIO (G/KG) 4.71 4.46 4.66 7.24 8.79 10.37 11.92 10.95 8.71 7.14 4.99 3.59 7.29 VAPOUR PRESSURE (HPA) 6.71 6.34 6.60 10.21 12.38 14.60 16.67 15.35 12.29 10.14 7.11 5.13 10.29 SATURATION DEF. (HPA) 2.37 3.51 4.19 4.35 5.71 13.14 19.12 17.22 15.66 9.26 3.51 1.50 8.29 RELATIVE HUMIDITY (MEAN %) 78 68 67 75 73 58 53 53 52 60 73 80 66 RELATIVE HUMIDITY (MAX. %) 92 83 85 94 97 93 90 90 88 92 93 90 91 RELATIVE HUMIDITY (MIN. %) 64 55 49 58 55 38 34 34 32 38 54 67 48 RELATIVE HUMIDITY (MEAN% 03UTC) 92 81 83 93 97 92 90 90 88 91 91 88 90 RELATIVE HUMIDITY (MEAN% 09UTC) 76 64 59 67 61 49 45 43 42 46 64 74 58 RELATIVE HUMIDITY (MEAN% 15UTC) 67 61 58 65 67 45 35 40 33 47 63 76 55 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 17.5 34.3 24.2 68.5 89.8 26.3 15.3 21.4 3.3 26.9 12.6 36.0 376.1 DAYS WITH PRECIPITATION >=10 1 0 0 1 3 0 0 0 0 0 0 0 5 DAYS WITH PRECIPITATION >= 5 1 3 3 6 7 2 2 2 0 2 1 4 33 DAYS WITH PRECIPITATION >= 1 4 8 7 12 20 7 4 6 3 8 4 8 91 DAYS WITH PRECIPITATION 10 9 11 19 24 10 6 8 5 15 7 10 134 GREATEST DAILY PRECIPITATION 11.0 9.0 6.0 14.0 12.0 6.0 8.0 7.0 1.0 8.0 7.0 8.0 14.0 DAY 3 12 31 11 9 7 6 15 4 21 2 31 DAY WITH THUNDER STORM 0 0 0 4 5 4 2 2 3 4 0 0 24 DAYS WITH SNOW OR SLEET 0 2 1 0 0 0 0 0 0 0 0 6 9 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 90 180 180 180 360 360 360 360 360 360 180 360 PREVAILING WIND SPEED(KNOTS) 13.6 3.3 5.3 7.4 6.8 5.8 6.3 6.0 6.1 7.2 5.8 8.7 6.6 PREVAILING WIND PERCENT 16.1 5.7 9.0 14.7 10.3 14.7 20.6 18.7 16.7 14.1 18.6 12.7 10.8 CALMS PERCENT OF WIND 48.4 79.3 73.5 70.7 63.2 52.7 43.2 49.0 49.3 51.9 55.8 57.8 57.7 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 156 156 173 1850 VECTOR WIND DIRECTION (MEAN) 156 177 167 156 150 25 360 359 18 13 5 233 18 VECTOR WIND MAGNITUDE(KNOTS) 0.7 0.3 0.7 1.1 0.7 0.8 2.0 2.6 2.1 1.0 1.5 0.7 0.5 WIND STEADINESES (MEAN %) 14.9 27.3 58.3 57.9 25.9 21.1 62.5 86.7 65.6 33.3 68.2 19.4 17.9 WIND SPEED (MEAN KNOTS) 4.7 1.1 1.2 1.9 2.7 3.8 3.2 3.0 3.2 3.0 2.2 3.6 2.8 FASTEST WIND DIRECTION 180 250 210 180 230 180 360 350 30 20 20 180 180 FASTEST WIND SPEED (KNOTS) 28 16 11 15 20 22 20 18 22 18 22 25 28 DAY 16 16 15 27 31 9 14 3 22 17 24 10 DAYS WITH SKY CLEAR (0-2)/8 4 13 15 5 6 23 27 23 24 18 22 12 192 DAYS WITH P.CLOUDY (3-6)/8 20 9 12 14 16 7 4 8 5 10 4 11 120 DAYS WITH CLOUDY (7-8)/8 7 6 4 11 9 0 0 0 1 3 4 8 53 DAYS WITH VISIBILITY =< 2 KM 0 0 1 0 0 0 0 0 0 0 0 4 5 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 892.9 891.1 889.1 887.0 888.3 890.4 886.9 887.9 890.4 894.0 895.2 894.6 890.7 MAX. QFE PRESSURE IN HPA 901.3 903.6 898.7 898.0 893.6 896.4 891.2 893.3 902.5 901.5 901.8 909.1 909.1 DAY-HOUR 7- 9 8- 9 22- 9 2- 9 24- 6 12- 9 31- 6 5- 3 24- 6 18- 6 5- 6 26- 9 MIN. QFE PRESSURE IN HPA 882.6 881.0 874.1 880.5 882.5 880.8 879.4 880.0 880.0 887.8 888.5 877.5 874.1 DAY-HOUR 24-12 23- 3 5- 6 28-15 2-12 20-15 3-15 23-15 2-15 23-12 1-15 10- 3 MEAN QNH PRESSURE IN HPA 1018.8 1016.9 1014.7 1012.4 1013.7 1016.1 1012.2 1013.3 1016.1 1020.1 1021.4 1020.8 1016.4 MAX. QNH PRESSURE IN HPA 1028.2 1030.8 1025.4 1024.6 1019.7 1022.8 1017.0 1019.3 1029.6 1028.5 1028.8 1036.9 1036.9 DAY-HOUR 7- 9 8- 9 22- 9 2- 9 24- 6 12- 9 31- 6 5- 3 24- 6 18- 6 5- 6 26- 9 MIN. QNH PRESSURE IN HPA 1007.4 1005.7 998.0 1005.1 1007.3 1005.4 1003.9 1004.5 1004.5 1013.2 1014.0 1001.8 998.0 DAY-HOUR 24-12 23- 3 5- 6 28-15 2-12 20-15 3-15 23-15 2-15 23-12 1-15 10- 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 892.9 891.1 889.2 887.0 888.6 891.3 887.9 888.8 890.9 894.5 895.5 894.8 891.0 MAX. QFE PRESSURE IN HPA 900.5 902.8 898.1 896.3 893.0 896.0 890.6 893.3 901.0 900.4 901.5 908.0 908.0 DAY 7 8 23 2 14 12 29 5 24 18 5 26 MIN. QFE PRESSURE IN HPA 884.3 881.0 874.8 881.0 883.0 885.5 883.3 884.5 885.2 889.3 890.5 877.5 874.8 DAY 24 23 5 29 3 20 23 23 3 23 1 10 MEAN QNH PRESSURE IN HPA 1018.9 1016.9 1014.8 1012.3 1014.1 1017.1 1013.3 1014.4 1016.7 1020.6 1021.7 1021.0 1016.8 MAX. QNH PRESSURE IN HPA 1027.4 1029.9 1024.7 1022.7 1019.0 1022.3 1016.3 1019.3 1027.9 1027.2 1028.5 1035.7 1035.7 DAY 7 8 23 2 14 12 29 5 24 18 5 26 MIN. QNH PRESSURE IN HPA 1009.3 1005.7 998.7 1005.7 1007.9 1010.7 1008.2 1009.5 1010.3 1014.9 1016.2 1001.8 998.7 DAY 24 23 5 29 3 20 23 23 3 23 1 10 MEAN QFF PRESSURE IN HPA 1020.6 1018.2 1015.7 1010.6 1011.0 1011.2 1005.4 1007.2 1011.2 1017.7 1023.2 1025.4 1014.8 MAX. QFF PRESSURE IN HPA 1031.6 1033.6 1028.1 1021.3 1017.1 1018.5 1008.9 1013.5 1024.2 1026.3 1030.7 1044.5 1044.5 DAY 7 8 7 2 14 12 11 5 24 18 5 26 MIN. QFF PRESSURE IN HPA 1007.4 1005.5 998.7 1004.0 1005.3 1003.3 999.3 1001.6 1002.1 1011.0 1014.7 1002.1 998.7 DAY 24 23 5 28 29 20 23 23 3 1 1 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 893.6 891.5 889.7 887.7 888.9 891.7 888.4 889.3 891.8 895.1 896.1 895.4 891.6 MAX. QFE PRESSURE IN HPA 901.0 903.1 898.1 897.2 893.6 896.2 891.2 893.3 902.5 901.5 901.8 908.0 908.0 DAY 7 8 23 2 24 28 31 5 24 18 5 26 MIN. QFE PRESSURE IN HPA 883.8 881.6 874.1 881.8 883.1 886.6 884.0 885.2 885.5 889.5 891.4 877.5 874.1 DAY 24 23 5 29 11 20 23 23 2 23 1 10 MEAN QNH PRESSURE IN HPA 1019.6 1017.3 1015.3 1013.2 1014.4 1017.5 1013.9 1014.9 1017.6 1021.4 1022.4 1021.7 1017.4 MAX. QNH PRESSURE IN HPA 1027.9 1030.2 1024.7 1023.7 1019.7 1022.6 1017.0 1019.3 1029.6 1028.5 1028.8 1035.7 1035.7 DAY 7 8 23 2 24 28 31 5 24 18 5 26 MIN. QNH PRESSURE IN HPA 1008.8 1006.3 998.0 1006.5 1008.0 1011.9 1009.0 1010.3 1010.7 1015.1 1017.2 1001.8 998.0 DAY 24 23 5 29 11 20 23 23 2 23 1 10 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 893.7 891.9 889.8 887.6 888.7 891.0 887.8 888.8 891.3 894.9 896.0 895.9 891.5 MAX. QFE PRESSURE IN HPA 901.3 903.6 898.7 898.0 893.3 896.4 890.6 893.0 902.0 901.5 901.8 909.1 909.1 DAY 7 8 22 2 24 12 30 5 24 18 5 26 MIN. QFE PRESSURE IN HPA 883.8 882.2 877.0 882.0 883.3 885.2 882.8 884.0 884.3 888.8 890.4 878.8 877.0 DAY 24 23 5 29 11 20 23 23 2 23 1 10 MEAN QNH PRESSURE IN HPA 1019.8 1017.8 1015.4 1013.1 1014.2 1016.8 1013.2 1014.4 1017.2 1021.1 1022.3 1022.2 1017.3 MAX. QNH PRESSURE IN HPA 1028.2 1030.8 1025.4 1024.6 1019.3 1022.8 1016.3 1019.0 1029.0 1028.5 1028.8 1036.9 1036.9 DAY 7 8 22 2 24 12 30 5 24 18 5 26 MIN. QNH PRESSURE IN HPA 1008.8 1007.0 1001.2 1006.8 1008.2 1010.3 1007.7 1009.0 1009.3 1014.3 1016.1 1003.2 1001.2 DAY 24 23 5 29 11 20 23 23 2 23 1 10 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 892.2 890.8 888.7 886.7 887.9 889.4 885.8 887.0 889.5 893.1 894.4 894.4 890.0 MAX. QFE PRESSURE IN HPA 899.2 902.8 897.0 896.4 893.3 895.4 888.4 890.6 899.0 898.0 901.0 907.4 907.4 DAY 6 7 7 2 24 12 31 5 24 18 5 26 MIN. QFE PRESSURE IN HPA 882.6 881.0 878.2 881.5 882.5 882.4 880.2 882.6 881.2 887.8 889.1 878.8 878.2 DAY 24 25 5 29 2 20 3 23 2 23 24 10 MEAN QNH PRESSURE IN HPA 1018.1 1016.6 1014.2 1012.0 1013.3 1015.0 1011.0 1012.3 1015.1 1019.1 1020.5 1020.5 1015.6 MAX. QNH PRESSURE IN HPA 1025.9 1029.9 1023.5 1022.8 1019.3 1021.7 1013.9 1016.3 1025.7 1024.6 1027.9 1035.0 1035.0 DAY 6 7 7 2 24 12 31 5 24 18 5 26 MIN. QNH PRESSURE IN HPA 1007.4 1005.7 1002.5 1006.2 1007.3 1007.2 1004.8 1007.4 1005.9 1013.2 1014.7 1003.2 1002.5 DAY 24 25 5 29 2 20 3 23 2 23 24 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1963 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 891.9 890.5 888.3 886.1 887.4 888.8 884.5 885.7 888.5 892.6 894.0 894.3 889.4 MAX. QFE PRESSURE IN HPA 899.0 901.9 896.8 895.0 892.8 894.2 887.2 889.5 898.5 897.8 900.0 907.4 907.4 DAY 6 7 7 1 24 12 10 16 24 18 5 26 MIN. QFE PRESSURE IN HPA 882.6 881.0 878.2 880.5 882.5 880.8 879.4 880.0 880.0 888.2 888.5 880.0 878.2 DAY 24 25 16 28 2 20 3 23 2 23 1 10 MEAN QNH PRESSURE IN HPA 1017.8 1016.2 1013.7 1011.4 1012.7 1014.4 1009.5 1010.9 1014.0 1018.6 1020.2 1020.5 1015.0 MAX. QNH PRESSURE IN HPA 1025.7 1028.9 1023.2 1021.2 1018.8 1020.3 1012.6 1015.1 1025.1 1024.3 1026.8 1035.0 1035.0 DAY 6 7 7 1 24 12 10 16 24 18 5 26 MIN. QNH PRESSURE IN HPA 1007.4 1005.7 1002.5 1005.1 1007.3 1005.4 1003.9 1004.5 1004.5 1013.7 1014.0 1004.5 1002.5 DAY 24 25 16 28 2 20 3 23 2 23 1 10 MEAN QFF PRESSURE IN HPA 1019.5 1017.5 1014.5 1009.6 1009.6 1008.3 1001.6 1003.7 1008.5 1015.7 1021.5 1024.9 1012.9 MAX. QFF PRESSURE IN HPA 1029.6 1031.6 1028.0 1019.7 1015.3 1015.3 1005.5 1008.2 1020.7 1023.3 1028.6 1043.2 1043.2 DAY 8 7 7 1 13 12 10 16 24 18 5 26 MIN. QFF PRESSURE IN HPA 1006.2 1006.3 1001.3 1002.7 1003.0 998.2 994.9 996.0 997.1 1009.0 1012.4 1006.2 994.9 DAY 24 23 16 28 27 20 3 23 2 1 1 10 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -13.6 -3.3 6.4 10.1 18.6 23.5 26.5 25.1 21.8 13.7 8.3 0.1 11.4 MINIMUN AIR TEMPERATURE (C) -23.2 -8.9 -1.1 3.3 8.0 13.1 15.2 13.5 8.8 1.5 -0.8 -6.2 1.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 31 26 9 0 0 0 0 0 0 0 7 25 98 DAYS WITH FREEZING MIN.<= 0 31 29 14 3 0 0 0 0 0 11 18 31 137 TEMPERATURE RECORDS LOWEST(C) -30.0 -18.0 -12.0 0.0 4.0 11.0 12.0 10.0 5.0 -2.0 -10.0 -11.0 -30.0 DAY 24 7 2 15 2 2 11 30 18 6 29 27 MAXIMUM AIR TEMPERATURE (C) -6.7 0.3 11.5 14.7 24.5 29.4 33.0 32.1 29.3 21.0 14.1 4.6 17.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 16 29 26 17 0 0 0 90 DAYS WITH MAXIMUM TEMP. <= 0 29 18 0 0 0 0 0 0 0 0 0 4 51 TEMPERATURE RECORDS HIGHEST(C) 2.0 5.0 19.0 22.0 31.0 33.0 37.0 37.0 32.0 27.0 20.0 11.0 37.0 DAY 17 4 31 27 30 8 17 13 5 2 17 6 DIF. BETWEEN (MAX.-MIN.) (C) 16.5 9.2 12.6 11.4 16.5 16.3 17.8 18.6 20.5 19.5 14.9 10.8 15.4 MEAN DAILY TEMP. (MDT) (C) -14.9 -4.3 5.2 9.0 16.2 21.2 24.1 22.8 19.0 11.3 6.6 -0.8 9.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.5 19.5 95.0 61.0 1.5 0.0 0.0 0.0 178.5 HEATING DEG. DAYS(BASE 18 0C)1021.0 647.5 396.0 270.0 70.0 0.5 0.0 0.0 6.5 209.0 340.5 583.5 3544.5 DEWPOINT (MEAN C) -16.6 -5.4 2.2 4.1 10.4 15.3 16.3 12.5 8.1 2.8 -1.7 -5.5 3.5 MIXING RATIO (G/KG) 1.31 2.93 5.25 5.92 9.17 12.55 13.49 10.43 7.87 5.39 3.96 2.94 6.77 VAPOUR PRESSURE (HPA) 1.89 4.18 7.44 8.36 12.92 17.55 18.80 14.60 11.12 7.69 5.64 4.21 9.53 SATURATION DEF. (HPA) 0.55 0.75 2.88 4.88 9.91 12.75 17.57 19.19 17.15 9.51 6.12 2.25 8.63 RELATIVE HUMIDITY (MEAN %) 78 86 76 68 61 62 56 50 48 54 55 69 64 RELATIVE HUMIDITY (MAX. %) 83 92 90 84 83 81 81 88 88 93 81 88 86 RELATIVE HUMIDITY (MIN. %) 71 79 65 57 49 51 43 31 27 30 35 51 49 RELATIVE HUMIDITY (MEAN% 03UTC) 81 91 89 83 82 81 81 88 88 92 80 86 85 RELATIVE HUMIDITY (MEAN% 09UTC) 78 84 72 62 53 55 49 41 35 39 43 60 56 RELATIVE HUMIDITY (MEAN% 15UTC) 78 84 69 62 53 55 45 32 31 41 42 62 55 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 20.0 30.1 39.8 63.1 15.8 38.4 0.1 2.2 0.3 1.5 5.2 22.2 238.7 DAYS WITH PRECIPITATION >=10 1 1 2 1 0 1 0 0 0 0 0 1 7 DAYS WITH PRECIPITATION >= 5 1 2 3 4 1 4 0 0 0 0 0 1 16 DAYS WITH PRECIPITATION >= 1 3 7 10 13 4 9 0 2 0 1 3 3 55 DAYS WITH PRECIPITATION 3 11 15 17 11 17 4 4 1 1 5 10 99 GREATEST DAILY PRECIPITATION 15.0 12.0 15.0 16.0 9.0 14.0 0.0 1.2 0.3 1.5 3.0 16.0 16.0 DAY 18 3 12 9 4 22 ** 1 13 3 21 31 DAY WITH THUNDER STORM 0 0 0 2 4 9 0 0 0 0 0 0 15 DAYS WITH SNOW OR SLEET 1 8 2 1 0 0 0 0 0 0 1 7 20 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 225 180 180 45 360 180 360 360 45 45 180 45 360 PREVAILING WIND SPEED(KNOTS) 9.0 10.8 8.3 6.1 5.6 7.8 5.9 7.0 6.8 4.1 9.0 4.9 5.8 PREVAILING WIND PERCENT 5.2 8.3 12.3 13.3 12.3 6.7 15.5 16.1 15.3 8.4 13.3 9.7 8.3 CALMS PERCENT OF WIND 79.4 71.0 61.9 46.7 47.7 66.0 58.7 60.6 62.7 71.6 43.3 74.2 62.0 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 208 201 126 324 174 274 21 9 25 42 162 9 78 VECTOR WIND MAGNITUDE(KNOTS) 0.5 1.0 1.1 0.2 1.0 0.4 1.3 1.5 1.7 0.7 1.6 0.2 0.2 WIND STEADINESES (MEAN %) 38.5 52.6 36.7 4.5 24.4 19.0 50.0 60.0 70.8 63.6 39.0 15.4 7.7 WIND SPEED (MEAN KNOTS) 1.3 1.9 3.0 4.4 4.1 2.1 2.6 2.5 2.4 1.1 4.1 1.3 2.6 FASTEST WIND DIRECTION 210 180 180 330 150 190 110 20 300 70 130 190 150 FASTEST WIND SPEED (KNOTS) 22 22 24 24 30 22 25 16 16 20 21 12 30 DAY 28 8 25 3 21 1 9 19 12 5 22 14 DAYS WITH SKY CLEAR (0-2)/8 23 4 7 9 17 20 30 29 27 27 12 17 222 DAYS WITH P.CLOUDY (3-6)/8 7 5 15 8 12 9 1 2 2 4 13 2 80 DAYS WITH CLOUDY (7-8)/8 1 20 9 13 2 1 0 0 1 0 5 12 64 DAYS WITH VISIBILITY =< 2 KM 1 6 1 0 0 0 0 0 0 0 0 1 9 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 898.4 893.5 889.4 888.0 889.8 887.6 885.8 885.5 890.6 896.5 892.7 897.4 891.3 MAX. QFE PRESSURE IN HPA 907.5 901.5 897.2 898.7 895.0 896.4 894.1 892.2 898.3 901.4 903.0 905.0 907.5 DAY-HOUR 30- 6 27- 6 17- 9 24- 6 19- 3 3- 6 23- 6 21- 6 16- 6 31- 6 30- 6 27- 3 MIN. QFE PRESSURE IN HPA 879.0 884.0 877.1 877.9 883.4 880.2 877.0 878.0 884.1 884.1 873.6 884.4 873.6 DAY-HOUR 18- 6 3-15 12-15 6- 6 21-15 26-15 9-15 17-15 10-15 2-15 27- 3 23-12 MEAN QNH PRESSURE IN HPA 1025.1 1019.6 1015.0 1013.4 1015.5 1013.0 1010.9 1010.7 1016.3 1022.9 1018.6 1023.9 1017.1 MAX. QNH PRESSURE IN HPA 1035.1 1028.5 1023.7 1025.4 1021.2 1022.8 1020.2 1018.1 1024.9 1028.4 1030.1 1032.4 1035.1 DAY-HOUR 30- 6 27- 6 17- 9 24- 6 19- 3 3- 6 23- 6 21- 6 16- 6 31- 6 30- 6 27- 3 MIN. QNH PRESSURE IN HPA 1003.4 1009.0 1001.3 1002.2 1008.3 1004.8 1001.2 1002.3 1009.1 1009.1 997.4 1009.4 997.4 DAY-HOUR 18- 6 3-15 12-15 6- 6 21-15 26-15 9-15 17-15 10-15 2-15 27- 3 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 898.2 893.4 889.3 887.9 890.4 888.7 886.7 886.5 891.1 896.6 892.5 897.5 891.6 MAX. QFE PRESSURE IN HPA 907.0 900.6 895.6 898.2 895.0 896.0 893.8 892.0 897.8 900.3 902.5 905.0 907.0 DAY 30 16 17 24 19 3 23 21 16 27 12 27 MIN. QFE PRESSURE IN HPA 879.4 885.3 879.6 878.0 886.6 884.0 882.5 880.8 886.4 889.0 873.6 884.6 873.6 DAY 18 4 13 6 11 15 19 12 11 5 27 24 MEAN QNH PRESSURE IN HPA 1024.8 1019.5 1014.9 1013.4 1016.1 1014.2 1012.0 1011.8 1016.9 1023.0 1018.5 1024.1 1017.4 MAX. QNH PRESSURE IN HPA 1034.6 1027.5 1021.9 1024.8 1021.2 1022.3 1019.9 1017.9 1024.3 1027.1 1029.6 1032.4 1034.6 DAY 30 16 17 24 19 3 23 21 16 27 12 27 MIN. QNH PRESSURE IN HPA 1003.9 1010.4 1004.1 1002.3 1011.9 1009.0 1007.3 1005.4 1011.7 1014.6 997.4 1009.7 997.4 DAY 18 4 13 6 11 15 19 12 11 5 27 24 MEAN QFF PRESSURE IN HPA 1037.3 1025.5 1016.2 1012.8 1012.3 1007.8 1004.1 1004.6 1011.6 1022.2 1019.5 1028.8 1016.9 MAX. QFF PRESSURE IN HPA 1050.0 1035.5 1025.8 1024.7 1018.4 1016.6 1013.0 1011.7 1018.8 1029.2 1032.3 1039.5 1050.0 DAY 30 1 5 24 19 3 23 21 17 31 30 27 MIN. QFF PRESSURE IN HPA 1008.6 1015.7 1006.2 998.0 1006.7 1001.8 998.6 997.3 1005.8 1011.1 998.9 1011.6 997.3 DAY 18 4 13 6 11 15 19 12 11 3 27 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 898.5 893.9 890.0 888.4 890.9 889.1 887.4 887.1 892.0 897.6 893.1 897.9 892.2 MAX. QFE PRESSURE IN HPA 907.5 901.5 896.6 898.7 894.3 896.4 894.1 892.2 898.3 901.4 903.0 905.0 907.5 DAY 30 27 8 24 19 3 23 21 16 31 30 27 MIN. QFE PRESSURE IN HPA 879.0 885.4 881.0 877.9 886.6 884.9 882.9 881.5 888.2 890.0 874.5 884.8 874.5 DAY 18 9 13 6 11 15 19 13 11 2 27 24 MEAN QNH PRESSURE IN HPA 1025.2 1020.0 1015.7 1013.9 1016.6 1014.7 1012.7 1012.5 1017.9 1024.1 1019.1 1024.5 1018.1 MAX. QNH PRESSURE IN HPA 1035.1 1028.5 1023.0 1025.4 1020.5 1022.8 1020.2 1018.1 1024.9 1028.4 1030.1 1032.4 1035.1 DAY 30 27 8 24 19 3 23 21 16 31 30 27 MIN. QNH PRESSURE IN HPA 1003.4 1010.5 1005.7 1002.2 1011.9 1010.0 1007.8 1006.2 1013.7 1015.7 998.4 1009.9 998.4 DAY 18 9 13 6 11 15 19 13 11 2 27 24 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 899.1 894.0 890.2 888.6 890.6 888.1 886.8 886.6 891.6 897.4 893.6 898.1 892.1 MAX. QFE PRESSURE IN HPA 907.3 901.5 897.2 898.7 893.5 895.0 893.4 891.4 898.0 900.8 903.0 905.0 907.3 DAY 30 27 17 24 23 3 22 31 16 26 30 27 MIN. QFE PRESSURE IN HPA 879.0 886.0 881.9 879.0 887.0 884.2 882.2 880.8 887.8 888.5 878.0 885.0 878.0 DAY 18 9 13 6 11 15 9 13 11 2 27 24 MEAN QNH PRESSURE IN HPA 1025.8 1020.2 1015.9 1014.1 1016.3 1013.6 1012.1 1011.9 1017.4 1023.9 1019.7 1024.7 1018.0 MAX. QNH PRESSURE IN HPA 1034.9 1028.5 1023.7 1025.4 1019.6 1021.2 1019.5 1017.2 1024.6 1027.7 1030.1 1032.4 1034.9 DAY 30 27 17 24 23 3 22 31 16 26 30 27 MIN. QNH PRESSURE IN HPA 1003.4 1011.2 1006.6 1003.4 1012.3 1009.2 1007.0 1005.4 1013.2 1014.0 1002.3 1010.1 1002.3 DAY 18 9 13 6 11 15 9 13 11 2 27 24 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 898.2 893.1 888.9 887.7 888.9 886.5 884.7 884.3 889.7 895.8 892.0 896.8 890.6 MAX. QFE PRESSURE IN HPA 906.5 900.7 895.1 897.6 892.0 893.0 892.9 889.0 896.4 899.2 901.8 902.7 906.5 DAY 10 16 17 24 18 3 22 23 15 31 30 9 MIN. QFE PRESSURE IN HPA 879.5 885.5 878.4 879.9 885.9 881.4 877.6 878.8 886.0 885.5 877.2 884.4 877.2 DAY 18 3 12 9 21 26 9 13 3 2 26 23 MEAN QNH PRESSURE IN HPA 1024.8 1019.2 1014.5 1013.1 1014.5 1011.7 1009.8 1009.3 1015.4 1022.1 1017.9 1023.2 1016.3 MAX. QNH PRESSURE IN HPA 1034.0 1027.6 1021.3 1024.1 1017.9 1019.0 1018.9 1014.6 1022.8 1025.9 1028.8 1029.8 1034.0 DAY 10 16 17 24 18 3 22 23 15 31 30 9 MIN. QNH PRESSURE IN HPA 1004.0 1010.7 1002.8 1004.4 1011.1 1006.1 1001.9 1003.2 1011.2 1010.7 1001.4 1009.4 1001.4 DAY 18 3 12 9 21 26 9 13 3 2 26 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1964 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 898.2 893.0 888.5 887.3 888.3 885.8 883.3 883.0 888.6 895.3 892.1 896.8 890.0 MAX. QFE PRESSURE IN HPA 906.3 900.7 895.0 897.0 891.8 892.8 890.2 887.0 895.7 899.4 901.9 902.0 906.3 DAY 10 16 17 24 18 2 22 31 16 31 11 27 MIN. QFE PRESSURE IN HPA 880.9 884.0 877.1 879.9 883.4 880.2 877.0 878.0 884.1 884.1 876.0 884.6 876.0 DAY 18 3 12 9 21 26 9 17 10 2 26 23 MEAN QNH PRESSURE IN HPA 1024.7 1019.1 1014.0 1012.7 1013.8 1011.0 1008.3 1007.9 1014.1 1021.5 1018.0 1023.2 1015.7 MAX. QNH PRESSURE IN HPA 1033.8 1027.6 1021.2 1023.5 1017.7 1018.8 1015.9 1012.3 1022.0 1026.1 1028.9 1029.0 1033.8 DAY 10 16 17 24 18 2 22 31 16 31 11 27 MIN. QNH PRESSURE IN HPA 1005.5 1009.0 1001.3 1004.4 1008.3 1004.8 1001.2 1002.3 1009.1 1009.1 1000.1 1009.7 1000.1 DAY 18 3 12 9 21 26 9 17 10 2 26 23 MEAN QFF PRESSURE IN HPA 1037.2 1025.0 1015.0 1012.0 1009.5 1004.3 1000.0 1000.5 1008.8 1020.7 1019.1 1027.9 1015.0 MAX. QFF PRESSURE IN HPA 1049.7 1033.8 1022.7 1022.0 1014.6 1013.6 1007.7 1006.0 1017.2 1028.1 1034.4 1036.6 1049.7 DAY 21 16 8 24 18 2 22 31 16 31 30 27 MIN. QFF PRESSURE IN HPA 1013.2 1016.4 1003.3 1002.0 1002.5 997.1 992.2 994.3 1003.2 1005.7 1002.6 1011.0 992.2 DAY 18 3 12 6 21 26 9 17 10 2 26 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.7 -0.5 7.8 11.4 18.7 22.4 25.8 26.6 20.9 11.9 7.5 2.8 12.6 MINIMUN AIR TEMPERATURE (C) -8.0 -5.2 0.1 3.7 8.6 12.0 14.8 14.5 9.6 5.3 -1.1 -3.8 4.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 30 19 5 4 0 0 0 0 0 1 7 19 85 DAYS WITH FREEZING MIN.<= 0 31 27 14 8 1 0 0 0 0 3 23 27 134 TEMPERATURE RECORDS LOWEST(C) -14.0 -13.0 -8.0 -7.0 0.0 10.0 11.0 11.0 5.0 -4.0 -6.0 -10.0 -14.0 DAY 13 4 13 5 4 11 14 24 24 28 29 21 MAXIMUM AIR TEMPERATURE (C) -1.8 3.4 12.8 16.5 24.0 28.1 31.4 33.9 27.4 16.3 13.7 8.1 17.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 8 24 29 9 0 0 0 70 DAYS WITH MAXIMUM TEMP. <= 0 24 5 1 1 0 0 0 0 0 0 0 2 33 TEMPERATURE RECORDS HIGHEST(C) 2.0 10.0 20.0 25.0 29.0 32.0 39.0 38.0 34.0 25.0 19.0 16.0 39.0 DAY 28 27 8 25 15 7 16 14 15 3 17 13 DIF. BETWEEN (MAX.-MIN.) (C) 6.2 8.6 12.7 12.8 15.4 16.1 16.6 19.4 17.8 11.0 14.8 11.9 13.6 MEAN DAILY TEMP. (MDT) (C) -4.9 -0.9 6.5 10.1 16.3 20.0 23.1 24.2 18.5 10.8 6.3 2.2 11.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 6.5 67.0 100.0 6.0 0.0 0.0 0.0 179.5 HEATING DEG. DAYS(BASE 18 0C) 710.0 529.0 357.5 238.0 57.0 1.5 0.0 0.0 26.0 224.0 350.0 491.0 2984.0 DEWPOINT (MEAN C) -7.0 -4.8 -0.6 1.4 6.3 9.9 11.7 11.4 6.9 3.9 -1.0 -4.0 2.8 MIXING RATIO (G/KG) 2.61 3.11 4.35 5.07 6.98 8.74 9.93 9.67 7.11 5.90 4.08 3.27 5.90 VAPOUR PRESSURE (HPA) 3.73 4.42 6.19 7.17 9.87 12.32 13.92 13.59 10.08 8.38 5.83 4.67 8.35 SATURATION DEF. (HPA) 0.72 1.71 5.18 7.60 12.97 15.76 20.73 23.29 16.39 6.57 5.17 3.33 9.95 RELATIVE HUMIDITY (MEAN %) 84 75 60 55 50 49 45 43 46 63 59 64 58 RELATIVE HUMIDITY (MAX. %) 91 86 89 83 83 79 75 76 80 87 83 84 83 RELATIVE HUMIDITY (MIN. %) 77 64 42 37 33 31 29 26 28 46 37 44 41 RELATIVE HUMIDITY (MEAN% 03UTC) 91 84 89 79 83 79 75 76 80 87 83 84 83 RELATIVE HUMIDITY (MEAN% 09UTC) 80 70 48 46 38 39 37 33 36 52 44 54 48 RELATIVE HUMIDITY (MEAN% 15UTC) 83 71 47 46 41 41 33 31 32 57 55 60 50 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 108.8 10.9 46.1 18.3 56.1 32.4 7.8 9.6 3.2 41.5 0.6 3.7 339.0 DAYS WITH PRECIPITATION >=10 3 0 2 0 2 0 0 0 0 0 0 0 7 DAYS WITH PRECIPITATION >= 5 6 1 2 1 3 2 0 1 0 4 0 0 20 DAYS WITH PRECIPITATION >= 1 15 2 5 9 9 8 6 3 1 10 0 3 71 DAYS WITH PRECIPITATION 18 8 9 15 13 19 11 9 4 17 5 6 134 GREATEST DAILY PRECIPITATION 29.0 7.0 23.0 5.0 16.0 7.0 2.0 5.0 3.0 9.0 0.3 1.0 29.0 DAY 9 15 2 1 3 4 5 7 29 24 18 17 DAY WITH THUNDER STORM 0 0 1 3 4 12 9 7 3 2 0 0 41 DAYS WITH SNOW OR SLEET 13 5 1 1 0 0 0 0 0 1 0 1 22 DAYS WITH DUST 0 0 0 1 1 0 1 0 0 0 1 0 4 WIND DIRECTION (PREVAILING) 45 45 360 45 180 360 360 360 360 360 360 360 360 PREVAILING WIND SPEED(KNOTS) 3.6 5.5 8.9 8.1 10.3 6.8 6.8 5.7 6.3 5.0 5.5 4.4 6.4 PREVAILING WIND PERCENT 5.8 12.9 16.8 14.0 9.7 22.7 30.3 18.7 46.0 16.1 15.3 21.3 17.6 CALMS PERCENT OF WIND 83.9 57.1 60.6 45.3 61.9 55.3 54.2 52.3 40.7 52.9 69.3 61.9 58.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 18 113 93 84 140 15 4 340 359 84 136 125 45 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.7 0.5 2.4 1.0 1.6 2.6 0.8 3.2 1.2 0.8 0.6 0.8 WIND STEADINESES (MEAN %) 40.0 26.9 11.1 42.1 34.5 45.7 78.8 26.7 84.2 35.3 29.6 25.0 25.0 WIND SPEED (MEAN KNOTS) 0.5 2.6 4.5 5.7 2.9 3.5 3.3 3.0 3.8 3.4 2.7 2.4 3.2 FASTEST WIND DIRECTION 30 190 160 150 170 260 330 30 360 130 160 190 160 FASTEST WIND SPEED (KNOTS) 7 18 30 28 20 26 24 16 20 18 28 16 30 DAY 15 28 10 18 8 11 8 8 18 7 17 13 DAYS WITH SKY CLEAR (0-2)/8 3 5 10 4 18 12 21 18 20 8 20 15 154 DAYS WITH P.CLOUDY (3-6)/8 9 19 13 15 12 17 10 13 9 14 8 9 148 DAYS WITH CLOUDY (7-8)/8 19 4 8 11 1 1 0 0 1 9 2 7 63 DAYS WITH VISIBILITY =< 2 KM 6 2 0 0 0 0 0 0 0 0 0 0 8 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1965 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 892.4 890.0 891.8 887.3 889.7 888.6 886.2 887.9 891.4 892.8 894.3 893.9 890.5 MAX. QFE PRESSURE IN HPA 902.0 902.2 903.3 898.2 900.3 895.5 891.7 897.3 897.2 902.4 901.3 903.5 903.5 DAY-HOUR 31- 9 1- 9 16- 6 9- 6 20- 6 2- 6 1- 6 9- 6 30- 6 28- 6 28- 6 22- 6 MIN. QFE PRESSURE IN HPA 877.4 873.5 879.4 871.0 882.0 879.6 878.6 880.0 885.3 881.4 878.8 881.7 871.0 DAY-HOUR 8-15 9- 6 23-12 3-15 11-12 17-15 11-12 24-15 17-15 24-15 17-12 14-12 MEAN QNH PRESSURE IN HPA 1018.4 1015.7 1017.7 1012.6 1015.4 1014.1 1011.4 1013.3 1017.2 1018.8 1020.4 1020.0 1016.2 MAX. QNH PRESSURE IN HPA 1029.0 1029.2 1030.5 1024.8 1027.1 1021.8 1017.6 1023.8 1023.7 1029.5 1028.2 1030.7 1030.7 DAY-HOUR 31- 9 1- 9 16- 6 9- 6 20- 6 2- 6 1- 6 9- 6 30- 6 28- 6 28- 6 22- 6 MIN. QNH PRESSURE IN HPA 1001.6 997.3 1003.9 994.5 1006.8 1004.1 1003.0 1004.5 1010.4 1006.1 1003.2 1006.4 994.5 DAY-HOUR 8-15 9- 6 23-12 3-15 11-12 17-15 11-12 24-15 17-15 24-15 17-12 14-12 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 892.3 890.1 891.9 887.3 890.3 889.7 887.2 888.6 891.9 893.1 894.2 893.8 890.9 MAX. QFE PRESSURE IN HPA 899.5 901.5 902.1 896.0 899.1 894.8 890.6 896.7 895.9 900.6 900.0 903.1 903.1 DAY 31 1 15 9 20 3 1 9 30 28 29 22 MIN. QFE PRESSURE IN HPA 880.0 875.0 881.8 872.0 884.3 883.1 882.2 884.1 886.6 883.2 882.2 883.8 872.0 DAY 9 9 23 4 2 15 12 30 18 24 27 14 MEAN QNH PRESSURE IN HPA 1018.2 1015.7 1017.7 1012.7 1016.0 1015.4 1012.5 1014.2 1017.8 1019.1 1020.4 1019.9 1016.6 MAX. QNH PRESSURE IN HPA 1026.2 1028.5 1029.1 1022.3 1025.8 1021.0 1016.3 1023.1 1022.2 1027.5 1026.8 1030.2 1030.2 DAY 31 1 15 9 20 3 1 9 30 28 29 22 MIN. QNH PRESSURE IN HPA 1004.5 999.0 1006.5 995.6 1009.3 1008.0 1007.0 1009.1 1011.9 1008.1 1007.0 1008.8 995.6 DAY 9 9 23 4 2 15 12 30 18 24 27 14 MEAN QFF PRESSURE IN HPA 1024.9 1020.4 1018.7 1011.9 1012.2 1009.6 1004.9 1006.7 1013.0 1018.0 1021.9 1023.5 1015.5 MAX. QFF PRESSURE IN HPA 1032.7 1034.9 1034.0 1025.5 1023.0 1015.7 1010.8 1017.4 1019.4 1031.7 1031.5 1037.3 1037.3 DAY 22 1 15 9 4 2 6 9 30 28 29 22 MIN. QFF PRESSURE IN HPA 1009.7 1001.7 1005.3 997.2 1005.4 1002.0 999.1 1002.4 1004.7 1007.5 1004.8 1007.5 997.2 DAY 9 9 23 4 2 15 20 30 18 24 27 14 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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. MEAN QFE PRESSURE IN HPA 892.6 890.4 892.9 888.4 890.9 890.3 888.0 889.7 893.3 894.1 895.5 895.1 891.8 MAX. QFE PRESSURE IN HPA 900.7 902.0 903.3 898.2 900.3 895.5 891.7 897.3 897.2 902.4 901.3 903.5 903.5 DAY 31 1 16 9 20 2 1 9 30 28 28 22 MIN. QFE PRESSURE IN HPA 880.8 873.5 881.8 875.5 884.5 883.2 882.7 886.0 887.9 883.2 881.3 884.3 873.5 DAY 8 9 23 4 2 15 12 30 18 24 17 14 MEAN QNH PRESSURE IN HPA 1018.5 1016.1 1018.9 1013.9 1016.7 1015.9 1013.4 1015.4 1019.3 1020.2 1021.8 1021.4 1017.6 MAX. QNH PRESSURE IN HPA 1027.6 1029.0 1030.5 1024.8 1027.1 1021.8 1017.6 1023.8 1023.7 1029.5 1028.2 1030.7 1030.7 DAY 31 1 16 9 20 2 1 9 30 28 28 22 MIN. QNH PRESSURE IN HPA 1005.4 997.3 1006.5 999.5 1009.5 1008.1 1007.5 1011.2 1013.3 1008.1 1006.0 1009.3 997.3 DAY 8 9 23 4 2 15 12 30 18 24 17 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 892.8 890.4 892.4 888.1 890.2 889.1 887.0 888.7 892.3 893.5 894.8 894.6 891.2 MAX. QFE PRESSURE IN HPA 902.0 902.2 902.3 897.8 898.3 895.5 890.6 896.0 896.8 902.1 900.5 902.6 902.6 DAY 31 1 16 9 19 2 1 9 30 28 28 22 MIN. QFE PRESSURE IN HPA 880.4 874.0 880.7 876.0 883.9 882.2 881.5 884.7 886.8 883.2 880.1 883.7 874.0 DAY 8 9 23 3 2 17 12 30 18 24 17 14 MEAN QNH PRESSURE IN HPA 1018.8 1016.2 1018.3 1013.5 1015.9 1014.6 1012.3 1014.2 1018.2 1019.6 1021.0 1020.8 1017.0 MAX. QNH PRESSURE IN HPA 1029.0 1029.2 1029.4 1024.3 1024.9 1021.8 1016.3 1022.3 1023.2 1029.1 1027.4 1029.7 1029.7 DAY 31 1 16 9 19 2 1 9 30 28 28 22 MIN. QNH PRESSURE IN HPA 1005.0 997.9 1005.3 1000.1 1008.9 1007.0 1006.2 1009.8 1012.1 1008.1 1004.6 1008.7 997.9 DAY 8 9 23 3 2 17 12 30 18 24 17 14 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 892.2 889.7 891.0 886.4 888.8 887.2 884.9 886.6 890.2 891.9 893.2 892.9 889.6 MAX. QFE PRESSURE IN HPA 900.8 900.5 900.7 895.6 898.0 893.0 889.1 893.7 895.6 900.0 899.0 900.8 900.8 DAY 31 1 14 9 19 2 1 8 30 28 28 22 MIN. QFE PRESSURE IN HPA 878.0 875.0 879.4 872.6 882.0 879.8 878.6 882.5 885.3 882.4 878.8 881.7 872.6 DAY 8 9 23 3 11 17 11 30 18 24 17 14 MEAN QNH PRESSURE IN HPA 1018.1 1015.3 1016.8 1011.7 1014.4 1012.5 1009.9 1011.9 1015.8 1017.8 1019.2 1018.8 1015.2 MAX. QNH PRESSURE IN HPA 1027.7 1027.4 1027.6 1021.9 1024.6 1019.0 1014.7 1019.8 1021.9 1026.8 1025.7 1027.7 1027.7 DAY 31 1 14 9 19 2 1 8 30 28 28 22 MIN. QNH PRESSURE IN HPA 1002.3 999.0 1003.9 996.3 1006.8 1004.3 1003.0 1007.3 1010.4 1007.2 1003.2 1006.4 996.3 DAY 8 9 23 3 11 17 11 30 18 24 17 14 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 892.3 889.5 890.9 886.2 888.4 887.0 883.9 885.7 889.5 891.6 893.6 893.1 889.3 MAX. QFE PRESSURE IN HPA 900.6 900.0 900.7 894.8 896.0 892.8 888.7 893.9 896.2 900.0 899.0 901.9 901.9 DAY 31 1 14 9 19 1 5 8 30 28 28 21 MIN. QFE PRESSURE IN HPA 877.4 877.1 879.4 871.0 882.4 879.6 879.1 880.0 885.3 881.4 880.1 882.6 871.0 DAY 8 22 23 3 1 17 11 24 17 24 17 17 MEAN QNH PRESSURE IN HPA 1018.2 1015.1 1016.6 1011.4 1013.9 1012.3 1008.9 1010.9 1015.1 1017.4 1019.6 1019.2 1014.9 MAX. QNH PRESSURE IN HPA 1027.5 1026.8 1027.6 1021.0 1022.3 1018.8 1014.2 1020.0 1022.6 1026.8 1025.7 1028.9 1028.9 DAY 31 1 14 9 19 1 5 8 30 28 28 21 MIN. QNH PRESSURE IN HPA 1001.6 1001.3 1003.9 994.5 1007.2 1004.1 1003.5 1004.5 1010.4 1006.1 1004.6 1007.4 994.5 DAY 8 22 23 3 1 17 11 24 17 24 17 17 MEAN QFF PRESSURE IN HPA 1024.9 1019.7 1017.5 1010.5 1010.0 1006.5 1001.3 1003.5 1010.4 1016.4 1021.2 1022.8 1013.7 MAX. QFF PRESSURE IN HPA 1033.6 1033.4 1032.3 1023.2 1020.2 1013.9 1008.7 1013.5 1020.0 1030.3 1030.0 1036.0 1036.0 DAY 18 1 14 9 4 1 5 8 30 28 28 21 MIN. QFF PRESSURE IN HPA 1007.4 1005.3 1004.1 993.8 1002.6 997.9 995.6 997.1 1004.7 1006.1 1003.3 1007.3 993.8 DAY 8 22 23 3 15 17 20 24 17 24 17 14 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1966 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.2 5.7 9.2 14.7 18.6 25.7 28.8 29.0 21.4 14.5 9.9 4.9 15.7 MINIMUN AIR TEMPERATURE (C) -0.4 0.3 2.1 7.3 9.8 15.0 18.5 18.7 12.9 8.0 3.2 0.6 8.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 8 5 0 0 0 0 13 DAYS WITH MINIMUM TEMP. <=-4 6 3 0 0 0 0 0 0 0 0 0 2 11 DAYS WITH FREEZING MIN.<= 0 20 16 10 0 0 0 0 0 0 0 6 15 67 TEMPERATURE RECORDS LOWEST(C) -6.0 -4.0 -3.0 3.0 4.0 10.0 14.0 16.0 9.0 4.0 -1.0 -4.0 -6.0 DAY 14 7 2 1 8 15 8 6 28 18 25 5 MAXIMUM AIR TEMPERATURE (C) 11.4 10.3 14.4 19.5 24.0 31.9 34.8 35.3 27.5 19.3 14.7 8.5 21.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 22 29 30 10 0 0 0 93 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 17.0 18.0 19.0 27.0 30.0 38.0 40.0 39.0 36.0 25.0 21.0 14.0 40.0 DAY 6 26 16 30 30 7 26 3 8 5 1 9 DIF. BETWEEN (MAX.-MIN.) (C) 11.8 10.0 12.3 12.2 14.2 16.9 16.3 16.6 14.6 11.3 11.5 7.9 13.0 MEAN DAILY TEMP. (MDT) (C) 5.5 5.3 8.2 13.4 16.9 23.5 26.7 27.0 20.2 13.7 8.9 4.6 14.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.5 80.0 176.5 185.0 26.5 0.0 0.0 0.0 469.5 HEATING DEG. DAYS(BASE 18 0C) 386.5 355.5 303.0 138.0 62.0 0.0 0.0 0.0 12.5 134.5 271.5 415.5 2079.0 DEWPOINT (MEAN C) -1.7 -0.9 -0.9 4.7 7.6 9.2 9.9 11.0 9.7 8.2 4.0 -0.8 5.0 MIXING RATIO (G/KG) 3.85 4.10 4.11 6.20 7.56 8.49 8.86 9.56 8.69 7.74 5.78 4.13 6.59 VAPOUR PRESSURE (HPA) 5.49 5.84 5.81 8.72 10.63 11.88 12.37 13.33 12.19 10.92 8.22 5.84 9.27 SATURATION DEF. (HPA) 4.41 3.65 6.46 8.86 12.18 23.14 29.64 28.75 14.95 6.23 4.54 3.13 12.16 RELATIVE HUMIDITY (MEAN %) 61 66 53 55 53 39 34 36 53 68 69 69 55 RELATIVE HUMIDITY (MAX. %) 79 87 79 81 81 68 61 65 81 90 87 84 79 RELATIVE HUMIDITY (MIN. %) 45 48 36 38 37 23 21 22 34 51 53 55 39 RELATIVE HUMIDITY (MEAN% 03UTC) 77 85 79 80 80 68 61 65 80 90 87 80 78 RELATIVE HUMIDITY (MEAN% 09UTC) 52 57 43 44 45 31 27 29 41 58 58 62 46 RELATIVE HUMIDITY (MEAN% 15UTC) 54 61 46 47 45 32 24 24 47 64 67 67 48 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 30.2 27.5 35.2 49.5 59.7 8.7 1.8 2.4 37.8 79.2 0.1 11.8 343.9 DAYS WITH PRECIPITATION >=10 1 0 2 2 2 0 0 0 1 3 0 0 11 DAYS WITH PRECIPITATION >= 5 2 2 3 3 4 1 0 0 2 3 0 0 20 DAYS WITH PRECIPITATION >= 1 4 5 4 5 8 2 1 1 11 8 0 5 54 DAYS WITH PRECIPITATION 8 10 12 19 19 9 6 6 14 13 3 9 128 GREATEST DAILY PRECIPITATION 17.0 8.3 14.0 21.0 22.3 6.0 1.4 2.0 14.0 40.0 0.1 4.5 40.0 DAY 30 17 1 22 16 1 21 26 13 9 30 26 DAY WITH THUNDER STORM 0 0 1 4 6 5 2 2 4 2 0 0 26 DAYS WITH SNOW OR SLEET 2 2 1 0 0 0 0 0 0 0 0 1 6 DAYS WITH DUST 0 0 1 0 0 1 2 0 1 0 0 0 5 WIND DIRECTION (PREVAILING) 180 360 180 360 45 360 45 45 360 45 360 180 360 PREVAILING WIND SPEED(KNOTS) 8.4 4.5 7.8 4.9 5.5 5.7 5.3 5.6 4.9 3.2 2.7 7.9 4.9 PREVAILING WIND PERCENT 32.3 15.7 15.5 20.0 20.6 28.0 20.0 20.6 18.0 9.7 8.0 9.7 13.4 CALMS PERCENT OF WIND 54.2 67.1 63.2 0.7 26.5 29.3 36.8 34.2 50.0 72.9 76.7 60.0 47.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 175 104 162 74 56 29 37 44 26 47 211 178 84 VECTOR WIND MAGNITUDE(KNOTS) 2.8 0.3 1.2 0.4 1.2 2.4 1.2 1.4 1.2 0.3 0.2 1.4 0.5 WIND STEADINESES (MEAN %) 75.7 15.8 44.4 9.1 30.8 52.2 36.4 41.2 48.0 30.0 22.2 58.3 17.2 WIND SPEED (MEAN KNOTS) 3.7 1.9 2.7 4.4 3.9 4.6 3.3 3.4 2.5 1.0 0.9 2.4 2.9 FASTEST WIND DIRECTION 180 160 140 160 180 210 40 60 220 300 210 140 180 FASTEST WIND SPEED (KNOTS) 18 16 18 12 16 18 18 14 18 12 10 16 18 DAY 3 16 9 2 25 12 6 5 10 7 17 17 DAYS WITH SKY CLEAR (0-2)/8 8 12 11 6 10 28 26 28 14 14 14 7 178 DAYS WITH P.CLOUDY (3-6)/8 14 8 13 10 15 2 5 3 14 11 12 15 122 DAYS WITH CLOUDY (7-8)/8 9 8 7 14 6 0 0 0 2 6 4 9 65 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 892.8 891.6 886.2 884.4 885.6 882.3 880.7 880.8 885.4 889.5 893.6 886.5 886.6 MAX. QFE PRESSURE IN HPA 900.2 900.1 900.2 893.1 892.3 889.0 888.2 885.5 891.2 895.4 900.5 896.9 900.5 DAY-HOUR 1- 3 12- 6 2- 9 5- 6 18- 6 6- 6 8- 6 19- 6 16- 6 9- 6 23- 6 23- 6 MIN. QFE PRESSURE IN HPA 880.0 879.8 867.5 874.9 876.7 873.6 872.0 873.8 876.7 881.9 884.2 873.2 867.5 DAY-HOUR 26-15 2-12 19-15 8-15 3-15 13-12 4-15 3-15 8-15 15-12 30-12 18- 3 MEAN QNH PRESSURE IN HPA 1018.8 1017.4 1011.4 1009.4 1010.7 1007.0 1005.4 1005.4 1010.6 1015.1 1019.7 1011.8 1011.9 MAX. QNH PRESSURE IN HPA 1027.0 1026.9 1027.0 1019.1 1018.2 1014.6 1013.7 1010.7 1017.0 1021.7 1027.4 1023.3 1027.4 DAY-HOUR 1- 3 12- 6 2- 9 5- 6 18- 6 6- 6 8- 6 19- 6 16- 6 9- 6 23- 6 23- 6 MIN. QNH PRESSURE IN HPA 1004.5 1004.3 990.6 998.9 1000.9 997.4 995.6 997.6 1000.9 1006.6 1009.2 997.0 990.6 DAY-HOUR 26-15 2-12 19-15 8-15 3-15 13-12 4-15 3-15 8-15 15-12 30-12 18- 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 892.6 891.4 886.1 884.8 886.1 883.6 881.8 882.0 886.2 889.6 893.9 886.6 887.0 MAX. QFE PRESSURE IN HPA 900.2 898.7 899.8 892.4 891.9 888.3 887.8 884.7 890.5 894.1 899.4 895.8 900.2 DAY 1 12 3 26 18 7 8 19 16 9 23 23 MIN. QFE PRESSURE IN HPA 882.6 883.2 869.7 875.3 878.3 876.6 875.4 877.5 880.5 884.2 885.6 873.2 869.7 DAY 27 2 20 13 16 13 5 4 8 15 30 18 MEAN QNH PRESSURE IN HPA 1018.5 1017.2 1011.3 1009.9 1011.4 1008.5 1006.5 1006.7 1011.4 1015.3 1020.0 1011.9 1012.4 MAX. QNH PRESSURE IN HPA 1027.0 1025.4 1026.6 1018.3 1017.8 1013.8 1013.2 1009.8 1016.2 1020.2 1026.1 1022.1 1027.0 DAY 1 12 3 26 18 7 8 19 16 9 23 23 MIN. QNH PRESSURE IN HPA 1007.4 1008.1 993.1 999.3 1002.6 1000.7 999.4 1001.8 1005.1 1009.2 1010.8 997.0 993.1 DAY 27 2 20 13 16 13 5 4 8 15 30 18 MEAN QFF PRESSURE IN HPA 1020.2 1018.9 1011.5 1007.6 1007.4 1001.6 998.1 998.0 1006.1 1012.9 1019.9 1013.8 1009.7 MAX. QFF PRESSURE IN HPA 1030.1 1027.8 1028.5 1017.4 1016.2 1007.1 1007.2 1001.9 1012.8 1019.3 1027.4 1026.2 1030.1 DAY 1 12 3 5 18 17 8 6 15 18 23 23 MIN. QFF PRESSURE IN HPA 1007.2 1009.6 992.7 997.0 998.9 993.3 990.8 991.5 997.6 1006.7 1010.7 996.8 990.8 DAY 27 2 20 13 16 13 5 4 8 15 30 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 894.0 892.7 887.4 885.3 886.7 883.9 882.2 882.6 886.8 890.6 894.7 887.2 887.9 MAX. QFE PRESSURE IN HPA 900.0 900.1 900.1 893.1 892.3 889.0 888.2 885.5 891.2 895.4 900.5 896.9 900.5 DAY 1 12 3 5 18 6 8 19 16 9 23 23 MIN. QFE PRESSURE IN HPA 885.8 881.5 872.0 875.8 879.0 876.8 875.4 878.2 881.0 884.6 885.6 873.8 872.0 DAY 3 2 20 13 16 13 5 3 8 15 30 18 MEAN QNH PRESSURE IN HPA 1020.1 1018.7 1012.8 1010.5 1012.0 1008.9 1007.0 1007.4 1012.1 1016.3 1020.9 1012.6 1013.3 MAX. QNH PRESSURE IN HPA 1026.8 1026.9 1026.9 1019.1 1018.2 1014.6 1013.7 1010.7 1017.0 1021.7 1027.4 1023.3 1027.4 DAY 1 12 3 5 18 6 8 19 16 9 23 23 MIN. QNH PRESSURE IN HPA 1011.0 1006.2 995.6 999.9 1003.4 1001.0 999.4 1002.5 1005.7 1009.7 1010.8 997.6 995.6 DAY 3 2 20 13 16 13 5 3 8 15 30 18 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 893.6 892.5 886.9 884.7 886.1 882.8 881.4 881.5 885.9 890.0 894.1 886.9 887.2 MAX. QFE PRESSURE IN HPA 899.0 899.5 900.2 892.8 892.0 888.2 887.2 884.5 890.6 895.4 899.7 896.4 900.2 DAY 22 12 2 26 18 6 8 19 16 9 23 23 MIN. QFE PRESSURE IN HPA 885.2 881.2 873.0 875.7 880.0 874.9 874.5 877.0 879.0 883.5 884.8 873.8 873.0 DAY 30 2 19 13 16 13 5 3 8 15 30 18 MEAN QNH PRESSURE IN HPA 1019.7 1018.5 1012.2 1009.8 1011.3 1007.6 1006.1 1006.2 1011.1 1015.7 1020.2 1012.2 1012.6 MAX. QNH PRESSURE IN HPA 1025.7 1026.2 1027.0 1018.8 1017.9 1013.7 1012.6 1009.5 1016.3 1021.7 1026.5 1022.8 1027.0 DAY 22 12 2 26 18 6 8 19 16 9 23 23 MIN. QNH PRESSURE IN HPA 1010.3 1005.9 996.7 999.7 1004.5 998.9 998.4 1001.2 1003.4 1008.4 1009.9 997.6 996.7 DAY 30 2 19 13 16 13 5 3 8 15 30 18 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 891.9 890.7 885.3 883.7 884.7 880.8 879.6 879.4 884.1 888.7 892.7 885.7 885.6 MAX. QFE PRESSURE IN HPA 896.9 897.0 899.0 891.5 890.3 886.8 885.7 882.6 889.1 894.4 897.9 895.2 899.0 DAY 22 12 2 26 9 6 7 18 21 9 23 23 MIN. QFE PRESSURE IN HPA 882.5 879.8 868.9 875.5 877.6 873.6 873.1 874.8 877.0 881.9 884.2 874.0 868.9 DAY 26 2 19 8 3 13 5 3 8 15 30 18 MEAN QNH PRESSURE IN HPA 1017.8 1016.4 1010.5 1008.7 1009.7 1005.5 1004.1 1003.9 1009.1 1014.2 1018.7 1010.9 1010.8 MAX. QNH PRESSURE IN HPA 1023.3 1023.5 1025.7 1017.3 1016.0 1012.1 1010.9 1007.4 1014.7 1020.6 1024.5 1021.5 1025.7 DAY 22 12 2 26 9 6 7 18 21 9 23 23 MIN. QNH PRESSURE IN HPA 1007.3 1004.3 992.2 999.5 1001.9 997.4 996.9 998.7 1001.2 1006.6 1009.2 997.9 992.2 DAY 26 2 19 8 3 13 5 3 8 15 30 18 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 891.9 890.7 885.3 883.5 884.3 880.2 878.8 878.6 884.1 888.5 892.7 886.1 885.4 MAX. QFE PRESSURE IN HPA 897.3 897.3 899.1 891.0 889.9 886.2 884.8 881.6 889.5 893.7 898.0 895.2 899.1 DAY 22 12 2 25 9 6 7 15 21 9 23 23 MIN. QFE PRESSURE IN HPA 880.0 880.0 867.5 874.9 876.7 874.6 872.0 873.8 876.7 881.9 884.8 875.1 867.5 DAY 26 2 19 8 3 13 4 3 8 15 30 17 MEAN QNH PRESSURE IN HPA 1017.8 1016.4 1010.5 1008.5 1009.3 1004.8 1003.1 1003.0 1009.1 1014.0 1018.7 1011.3 1010.5 MAX. QNH PRESSURE IN HPA 1023.8 1023.8 1025.8 1016.8 1015.6 1011.4 1009.9 1006.3 1015.1 1019.8 1024.6 1021.5 1025.8 DAY 22 12 2 25 9 6 7 15 21 9 23 23 MIN. QNH PRESSURE IN HPA 1004.5 1004.5 990.6 998.9 1000.9 998.5 995.6 997.6 1000.9 1006.6 1009.9 999.1 990.6 DAY 26 2 19 8 3 13 4 3 8 15 30 17 MEAN QFF PRESSURE IN HPA 1019.5 1018.0 1010.7 1006.1 1005.3 997.8 994.7 994.4 1003.9 1011.6 1018.6 1013.2 1007.8 MAX. QFF PRESSURE IN HPA 1026.1 1026.0 1028.2 1015.4 1013.3 1003.2 1003.6 998.4 1011.2 1018.9 1026.1 1025.4 1028.2 DAY 22 12 2 4 9 2 7 6 21 9 23 23 MIN. QFF PRESSURE IN HPA 1003.6 1006.6 990.8 996.0 996.7 991.6 987.2 988.3 993.3 1003.6 1010.1 998.4 987.2 DAY 26 28 19 8 3 12 4 3 8 15 30 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1967 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.3 -3.8 5.2 11.8 18.3 21.7 26.3 27.0 20.9 15.4 7.7 2.3 12.8 MINIMUN AIR TEMPERATURE (C) -4.1 -8.5 -0.5 4.7 10.9 11.8 17.5 17.5 11.4 7.6 2.9 -2.0 5.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 4 0 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 16 23 5 0 0 0 0 0 0 0 4 11 59 DAYS WITH FREEZING MIN.<= 0 25 28 18 3 0 0 0 0 0 0 10 20 104 TEMPERATURE RECORDS LOWEST(C) -13.0 -21.0 -8.0 -3.0 7.0 4.0 15.0 15.0 7.0 4.0 -6.0 -13.0 -21.0 DAY 22 3 9 1 1 5 3 28 25 14 28 24 MAXIMUM AIR TEMPERATURE (C) 4.1 0.1 9.2 16.2 23.3 27.0 31.8 32.9 26.9 20.7 11.5 6.0 17.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 8 28 30 12 0 0 0 79 DAYS WITH MAXIMUM TEMP. <= 0 9 12 0 0 0 0 0 0 0 0 0 8 29 TEMPERATURE RECORDS HIGHEST(C) 14.0 7.0 14.0 20.0 30.0 34.0 35.0 37.0 33.0 25.0 21.0 14.0 37.0 DAY 15 23 16 16 23 16 15 4 3 7 1 17 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 8.6 9.7 11.5 12.4 15.2 14.3 15.4 15.5 13.1 8.6 8.0 11.7 MEAN DAILY TEMP. (MDT) (C) 0.0 -4.2 4.3 10.4 17.1 19.4 24.6 25.2 19.1 14.1 7.2 2.0 11.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.5 15.5 113.0 130.5 18.5 0.0 0.0 0.0 278.0 HEATING DEG. DAYS(BASE 18 0C) 558.0 622.5 423.5 227.0 42.5 24.0 0.0 0.0 23.5 120.0 323.0 495.0 2859.0 DEWPOINT (MEAN C) -5.6 -8.0 -2.5 1.1 9.1 7.0 11.3 11.1 8.7 6.4 2.1 -3.5 3.1 MIXING RATIO (G/KG) 2.93 2.58 3.69 4.86 8.33 7.34 9.68 9.58 8.09 6.87 5.38 3.45 6.07 VAPOUR PRESSURE (HPA) 4.15 3.66 5.20 6.84 11.69 10.29 13.49 13.36 11.35 9.72 7.61 4.89 8.52 SATURATION DEF. (HPA) 2.54 1.28 3.99 7.50 10.22 17.16 21.96 23.88 14.88 8.45 3.57 2.82 9.85 RELATIVE HUMIDITY (MEAN %) 66 73 61 52 58 43 42 40 50 59 70 68 57 RELATIVE HUMIDITY (MAX. %) 80 84 81 78 84 72 68 69 79 84 86 80 79 RELATIVE HUMIDITY (MIN. %) 53 63 46 35 41 28 29 27 32 42 57 56 42 RELATIVE HUMIDITY (MEAN% 03UTC) 78 82 79 77 84 72 68 69 78 83 84 78 78 RELATIVE HUMIDITY (MEAN% 09UTC) 58 69 54 44 48 33 35 33 39 48 62 59 49 RELATIVE HUMIDITY (MEAN% 15UTC) 63 71 53 42 50 34 32 28 40 52 69 66 50 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 22.2 33.0 57.8 22.2 120.9 11.4 0.9 0.2 19.3 20.2 34.4 12.6 355.1 DAYS WITH PRECIPITATION >=10 1 1 3 0 4 0 0 0 0 0 0 0 9 DAYS WITH PRECIPITATION >= 5 2 3 4 1 6 0 0 0 2 1 2 2 23 DAYS WITH PRECIPITATION >= 1 6 8 5 7 16 5 0 0 6 6 10 2 71 DAYS WITH PRECIPITATION 7 10 11 14 24 12 4 5 11 15 14 7 134 GREATEST DAILY PRECIPITATION 11.2 11.5 25.0 5.0 25.0 3.0 0.4 0.2 7.0 9.0 9.0 6.2 25.0 DAY 30 24 8 25 25 10 19 14 23 13 8 23 DAY WITH THUNDER STORM 0 0 0 2 12 9 1 3 5 6 4 2 44 DAYS WITH SNOW OR SLEET 4 10 1 0 0 0 0 0 0 0 2 2 19 DAYS WITH DUST 0 0 0 3 0 0 0 5 0 0 0 0 8 WIND DIRECTION (PREVAILING) 180 45 180 180 360 45 45 45 45 360 45 225 45 PREVAILING WIND SPEED(KNOTS) 8.9 4.5 7.7 7.9 3.5 5.7 5.7 4.6 4.5 3.4 3.3 6.5 4.8 PREVAILING WIND PERCENT 20.6 7.9 19.4 22.0 15.5 25.3 36.1 27.1 20.7 9.0 8.0 20.0 14.0 CALMS PERCENT OF WIND 50.3 77.1 45.2 38.0 43.2 28.7 28.4 34.8 46.7 56.1 63.3 51.0 46.7 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 193 25 191 170 100 26 34 23 44 122 152 191 126 VECTOR WIND MAGNITUDE(KNOTS) 3.0 0.4 2.1 1.7 0.4 1.2 2.9 2.2 1.3 0.3 0.8 2.0 0.4 WIND STEADINESES (MEAN %) 76.9 50.0 60.0 42.5 13.3 29.3 80.6 78.6 56.5 18.8 42.1 64.5 13.8 WIND SPEED (MEAN KNOTS) 3.9 0.8 3.5 4.0 3.0 4.1 3.6 2.8 2.3 1.6 1.9 3.1 2.9 FASTEST WIND DIRECTION 210 60 180 180 90 220 30 330 360 180 150 180 210 FASTEST WIND SPEED (KNOTS) 22 10 18 18 16 16 12 14 14 12 18 20 22 DAY 15 17 16 21 4 3 2 13 5 11 22 22 DAYS WITH SKY CLEAR (0-2)/8 12 7 6 6 8 19 26 29 20 13 9 9 164 DAYS WITH P.CLOUDY (3-6)/8 12 8 17 14 13 9 5 1 10 13 12 12 126 DAYS WITH CLOUDY (7-8)/8 7 13 8 10 10 2 0 1 0 5 9 10 75 DAYS WITH VISIBILITY =< 2 KM 1 2 1 0 1 0 0 0 0 0 1 0 6 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 887.9 886.6 882.6 882.4 885.1 883.1 880.5 880.8 884.0 889.8 887.8 886.6 884.8 MAX. QFE PRESSURE IN HPA 897.1 897.6 893.1 892.2 891.6 889.1 888.0 886.1 891.7 897.8 895.1 895.8 897.8 DAY-HOUR 6- 6 28- 6 1- 6 9- 6 3- 6 2- 6 23- 6 15- 6 25- 6 15- 6 30- 6 12- 6 MIN. QFE PRESSURE IN HPA 876.0 870.7 873.3 871.7 877.9 874.8 874.1 874.7 875.9 880.5 877.8 871.3 870.7 DAY-HOUR 18-12 23-15 22-12 25-15 31- 3 22-15 4-15 4-15 7-15 11-12 22-12 23- 3 MEAN QNH PRESSURE IN HPA 1013.3 1011.8 1007.4 1007.2 1010.2 1008.0 1005.1 1005.4 1009.0 1015.4 1013.2 1011.9 1009.8 MAX. QNH PRESSURE IN HPA 1023.6 1024.1 1019.1 1018.1 1017.5 1014.7 1013.4 1011.3 1017.6 1024.3 1021.3 1022.1 1024.3 DAY-HOUR 6- 6 28- 6 1- 6 9- 6 3- 6 2- 6 23- 6 15- 6 25- 6 15- 6 30- 6 12- 6 MIN. QNH PRESSURE IN HPA 1000.1 994.2 997.1 995.3 1002.2 998.7 998.0 998.6 1000.0 1005.1 1002.1 994.8 994.2 DAY-HOUR 18-12 23-15 22-12 25-15 31- 3 22-15 4-15 4-15 7-15 11-12 22-12 23- 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 887.9 886.3 882.8 882.8 885.4 884.2 881.7 881.8 884.9 890.0 887.9 886.6 885.2 MAX. QFE PRESSURE IN HPA 895.2 896.4 892.9 891.0 891.1 888.8 887.3 885.8 891.5 896.7 894.0 895.2 896.7 DAY 6 28 1 9 3 13 23 15 25 15 30 12 MIN. QFE PRESSURE IN HPA 878.0 871.2 874.2 872.9 877.9 878.9 878.4 877.7 878.7 882.0 877.9 871.3 871.2 DAY 18 24 27 25 31 19 10 5 17 11 25 23 MEAN QNH PRESSURE IN HPA 1013.4 1011.6 1007.7 1007.6 1010.6 1009.2 1006.4 1006.6 1010.0 1015.7 1013.4 1011.9 1010.3 MAX. QNH PRESSURE IN HPA 1021.5 1022.8 1018.9 1016.8 1016.9 1014.3 1012.7 1011.0 1017.3 1023.1 1020.1 1021.5 1023.1 DAY 6 28 1 9 3 13 23 15 25 15 30 12 MIN. QNH PRESSURE IN HPA 1002.3 994.7 998.1 996.6 1002.2 1003.3 1002.8 1002.0 1003.1 1006.8 1002.2 994.8 994.7 DAY 18 24 27 25 31 19 10 5 17 11 25 23 MEAN QFF PRESSURE IN HPA 1017.6 1018.0 1009.5 1006.5 1006.4 1003.9 998.6 998.5 1004.9 1013.0 1013.9 1015.2 1008.8 MAX. QFF PRESSURE IN HPA 1028.2 1034.7 1023.7 1017.5 1013.3 1011.7 1005.1 1002.8 1014.3 1022.1 1025.5 1025.6 1034.7 DAY 26 3 1 13 2 6 23 15 25 15 30 27 MIN. QFF PRESSURE IN HPA 1003.7 998.1 997.3 994.5 998.3 996.3 994.9 992.1 996.4 1003.3 1004.4 996.7 992.1 DAY 17 24 27 25 31 18 10 5 17 11 23 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 888.9 887.3 883.5 883.4 886.0 884.4 882.1 882.4 885.5 891.0 888.7 887.6 885.9 MAX. QFE PRESSURE IN HPA 897.1 897.6 893.1 892.2 891.6 889.1 888.0 886.1 891.7 897.8 895.1 895.8 897.8 DAY 6 28 1 9 3 2 23 15 25 15 30 12 MIN. QFE PRESSURE IN HPA 878.3 874.1 874.5 873.1 878.7 879.2 878.5 878.5 879.4 882.5 879.1 876.0 873.1 DAY 18 24 27 25 31 20 10 5 17 11 25 23 MEAN QNH PRESSURE IN HPA 1014.4 1012.7 1008.4 1008.3 1011.2 1009.5 1006.9 1007.2 1010.6 1016.8 1014.3 1013.0 1011.1 MAX. QNH PRESSURE IN HPA 1023.6 1024.1 1019.1 1018.1 1017.5 1014.7 1013.4 1011.3 1017.6 1024.3 1021.3 1022.1 1024.3 DAY 6 28 1 9 3 2 23 15 25 15 30 12 MIN. QNH PRESSURE IN HPA 1002.6 998.0 998.4 996.9 1003.1 1003.6 1002.9 1002.9 1003.9 1007.3 1003.5 1000.1 996.9 DAY 18 24 27 25 31 20 10 5 17 11 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 888.3 887.2 883.1 882.8 885.4 883.5 881.1 881.4 884.5 890.4 888.1 886.8 885.2 MAX. QFE PRESSURE IN HPA 896.2 897.2 892.1 891.6 891.0 888.5 886.8 885.2 890.8 896.9 894.4 895.3 897.2 DAY 6 28 1 9 2 12 23 15 24 15 30 11 MIN. QFE PRESSURE IN HPA 876.9 876.1 874.5 872.8 878.0 877.3 877.6 877.5 878.2 881.6 879.5 875.0 872.8 DAY 18 23 22 25 31 22 10 5 17 11 22 3 MEAN QNH PRESSURE IN HPA 1013.8 1012.5 1007.9 1007.6 1010.6 1008.4 1005.8 1006.1 1009.6 1016.1 1013.6 1012.2 1010.3 MAX. QNH PRESSURE IN HPA 1022.6 1023.7 1018.0 1017.5 1016.8 1014.0 1012.1 1010.3 1016.6 1023.3 1020.6 1021.6 1023.7 DAY 6 28 1 9 2 12 23 15 24 15 30 11 MIN. QNH PRESSURE IN HPA 1001.1 1000.2 998.4 996.5 1002.3 1001.5 1001.9 1001.8 1002.5 1006.3 1004.0 999.0 996.5 DAY 18 23 22 25 31 22 10 5 17 11 22 3 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 887.0 886.0 881.9 881.6 884.3 882.0 879.3 879.6 882.9 888.9 887.0 885.8 883.9 MAX. QFE PRESSURE IN HPA 894.7 895.4 889.9 890.3 889.9 887.6 884.5 883.3 889.8 895.2 893.2 894.4 895.4 DAY 6 28 1 9 2 5 22 15 24 15 30 11 MIN. QFE PRESSURE IN HPA 876.0 872.7 873.3 871.9 878.0 875.3 875.1 876.1 876.3 880.5 877.8 873.3 871.9 DAY 18 23 22 25 31 22 4 4 17 11 22 22 MEAN QNH PRESSURE IN HPA 1012.4 1011.2 1006.7 1006.4 1009.4 1006.7 1003.7 1004.1 1007.7 1014.4 1012.4 1011.0 1008.8 MAX. QNH PRESSURE IN HPA 1020.9 1021.7 1015.6 1016.0 1015.6 1013.0 1009.5 1008.2 1015.4 1021.5 1019.2 1020.6 1021.7 DAY 6 28 1 9 2 5 22 15 24 15 30 11 MIN. QNH PRESSURE IN HPA 1000.1 996.4 997.1 995.5 1002.3 999.3 999.1 1000.2 1000.4 1005.1 1002.1 997.1 995.5 DAY 18 23 22 25 31 22 4 4 17 11 22 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 887.4 886.0 881.7 881.4 884.2 881.6 878.4 878.7 882.5 888.7 887.3 886.2 883.7 MAX. QFE PRESSURE IN HPA 894.8 894.8 889.5 889.7 889.9 887.7 883.7 882.4 889.7 895.0 893.6 894.6 895.0 DAY 6 27 1 9 2 5 22 15 24 14 30 11 MIN. QFE PRESSURE IN HPA 877.1 870.7 873.5 871.7 878.6 874.8 874.1 874.7 875.9 881.6 877.8 871.8 870.7 DAY 18 23 22 25 30 22 4 4 7 11 22 22 MEAN QNH PRESSURE IN HPA 1012.8 1011.3 1006.4 1006.1 1009.2 1006.3 1002.7 1003.1 1007.4 1014.2 1012.7 1011.5 1008.6 MAX. QNH PRESSURE IN HPA 1021.0 1021.0 1015.1 1015.3 1015.6 1013.1 1008.7 1007.2 1015.3 1021.2 1019.7 1020.8 1021.2 DAY 6 27 1 9 2 5 22 15 24 14 30 11 MIN. QNH PRESSURE IN HPA 1001.3 994.2 997.3 995.3 1003.0 998.7 998.0 998.6 1000.0 1006.3 1002.1 995.4 994.2 DAY 18 23 22 25 30 22 4 4 7 11 22 22 MEAN QFF PRESSURE IN HPA 1017.0 1017.6 1008.1 1004.9 1004.9 1001.0 994.8 995.0 1002.2 1011.6 1013.2 1014.7 1007.1 MAX. QFF PRESSURE IN HPA 1027.6 1033.2 1019.9 1015.7 1012.1 1012.0 1001.0 999.8 1012.0 1019.8 1024.7 1025.2 1033.2 DAY 23 3 9 12 2 5 22 28 24 14 30 27 MIN. QFF PRESSURE IN HPA 1000.8 997.3 997.7 993.2 998.3 992.1 990.3 988.7 992.9 1002.2 1000.9 996.2 988.7 DAY 15 23 25 25 29 22 10 4 7 11 22 22 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1968 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.1 -0.7 6.6 13.9 18.8 20.8 28.0 26.4 23.7 16.7 9.5 2.7 13.8 MINIMUN AIR TEMPERATURE (C) -5.2 -5.4 0.5 7.2 12.0 12.9 17.2 15.9 12.9 8.5 4.0 0.1 6.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 0 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 17 16 4 0 0 0 0 0 0 0 0 1 38 DAYS WITH FREEZING MIN.<= 0 25 24 17 0 0 0 0 0 0 0 0 20 86 TEMPERATURE RECORDS LOWEST(C) -15.0 -19.0 -5.0 2.0 9.0 6.0 12.0 13.0 10.0 3.0 1.0 -6.0 -19.0 DAY 27 7 15 4 1 8 13 19 24 28 22 14 MAXIMUM AIR TEMPERATURE (C) 2.6 3.4 11.4 18.4 23.7 26.1 33.8 32.5 30.1 22.0 13.6 5.4 18.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 5 26 29 20 0 0 0 80 DAYS WITH MAXIMUM TEMP. <= 0 16 11 0 0 0 0 0 0 0 0 0 2 29 TEMPERATURE RECORDS HIGHEST(C) 10.0 17.0 19.0 27.0 28.0 35.0 38.0 36.0 34.0 27.0 17.0 11.0 38.0 DAY 6 29 13 14 22 28 20 15 3 3 8 1 DIF. BETWEEN (MAX.-MIN.) (C) 7.8 8.8 10.9 11.2 11.7 13.2 16.6 16.6 17.2 13.5 9.6 5.3 11.9 MEAN DAILY TEMP. (MDT) (C) -1.3 -1.0 5.9 12.8 17.9 19.5 25.5 24.2 21.5 15.2 8.8 2.8 12.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.5 14.0 140.5 101.0 28.0 0.0 0.0 0.0 284.0 HEATING DEG. DAYS(BASE 18 0C) 598.0 551.0 375.0 158.5 25.0 16.5 0.0 0.0 0.0 87.5 276.0 472.0 2559.5 DEWPOINT (MEAN C) -7.4 -6.2 -3.0 4.0 9.1 10.0 10.3 9.5 7.2 6.4 4.6 -0.8 3.6 MIXING RATIO (G/KG) 2.58 2.92 3.59 5.87 8.34 8.90 9.16 8.62 7.36 6.86 6.05 4.13 6.20 VAPOUR PRESSURE (HPA) 3.65 4.14 5.06 8.27 11.73 12.45 12.78 12.04 10.34 9.68 8.57 5.84 8.71 SATURATION DEF. (HPA) 2.41 2.43 5.12 8.41 10.75 13.49 27.14 24.25 20.72 10.42 3.57 1.78 10.88 RELATIVE HUMIDITY (MEAN %) 65 69 54 56 57 54 37 39 39 55 73 79 56 RELATIVE HUMIDITY (MAX. %) 78 82 76 80 82 83 68 71 71 78 89 88 79 RELATIVE HUMIDITY (MIN. %) 52 57 39 42 42 37 22 23 23 39 60 69 42 RELATIVE HUMIDITY (MEAN% 03UTC) 75 81 73 79 82 83 67 70 70 78 88 86 78 RELATIVE HUMIDITY (MEAN% 09UTC) 56 63 46 48 48 44 29 30 30 45 66 74 48 RELATIVE HUMIDITY (MEAN% 15UTC) 62 64 47 48 52 48 27 27 27 46 68 78 50 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 13.2 16.8 12.1 77.8 120.0 52.9 8.0 6.0 1.1 19.2 25.7 57.1 409.9 DAYS WITH PRECIPITATION >=10 0 0 0 2 4 1 0 0 0 0 1 2 10 DAYS WITH PRECIPITATION >= 5 0 2 0 6 5 4 1 0 0 2 3 5 28 DAYS WITH PRECIPITATION >= 1 4 3 5 10 14 12 1 3 1 6 7 10 76 DAYS WITH PRECIPITATION 5 6 13 18 23 22 2 4 7 16 11 17 144 GREATEST DAILY PRECIPITATION 4.0 8.0 3.1 21.0 37.0 16.0 8.0 3.0 1.0 6.3 10.0 12.0 37.0 DAY 25 2 10 25 29 6 1 18 2 25 10 5 DAY WITH THUNDER STORM 0 0 2 4 20 22 2 5 3 1 0 0 59 DAYS WITH SNOW OR SLEET 4 4 2 0 0 0 0 0 0 0 0 8 18 DAYS WITH DUST 3 0 1 0 0 0 0 1 1 0 0 0 6 WIND DIRECTION (PREVAILING) 225 225 45 45 45 45 45 45 45 45 180 45 45 PREVAILING WIND SPEED(KNOTS) 7.8 8.4 4.4 3.5 3.8 3.9 4.4 3.0 4.6 4.1 4.9 3.1 3.8 PREVAILING WIND PERCENT 18.1 11.0 15.5 17.3 11.6 22.0 21.3 17.4 15.3 10.3 10.7 12.3 13.4 CALMS PERCENT OF WIND 54.2 66.2 43.2 54.0 51.6 44.7 43.9 44.5 44.0 55.5 66.0 63.9 52.6 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 195 189 163 16 308 38 71 69 74 80 196 172 144 VECTOR WIND MAGNITUDE(KNOTS) 2.7 1.4 1.1 0.5 0.1 1.0 1.1 1.0 0.6 0.3 0.7 0.4 0.4 WIND STEADINESES (MEAN %) 77.1 66.7 33.3 26.3 4.8 47.6 50.0 47.6 26.1 17.6 50.0 28.6 18.2 WIND SPEED (MEAN KNOTS) 3.5 2.1 3.3 1.9 2.1 2.1 2.2 2.1 2.3 1.7 1.4 1.4 2.2 FASTEST WIND DIRECTION 200 180 180 300 270 130 40 130 120 330 180 180 200 FASTEST WIND SPEED (KNOTS) 22 16 22 12 16 16 12 14 16 15 9 10 22 DAY 14 29 13 13 4 18 11 16 4 9 23 27 DAYS WITH SKY CLEAR (0-2)/8 13 7 12 9 2 10 28 29 27 18 5 3 163 DAYS WITH P.CLOUDY (3-6)/8 9 9 9 9 19 18 3 1 2 6 13 6 104 DAYS WITH CLOUDY (7-8)/8 9 13 10 12 10 2 0 1 1 7 12 22 99 DAYS WITH VISIBILITY =< 2 KM 2 4 0 0 0 0 0 0 0 0 0 7 13 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 883.0 887.8 884.6 885.9 886.6 883.4 881.7 881.4 884.9 888.0 889.3 886.4 885.2 MAX. QFE PRESSURE IN HPA 896.4 899.5 897.9 892.0 892.5 890.7 886.9 887.4 892.0 896.3 894.0 897.5 899.5 DAY-HOUR 1- 6 5- 6 27- 3 4- 6 23- 6 2- 6 12- 6 27- 6 17- 6 16- 6 24- 6 22- 6 MIN. QFE PRESSURE IN HPA 868.9 877.7 868.5 874.5 880.2 877.3 874.6 873.3 878.3 878.7 884.0 875.3 868.5 DAY-HOUR 10- 9 20-15 14- 9 24- 3 16-12 18-15 5-15 2-15 11-15 24-15 29-12 15-12 MEAN QNH PRESSURE IN HPA 1007.8 1013.2 1009.6 1011.1 1011.8 1008.3 1006.4 1006.1 1010.0 1013.4 1014.9 1011.7 1010.4 MAX. QNH PRESSURE IN HPA 1022.8 1026.2 1024.5 1017.9 1018.4 1016.4 1012.2 1012.8 1017.9 1022.7 1020.1 1024.0 1026.2 DAY-HOUR 1- 6 5- 6 27- 3 4- 6 23- 6 2- 6 12- 6 27- 6 17- 6 16- 6 24- 6 22- 6 MIN. QNH PRESSURE IN HPA 992.2 1002.0 991.7 998.4 1004.8 1001.5 998.5 997.1 1002.6 1003.1 1009.0 999.3 991.7 DAY-HOUR 10- 9 20-15 14- 9 24- 3 16-12 18-15 5-15 2-15 11-15 24-15 29-12 15-12 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 883.2 887.8 884.9 886.2 887.0 884.3 882.7 882.4 885.6 888.4 889.4 886.1 885.7 MAX. QFE PRESSURE IN HPA 895.0 898.8 897.9 891.0 891.7 890.5 886.5 886.9 891.2 895.7 892.7 896.0 898.8 DAY 1 5 27 12 23 2 13 27 18 16 22 23 MIN. QFE PRESSURE IN HPA 871.2 878.8 868.8 874.5 881.9 878.5 877.7 877.7 881.7 879.7 884.6 876.0 868.8 DAY 10 21 14 24 30 5 5 6 9 25 29 12 MEAN QNH PRESSURE IN HPA 1008.1 1013.2 1010.0 1011.4 1012.3 1009.4 1007.6 1007.2 1010.8 1013.9 1015.0 1011.4 1010.9 MAX. QNH PRESSURE IN HPA 1021.2 1025.5 1024.5 1016.8 1017.6 1016.2 1011.8 1012.2 1017.0 1022.0 1018.7 1022.3 1025.5 DAY 1 5 27 12 23 2 13 27 18 16 22 23 MIN. QNH PRESSURE IN HPA 994.7 1003.2 992.1 998.4 1006.6 1002.9 1002.0 1002.0 1006.4 1004.2 1009.7 1000.1 992.1 DAY 10 21 14 24 30 5 5 6 9 25 29 12 MEAN QFF PRESSURE IN HPA 1012.9 1018.2 1011.3 1009.4 1007.9 1004.3 999.6 999.6 1004.6 1010.5 1014.7 1013.8 1008.9 MAX. QFF PRESSURE IN HPA 1027.5 1035.6 1026.5 1016.7 1012.5 1014.3 1006.4 1007.6 1011.7 1018.3 1019.1 1026.6 1035.6 DAY 20 6 27 4 3 8 13 19 17 16 22 23 MIN. QFF PRESSURE IN HPA 995.5 1003.2 989.9 997.1 1002.7 997.5 993.9 993.8 999.6 1002.4 1008.9 999.7 989.9 DAY 10 29 14 24 16 5 5 6 9 4 29 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 883.9 888.6 885.7 886.9 887.6 884.5 883.1 882.9 886.3 889.3 890.4 887.1 886.4 MAX. QFE PRESSURE IN HPA 896.4 899.5 896.2 892.0 892.5 890.7 886.9 887.4 892.0 896.3 894.0 897.5 899.5 DAY 1 5 26 4 23 2 12 27 17 16 24 22 MIN. QFE PRESSURE IN HPA 870.2 880.0 868.7 875.5 882.3 878.1 878.0 878.0 882.3 881.0 885.6 877.1 868.7 DAY 10 21 14 24 30 5 5 2 9 25 29 27 MEAN QNH PRESSURE IN HPA 1008.8 1014.1 1010.8 1012.3 1013.0 1009.6 1008.0 1007.8 1011.6 1014.9 1016.1 1012.4 1011.6 MAX. QNH PRESSURE IN HPA 1022.8 1026.2 1022.6 1017.9 1018.4 1016.4 1012.2 1012.8 1017.9 1022.7 1020.1 1024.0 1026.2 DAY 1 5 26 4 23 2 12 27 17 16 24 22 MIN. QNH PRESSURE IN HPA 993.6 1004.5 992.0 999.5 1007.1 1002.4 1002.3 1002.3 1007.1 1005.7 1010.8 1001.3 992.0 DAY 10 21 14 24 30 5 5 2 9 25 29 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 883.3 888.3 885.0 886.4 887.0 883.8 882.3 881.9 885.4 888.5 889.7 886.9 885.7 MAX. QFE PRESSURE IN HPA 896.0 899.3 895.9 891.6 891.6 889.7 886.4 886.3 891.5 895.5 893.6 896.9 899.3 DAY 1 5 26 27 23 2 12 24 18 16 24 22 MIN. QFE PRESSURE IN HPA 868.9 879.6 868.5 875.7 881.8 878.7 876.7 876.4 881.3 880.2 885.3 877.5 868.5 DAY 10 20 14 23 16 5 5 2 11 25 29 27 MEAN QNH PRESSURE IN HPA 1008.2 1013.8 1010.1 1011.7 1012.3 1008.7 1007.1 1006.6 1010.6 1014.0 1015.3 1012.2 1010.9 MAX. QNH PRESSURE IN HPA 1022.3 1026.0 1022.2 1017.5 1017.5 1015.3 1011.7 1011.5 1017.3 1021.8 1019.7 1023.3 1026.0 DAY 1 5 26 27 23 2 12 24 18 16 24 22 MIN. QNH PRESSURE IN HPA 992.2 1004.1 991.7 999.7 1006.5 1003.1 1000.9 1000.5 1006.0 1004.8 1010.4 1001.8 991.7 DAY 10 20 14 23 16 5 5 2 11 25 29 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 882.1 887.1 883.7 885.2 885.8 882.3 880.6 880.2 883.7 887.0 888.5 885.9 884.3 MAX. QFE PRESSURE IN HPA 895.4 897.9 894.5 890.6 889.8 889.1 885.4 884.7 890.0 894.8 892.3 896.5 897.9 DAY 1 5 26 27 3 7 12 18 17 16 21 22 MIN. QFE PRESSURE IN HPA 870.0 878.3 872.1 875.0 880.2 877.4 875.0 874.3 879.3 879.1 884.0 875.3 870.0 DAY 10 20 13 23 16 18 5 2 11 25 29 15 MEAN QNH PRESSURE IN HPA 1006.9 1012.5 1008.7 1010.3 1011.0 1007.1 1005.2 1004.8 1008.7 1012.3 1014.0 1011.1 1009.4 MAX. QNH PRESSURE IN HPA 1021.7 1024.5 1020.7 1016.3 1015.4 1014.7 1010.5 1009.8 1015.7 1021.0 1018.2 1022.9 1024.5 DAY 1 5 26 27 3 7 12 18 17 16 21 22 MIN. QNH PRESSURE IN HPA 993.4 1002.6 995.7 999.0 1004.8 1001.6 999.0 998.2 1003.8 1003.5 1009.0 999.3 993.4 DAY 10 20 13 23 16 18 5 2 11 25 29 15 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 882.4 887.1 883.7 885.0 885.5 882.1 879.7 879.5 883.3 886.8 888.7 886.2 884.2 MAX. QFE PRESSURE IN HPA 895.7 897.8 897.2 890.2 889.2 888.7 884.6 885.7 889.5 894.0 892.3 896.4 897.8 DAY 1 4 26 27 3 7 12 18 17 15 21 22 MIN. QFE PRESSURE IN HPA 870.1 877.7 872.2 875.0 881.0 877.3 874.6 873.3 878.3 878.7 884.7 876.4 870.1 DAY 15 20 9 23 16 18 5 2 11 24 1 15 MEAN QNH PRESSURE IN HPA 1007.2 1012.4 1008.6 1010.1 1010.7 1006.8 1004.3 1004.0 1008.3 1012.1 1014.2 1011.4 1009.2 MAX. QNH PRESSURE IN HPA 1022.0 1024.3 1023.7 1015.9 1014.8 1014.2 1009.7 1010.9 1015.1 1020.1 1018.2 1022.8 1024.3 DAY 1 4 26 27 3 7 12 18 17 15 21 22 MIN. QNH PRESSURE IN HPA 993.5 1002.0 995.9 999.0 1005.7 1001.5 998.5 997.1 1002.6 1003.1 1009.8 1000.5 993.5 DAY 15 20 9 23 16 18 5 2 11 24 1 15 MEAN QFF PRESSURE IN HPA 1012.0 1017.2 1009.9 1008.0 1006.3 1001.7 996.2 996.5 1002.2 1008.7 1013.8 1014.0 1007.2 MAX. QFF PRESSURE IN HPA 1028.2 1034.7 1025.6 1014.7 1011.2 1012.8 1003.8 1005.8 1009.7 1015.9 1018.3 1026.9 1034.7 DAY 19 5 26 27 3 7 12 18 17 27 21 22 MIN. QFF PRESSURE IN HPA 995.6 1002.1 993.7 997.5 1000.8 994.1 989.5 989.3 996.3 1000.0 1008.8 1001.3 989.3 DAY 15 28 13 23 16 28 4 1 11 3 26 11 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1969 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.5 -2.9 7.1 11.8 18.8 24.3 26.0 26.9 20.3 13.3 5.9 5.1 12.8 MINIMUN AIR TEMPERATURE (C) -5.2 -6.7 2.9 6.2 11.1 14.8 16.9 17.4 11.4 8.2 0.4 0.8 6.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 1 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 21 21 1 0 0 0 0 0 0 0 0 1 44 DAYS WITH FREEZING MIN.<= 0 29 27 6 1 0 0 0 0 0 2 18 13 96 TEMPERATURE RECORDS LOWEST(C) -18.0 -18.0 -4.0 0.0 7.0 11.0 12.0 14.0 5.0 -3.0 -3.0 -4.0 -18.0 DAY 31 3 24 14 7 1 6 10 12 30 18 16 MAXIMUM AIR TEMPERATURE (C) 0.2 0.6 10.7 16.0 23.9 30.3 31.6 33.1 26.6 17.8 10.7 9.2 17.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 19 23 30 9 0 0 0 83 DAYS WITH MAXIMUM TEMP. <= 0 17 14 0 0 0 0 0 0 0 0 0 0 31 TEMPERATURE RECORDS HIGHEST(C) 6.0 13.0 21.0 25.0 30.0 37.0 36.0 37.0 34.0 28.0 17.0 15.0 37.0 DAY 14 28 30 26 13 10 13 21 4 2 6 5 DIF. BETWEEN (MAX.-MIN.) (C) 5.4 7.3 7.8 9.8 12.8 15.5 14.7 15.7 15.2 9.6 10.3 8.4 11.1 MEAN DAILY TEMP. (MDT) (C) -2.5 -3.1 6.8 11.1 17.5 22.6 24.3 25.2 19.0 13.0 5.5 5.0 12.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 3.0 62.5 104.0 131.5 26.0 0.0 0.0 0.0 327.0 HEATING DEG. DAYS(BASE 18 0C) 636.0 589.5 347.5 206.0 40.0 1.0 0.0 0.0 36.0 158.5 373.5 402.5 2790.5 DEWPOINT (MEAN C) -5.4 -5.8 1.9 3.5 7.9 9.4 10.6 11.2 7.7 7.6 0.6 -0.6 4.0 MIXING RATIO (G/KG) 2.97 2.96 5.05 5.77 7.66 8.56 9.23 9.58 7.62 7.60 4.55 4.22 6.31 VAPOUR PRESSURE (HPA) 4.21 4.20 7.10 8.11 10.77 11.97 12.89 13.40 10.71 10.71 6.47 5.97 8.88 SATURATION DEF. (HPA) 1.04 1.03 3.55 6.64 11.96 20.27 22.32 23.76 14.88 5.35 3.25 3.08 9.76 RELATIVE HUMIDITY (MEAN %) 82 81 72 61 53 44 41 41 49 71 70 69 61 RELATIVE HUMIDITY (MAX. %) 90 90 87 82 78 72 67 69 77 89 87 83 81 RELATIVE HUMIDITY (MIN. %) 73 72 59 47 37 27 28 26 31 56 57 55 47 RELATIVE HUMIDITY (MEAN% 03UTC) 87 86 86 81 78 69 67 69 76 87 86 82 80 RELATIVE HUMIDITY (MEAN% 09UTC) 78 79 69 53 45 33 33 33 38 64 63 62 54 RELATIVE HUMIDITY (MEAN% 15UTC) 79 80 64 57 45 42 33 30 43 67 65 65 56 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 39.9 26.6 69.7 47.9 38.3 23.6 8.5 8.0 32.2 55.6 32.0 19.0 401.3 DAYS WITH PRECIPITATION >=10 1 0 3 1 1 0 0 0 2 0 1 0 9 DAYS WITH PRECIPITATION >= 5 1 2 6 3 2 1 1 1 3 6 3 1 30 DAYS WITH PRECIPITATION >= 1 10 5 10 11 8 5 1 1 4 13 3 7 78 DAYS WITH PRECIPITATION 18 18 16 18 19 14 4 3 6 17 3 9 145 GREATEST DAILY PRECIPITATION 14.3 9.0 13.0 15.0 20.0 8.0 8.1 8.0 13.0 9.0 19.0 6.4 20.0 DAY 23 20 6 30 7 18 5 2 10 21 9 23 DAY WITH THUNDER STORM 0 0 0 2 4 6 4 0 1 0 0 0 17 DAYS WITH SNOW OR SLEET 14 14 6 1 0 0 0 0 0 1 1 0 37 DAYS WITH DUST 0 0 0 0 0 0 0 0 1 0 0 0 1 WIND DIRECTION (PREVAILING) 225 360 45 45 45 360 45 45 45 45 225 225 45 PREVAILING WIND SPEED(KNOTS) 6.3 2.2 3.8 3.5 4.1 4.4 3.5 3.2 4.5 4.2 8.6 7.2 3.8 PREVAILING WIND PERCENT 11.0 10.7 12.3 20.7 27.3 14.7 21.3 22.6 12.0 5.8 4.7 8.4 12.6 CALMS PERCENT OF WIND 70.3 79.3 58.7 41.3 35.7 36.0 37.4 42.6 68.7 81.3 89.3 81.9 60.1 NO. OF WIND OBSERVATION 155 140 155 150 154 150 155 155 150 155 150 155 1824 VECTOR WIND DIRECTION (MEAN) 209 353 143 78 68 60 31 43 43 64 180 198 80 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.1 0.8 0.7 1.1 0.5 1.0 0.9 0.7 0.3 0.6 0.7 0.3 WIND STEADINESES (MEAN %) 46.2 14.3 38.1 31.8 39.3 17.9 43.5 50.0 58.3 30.0 60.0 63.6 17.6 WIND SPEED (MEAN KNOTS) 1.3 0.7 2.1 2.2 2.8 2.8 2.3 1.8 1.2 1.0 1.0 1.1 1.7 FASTEST WIND DIRECTION 210 220 180 180 180 50 210 360 30 60 180 180 220 FASTEST WIND SPEED (KNOTS) 12 16 15 9 14 12 12 9 10 12 14 10 16 DAY 12 13 21 1 14 14 10 9 26 29 8 5 DAYS WITH SKY CLEAR (0-2)/8 4 3 0 4 5 17 24 26 16 7 18 11 135 DAYS WITH P.CLOUDY (3-6)/8 4 6 7 9 15 10 7 5 12 10 6 16 107 DAYS WITH CLOUDY (7-8)/8 23 19 24 17 11 3 0 0 2 14 6 4 123 DAYS WITH VISIBILITY =< 2 KM 7 0 1 0 0 0 0 0 0 1 0 0 9 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 886.6 888.1 882.7 883.8 885.2 882.6 881.7 883.2 886.5 887.8 890.8 887.0 885.5 MAX. QFE PRESSURE IN HPA 895.7 899.3 892.1 891.2 894.4 889.0 887.7 893.2 894.8 896.7 897.1 895.5 899.3 DAY-HOUR 9- 9 4- 6 12- 6 22- 6 21- 6 1- 6 6- 6 31- 6 13- 6 10- 6 22- 6 10- 6 MIN. QFE PRESSURE IN HPA 876.3 874.4 870.0 870.0 877.0 873.6 875.9 873.5 877.6 875.7 877.1 876.4 870.0 DAY-HOUR 22-15 8-15 20-12 17-12 14-15 17-12 14-15 14-15 9-12 29- 3 8-12 13-12 MEAN QNH PRESSURE IN HPA 1011.9 1013.5 1007.5 1008.8 1010.3 1007.5 1006.4 1008.1 1011.8 1013.3 1016.6 1012.4 1010.7 MAX. QNH PRESSURE IN HPA 1022.0 1026.0 1018.0 1017.0 1020.6 1014.6 1013.1 1019.2 1021.0 1023.1 1023.6 1021.8 1026.0 DAY-HOUR 9- 9 4- 6 12- 6 22- 6 21- 6 1- 6 6- 6 31- 6 13- 6 10- 6 22- 6 10- 6 MIN. QNH PRESSURE IN HPA 1000.4 998.3 993.4 993.4 1001.2 997.4 1000.0 997.3 1001.9 999.7 1001.3 1000.5 993.4 DAY-HOUR 22-15 8-15 20-12 17-12 14-15 17-12 14-15 14-15 9-12 29- 3 8-12 13-12 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 886.5 888.0 882.8 884.0 885.5 883.6 882.7 884.3 887.1 888.1 890.8 887.2 885.9 MAX. QFE PRESSURE IN HPA 894.9 897.8 891.2 890.2 894.0 888.5 887.2 892.3 893.2 895.6 895.5 895.0 897.8 DAY 9 4 12 22 21 2 6 31 14 10 22 10 MIN. QFE PRESSURE IN HPA 876.8 876.1 873.0 872.4 879.1 878.0 878.3 879.4 881.3 875.7 880.1 878.5 872.4 DAY 20 13 21 13 3 24 14 4 7 29 8 31 MEAN QNH PRESSURE IN HPA 1011.8 1013.4 1007.7 1009.0 1010.7 1008.6 1007.5 1009.3 1012.5 1013.6 1016.6 1012.5 1011.1 MAX. QNH PRESSURE IN HPA 1021.1 1024.3 1017.0 1015.9 1020.1 1014.0 1012.6 1018.2 1019.2 1021.9 1021.8 1021.2 1024.3 DAY 9 4 12 22 21 2 6 31 14 10 22 10 MIN. QNH PRESSURE IN HPA 1001.0 1000.2 996.7 996.1 1003.5 1002.3 1002.6 1003.9 1006.0 999.7 1004.6 1002.9 996.1 DAY 20 13 21 13 3 24 14 4 7 29 8 31 MEAN QFF PRESSURE IN HPA 1017.0 1019.3 1008.2 1007.7 1006.5 1002.2 1000.0 1001.4 1007.8 1011.5 1018.4 1014.4 1009.5 MAX. QFF PRESSURE IN HPA 1028.5 1033.6 1019.3 1014.3 1016.4 1009.2 1008.3 1011.0 1016.8 1020.8 1024.4 1024.7 1033.6 DAY 9 4 12 22 17 1 6 31 14 10 22 10 MIN. QFF PRESSURE IN HPA 1003.8 1003.4 994.9 993.9 998.6 994.7 993.3 995.8 999.1 998.4 1002.7 1003.5 993.3 DAY 20 13 21 1 3 24 14 4 7 29 8 13 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 887.2 888.9 883.5 884.6 886.2 883.9 883.2 884.8 887.9 888.9 892.1 888.2 886.6 MAX. QFE PRESSURE IN HPA 895.6 899.3 892.1 891.2 894.4 889.0 887.7 893.2 894.8 896.7 897.1 895.5 899.3 DAY 9 4 12 22 21 1 6 31 13 10 22 10 MIN. QFE PRESSURE IN HPA 877.5 876.4 872.0 872.3 880.3 879.0 878.5 879.8 881.3 876.4 880.3 879.0 872.0 DAY 20 13 20 1 3 18 14 14 7 29 8 31 MEAN QNH PRESSURE IN HPA 1012.6 1014.4 1008.4 1009.7 1011.5 1008.9 1008.0 1009.9 1013.4 1014.5 1018.0 1013.6 1011.9 MAX. QNH PRESSURE IN HPA 1021.9 1026.0 1018.0 1017.0 1020.6 1014.6 1013.1 1019.2 1021.0 1023.1 1023.6 1021.8 1026.0 DAY 9 4 12 22 21 1 6 31 13 10 22 10 MIN. QNH PRESSURE IN HPA 1001.8 1000.5 995.6 996.0 1004.9 1003.4 1002.9 1004.3 1006.0 1000.5 1004.9 1003.4 995.6 DAY 20 13 20 1 3 18 14 14 7 29 8 31 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 887.2 888.7 883.2 884.2 885.7 883.0 882.2 883.9 887.1 888.4 891.5 887.7 886.1 MAX. QFE PRESSURE IN HPA 895.7 899.0 891.6 890.7 894.0 888.6 886.1 892.3 894.2 896.5 896.5 894.9 899.0 DAY 9 4 12 22 21 1 6 31 13 9 22 10 MIN. QFE PRESSURE IN HPA 877.9 875.5 871.0 870.5 880.2 876.8 878.0 878.2 879.4 876.4 879.2 878.0 870.5 DAY 22 13 20 17 25 17 14 14 9 29 8 13 MEAN QNH PRESSURE IN HPA 1012.6 1014.2 1008.1 1009.2 1010.8 1007.9 1007.0 1008.9 1012.4 1013.9 1017.4 1013.1 1011.3 MAX. QNH PRESSURE IN HPA 1022.0 1025.7 1017.5 1016.4 1020.1 1014.1 1011.3 1018.2 1020.3 1022.9 1022.9 1021.1 1025.7 DAY 9 4 12 22 21 1 6 31 13 9 22 10 MIN. QNH PRESSURE IN HPA 1002.2 999.5 994.5 994.0 1004.8 1001.0 1002.3 1002.5 1003.9 1000.5 1003.6 1002.3 994.0 DAY 22 13 20 17 25 17 14 14 9 29 8 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 886.0 887.4 882.0 883.2 884.4 881.5 880.5 882.0 885.4 887.0 889.9 886.2 884.6 MAX. QFE PRESSURE IN HPA 894.4 897.7 889.2 888.6 892.8 887.6 885.1 890.7 892.7 894.8 895.2 893.0 897.7 DAY 9 2 12 22 21 1 5 31 13 9 22 10 MIN. QFE PRESSURE IN HPA 877.0 875.2 870.0 870.0 878.3 873.6 876.6 875.3 877.6 878.1 877.1 876.4 870.0 DAY 22 8 20 17 14 17 14 14 9 19 8 13 MEAN QNH PRESSURE IN HPA 1011.2 1012.8 1006.7 1008.1 1009.5 1006.2 1005.1 1006.8 1010.6 1012.3 1015.6 1011.4 1009.7 MAX. QNH PRESSURE IN HPA 1020.6 1024.2 1014.8 1014.1 1018.8 1013.0 1010.2 1016.4 1018.7 1021.0 1021.5 1019.0 1024.2 DAY 9 2 12 22 21 1 5 31 13 9 22 10 MIN. QNH PRESSURE IN HPA 1001.2 999.2 993.4 993.4 1002.6 997.4 1000.7 999.3 1001.9 1002.4 1001.3 1000.5 993.4 DAY 22 8 20 17 14 17 14 14 9 19 8 13 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 886.1 887.5 881.9 883.2 884.2 881.2 879.7 881.3 885.1 886.8 889.7 886.0 884.4 MAX. QFE PRESSURE IN HPA 894.4 897.4 889.2 888.3 892.4 887.0 884.8 889.7 892.1 895.2 895.2 893.0 897.4 DAY 9 4 24 24 21 1 5 31 13 9 22 10 MIN. QFE PRESSURE IN HPA 876.3 874.4 870.0 870.3 877.0 874.6 875.9 873.5 877.8 877.3 879.5 877.4 870.0 DAY 22 8 20 12 14 23 14 14 9 28 8 13 MEAN QNH PRESSURE IN HPA 1011.3 1012.9 1006.7 1008.1 1009.2 1005.9 1004.2 1005.9 1010.3 1012.2 1015.4 1011.2 1009.4 MAX. QNH PRESSURE IN HPA 1020.6 1023.9 1014.8 1013.8 1018.3 1012.3 1009.9 1015.3 1018.0 1021.5 1021.5 1019.0 1023.9 DAY 9 4 24 24 21 1 5 31 13 9 22 10 MIN. QNH PRESSURE IN HPA 1000.4 998.3 993.4 993.7 1001.2 998.5 1000.0 997.3 1002.1 1001.5 1004.0 1001.6 993.4 DAY 22 8 20 12 14 23 14 14 9 28 8 13 MEAN QFF PRESSURE IN HPA 1016.6 1018.6 1007.1 1006.7 1004.9 999.4 996.6 998.1 1005.5 1010.1 1017.1 1013.0 1007.8 MAX. QFF PRESSURE IN HPA 1027.5 1034.1 1019.3 1013.7 1013.9 1007.0 1004.4 1008.6 1016.0 1020.2 1023.7 1022.0 1034.1 DAY 9 2 24 14 21 1 5 31 13 9 22 10 MIN. QFF PRESSURE IN HPA 1003.2 1003.0 991.7 992.4 994.5 991.4 990.9 989.0 995.6 999.6 1003.4 1002.1 989.0 DAY 22 8 20 17 14 23 14 14 9 28 8 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1970 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.9 5.7 9.3 16.1 20.2 25.4 27.5 27.1 22.0 14.4 10.7 0.6 15.1 MINIMUN AIR TEMPERATURE (C) -1.8 0.1 3.0 8.7 12.1 15.6 18.4 18.2 11.7 5.7 4.9 -1.9 7.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 4 0 0 0 0 6 DAYS WITH MINIMUM TEMP. <=-4 9 2 0 0 0 0 0 0 0 0 0 10 21 DAYS WITH FREEZING MIN.<= 0 24 17 7 0 0 0 0 0 0 0 0 21 69 TEMPERATURE RECORDS LOWEST(C) -10.0 -5.0 -3.0 2.0 6.0 10.0 16.0 15.0 9.0 1.0 1.0 -7.0 -10.0 DAY 28 21 11 22 11 10 26 26 13 30 14 15 MAXIMUM AIR TEMPERATURE (C) 5.5 10.6 14.3 21.8 25.7 31.1 32.9 32.9 28.5 20.3 15.7 3.0 20.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 8 25 30 29 13 0 0 0 105 DAYS WITH MAXIMUM TEMP. <= 0 2 0 1 0 0 0 0 0 0 0 0 11 14 TEMPERATURE RECORDS HIGHEST(C) 10.0 16.0 25.0 29.0 32.0 34.0 38.0 38.0 33.0 28.0 22.0 13.0 38.0 DAY 18 28 31 14 23 15 20 13 23 5 4 5 DIF. BETWEEN (MAX.-MIN.) (C) 7.3 10.5 11.3 13.1 13.6 15.5 14.5 14.7 16.8 14.6 10.8 4.9 12.3 MEAN DAILY TEMP. (MDT) (C) 1.8 5.4 8.6 15.2 18.9 23.3 25.7 25.5 20.1 13.0 10.3 0.5 14.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 13.5 81.0 144.5 141.5 16.5 0.0 0.0 0.0 397.0 HEATING DEG. DAYS(BASE 18 0C) 501.5 354.0 290.5 88.5 29.0 0.5 0.0 0.0 2.5 158.5 231.0 541.5 2197.5 DEWPOINT (MEAN C) -3.5 -2.5 -0.3 3.5 6.0 9.5 11.0 15.6 7.0 2.9 3.2 -5.1 3.9 MIXING RATIO (G/KG) 3.42 3.67 4.35 5.73 6.74 8.67 9.51 12.83 7.30 5.48 5.57 3.10 6.36 VAPOUR PRESSURE (HPA) 4.86 5.18 6.14 8.08 9.47 12.12 13.26 17.80 10.25 7.75 7.88 4.41 8.93 SATURATION DEF. (HPA) 2.36 4.41 6.47 11.23 15.68 21.97 24.90 19.57 17.77 9.75 5.54 2.35 11.83 RELATIVE HUMIDITY (MEAN %) 69 58 54 46 43 39 38 52 41 51 62 69 52 RELATIVE HUMIDITY (MAX. %) 83 75 70 67 60 55 56 76 64 71 80 78 70 RELATIVE HUMIDITY (MIN. %) 56 43 41 32 31 29 27 37 27 34 47 57 38 RELATIVE HUMIDITY (MEAN% 03UTC) 81 71 69 65 58 55 56 76 64 71 78 76 68 RELATIVE HUMIDITY (MEAN% 09UTC) 62 51 48 38 36 35 32 46 33 41 54 67 45 RELATIVE HUMIDITY (MEAN% 15UTC) 66 50 47 41 38 31 31 40 32 41 54 66 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 22.9 4.9 5.6 30.3 15.0 1.0 16.0 1.6 0.0 9.6 39.6 14.4 160.9 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 1 0 0 0 1 0 2 DAYS WITH PRECIPITATION >= 5 3 0 0 2 1 0 2 0 0 1 2 0 11 DAYS WITH PRECIPITATION >= 1 5 2 3 9 4 1 2 1 0 1 5 7 40 DAYS WITH PRECIPITATION 9 4 7 9 7 3 2 3 0 3 5 9 61 GREATEST DAILY PRECIPITATION 6.1 2.5 1.6 9.0 8.0 1.0 10.0 1.0 0.0 9.0 28.0 3.0 28.0 DAY 21 19 12 19 10 18 2 8 ** 14 29 22 DAY WITH THUNDER STORM 0 0 0 2 2 0 1 0 0 1 1 0 7 DAYS WITH SNOW OR SLEET 5 1 3 0 0 0 0 0 0 0 0 6 15 DAYS WITH DUST 1 0 0 0 1 0 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 180 180 45 135 180 45 45 45 45 45 225 225 45 PREVAILING WIND SPEED(KNOTS) 7.9 8.7 6.6 7.0 8.7 6.2 4.4 4.4 5.6 4.5 5.0 6.0 5.6 PREVAILING WIND PERCENT 9.0 12.1 5.8 9.3 9.0 14.0 6.5 12.3 6.7 5.2 4.0 1.3 6.3 CALMS PERCENT OF WIND 78.7 65.0 78.1 61.3 56.8 61.3 85.8 73.5 86.0 86.5 88.7 98.1 76.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 171 179 145 169 169 53 17 57 143 165 181 223 146 VECTOR WIND MAGNITUDE(KNOTS) 0.7 1.7 0.9 1.3 1.0 1.3 0.4 0.7 0.2 0.2 0.2 0.1 0.4 WIND STEADINESES (MEAN %) 41.2 63.0 52.9 43.3 28.6 46.4 57.1 46.7 18.2 25.0 40.0 100.0 23.5 WIND SPEED (MEAN KNOTS) 1.7 2.7 1.7 3.0 3.5 2.8 0.7 1.5 1.1 0.8 0.5 0.1 1.7 FASTEST WIND DIRECTION 210 180 180 180 150 330 330 280 230 180 210 240 180 FASTEST WIND SPEED (KNOTS) 16 20 16 16 16 20 10 14 16 10 8 8 20 DAY 31 4 18 7 14 9 1 7 29 28 9 31 DAYS WITH SKY CLEAR (0-2)/8 9 9 8 9 17 26 25 27 30 22 13 4 199 DAYS WITH P.CLOUDY (3-6)/8 8 15 9 13 9 4 6 4 0 8 13 10 99 DAYS WITH CLOUDY (7-8)/8 14 4 14 8 5 0 0 0 0 1 4 17 67 DAYS WITH VISIBILITY =< 2 KM 2 0 0 0 0 0 0 0 0 0 0 1 3 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 887.1 885.5 884.9 886.4 883.2 882.4 881.1 881.1 884.0 887.5 888.4 889.0 885.1 MAX. QFE PRESSURE IN HPA 894.0 893.9 894.1 896.3 888.5 889.0 886.2 889.2 892.5 896.7 897.7 898.9 898.9 DAY-HOUR 4- 6 16- 6 5- 9 22- 6 9- 6 11- 9 31- 6 29- 6 18- 6 11-15 14- 6 30- 6 MIN. QFE PRESSURE IN HPA 876.7 872.0 872.6 870.0 875.5 875.4 875.0 873.0 876.4 877.0 882.0 873.0 870.0 DAY-HOUR 22-12 18-12 19-12 19-15 15-12 20-15 10-15 27-15 30-12 6-15 3-15 10-15 MEAN QNH PRESSURE IN HPA 1012.5 1010.7 1010.0 1011.6 1008.1 1007.2 1005.8 1005.8 1009.0 1012.9 1013.9 1014.5 1010.2 MAX. QNH PRESSURE IN HPA 1020.1 1020.0 1020.2 1022.7 1014.0 1014.6 1011.4 1014.8 1018.4 1023.1 1024.2 1025.6 1025.6 DAY-HOUR 4- 6 16- 6 5- 9 22- 6 9- 6 11- 9 31- 6 29- 6 18- 6 11-15 14- 6 30- 6 MIN. QNH PRESSURE IN HPA 1000.9 995.6 996.3 993.4 999.5 999.4 999.0 996.7 1000.5 1001.2 1006.8 996.7 993.4 DAY-HOUR 22-12 18-12 19-12 19-15 15-12 20-15 10-15 27-15 30-12 6-15 3-15 10-15 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 886.9 885.5 885.2 886.7 883.8 883.8 882.1 882.3 885.1 887.9 888.7 888.7 885.6 MAX. QFE PRESSURE IN HPA 892.6 892.8 892.2 895.0 888.1 888.2 886.0 887.4 891.4 893.7 895.0 898.0 898.0 DAY 3 16 5 22 9 12 23 29 18 11 14 30 MIN. QFE PRESSURE IN HPA 878.3 874.0 873.2 873.2 877.2 879.7 879.4 876.1 878.5 879.0 885.0 877.7 873.2 DAY 22 19 19 19 15 3 13 27 30 6 11 10 MEAN QNH PRESSURE IN HPA 1012.2 1010.7 1010.3 1012.0 1008.7 1008.8 1006.9 1007.1 1010.2 1013.4 1014.2 1014.3 1010.7 MAX. QNH PRESSURE IN HPA 1018.6 1018.8 1018.1 1021.2 1013.6 1013.7 1011.2 1012.8 1017.2 1019.8 1021.2 1024.6 1024.6 DAY 3 16 5 22 9 12 23 29 18 11 14 30 MIN. QNH PRESSURE IN HPA 1002.6 997.9 997.0 997.0 1001.4 1004.2 1003.9 1000.2 1002.9 1003.4 1010.1 1002.0 997.0 DAY 22 19 19 19 15 3 13 27 30 6 11 10 MEAN QFF PRESSURE IN HPA 1015.5 1012.4 1010.4 1009.2 1004.4 1002.0 998.9 998.9 1005.0 1011.6 1013.6 1018.1 1008.3 MAX. QFF PRESSURE IN HPA 1022.2 1020.9 1018.5 1021.7 1011.0 1010.2 1003.3 1005.8 1013.0 1019.1 1022.1 1029.2 1029.2 DAY 3 6 5 22 10 10 23 29 18 11 14 30 MIN. QFF PRESSURE IN HPA 1005.0 998.0 996.3 993.8 995.9 997.2 995.4 992.1 996.7 998.8 1009.0 1004.6 992.1 DAY 22 19 19 19 15 3 13 27 30 6 11 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 888.1 886.5 886.0 887.7 884.4 884.1 882.8 883.1 885.8 889.1 889.8 889.7 886.4 MAX. QFE PRESSURE IN HPA 894.0 893.9 894.0 896.3 888.5 888.6 886.2 889.2 892.5 895.5 897.7 898.9 898.9 DAY 4 16 5 22 9 11 31 29 18 31 14 30 MIN. QFE PRESSURE IN HPA 879.0 876.7 874.2 873.2 877.2 880.0 879.7 877.0 879.1 879.7 886.5 877.2 873.2 DAY 22 18 19 19 15 20 10 27 30 6 11 10 MEAN QNH PRESSURE IN HPA 1013.5 1011.8 1011.2 1013.1 1009.5 1009.1 1007.6 1008.0 1011.0 1014.7 1015.5 1015.3 1011.7 MAX. QNH PRESSURE IN HPA 1020.1 1020.0 1020.1 1022.7 1014.0 1014.1 1011.4 1014.8 1018.4 1021.8 1024.2 1025.6 1025.6 DAY 4 16 5 22 9 11 31 29 18 31 14 30 MIN. QNH PRESSURE IN HPA 1003.4 1000.9 998.1 997.0 1001.4 1004.5 1004.2 1001.2 1003.5 1004.2 1011.8 1001.4 997.0 DAY 22 18 19 19 15 20 10 27 30 6 11 10 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 888.0 886.5 885.5 887.0 883.6 882.9 881.6 881.8 884.4 887.9 888.8 889.5 885.6 MAX. QFE PRESSURE IN HPA 893.0 893.4 894.1 895.0 887.5 889.0 886.0 888.2 891.0 895.0 897.0 898.6 898.6 DAY 2 16 5 22 9 11 31 29 18 11 14 30 MIN. QFE PRESSURE IN HPA 878.5 875.2 874.0 872.8 876.1 878.2 878.6 876.0 877.0 879.0 884.7 875.2 872.8 DAY 22 18 19 19 15 20 13 27 30 6 11 10 MEAN QNH PRESSURE IN HPA 1013.4 1011.7 1010.6 1012.4 1008.5 1007.7 1006.3 1006.5 1009.4 1013.3 1014.3 1015.1 1010.8 MAX. QNH PRESSURE IN HPA 1019.0 1019.5 1020.2 1021.2 1012.9 1014.6 1011.2 1013.7 1016.8 1021.2 1023.5 1025.2 1025.2 DAY 2 16 5 22 9 11 31 29 18 11 14 30 MIN. QNH PRESSURE IN HPA 1002.9 999.2 997.9 996.5 1000.2 1002.5 1003.0 1000.1 1001.2 1003.4 1009.8 999.2 996.5 DAY 22 18 19 19 15 20 13 27 30 6 11 10 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 886.5 884.7 884.0 885.5 882.4 881.0 880.0 879.7 882.6 886.3 887.5 888.5 884.1 MAX. QFE PRESSURE IN HPA 892.0 891.5 891.6 893.8 887.0 887.0 883.6 886.0 889.3 894.0 895.3 897.5 897.5 DAY 2 16 5 22 9 11 31 29 18 11 14 30 MIN. QFE PRESSURE IN HPA 876.7 872.0 872.6 871.0 875.5 876.6 876.0 873.5 876.4 877.7 883.0 873.6 871.0 DAY 22 18 19 19 15 20 13 27 30 6 3 10 MEAN QNH PRESSURE IN HPA 1011.8 1009.8 1009.0 1010.7 1007.2 1005.6 1004.5 1004.2 1007.5 1011.6 1012.9 1014.0 1009.1 MAX. QNH PRESSURE IN HPA 1017.9 1017.3 1017.5 1019.9 1012.3 1012.3 1008.5 1011.2 1014.9 1020.1 1021.6 1024.0 1024.0 DAY 2 16 5 22 9 11 31 29 18 11 14 30 MIN. QNH PRESSURE IN HPA 1000.9 995.6 996.3 994.5 999.5 1000.7 1000.1 997.3 1000.5 1002.0 1007.9 997.4 994.5 DAY 22 18 19 19 15 20 13 27 30 6 3 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 886.3 884.5 883.8 885.1 882.0 880.1 879.1 878.7 882.3 886.3 887.3 888.5 883.7 MAX. QFE PRESSURE IN HPA 891.5 891.0 891.0 893.0 886.8 885.8 883.0 885.0 889.3 896.7 895.0 897.5 897.5 DAY 3 16 5 22 9 11 31 29 18 11 14 31 MIN. QFE PRESSURE IN HPA 877.5 873.0 873.3 870.0 875.5 875.4 875.0 873.0 876.6 877.0 882.0 873.0 870.0 DAY 22 18 19 19 15 20 10 27 30 6 3 10 MEAN QNH PRESSURE IN HPA 1011.5 1009.5 1008.7 1010.2 1006.7 1004.7 1003.5 1003.1 1007.1 1011.5 1012.7 1014.0 1008.6 MAX. QNH PRESSURE IN HPA 1017.3 1016.8 1016.8 1019.0 1012.1 1011.0 1007.9 1010.1 1014.9 1023.1 1021.2 1024.0 1024.0 DAY 3 16 5 22 9 11 31 29 18 11 14 31 MIN. QNH PRESSURE IN HPA 1001.8 996.7 997.1 993.4 999.5 999.4 999.0 996.7 1000.7 1001.2 1006.8 996.7 993.4 DAY 22 18 19 19 15 20 10 27 30 6 3 10 MEAN QFF PRESSURE IN HPA 1014.8 1011.1 1008.7 1007.4 1002.2 997.6 995.4 994.7 1001.9 1009.8 1012.1 1017.9 1006.1 MAX. QFF PRESSURE IN HPA 1022.9 1019.7 1017.2 1018.9 1011.3 1006.3 999.3 1002.9 1010.7 1022.4 1022.3 1028.6 1028.6 DAY 28 3 5 22 9 11 23 29 18 11 14 31 MIN. QFF PRESSURE IN HPA 1004.7 995.7 995.8 991.4 993.3 991.9 990.7 988.6 994.6 996.4 1004.9 999.1 988.6 DAY 22 18 18 19 26 20 10 27 6 6 3 10 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1971 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.1 0.4 10.2 12.5 19.9 23.0 26.3 24.3 22.6 12.9 7.5 -0.2 12.9 MINIMUN AIR TEMPERATURE (C) -8.0 -4.3 3.7 6.2 11.7 14.1 14.3 13.2 9.3 3.5 0.1 -5.2 4.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 19 13 0 0 0 0 0 0 0 0 3 16 51 DAYS WITH FREEZING MIN.<= 0 30 23 9 0 0 0 0 0 0 4 17 27 110 TEMPERATURE RECORDS LOWEST(C) -19.0 -17.0 -3.0 1.0 9.0 10.0 11.0 11.0 6.0 -2.0 -5.0 -14.0 -19.0 DAY 26 2 16 3 2 5 10 29 21 27 20 20 MAXIMUM AIR TEMPERATURE (C) -2.2 4.6 15.5 17.0 25.7 28.4 32.6 30.5 30.2 19.3 12.8 3.9 18.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 3 9 30 24 21 0 0 0 87 DAYS WITH MAXIMUM TEMP. <= 0 20 6 0 0 0 0 0 0 0 0 0 11 37 TEMPERATURE RECORDS HIGHEST(C) 5.0 14.0 21.0 27.0 32.0 33.0 35.0 33.0 33.0 25.0 18.0 13.0 35.0 DAY 2 27 18 29 7 21 4 3 4 6 14 2 DIF. BETWEEN (MAX.-MIN.) (C) 5.8 8.9 11.8 10.8 14.0 14.3 18.3 17.3 20.9 15.8 12.7 9.1 13.3 MEAN DAILY TEMP. (MDT) (C) -5.1 0.2 9.6 11.6 18.7 21.2 23.5 21.9 19.7 11.4 6.4 -0.6 11.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 5.5 27.0 76.5 28.5 7.0 0.0 0.0 0.0 144.5 HEATING DEG. DAYS(BASE 18 0C) 716.0 498.5 261.5 194.0 11.0 2.0 0.0 0.0 5.5 204.5 347.0 577.5 2817.5 DEWPOINT (MEAN C) -9.9 -6.0 0.0 3.1 9.0 9.5 12.4 10.8 7.4 3.1 0.2 -6.0 2.8 MIXING RATIO (G/KG) 2.18 3.01 4.43 5.53 8.34 8.64 10.56 9.37 7.43 5.47 4.45 2.95 6.03 VAPOUR PRESSURE (HPA) 3.12 4.25 6.25 7.77 11.69 12.07 14.67 13.07 10.45 7.74 6.31 4.18 8.46 SATURATION DEF. (HPA) 1.37 2.59 6.85 7.70 12.59 17.38 21.48 19.08 19.59 8.37 4.56 2.35 10.33 RELATIVE HUMIDITY (MEAN %) 71 64 53 56 53 44 47 47 44 57 63 67 56 RELATIVE HUMIDITY (MAX. %) 80 78 72 75 75 62 86 86 88 89 88 85 80 RELATIVE HUMIDITY (MIN. %) 60 50 38 41 36 34 30 28 22 37 44 49 39 RELATIVE HUMIDITY (MEAN% 03UTC) 77 74 69 73 74 62 86 86 88 89 88 83 79 RELATIVE HUMIDITY (MEAN% 09UTC) 67 61 44 51 44 39 34 35 29 44 53 60 47 RELATIVE HUMIDITY (MEAN% 15UTC) 68 59 46 48 46 38 36 32 28 41 52 58 46 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 24.1 6.4 33.0 47.0 93.0 5.5 0.0 1.0 0.0 9.4 8.0 35.3 262.7 DAYS WITH PRECIPITATION >=10 1 0 1 0 3 0 0 0 0 0 0 1 6 DAYS WITH PRECIPITATION >= 5 2 0 3 5 5 0 0 0 0 0 0 4 19 DAYS WITH PRECIPITATION >= 1 4 4 6 12 13 3 0 1 0 4 3 6 56 DAYS WITH PRECIPITATION 12 6 9 12 17 4 0 1 0 5 3 7 76 GREATEST DAILY PRECIPITATION 11.0 2.0 14.0 7.0 37.0 3.0 0.0 1.0 0.0 4.0 4.0 16.0 37.0 DAY 15 5 19 10 8 29 ** 5 ** 8 23 7 DAY WITH THUNDER STORM 0 1 0 1 1 0 0 0 1 0 0 0 4 DAYS WITH SNOW OR SLEET 11 1 0 1 0 0 0 0 0 0 0 3 16 DAYS WITH DUST 0 0 1 0 0 0 0 0 0 2 0 0 3 WIND DIRECTION (PREVAILING) 180 225 135 180 45 45 135 135 90 90 90 315 135 PREVAILING WIND SPEED(KNOTS) 3.3 7.7 6.1 7.0 5.1 5.1 7.2 8.7 13.0 11.2 9.0 8.8 8.0 PREVAILING WIND PERCENT 1.9 8.6 6.5 4.0 7.1 4.7 3.2 6.5 2.7 10.3 1.3 5.2 2.7 CALMS PERCENT OF WIND 96.8 78.6 85.2 89.3 68.4 86.7 92.9 84.5 89.3 71.6 97.3 91.6 86.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 191 217 183 175 120 314 126 111 73 73 77 306 130 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.5 0.8 0.5 0.6 0.1 0.3 1.0 0.2 1.0 0.1 0.6 0.2 WIND STEADINESES (MEAN %) 100.0 33.3 72.7 62.5 30.0 12.5 60.0 76.9 20.0 30.3 50.0 85.7 18.2 WIND SPEED (MEAN KNOTS) 0.1 1.5 1.1 0.8 2.0 0.8 0.5 1.3 1.0 3.3 0.2 0.7 1.1 FASTEST WIND DIRECTION 180 30 230 150 120 270 130 120 280 300 80 320 300 FASTEST WIND SPEED (KNOTS) 4 14 15 12 16 12 16 15 20 32 10 20 32 DAY 4 10 13 15 23 21 28 21 11 23 1 12 DAYS WITH SKY CLEAR (0-2)/8 11 13 11 6 16 24 28 28 30 20 14 12 213 DAYS WITH P.CLOUDY (3-6)/8 5 12 18 17 13 6 3 3 0 10 14 12 113 DAYS WITH CLOUDY (7-8)/8 15 3 2 7 2 0 0 0 0 1 2 7 39 DAYS WITH VISIBILITY =< 2 KM 6 1 0 2 0 1 0 0 0 1 0 0 11 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** 315.9 271.8 191.9 135.5 105.2 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 894.2 883.7 885.1 882.3 884.3 881.4 880.0 881.0 886.1 888.5 888.5 885.9 885.1 MAX. QFE PRESSURE IN HPA 902.0 895.1 894.0 892.0 891.5 889.0 886.4 886.2 894.0 897.6 898.4 896.0 902.0 DAY-HOUR 3- 9 1- 6 3- 6 28- 6 2- 6 17- 6 26- 6 24- 6 23- 6 31- 6 20- 6 11- 6 MIN. QFE PRESSURE IN HPA 879.6 867.7 874.6 869.8 875.5 874.3 873.2 875.1 879.1 877.0 877.5 871.4 867.7 DAY-HOUR 14- 3 10- 3 12-15 13- 6 11-15 21-12 4-15 10-15 6-15 8- 6 18-12 7-15 MEAN QNH PRESSURE IN HPA 1020.3 1008.6 1010.2 1007.1 1009.3 1006.1 1004.6 1005.6 1011.3 1014.0 1013.9 1011.1 1010.2 MAX. QNH PRESSURE IN HPA 1029.0 1021.3 1020.1 1017.9 1017.3 1014.6 1011.7 1011.4 1020.1 1024.1 1025.0 1022.3 1029.0 DAY-HOUR 3- 9 1- 6 3- 6 28- 6 2- 6 17- 6 26- 6 24- 6 23- 6 31- 6 20- 6 11- 6 MIN. QNH PRESSURE IN HPA 1004.1 990.8 998.5 993.2 999.5 998.2 997.0 999.1 1003.5 1001.2 1001.8 995.0 990.8 DAY-HOUR 14- 3 10- 3 12-15 13- 6 11-15 21-12 4-15 10-15 6-15 8- 6 18-12 7-15 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 894.1 883.5 885.6 882.5 885.0 882.4 880.9 882.2 886.9 889.1 889.0 885.8 885.6 MAX. QFE PRESSURE IN HPA 900.2 893.7 893.4 891.0 891.0 888.0 885.6 885.6 892.9 896.5 896.8 894.7 900.2 DAY 3 1 3 28 2 17 27 24 23 31 20 11 MIN. QFE PRESSURE IN HPA 879.6 867.7 876.0 869.8 879.0 877.0 876.6 878.2 881.5 877.2 877.7 875.4 867.7 DAY 14 10 12 14 11 21 4 5 7 8 18 7 MEAN QNH PRESSURE IN HPA 1020.2 1008.4 1010.8 1007.3 1010.1 1007.3 1005.6 1007.0 1012.2 1014.7 1014.5 1011.0 1010.7 MAX. QNH PRESSURE IN HPA 1027.0 1019.8 1019.5 1016.8 1016.8 1013.4 1010.8 1010.8 1018.9 1022.9 1023.2 1020.9 1027.0 DAY 3 1 3 28 2 17 27 24 23 31 20 11 MIN. QNH PRESSURE IN HPA 1004.1 990.8 1000.1 993.2 1003.4 1001.2 1000.7 1002.5 1006.2 1001.4 1002.0 999.4 990.8 DAY 14 10 12 14 11 21 4 5 7 8 18 7 MEAN QFF PRESSURE IN HPA 1027.2 1012.7 1010.5 1005.7 1005.7 1001.3 998.3 1000.3 1006.7 1013.4 1015.5 1015.3 1009.4 MAX. QFF PRESSURE IN HPA 1037.8 1028.6 1019.8 1016.0 1013.4 1007.9 1003.8 1004.9 1014.7 1024.3 1026.1 1025.2 1037.8 DAY 24 1 3 20 2 17 27 24 23 31 20 30 MIN. QFF PRESSURE IN HPA 1007.2 993.1 998.3 989.7 999.0 994.1 992.8 996.1 1000.1 997.2 1002.4 1001.2 989.7 DAY 14 10 12 13 11 21 5 10 7 8 18 7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 895.0 884.4 886.2 883.3 885.7 882.7 881.6 882.7 887.6 889.9 889.7 886.7 886.3 MAX. QFE PRESSURE IN HPA 901.9 895.1 894.0 892.0 891.5 889.0 886.4 886.2 894.0 897.6 898.4 896.0 901.9 DAY 3 1 3 28 2 17 26 24 23 31 20 11 MIN. QFE PRESSURE IN HPA 880.5 871.1 876.7 869.8 879.0 876.0 876.0 879.0 882.7 877.0 878.1 875.0 869.8 DAY 14 10 12 13 11 21 4 10 7 8 18 7 MEAN QNH PRESSURE IN HPA 1021.2 1009.5 1011.5 1008.2 1010.8 1007.6 1006.3 1007.5 1012.9 1015.5 1015.3 1012.0 1011.5 MAX. QNH PRESSURE IN HPA 1028.9 1021.3 1020.1 1017.9 1017.3 1014.6 1011.7 1011.4 1020.1 1024.1 1025.0 1022.3 1028.9 DAY 3 1 3 28 2 17 26 24 23 31 20 11 MIN. QNH PRESSURE IN HPA 1005.1 994.6 1000.9 993.2 1003.4 1000.1 1000.1 1003.4 1007.5 1001.2 1002.4 999.0 993.2 DAY 14 10 12 13 11 21 4 10 7 8 18 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 894.7 884.3 885.6 882.9 884.7 881.8 880.7 881.6 886.8 889.1 889.2 886.7 885.7 MAX. QFE PRESSURE IN HPA 902.0 895.1 892.6 891.6 890.0 888.0 885.3 886.0 893.0 897.4 897.7 895.3 902.0 DAY 3 1 3 28 3 17 26 7 23 31 20 31 MIN. QFE PRESSURE IN HPA 880.0 869.6 876.0 869.8 878.0 875.0 875.2 877.1 881.6 878.2 878.1 873.4 869.6 DAY 14 27 12 13 11 21 4 5 7 8 18 7 MEAN QNH PRESSURE IN HPA 1020.9 1009.3 1010.7 1007.8 1009.8 1006.5 1005.3 1006.3 1012.1 1014.7 1014.8 1011.9 1010.9 MAX. QNH PRESSURE IN HPA 1029.0 1021.3 1018.6 1017.5 1015.7 1013.4 1010.4 1011.2 1019.0 1023.9 1024.2 1021.6 1029.0 DAY 3 1 3 28 3 17 26 7 23 31 20 31 MIN. QNH PRESSURE IN HPA 1004.5 993.0 1000.1 993.2 1002.3 999.0 999.2 1001.3 1006.3 1002.5 1002.4 997.2 993.0 DAY 14 27 12 13 11 21 4 5 7 8 18 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 893.6 883.1 884.0 881.8 883.2 880.2 878.9 879.7 885.0 887.3 887.4 885.3 884.1 MAX. QFE PRESSURE IN HPA 900.0 893.5 890.2 889.0 888.3 886.0 883.7 884.0 891.0 895.8 896.4 894.0 900.0 DAY 3 1 2 28 3 17 26 7 23 31 20 31 MIN. QFE PRESSURE IN HPA 880.4 869.0 875.0 870.0 876.0 874.3 874.0 875.9 879.7 878.0 877.5 872.0 869.0 DAY 14 27 12 13 11 21 4 30 6 7 18 7 MEAN QNH PRESSURE IN HPA 1019.7 1008.0 1009.0 1006.5 1008.1 1004.8 1003.3 1004.1 1010.1 1012.6 1012.8 1010.5 1009.1 MAX. QNH PRESSURE IN HPA 1026.8 1019.6 1015.9 1014.6 1013.8 1011.2 1008.7 1009.0 1016.8 1022.1 1022.8 1020.1 1026.8 DAY 3 1 2 28 3 17 26 7 23 31 20 31 MIN. QNH PRESSURE IN HPA 1005.0 992.3 999.0 993.4 1000.1 998.2 997.9 1000.0 1004.2 1002.3 1001.8 995.6 992.3 DAY 14 27 12 13 11 21 4 30 6 7 18 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 893.6 883.2 883.9 881.3 882.9 879.8 878.1 878.9 884.2 887.1 887.0 885.1 883.8 MAX. QFE PRESSURE IN HPA 900.0 893.1 890.2 889.0 888.8 884.7 883.1 883.7 890.5 895.3 896.2 894.5 900.0 DAY 3 1 2 28 2 17 26 7 23 31 20 31 MIN. QFE PRESSURE IN HPA 881.6 869.0 874.6 870.0 875.5 875.0 873.2 875.1 879.1 878.0 878.5 871.4 869.0 DAY 14 27 12 13 11 1 4 10 6 7 18 7 MEAN QNH PRESSURE IN HPA 1019.7 1008.0 1008.9 1005.9 1007.8 1004.3 1002.4 1003.3 1009.3 1012.5 1012.4 1010.2 1008.7 MAX. QNH PRESSURE IN HPA 1026.8 1019.1 1015.9 1014.6 1014.3 1009.8 1008.0 1008.7 1016.2 1021.6 1022.6 1020.7 1026.8 DAY 3 1 2 28 2 17 26 7 23 31 20 31 MIN. QNH PRESSURE IN HPA 1006.3 992.3 998.5 993.4 999.5 999.0 997.0 999.1 1003.5 1002.3 1002.9 995.0 992.3 DAY 14 27 12 13 11 1 4 10 6 7 18 7 MEAN QFF PRESSURE IN HPA 1026.8 1012.2 1008.5 1004.2 1003.4 998.1 995.0 996.6 1003.8 1011.1 1013.3 1014.5 1007.3 MAX. QFF PRESSURE IN HPA 1038.5 1028.1 1016.3 1011.7 1010.1 1004.1 1002.1 1001.9 1011.8 1022.5 1025.1 1026.8 1038.5 DAY 24 1 6 19 2 17 28 7 23 31 20 31 MIN. QFF PRESSURE IN HPA 1009.8 991.2 996.7 991.4 995.1 992.1 989.0 992.1 996.9 998.7 1002.7 997.7 989.0 DAY 14 27 12 13 11 1 4 5 6 7 18 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1972 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -7.4 -9.6 1.4 14.3 13.3 19.3 24.3 23.5 20.9 16.9 6.3 -2.3 10.1 MINIMUN AIR TEMPERATURE (C) -12.0 -15.7 -2.8 6.8 7.6 11.4 15.5 12.4 9.6 7.3 0.3 -7.6 2.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 31 26 12 0 0 0 0 0 0 0 0 21 90 DAYS WITH FREEZING MIN.<= 0 31 29 25 3 0 0 0 0 0 0 20 31 139 TEMPERATURE RECORDS LOWEST(C) -24.0 -27.0 -14.0 -2.0 3.0 9.0 13.0 10.0 8.0 3.0 -3.0 -19.0 -27.0 DAY 24 11 27 5 8 12 1 2 11 23 9 25 MAXIMUM AIR TEMPERATURE (C) -3.4 -4.9 5.0 19.8 18.7 26.2 32.3 30.5 28.4 23.7 11.2 1.6 15.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 1 28 24 6 1 0 0 60 DAYS WITH MAXIMUM TEMP. <= 0 26 26 5 0 0 0 0 0 0 0 1 11 69 TEMPERATURE RECORDS HIGHEST(C) 1.0 3.0 13.0 25.0 27.0 30.0 36.0 34.0 32.0 31.0 18.0 9.0 36.0 DAY 2 16 31 29 31 30 11 9 3 1 1 16 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 10.8 7.8 13.0 11.1 14.8 16.8 18.1 18.8 16.4 10.9 9.2 13.0 MEAN DAILY TEMP. (MDT) (C) -7.7 -10.3 1.1 13.3 13.2 18.8 23.9 21.4 19.0 15.5 5.7 -3.0 9.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.5 89.0 27.0 1.0 0.0 0.0 0.0 117.5 HEATING DEG. DAYS(BASE 18 0C) 795.5 820.0 523.5 141.0 150.0 6.0 0.0 0.0 3.5 79.5 368.0 651.5 3538.5 DEWPOINT (MEAN C) -12.5 -13.4 -4.3 4.3 7.2 10.1 13.4 11.9 10.1 7.7 1.7 -6.0 2.5 MIXING RATIO (G/KG) 1.73 1.70 3.22 6.07 7.31 8.93 11.21 10.02 8.92 7.57 4.98 2.90 6.21 VAPOUR PRESSURE (HPA) 2.47 2.43 4.56 8.53 10.26 12.49 15.57 14.00 12.51 10.68 7.05 4.13 8.72 SATURATION DEF. (HPA) 1.28 0.85 2.52 8.61 5.62 10.97 16.54 16.99 13.95 9.83 3.01 1.40 7.63 RELATIVE HUMIDITY (MEAN %) 70 75 68 55 70 60 55 53 56 60 75 78 65 RELATIVE HUMIDITY (MAX. %) 84 85 83 82 93 91 89 94 95 95 96 91 90 RELATIVE HUMIDITY (MIN. %) 54 65 55 34 46 36 33 32 32 37 55 64 45 RELATIVE HUMIDITY (MEAN% 03UTC) 83 80 78 80 92 91 88 94 95 95 94 90 88 RELATIVE HUMIDITY (MEAN% 09UTC) 66 72 63 42 56 43 38 38 39 42 66 71 53 RELATIVE HUMIDITY (MEAN% 15UTC) 64 72 62 43 55 43 39 39 39 53 66 74 54 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 22.3 23.0 39.0 23.9 146.4 49.6 7.1 8.4 4.2 23.2 54.1 23.0 424.2 DAYS WITH PRECIPITATION >=10 1 0 0 0 6 1 0 0 0 1 2 1 12 DAYS WITH PRECIPITATION >= 5 1 1 2 2 12 4 0 0 0 1 5 1 29 DAYS WITH PRECIPITATION >= 1 4 8 13 8 19 12 3 3 1 6 7 7 91 DAYS WITH PRECIPITATION 7 9 13 13 20 14 6 4 4 8 9 7 114 GREATEST DAILY PRECIPITATION 15.0 8.0 7.0 6.0 24.0 16.0 3.0 4.0 3.0 13.0 17.2 11.0 24.0 DAY 22 7 26 21 15 11 31 14 10 29 4 21 DAY WITH THUNDER STORM 0 0 0 2 2 0 1 0 1 0 0 0 6 DAYS WITH SNOW OR SLEET 5 7 7 1 0 0 0 0 0 0 2 5 27 DAYS WITH DUST 0 0 0 0 0 2 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 315 315 315 360 90 90 90 90 90 90 90 90 90 PREVAILING WIND SPEED(KNOTS) 8.0 12.3 9.3 9.5 6.0 8.7 8.0 8.3 5.8 7.2 5.8 7.3 7.2 PREVAILING WIND PERCENT 2.6 2.1 6.5 8.3 6.5 5.7 10.2 3.7 7.8 15.5 13.3 2.6 5.9 CALMS PERCENT OF WIND 96.8 97.9 84.5 75.7 81.1 74.3 76.9 87.7 73.1 59.4 68.0 92.3 80.3 NO. OF WIND OBSERVATION 155 145 155 169 217 210 216 163 167 155 150 155 2057 VECTOR WIND DIRECTION (MEAN) 299 305 328 326 86 100 110 57 69 67 47 283 34 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.3 0.7 1.5 0.1 0.3 1.1 0.3 0.9 0.9 0.9 0.1 0.3 WIND STEADINESES (MEAN %) 100.0 100.0 50.0 53.6 7.1 13.6 68.7 23.1 50.0 29.0 47.4 16.7 18.8 WIND SPEED (MEAN KNOTS) 0.3 0.3 1.4 2.8 1.4 2.2 1.6 1.3 1.8 3.1 1.9 0.6 1.6 FASTEST WIND DIRECTION 280 300 320 250 240 270 90 270 360 340 360 90 270 FASTEST WIND SPEED (KNOTS) 16 15 14 25 18 40 14 18 18 22 18 15 40 DAY 13 16 7 25 18 18 2 3 24 1 27 16 DAYS WITH SKY CLEAR (0-2)/8 12 8 9 8 5 14 26 26 26 13 12 12 171 DAYS WITH P.CLOUDY (3-6)/8 12 11 9 19 16 15 5 5 4 16 8 7 127 DAYS WITH CLOUDY (7-8)/8 7 10 13 3 10 1 0 0 0 2 10 12 68 DAYS WITH VISIBILITY =< 2 KM 3 4 3 1 0 1 0 0 0 0 0 0 12 DURATION OF SUNSHINE HOURS 88.7 113.5 121.1 206.5 158.8 262.0 238.2 303.3 266.3 215.7 136.7 100.3 2211.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 889.1 891.3 885.8 883.6 883.3 882.6 880.2 883.8 885.1 888.9 889.1 892.6 886.3 MAX. QFE PRESSURE IN HPA 898.3 901.9 897.4 892.0 891.8 890.1 885.2 890.3 894.3 895.2 896.6 901.0 901.9 DAY-HOUR 4- 9 23- 9 15- 9 1- 6 23- 6 17- 6 25- 6 24- 6 17- 6 25- 6 9- 6 25- 3 MIN. QFE PRESSURE IN HPA 875.0 880.2 876.0 874.9 871.1 873.2 874.0 877.4 878.0 883.2 877.0 881.0 871.1 DAY-HOUR 14-12 17- 3 26- 6 3-12 6- 3 21-12 31-12 15-15 13-12 17-15 4- 3 16-12 MEAN QNH PRESSURE IN HPA 1014.6 1017.1 1011.0 1008.5 1008.2 1007.4 1004.8 1008.7 1010.3 1014.4 1014.7 1018.6 1011.5 MAX. QNH PRESSURE IN HPA 1024.9 1028.9 1023.9 1017.9 1017.7 1015.8 1010.3 1016.0 1020.5 1021.5 1023.0 1027.9 1028.9 DAY-HOUR 4- 9 23- 9 15- 9 1- 6 23- 6 17- 6 25- 6 24- 6 17- 6 25- 6 9- 6 25- 3 MIN. QNH PRESSURE IN HPA 999.0 1004.8 1000.1 998.9 994.6 997.0 997.9 1001.6 1002.3 1008.1 1001.2 1005.7 994.6 DAY-HOUR 14-12 17- 3 26- 6 3-12 6- 3 21-12 31-12 15-15 13-12 17-15 4- 3 16-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.3 1001.9 996.8 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.8 1010.8 1002.6 ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** 23- 6 17- 6 25- 6 **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 992.8 990.7 991.2 ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** 6- 3 30-12 30-15 **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 883.1 883.0 880.6 ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 889.6 888.6 884.0 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 23 17 15 ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 874.0 875.0 875.4 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 6 30 1 ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1008.0 1007.8 1005.2 ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1015.2 1014.1 1009.0 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 23 17 15 ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 997.9 999.0 999.4 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 6 30 1 ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.1 1002.3 997.0 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.2 1010.1 1000.8 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 18 17 16 ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 995.7 991.8 991.8 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 6 30 1 ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 888.9 891.0 885.8 884.3 883.4 883.3 881.3 884.4 886.2 889.3 889.3 892.6 886.7 MAX. QFE PRESSURE IN HPA 896.9 900.6 895.8 891.6 890.8 889.1 884.2 889.3 893.8 894.0 895.8 901.0 901.0 DAY 5 23 15 1 23 17 16 24 17 26 9 25 MIN. QFE PRESSURE IN HPA 876.7 880.2 876.2 879.4 871.1 875.1 877.4 879.1 881.0 884.8 877.0 882.0 871.1 DAY 15 17 26 22 6 30 31 1 13 29 4 16 MEAN QNH PRESSURE IN HPA 1014.4 1016.8 1011.0 1009.3 1008.4 1008.2 1006.0 1009.5 1011.4 1014.9 1014.9 1018.6 1011.9 MAX. QNH PRESSURE IN HPA 1023.3 1027.5 1022.1 1017.5 1016.6 1014.7 1009.2 1014.9 1019.9 1020.1 1022.1 1027.9 1027.9 DAY 5 23 15 1 23 17 16 24 17 26 9 25 MIN. QNH PRESSURE IN HPA 1000.9 1004.8 1000.3 1003.9 994.6 999.1 1001.6 1003.5 1005.7 1009.9 1001.2 1006.8 994.6 DAY 15 17 26 22 6 30 31 1 13 29 4 16 MEAN QFF PRESSURE IN HPA 1022.7 1026.7 1014.7 1007.0 1005.8 1003.1 998.4 1003.2 1006.5 1011.9 1016.3 1024.5 1011.7 MAX. QFF PRESSURE IN HPA 1032.2 1038.5 1027.6 1017.5 1013.1 1010.2 1002.1 1008.6 1014.7 1017.6 1025.3 1039.2 1039.2 DAY 30 23 15 1 19 17 16 4 17 26 9 25 MIN. QFF PRESSURE IN HPA 1005.9 1009.7 1000.5 1000.5 992.8 992.5 994.4 998.6 1001.0 1007.4 998.6 1011.1 992.5 DAY 15 17 26 22 6 30 31 17 1 18 4 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 889.7 891.8 886.3 885.2 884.3 883.7 881.7 885.0 886.9 890.2 890.0 893.2 887.3 MAX. QFE PRESSURE IN HPA 897.0 901.7 897.0 892.0 891.8 890.1 885.2 890.3 894.3 895.2 896.6 901.0 901.7 DAY 5 23 15 1 23 17 25 24 17 25 9 25 MIN. QFE PRESSURE IN HPA 877.4 881.2 876.0 878.9 872.0 876.0 876.7 880.0 881.8 885.0 879.7 882.0 872.0 DAY 14 17 26 3 6 21 31 1 13 29 3 16 MEAN QNH PRESSURE IN HPA 1015.3 1017.7 1011.5 1010.3 1009.3 1008.7 1006.5 1010.1 1012.2 1015.8 1015.7 1019.3 1012.7 MAX. QNH PRESSURE IN HPA 1023.5 1028.7 1023.5 1017.9 1017.7 1015.8 1010.3 1016.0 1020.5 1021.5 1023.0 1027.9 1028.7 DAY 5 23 15 1 23 17 25 24 17 25 9 25 MIN. QNH PRESSURE IN HPA 1001.6 1005.9 1000.1 1003.3 995.6 1000.1 1000.9 1004.5 1006.5 1010.1 1004.2 1006.8 995.6 DAY 14 17 26 3 6 21 31 1 13 29 3 16 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1006.5 1003.1 998.7 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.8 1010.8 1002.6 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 23 17 25 ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 993.2 992.9 994.0 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 6 30 31 ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 890.1 892.2 886.6 884.5 883.8 883.0 880.8 884.4 886.0 889.5 889.7 893.4 887.0 MAX. QFE PRESSURE IN HPA 898.3 901.9 897.4 891.1 891.2 890.1 884.4 889.7 894.0 894.8 896.3 900.6 901.9 DAY 4 23 15 1 23 17 25 24 17 25 9 25 MIN. QFE PRESSURE IN HPA 876.9 881.7 877.6 877.2 871.2 874.8 875.4 880.2 880.7 884.4 879.3 881.6 871.2 DAY 14 17 26 3 6 21 31 1 13 29 3 16 MEAN QNH PRESSURE IN HPA 1015.8 1018.1 1011.8 1009.6 1008.8 1007.9 1005.5 1009.4 1011.3 1015.1 1015.3 1019.5 1012.3 MAX. QNH PRESSURE IN HPA 1024.9 1028.9 1023.9 1016.9 1017.0 1015.8 1009.4 1015.3 1020.1 1021.0 1022.7 1027.5 1028.9 DAY 4 23 15 1 23 17 25 24 17 25 9 25 MIN. QNH PRESSURE IN HPA 1001.1 1006.4 1001.9 1001.4 994.7 998.7 999.4 1004.8 1005.3 1009.4 1003.8 1006.3 994.7 DAY 14 17 26 3 6 21 31 1 13 29 3 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 888.5 890.7 885.5 883.0 882.7 881.8 879.3 882.6 884.0 887.9 888.3 892.0 885.5 MAX. QFE PRESSURE IN HPA 897.2 900.0 896.0 888.7 889.3 888.2 883.0 888.3 892.5 893.8 894.4 900.0 900.0 DAY 4 22 15 1 23 17 25 24 17 25 9 25 MIN. QFE PRESSURE IN HPA 875.0 881.5 877.0 874.9 872.0 873.2 874.0 878.2 878.0 883.7 877.3 881.0 872.0 DAY 14 17 18 3 6 21 31 16 13 18 3 16 MEAN QNH PRESSURE IN HPA 1014.0 1016.4 1010.6 1007.9 1007.5 1006.5 1003.7 1007.5 1009.0 1013.3 1013.8 1017.9 1010.7 MAX. QNH PRESSURE IN HPA 1023.7 1026.8 1022.3 1014.2 1014.9 1013.7 1007.9 1013.8 1018.4 1019.9 1020.6 1026.8 1026.8 DAY 4 22 15 1 23 17 25 24 17 25 9 25 MIN. QNH PRESSURE IN HPA 999.0 1006.2 1001.2 998.9 995.6 997.0 997.9 1002.5 1002.3 1008.7 1001.5 1005.7 995.6 DAY 14 17 18 3 6 21 31 16 13 18 3 16 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.6 1000.9 995.7 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.0 1009.0 999.2 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 18 16 25 ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 993.0 990.7 991.3 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 6 30 31 ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 888.2 890.6 885.2 882.6 882.5 881.3 878.4 881.9 883.4 887.7 888.2 891.8 885.1 MAX. QFE PRESSURE IN HPA 897.7 899.4 895.4 887.9 889.1 887.4 882.0 887.8 891.8 894.8 894.0 899.4 899.4 DAY 4 23 15 14 23 16 25 24 17 25 9 25 MIN. QFE PRESSURE IN HPA 875.0 881.8 876.2 874.9 873.8 873.2 875.0 877.4 878.8 883.2 877.3 881.8 873.2 DAY 14 5 18 3 6 21 30 15 13 17 3 19 MEAN QNH PRESSURE IN HPA 1013.7 1016.3 1010.3 1007.4 1007.3 1006.0 1002.8 1006.6 1008.4 1013.1 1013.6 1017.7 1010.3 MAX. QNH PRESSURE IN HPA 1024.2 1026.1 1021.7 1013.3 1014.7 1012.8 1006.8 1013.2 1017.7 1021.0 1020.1 1026.1 1026.1 DAY 4 23 15 14 23 16 25 24 17 25 9 25 MIN. QNH PRESSURE IN HPA 999.0 1006.5 1000.3 998.9 997.6 997.0 999.0 1001.6 1003.2 1008.1 1001.5 1006.5 997.0 DAY 14 5 18 3 6 21 30 15 13 17 3 19 MEAN QFF PRESSURE IN HPA 1022.0 1026.1 1013.9 1005.0 1004.7 1000.8 995.2 1000.2 1003.3 1010.1 1015.1 1023.5 1010.0 MAX. QFF PRESSURE IN HPA 1032.7 1038.0 1025.4 1012.7 1012.1 1007.9 998.8 1006.5 1012.3 1018.4 1023.0 1036.8 1038.0 DAY 4 11 15 1 18 16 25 24 17 25 9 25 MIN. QFF PRESSURE IN HPA 1004.1 1012.0 1002.1 997.1 995.9 991.1 991.2 994.3 997.8 1003.6 999.0 1009.9 991.1 DAY 14 17 25 3 5 21 30 16 4 17 3 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 883.1 882.2 879.4 ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 889.9 888.2 883.0 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 23 16 14 ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 873.1 874.0 876.4 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 5 29 7 ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1008.0 1007.0 1003.9 ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1015.6 1013.7 1007.9 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 23 16 14 ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 996.9 997.9 1000.5 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 5 29 7 ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.1 1001.4 996.0 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.5 1009.4 1000.0 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 20 16 14 ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 994.1 991.1 992.1 ****** ****** ****** ****** ****** ****** DAY ** ** ** ** 5 29 7 ** ** ** ** ** 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1973 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -7.2 -0.0 5.3 10.9 15.7 21.2 24.4 25.2 19.7 14.7 4.7 -0.0 11.2 MINIMUN AIR TEMPERATURE (C) -13.2 -5.3 -1.7 3.5 6.4 10.7 13.5 13.6 7.7 5.2 -1.4 -5.6 2.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 30 17 11 0 0 0 0 0 0 0 12 22 92 DAYS WITH FREEZING MIN.<= 0 31 27 24 5 0 0 0 0 0 4 20 29 140 TEMPERATURE RECORDS LOWEST(C) -27.0 -15.0 -7.0 -1.0 1.0 7.0 10.0 9.0 4.0 -2.0 -8.0 -15.0 -27.0 DAY 19 6 24 6 1 1 2 31 27 28 20 13 MAXIMUM AIR TEMPERATURE (C) -2.2 4.6 10.5 15.3 20.6 27.1 31.0 31.9 26.7 22.0 10.3 4.7 16.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 7 20 25 3 0 0 0 56 DAYS WITH MAXIMUM TEMP. <= 0 22 5 0 0 0 0 0 0 0 0 0 9 36 TEMPERATURE RECORDS HIGHEST(C) 3.0 15.0 18.0 21.0 30.0 35.0 37.0 37.0 31.0 26.0 20.0 14.0 37.0 DAY 10 19 13 14 28 27 28 3 13 1 1 3 DIF. BETWEEN (MAX.-MIN.) (C) 11.0 9.9 12.2 11.8 14.2 16.4 17.5 18.3 19.0 16.8 11.7 10.3 14.1 MEAN DAILY TEMP. (MDT) (C) -7.7 -0.3 4.4 9.4 13.5 18.9 22.3 22.8 17.2 13.6 4.5 -0.5 9.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 10.5 48.0 62.0 0.0 0.0 0.0 0.0 120.5 HEATING DEG. DAYS(BASE 18 0C) 796.5 513.5 420.5 258.5 142.0 25.0 0.0 0.0 37.5 136.5 405.5 572.5 3308.0 DEWPOINT (MEAN C) -9.8 -4.0 -2.1 3.4 6.6 9.9 12.9 13.4 8.0 5.5 -0.9 -4.5 3.2 MIXING RATIO (G/KG) 2.17 3.32 3.81 5.66 7.03 8.84 10.80 11.15 7.71 6.60 4.16 3.19 6.20 VAPOUR PRESSURE (HPA) 3.08 4.71 5.38 7.95 9.87 12.35 14.99 15.49 10.83 9.33 5.90 4.53 8.70 SATURATION DEF. (HPA) 0.75 1.78 3.99 5.58 9.08 14.52 17.44 18.51 13.83 8.72 3.38 2.04 8.30 RELATIVE HUMIDITY (MEAN %) 83 77 62 64 59 53 53 52 52 59 70 74 63 RELATIVE HUMIDITY (MAX. %) 92 90 87 93 94 93 94 93 94 94 90 91 92 RELATIVE HUMIDITY (MIN. %) 72 63 44 46 42 34 34 34 31 34 50 56 45 RELATIVE HUMIDITY (MEAN% 03UTC) 91 89 87 92 94 93 94 93 94 94 87 91 92 RELATIVE HUMIDITY (MEAN% 09UTC) 76 72 52 55 48 41 41 40 37 40 59 66 52 RELATIVE HUMIDITY (MEAN% 15UTC) 81 74 57 55 50 42 42 42 42 60 72 73 58 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 31.6 14.2 40.5 77.4 50.4 12.2 15.0 0.0 0.0 20.9 6.4 10.6 279.2 DAYS WITH PRECIPITATION >=10 1 0 2 2 1 0 0 0 0 1 0 0 7 DAYS WITH PRECIPITATION >= 5 2 1 2 7 3 1 1 0 0 1 0 1 19 DAYS WITH PRECIPITATION >= 1 8 5 7 14 15 4 5 0 0 3 2 3 66 DAYS WITH PRECIPITATION 12 6 10 15 20 6 8 0 0 6 6 4 93 GREATEST DAILY PRECIPITATION 11.0 9.0 20.0 16.0 15.0 5.0 5.0 0.0 0.0 13.4 4.0 5.0 20.0 DAY 16 22 23 15 3 5 18 ** ** 5 24 12 DAY WITH THUNDER STORM 0 0 0 0 3 1 0 0 0 0 0 0 4 DAYS WITH SNOW OR SLEET 10 4 2 0 0 0 0 0 0 0 2 0 18 DAYS WITH DUST 0 0 0 0 3 1 0 1 1 1 2 0 9 WIND DIRECTION (PREVAILING) 315 315 90 90 90 90 90 90 90 90 315 90 90 PREVAILING WIND SPEED(KNOTS) 10.3 8.2 8.5 9.6 6.9 8.8 10.3 9.0 9.1 7.3 16.4 11.4 9.0 PREVAILING WIND PERCENT 10.3 18.6 7.7 14.7 11.6 16.7 16.1 16.1 21.3 10.3 12.0 6.5 11.0 CALMS PERCENT OF WIND 79.4 63.6 71.0 62.7 60.6 57.3 68.4 74.8 59.3 72.9 70.0 87.7 69.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 299 307 350 68 23 108 79 102 94 54 345 59 58 VECTOR WIND MAGNITUDE(KNOTS) 1.3 1.7 0.3 0.8 0.6 1.6 1.9 2.0 2.5 0.8 1.7 0.3 0.7 WIND STEADINESES (MEAN %) 65.0 56.7 10.0 23.5 20.7 41.0 55.9 95.2 80.6 40.0 47.2 21.4 25.0 WIND SPEED (MEAN KNOTS) 2.0 3.0 3.0 3.4 2.9 3.9 3.4 2.1 3.1 2.0 3.6 1.4 2.8 FASTEST WIND DIRECTION 330 100 270 90 300 240 360 90 90 360 330 270 330 FASTEST WIND SPEED (KNOTS) 30 18 26 28 22 24 30 18 20 18 34 18 34 DAY 12 19 13 28 30 26 29 28 25 31 2 1 DAYS WITH SKY CLEAR (0-2)/8 10 8 13 7 14 24 24 27 30 18 13 17 205 DAYS WITH P.CLOUDY (3-6)/8 10 12 12 16 12 4 7 4 0 13 13 7 110 DAYS WITH CLOUDY (7-8)/8 11 8 6 7 5 2 0 0 0 0 4 7 50 DAYS WITH VISIBILITY =< 2 KM 4 5 0 0 1 1 0 0 0 0 0 0 11 DURATION OF SUNSHINE HOURS 105.8 118.2 166.2 186.1 255.1 301.1 338.4 320.1 296.0 222.0 149.1 145.0 2603.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 890.9 887.6 885.7 882.8 884.3 881.3 878.5 880.4 885.7 888.4 888.7 890.7 885.4 MAX. QFE PRESSURE IN HPA 904.0 897.0 896.4 893.0 893.8 888.4 885.2 887.0 893.0 896.0 898.2 902.0 904.0 DAY-HOUR 3- 9 11- 9 10- 6 11- 6 7- 9 4- 6 23- 3 7- 6 26- 6 27- 3 6- 6 24- 6 MIN. QFE PRESSURE IN HPA 872.0 866.0 869.0 874.0 872.8 875.0 872.0 872.6 878.1 879.0 872.0 874.0 866.0 DAY-HOUR 13- 3 22- 3 3-12 18-12 29-15 11-15 28-15 9-15 1-15 31-12 23-12 17-12 MEAN QNH PRESSURE IN HPA 1016.6 1013.0 1010.9 1007.6 1009.3 1005.9 1002.8 1005.0 1010.9 1013.8 1014.2 1016.4 1010.5 MAX. QNH PRESSURE IN HPA 1031.2 1023.5 1022.8 1019.0 1019.9 1013.9 1010.3 1012.3 1019.0 1022.3 1024.8 1029.0 1031.2 DAY-HOUR 3- 9 11- 9 10- 6 11- 6 7- 9 4- 6 23- 3 7- 6 26- 6 27- 3 6- 6 24- 6 MIN. QNH PRESSURE IN HPA 995.6 988.9 992.3 997.9 996.5 999.0 995.6 996.3 1002.4 1003.4 995.6 997.9 988.9 DAY-HOUR 13- 3 22- 3 3-12 18-12 29-15 11-15 28-15 9-15 1-15 31-12 23-12 17-12 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 890.9 887.2 886.2 882.9 884.7 882.1 879.5 881.6 886.5 889.3 888.8 890.6 885.9 MAX. QFE PRESSURE IN HPA 902.0 895.0 895.4 892.0 892.0 888.0 885.2 886.0 892.6 896.0 897.2 901.4 902.0 DAY 26 3 10 11 8 4 23 7 29 27 11 24 MIN. QFE PRESSURE IN HPA 872.0 866.0 876.8 876.0 875.0 877.0 875.0 876.0 880.2 884.8 874.8 876.0 866.0 DAY 13 22 3 8 30 17 29 9 1 29 23 18 MEAN QNH PRESSURE IN HPA 1016.7 1012.6 1011.4 1007.8 1009.8 1006.9 1004.0 1006.3 1011.8 1014.9 1014.4 1016.4 1011.1 MAX. QNH PRESSURE IN HPA 1029.0 1021.2 1021.7 1017.9 1017.9 1013.4 1010.3 1011.2 1018.6 1022.3 1023.7 1028.4 1029.0 DAY 26 3 10 11 8 4 23 7 29 27 11 24 MIN. QNH PRESSURE IN HPA 995.6 988.9 1001.0 1000.1 999.0 1001.2 999.0 1000.1 1004.8 1009.9 998.7 1000.1 988.9 DAY 13 22 3 8 30 17 29 9 1 29 23 18 MEAN QFF PRESSURE IN HPA 1025.4 1017.4 1013.8 1007.3 1007.3 1001.7 997.4 999.4 1007.7 1013.6 1017.2 1021.4 1010.8 MAX. QFF PRESSURE IN HPA 1039.2 1028.4 1025.9 1018.6 1015.8 1009.7 1003.8 1004.1 1016.4 1021.4 1028.5 1034.8 1039.2 DAY 26 11 10 11 8 6 18 29 29 27 20 24 MIN. QFF PRESSURE IN HPA 1000.4 991.3 1001.9 999.2 994.4 995.5 991.3 992.2 998.8 1009.4 998.9 1003.0 991.3 DAY 13 22 3 8 30 17 29 9 1 1 23 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 891.6 888.2 886.8 883.5 885.3 882.7 880.1 882.3 887.3 889.9 889.8 891.6 886.6 MAX. QFE PRESSURE IN HPA 903.0 896.0 896.4 893.0 893.3 888.4 885.2 887.0 893.0 896.0 898.2 902.0 903.0 DAY 3 2 10 11 7 4 23 7 26 27 6 24 MIN. QFE PRESSURE IN HPA 875.0 866.0 875.0 876.0 876.0 878.0 875.0 877.0 881.0 885.0 875.0 878.0 866.0 DAY 13 22 3 8 30 16 29 9 1 29 23 18 MEAN QNH PRESSURE IN HPA 1017.4 1013.6 1012.1 1008.4 1010.5 1007.6 1004.7 1007.1 1012.6 1015.6 1015.5 1017.5 1011.9 MAX. QNH PRESSURE IN HPA 1030.1 1022.3 1022.8 1019.0 1019.3 1013.9 1010.3 1012.3 1019.0 1022.3 1024.8 1029.0 1030.1 DAY 3 2 10 11 7 4 23 7 26 27 6 24 MIN. QNH PRESSURE IN HPA 999.0 988.9 999.0 1000.1 1000.1 1002.3 999.0 1001.2 1005.7 1010.1 999.0 1002.3 988.9 DAY 13 22 3 8 30 16 29 9 1 29 23 18 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 891.6 888.6 886.2 883.3 884.8 881.8 879.1 881.1 886.5 888.9 888.8 891.1 886.0 MAX. QFE PRESSURE IN HPA 904.0 897.0 895.2 892.8 893.8 888.0 884.2 886.0 893.0 895.3 897.5 901.8 904.0 DAY 3 11 10 11 7 6 18 7 26 22 6 26 MIN. QFE PRESSURE IN HPA 875.0 866.7 873.0 876.0 875.8 877.0 874.0 875.2 880.2 882.4 874.0 877.0 866.7 DAY 13 22 3 8 29 17 29 9 1 31 23 17 MEAN QNH PRESSURE IN HPA 1017.4 1014.1 1011.5 1008.2 1009.9 1006.6 1003.5 1005.8 1011.8 1014.5 1014.3 1016.9 1011.2 MAX. QNH PRESSURE IN HPA 1031.2 1023.5 1021.5 1018.8 1019.9 1013.4 1009.2 1011.2 1019.0 1021.6 1024.0 1028.8 1031.2 DAY 3 11 10 11 7 6 18 7 26 22 6 26 MIN. QNH PRESSURE IN HPA 999.0 989.7 996.7 1000.1 999.9 1001.2 997.9 999.2 1004.8 1007.2 997.9 1001.2 989.7 DAY 13 22 3 8 29 17 29 9 1 31 23 17 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 890.4 887.1 884.8 882.2 883.6 880.2 877.3 879.0 884.6 887.0 887.6 889.6 884.4 MAX. QFE PRESSURE IN HPA 902.0 895.0 894.0 891.0 892.0 888.0 883.0 884.0 891.0 893.8 896.2 901.0 902.0 DAY 3 2 9 10 7 6 18 7 26 22 6 26 MIN. QFE PRESSURE IN HPA 874.0 866.0 869.0 874.0 874.0 876.0 873.0 873.0 879.0 879.0 872.0 874.0 866.0 DAY 15 22 3 18 29 12 28 9 2 31 23 17 MEAN QNH PRESSURE IN HPA 1016.1 1012.4 1009.9 1006.9 1008.6 1004.8 1001.5 1003.5 1009.6 1012.3 1013.0 1015.2 1009.5 MAX. QNH PRESSURE IN HPA 1029.0 1021.2 1020.1 1016.8 1017.9 1013.4 1007.9 1009.0 1016.8 1019.9 1022.6 1027.9 1029.0 DAY 3 2 9 10 7 6 18 7 26 22 6 26 MIN. QNH PRESSURE IN HPA 997.9 988.9 992.3 997.9 997.9 1000.1 996.7 996.7 1003.4 1003.4 995.6 997.9 988.9 DAY 15 22 3 18 29 12 28 9 2 31 23 17 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 890.0 887.0 884.6 882.0 883.1 879.4 876.3 878.0 883.8 886.8 888.5 890.4 884.2 MAX. QFE PRESSURE IN HPA 902.8 895.0 894.0 890.0 891.0 887.0 881.4 882.8 890.0 894.0 896.2 900.2 902.8 DAY 3 2 9 10 7 6 18 7 26 5 6 26 MIN. QFE PRESSURE IN HPA 873.0 867.0 869.0 874.0 872.8 875.0 872.0 872.6 878.1 879.0 873.2 874.0 867.0 DAY 12 22 3 18 29 11 28 9 1 31 23 17 MEAN QNH PRESSURE IN HPA 1015.6 1012.3 1009.7 1006.8 1008.0 1003.9 1000.4 1002.3 1008.8 1012.1 1014.0 1016.1 1009.2 MAX. QNH PRESSURE IN HPA 1029.9 1021.2 1020.1 1015.7 1016.8 1012.3 1006.1 1007.7 1015.7 1020.1 1022.6 1027.0 1029.9 DAY 3 2 9 10 7 6 18 7 26 5 6 26 MIN. QNH PRESSURE IN HPA 996.7 990.1 992.3 997.9 996.5 999.0 995.6 996.3 1002.4 1003.4 997.0 997.9 990.1 DAY 12 22 3 18 29 11 28 9 1 31 23 17 MEAN QFF PRESSURE IN HPA 1024.2 1017.0 1012.0 1006.2 1005.4 998.6 993.7 995.2 1004.6 1010.7 1016.9 1021.1 1008.8 MAX. QFF PRESSURE IN HPA 1039.2 1031.1 1024.4 1016.6 1014.9 1009.2 1000.8 999.8 1012.9 1018.7 1027.9 1033.5 1039.2 DAY 3 6 9 10 7 6 18 7 26 5 7 23 MIN. QFF PRESSURE IN HPA 1003.0 993.6 993.2 998.2 991.6 992.0 987.7 987.7 996.6 1001.0 996.6 1001.7 987.7 DAY 15 22 3 18 29 21 28 9 1 26 23 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1974 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.1 -2.9 5.5 8.9 19.3 22.1 23.2 22.8 17.1 15.5 7.6 1.1 11.3 MINIMUN AIR TEMPERATURE (C) -8.2 -8.7 1.6 2.6 7.7 10.6 13.3 12.3 8.4 4.1 0.1 -3.6 3.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 25 23 4 0 0 0 0 0 0 0 4 21 77 DAYS WITH FREEZING MIN.<= 0 31 26 12 4 0 0 0 0 0 2 18 27 120 TEMPERATURE RECORDS LOWEST(C) -20.0 -21.0 -8.0 0.0 1.0 8.0 8.0 9.0 5.0 0.0 -5.0 -9.0 -21.0 DAY 25 3 7 1 1 3 8 15 20 19 27 23 MAXIMUM AIR TEMPERATURE (C) -0.8 1.7 9.2 13.8 25.0 28.7 29.3 29.5 23.4 23.0 13.0 5.4 16.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 15 14 16 0 0 0 0 46 DAYS WITH MAXIMUM TEMP. <= 0 23 8 0 0 0 0 0 0 0 0 0 0 31 TEMPERATURE RECORDS HIGHEST(C) 3.0 6.0 17.0 22.0 30.0 34.0 36.0 36.0 29.0 28.0 24.0 10.0 36.0 DAY 11 28 23 18 22 22 2 4 28 22 3 2 DIF. BETWEEN (MAX.-MIN.) (C) 7.4 10.4 7.6 11.2 17.3 18.1 16.0 17.2 15.0 18.9 12.9 9.0 13.5 MEAN DAILY TEMP. (MDT) (C) -4.5 -3.5 5.4 8.2 16.3 19.7 21.3 20.9 15.9 13.6 6.6 0.9 10.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 14.5 38.5 26.5 0.0 0.0 0.0 0.0 79.5 HEATING DEG. DAYS(BASE 18 0C) 697.5 602.5 391.0 293.5 55.5 12.0 7.5 2.5 65.0 137.5 343.0 531.0 3138.5 DEWPOINT (MEAN C) -6.3 -5.8 1.8 1.9 7.1 10.4 12.2 11.3 8.8 4.5 1.5 -3.3 3.7 MIXING RATIO (G/KG) 2.79 2.93 5.13 5.07 7.29 9.21 10.34 9.72 8.19 6.04 4.89 3.44 6.25 VAPOUR PRESSURE (HPA) 3.96 4.17 7.25 7.12 10.20 12.81 14.35 13.51 11.47 8.54 6.93 4.87 8.77 SATURATION DEF. (HPA) 0.71 1.04 2.22 4.81 13.63 15.69 15.82 16.17 9.08 10.36 4.29 1.98 7.98 RELATIVE HUMIDITY (MEAN %) 85 81 79 65 50 52 54 53 63 53 69 74 65 RELATIVE HUMIDITY (MAX. %) 92 92 94 87 85 90 89 89 95 91 92 93 91 RELATIVE HUMIDITY (MIN. %) 76 69 65 49 33 32 36 33 41 30 50 56 48 RELATIVE HUMIDITY (MEAN% 03UTC) 90 90 93 86 85 90 89 88 95 90 91 91 90 RELATIVE HUMIDITY (MEAN% 09UTC) 82 77 73 56 40 39 42 43 51 39 59 68 56 RELATIVE HUMIDITY (MEAN% 15UTC) 85 79 77 60 37 41 46 38 52 42 60 68 57 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 35.8 9.8 119.0 61.6 21.4 21.4 29.0 19.6 59.0 1.0 12.4 15.0 405.0 DAYS WITH PRECIPITATION >=10 1 0 7 2 0 0 1 1 3 0 0 0 15 DAYS WITH PRECIPITATION >= 5 3 1 10 5 2 2 1 1 3 0 1 1 30 DAYS WITH PRECIPITATION >= 1 6 2 16 10 6 8 10 4 12 1 2 4 81 DAYS WITH PRECIPITATION 14 9 17 12 9 8 10 9 12 1 6 4 111 GREATEST DAILY PRECIPITATION 13.0 5.3 18.0 17.0 7.0 8.0 10.0 13.0 15.0 1.0 7.0 9.0 18.0 DAY 22 12 21 11 4 9 6 8 3 9 24 6 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 10 6 4 0 0 0 0 0 0 0 0 1 21 DAYS WITH DUST 0 0 0 0 2 0 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 90 360 270 360 315 90 90 135 90 90 90 360 90 PREVAILING WIND SPEED(KNOTS) 6.0 9.6 13.1 15.3 12.7 14.9 14.3 14.9 14.9 15.1 13.0 15.4 12.4 PREVAILING WIND PERCENT 4.5 6.4 10.3 16.0 14.8 9.3 14.2 7.1 10.7 7.1 5.3 9.0 7.7 CALMS PERCENT OF WIND 81.3 76.4 71.0 54.0 36.1 78.0 75.5 73.5 71.3 72.9 83.3 76.1 70.7 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 342 327 312 358 331 102 115 97 107 67 94 340 29 VECTOR WIND MAGNITUDE(KNOTS) 0.4 0.6 1.5 2.3 3.6 1.5 2.4 1.4 1.7 1.4 0.4 1.9 0.7 WIND STEADINESES (MEAN %) 28.6 33.3 42.9 34.3 52.9 55.6 68.6 35.9 44.7 32.6 16.0 61.3 18.9 WIND SPEED (MEAN KNOTS) 1.4 1.8 3.5 6.7 6.8 2.7 3.5 3.9 3.8 4.3 2.5 3.1 3.7 FASTEST WIND DIRECTION 270 360 280 260 320 90 100 360 90 360 270 350 270 FASTEST WIND SPEED (KNOTS) 16 18 28 30 30 25 20 35 20 22 38 30 38 DAY 20 24 17 20 22 6 3 14 16 28 3 21 DAYS WITH SKY CLEAR (0-2)/8 6 9 6 10 21 27 23 24 22 26 15 14 203 DAYS WITH P.CLOUDY (3-6)/8 5 7 8 11 9 3 6 5 4 3 10 11 82 DAYS WITH CLOUDY (7-8)/8 20 12 17 9 1 0 2 2 4 2 5 6 80 DAYS WITH VISIBILITY =< 2 KM 6 1 3 0 0 0 0 0 0 0 0 1 11 DURATION OF SUNSHINE HOURS 61.6 108.0 100.0 147.0 285.3 307.6 295.2 302.3 232.1 234.5 153.9 131.0 2358.5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 887.2 889.0 887.5 880.3 880.8 878.5 878.5 878.8 883.9 888.4 888.8 887.0 884.1 MAX. QFE PRESSURE IN HPA 901.0 897.4 896.0 890.0 887.0 885.0 885.0 887.0 892.0 894.0 897.0 892.0 901.0 DAY-HOUR 5- 6 20- 9 7- 6 25- 6 6- 6 10- 3 15- 6 25- 6 23- 6 14- 6 17- 6 15- 6 MIN. QFE PRESSURE IN HPA 868.0 875.8 876.0 871.0 870.4 870.0 867.0 868.2 874.8 879.0 879.0 873.0 867.0 DAY-HOUR 21-12 12- 3 17- 3 9-12 27-15 24-15 4-15 7-15 1-15 28-12 3-12 5-12 MEAN QNH PRESSURE IN HPA 1012.6 1014.5 1012.9 1004.9 1005.4 1002.9 1002.8 1003.2 1008.9 1013.9 1014.3 1012.3 1009.0 MAX. QNH PRESSURE IN HPA 1027.9 1023.9 1022.3 1015.7 1012.3 1010.1 1010.1 1012.3 1017.9 1020.1 1023.5 1017.9 1027.9 DAY-HOUR 5- 6 20- 9 7- 6 25- 6 6- 6 10- 3 15- 6 25- 6 23- 6 14- 6 17- 6 15- 6 MIN. QNH PRESSURE IN HPA 991.2 999.9 1000.1 994.5 993.8 993.4 990.1 991.4 998.7 1003.4 1003.4 996.7 990.1 DAY-HOUR 21-12 12- 3 17- 3 9-12 27-15 24-15 4-15 7-15 1-15 28-12 3-12 5-12 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 887.3 888.9 887.3 880.6 881.5 879.6 879.2 879.6 884.2 888.9 889.1 887.4 884.4 MAX. QFE PRESSURE IN HPA 899.8 895.0 895.0 888.0 886.0 885.0 884.4 886.0 890.0 893.2 895.0 891.6 899.8 DAY 5 4 7 25 9 10 15 25 23 23 17 18 MIN. QFE PRESSURE IN HPA 870.0 875.8 876.0 872.4 875.1 874.4 871.0 872.0 876.6 882.0 881.0 874.0 870.0 DAY 22 12 17 20 23 27 4 8 2 27 26 6 MEAN QNH PRESSURE IN HPA 1012.7 1014.4 1012.6 1005.2 1006.2 1004.0 1003.6 1004.1 1009.2 1014.4 1014.7 1012.8 1009.5 MAX. QNH PRESSURE IN HPA 1026.6 1021.2 1021.2 1013.4 1011.2 1010.1 1009.4 1011.2 1015.7 1019.2 1021.2 1017.5 1026.6 DAY 5 4 7 25 9 10 15 25 23 23 17 18 MIN. QNH PRESSURE IN HPA 993.4 999.9 1000.1 996.1 999.1 998.3 994.5 995.6 1000.7 1006.8 1005.7 997.9 993.4 DAY 22 12 17 20 23 27 4 8 2 27 26 6 MEAN QFF PRESSURE IN HPA 1019.2 1020.7 1014.4 1005.8 1002.2 998.9 997.7 998.2 1006.0 1012.9 1016.1 1016.9 1009.1 MAX. QFF PRESSURE IN HPA 1033.9 1032.3 1026.4 1015.4 1010.2 1007.4 1005.7 1007.7 1013.6 1017.7 1023.2 1022.9 1033.9 DAY 5 3 7 1 6 10 8 25 24 14 17 18 MIN. QFF PRESSURE IN HPA 996.5 1005.5 999.3 994.6 993.5 991.8 986.4 987.9 996.6 1003.6 1006.8 999.6 986.4 DAY 22 12 17 20 23 24 4 8 2 27 26 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 887.8 889.7 888.2 881.4 882.2 880.1 880.0 880.5 885.2 890.0 890.2 888.2 885.3 MAX. QFE PRESSURE IN HPA 901.0 897.0 896.0 890.0 887.0 885.0 885.0 887.0 892.0 894.0 897.0 892.0 901.0 DAY 5 20 7 25 6 10 15 25 23 14 17 15 MIN. QFE PRESSURE IN HPA 870.0 877.0 876.0 872.0 875.2 875.0 871.0 874.0 877.0 883.0 883.0 874.0 870.0 DAY 22 12 17 9 22 24 4 8 2 28 3 6 MEAN QNH PRESSURE IN HPA 1013.3 1015.4 1013.7 1006.1 1007.0 1004.6 1004.5 1005.1 1010.4 1015.7 1015.9 1013.7 1010.4 MAX. QNH PRESSURE IN HPA 1027.9 1023.5 1022.3 1015.7 1012.3 1010.1 1010.1 1012.3 1017.9 1020.1 1023.5 1017.9 1027.9 DAY 5 20 7 25 6 10 15 25 23 14 17 15 MIN. QNH PRESSURE IN HPA 993.4 1001.2 1000.1 995.6 999.2 999.0 994.5 997.9 1001.2 1007.9 1007.9 997.9 993.4 DAY 22 12 17 9 22 24 4 8 2 28 3 6 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 888.2 889.8 888.1 880.9 881.3 879.2 879.2 879.6 884.6 889.2 889.4 887.5 884.7 MAX. QFE PRESSURE IN HPA 900.0 897.4 895.2 889.4 886.1 884.6 884.0 886.8 890.8 894.0 895.4 891.6 900.0 DAY 5 20 7 25 8 10 15 25 23 23 17 15 MIN. QFE PRESSURE IN HPA 870.8 877.4 877.0 871.4 873.3 873.0 870.4 872.8 875.8 881.6 881.8 875.0 870.4 DAY 22 12 17 9 22 26 4 7 2 27 3 5 MEAN QNH PRESSURE IN HPA 1013.6 1015.5 1013.5 1005.6 1005.9 1003.6 1003.7 1004.1 1009.7 1014.8 1015.0 1012.9 1009.8 MAX. QNH PRESSURE IN HPA 1026.8 1023.9 1021.5 1015.0 1011.3 1009.7 1009.0 1012.1 1016.6 1020.1 1021.7 1017.5 1026.8 DAY 5 20 7 25 8 10 15 25 23 23 17 15 MIN. QNH PRESSURE IN HPA 994.3 1001.6 1001.2 995.0 997.1 996.7 993.8 996.5 999.9 1006.3 1006.5 999.0 993.8 DAY 22 12 17 9 22 26 4 7 2 27 3 5 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 886.4 888.4 887.2 879.6 880.0 877.2 877.5 877.6 883.0 887.3 887.4 886.1 883.1 MAX. QFE PRESSURE IN HPA 897.0 896.0 894.0 888.0 885.6 882.0 883.0 885.0 889.0 891.0 894.0 890.0 897.0 DAY 1 20 5 25 8 8 7 25 23 15 17 2 MIN. QFE PRESSURE IN HPA 868.0 877.0 877.0 871.0 871.9 871.0 868.0 870.0 875.0 879.0 879.0 873.0 868.0 DAY 21 12 17 9 22 24 4 7 1 28 3 5 MEAN QNH PRESSURE IN HPA 1011.7 1013.9 1012.5 1004.1 1004.5 1001.4 1001.7 1001.9 1007.9 1012.6 1012.8 1011.3 1008.0 MAX. QNH PRESSURE IN HPA 1023.5 1022.3 1020.1 1013.4 1010.8 1006.8 1007.9 1010.1 1014.6 1016.8 1020.1 1015.7 1023.5 DAY 1 20 5 25 8 8 7 25 23 15 17 2 MIN. QNH PRESSURE IN HPA 991.2 1001.2 1001.2 994.5 995.5 994.5 991.2 993.4 999.0 1003.4 1003.4 996.7 991.2 DAY 21 12 17 9 22 24 4 7 1 28 3 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 886.5 888.0 886.9 879.1 879.2 876.7 876.5 876.7 882.5 886.7 887.7 885.7 882.7 MAX. QFE PRESSURE IN HPA 897.0 895.2 894.0 888.0 885.0 881.4 883.0 884.2 888.4 890.4 892.8 890.6 897.0 DAY 5 20 9 25 8 9 7 25 23 15 17 18 MIN. QFE PRESSURE IN HPA 868.0 877.0 879.0 871.0 870.4 870.0 867.0 868.2 874.8 879.0 880.0 873.0 867.0 DAY 21 11 17 9 27 24 4 7 1 28 25 5 MEAN QNH PRESSURE IN HPA 1011.7 1013.5 1012.2 1003.5 1003.6 1000.9 1000.6 1000.8 1007.3 1012.0 1013.1 1010.9 1007.5 MAX. QNH PRESSURE IN HPA 1023.5 1021.5 1020.1 1013.4 1010.1 1006.1 1007.9 1009.2 1013.9 1016.1 1018.8 1016.3 1023.5 DAY 5 20 9 25 8 9 7 25 23 15 17 18 MIN. QNH PRESSURE IN HPA 991.2 1001.2 1003.4 994.5 993.8 993.4 990.1 991.4 998.7 1003.4 1004.5 996.7 990.1 DAY 21 11 17 9 27 24 4 7 1 28 25 5 MEAN QFF PRESSURE IN HPA 1018.2 1019.7 1014.0 1003.9 999.5 995.6 994.5 994.9 1004.1 1010.4 1014.5 1015.0 1007.0 MAX. QFF PRESSURE IN HPA 1030.7 1031.6 1024.8 1015.2 1007.8 1002.6 1005.1 1005.4 1011.8 1015.6 1020.6 1021.2 1031.6 DAY 5 3 9 25 1 9 7 25 23 15 17 17 MIN. QFF PRESSURE IN HPA 994.3 1006.4 1003.0 993.9 988.3 987.1 982.4 984.1 994.5 1001.6 1003.5 998.9 982.4 DAY 21 12 17 9 22 24 3 7 1 28 2 5 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1975 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.7 0.0 6.2 15.6 16.2 22.8 27.9 25.1 19.1 10.8 4.3 -5.4 11.7 MINIMUN AIR TEMPERATURE (C) -6.6 -5.1 -2.0 5.3 8.2 11.8 16.5 12.7 9.1 2.1 -2.5 -9.5 3.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 25 16 14 0 0 0 0 0 0 0 10 27 92 DAYS WITH FREEZING MIN.<= 0 31 25 22 2 0 0 0 0 0 8 23 31 142 TEMPERATURE RECORDS LOWEST(C) -12.0 -12.0 -7.0 -2.0 3.0 9.0 14.0 7.0 6.0 -3.0 -14.0 -20.0 -20.0 DAY 26 12 16 1 2 5 31 19 13 31 29 15 MAXIMUM AIR TEMPERATURE (C) 3.1 4.5 11.9 21.5 21.7 29.0 34.6 32.3 25.7 18.0 10.1 -1.0 17.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 14 30 26 7 0 0 0 78 DAYS WITH MAXIMUM TEMP. <= 0 6 3 0 0 0 0 0 0 0 0 3 21 33 TEMPERATURE RECORDS HIGHEST(C) 9.0 9.0 22.0 27.0 30.0 36.0 37.0 38.0 35.0 23.0 16.0 4.0 38.0 DAY 10 17 23 11 31 29 1 6 5 9 21 22 DIF. BETWEEN (MAX.-MIN.) (C) 9.7 9.6 13.9 16.2 13.5 17.2 18.1 19.6 16.6 15.9 12.6 8.5 14.3 MEAN DAILY TEMP. (MDT) (C) -1.8 -0.3 5.0 13.4 14.9 20.4 25.6 22.5 17.4 10.1 3.8 -5.3 10.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 27.0 141.5 64.5 13.5 0.0 0.0 0.0 246.5 HEATING DEG. DAYS(BASE 18 0C) 612.5 512.0 403.5 139.5 99.0 6.5 0.0 3.0 55.0 246.0 425.5 721.0 3223.5 DEWPOINT (MEAN C) -6.0 -4.7 -3.0 4.9 9.0 11.1 15.5 11.8 8.9 3.5 -1.4 -9.0 3.4 MIXING RATIO (G/KG) 2.80 3.19 3.59 6.30 8.34 9.60 12.81 10.12 8.30 5.65 3.98 2.29 6.41 VAPOUR PRESSURE (HPA) 3.98 4.51 5.07 8.85 11.67 13.35 17.68 14.08 11.65 8.00 5.66 3.26 8.98 SATURATION DEF. (HPA) 1.64 1.88 5.24 10.09 7.73 16.32 21.99 20.40 12.38 5.80 3.20 1.04 8.98 RELATIVE HUMIDITY (MEAN %) 75 73 56 54 66 52 51 49 57 66 70 77 62 RELATIVE HUMIDITY (MAX. %) 91 89 83 86 94 93 93 93 93 96 93 89 91 RELATIVE HUMIDITY (MIN. %) 57 59 37 36 48 34 32 28 35 38 48 64 43 RELATIVE HUMIDITY (MEAN% 03UTC) 89 87 80 85 93 93 92 93 93 95 92 84 90 RELATIVE HUMIDITY (MEAN% 09UTC) 70 68 48 45 55 41 39 37 45 46 56 69 52 RELATIVE HUMIDITY (MEAN% 15UTC) 68 64 41 41 59 39 39 33 45 56 59 76 52 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 8.6 25.2 7.0 49.0 126.4 37.4 8.0 0.0 34.3 23.6 37.3 25.3 382.1 DAYS WITH PRECIPITATION >=10 0 1 0 3 2 1 0 0 1 1 1 0 10 DAYS WITH PRECIPITATION >= 5 0 2 0 3 8 2 1 0 3 1 2 3 25 DAYS WITH PRECIPITATION >= 1 5 4 4 4 15 6 1 0 3 5 3 7 57 DAYS WITH PRECIPITATION 7 6 9 4 20 7 1 0 5 5 3 9 76 GREATEST DAILY PRECIPITATION 2.0 15.0 2.0 16.0 44.0 22.0 8.0 0.0 22.0 15.0 28.0 6.0 44.0 DAY 5 21 19 20 6 15 18 ** 29 14 28 1 DAY WITH THUNDER STORM 0 0 1 0 1 0 0 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 1 1 1 0 0 0 0 0 0 0 2 5 10 DAYS WITH DUST 0 0 2 0 0 0 0 0 0 1 0 0 3 WIND DIRECTION (PREVAILING) 90 360 90 90 90 90 90 135 90 135 315 315 90 PREVAILING WIND SPEED(KNOTS) 12.0 18.3 13.6 11.4 8.8 11.3 10.7 9.1 11.5 9.8 11.0 13.1 11.3 PREVAILING WIND PERCENT 11.0 10.0 16.8 8.0 5.2 5.3 9.0 12.3 14.2 7.5 8.3 8.1 7.8 CALMS PERCENT OF WIND 83.9 74.3 48.4 70.7 81.3 85.3 78.1 71.0 69.7 80.1 73.3 82.3 75.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 155 186 180 186 1922 VECTOR WIND DIRECTION (MEAN) 73 344 43 360 32 79 106 96 100 99 15 313 58 VECTOR WIND MAGNITUDE(KNOTS) 0.9 1.9 1.4 1.0 0.8 0.9 1.5 1.9 2.5 0.9 0.9 1.1 0.9 WIND STEADINESES (MEAN %) 42.9 51.4 20.9 27.0 42.1 52.9 68.2 63.3 78.1 42.9 34.6 50.0 31.0 WIND SPEED (MEAN KNOTS) 2.1 3.7 6.7 3.7 1.9 1.7 2.2 3.0 3.2 2.1 2.6 2.2 2.9 FASTEST WIND DIRECTION 300 360 340 270 330 90 120 350 90 240 360 240 340 FASTEST WIND SPEED (KNOTS) 18 25 38 28 25 16 17 20 25 22 20 20 38 DAY 8 9 24 13 3 5 16 10 9 27 15 23 DAYS WITH SKY CLEAR (0-2)/8 16 9 15 17 5 26 30 29 16 18 8 12 201 DAYS WITH P.CLOUDY (3-6)/8 6 9 13 9 16 3 0 1 10 11 13 5 96 DAYS WITH CLOUDY (7-8)/8 9 10 3 4 10 1 1 1 4 2 9 14 68 DAYS WITH VISIBILITY =< 2 KM 0 0 3 0 0 0 0 0 0 0 2 4 9 DURATION OF SUNSHINE HOURS 132.2 114.5 228.5 244.3 210.5 225.3 321.4 333.7 225.4 228.9 146.4 106.8 2517.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 888.7 883.9 884.0 884.2 882.4 879.1 876.5 880.9 885.5 889.3 891.7 892.1 884.9 MAX. QFE PRESSURE IN HPA 900.0 897.0 894.6 895.4 890.0 886.0 884.0 892.3 898.0 898.4 902.0 901.4 902.0 DAY-HOUR 14- 6 17- 6 30- 6 2- 6 19- 6 8- 6 28- 6 18- 6 18- 6 17- 6 14- 6 14- 6 MIN. QFE PRESSURE IN HPA 880.0 865.0 868.0 876.0 876.0 869.0 867.0 871.2 872.6 880.0 880.2 875.0 865.0 DAY-HOUR 11-12 10-12 27- 3 14-12 16-15 30-15 1-15 11-15 9-15 9-12 28- 6 22-18 MEAN QNH PRESSURE IN HPA 1014.2 1008.8 1009.0 1009.2 1007.2 1003.5 1000.6 1005.5 1010.7 1014.9 1017.5 1018.0 1009.9 MAX. QNH PRESSURE IN HPA 1026.8 1023.5 1020.8 1021.7 1015.7 1011.2 1009.0 1018.2 1024.6 1025.0 1029.0 1028.4 1029.0 DAY-HOUR 14- 6 17- 6 30- 6 2- 6 19- 6 8- 6 28- 6 18- 6 18- 6 17- 6 14- 6 14- 6 MIN. QNH PRESSURE IN HPA 1004.5 987.8 991.2 1000.1 1000.1 992.3 990.1 994.7 996.3 1004.5 1004.8 999.0 987.8 DAY-HOUR 11-12 10-12 27- 3 14-12 16-15 30-15 1-15 11-15 9-15 9-12 28- 6 22-18 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1014.7 1020.4 1025.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.3 1033.0 1038.5 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** 17- 3 14- 6 14- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1003.1 1006.5 1002.5 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** 3-18 26-15 22-18 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 888.8 884.3 884.4 884.8 882.6 880.1 877.6 882.1 886.2 890.0 892.2 892.0 885.4 MAX. QFE PRESSURE IN HPA 898.0 895.6 894.2 894.4 888.0 885.6 883.0 892.0 895.6 897.8 900.6 900.0 900.6 DAY 14 17 31 3 19 17 28 18 18 17 14 14 MIN. QFE PRESSURE IN HPA 882.0 868.0 868.0 877.0 878.0 874.0 871.0 874.5 878.0 881.0 880.6 879.0 868.0 DAY 11 10 27 30 13 24 1 15 9 9 28 23 MEAN QNH PRESSURE IN HPA 1014.4 1009.4 1009.4 1009.9 1007.4 1004.6 1001.9 1006.9 1011.4 1015.6 1018.1 1017.9 1010.6 MAX. QNH PRESSURE IN HPA 1024.6 1021.9 1020.3 1020.6 1013.4 1010.8 1007.9 1017.9 1021.9 1024.3 1027.5 1026.8 1027.5 DAY 14 17 31 3 19 17 28 18 18 17 14 14 MIN. QNH PRESSURE IN HPA 1006.8 991.2 991.2 1001.2 1002.3 997.9 994.5 998.4 1002.3 1005.7 1005.2 1003.4 991.2 DAY 11 10 27 30 13 24 1 15 9 9 28 23 MEAN QFF PRESSURE IN HPA 1019.9 1013.9 1011.3 1007.4 1004.4 999.0 993.8 1000.3 1007.2 1015.7 1020.9 1025.5 1009.9 MAX. QFF PRESSURE IN HPA 1031.3 1026.7 1023.3 1020.2 1010.3 1006.9 1000.6 1014.1 1019.7 1025.3 1030.4 1037.6 1037.6 DAY 14 17 30 2 19 17 28 18 18 17 14 14 MIN. QFF PRESSURE IN HPA 1009.8 992.4 989.9 997.2 1000.1 990.9 986.6 990.9 996.7 1004.1 1006.9 1008.5 986.6 DAY 11 10 27 30 13 24 1 15 9 9 28 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 890.0 885.0 885.3 885.5 883.7 880.6 878.3 882.9 887.2 890.8 893.1 893.0 886.3 MAX. QFE PRESSURE IN HPA 900.0 897.0 894.6 895.4 890.0 886.0 884.0 892.3 898.0 898.4 902.0 901.4 902.0 DAY 14 17 30 2 19 8 28 18 18 17 14 14 MIN. QFE PRESSURE IN HPA 883.0 868.0 869.0 877.0 879.0 874.3 871.4 876.0 878.3 881.6 880.2 880.0 868.0 DAY 11 10 27 14 13 24 1 15 9 9 28 23 MEAN QNH PRESSURE IN HPA 1015.7 1010.1 1010.4 1010.6 1008.7 1005.2 1002.6 1007.8 1012.5 1016.5 1019.1 1019.0 1011.5 MAX. QNH PRESSURE IN HPA 1026.8 1023.5 1020.8 1021.7 1015.7 1011.2 1009.0 1018.2 1024.6 1025.0 1029.0 1028.4 1029.0 DAY 14 17 30 2 19 8 28 18 18 17 14 14 MIN. QNH PRESSURE IN HPA 1007.9 991.2 992.3 1001.2 1003.4 998.2 995.0 1000.1 1002.6 1006.3 1004.8 1004.5 991.2 DAY 11 10 27 14 13 24 1 15 9 9 28 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1015.9 1021.7 1026.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1025.3 1033.0 1038.5 ****** DAY ** ** ** ** ** ** ** ** ** 17 14 14 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1004.2 1008.9 1009.9 ****** DAY ** ** ** ** ** ** ** ** ** 9 28 23 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 889.5 884.4 884.4 884.7 883.1 879.7 877.4 881.8 886.3 890.1 892.4 892.7 885.5 MAX. QFE PRESSURE IN HPA 899.2 895.0 894.4 894.5 890.0 885.0 883.0 889.7 897.0 898.0 901.8 901.0 901.8 DAY 14 17 30 2 19 7 27 18 18 17 14 14 MIN. QFE PRESSURE IN HPA 882.0 866.4 868.8 877.0 879.0 873.4 870.0 874.0 876.6 880.8 881.4 880.0 866.4 DAY 11 10 27 14 13 30 1 15 9 9 28 22 MEAN QNH PRESSURE IN HPA 1015.1 1009.4 1009.4 1009.8 1007.9 1004.2 1001.6 1006.5 1011.6 1015.8 1018.3 1018.7 1010.7 MAX. QNH PRESSURE IN HPA 1025.9 1021.2 1020.6 1020.7 1015.7 1010.1 1007.9 1015.3 1023.5 1024.6 1028.8 1027.9 1028.8 DAY 14 17 30 2 19 7 27 18 18 17 14 14 MIN. QNH PRESSURE IN HPA 1006.8 989.4 992.1 1001.2 1003.4 997.2 993.4 997.9 1000.7 1005.4 1006.1 1004.5 989.4 DAY 11 10 27 14 13 30 1 15 9 9 28 22 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 887.5 882.7 882.8 883.3 881.6 878.1 875.3 879.5 884.1 888.2 890.5 891.2 883.7 MAX. QFE PRESSURE IN HPA 897.0 893.0 892.7 893.0 888.4 883.0 881.0 888.0 894.6 896.0 900.0 899.2 900.0 DAY 14 17 30 2 19 7 27 17 18 17 14 14 MIN. QFE PRESSURE IN HPA 880.0 865.0 870.0 876.0 877.0 871.0 868.0 872.0 874.0 880.0 882.0 877.0 865.0 DAY 11 10 27 14 16 30 1 15 9 9 26 22 MEAN QNH PRESSURE IN HPA 1012.9 1007.5 1007.7 1008.2 1006.4 1002.4 999.3 1003.9 1009.1 1013.7 1016.2 1017.0 1008.7 MAX. QNH PRESSURE IN HPA 1023.5 1019.0 1018.7 1019.0 1013.9 1007.9 1005.7 1013.4 1020.8 1022.3 1026.8 1025.9 1026.8 DAY 14 17 30 2 19 7 27 17 18 17 14 14 MIN. QNH PRESSURE IN HPA 1004.5 987.8 993.4 1000.1 1001.2 994.5 991.2 995.6 997.9 1004.5 1006.8 1001.2 987.8 DAY 11 10 27 14 16 30 1 15 9 9 26 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 887.6 883.0 883.0 882.7 881.2 877.0 874.0 878.2 883.5 887.9 890.5 891.5 883.3 MAX. QFE PRESSURE IN HPA 897.0 892.0 892.3 891.5 889.0 882.0 879.6 888.0 893.6 895.2 898.6 899.0 899.0 DAY 16 17 30 2 19 7 27 17 18 17 14 14 MIN. QFE PRESSURE IN HPA 881.0 868.0 871.0 876.0 876.0 869.0 867.0 871.2 872.6 880.6 881.0 875.4 867.0 DAY 5 10 26 14 16 30 1 11 9 3 26 22 MEAN QNH PRESSURE IN HPA 1013.0 1007.8 1007.9 1007.5 1005.8 1001.1 997.8 1002.5 1008.4 1013.4 1016.2 1017.4 1008.2 MAX. QNH PRESSURE IN HPA 1023.5 1017.9 1018.2 1017.3 1014.6 1006.8 1004.1 1013.4 1019.7 1021.5 1025.2 1025.7 1025.7 DAY 16 17 30 2 19 7 27 17 18 17 14 14 MIN. QNH PRESSURE IN HPA 1005.7 991.2 994.5 1000.1 1000.1 992.3 990.1 994.7 996.3 1005.2 1005.7 999.4 990.1 DAY 5 10 26 14 16 30 1 11 9 3 26 22 MEAN QFF PRESSURE IN HPA 1018.5 1012.3 1009.7 1004.9 1002.6 995.4 989.7 995.8 1004.2 1013.3 1019.0 1024.9 1007.5 MAX. QFF PRESSURE IN HPA 1029.9 1022.1 1020.5 1016.4 1011.1 1002.4 996.2 1008.3 1016.7 1022.6 1030.3 1037.5 1037.5 DAY 16 17 30 2 19 17 27 17 18 17 14 14 MIN. QFF PRESSURE IN HPA 1008.7 993.4 993.0 996.4 997.0 984.3 982.3 986.9 990.3 1003.8 1006.5 1002.7 982.3 DAY 11 10 26 13 16 30 1 11 9 3 26 22 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 889.1 891.5 892.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 896.6 898.4 899.0 ****** DAY ** ** ** ** ** ** ** ** ** 17 14 4 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 881.0 882.0 875.0 ****** DAY ** ** ** ** ** ** ** ** ** 3 30 22 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1014.6 1017.4 1017.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.0 1025.0 1025.7 ****** DAY ** ** ** ** ** ** ** ** ** 17 14 4 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1005.7 1006.8 999.0 ****** DAY ** ** ** ** ** ** ** ** ** 3 30 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1014.1 1020.0 1025.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1023.5 1029.9 1036.7 ****** DAY ** ** ** ** ** ** ** ** ** 17 14 4 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** 1003.1 1009.5 1002.5 ****** DAY ** ** ** ** ** ** ** ** ** 3 26 22 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1976 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.6 -4.7 4.0 11.7 15.3 21.2 24.1 27.1 20.5 13.7 6.6 3.4 11.7 MINIMUN AIR TEMPERATURE (C) -7.0 -9.8 -2.7 4.9 7.2 10.4 13.9 14.5 9.6 5.0 -1.7 -1.1 3.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 26 27 10 0 0 0 0 0 0 0 9 0 72 DAYS WITH FREEZING MIN.<= 0 31 28 24 0 0 0 0 0 0 1 26 28 138 TEMPERATURE RECORDS LOWEST(C) -15.0 -18.0 -18.0 1.0 3.0 6.0 8.0 10.0 4.0 -1.0 -5.0 -3.0 -18.0 DAY 14 12 2 15 1 11 5 23 30 31 18 1 MAXIMUM AIR TEMPERATURE (C) 2.3 0.1 8.9 16.9 21.0 27.6 30.9 34.5 27.0 19.6 12.5 7.2 17.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 9 23 31 8 0 0 0 71 DAYS WITH MAXIMUM TEMP. <= 0 10 16 2 0 0 0 0 0 0 0 0 0 28 TEMPERATURE RECORDS HIGHEST(C) 8.0 9.0 17.0 25.0 25.0 32.0 38.0 39.0 32.0 25.0 20.0 17.0 39.0 DAY 17 8 29 28 18 24 31 8 6 2 4 4 DIF. BETWEEN (MAX.-MIN.) (C) 9.3 9.9 11.6 12.0 13.8 17.2 17.0 20.0 17.4 14.6 14.2 8.3 13.8 MEAN DAILY TEMP. (MDT) (C) -2.4 -4.8 3.1 10.9 14.1 19.0 22.4 24.5 18.3 12.3 5.4 3.0 10.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 4.5 58.0 109.0 3.5 0.0 0.0 0.0 175.0 HEATING DEG. DAYS(BASE 18 0C) 632.0 662.0 462.0 214.0 120.5 15.5 2.0 0.0 29.0 176.5 379.0 463.5 3156.0 DEWPOINT (MEAN C) -7.3 -9.6 -3.4 4.6 9.5 12.2 13.8 12.7 9.4 6.1 0.4 -0.5 4.0 MIXING RATIO (G/KG) 2.53 2.19 3.55 6.12 8.61 10.30 11.54 10.83 8.54 6.81 4.54 4.20 6.65 VAPOUR PRESSURE (HPA) 3.59 3.11 5.03 8.62 12.05 14.37 16.01 15.06 11.98 9.59 6.46 5.97 9.32 SATURATION DEF. (HPA) 1.67 1.42 3.79 5.57 5.98 12.06 15.73 23.23 13.84 7.13 3.86 2.15 8.04 RELATIVE HUMIDITY (MEAN %) 72 71 62 65 71 60 56 46 54 64 67 78 64 RELATIVE HUMIDITY (MAX. %) 87 89 85 89 96 91 88 84 91 93 88 90 89 RELATIVE HUMIDITY (MIN. %) 56 55 44 46 52 40 39 27 35 47 49 66 46 RELATIVE HUMIDITY (MEAN% 03UTC) 82 86 84 88 95 91 87 84 91 93 87 88 88 RELATIVE HUMIDITY (MEAN% 09UTC) 65 63 52 55 58 47 44 35 42 52 58 73 54 RELATIVE HUMIDITY (MEAN% 15UTC) 67 64 51 59 66 50 44 34 43 59 67 78 57 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 8.0 34.3 19.3 65.1 120.4 26.2 2.0 0.0 4.0 15.0 5.0 40.6 339.9 DAYS WITH PRECIPITATION >=10 0 0 1 1 5 0 0 0 0 0 0 1 8 DAYS WITH PRECIPITATION >= 5 0 4 1 4 8 2 0 0 0 1 1 2 23 DAYS WITH PRECIPITATION >= 1 4 7 4 12 19 8 1 0 1 8 1 6 71 DAYS WITH PRECIPITATION 7 11 10 18 25 9 1 0 4 8 2 8 103 GREATEST DAILY PRECIPITATION 3.0 8.0 10.2 16.0 21.0 6.0 2.0 0.0 3.0 6.0 5.0 26.0 26.0 DAY 13 5 1 6 22 12 4 ** 14 20 25 10 DAY WITH THUNDER STORM 0 0 0 2 7 1 1 0 0 1 0 0 12 DAYS WITH SNOW OR SLEET 5 8 2 0 0 0 0 0 0 0 0 3 18 DAYS WITH DUST 1 1 0 0 0 0 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 315 90 315 315 315 135 135 90 135 90 135 315 135 PREVAILING WIND SPEED(KNOTS) 11.5 10.1 11.2 12.9 8.9 7.9 9.6 8.6 8.6 10.4 4.8 9.8 8.4 PREVAILING WIND PERCENT 23.7 9.8 16.7 7.8 10.8 18.9 23.2 10.3 16.7 10.3 7.3 8.4 9.3 CALMS PERCENT OF WIND 56.5 74.1 65.1 67.2 67.2 53.3 48.0 67.7 56.7 66.5 75.3 78.7 64.4 NO. OF WIND OBSERVATION 186 174 186 180 186 180 177 155 150 155 150 155 2034 VECTOR WIND DIRECTION (MEAN) 322 59 346 18 31 100 101 43 116 86 2 300 46 VECTOR WIND MAGNITUDE(KNOTS) 3.4 1.0 1.2 1.8 1.3 1.9 3.5 1.3 1.0 1.3 0.4 0.5 0.9 WIND STEADINESES (MEAN %) 65.4 32.3 33.3 43.9 39.4 46.3 68.6 43.3 27.0 39.4 22.2 27.8 25.7 WIND SPEED (MEAN KNOTS) 5.2 3.1 3.6 4.1 3.3 4.1 5.1 3.0 3.7 3.3 1.8 1.8 3.5 FASTEST WIND DIRECTION 350 330 330 80 360 360 120 340 360 90 340 300 330 FASTEST WIND SPEED (KNOTS) 28 30 25 20 20 20 20 22 20 18 16 18 30 DAY 5 8 12 8 8 2 1 6 26 18 25 25 DAYS WITH SKY CLEAR (0-2)/8 13 10 10 2 7 24 28 30 21 11 19 4 179 DAYS WITH P.CLOUDY (3-6)/8 13 11 12 13 19 6 3 1 7 13 10 12 120 DAYS WITH CLOUDY (7-8)/8 5 8 9 15 5 0 0 0 2 7 1 15 67 DAYS WITH VISIBILITY =< 2 KM 2 6 1 0 0 0 0 0 0 1 6 4 20 DURATION OF SUNSHINE HOURS 159.1 130.7 196.9 151.4 227.7 319.1 344.9 252.5 258.7 ****** ****** 82.1 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 886.5 887.7 886.5 884.9 883.8 882.5 879.1 880.7 884.3 886.1 891.2 888.9 885.2 MAX. QFE PRESSURE IN HPA 898.0 901.0 895.6 892.0 891.2 889.2 886.6 885.3 891.7 897.8 899.9 897.2 901.0 DAY-HOUR 9- 6 20- 6 27- 6 3- 6 2- 6 13- 6 6- 6 27- 3 11- 6 31- 9 13- 6 18-12 MIN. QFE PRESSURE IN HPA 873.0 870.8 874.0 877.0 876.1 876.1 872.0 873.6 878.2 879.5 880.4 873.4 870.8 DAY-HOUR 6- 9 10-12 13-12 17- 3 20-15 10- 9 10-15 30-15 7-15 25-15 25- 3 10-12 MEAN QNH PRESSURE IN HPA 1011.7 1013.1 1011.8 1010.0 1008.7 1007.4 1003.6 1005.4 1009.3 1011.3 1017.0 1014.4 1010.3 MAX. QNH PRESSURE IN HPA 1024.6 1027.9 1021.9 1017.9 1017.0 1014.8 1011.9 1010.4 1017.6 1024.3 1026.7 1023.7 1027.9 DAY-HOUR 9- 6 20- 6 27- 6 3- 6 2- 6 13- 6 6- 6 27- 3 11- 6 31- 9 13- 6 18-12 MIN. QNH PRESSURE IN HPA 996.7 994.3 997.9 1001.2 1000.2 1000.2 995.6 997.4 1002.5 1004.0 1005.0 997.2 994.3 DAY-HOUR 6- 9 10-12 13-12 17- 3 20-15 10- 9 10-15 30-15 7-15 25-15 25- 3 10-12 MEAN QFF PRESSURE IN HPA 1017.8 ****** 1014.5 1008.7 1005.7 1001.9 ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1032.5 ****** 1025.6 1018.5 1014.8 1012.2 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 9- 6 **-** 8- 6 3- 3 2- 3 13- 3 **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1000.2 ****** 1001.0 999.4 996.7 994.1 ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 6-15 **-** 13-15 17- 6 20-15 10-15 **-** **-** **-** **-** **-** **-** 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 886.9 888.1 886.7 885.3 884.4 883.7 880.3 881.9 885.2 886.3 891.6 888.9 885.8 MAX. QFE PRESSURE IN HPA 897.0 899.8 895.0 891.6 891.0 888.9 885.9 885.3 890.6 896.4 898.6 895.0 899.8 DAY 9 20 27 3 2 13 5 27 11 31 13 19 MIN. QFE PRESSURE IN HPA 875.0 874.6 875.0 877.0 877.8 877.1 875.1 879.1 880.9 880.5 880.4 875.5 874.6 DAY 6 10 13 17 21 10 11 30 20 26 25 10 MEAN QNH PRESSURE IN HPA 1012.3 1013.6 1012.0 1010.5 1009.5 1008.6 1004.8 1006.7 1010.3 1011.6 1017.5 1014.4 1011.0 MAX. QNH PRESSURE IN HPA 1023.5 1026.6 1021.2 1017.5 1016.8 1014.4 1011.1 1010.4 1016.3 1022.8 1025.2 1021.2 1026.6 DAY 9 20 27 3 2 13 5 27 11 31 13 19 MIN. QNH PRESSURE IN HPA 999.0 998.5 999.0 1001.2 1002.1 1001.3 999.1 1003.5 1005.5 1005.1 1005.0 999.5 998.5 DAY 6 10 13 17 21 10 11 30 20 26 25 10 MEAN QFF PRESSURE IN HPA 1018.1 1020.6 1014.9 1009.3 1006.7 1003.2 998.0 999.2 1005.7 1010.0 1019.5 1017.2 1010.2 MAX. QFF PRESSURE IN HPA 1031.5 1036.3 1023.8 1018.5 1014.8 1012.2 1008.7 1004.3 1013.5 1024.2 1028.2 1024.0 1036.3 DAY 9 20 2 3 2 13 5 27 29 31 13 19 MIN. QFF PRESSURE IN HPA 1002.2 1002.1 1002.6 999.5 999.2 994.8 991.0 995.1 1000.3 1001.7 1004.8 999.3 991.0 DAY 6 10 13 17 21 10 11 7 8 16 25 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 887.9 888.9 887.7 886.1 884.9 884.3 880.7 882.6 885.9 887.3 892.5 889.7 886.5 MAX. QFE PRESSURE IN HPA 898.0 901.0 895.6 892.0 891.2 889.2 886.6 885.3 891.7 897.4 899.9 895.5 901.0 DAY 9 20 27 3 2 13 6 27 11 31 13 17 MIN. QFE PRESSURE IN HPA 874.0 874.4 876.4 877.8 878.4 877.1 875.5 879.7 881.5 880.7 881.2 874.8 874.0 DAY 6 10 13 17 21 10 11 30 20 26 25 10 MEAN QNH PRESSURE IN HPA 1013.3 1014.4 1013.1 1011.3 1010.0 1009.3 1005.3 1007.4 1011.1 1012.6 1018.5 1015.4 1011.8 MAX. QNH PRESSURE IN HPA 1024.6 1027.9 1021.9 1017.9 1017.0 1014.8 1011.9 1010.4 1017.6 1023.9 1026.7 1021.8 1027.9 DAY 9 20 27 3 2 13 6 27 11 31 13 17 MIN. QNH PRESSURE IN HPA 997.9 998.3 1000.5 1002.1 1002.8 1001.3 999.5 1004.2 1006.2 1005.3 1005.9 998.7 997.9 DAY 6 10 13 17 21 10 11 30 20 26 25 10 MEAN QFF PRESSURE IN HPA 1019.3 1021.4 1015.7 1009.8 1006.5 1003.4 999.0 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1032.5 1036.1 1025.6 1018.1 1014.0 1011.3 1007.1 ****** ****** ****** ****** ****** ****** DAY 9 20 8 3 2 13 5 ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1001.2 1001.8 1004.3 999.4 997.9 995.5 991.0 ****** ****** ****** ****** ****** ****** DAY 6 10 13 17 20 10 11 ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 887.2 888.4 887.1 885.4 884.1 883.0 879.6 881.3 884.8 886.6 891.8 889.1 885.7 MAX. QFE PRESSURE IN HPA 897.2 900.2 895.0 891.7 889.4 888.3 885.1 883.8 891.0 897.8 898.8 895.2 900.2 DAY 9 20 8 3 2 26 5 27 28 31 13 17 MIN. QFE PRESSURE IN HPA 873.0 872.4 875.4 878.7 876.8 876.1 874.2 876.8 880.1 880.6 881.0 873.5 872.4 DAY 6 10 13 17 20 10 11 30 20 26 25 10 MEAN QNH PRESSURE IN HPA 1012.6 1013.9 1012.4 1010.6 1009.1 1007.9 1004.1 1006.0 1009.9 1011.8 1017.6 1014.7 1010.9 MAX. QNH PRESSURE IN HPA 1023.7 1027.0 1021.2 1017.6 1015.0 1013.8 1010.2 1008.8 1016.8 1024.3 1025.5 1021.5 1027.0 DAY 9 20 8 3 2 26 5 27 28 31 13 17 MIN. QNH PRESSURE IN HPA 996.7 996.1 999.4 1003.1 1001.0 1000.2 998.1 1001.0 1004.6 1005.2 1005.7 997.3 996.1 DAY 6 10 13 17 20 10 11 30 20 26 25 10 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 885.2 886.6 885.7 884.1 883.0 881.4 877.9 879.5 883.0 885.1 890.2 888.1 884.2 MAX. QFE PRESSURE IN HPA 895.0 898.4 893.4 889.8 888.0 887.0 883.4 882.5 888.8 896.5 897.1 897.2 898.4 DAY 9 20 8 2 2 26 5 26 28 31 13 18 MIN. QFE PRESSURE IN HPA 873.0 870.8 874.0 877.4 877.3 876.1 872.7 873.8 878.7 880.2 880.7 873.4 870.8 DAY 6 10 13 17 20 10 11 30 20 16 25 10 MEAN QNH PRESSURE IN HPA 1010.4 1011.9 1010.9 1009.1 1007.9 1006.1 1002.2 1004.0 1007.9 1010.3 1015.9 1013.6 1009.2 MAX. QNH PRESSURE IN HPA 1021.2 1025.0 1019.5 1015.4 1013.4 1012.3 1008.3 1007.3 1014.3 1022.9 1023.6 1023.7 1025.0 DAY 9 20 8 2 2 26 5 26 28 31 13 18 MIN. QNH PRESSURE IN HPA 996.7 994.3 997.9 1001.6 1001.5 1000.2 996.4 997.6 1003.1 1004.8 1005.3 997.2 994.3 DAY 6 10 13 17 20 10 11 30 20 16 25 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 885.3 886.6 885.4 883.9 882.6 880.8 877.2 878.5 882.6 885.0 890.1 888.5 883.9 MAX. QFE PRESSURE IN HPA 894.6 898.4 892.8 890.0 887.1 885.6 883.3 882.3 888.8 896.5 896.6 897.0 898.4 DAY 8 20 8 3 1 26 4 26 28 31 13 18 MIN. QFE PRESSURE IN HPA 873.0 871.0 874.2 878.2 876.1 876.1 872.0 873.6 878.2 879.5 880.7 875.5 871.0 DAY 6 10 13 5 20 10 10 30 7 25 25 10 MEAN QNH PRESSURE IN HPA 1010.4 1011.9 1010.6 1008.9 1007.5 1005.4 1001.4 1002.8 1007.4 1010.2 1015.8 1014.0 1008.9 MAX. QNH PRESSURE IN HPA 1020.8 1025.0 1018.8 1015.7 1012.4 1010.8 1008.2 1007.1 1014.3 1022.9 1023.0 1023.5 1025.0 DAY 8 20 8 3 1 26 4 26 28 31 13 18 MIN. QNH PRESSURE IN HPA 996.7 994.5 998.1 1002.5 1000.2 1000.2 995.6 997.4 1002.5 1004.0 1005.3 999.5 994.5 DAY 6 10 13 5 20 10 10 30 7 25 25 10 MEAN QFF PRESSURE IN HPA 1016.2 1019.0 1013.3 1007.6 1004.5 999.7 994.5 995.3 1002.8 1008.5 1017.6 1016.7 1008.0 MAX. QFF PRESSURE IN HPA 1027.2 1033.7 1022.1 1015.9 1010.7 1005.9 1004.7 1000.5 1012.1 1024.3 1026.0 1026.4 1033.7 DAY 9 20 2 3 1 12 4 26 28 31 13 18 MIN. QFF PRESSURE IN HPA 1000.2 1000.4 1001.0 1001.3 996.7 994.1 987.7 991.2 996.2 1000.5 1005.2 1001.1 987.7 DAY 6 10 13 17 20 10 10 20 7 16 24 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 886.3 887.8 886.5 884.7 883.6 882.3 879.1 ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 896.4 899.6 893.6 891.0 888.6 887.2 884.8 ****** ****** ****** ****** ****** ****** DAY 8 20 26 2 17 12 4 ** ** ** ** ** MIN. QFE PRESSURE IN HPA 876.2 874.6 875.4 879.8 877.0 877.1 873.0 ****** ****** ****** ****** ****** ****** DAY 6 10 13 5 20 23 10 ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1011.6 1013.2 1011.8 1009.8 1008.5 1007.1 1003.5 ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1022.8 1026.4 1019.7 1016.8 1014.1 1012.6 1009.9 ****** ****** ****** ****** ****** ****** DAY 8 20 26 2 17 12 4 ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1000.3 998.5 999.4 1004.3 1001.2 1001.3 996.7 ****** ****** ****** ****** ****** ****** DAY 6 10 13 5 20 23 10 ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1017.6 1020.2 1014.3 1008.2 1005.0 1001.1 996.6 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1030.5 1034.3 1023.1 1016.8 1010.9 1008.9 1006.3 ****** ****** ****** ****** ****** ****** DAY 9 20 2 2 1 12 4 ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1004.9 1004.2 1002.7 1002.3 997.1 994.4 988.4 ****** ****** ****** ****** ****** ****** DAY 6 10 13 16 20 23 11 ** ** ** ** ** 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1977 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -7.5 2.4 7.9 13.4 17.1 22.4 25.1 25.5 22.0 11.6 8.0 0.1 12.3 MINIMUN AIR TEMPERATURE (C) -13.0 -4.6 1.5 5.1 8.2 12.0 14.7 13.8 10.4 1.1 -0.4 -4.0 3.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 28 18 1 0 0 0 0 0 0 6 0 14 67 DAYS WITH FREEZING MIN.<= 0 31 28 14 1 0 0 0 0 0 16 24 26 140 TEMPERATURE RECORDS LOWEST(C) -23.0 -15.0 -4.0 0.0 4.0 9.0 10.0 9.0 8.0 -7.0 -3.0 -12.0 -23.0 DAY 9 1 6 21 20 3 2 19 27 23 1 25 MAXIMUM AIR TEMPERATURE (C) -3.2 8.0 12.2 18.8 22.6 28.6 30.9 32.5 29.1 18.1 14.0 3.6 17.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 14 23 22 16 0 0 0 75 DAYS WITH MAXIMUM TEMP. <= 0 26 2 0 0 0 0 0 0 0 0 0 8 36 TEMPERATURE RECORDS HIGHEST(C) 2.0 18.0 20.0 23.0 27.0 32.0 35.0 38.0 32.0 29.0 18.0 13.0 38.0 DAY 1 28 25 5 13 11 14 13 7 2 2 4 DIF. BETWEEN (MAX.-MIN.) (C) 9.8 12.6 10.7 13.7 14.4 16.6 16.2 18.7 18.7 17.0 14.4 7.6 14.2 MEAN DAILY TEMP. (MDT) (C) -8.1 1.7 6.9 11.9 15.4 20.3 22.8 23.2 19.7 9.6 6.8 -0.2 10.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 9.5 63.0 78.5 3.0 0.0 0.0 0.0 154.0 HEATING DEG. DAYS(BASE 18 0C) 809.5 456.5 345.5 182.0 82.5 7.0 0.0 0.5 3.5 260.5 324.0 564.0 3035.5 DEWPOINT (MEAN C) -10.4 -3.0 0.5 3.7 8.1 10.8 12.4 12.0 9.4 0.6 0.5 -3.5 3.4 MIXING RATIO (G/KG) 2.11 3.54 4.62 5.78 7.82 9.38 10.49 10.22 8.57 4.72 4.53 3.45 6.27 VAPOUR PRESSURE (HPA) 3.00 5.03 6.53 8.13 10.98 13.09 14.59 14.27 12.03 6.68 6.42 4.90 8.80 SATURATION DEF. (HPA) 0.72 2.83 4.66 7.98 9.46 15.48 18.84 20.61 16.09 8.52 5.00 1.63 9.32 RELATIVE HUMIDITY (MEAN %) 80 71 63 56 60 52 50 48 50 52 63 78 60 RELATIVE HUMIDITY (MAX. %) 86 89 87 87 93 87 85 86 89 86 89 88 88 RELATIVE HUMIDITY (MIN. %) 74 58 47 38 42 34 33 30 30 33 45 67 44 RELATIVE HUMIDITY (MEAN% 03UTC) 82 88 84 87 92 86 84 85 89 86 88 85 86 RELATIVE HUMIDITY (MEAN% 09UTC) 80 65 58 44 49 42 40 38 38 38 52 72 51 RELATIVE HUMIDITY (MEAN% 15UTC) 80 65 56 47 50 43 37 36 39 47 59 79 53 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 39.7 5.4 66.4 49.8 57.7 32.4 21.5 9.1 0.0 2.3 33.0 31.5 348.8 DAYS WITH PRECIPITATION >=10 2 0 3 1 2 0 0 0 0 0 1 1 10 DAYS WITH PRECIPITATION >= 5 3 1 3 6 5 3 3 1 0 0 1 2 28 DAYS WITH PRECIPITATION >= 1 8 1 7 8 9 8 4 2 0 1 3 9 60 DAYS WITH PRECIPITATION 14 3 9 12 14 9 5 3 1 3 3 10 86 GREATEST DAILY PRECIPITATION 12.0 5.2 26.0 12.0 20.0 8.0 7.0 7.0 0.0 1.4 30.0 11.0 30.0 DAY 6 9 18 30 26 3 10 7 ** 18 12 13 DAY WITH THUNDER STORM 0 0 0 1 1 4 1 0 0 1 0 1 9 DAYS WITH SNOW OR SLEET 11 2 1 1 0 0 0 0 0 0 1 4 20 DAYS WITH DUST 0 1 0 0 1 0 0 0 0 1 0 0 3 WIND DIRECTION (PREVAILING) 135 315 315 90 135 135 135 90 135 90 270 315 135 PREVAILING WIND SPEED(KNOTS) 6.4 10.4 9.8 7.1 8.4 6.8 9.0 9.3 5.7 7.7 7.6 13.5 7.5 PREVAILING WIND PERCENT 6.5 13.6 20.6 11.3 9.0 12.7 28.4 18.7 18.0 16.8 5.3 10.3 11.0 CALMS PERCENT OF WIND 85.8 66.4 52.9 60.7 64.5 49.3 41.9 52.9 57.3 63.2 84.7 75.5 62.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 114 10 354 9 40 83 111 100 52 88 299 319 72 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.4 1.4 1.4 0.5 1.3 4.3 3.1 1.1 1.7 0.3 1.4 0.9 WIND STEADINESES (MEAN %) 33.3 13.8 33.3 35.9 16.7 38.2 78.2 75.6 31.4 56.7 23.1 58.3 28.1 WIND SPEED (MEAN KNOTS) 0.9 2.9 4.2 3.9 3.0 3.4 5.5 4.1 3.5 3.0 1.3 2.4 3.2 FASTEST WIND DIRECTION 120 300 330 360 150 90 90 90 360 100 90 330 360 FASTEST WIND SPEED (KNOTS) 15 20 20 30 20 17 24 24 16 25 15 22 30 DAY 3 28 2 14 14 26 1 8 23 5 7 4 DAYS WITH SKY CLEAR (0-2)/8 7 11 7 7 5 17 25 25 26 16 17 7 170 DAYS WITH P.CLOUDY (3-6)/8 9 11 15 12 19 11 5 4 3 14 9 10 122 DAYS WITH CLOUDY (7-8)/8 15 6 9 11 7 2 1 2 1 1 4 14 73 DAYS WITH VISIBILITY =< 2 KM 5 2 1 0 0 0 0 0 0 1 0 7 16 DURATION OF SUNSHINE HOURS 82.6 172.7 180.9 184.7 206.2 266.0 249.5 ****** ****** 167.9 ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 888.6 889.9 887.0 883.3 884.8 881.0 879.6 883.0 885.7 888.3 888.3 887.9 885.6 MAX. QFE PRESSURE IN HPA 896.1 897.9 900.1 895.9 890.4 887.5 883.9 888.7 894.0 899.1 895.3 896.6 900.1 DAY-HOUR 13- 6 17- 6 9- 6 1- 6 28- 6 7- 6 22- 3 23- 6 30- 6 23- 6 27- 6 18- 9 MIN. QFE PRESSURE IN HPA 876.7 877.7 876.7 869.0 878.8 873.7 873.3 874.8 878.6 874.2 878.8 876.5 869.0 DAY-HOUR 19-15 7- 3 3-15 24- 9 6-15 28-15 2-15 26-15 8-15 17-12 11-15 5- 3 MEAN QNH PRESSURE IN HPA 1014.1 1015.6 1012.3 1008.3 1009.8 1005.6 1004.1 1007.9 1010.8 1013.7 1013.8 1013.4 1010.8 MAX. QNH PRESSURE IN HPA 1022.5 1024.5 1026.9 1022.2 1016.1 1012.9 1008.9 1014.2 1020.1 1025.8 1021.6 1023.0 1026.9 DAY-HOUR 13- 6 17- 6 9- 6 1- 6 28- 6 7- 6 22- 3 23- 6 30- 6 23- 6 27- 6 18- 9 MIN. QNH PRESSURE IN HPA 1000.9 1002.0 1000.9 992.3 1003.2 997.5 997.1 998.7 1003.0 998.1 1003.2 1000.6 992.3 DAY-HOUR 19-15 7- 3 3-15 24- 9 6-15 28-15 2-15 26-15 8-15 17-12 11-15 5- 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 888.7 890.3 887.5 884.0 885.6 882.2 880.9 884.3 886.8 889.2 888.8 887.8 886.3 MAX. QFE PRESSURE IN HPA 895.7 896.5 900.0 895.2 889.6 886.5 883.9 888.3 892.5 898.7 894.0 894.9 900.0 DAY 13 17 9 1 28 7 22 23 30 23 27 19 MIN. QFE PRESSURE IN HPA 877.7 877.7 878.4 869.8 881.6 878.4 876.5 878.5 882.2 878.8 879.2 876.5 869.8 DAY 20 7 4 24 6 28 27 26 11 17 12 5 MEAN QNH PRESSURE IN HPA 1014.2 1016.0 1012.9 1009.0 1010.7 1007.0 1005.5 1009.3 1012.1 1014.7 1014.3 1013.2 1011.6 MAX. QNH PRESSURE IN HPA 1022.0 1022.9 1026.8 1021.5 1015.2 1011.8 1008.9 1013.8 1018.4 1025.4 1020.1 1021.1 1026.8 DAY 13 17 9 1 28 7 22 23 30 23 27 19 MIN. QNH PRESSURE IN HPA 1002.0 1002.0 1002.8 993.2 1006.3 1002.8 1000.6 1002.9 1007.0 1003.2 1003.6 1000.6 993.2 DAY 20 7 4 24 6 28 27 26 11 17 12 5 MEAN QFF PRESSURE IN HPA 1022.8 1019.9 1013.6 1007.4 1007.5 1001.2 998.3 1002.3 1007.1 1014.6 1015.7 1017.6 1010.7 MAX. QFF PRESSURE IN HPA 1034.2 1026.8 1030.6 1022.3 1013.9 1007.4 1002.4 1007.9 1013.7 1030.8 1021.4 1028.7 1034.2 DAY 13 2 9 1 28 5 2 29 30 23 10 25 MIN. QFF PRESSURE IN HPA 1006.7 1006.0 1003.4 990.3 1003.2 995.6 992.3 994.9 1001.8 999.8 1004.2 1000.2 990.3 DAY 20 7 2 24 7 30 27 26 11 17 12 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 889.5 891.0 888.1 884.5 885.9 882.5 881.2 884.7 887.7 889.7 889.6 888.8 886.9 MAX. QFE PRESSURE IN HPA 896.1 897.9 900.1 895.9 890.4 887.5 883.8 888.7 894.0 899.1 895.3 896.5 900.1 DAY 13 17 9 1 28 7 22 23 30 23 27 18 MIN. QFE PRESSURE IN HPA 879.3 878.6 879.4 869.8 881.8 878.2 877.0 878.8 883.0 878.3 882.3 877.4 869.8 DAY 20 7 4 24 6 28 27 26 11 17 12 5 MEAN QNH PRESSURE IN HPA 1015.1 1016.8 1013.6 1009.5 1011.1 1007.3 1005.9 1009.8 1013.1 1015.4 1015.3 1014.3 1012.3 MAX. QNH PRESSURE IN HPA 1022.5 1024.5 1026.9 1022.2 1016.1 1012.9 1008.8 1014.2 1020.1 1025.8 1021.6 1022.9 1026.9 DAY 13 17 9 1 28 7 22 23 30 23 27 18 MIN. QNH PRESSURE IN HPA 1003.8 1003.0 1003.9 993.2 1006.5 1002.5 1001.2 1003.2 1007.9 1002.6 1007.1 1001.6 993.2 DAY 20 7 4 24 6 28 27 26 11 17 12 5 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 889.0 890.4 887.4 883.6 885.0 881.2 880.0 883.5 886.1 888.4 888.6 888.2 886.0 MAX. QFE PRESSURE IN HPA 895.7 897.0 899.2 895.9 889.7 887.3 882.7 887.5 891.5 898.3 893.6 896.6 899.2 DAY 13 14 9 1 28 7 31 23 30 23 26 18 MIN. QFE PRESSURE IN HPA 879.5 879.7 879.6 869.0 880.6 876.5 875.8 877.0 882.2 875.7 880.6 876.7 869.0 DAY 20 7 4 24 6 28 27 26 11 17 11 5 MEAN QNH PRESSURE IN HPA 1014.5 1016.1 1012.7 1008.6 1010.1 1005.9 1004.5 1008.4 1011.3 1013.9 1014.1 1013.7 1011.2 MAX. QNH PRESSURE IN HPA 1022.0 1023.5 1025.9 1022.2 1015.3 1012.7 1007.5 1012.9 1017.3 1024.9 1019.7 1023.0 1025.9 DAY 13 14 9 1 28 7 31 23 30 23 26 18 MIN. QNH PRESSURE IN HPA 1004.0 1004.2 1004.1 992.3 1005.2 1000.6 999.9 1001.2 1007.0 999.7 1005.2 1000.9 992.3 DAY 20 7 4 24 6 28 27 26 11 17 11 5 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 888.0 889.0 886.1 882.4 884.0 879.8 878.4 881.7 884.2 887.1 887.4 887.4 884.6 MAX. QFE PRESSURE IN HPA 893.9 895.1 897.2 893.5 888.2 886.4 882.1 885.2 890.8 896.9 893.6 895.5 897.2 DAY 13 17 9 1 28 7 31 29 30 23 26 18 MIN. QFE PRESSURE IN HPA 877.4 878.0 877.6 871.7 879.0 874.5 875.2 875.2 879.6 874.2 879.6 876.6 871.7 DAY 19 6 3 13 6 28 2 26 8 17 11 5 MEAN QNH PRESSURE IN HPA 1013.4 1014.6 1011.3 1007.2 1009.0 1004.3 1002.7 1006.4 1009.2 1012.5 1012.8 1012.8 1009.7 MAX. QNH PRESSURE IN HPA 1020.0 1021.3 1023.7 1019.6 1013.7 1011.7 1006.9 1010.3 1016.6 1023.3 1019.7 1021.8 1023.7 DAY 13 17 9 1 28 7 31 29 30 23 26 18 MIN. QNH PRESSURE IN HPA 1001.6 1002.3 1001.9 995.3 1003.4 998.4 999.2 999.2 1004.1 998.1 1004.1 1000.7 995.3 DAY 19 6 3 13 6 28 2 26 8 17 11 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 888.2 888.8 886.0 882.2 883.4 879.3 877.6 881.1 883.6 887.0 887.4 887.5 884.3 MAX. QFE PRESSURE IN HPA 894.3 894.9 896.6 893.1 888.0 885.5 881.9 884.8 890.6 896.5 893.4 896.3 896.6 DAY 12 16 9 1 27 7 31 22 30 23 26 18 MIN. QFE PRESSURE IN HPA 876.7 878.0 876.7 872.0 878.8 873.7 873.3 874.8 878.6 876.2 878.8 876.8 872.0 DAY 19 6 3 23 6 28 2 26 8 17 11 5 MEAN QNH PRESSURE IN HPA 1013.6 1014.4 1011.2 1007.0 1008.3 1003.8 1001.8 1005.8 1008.5 1012.3 1012.8 1012.9 1009.4 MAX. QNH PRESSURE IN HPA 1020.5 1021.1 1023.0 1019.1 1013.4 1010.7 1006.6 1009.9 1016.3 1022.9 1019.5 1022.7 1023.0 DAY 12 16 9 1 27 7 31 22 30 23 26 18 MIN. QNH PRESSURE IN HPA 1000.9 1002.3 1000.9 995.6 1003.2 997.5 997.1 998.7 1003.0 1000.3 1003.2 1001.0 995.6 DAY 19 6 3 23 6 28 2 26 8 17 11 5 MEAN QFF PRESSURE IN HPA 1022.3 1018.0 1012.0 1005.4 1004.9 998.0 994.7 998.8 1003.4 1012.1 1014.1 1017.3 1008.4 MAX. QFF PRESSURE IN HPA 1033.5 1027.1 1026.2 1019.3 1011.5 1005.5 1000.7 1004.5 1013.3 1027.5 1020.6 1026.7 1033.5 DAY 10 2 9 1 27 4 31 29 30 23 26 18 MIN. QFF PRESSURE IN HPA 1006.2 1005.7 1000.5 993.2 999.3 990.7 989.7 991.4 997.0 996.4 1003.8 1001.1 989.7 DAY 19 28 3 23 6 28 26 26 8 17 11 5 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1978 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.7 4.1 9.7 12.6 16.7 20.1 27.2 25.6 23.8 15.2 3.0 3.4 13.5 MINIMUN AIR TEMPERATURE (C) -2.4 -1.5 1.4 4.8 7.8 10.5 14.9 14.0 10.5 5.8 -2.5 -1.5 5.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 9 6 0 0 0 0 0 0 0 0 15 8 38 DAYS WITH FREEZING MIN.<= 0 26 21 16 3 0 0 0 0 0 0 27 27 120 TEMPERATURE RECORDS LOWEST(C) -8.0 -7.0 -3.0 -1.0 2.0 5.0 9.0 11.0 6.0 3.0 -6.0 -5.0 -8.0 DAY 31 25 4 15 2 3 3 21 27 2 22 24 MAXIMUM AIR TEMPERATURE (C) 4.1 8.9 15.5 17.4 22.0 25.6 33.7 32.4 30.9 21.3 7.4 8.1 18.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 9 26 28 22 1 0 0 86 DAYS WITH MAXIMUM TEMP. <= 0 7 0 0 0 0 0 0 0 0 0 1 0 8 TEMPERATURE RECORDS HIGHEST(C) 11.0 16.0 21.0 24.0 28.0 32.0 40.0 38.0 34.0 30.0 18.0 15.0 40.0 DAY 19 16 10 9 16 17 16 13 3 7 1 9 DIF. BETWEEN (MAX.-MIN.) (C) 6.5 10.4 14.1 12.6 14.2 15.1 18.8 18.4 20.4 15.5 9.9 9.6 13.8 MEAN DAILY TEMP. (MDT) (C) 0.9 3.7 8.5 11.1 14.9 18.1 24.3 23.2 20.7 13.6 2.4 3.3 12.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 7.0 112.0 69.5 18.0 0.0 0.0 0.0 206.5 HEATING DEG. DAYS(BASE 18 0C) 531.5 401.5 295.5 206.5 99.0 39.5 0.0 0.0 4.5 137.5 466.5 456.5 2638.5 DEWPOINT (MEAN C) -3.1 -1.8 -0.4 2.4 7.7 8.9 10.1 11.3 6.1 5.4 -3.4 -1.4 3.5 MIXING RATIO (G/KG) 3.50 3.85 4.27 5.31 7.62 8.31 9.10 9.76 6.88 6.51 3.41 3.99 6.04 VAPOUR PRESSURE (HPA) 4.97 5.46 6.02 7.47 10.68 11.62 12.71 13.62 9.67 9.21 4.85 5.64 8.49 SATURATION DEF. (HPA) 1.65 3.15 6.69 7.87 9.55 13.59 25.95 21.21 22.19 9.16 3.09 2.43 10.54 RELATIVE HUMIDITY (MEAN %) 77 69 54 54 60 53 39 45 38 58 67 74 57 RELATIVE HUMIDITY (MAX. %) 87 87 81 82 91 85 77 81 78 90 86 89 85 RELATIVE HUMIDITY (MIN. %) 65 54 36 38 42 37 23 29 20 39 53 56 41 RELATIVE HUMIDITY (MEAN% 03UTC) 85 85 81 81 90 85 77 81 78 89 84 87 84 RELATIVE HUMIDITY (MEAN% 09UTC) 72 63 46 45 47 43 29 36 26 45 58 64 48 RELATIVE HUMIDITY (MEAN% 15UTC) 77 60 41 44 52 45 26 30 25 51 69 75 50 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 23.5 24.0 45.0 31.5 81.7 46.7 0.0 0.0 2.0 10.4 31.0 23.1 318.9 DAYS WITH PRECIPITATION >=10 1 0 2 1 2 3 0 0 0 0 1 0 10 DAYS WITH PRECIPITATION >= 5 2 3 2 2 6 4 0 0 0 0 2 2 23 DAYS WITH PRECIPITATION >= 1 3 5 5 8 14 6 0 0 2 4 7 5 59 DAYS WITH PRECIPITATION 4 7 8 12 15 9 0 0 2 10 10 5 82 GREATEST DAILY PRECIPITATION 14.0 7.1 22.0 11.0 22.0 14.0 0.0 0.0 1.0 4.0 12.0 7.0 22.0 DAY 4 3 15 14 22 20 ** ** 7 24 14 13 DAY WITH THUNDER STORM 0 0 0 0 3 0 0 0 0 1 0 1 5 DAYS WITH SNOW OR SLEET 1 4 0 1 0 0 0 0 0 0 6 0 12 DAYS WITH DUST 2 0 0 0 2 0 0 0 0 1 2 1 8 WIND DIRECTION (PREVAILING) 315 315 315 90 135 135 135 90 315 90 315 315 90 PREVAILING WIND SPEED(KNOTS) 12.8 11.3 10.7 9.6 7.8 7.6 8.1 7.8 8.0 6.3 10.1 10.7 7.6 PREVAILING WIND PERCENT 15.5 16.4 19.4 12.0 21.9 19.3 18.1 18.7 14.0 11.6 9.3 13.5 11.3 CALMS PERCENT OF WIND 63.9 64.3 50.3 48.7 56.1 44.0 60.0 65.8 60.7 78.1 67.3 68.4 60.7 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 322 323 350 7 104 92 108 97 351 76 309 331 38 VECTOR WIND MAGNITUDE(KNOTS) 1.6 1.7 2.2 0.7 2.6 1.9 1.8 1.8 0.9 0.9 0.6 1.4 0.7 WIND STEADINESES (MEAN %) 41.0 50.0 44.9 13.7 72.2 47.5 60.0 62.1 31.0 64.3 21.4 50.0 20.6 WIND SPEED (MEAN KNOTS) 3.9 3.4 4.9 5.1 3.6 4.0 3.0 2.9 2.9 1.4 2.8 2.8 3.4 FASTEST WIND DIRECTION 310 330 360 280 360 30 60 180 100 90 270 330 310 FASTEST WIND SPEED (KNOTS) 25 20 25 25 25 20 15 20 20 20 20 20 25 DAY 20 16 10 5 13 9 2 14 19 13 29 8 DAYS WITH SKY CLEAR (0-2)/8 3 8 11 4 7 20 29 28 27 14 16 9 176 DAYS WITH P.CLOUDY (3-6)/8 15 6 10 15 17 5 2 3 3 10 6 15 107 DAYS WITH CLOUDY (7-8)/8 13 14 10 11 7 5 0 0 0 7 8 7 82 DAYS WITH VISIBILITY =< 2 KM 1 1 0 0 1 0 0 0 0 0 4 2 9 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 887.9 887.4 884.3 881.7 883.7 881.4 882.3 881.9 883.8 888.9 891.5 886.1 885.1 MAX. QFE PRESSURE IN HPA 900.2 897.8 897.2 889.6 893.1 890.8 890.1 887.6 894.3 896.3 898.8 896.3 900.2 DAY-HOUR 13- 6 5- 6 19- 3 12- 6 3- 6 11- 6 7- 6 9- 6 26- 6 10- 6 5- 6 24- 6 MIN. QFE PRESSURE IN HPA 872.4 876.2 867.7 869.2 873.7 869.3 872.3 876.0 875.5 880.6 881.9 871.5 867.7 DAY-HOUR 20-15 17-12 12- 3 25- 3 31-12 21- 6 1-15 13-15 4-15 31-12 13-12 16- 3 MEAN QNH PRESSURE IN HPA 1013.3 1012.8 1009.3 1006.4 1008.6 1006.1 1007.1 1006.7 1008.8 1014.4 1017.3 1011.3 1010.2 MAX. QNH PRESSURE IN HPA 1027.0 1024.3 1023.7 1015.2 1019.1 1016.6 1015.8 1013.0 1020.5 1022.7 1025.5 1022.7 1027.0 DAY-HOUR 13- 6 5- 6 19- 3 12- 6 3- 6 11- 6 7- 6 9- 6 26- 6 10- 6 5- 6 24- 6 MIN. QNH PRESSURE IN HPA 996.1 1000.3 990.8 992.5 997.5 992.6 996.0 1000.1 999.5 1005.2 1006.6 995.1 990.8 DAY-HOUR 20-15 17-12 12- 3 25- 3 31-12 21- 6 1-15 13-15 4-15 31-12 13-12 16- 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 888.0 887.8 885.0 882.4 884.6 882.3 883.4 883.3 884.8 889.4 891.8 886.5 885.8 MAX. QFE PRESSURE IN HPA 899.5 896.1 897.2 889.0 893.0 889.9 889.4 886.9 893.6 895.2 897.7 895.9 899.5 DAY 13 5 19 12 3 11 7 29 26 10 26 24 MIN. QFE PRESSURE IN HPA 878.4 877.0 867.7 869.2 876.2 869.8 875.4 878.3 878.7 882.6 882.5 871.5 867.7 DAY 21 22 12 25 31 21 1 14 4 31 8 16 MEAN QNH PRESSURE IN HPA 1013.4 1013.2 1010.1 1007.2 1009.7 1007.1 1008.3 1008.2 1009.9 1015.0 1017.6 1011.8 1011.0 MAX. QNH PRESSURE IN HPA 1026.2 1022.5 1023.7 1014.6 1019.0 1015.6 1015.0 1012.2 1019.7 1021.5 1024.2 1022.2 1026.2 DAY 13 5 19 12 3 11 7 29 26 10 26 24 MIN. QNH PRESSURE IN HPA 1002.8 1001.2 990.8 992.5 1000.3 993.2 999.4 1002.6 1003.1 1007.4 1007.3 995.1 990.8 DAY 21 22 12 25 31 21 1 14 4 31 8 16 MEAN QFF PRESSURE IN HPA 1017.5 1015.8 1010.1 1005.7 1006.5 1002.3 1000.7 1000.9 1004.3 1012.9 1021.0 1014.6 1009.3 MAX. QFF PRESSURE IN HPA 1031.0 1025.5 1025.5 1017.0 1018.1 1010.8 1009.4 1006.3 1015.8 1018.8 1028.0 1026.2 1031.0 DAY 13 5 19 13 3 7 7 21 26 10 25 24 MIN. QFF PRESSURE IN HPA 1004.3 1001.2 989.6 989.3 997.3 987.4 993.0 993.9 996.4 1006.0 1006.7 995.4 987.4 DAY 20 22 12 25 31 21 1 14 4 31 8 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 888.9 888.3 885.8 882.9 885.0 882.6 884.0 884.0 885.6 890.3 892.6 887.2 886.4 MAX. QFE PRESSURE IN HPA 900.2 897.8 895.9 889.6 893.1 890.8 890.1 887.6 894.3 896.3 898.8 896.3 900.2 DAY 13 5 19 12 3 11 7 9 26 10 5 24 MIN. QFE PRESSURE IN HPA 879.0 878.2 870.5 869.8 875.0 869.3 875.7 880.0 879.2 882.6 883.6 874.6 869.3 DAY 20 17 12 25 31 21 1 14 4 31 8 16 MEAN QNH PRESSURE IN HPA 1014.5 1013.8 1011.0 1007.7 1010.1 1007.5 1009.0 1009.0 1010.8 1016.0 1018.6 1012.6 1011.7 MAX. QNH PRESSURE IN HPA 1027.0 1024.3 1022.2 1015.2 1019.1 1016.6 1015.8 1013.0 1020.5 1022.7 1025.5 1022.7 1027.0 DAY 13 5 19 12 3 11 7 9 26 10 5 24 MIN. QNH PRESSURE IN HPA 1003.4 1002.5 994.0 993.2 999.0 992.6 999.7 1004.5 1003.6 1007.4 1008.5 998.5 992.6 DAY 20 17 12 25 31 21 1 14 4 31 8 16 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 888.4 887.8 884.7 882.0 884.0 881.7 882.6 882.3 884.2 889.2 891.8 886.5 885.4 MAX. QFE PRESSURE IN HPA 899.6 897.8 893.9 889.0 891.2 890.2 889.0 886.4 892.6 895.5 898.1 894.9 899.6 DAY 13 5 19 14 3 11 7 9 26 10 26 23 MIN. QFE PRESSURE IN HPA 875.5 877.2 869.1 870.2 874.2 871.6 874.5 878.7 877.9 881.1 883.2 876.1 869.1 DAY 4 17 12 25 31 21 1 13 4 31 8 16 MEAN QNH PRESSURE IN HPA 1013.9 1013.2 1009.7 1006.8 1009.0 1006.4 1007.4 1007.1 1009.2 1014.8 1017.7 1011.7 1010.6 MAX. QNH PRESSURE IN HPA 1026.4 1024.3 1020.0 1014.6 1017.0 1015.9 1014.6 1011.7 1018.6 1021.8 1024.7 1021.1 1026.4 DAY 13 5 19 14 3 11 7 9 26 10 26 23 MIN. QNH PRESSURE IN HPA 999.5 1001.4 992.4 993.6 998.1 995.2 998.4 1003.1 1002.2 1005.8 1008.1 1000.2 992.4 DAY 4 17 12 25 31 21 1 13 4 31 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 887.0 886.7 883.3 880.7 882.5 880.4 881.2 880.5 882.4 887.9 890.7 885.1 884.0 MAX. QFE PRESSURE IN HPA 898.1 896.2 892.7 887.8 890.6 888.7 887.3 884.9 890.4 893.7 896.8 893.7 898.1 DAY 13 5 19 13 2 11 7 21 26 10 25 23 MIN. QFE PRESSURE IN HPA 873.2 876.2 870.8 871.7 873.7 872.8 872.6 877.3 876.1 880.6 881.9 878.3 870.8 DAY 20 17 12 25 31 23 1 4 4 31 13 16 MEAN QNH PRESSURE IN HPA 1012.3 1012.0 1008.2 1005.3 1007.3 1005.0 1005.8 1005.1 1007.3 1013.3 1016.5 1010.3 1009.0 MAX. QNH PRESSURE IN HPA 1024.7 1022.6 1018.7 1013.2 1016.3 1014.2 1012.7 1010.0 1016.1 1019.8 1023.2 1019.8 1024.7 DAY 13 5 19 13 2 11 7 21 26 10 25 23 MIN. QNH PRESSURE IN HPA 997.0 1000.3 994.3 995.3 997.5 996.5 996.3 1001.5 1000.2 1005.2 1006.6 1002.6 994.3 DAY 20 17 12 25 31 23 1 4 4 31 13 16 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 887.2 886.7 882.9 880.6 882.3 879.9 880.6 879.6 882.0 887.7 890.7 885.2 883.8 MAX. QFE PRESSURE IN HPA 898.0 896.0 892.2 887.3 890.6 887.7 886.7 884.0 890.0 893.1 897.2 894.5 898.0 DAY 13 5 19 12 2 11 7 28 26 10 25 23 MIN. QFE PRESSURE IN HPA 872.4 877.3 870.7 871.8 874.3 872.3 872.3 876.0 875.5 880.6 881.9 878.2 870.7 DAY 20 17 12 24 31 30 1 13 4 31 13 1 MEAN QNH PRESSURE IN HPA 1012.6 1011.9 1007.8 1005.2 1007.1 1004.5 1005.2 1004.0 1006.7 1013.1 1016.4 1010.3 1008.7 MAX. QNH PRESSURE IN HPA 1024.6 1022.3 1018.1 1012.7 1016.3 1013.1 1012.0 1009.0 1015.7 1019.1 1023.7 1020.7 1024.6 DAY 13 5 19 12 2 11 7 28 26 10 25 23 MIN. QNH PRESSURE IN HPA 996.1 1001.5 994.2 995.4 998.2 996.0 996.0 1000.1 999.5 1005.2 1006.6 1002.5 994.2 DAY 20 17 12 24 31 30 1 13 4 31 13 1 MEAN QFF PRESSURE IN HPA 1016.5 1014.4 1007.7 1003.6 1003.8 999.5 997.5 996.7 1001.1 1010.9 1019.8 1013.0 1007.0 MAX. QFF PRESSURE IN HPA 1029.9 1026.1 1019.2 1014.1 1015.3 1007.7 1005.7 1002.8 1012.2 1018.2 1028.7 1024.7 1029.9 DAY 13 5 19 12 2 8 7 28 26 25 25 23 MIN. QFF PRESSURE IN HPA 997.0 1001.9 992.5 991.6 995.3 988.9 989.4 991.3 993.0 1004.7 1008.1 1003.8 988.9 DAY 20 17 12 24 20 30 25 13 4 31 8 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 KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 M MEANS AND EXTREMES FOR THE YEAR 1979 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.4 4.9 7.6 14.0 18.1 20.7 26.8 27.6 24.0 14.4 9.2 2.9 14.2 MINIMUN AIR TEMPERATURE (C) -3.4 -0.4 0.3 5.7 8.9 11.4 16.0 15.7 11.9 6.8 2.8 -1.5 6.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 17 3 5 0 0 0 0 0 0 0 0 7 32 DAYS WITH FREEZING MIN.<= 0 23 19 12 3 0 0 0 0 0 1 11 21 90 TEMPERATURE RECORDS LOWEST(C) -11.0 -6.0 -11.0 -1.0 5.0 9.0 11.0 13.0 6.0 0.0 -2.0 -10.0 -11.0 DAY 13 27 1 28 1 7 8 28 23 29 11 30 MAXIMUM AIR TEMPERATURE (C) 4.0 9.5 12.7 19.3 23.6 26.4 33.0 34.6 31.5 20.0 14.7 7.4 19.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 4 27 30 20 0 0 0 81 DAYS WITH MAXIMUM TEMP. <= 0 7 1 0 0 0 0 0 0 0 0 0 0 8 TEMPERATURE RECORDS HIGHEST(C) 16.0 17.0 21.0 29.0 28.0 35.0 37.0 38.0 37.0 28.0 21.0 12.0 38.0 DAY 4 14 31 4 21 30 11 16 2 1 1 2 DIF. BETWEEN (MAX.-MIN.) (C) 7.4 9.9 12.4 13.6 14.7 15.0 17.0 18.9 19.6 13.2 11.9 8.9 13.5 MEAN DAILY TEMP. (MDT) (C) 0.3 4.6 6.5 12.5 16.2 18.9 24.5 25.2 21.7 13.4 8.7 2.9 12.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 5.0 110.0 129.0 53.0 0.0 0.0 0.0 297.0 HEATING DEG. DAYS(BASE 18 0C) 549.5 375.5 355.5 166.5 63.0 8.0 0.0 0.0 3.5 144.0 278.0 468.0 2411.5 DEWPOINT (MEAN C) -4.1 -1.9 -1.2 2.8 7.9 11.4 12.3 10.1 6.9 6.8 3.9 -1.5 4.5 MIXING RATIO (G/KG) 3.28 3.88 4.15 5.50 7.66 9.73 10.37 8.94 7.32 7.17 5.77 3.96 6.48 VAPOUR PRESSURE (HPA) 4.65 5.48 5.85 7.74 10.78 13.61 14.44 12.50 10.31 10.11 8.18 5.61 9.11 SATURATION DEF. (HPA) 2.00 3.66 5.40 9.08 10.98 12.03 22.64 26.82 21.96 7.21 3.97 2.16 10.66 RELATIVE HUMIDITY (MEAN %) 74 65 58 52 56 59 45 38 39 64 72 75 58 RELATIVE HUMIDITY (MAX. %) 84 84 82 81 89 90 79 75 78 87 89 90 84 RELATIVE HUMIDITY (MIN. %) 64 50 42 36 39 41 28 21 19 46 54 59 42 RELATIVE HUMIDITY (MEAN% 03UTC) 81 83 80 80 88 90 79 75 77 86 87 89 83 RELATIVE HUMIDITY (MEAN% 09UTC) 69 55 50 43 44 47 38 28 28 54 60 66 49 RELATIVE HUMIDITY (MEAN% 15UTC) 73 60 50 41 46 51 29 25 27 64 74 76 51 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 31.4 27.8 31.8 45.1 40.9 72.7 9.0 16.4 1.0 24.1 21.4 16.3 337.9 DAYS WITH PRECIPITATION >=10 0 1 2 1 1 2 0 1 0 0 1 0 9 DAYS WITH PRECIPITATION >= 5 3 3 2 3 2 7 1 1 0 1 2 1 26 DAYS WITH PRECIPITATION >= 1 7 5 4 8 11 13 1 2 1 9 2 4 67 DAYS WITH PRECIPITATION 9 9 10 11 15 18 1 3 1 13 3 6 99 GREATEST DAILY PRECIPITATION 8.0 10.0 13.0 19.0 15.0 19.0 9.0 14.0 1.0 7.0 12.6 6.0 19.0 DAY 23 23 25 14 31 20 6 21 18 5 30 29 DAY WITH THUNDER STORM 1 0 0 1 3 3 1 0 0 0 0 0 9 DAYS WITH SNOW OR SLEET 5 5 2 0 0 0 0 0 0 0 1 3 16 DAYS WITH DUST 0 0 0 0 0 0 0 2 0 0 1 1 4 WIND DIRECTION (PREVAILING) 315 315 90 315 135 135 135 135 90 135 315 90 315 PREVAILING WIND SPEED(KNOTS) 13.2 9.4 7.4 11.5 8.1 7.8 10.5 7.6 10.3 7.2 11.3 5.3 10.6 PREVAILING WIND PERCENT 18.7 25.0 7.1 16.0 13.5 17.3 16.8 11.6 8.0 8.4 10.4 5.2 9.5 CALMS PERCENT OF WIND 69.0 55.0 78.7 52.0 54.8 61.3 55.5 55.5 67.3 75.5 74.2 81.2 65.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 163 154 1837 VECTOR WIND DIRECTION (MEAN) 305 303 75 342 75 127 123 113 335 45 337 340 359 VECTOR WIND MAGNITUDE(KNOTS) 2.6 1.9 0.3 1.5 1.1 1.6 2.3 0.3 0.4 0.2 1.0 0.6 0.3 WIND STEADINESES (MEAN %) 78.8 46.3 20.0 31.9 29.7 51.6 59.0 9.1 11.8 10.0 40.0 42.9 9.7 WIND SPEED (MEAN KNOTS) 3.3 4.1 1.5 4.7 3.7 3.1 3.9 3.3 3.4 2.0 2.5 1.4 3.1 FASTEST WIND DIRECTION 330 310 270 350 100 300 120 330 270 270 330 330 330 FASTEST WIND SPEED (KNOTS) 25 20 12 25 25 20 20 20 25 18 25 15 25 DAY 4 1 13 22 2 5 13 15 5 24 8 14 DAYS WITH SKY CLEAR (0-2)/8 9 5 11 9 9 12 30 25 24 14 10 12 170 DAYS WITH P.CLOUDY (3-6)/8 7 16 11 12 16 15 1 6 6 8 15 12 125 DAYS WITH CLOUDY (7-8)/8 15 7 9 9 6 3 0 0 0 9 5 7 70 DAYS WITH VISIBILITY =< 2 KM 3 2 1 1 0 0 0 0 1 0 0 3 11 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 888.5 884.3 885.4 884.3 885.9 884.0 881.0 882.5 886.8 887.9 890.1 886.5 885.6 MAX. QFE PRESSURE IN HPA 898.1 892.8 895.4 897.9 891.8 892.8 888.2 889.7 893.0 896.1 899.1 897.0 899.1 DAY-HOUR 18- 9 17- 6 2- 6 28- 3 11- 6 10- 6 20- 6 29- 6 21- 6 9- 6 11- 6 22- 9 MIN. QFE PRESSURE IN HPA 872.1 876.4 873.4 871.5 879.1 876.4 873.0 874.1 879.2 880.4 872.1 878.8 871.5 DAY-HOUR 4-12 11-12 27- 3 22-15 2-12 13-15 6-15 5-15 6-15 24-12 29-12 1-12 MEAN QNH PRESSURE IN HPA 1013.9 1009.3 1010.5 1009.3 1011.1 1009.0 1005.7 1007.3 1012.1 1013.4 1015.8 1011.7 1010.8 MAX. QNH PRESSURE IN HPA 1024.7 1018.8 1021.7 1024.5 1017.7 1018.8 1013.7 1015.3 1019.0 1022.5 1025.8 1023.5 1025.8 DAY-HOUR 18- 9 17- 6 2- 6 28- 3 11- 6 10- 6 20- 6 29- 6 21- 6 9- 6 11- 6 22- 9 MIN. QNH PRESSURE IN HPA 995.7 1000.5 997.2 995.1 1003.5 1000.5 996.7 998.0 1003.6 1005.0 995.7 1003.2 995.1 DAY-HOUR 4-12 11-12 27- 3 22-15 2-12 13-15 6-15 5-15 6-15 24-12 29-12 1-12 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 888.6 884.2 885.9 885.0 886.6 884.9 882.2 883.5 887.6 888.3 890.1 886.3 886.1 MAX. QFE PRESSURE IN HPA 897.3 891.6 895.2 897.9 891.2 892.4 887.3 889.0 892.0 895.2 898.4 896.4 898.4 DAY 18 17 2 28 11 11 20 29 21 9 11 22 MIN. QFE PRESSURE IN HPA 878.4 877.3 873.4 877.5 880.2 879.6 877.2 878.0 882.8 881.6 872.1 879.5 872.1 DAY 4 20 27 14 17 23 6 17 6 4 30 1 MEAN QNH PRESSURE IN HPA 1014.1 1009.2 1011.1 1010.1 1011.8 1010.0 1007.0 1008.5 1013.0 1013.8 1015.8 1011.6 1011.3 MAX. QNH PRESSURE IN HPA 1023.8 1017.5 1021.5 1024.5 1017.0 1018.3 1012.7 1014.6 1017.9 1021.5 1025.0 1022.8 1025.0 DAY 18 17 2 28 11 11 20 29 21 9 11 22 MIN. QNH PRESSURE IN HPA 1002.8 1001.5 997.2 1001.8 1004.8 1004.1 1001.4 1002.3 1007.7 1006.3 995.7 1004.0 995.7 DAY 4 20 27 14 17 23 6 17 6 4 30 1 MEAN QFF PRESSURE IN HPA 1018.3 1011.2 1012.3 1008.1 1008.1 1005.0 999.1 1000.6 1007.1 1011.8 1016.1 1014.7 1009.4 MAX. QFF PRESSURE IN HPA 1029.1 1020.7 1026.8 1025.7 1014.3 1015.2 1004.7 1007.5 1014.2 1020.2 1027.1 1027.7 1029.1 DAY 27 27 1 28 11 10 20 29 21 9 11 22 MIN. QFF PRESSURE IN HPA 1001.7 1003.6 996.8 999.9 1001.8 997.7 993.9 993.3 1000.3 1002.4 994.8 1005.7 993.3 DAY 4 20 27 14 3 23 2 17 17 4 30 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KHOY (40703) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 33 N LONGITUDE 44 58 E DATA PROCESSING CENTER ELEVATION 1103.0 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 889.3 885.3 886.6 885.7 887.2 885.5 882.8 884.2 888.5 889.2 891.0 887.2 886.9 MAX. QFE PRESSURE IN HPA 898.0 892.8 895.4 897.4 891.8 892.8 888.2 889.7 893.0 896.1 899.1 896.9 899.1 DAY 18 17 2 28 11 10 20 29 21 9 11 22 MIN. QFE PRESSURE IN HPA 877.8 877.5 875.0 878.0 881.0 879.6 876.7 878.5 883.0 881.9 873.6 880.0 873.6 DAY 4 20 27 14 16 23 6 17 5 24 30 1 MEAN QNH PRESSURE IN HPA 1014.9 1010.4 1011.9 1010.9 1012.5 1010.6 1007.6 1009.2 1014.0 1014.7 1016.8 1012.6 1012.2 MAX. QNH PRESSURE IN HPA 1024.6 1018.8 1021.7 1023.9 1017.7 1018.8 1013.7 1015.3 1019.0 1022.5 1025.8 1023.3 1025.8 DAY 18 17 2 28 11 10 20 29 21 9 11 22 MIN. QNH PRESSURE IN HPA 1002.1 1001.8 999.0 1002.3 1005.7 1004.1 1000.9 1002.9 1007.9 1006.6 997.4 1004.5 997.4 DAY 4 20 27 14 16 23 6 17 5 24 30 1 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 888.8 884.7 885.8 884.6 886.1 884.3 881.5 882.9 887.2 888.4 890.1 886.9 885.9 MAX. QFE PRESSURE IN HPA 898.1 892.1 895.0 896.4 890.9 891.9 886.8 888.5 891.4 895.6 898.1 897.0 898.1 DAY 18 18 1 28 11 10 20 29 21 9 11 22 MIN. QFE PRESSURE IN HPA 875.0 877.8 875.8 876.4 879.8 878.1 874.6 877.7 881.9 881.1 872.9 879.6 872.9 DAY 4 20 27 22 16 23 6 17 6 24 29 1 MEAN QNH PRESSURE IN HPA 1014.3 1009.8 1010.9 1009.6 1011.3 1009.3 1006.2 1007.8 1012.6 1013.8 1015.8 1012.2 1011.1 MAX. QNH PRESSURE IN HPA 1024.7 1018.0 1021.2 1022.8 1016.7 1017.8 1012.1 1014.0 1017.2 1021.9 1024.7 1023.5 1024.7 DAY 18 18 1 28 11 10 20 29 21 9 11 22 MIN. QNH PRESSURE IN HPA 999.0 1002.1 999.9 1000.5 1004.3 1002.4 998.5 1002.0 1006.6 1005.8 996.6 1004.1 996.6 DAY 4 20 27 22 16 23 6 17 6 24 29 1 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 887.8 883.5 884.5 883.3 885.0 883.0 879.8 881.3 885.7 886.9 888.9 885.8 884.6 MAX. QFE PRESSURE IN HPA 896.8 890.0 893.7 896.4 889.4 891.2 885.2 886.6 889.9 893.8 896.6 895.4 896.8 DAY 18 18 1 27 27 10 20 29 27 9 10 22 MIN. QFE PRESSURE IN HPA 872.1 876.4 875.5 872.0 879.1 877.1 873.3 875.4 880.0 880.4 872.1 878.8 872.0 DAY 4 11 25 22 2 13 6 5 5 24 29 1 MEAN QNH PRESSURE IN HPA 1013.2 1008.4 1009.5 1008.2 1010.0 1007.9 1004.3 1006.0 1010.9 1012.3 1014.4 1011.0 1009.7 MAX. QNH PRESSURE IN HPA 1023.2 1015.7 1019.8 1022.8 1015.0 1017.0 1010.3 1011.9 1015.6 1019.9 1023.0 1021.7 1023.2 DAY 18 18 1 27 27 10 20 29 27 9 10 22 MIN. QNH PRESSURE IN HPA 995.7 1000.5 999.5 995.6 1003.5 1001.3 997.1 999.4 1004.5 1005.0 995.7 1003.2 995.6 DAY 4 11 25 22 2 13 6 5 5 24 29 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****