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