STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.3 5.4 7.5 14.2 22.4 27.7 28.8 27.7 22.9 11.7 8.3 3.4 15.3 MINIMUN AIR TEMPERATURE (C) -3.7 -0.6 1.4 4.8 12.0 16.7 18.8 17.9 13.5 6.4 1.0 -0.5 7.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 6 4 0 0 0 0 10 DAYS WITH MINIMUM TEMP. <=-4 18 3 0 0 0 0 0 0 0 0 2 7 30 DAYS WITH FREEZING MIN.<= 0 28 17 13 5 0 0 0 0 0 0 12 14 89 TEMPERATURE RECORDS LOWEST(C) -8.4 -6.5 -3.8 -3.0 7.0 11.5 13.0 12.0 6.7 1.4 -8.0 -9.3 -9.3 DAY 14 12 22 6 6 16 4 30 24 12 30 31 MAXIMUM AIR TEMPERATURE (C) 8.8 10.7 12.0 20.1 28.8 34.1 34.9 34.1 29.4 16.0 14.0 6.8 20.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 14 29 29 26 14 2 0 0 114 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 2 2 TEMPERATURE RECORDS HIGHEST(C) 18.2 19.4 18.4 28.5 33.1 39.0 40.0 39.6 34.0 32.2 20.0 11.2 40.0 DAY 31 25 9 25 9 24 16 13 5 2 21 21 DIF. BETWEEN (MAX.-MIN.) (C) 12.5 11.3 10.6 15.3 16.8 17.4 16.1 16.2 15.9 9.6 13.0 7.3 13.5 MEAN DAILY TEMP. (MDT) (C) 2.5 5.1 6.7 12.4 20.4 25.4 26.9 26.0 21.5 11.2 7.5 3.1 14.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 12.5 131.5 182.3 151.4 40.5 0.4 0.0 0.0 518.7 HEATING DEG. DAYS(BASE 18 0C) 478.9 362.5 350.6 167.7 3.7 0.0 0.0 0.0 5.3 206.1 304.0 460.6 2339.5 DEWPOINT (MEAN C) -3.6 -0.9 -1.3 0.9 5.2 5.0 7.5 7.9 6.3 3.8 -0.3 -1.9 2.4 MIXING RATIO (G/KG) 3.34 4.11 4.07 4.79 6.48 6.38 7.56 7.86 6.95 5.81 4.35 3.91 5.47 VAPOUR PRESSURE (HPA) 4.77 5.85 5.76 6.79 9.16 9.00 10.63 11.05 9.83 8.28 6.21 5.57 7.74 SATURATION DEF. (HPA) 3.37 3.50 5.02 10.60 19.36 29.97 30.89 28.17 19.67 6.38 5.37 2.50 13.73 RELATIVE HUMIDITY (MEAN %) 63 67 57 45 36 26 29 33 38 63 58 70 49 RELATIVE HUMIDITY (MAX. %) 83 87 79 68 54 42 46 54 58 80 80 85 68 RELATIVE HUMIDITY (MIN. %) 45 48 40 29 23 16 18 19 23 50 38 57 34 RELATIVE HUMIDITY (MEAN% 03UTC) 80 85 78 66 52 42 46 54 56 78 80 82 67 RELATIVE HUMIDITY (MEAN% 09UTC) 55 57 49 38 31 21 24 27 31 57 49 64 42 RELATIVE HUMIDITY (MEAN% 15UTC) 57 61 48 34 29 20 22 25 31 60 51 68 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 1.3 29.4 25.5 19.1 11.3 3.0 0.2 2.6 2.0 86.2 5.2 50.9 236.7 DAYS WITH PRECIPITATION >=10 0 0 0 0 0 0 0 0 0 4 0 2 6 DAYS WITH PRECIPITATION >= 5 0 1 2 1 1 0 0 0 0 6 1 3 15 DAYS WITH PRECIPITATION >= 1 1 8 6 6 2 1 0 1 2 10 1 9 47 DAYS WITH PRECIPITATION 3 13 13 9 6 2 1 2 2 12 2 16 81 GREATEST DAILY PRECIPITATION 1.0 6.0 7.0 7.0 7.0 3.0 0.2 2.0 1.0 19.6 5.0 14.0 19.6 DAY 7 17 16 17 12 17 24 7 27 20 3 23 DAY WITH THUNDER STORM 0 0 0 1 5 3 1 1 1 1 0 0 13 DAYS WITH SNOW OR SLEET 0 3 3 0 0 0 0 0 0 0 0 3 9 DAYS WITH DUST 0 0 1 5 4 8 1 0 3 0 0 0 22 WIND DIRECTION (PREVAILING) 270 270 270 270 270 90 90 45 45 45 90 270 90 PREVAILING WIND SPEED(KNOTS) 12.0 6.4 10.7 12.5 8.9 9.5 10.0 11.3 9.5 8.4 4.3 5.5 7.6 PREVAILING WIND PERCENT 7.7 7.1 14.8 18.7 11.0 22.7 26.5 22.6 20.7 26.5 4.7 7.7 12.2 CALMS PERCENT OF WIND 61.9 73.6 54.8 54.7 49.7 33.3 33.5 34.8 48.0 54.8 80.7 70.3 54.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 283 298 279 260 209 73 69 61 60 60 350 304 50 VECTOR WIND MAGNITUDE(KNOTS) 1.5 0.9 1.3 2.7 1.1 3.2 4.0 3.8 2.9 2.8 0.1 0.3 0.9 WIND STEADINESES (MEAN %) 53.6 45.0 39.4 60.0 28.2 54.2 67.8 66.7 76.3 87.5 11.1 21.4 25.0 WIND SPEED (MEAN KNOTS) 2.8 2.0 3.3 4.5 3.9 5.9 5.9 5.7 3.8 3.2 0.9 1.4 3.6 FASTEST WIND DIRECTION 270 310 290 240 180 120 80 30 60 50 260 280 270 FASTEST WIND SPEED (KNOTS) 43 39 29 39 21 23 19 27 23 17 17 16 43 DAY 29 25 26 19 10 13 1 27 6 4 3 8 DAYS WITH SKY CLEAR (0-2)/8 9 3 5 13 8 24 28 24 27 11 15 4 171 DAYS WITH P.CLOUDY (3-6)/8 15 11 12 14 18 5 3 7 3 6 12 12 118 DAYS WITH CLOUDY (7-8)/8 7 14 14 3 5 1 0 0 0 14 3 15 76 DAYS WITH VISIBILITY =< 2 KM 0 2 0 0 0 0 0 0 0 0 0 1 3 DURATION OF SUNSHINE HOURS 176.9 136.1 160.3 244.3 245.6 312.3 359.7 325.3 282.1 149.7 209.2 89.3 2690.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 893.7 891.6 886.5 889.3 888.7 886.2 885.7 886.1 889.9 895.6 895.6 892.9 890.2 MAX. QFE PRESSURE IN HPA 904.0 901.1 898.0 898.8 896.4 892.3 893.9 895.6 897.0 903.0 909.0 907.0 909.0 DAY-HOUR 21- 6 1- 6 23- 6 22- 3 13- 3 28- 3 11- 3 8- 3 24- 6 16- 6 30- 6 1- 3 MIN. QFE PRESSURE IN HPA 881.3 880.0 874.5 878.6 881.6 880.0 879.3 878.5 883.0 884.5 883.0 883.5 874.5 DAY-HOUR 6-12 10-12 19- 9 4-12 22-15 9-15 7-12 24-15 5-15 3-12 6-15 24- 3 MEAN QNH PRESSURE IN HPA 1020.6 1018.3 1012.6 1015.7 1015.1 1012.3 1011.8 1012.1 1016.4 1022.8 1022.7 1019.8 1016.7 MAX. QNH PRESSURE IN HPA 1032.1 1028.9 1025.4 1026.3 1023.6 1019.1 1020.9 1022.7 1024.3 1031.0 1037.7 1035.4 1037.7 DAY-HOUR 21- 6 1- 6 23- 6 22- 3 13- 3 28- 3 11- 3 8- 3 24- 6 16- 6 30- 6 1- 3 MIN. QNH PRESSURE IN HPA 1006.8 1005.4 999.2 1003.8 1007.2 1005.4 1004.6 1003.7 1008.7 1010.4 1008.7 1009.3 999.2 DAY-HOUR 6-12 10-12 19- 9 4-12 22-15 9-15 7-12 24-15 5-15 3-12 6-15 24- 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 894.3 892.5 886.9 890.7 890.7 888.4 888.2 888.3 892.0 896.3 896.5 893.6 891.5 MAX. QFE PRESSURE IN HPA 903.2 900.8 897.6 898.8 896.4 892.3 893.9 895.6 896.8 902.2 908.5 907.0 908.5 DAY 21 1 23 22 13 28 11 8 24 16 30 1 MIN. QFE PRESSURE IN HPA 885.0 883.9 876.0 880.3 884.5 885.6 882.8 884.3 887.0 887.5 883.0 883.5 876.0 DAY 24 9 14 19 23 9 3 15 6 4 7 24 MEAN QNH PRESSURE IN HPA 1021.3 1019.3 1013.0 1017.3 1017.2 1014.8 1014.5 1014.6 1018.7 1023.6 1023.8 1020.5 1018.2 MAX. QNH PRESSURE IN HPA 1031.2 1028.5 1025.0 1026.3 1023.6 1019.1 1020.9 1022.7 1024.1 1030.1 1037.1 1035.4 1037.1 DAY 21 1 23 22 13 28 11 8 24 16 30 1 MIN. QNH PRESSURE IN HPA 1010.9 1009.7 1000.9 1005.7 1010.4 1011.6 1008.5 1010.2 1013.2 1013.7 1008.7 1009.3 1000.9 DAY 24 9 14 19 23 9 3 15 6 4 7 24 MEAN QFF PRESSURE IN HPA 1024.8 1021.2 1013.9 1015.6 1011.8 1007.0 1006.0 1006.6 1013.0 1022.5 1024.8 1023.3 1015.9 MAX. QFF PRESSURE IN HPA 1036.1 1030.4 1027.5 1026.3 1019.3 1012.3 1014.6 1013.9 1021.7 1029.6 1043.0 1041.3 1043.0 DAY 12 7 23 22 13 6 11 8 24 10 30 1 MIN. QFF PRESSURE IN HPA 1012.9 1011.1 1003.1 1004.1 1003.2 1003.4 1000.3 1001.2 1004.8 1009.5 1006.4 1010.6 1000.3 DAY 24 9 14 19 23 10 20 15 6 4 7 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 895.6 893.3 887.9 890.9 890.5 888.1 887.7 888.2 892.3 897.1 897.1 894.1 891.9 MAX. QFE PRESSURE IN HPA 904.0 901.1 898.0 898.0 896.1 892.1 892.8 895.3 897.0 903.0 909.0 907.0 909.0 DAY 21 1 23 22 13 28 11 8 24 16 30 1 MIN. QFE PRESSURE IN HPA 887.0 885.1 878.0 880.0 884.2 885.0 883.0 884.0 887.0 887.8 884.0 885.5 878.0 DAY 6 10 19 19 23 9 3 15 6 4 7 24 MEAN QNH PRESSURE IN HPA 1022.8 1020.2 1014.2 1017.5 1017.1 1014.4 1014.0 1014.5 1019.0 1024.4 1024.4 1021.1 1018.6 MAX. QNH PRESSURE IN HPA 1032.1 1028.9 1025.4 1025.4 1023.3 1018.8 1019.6 1022.4 1024.3 1031.0 1037.7 1035.4 1037.7 DAY 21 1 23 22 13 28 11 8 24 16 30 1 MIN. QNH PRESSURE IN HPA 1013.2 1011.1 1003.1 1005.4 1010.1 1010.9 1008.7 1009.8 1013.2 1014.1 1009.8 1011.5 1003.1 DAY 6 10 19 19 23 9 3 15 6 4 7 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 893.8 892.0 886.6 889.1 888.6 886.2 885.6 886.0 889.9 895.7 895.5 892.8 890.2 MAX. QFE PRESSURE IN HPA 902.1 899.0 896.0 895.8 894.5 890.0 890.5 893.0 894.5 901.5 907.0 905.0 907.0 DAY 12 22 23 22 13 6 10 8 25 16 30 1 MIN. QFE PRESSURE IN HPA 883.2 883.0 874.5 880.0 882.2 883.1 881.2 881.4 885.0 886.0 884.0 884.5 874.5 DAY 6 10 19 19 23 9 8 18 6 4 7 23 MEAN QNH PRESSURE IN HPA 1020.7 1018.7 1012.8 1015.6 1014.9 1012.3 1011.7 1012.0 1016.4 1022.9 1022.7 1019.7 1016.7 MAX. QNH PRESSURE IN HPA 1030.0 1026.5 1023.2 1023.0 1021.5 1016.5 1017.1 1019.9 1021.5 1029.3 1035.4 1033.2 1035.4 DAY 12 22 23 22 13 6 10 8 25 16 30 1 MIN. QNH PRESSURE IN HPA 1008.9 1008.7 999.2 1005.4 1007.8 1008.8 1006.7 1006.9 1010.9 1012.1 1009.8 1010.4 999.2 DAY 6 10 19 19 23 9 8 18 6 4 7 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 892.3 890.2 885.3 887.6 887.0 884.2 883.6 883.8 887.6 894.4 894.0 891.8 888.5 MAX. QFE PRESSURE IN HPA 900.2 898.3 893.3 893.0 892.0 888.0 889.2 891.0 892.0 899.3 905.5 902.9 905.5 DAY 20 6 23 22 13 28 10 8 25 16 30 1 MIN. QFE PRESSURE IN HPA 881.3 880.0 874.5 878.6 881.8 880.2 879.3 879.0 883.5 884.5 883.3 884.0 874.5 DAY 6 10 19 4 22 9 7 18 11 3 7 23 MEAN QNH PRESSURE IN HPA 1019.1 1016.7 1011.3 1013.9 1013.1 1010.1 1009.4 1009.6 1013.8 1021.4 1020.9 1018.6 1014.8 MAX. QNH PRESSURE IN HPA 1027.9 1025.8 1020.2 1019.9 1018.7 1014.3 1015.6 1017.6 1018.7 1026.9 1033.8 1030.9 1033.8 DAY 20 6 23 22 13 28 10 8 25 16 30 1 MIN. QNH PRESSURE IN HPA 1006.8 1005.4 999.2 1003.8 1007.4 1005.6 1004.6 1004.3 1009.3 1010.4 1009.0 1009.8 999.2 DAY 6 10 19 4 22 9 7 18 11 3 7 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 MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 892.6 890.2 885.6 888.0 886.9 884.1 883.6 884.0 887.8 894.7 894.7 892.3 888.7 MAX. QFE PRESSURE IN HPA 901.6 898.1 893.5 893.0 891.9 886.8 889.5 891.5 892.0 899.9 905.5 903.2 905.5 DAY 20 6 22 21 18 22 10 8 19 16 30 1 MIN. QFE PRESSURE IN HPA 882.4 881.0 876.1 879.0 881.6 880.0 879.5 878.5 883.0 885.5 883.0 885.0 876.1 DAY 6 10 13 25 22 9 20 24 5 3 6 23 MEAN QNH PRESSURE IN HPA 1019.4 1016.7 1011.7 1014.3 1013.0 1009.9 1009.4 1009.8 1014.1 1021.8 1021.7 1019.1 1015.1 MAX. QNH PRESSURE IN HPA 1029.4 1025.5 1020.4 1019.9 1018.6 1012.9 1016.0 1018.2 1018.7 1027.5 1033.8 1031.2 1033.8 DAY 20 6 22 21 18 22 10 8 19 16 30 1 MIN. QNH PRESSURE IN HPA 1008.0 1006.5 1001.0 1004.3 1007.2 1005.4 1004.8 1003.7 1008.7 1011.5 1008.7 1010.9 1001.0 DAY 6 10 13 25 22 9 20 24 5 3 6 23 MEAN QFF PRESSURE IN HPA 1022.8 1018.5 1012.5 1012.3 1007.4 1002.1 1000.8 1001.8 1008.3 1020.7 1022.8 1021.9 1012.7 MAX. QFF PRESSURE IN HPA 1033.7 1029.2 1022.9 1020.5 1014.6 1005.2 1009.1 1011.1 1015.3 1028.5 1039.5 1036.7 1039.5 DAY 20 6 22 6 5 6 10 27 19 26 30 1 MIN. QFF PRESSURE IN HPA 1010.7 1009.5 1003.9 1000.1 1000.3 997.3 995.3 995.2 1001.3 1007.4 1007.2 1011.5 995.2 DAY 6 10 13 25 23 9 19 24 5 3 6 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 MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.2 -2.4 7.7 13.4 19.7 25.2 27.7 26.1 23.2 16.6 8.4 2.3 13.8 MINIMUN AIR TEMPERATURE (C) -5.5 -5.8 0.8 6.1 9.9 14.5 18.5 18.2 13.6 9.0 1.6 -2.9 6.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 4 2 0 0 0 0 6 DAYS WITH MINIMUM TEMP. <=-4 18 22 2 0 0 0 0 0 0 0 3 8 53 DAYS WITH FREEZING MIN.<= 0 31 28 15 3 0 0 0 0 0 0 14 23 114 TEMPERATURE RECORDS LOWEST(C) -15.0 -12.8 -5.0 -2.6 4.8 10.8 11.0 13.4 9.8 4.4 -5.0 -17.0 -17.0 DAY 3 6 7 6 3 3 28 31 30 24 15 30 MAXIMUM AIR TEMPERATURE (C) 0.6 1.2 12.9 18.6 25.4 31.5 33.5 31.9 29.9 22.5 14.2 7.0 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 19 28 22 18 0 0 0 89 DAYS WITH MAXIMUM TEMP. <= 0 13 12 0 0 0 0 0 0 0 0 0 5 30 TEMPERATURE RECORDS HIGHEST(C) 7.6 11.8 19.6 23.6 30.6 36.7 40.8 36.8 35.7 28.3 23.5 16.6 40.8 DAY 31 1 19 17 18 13 31 12 9 5 8 3 DIF. BETWEEN (MAX.-MIN.) (C) 6.1 7.0 12.1 12.5 15.5 17.0 15.0 13.7 16.3 13.5 12.6 9.9 12.6 MEAN DAILY TEMP. (MDT) (C) -2.4 -2.3 6.8 12.3 17.7 23.0 26.0 25.0 21.8 15.8 7.9 2.1 12.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.2 62.3 156.1 126.7 38.3 0.3 0.0 0.0 385.0 HEATING DEG. DAYS(BASE 18 0C) 633.5 588.8 346.3 169.9 37.5 0.0 0.0 0.0 1.5 77.8 304.2 494.1 2653.7 DEWPOINT (MEAN C) -6.3 -6.9 -1.7 4.2 6.3 6.4 10.8 11.0 6.5 5.6 -1.4 -3.5 2.6 MIXING RATIO (G/KG) 2.77 2.66 3.95 6.21 6.96 7.06 9.42 9.51 6.99 6.52 4.18 3.47 5.81 VAPOUR PRESSURE (HPA) 3.96 3.80 5.60 8.78 9.82 9.93 13.18 13.34 9.89 9.27 5.95 4.95 8.21 SATURATION DEF. (HPA) 1.43 1.51 5.45 7.34 14.44 23.66 25.51 21.86 20.25 10.70 5.92 2.91 11.75 RELATIVE HUMIDITY (MEAN %) 75 73 56 58 46 34 37 42 38 53 54 69 53 RELATIVE HUMIDITY (MAX. %) 85 83 81 82 73 60 56 64 59 73 76 86 73 RELATIVE HUMIDITY (MIN. %) 64 61 37 41 29 20 26 28 23 37 37 52 38 RELATIVE HUMIDITY (MEAN% 03UTC) 83 82 78 82 73 59 56 63 58 71 75 84 72 RELATIVE HUMIDITY (MEAN% 09UTC) 69 66 48 48 38 26 32 35 32 47 45 59 45 RELATIVE HUMIDITY (MEAN% 15UTC) 74 74 45 51 35 27 32 37 31 45 47 66 47 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 40.3 64.0 50.8 79.2 35.6 10.4 28.0 19.5 1.0 37.2 19.0 56.6 441.6 DAYS WITH PRECIPITATION >=10 0 2 1 3 1 0 1 1 0 2 0 1 12 DAYS WITH PRECIPITATION >= 5 3 4 4 6 2 0 1 2 0 2 2 4 30 DAYS WITH PRECIPITATION >= 1 10 11 8 13 4 3 3 2 1 3 3 5 66 DAYS WITH PRECIPITATION 14 16 10 16 5 7 3 3 1 8 5 6 94 GREATEST DAILY PRECIPITATION 7.0 16.2 20.0 18.0 25.0 4.0 23.0 10.0 1.0 17.0 8.0 34.0 34.0 DAY 7 2 9 21 22 10 10 5 18 17 11 17 DAY WITH THUNDER STORM 0 0 1 8 5 7 1 2 2 0 0 1 27 DAYS WITH SNOW OR SLEET 15 13 3 0 0 0 0 0 0 0 0 5 36 DAYS WITH DUST 0 1 0 0 0 0 0 0 1 0 0 0 2 WIND DIRECTION (PREVAILING) 315 45 270 45 270 270 90 45 90 45 270 270 45 PREVAILING WIND SPEED(KNOTS) 3.5 3.3 9.8 6.5 12.5 10.4 10.8 9.2 9.2 6.6 8.6 5.5 8.1 PREVAILING WIND PERCENT 7.1 6.2 23.9 10.0 18.7 14.0 30.3 31.6 22.0 11.6 9.3 7.1 11.1 CALMS PERCENT OF WIND 71.6 82.8 52.3 60.7 51.6 49.3 34.8 33.5 54.0 72.9 76.7 83.2 60.2 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 347 9 281 34 294 347 66 60 69 32 278 270 36 VECTOR WIND MAGNITUDE(KNOTS) 0.5 0.1 2.7 0.6 1.6 0.6 5.8 4.9 2.6 0.5 1.0 0.6 0.9 WIND STEADINESES (MEAN %) 50.0 12.5 67.5 24.0 36.4 13.0 90.6 86.0 66.7 27.8 58.8 75.0 29.0 WIND SPEED (MEAN KNOTS) 1.0 0.8 4.0 2.5 4.4 4.6 6.4 5.7 3.9 1.8 1.7 0.8 3.1 FASTEST WIND DIRECTION 90 190 270 40 250 280 60 60 30 250 270 300 280 FASTEST WIND SPEED (KNOTS) 10 14 21 17 27 29 27 21 21 17 17 14 29 DAY 18 1 12 4 1 13 6 1 23 20 9 12 DAYS WITH SKY CLEAR (0-2)/8 1 4 9 4 15 20 29 19 29 16 13 11 170 DAYS WITH P.CLOUDY (3-6)/8 12 6 13 14 16 10 2 11 1 11 14 15 125 DAYS WITH CLOUDY (7-8)/8 18 19 9 12 0 0 0 1 0 4 3 5 71 DAYS WITH VISIBILITY =< 2 KM 2 4 2 0 1 0 0 0 0 0 1 5 15 DURATION OF SUNSHINE HOURS 77.9 84.8 212.9 196.4 325.3 317.8 363.6 320.1 319.1 221.7 185.9 154.6 2780.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 893.7 893.1 887.4 890.3 888.3 885.1 884.4 885.8 889.7 893.5 893.6 892.2 889.7 MAX. QFE PRESSURE IN HPA 905.5 905.0 898.0 901.6 897.1 891.2 891.8 894.3 897.3 901.2 902.4 901.1 905.5 DAY-HOUR 10- 6 6- 6 17- 3 8- 6 5- 6 8- 3 27- 3 21- 3 21- 6 16- 6 6- 6 29- 6 MIN. QFE PRESSURE IN HPA 884.2 877.5 873.5 880.8 879.2 877.5 878.0 877.1 882.3 885.3 884.7 873.6 873.5 DAY-HOUR 31-15 1-12 4-15 30-15 1-12 23-15 15-12 29-15 8-15 30-12 19-12 27- 3 MEAN QNH PRESSURE IN HPA 1020.6 1019.9 1013.5 1016.8 1014.6 1011.0 1010.3 1011.8 1016.1 1020.4 1020.5 1019.0 1016.2 MAX. QNH PRESSURE IN HPA 1033.8 1033.2 1025.4 1029.4 1024.4 1017.9 1018.5 1021.3 1024.6 1029.0 1030.3 1028.9 1033.8 DAY-HOUR 10- 6 6- 6 17- 3 8- 6 5- 6 8- 3 27- 3 21- 3 21- 6 16- 6 6- 6 29- 6 MIN. QNH PRESSURE IN HPA 1010.1 1002.6 998.1 1006.3 1004.5 1002.6 1003.1 1002.1 1007.9 1011.3 1010.6 998.2 998.1 DAY-HOUR 31-15 1-12 4-15 30-15 1-12 23-15 15-12 29-15 8-15 30-12 19-12 27- 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 894.1 893.5 888.3 891.5 890.0 887.1 886.5 887.8 891.6 894.6 894.5 892.7 891.0 MAX. QFE PRESSURE IN HPA 905.0 904.4 898.0 900.2 896.5 891.2 891.8 894.3 897.0 900.4 901.8 900.5 905.0 DAY 10 7 17 8 5 8 27 21 30 16 6 30 MIN. QFE PRESSURE IN HPA 886.0 880.0 877.0 884.0 882.6 882.0 882.0 882.0 886.5 888.0 887.0 873.6 873.6 DAY 26 2 3 30 1 24 15 29 5 20 20 27 MEAN QNH PRESSURE IN HPA 1021.1 1020.4 1014.6 1018.1 1016.5 1013.3 1012.7 1014.1 1018.3 1021.6 1021.5 1019.5 1017.6 MAX. QNH PRESSURE IN HPA 1033.2 1032.5 1025.4 1027.9 1023.8 1017.9 1018.5 1021.3 1024.3 1028.1 1029.7 1028.2 1033.2 DAY 10 7 17 8 5 8 27 21 30 16 6 30 MIN. QNH PRESSURE IN HPA 1012.1 1005.4 1002.0 1009.8 1008.3 1007.6 1007.6 1007.6 1012.6 1014.3 1013.2 998.2 998.2 DAY 26 2 3 30 1 24 15 29 5 20 20 27 MEAN QFF PRESSURE IN HPA 1026.7 1026.1 1015.5 1016.4 1012.0 1006.5 1004.6 1006.5 1012.5 1018.6 1022.4 1023.1 1015.9 MAX. QFF PRESSURE IN HPA 1042.8 1041.5 1026.7 1028.5 1022.4 1011.0 1013.5 1014.7 1020.8 1027.8 1031.5 1039.3 1042.8 DAY 3 7 17 9 5 27 27 21 30 16 15 30 MIN. QFF PRESSURE IN HPA 1015.2 1006.4 1002.5 1007.3 1003.2 1000.6 997.7 999.5 1006.2 1010.8 1013.4 1001.1 997.7 DAY 26 2 3 30 28 24 15 29 4 20 20 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 894.7 894.1 888.7 892.1 890.0 886.8 886.2 887.9 892.0 895.5 895.3 893.4 891.4 MAX. QFE PRESSURE IN HPA 905.5 905.0 898.0 901.6 897.1 891.0 891.2 894.3 897.3 901.2 902.4 901.1 905.5 DAY 10 6 17 8 5 12 27 21 21 16 6 29 MIN. QFE PRESSURE IN HPA 886.0 880.0 877.0 884.6 883.2 881.8 881.0 882.0 887.0 888.9 886.5 874.6 874.6 DAY 26 2 3 30 1 24 15 29 4 30 28 27 MEAN QNH PRESSURE IN HPA 1021.8 1021.1 1015.1 1018.8 1016.6 1012.9 1012.3 1014.1 1018.8 1022.6 1022.4 1020.3 1018.1 MAX. QNH PRESSURE IN HPA 1033.8 1033.2 1025.4 1029.4 1024.4 1017.6 1017.9 1021.3 1024.6 1029.0 1030.3 1028.9 1033.8 DAY 10 6 17 8 5 12 27 21 21 16 6 29 MIN. QNH PRESSURE IN HPA 1012.1 1005.4 1002.0 1010.5 1008.9 1007.4 1006.5 1007.6 1013.2 1015.3 1012.6 999.4 999.4 DAY 26 2 3 30 1 24 15 29 4 30 28 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 893.8 893.3 887.5 890.6 888.3 884.9 884.4 885.8 889.7 893.6 893.4 892.1 889.8 MAX. QFE PRESSURE IN HPA 905.0 904.2 895.5 901.2 895.2 889.4 889.0 891.2 895.2 901.0 900.0 900.2 905.0 DAY 10 6 17 8 5 12 27 21 30 16 6 29 MIN. QFE PRESSURE IN HPA 885.0 880.0 876.0 884.0 880.1 879.9 879.1 879.2 884.2 886.4 885.5 874.5 874.5 DAY 26 1 4 30 1 15 15 29 5 30 28 27 MEAN QNH PRESSURE IN HPA 1020.8 1020.1 1013.7 1017.1 1014.6 1010.9 1010.3 1011.9 1016.2 1020.6 1020.3 1018.9 1016.3 MAX. QNH PRESSURE IN HPA 1033.2 1032.3 1022.6 1029.0 1022.3 1015.8 1015.4 1017.9 1022.3 1028.8 1027.6 1027.9 1033.2 DAY 10 6 17 8 5 12 27 21 30 16 6 29 MIN. QNH PRESSURE IN HPA 1010.9 1005.4 1000.9 1009.8 1005.5 1005.3 1004.4 1004.5 1010.1 1012.5 1011.5 999.2 999.2 DAY 26 1 4 30 1 15 15 29 5 30 28 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 892.8 892.1 886.0 888.7 886.5 883.2 882.6 883.7 887.5 891.8 891.9 891.1 888.2 MAX. QFE PRESSURE IN HPA 903.0 903.3 894.0 900.0 893.8 887.6 887.7 890.3 893.8 900.0 898.0 899.2 903.3 DAY 9 6 16 8 5 12 27 5 30 16 6 29 MIN. QFE PRESSURE IN HPA 884.5 877.5 874.0 882.0 879.2 878.5 878.0 877.2 882.8 885.3 884.7 876.0 874.0 DAY 28 1 4 30 1 16 15 29 4 30 19 26 MEAN QNH PRESSURE IN HPA 1019.6 1018.9 1012.1 1015.0 1012.6 1009.0 1008.2 1009.5 1013.7 1018.5 1018.6 1017.7 1014.5 MAX. QNH PRESSURE IN HPA 1031.0 1031.3 1021.0 1027.6 1020.7 1013.8 1014.0 1016.8 1020.7 1027.6 1025.4 1026.8 1031.3 DAY 9 6 16 8 5 12 27 5 30 16 6 29 MIN. QNH PRESSURE IN HPA 1010.4 1002.6 998.7 1007.6 1004.5 1003.7 1003.1 1002.3 1008.5 1011.3 1010.6 1000.9 998.7 DAY 28 1 4 30 1 16 15 29 4 30 19 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 893.1 892.3 886.3 888.7 886.5 883.4 882.4 883.9 887.6 892.1 892.7 891.7 888.4 MAX. QFE PRESSURE IN HPA 903.5 904.0 894.2 899.8 894.2 890.4 887.6 890.0 895.0 900.2 900.0 900.0 904.0 DAY 9 6 16 8 5 9 26 5 30 16 5 29 MIN. QFE PRESSURE IN HPA 884.2 878.0 873.5 880.8 881.0 877.5 879.0 877.1 882.3 886.0 885.1 876.5 873.5 DAY 31 1 4 30 24 23 15 29 8 30 19 26 MEAN QNH PRESSURE IN HPA 1020.0 1019.1 1012.4 1015.1 1012.6 1009.1 1008.0 1009.7 1013.8 1018.9 1019.5 1018.5 1014.7 MAX. QNH PRESSURE IN HPA 1031.6 1032.1 1021.2 1027.4 1021.2 1017.0 1013.8 1016.5 1022.1 1027.9 1027.6 1027.6 1032.1 DAY 9 6 16 8 5 9 26 5 30 16 5 29 MIN. QNH PRESSURE IN HPA 1010.1 1003.1 998.1 1006.3 1006.5 1002.6 1004.3 1002.1 1007.9 1012.1 1011.1 1001.5 998.1 DAY 31 1 4 30 24 23 15 29 8 30 19 26 MEAN QFF PRESSURE IN HPA 1025.5 1024.8 1013.1 1013.2 1007.9 1002.3 999.8 1002.1 1008.0 1015.8 1020.4 1022.1 1012.9 MAX. QFF PRESSURE IN HPA 1040.0 1041.2 1022.4 1027.7 1019.9 1011.1 1008.1 1010.9 1018.8 1026.9 1028.2 1038.6 1041.2 DAY 3 6 16 8 5 9 27 5 30 16 22 29 MIN. QFF PRESSURE IN HPA 1012.9 1003.1 999.8 1002.5 999.8 995.9 995.5 994.5 1000.5 1008.8 1011.3 1005.0 994.5 DAY 31 1 4 30 27 23 15 29 8 9 19 26 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 MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -9.5 -10.2 6.9 17.2 20.9 27.5 30.5 29.2 23.8 18.3 10.4 4.1 14.1 MINIMUN AIR TEMPERATURE (C) -14.6 -15.6 1.4 7.1 10.0 16.2 20.3 20.1 14.0 10.1 4.4 -1.6 6.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 13 10 0 0 0 0 24 DAYS WITH MINIMUM TEMP. <=-4 31 28 1 0 0 0 0 0 0 0 2 10 72 DAYS WITH FREEZING MIN.<= 0 31 28 7 0 0 0 0 0 0 0 4 22 92 TEMPERATURE RECORDS LOWEST(C) -22.7 -25.6 -6.6 1.6 5.4 12.8 17.2 16.4 6.4 2.4 -6.0 -7.0 -25.6 DAY 16 7 1 3 1 12 16 18 20 24 22 6 MAXIMUM AIR TEMPERATURE (C) -4.9 -5.3 11.3 23.6 27.0 33.9 36.9 35.7 30.6 24.3 14.9 8.8 19.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 8 25 31 29 17 5 0 0 115 DAYS WITH MAXIMUM TEMP. <= 0 28 26 0 0 0 0 0 0 0 0 0 0 54 TEMPERATURE RECORDS HIGHEST(C) 3.0 3.2 22.4 28.3 33.6 38.8 39.7 40.2 38.0 32.6 22.0 12.7 40.2 DAY 21 28 25 17 30 29 21 8 2 5 29 11 DIF. BETWEEN (MAX.-MIN.) (C) 9.7 10.3 9.9 16.5 17.0 17.7 16.6 15.6 16.6 14.2 10.5 10.4 13.7 MEAN DAILY TEMP. (MDT) (C) -9.8 -10.5 6.4 15.3 18.5 25.0 28.6 27.9 22.3 17.2 9.6 3.6 12.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 10.4 118.4 235.1 212.7 77.3 10.0 0.0 0.0 664.0 HEATING DEG. DAYS(BASE 18 0C) 860.7 796.7 360.5 82.3 28.6 0.0 0.0 0.0 14.8 62.0 251.6 446.1 2903.3 DEWPOINT (MEAN C) -13.1 -14.6 0.8 2.1 4.2 5.7 8.8 9.2 4.4 2.4 2.5 -1.6 0.9 MIXING RATIO (G/KG) 1.68 1.51 4.65 5.13 6.02 6.70 8.34 8.55 6.15 5.30 5.34 3.89 5.27 VAPOUR PRESSURE (HPA) 2.41 2.18 6.60 7.30 8.53 9.45 11.72 12.01 8.70 7.55 7.60 5.55 7.47 SATURATION DEF. (HPA) 0.77 0.92 3.94 13.51 17.51 29.14 33.80 30.40 23.35 15.03 5.43 2.92 14.73 RELATIVE HUMIDITY (MEAN %) 76 72 69 41 38 28 29 33 33 40 61 69 49 RELATIVE HUMIDITY (MAX. %) 88 87 88 70 63 48 47 52 53 59 83 88 69 RELATIVE HUMIDITY (MIN. %) 61 57 53 23 21 15 17 19 18 28 45 51 34 RELATIVE HUMIDITY (MEAN% 03UTC) 86 85 87 69 63 48 47 52 52 56 81 87 68 RELATIVE HUMIDITY (MEAN% 09UTC) 72 61 63 32 30 23 24 27 28 35 52 60 42 RELATIVE HUMIDITY (MEAN% 15UTC) 76 72 61 30 27 19 21 26 24 35 55 64 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 43.2 10.5 58.4 12.0 14.7 0.2 0.0 6.0 15.0 45.8 8.2 12.0 226.0 DAYS WITH PRECIPITATION >=10 2 0 1 1 0 0 0 0 1 1 0 0 6 DAYS WITH PRECIPITATION >= 5 4 0 4 1 1 0 0 0 1 2 0 1 14 DAYS WITH PRECIPITATION >= 1 7 3 11 2 5 0 0 2 1 4 3 3 41 DAYS WITH PRECIPITATION 9 9 13 2 11 1 0 4 1 6 5 5 66 GREATEST DAILY PRECIPITATION 11.0 3.0 16.0 11.0 6.0 0.2 0.0 3.0 15.0 32.0 3.0 5.0 32.0 DAY 13 2 29 13 18 12 ** 17 19 30 14 5 DAY WITH THUNDER STORM 0 0 0 6 7 0 0 5 2 3 0 0 23 DAYS WITH SNOW OR SLEET 11 10 4 0 0 0 0 0 0 0 0 2 27 DAYS WITH DUST 0 0 0 0 1 0 0 1 0 2 0 0 4 WIND DIRECTION (PREVAILING) 45 45 90 45 270 90 90 45 45 270 270 270 45 PREVAILING WIND SPEED(KNOTS) 12.0 5.1 7.8 6.2 9.1 6.6 9.3 10.2 8.1 11.4 5.8 7.2 8.4 PREVAILING WIND PERCENT 2.6 11.4 5.8 9.3 11.6 20.0 36.1 26.5 17.3 14.8 8.7 6.5 11.3 CALMS PERCENT OF WIND 92.9 85.7 76.1 59.3 57.4 46.0 29.0 41.3 66.7 60.0 78.0 84.5 64.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 27 62 13 336 286 61 72 62 41 317 277 275 48 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.7 0.4 0.9 1.0 1.7 5.3 4.5 1.3 1.1 0.4 0.5 1.0 WIND STEADINESES (MEAN %) 40.0 87.5 21.1 26.5 32.3 47.2 85.5 86.5 54.2 29.7 33.3 62.5 37.0 WIND SPEED (MEAN KNOTS) 0.5 0.8 1.9 3.4 3.1 3.6 6.2 5.2 2.4 3.7 1.2 0.8 2.7 FASTEST WIND DIRECTION 30 50 260 340 260 50 80 40 50 260 60 280 340 FASTEST WIND SPEED (KNOTS) 17 12 19 27 27 23 19 21 23 27 12 12 27 DAY 3 13 31 10 7 20 16 1 14 7 6 5 DAYS WITH SKY CLEAR (0-2)/8 14 13 6 10 19 28 30 23 27 20 11 16 217 DAYS WITH P.CLOUDY (3-6)/8 13 6 11 18 10 2 1 8 3 6 12 11 101 DAYS WITH CLOUDY (7-8)/8 4 9 14 2 2 0 0 0 0 5 7 4 47 DAYS WITH VISIBILITY =< 2 KM 5 1 0 0 0 0 0 0 0 0 0 0 6 DURATION OF SUNSHINE HOURS 148.8 129.4 129.5 269.0 300.4 364.9 361.9 311.6 308.8 231.1 161.2 147.3 2863.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 895.3 898.6 890.1 892.0 890.3 886.3 886.2 886.6 889.4 893.8 894.4 893.3 891.3 MAX. QFE PRESSURE IN HPA 902.6 908.3 898.0 898.0 897.0 892.0 893.0 895.2 901.0 903.1 901.0 900.4 908.3 DAY-HOUR 22- 6 8- 6 7- 6 20- 6 1- 3 6- 3 10- 3 19- 6 22- 6 24- 6 22- 6 18- 6 MIN. QFE PRESSURE IN HPA 886.6 888.7 877.5 885.8 882.5 878.0 876.8 877.0 880.6 884.8 888.2 887.5 876.8 DAY-HOUR 1-12 23- 3 28-12 13-12 6-15 9-15 5-15 1-12 13-15 1-12 19-12 31-12 MEAN QNH PRESSURE IN HPA 1022.4 1026.1 1016.6 1018.7 1016.8 1012.3 1012.3 1012.7 1015.8 1020.8 1021.4 1020.2 1018.0 MAX. QNH PRESSURE IN HPA 1030.5 1036.9 1025.4 1025.4 1024.3 1018.7 1019.9 1022.3 1028.8 1031.1 1028.8 1028.1 1036.9 DAY-HOUR 22- 6 8- 6 7- 6 20- 6 1- 3 6- 3 10- 3 19- 6 22- 6 24- 6 22- 6 18- 6 MIN. QNH PRESSURE IN HPA 1012.7 1015.1 1002.6 1011.8 1008.2 1003.1 1001.8 1002.0 1006.0 1010.7 1014.5 1013.7 1001.8 DAY-HOUR 1-12 23- 3 28-12 13-12 6-15 9-15 5-15 1-12 13-15 1-12 19-12 31-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 895.7 899.1 890.8 893.6 892.3 888.5 888.6 888.5 891.2 895.0 895.1 894.0 892.7 MAX. QFE PRESSURE IN HPA 901.6 907.4 896.8 897.5 897.0 892.0 893.0 894.6 900.3 902.6 900.4 899.0 907.4 DAY 22 8 8 20 1 6 10 19 23 24 22 18 MIN. QFE PRESSURE IN HPA 888.0 888.7 879.0 889.0 885.0 883.5 883.5 881.8 885.5 887.2 890.0 888.6 879.0 DAY 3 23 29 15 7 10 5 1 13 2 19 13 MEAN QNH PRESSURE IN HPA 1022.8 1026.6 1017.4 1020.5 1019.0 1014.8 1014.9 1014.9 1017.8 1022.1 1022.2 1021.0 1019.5 MAX. QNH PRESSURE IN HPA 1029.4 1035.9 1024.1 1024.9 1024.3 1018.7 1019.9 1021.6 1028.0 1030.5 1028.1 1026.5 1035.9 DAY 22 8 8 20 1 6 10 19 23 24 22 18 MIN. QNH PRESSURE IN HPA 1014.3 1015.1 1004.3 1015.4 1010.9 1009.3 1009.3 1007.4 1011.5 1013.4 1016.5 1015.0 1004.3 DAY 3 23 29 15 7 10 5 1 13 2 19 13 MEAN QFF PRESSURE IN HPA 1032.7 1037.4 1018.5 1017.5 1014.3 1007.0 1005.7 1006.3 1011.7 1018.6 1022.0 1023.8 1017.9 MAX. QFF PRESSURE IN HPA 1041.1 1051.5 1029.1 1024.0 1022.0 1012.6 1011.0 1015.5 1025.9 1031.2 1032.3 1030.2 1051.5 DAY 27 8 1 2 1 13 11 19 23 24 22 19 MIN. QFF PRESSURE IN HPA 1019.1 1022.0 1004.3 1011.1 1005.1 1000.0 999.1 997.2 1003.9 1007.6 1014.2 1015.1 997.2 DAY 3 23 28 29 31 30 5 1 13 2 30 13 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 896.4 899.8 891.5 893.9 892.2 888.3 888.3 888.7 891.7 895.8 895.9 894.7 893.1 MAX. QFE PRESSURE IN HPA 902.6 908.3 898.0 898.0 896.6 892.0 892.4 895.2 901.0 903.1 901.0 900.4 908.3 DAY 22 8 7 20 20 6 19 19 22 24 22 18 MIN. QFE PRESSURE IN HPA 888.0 890.4 879.6 889.2 885.0 883.0 882.5 881.2 886.0 888.0 890.4 890.0 879.6 DAY 17 23 29 15 7 10 5 1 13 2 30 13 MEAN QNH PRESSURE IN HPA 1023.7 1027.4 1018.2 1020.9 1019.0 1014.6 1014.7 1015.1 1018.4 1023.0 1023.1 1021.8 1020.0 MAX. QNH PRESSURE IN HPA 1030.5 1036.9 1025.4 1025.4 1023.9 1018.7 1019.2 1022.3 1028.8 1031.1 1028.8 1028.1 1036.9 DAY 22 8 7 20 20 6 19 19 22 24 22 18 MIN. QNH PRESSURE IN HPA 1014.3 1017.0 1004.9 1015.6 1010.9 1008.7 1008.2 1006.7 1012.1 1014.3 1017.0 1016.5 1004.9 DAY 17 23 29 15 7 10 5 1 13 2 30 13 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 895.4 898.9 890.4 892.1 890.3 886.4 886.3 886.8 889.6 893.9 894.4 893.3 891.5 MAX. QFE PRESSURE IN HPA 901.2 906.5 898.0 895.8 894.8 890.0 890.1 893.0 899.5 901.0 899.0 900.0 906.5 DAY 22 8 7 9 20 6 10 19 22 24 8 18 MIN. QFE PRESSURE IN HPA 887.5 890.0 877.5 887.2 883.0 881.3 880.0 879.4 884.0 886.5 889.4 888.8 877.5 DAY 17 23 29 15 7 10 5 1 13 2 18 8 MEAN QNH PRESSURE IN HPA 1022.5 1026.4 1016.9 1018.8 1016.8 1012.5 1012.4 1012.9 1016.1 1020.8 1021.5 1020.2 1018.1 MAX. QNH PRESSURE IN HPA 1029.0 1034.9 1025.4 1023.0 1021.9 1016.5 1016.6 1019.9 1027.1 1028.8 1026.5 1027.6 1034.9 DAY 22 8 7 9 20 6 10 19 22 24 8 18 MIN. QNH PRESSURE IN HPA 1013.7 1016.5 1002.6 1013.4 1008.7 1006.8 1005.4 1004.7 1009.8 1012.6 1015.8 1015.2 1002.6 DAY 17 23 29 15 7 10 5 1 13 2 18 8 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 894.2 897.6 888.9 890.2 888.5 884.4 884.1 884.4 887.3 892.0 893.0 892.0 889.7 MAX. QFE PRESSURE IN HPA 899.9 905.0 896.7 894.0 892.4 888.8 888.2 891.6 897.6 898.8 897.7 898.8 905.0 DAY 30 8 7 10 13 6 10 18 22 23 8 18 MIN. QFE PRESSURE IN HPA 886.6 889.8 877.5 885.8 883.0 878.4 877.0 877.0 881.1 884.8 888.2 887.5 877.0 DAY 1 13 28 13 31 16 5 1 13 1 19 31 MEAN QNH PRESSURE IN HPA 1021.2 1024.9 1015.3 1016.7 1014.8 1010.2 1009.9 1010.3 1013.5 1018.7 1019.9 1018.7 1016.2 MAX. QNH PRESSURE IN HPA 1027.5 1033.2 1024.0 1021.0 1019.2 1015.2 1014.5 1018.3 1025.0 1026.3 1025.1 1026.3 1033.2 DAY 30 8 7 10 13 6 10 18 22 23 8 18 MIN. QNH PRESSURE IN HPA 1012.7 1016.3 1002.6 1011.8 1008.7 1003.6 1002.0 1002.0 1006.6 1010.7 1014.5 1013.7 1002.0 DAY 1 13 28 13 31 16 5 1 13 1 19 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 894.7 897.8 889.1 890.1 888.1 883.8 883.7 884.4 887.0 892.5 893.5 892.6 889.8 MAX. QFE PRESSURE IN HPA 901.0 905.0 896.0 894.8 892.6 889.0 888.5 891.6 897.6 900.0 897.9 899.0 905.0 DAY 30 5 7 10 20 6 10 18 22 23 8 18 MIN. QFE PRESSURE IN HPA 887.0 890.0 879.0 885.8 882.5 878.0 876.8 877.8 880.6 884.8 888.2 887.8 876.8 DAY 2 13 28 17 6 9 5 1 13 1 19 4 MEAN QNH PRESSURE IN HPA 1021.8 1025.2 1015.5 1016.6 1014.4 1009.6 1009.5 1010.3 1013.2 1019.3 1020.4 1019.4 1016.3 MAX. QNH PRESSURE IN HPA 1028.8 1033.2 1023.2 1021.9 1019.4 1015.4 1014.8 1018.3 1025.0 1027.6 1025.3 1026.5 1033.2 DAY 30 5 7 10 20 6 10 18 22 23 8 18 MIN. QNH PRESSURE IN HPA 1013.2 1016.5 1004.3 1011.8 1008.2 1003.1 1001.8 1002.9 1006.0 1010.7 1014.5 1014.1 1001.8 DAY 2 13 28 17 6 9 5 1 13 1 19 4 MEAN QFF PRESSURE IN HPA 1031.7 1035.8 1016.5 1013.5 1009.6 1001.7 1000.2 1001.7 1007.1 1015.8 1020.0 1022.1 1014.6 MAX. QFF PRESSURE IN HPA 1040.9 1048.5 1025.0 1019.0 1015.5 1009.1 1006.7 1012.1 1021.9 1027.3 1028.4 1030.0 1048.5 DAY 27 5 7 10 13 6 10 18 22 23 22 18 MIN. QFF PRESSURE IN HPA 1018.9 1022.9 1003.7 1007.4 1001.5 993.9 991.8 993.3 998.7 1005.7 1014.2 1015.6 991.8 DAY 2 13 27 17 30 16 5 1 13 1 15 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.7 -0.8 6.9 12.3 19.5 27.2 29.2 27.3 25.3 16.0 11.0 1.9 14.2 MINIMUN AIR TEMPERATURE (C) -9.9 -4.9 -0.0 4.8 9.5 15.8 19.8 17.9 14.4 7.5 2.4 -4.0 6.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 15 2 0 0 0 0 17 DAYS WITH MINIMUM TEMP. <=-4 25 14 6 0 0 0 0 0 0 0 0 11 56 DAYS WITH FREEZING MIN.<= 0 29 27 15 3 0 0 0 0 0 0 12 21 107 TEMPERATURE RECORDS LOWEST(C) -18.6 -14.7 -8.0 -2.8 4.3 13.4 12.6 14.2 10.6 2.0 -3.0 -20.6 -20.6 DAY 13 1 18 3 4 18 1 30 29 16 19 29 MAXIMUM AIR TEMPERATURE (C) -1.7 3.2 12.6 18.2 25.3 33.4 35.3 34.0 32.7 22.3 17.7 6.8 20.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 4 26 28 27 27 0 0 0 112 DAYS WITH MAXIMUM TEMP. <= 0 23 4 0 0 0 0 0 0 0 0 0 8 35 TEMPERATURE RECORDS HIGHEST(C) 7.6 11.0 18.7 29.4 31.4 37.3 41.5 40.6 36.4 28.4 24.8 20.4 41.5 DAY 3 28 31 27 31 3 27 4 13 10 9 5 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 8.1 12.6 13.4 15.8 17.6 15.5 16.1 18.3 14.8 15.3 10.8 13.9 MEAN DAILY TEMP. (MDT) (C) -5.8 -0.8 6.3 11.5 17.4 24.6 27.6 26.0 23.6 14.9 10.0 1.4 13.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 2.0 108.1 203.7 153.7 77.0 0.0 0.0 0.0 544.6 HEATING DEG. DAYS(BASE 18 0C) 738.1 527.2 362.9 199.7 47.2 0.0 0.0 0.0 0.0 102.1 238.8 513.6 2729.6 DEWPOINT (MEAN C) -9.5 -6.0 -3.1 2.5 3.6 11.4 10.2 9.3 4.2 4.1 -0.0 -4.1 1.9 MIXING RATIO (G/KG) 2.26 2.80 3.61 5.32 5.96 10.06 9.06 8.44 6.14 5.90 4.38 3.55 5.62 VAPOUR PRESSURE (HPA) 3.24 4.00 5.16 7.54 8.44 14.09 12.72 11.88 8.68 8.41 6.25 5.07 7.96 SATURATION DEF. (HPA) 1.04 1.98 5.44 8.01 15.56 23.79 29.79 26.19 25.53 10.93 7.85 2.99 13.26 RELATIVE HUMIDITY (MEAN %) 76 70 54 57 41 41 34 36 30 50 50 68 51 RELATIVE HUMIDITY (MAX. %) 88 85 81 83 65 58 51 57 49 73 73 84 71 RELATIVE HUMIDITY (MIN. %) 61 56 34 39 25 29 22 21 16 33 32 51 35 RELATIVE HUMIDITY (MEAN% 03UTC) 86 84 80 81 64 58 51 57 48 72 73 83 70 RELATIVE HUMIDITY (MEAN% 09UTC) 67 61 46 49 33 36 28 30 27 43 41 59 43 RELATIVE HUMIDITY (MEAN% 15UTC) 77 68 41 44 32 33 26 26 19 45 45 68 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 51.4 40.6 40.4 69.3 14.6 3.2 0.0 0.0 0.0 17.9 13.0 39.0 289.4 DAYS WITH PRECIPITATION >=10 1 1 1 3 0 0 0 0 0 0 1 2 9 DAYS WITH PRECIPITATION >= 5 5 2 3 4 1 0 0 0 0 1 1 3 20 DAYS WITH PRECIPITATION >= 1 7 8 8 9 5 1 0 0 0 5 2 5 50 DAYS WITH PRECIPITATION 15 11 10 16 9 2 0 0 0 7 2 6 78 GREATEST DAILY PRECIPITATION 11.0 11.0 14.0 29.0 5.8 3.0 0.0 0.0 0.0 8.0 11.0 15.0 29.0 DAY 2 2 11 2 13 27 ** ** ** 14 12 22 DAY WITH THUNDER STORM 0 0 1 5 2 1 0 0 0 2 0 0 11 DAYS WITH SNOW OR SLEET 14 9 3 2 0 0 0 0 0 0 0 3 31 DAYS WITH DUST 0 0 0 0 0 1 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 45 45 45 270 45 90 90 90 90 45 270 45 45 PREVAILING WIND SPEED(KNOTS) 7.7 9.4 11.8 8.8 7.1 8.8 11.3 9.0 7.6 8.9 7.1 5.8 9.4 PREVAILING WIND PERCENT 5.8 3.6 14.2 14.0 12.9 13.3 34.2 34.2 13.3 10.3 6.7 7.1 10.7 CALMS PERCENT OF WIND 89.0 87.1 70.3 61.3 58.1 56.7 38.1 37.4 68.7 74.8 86.7 82.6 67.4 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 30 21 38 288 333 72 71 70 62 48 283 340 55 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.5 1.5 1.5 0.5 0.6 6.4 5.4 1.6 0.8 0.6 0.4 1.3 WIND STEADINESES (MEAN %) 100.0 62.5 55.6 46.9 14.3 18.8 90.1 94.7 72.7 44.4 60.0 36.4 48.1 WIND SPEED (MEAN KNOTS) 0.6 0.8 2.7 3.2 3.5 3.2 7.1 5.7 2.2 1.8 1.0 1.1 2.7 FASTEST WIND DIRECTION 40 30 50 250 240 80 280 60 70 360 290 230 240 FASTEST WIND SPEED (KNOTS) 17 19 29 31 39 19 35 21 17 23 17 19 39 DAY 5 19 16 19 2 30 27 25 15 1 11 5 DAYS WITH SKY CLEAR (0-2)/8 8 7 12 6 22 28 26 30 30 20 17 13 219 DAYS WITH P.CLOUDY (3-6)/8 9 9 12 14 5 2 3 1 0 7 11 8 81 DAYS WITH CLOUDY (7-8)/8 14 12 7 10 4 0 2 0 0 4 2 10 65 DAYS WITH VISIBILITY =< 2 KM 2 1 1 1 0 0 1 0 0 0 0 1 7 DURATION OF SUNSHINE HOURS 109.4 119.3 198.7 206.3 321.4 368.6 355.5 361.1 325.7 235.6 211.1 146.8 2959.5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 895.6 892.0 894.6 889.1 889.6 886.2 886.2 887.4 889.1 895.0 895.7 895.7 891.4 MAX. QFE PRESSURE IN HPA 905.0 902.4 906.0 897.2 899.0 892.8 892.2 895.1 896.3 906.0 906.0 909.0 909.0 DAY-HOUR 26- 6 8- 6 17- 3 23- 6 16- 6 1- 6 31- 6 29- 3 27- 6 15- 6 23- 6 28- 6 MIN. QFE PRESSURE IN HPA 884.7 879.2 885.1 879.4 879.6 876.1 878.7 879.0 882.7 887.8 884.6 888.0 876.1 DAY-HOUR 23- 3 15-12 31-15 1-15 2- 9 26-15 29-15 7-15 4-15 1-12 9-12 17-12 MEAN QNH PRESSURE IN HPA 1022.8 1018.7 1021.6 1015.5 1016.1 1012.3 1012.3 1013.6 1015.5 1022.0 1022.8 1022.9 1018.0 MAX. QNH PRESSURE IN HPA 1033.2 1030.3 1034.3 1024.5 1026.5 1019.6 1019.0 1022.2 1023.5 1034.3 1034.3 1037.7 1037.7 DAY-HOUR 26- 6 8- 6 17- 3 23- 6 16- 6 1- 6 31- 6 29- 3 27- 6 15- 6 23- 6 28- 6 MIN. QNH PRESSURE IN HPA 1010.6 1004.5 1011.1 1004.7 1004.9 1001.0 1003.9 1004.3 1008.4 1014.1 1010.5 1014.3 1001.0 DAY-HOUR 23- 3 15-12 31-15 1-15 2- 9 26-15 29-15 7-15 4-15 1-12 9-12 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 895.9 892.3 895.5 890.1 891.4 888.5 888.3 889.8 891.1 896.0 896.6 896.4 892.7 MAX. QFE PRESSURE IN HPA 904.6 901.3 906.0 896.0 898.6 892.5 892.0 895.1 895.1 905.0 905.0 908.0 908.0 DAY 27 8 17 23 16 1 9 29 24 16 23 28 MIN. QFE PRESSURE IN HPA 884.7 881.0 889.0 882.0 883.0 880.3 884.0 884.0 885.9 890.0 888.6 889.8 880.3 DAY 23 19 5 2 2 27 27 7 5 1 1 25 MEAN QNH PRESSURE IN HPA 1023.1 1019.1 1022.6 1016.6 1018.1 1014.8 1014.6 1016.3 1017.7 1023.2 1023.8 1023.6 1019.5 MAX. QNH PRESSURE IN HPA 1032.8 1029.1 1034.3 1023.2 1026.1 1019.3 1018.7 1022.2 1022.2 1033.2 1033.2 1036.6 1036.6 DAY 27 8 17 23 16 1 9 29 24 16 23 28 MIN. QNH PRESSURE IN HPA 1010.6 1006.5 1015.4 1007.6 1008.7 1005.7 1009.8 1009.8 1011.9 1016.5 1015.0 1016.3 1005.7 DAY 23 19 5 2 2 27 27 7 5 1 1 25 MEAN QFF PRESSURE IN HPA 1030.8 1024.2 1024.2 1015.3 1013.8 1006.9 1005.8 1008.5 1011.0 1020.7 1023.7 1027.7 1017.7 MAX. QFF PRESSURE IN HPA 1043.4 1036.7 1041.2 1027.2 1023.0 1012.1 1011.7 1015.6 1016.5 1033.6 1034.5 1049.3 1049.3 DAY 27 1 17 3 16 1 31 29 24 16 14 28 MIN. QFF PRESSURE IN HPA 1014.9 1007.3 1014.7 1006.8 1003.5 996.7 999.1 1000.5 1004.2 1010.5 1011.2 1019.5 996.7 DAY 4 19 24 29 2 27 27 7 5 1 1 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 896.7 893.1 896.1 890.7 891.5 888.4 888.2 889.9 891.6 897.1 897.6 897.1 893.2 MAX. QFE PRESSURE IN HPA 905.0 902.4 905.5 897.2 899.0 892.8 892.2 894.9 896.3 906.0 906.0 909.0 909.0 DAY 26 8 17 23 16 1 31 29 27 15 23 28 MIN. QFE PRESSURE IN HPA 886.1 880.5 889.6 883.7 881.8 880.3 884.0 884.6 886.3 891.0 890.0 892.0 880.3 DAY 23 19 24 1 2 27 27 7 5 1 1 22 MEAN QNH PRESSURE IN HPA 1024.0 1019.9 1023.3 1017.3 1018.2 1014.7 1014.6 1016.4 1018.3 1024.4 1025.0 1024.4 1020.0 MAX. QNH PRESSURE IN HPA 1033.2 1030.3 1033.8 1024.5 1026.5 1019.6 1019.0 1022.0 1023.5 1034.3 1034.3 1037.7 1037.7 DAY 26 8 17 23 16 1 31 29 27 15 23 28 MIN. QNH PRESSURE IN HPA 1012.2 1005.9 1016.1 1009.5 1007.4 1005.7 1009.8 1010.5 1012.4 1017.6 1016.5 1018.7 1005.7 DAY 23 19 24 1 2 27 27 7 5 1 1 22 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 895.7 892.3 894.8 889.3 889.7 886.3 886.4 887.6 889.3 895.1 895.7 895.8 891.5 MAX. QFE PRESSURE IN HPA 904.6 901.3 903.0 895.5 897.2 891.0 890.1 893.0 894.0 905.0 903.9 907.0 907.0 DAY 26 8 9 23 16 7 31 29 16 15 23 28 MIN. QFE PRESSURE IN HPA 885.8 882.0 887.1 881.0 879.6 878.5 881.5 882.3 884.5 888.2 887.1 889.3 878.5 DAY 23 15 14 1 2 27 27 7 5 1 9 22 MEAN QNH PRESSURE IN HPA 1022.9 1019.1 1021.9 1015.7 1016.1 1012.4 1012.5 1013.9 1015.8 1022.2 1022.9 1023.0 1018.2 MAX. QNH PRESSURE IN HPA 1032.8 1029.1 1031.0 1022.6 1024.5 1017.6 1016.6 1019.9 1021.0 1033.2 1032.0 1035.4 1035.4 DAY 26 8 9 23 16 7 31 29 16 15 23 28 MIN. QNH PRESSURE IN HPA 1011.8 1007.6 1013.3 1006.5 1004.9 1003.7 1007.0 1007.9 1010.4 1014.5 1013.3 1015.7 1003.7 DAY 23 15 14 1 2 27 27 7 5 1 9 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 894.5 890.9 893.2 887.9 887.9 884.3 884.3 885.1 886.9 893.3 894.0 894.3 889.7 MAX. QFE PRESSURE IN HPA 903.5 899.9 902.4 893.9 894.4 889.0 888.2 890.9 892.0 903.2 901.8 906.0 906.0 DAY 26 8 16 3 16 7 8 29 27 15 23 28 MIN. QFE PRESSURE IN HPA 885.4 879.2 886.6 880.0 881.0 877.8 879.2 879.2 882.9 887.8 884.6 888.0 877.8 DAY 17 15 31 1 2 26 27 7 5 1 9 17 MEAN QNH PRESSURE IN HPA 1021.6 1017.5 1020.1 1014.2 1014.2 1010.1 1010.2 1011.0 1013.0 1020.2 1020.9 1021.3 1016.2 MAX. QNH PRESSURE IN HPA 1031.6 1027.5 1030.3 1020.9 1021.4 1015.4 1014.5 1017.5 1018.7 1031.2 1029.7 1034.3 1034.3 DAY 26 8 16 3 16 7 8 29 27 15 23 28 MIN. QNH PRESSURE IN HPA 1011.4 1004.5 1012.7 1005.4 1006.5 1002.9 1004.5 1004.5 1008.6 1014.1 1010.5 1014.3 1002.9 DAY 17 15 31 1 2 26 27 7 5 1 9 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 MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 895.2 891.2 893.3 887.7 887.7 883.7 883.9 884.7 886.5 893.4 894.6 894.9 889.7 MAX. QFE PRESSURE IN HPA 904.0 899.5 904.8 893.4 893.2 888.0 888.6 891.6 891.4 903.2 902.6 906.7 906.7 DAY 26 7 16 3 15 4 31 29 16 15 22 28 MIN. QFE PRESSURE IN HPA 885.1 880.0 885.1 879.4 881.8 876.1 878.7 879.0 882.7 888.3 886.6 888.3 876.1 DAY 4 15 31 1 12 26 29 7 4 3 9 24 MEAN QNH PRESSURE IN HPA 1022.3 1017.8 1020.2 1014.0 1013.9 1009.5 1009.7 1010.6 1012.6 1020.3 1021.6 1022.0 1016.2 MAX. QNH PRESSURE IN HPA 1032.1 1027.1 1033.0 1020.3 1020.1 1014.3 1015.0 1018.3 1018.1 1031.2 1030.5 1035.1 1035.1 DAY 26 7 16 3 15 4 31 29 16 15 22 28 MIN. QNH PRESSURE IN HPA 1011.1 1005.4 1011.1 1004.7 1007.4 1001.0 1003.9 1004.3 1008.4 1014.6 1012.7 1014.6 1001.0 DAY 4 15 31 1 12 26 29 7 4 3 9 24 MEAN QFF PRESSURE IN HPA 1030.0 1022.7 1021.7 1012.6 1009.5 1001.4 1000.8 1002.6 1005.9 1017.8 1021.5 1026.1 1014.4 MAX. QFF PRESSURE IN HPA 1042.6 1032.2 1039.2 1024.4 1016.9 1007.0 1008.7 1012.3 1012.3 1030.8 1031.8 1048.2 1048.2 DAY 26 7 16 3 15 22 31 29 27 15 14 28 MIN. QFF PRESSURE IN HPA 1013.5 1009.4 1009.7 1004.1 1004.0 991.8 993.5 995.0 1000.3 1010.8 1010.1 1017.4 991.8 DAY 4 15 31 1 12 26 27 7 4 3 9 17 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.0 0.6 6.5 15.0 18.6 25.5 29.4 28.6 23.9 16.8 9.2 -0.0 14.3 MINIMUN AIR TEMPERATURE (C) -7.0 -5.2 1.3 7.3 9.6 15.0 19.2 18.7 13.3 9.3 2.3 -3.0 6.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 7 7 0 0 0 0 14 DAYS WITH MINIMUM TEMP. <=-4 23 17 3 0 0 0 0 0 0 0 1 16 60 DAYS WITH FREEZING MIN.<= 0 31 25 10 0 0 0 0 0 0 0 8 23 97 TEMPERATURE RECORDS LOWEST(C) -16.0 -11.6 -13.6 4.0 5.0 9.4 14.2 15.0 6.8 5.7 -4.0 -9.6 -16.0 DAY 1 13 11 6 25 13 12 27 27 31 28 18 MAXIMUM AIR TEMPERATURE (C) 0.4 5.1 10.6 20.7 23.8 31.4 35.7 35.1 30.8 22.3 14.2 2.5 19.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 20 30 30 17 0 0 0 97 DAYS WITH MAXIMUM TEMP. <= 0 16 1 2 0 0 0 0 0 0 0 0 11 30 TEMPERATURE RECORDS HIGHEST(C) 4.8 12.0 22.6 28.0 29.0 37.2 40.0 41.0 38.2 27.6 20.4 11.8 41.0 DAY 31 27 29 26 9 30 30 4 1 6 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 7.4 10.3 9.3 13.4 14.2 16.4 16.5 16.4 17.5 13.0 11.9 5.5 12.6 MEAN DAILY TEMP. (MDT) (C) -3.3 -0.1 5.9 14.0 16.7 23.2 27.5 26.9 22.1 15.8 8.3 -0.2 13.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 78.0 201.3 184.1 46.7 0.0 0.0 0.0 510.2 HEATING DEG. DAYS(BASE 18 0C) 660.0 505.7 373.8 122.5 51.6 0.0 0.0 0.0 2.3 71.5 292.1 565.5 2645.1 DEWPOINT (MEAN C) -6.4 -7.0 -0.2 3.7 5.0 7.6 8.5 11.1 7.8 6.4 1.6 -4.4 2.8 MIXING RATIO (G/KG) 2.73 2.74 4.40 5.77 6.39 7.55 8.09 9.71 7.71 6.92 4.93 3.34 5.86 VAPOUR PRESSURE (HPA) 3.91 3.91 6.25 8.19 9.02 10.64 11.35 13.60 10.89 9.84 7.03 4.76 8.28 SATURATION DEF. (HPA) 1.12 2.85 4.19 9.91 13.44 23.66 31.69 27.64 20.59 10.01 5.03 1.65 12.65 RELATIVE HUMIDITY (MEAN %) 79 60 67 52 46 35 30 37 39 54 61 74 53 RELATIVE HUMIDITY (MAX. %) 91 80 88 78 71 55 48 55 58 76 81 84 72 RELATIVE HUMIDITY (MIN. %) 65 43 48 34 29 23 19 24 25 37 45 65 38 RELATIVE HUMIDITY (MEAN% 03UTC) 89 79 86 77 70 55 48 55 58 74 80 82 71 RELATIVE HUMIDITY (MEAN% 09UTC) 73 52 57 46 38 29 25 32 35 48 54 69 47 RELATIVE HUMIDITY (MEAN% 15UTC) 77 53 59 41 36 29 24 29 29 47 57 75 46 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 19.1 41.9 87.2 63.0 34.7 1.5 2.0 0.0 0.0 23.5 7.1 79.2 359.2 DAYS WITH PRECIPITATION >=10 0 2 4 2 1 0 0 0 0 1 0 2 12 DAYS WITH PRECIPITATION >= 5 0 3 6 3 2 0 0 0 0 2 0 5 21 DAYS WITH PRECIPITATION >= 1 6 3 14 9 6 0 1 0 0 5 3 9 56 DAYS WITH PRECIPITATION 9 7 16 12 11 5 2 0 0 6 5 13 86 GREATEST DAILY PRECIPITATION 4.0 21.1 20.0 24.0 17.0 0.8 2.0 0.0 0.0 10.0 3.2 37.0 37.0 DAY 14 21 24 4 15 12 18 ** ** 15 5 9 DAY WITH THUNDER STORM 0 0 0 4 7 3 2 0 0 3 1 0 20 DAYS WITH SNOW OR SLEET 7 2 4 0 0 0 0 0 0 0 0 6 19 DAYS WITH DUST 0 0 0 0 2 0 0 0 0 1 0 0 3 WIND DIRECTION (PREVAILING) 225 270 45 270 270 90 90 45 45 45 45 270 45 PREVAILING WIND SPEED(KNOTS) 4.3 6.3 6.6 8.8 10.4 7.6 10.6 9.5 8.7 5.2 5.1 4.0 8.6 PREVAILING WIND PERCENT 4.5 8.6 9.0 9.3 13.5 22.0 31.0 31.6 15.3 8.4 4.7 6.5 11.0 CALMS PERCENT OF WIND 91.0 78.6 75.5 70.0 58.7 46.7 37.4 42.6 62.7 79.4 92.0 80.0 67.8 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 251 320 20 275 296 60 71 67 63 50 60 291 55 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.6 0.6 1.2 1.2 3.2 5.4 5.1 1.8 0.5 0.3 0.3 1.2 WIND STEADINESES (MEAN %) 66.7 46.2 40.0 60.0 36.4 71.1 84.4 96.2 62.1 41.7 75.0 37.5 48.0 WIND SPEED (MEAN KNOTS) 0.3 1.3 1.5 2.0 3.3 4.5 6.4 5.3 2.9 1.2 0.4 0.8 2.5 FASTEST WIND DIRECTION 210 260 270 330 290 40 80 60 60 120 80 240 60 FASTEST WIND SPEED (KNOTS) 8 16 14 19 19 19 19 23 19 16 12 8 23 DAY 25 4 7 6 10 11 1 19 3 2 15 5 DAYS WITH SKY CLEAR (0-2)/8 5 8 4 9 15 25 27 30 30 14 13 4 184 DAYS WITH P.CLOUDY (3-6)/8 10 10 10 13 15 5 4 1 0 12 12 11 103 DAYS WITH CLOUDY (7-8)/8 16 10 17 8 1 0 0 0 0 5 5 16 78 DAYS WITH VISIBILITY =< 2 KM 3 0 3 0 0 0 0 0 0 0 1 0 7 DURATION OF SUNSHINE HOURS 81.1 147.4 126.7 224.2 304.5 345.0 353.8 345.0 320.0 202.9 169.6 69.6 2689.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 895.2 894.6 891.6 891.1 888.2 887.9 884.8 885.5 890.6 894.4 895.5 893.0 891.0 MAX. QFE PRESSURE IN HPA 904.5 905.4 899.8 899.1 897.0 896.0 893.2 892.0 898.8 900.5 903.2 903.1 905.4 DAY-HOUR 13- 6 15- 6 11- 6 29- 3 25- 3 17- 3 11- 6 27- 3 16- 6 13- 6 24- 6 17- 6 MIN. QFE PRESSURE IN HPA 886.0 885.0 878.8 881.2 878.9 877.3 877.3 878.0 881.8 889.0 888.0 882.9 877.3 DAY-HOUR 25-12 4- 3 6-12 9-15 16-15 11-12 13-15 5-15 3-12 25-15 30-12 1-12 MEAN QNH PRESSURE IN HPA 1022.3 1021.6 1018.3 1017.7 1014.5 1014.1 1010.7 1011.5 1017.2 1021.4 1022.6 1019.9 1017.6 MAX. QNH PRESSURE IN HPA 1032.7 1033.7 1027.4 1026.6 1024.3 1023.2 1020.1 1018.7 1026.3 1028.2 1031.2 1031.1 1033.7 DAY-HOUR 13- 6 15- 6 11- 6 29- 3 25- 3 17- 3 11- 6 27- 3 16- 6 13- 6 24- 6 17- 6 MIN. QNH PRESSURE IN HPA 1012.1 1010.9 1004.0 1006.7 1004.1 1002.4 1002.4 1003.1 1007.4 1015.4 1014.3 1008.6 1002.4 DAY-HOUR 25-12 4- 3 6-12 9-15 16-15 11-12 13-15 5-15 3-12 25-15 30-12 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 895.7 895.0 891.9 892.2 889.7 889.7 887.0 887.7 892.5 895.3 896.4 893.3 892.2 MAX. QFE PRESSURE IN HPA 904.0 905.0 898.5 899.1 897.0 896.0 893.0 892.0 898.2 900.0 902.0 902.0 905.0 DAY 13 15 11 29 25 17 11 27 27 13 24 17 MIN. QFE PRESSURE IN HPA 887.3 885.0 881.0 885.0 883.0 881.5 882.9 883.0 885.8 891.2 890.5 885.0 881.0 DAY 25 4 6 5 22 11 7 11 19 15 4 1 MEAN QNH PRESSURE IN HPA 1022.9 1022.1 1018.6 1018.9 1016.1 1016.2 1013.1 1013.9 1019.2 1022.4 1023.6 1020.1 1018.9 MAX. QNH PRESSURE IN HPA 1032.1 1033.2 1026.0 1026.6 1024.3 1023.2 1019.9 1018.7 1025.6 1027.6 1029.9 1029.9 1033.2 DAY 13 15 11 29 25 17 11 27 27 13 24 17 MIN. QNH PRESSURE IN HPA 1013.5 1010.9 1006.5 1010.9 1008.7 1007.0 1008.6 1008.7 1011.8 1017.9 1017.1 1010.9 1006.5 DAY 25 4 6 5 22 11 7 11 19 15 4 1 MEAN QFF PRESSURE IN HPA 1029.3 1026.8 1020.0 1016.5 1012.0 1009.3 1004.4 1005.4 1013.2 1019.3 1024.1 1024.5 1017.1 MAX. QFF PRESSURE IN HPA 1041.9 1040.8 1034.1 1025.4 1022.6 1016.1 1013.8 1012.8 1023.2 1024.6 1032.7 1036.2 1041.9 DAY 1 15 11 14 25 17 12 27 27 13 24 18 MIN. QFF PRESSURE IN HPA 1019.2 1013.8 1007.0 1007.5 1003.2 999.0 998.8 998.7 1004.1 1014.6 1015.3 1010.1 998.7 DAY 25 4 6 9 22 11 7 6 3 10 4 1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 896.3 895.6 892.8 892.6 889.9 889.7 886.8 887.9 893.0 896.3 897.3 894.1 892.7 MAX. QFE PRESSURE IN HPA 904.5 905.4 899.8 899.1 896.8 896.0 893.2 891.9 898.8 900.5 903.2 903.1 905.4 DAY 13 15 11 29 25 17 11 27 16 13 24 17 MIN. QFE PRESSURE IN HPA 888.0 885.0 880.2 885.0 883.0 881.0 882.1 883.6 886.0 893.0 890.5 885.5 880.2 DAY 25 4 6 4 22 11 7 11 19 4 4 1 MEAN QNH PRESSURE IN HPA 1023.5 1022.8 1019.6 1019.5 1016.4 1016.2 1013.0 1014.2 1019.9 1023.6 1024.7 1021.0 1019.5 MAX. QNH PRESSURE IN HPA 1032.7 1033.7 1027.4 1026.6 1024.1 1023.2 1020.1 1018.6 1026.3 1028.2 1031.2 1031.1 1033.7 DAY 13 15 11 29 25 17 11 27 16 13 24 17 MIN. QNH PRESSURE IN HPA 1014.3 1010.9 1005.6 1010.9 1008.7 1006.5 1007.7 1009.4 1012.1 1019.9 1017.1 1011.5 1005.6 DAY 25 4 6 4 22 11 7 11 19 4 4 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 895.3 894.9 892.0 891.4 888.4 888.0 885.0 885.7 890.9 894.8 895.6 893.1 891.3 MAX. QFE PRESSURE IN HPA 903.5 904.5 899.8 897.8 895.0 894.2 892.0 890.0 896.0 899.0 901.8 902.0 904.5 DAY 13 15 11 14 25 17 11 27 15 20 24 17 MIN. QFE PRESSURE IN HPA 887.8 885.0 879.5 884.0 881.9 879.0 880.8 881.8 884.0 891.0 888.3 884.0 879.0 DAY 25 4 6 4 22 11 7 11 3 4 4 1 MEAN QNH PRESSURE IN HPA 1022.5 1022.0 1018.7 1018.1 1014.7 1014.3 1010.9 1011.8 1017.5 1021.8 1022.8 1020.0 1017.9 MAX. QNH PRESSURE IN HPA 1031.6 1032.7 1027.4 1025.2 1022.1 1021.2 1018.7 1016.5 1023.2 1026.5 1029.7 1029.9 1032.7 DAY 13 15 11 14 25 17 11 27 15 20 24 17 MIN. QNH PRESSURE IN HPA 1014.1 1010.9 1004.8 1009.8 1007.5 1004.3 1006.3 1007.4 1009.8 1017.6 1014.6 1009.8 1004.3 DAY 25 4 6 4 22 11 7 11 3 4 4 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 894.2 893.5 890.6 889.6 886.6 886.1 882.8 883.2 888.5 892.7 893.8 892.0 889.5 MAX. QFE PRESSURE IN HPA 902.5 902.2 898.2 895.6 894.3 892.2 890.8 887.2 894.2 897.0 899.2 900.2 902.5 DAY 12 15 11 14 24 17 11 27 26 21 24 17 MIN. QFE PRESSURE IN HPA 886.0 886.0 878.8 881.5 880.2 877.3 878.1 879.5 881.8 889.2 888.0 882.9 877.3 DAY 25 20 6 9 22 11 7 11 3 25 30 1 MEAN QNH PRESSURE IN HPA 1021.2 1020.4 1017.2 1016.1 1012.7 1012.2 1008.5 1009.0 1014.9 1019.5 1020.8 1018.8 1015.9 MAX. QNH PRESSURE IN HPA 1030.4 1030.1 1025.6 1022.7 1021.3 1019.0 1017.4 1013.4 1021.2 1024.3 1026.8 1027.9 1030.4 DAY 12 15 11 14 24 17 11 27 26 21 24 17 MIN. QNH PRESSURE IN HPA 1012.1 1012.1 1004.0 1007.0 1005.6 1002.4 1003.3 1004.8 1007.4 1015.6 1014.3 1008.6 1002.4 DAY 25 20 6 9 22 11 7 11 3 25 30 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 894.6 893.9 890.7 889.5 886.4 885.8 882.5 883.0 888.4 892.8 894.3 892.6 889.5 MAX. QFE PRESSURE IN HPA 903.0 902.0 898.0 895.0 895.0 893.0 891.0 887.2 895.2 897.0 899.2 901.0 903.0 DAY 12 14 11 13 24 17 11 27 26 21 24 17 MIN. QFE PRESSURE IN HPA 887.0 886.0 879.0 881.2 878.9 877.8 877.3 878.0 882.5 889.0 888.0 883.2 877.3 DAY 24 20 6 9 16 10 13 5 3 25 30 1 MEAN QNH PRESSURE IN HPA 1021.6 1020.8 1017.3 1016.0 1012.5 1011.8 1008.1 1008.7 1014.7 1019.6 1021.2 1019.5 1016.0 MAX. QNH PRESSURE IN HPA 1031.0 1029.9 1025.4 1022.1 1022.1 1019.9 1017.6 1013.4 1022.3 1024.3 1026.8 1028.8 1031.0 DAY 12 14 11 13 24 17 11 27 26 21 24 17 MIN. QNH PRESSURE IN HPA 1013.2 1012.1 1004.3 1006.7 1004.1 1002.9 1002.4 1003.1 1008.2 1015.4 1014.3 1008.9 1002.4 DAY 24 20 6 9 16 10 13 5 3 25 30 1 MEAN QFF PRESSURE IN HPA 1027.8 1025.4 1018.6 1013.5 1008.3 1004.8 999.4 1000.1 1008.6 1016.4 1021.7 1023.9 1014.0 MAX. QFF PRESSURE IN HPA 1038.0 1037.5 1033.8 1022.4 1019.9 1013.5 1011.1 1006.8 1018.6 1021.6 1029.3 1035.3 1038.0 DAY 11 14 11 13 24 17 11 27 26 21 24 17 MIN. QFF PRESSURE IN HPA 1017.2 1013.9 1004.6 1003.1 999.2 994.6 993.4 992.8 999.8 1012.5 1014.1 1008.7 992.8 DAY 23 20 6 9 16 10 27 5 2 9 4 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 MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -7.9 -1.7 4.0 12.7 15.0 23.2 28.5 25.5 22.3 16.7 8.9 2.4 12.5 MINIMUN AIR TEMPERATURE (C) -12.7 -6.2 -2.2 5.3 8.3 13.5 18.8 15.9 12.3 6.7 2.2 -1.4 5.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 5 0 0 0 0 0 5 DAYS WITH MINIMUM TEMP. <=-4 27 19 10 0 0 0 0 0 0 0 3 8 67 DAYS WITH FREEZING MIN.<= 0 31 26 21 0 1 0 0 0 0 0 8 17 104 TEMPERATURE RECORDS LOWEST(C) -21.0 -13.5 -9.0 0.6 -0.4 10.0 12.4 10.0 6.0 2.2 -8.2 -11.0 -21.0 DAY 13 1 1 8 5 5 12 12 30 8 27 29 MAXIMUM AIR TEMPERATURE (C) -4.0 2.3 8.8 18.5 19.5 29.1 35.1 31.7 28.9 24.0 14.3 6.0 17.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 9 28 21 12 0 0 0 70 DAYS WITH MAXIMUM TEMP. <= 0 24 10 0 0 0 0 0 0 0 0 0 2 36 TEMPERATURE RECORDS HIGHEST(C) 4.8 8.4 19.0 26.6 29.8 36.6 40.6 38.6 33.8 29.6 20.6 14.5 40.6 DAY 21 23 30 12 29 30 25 24 3 10 1 16 DIF. BETWEEN (MAX.-MIN.) (C) 8.7 8.5 11.0 13.2 11.2 15.6 16.3 15.8 16.6 17.3 12.1 7.4 12.8 MEAN DAILY TEMP. (MDT) (C) -8.4 -1.9 3.3 11.9 13.9 21.3 26.9 23.8 20.6 15.4 8.2 2.3 11.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.5 33.2 185.0 96.8 22.4 0.0 0.0 0.0 338.0 HEATING DEG. DAYS(BASE 18 0C) 816.9 578.3 455.4 182.7 134.4 0.3 0.0 0.8 11.5 83.7 292.5 486.7 3043.3 DEWPOINT (MEAN C) -12.6 -8.0 -6.3 1.7 7.6 9.6 9.3 7.2 4.4 -0.9 -0.6 -3.5 0.6 MIXING RATIO (G/KG) 1.83 2.48 2.93 4.97 7.63 8.66 8.57 7.39 6.06 4.13 4.36 3.52 5.21 VAPOUR PRESSURE (HPA) 2.61 3.53 4.18 7.06 10.79 12.17 12.03 10.44 8.59 5.88 6.22 5.02 7.38 SATURATION DEF. (HPA) 1.07 2.11 4.58 8.48 7.29 17.71 28.97 23.96 19.99 14.48 5.95 2.51 11.43 RELATIVE HUMIDITY (MEAN %) 71 65 52 52 64 46 33 35 35 34 56 68 51 RELATIVE HUMIDITY (MAX. %) 84 81 78 78 85 72 53 55 57 52 79 85 72 RELATIVE HUMIDITY (MIN. %) 56 49 33 35 49 29 21 23 20 21 36 51 35 RELATIVE HUMIDITY (MEAN% 03UTC) 82 78 76 77 84 72 53 55 57 52 76 84 71 RELATIVE HUMIDITY (MEAN% 09UTC) 63 59 43 44 56 39 28 28 29 27 47 61 44 RELATIVE HUMIDITY (MEAN% 15UTC) 73 58 45 43 60 36 25 29 26 28 50 62 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 62.7 21.1 26.3 47.5 49.3 17.2 0.0 4.0 3.6 0.0 16.2 30.5 278.4 DAYS WITH PRECIPITATION >=10 1 1 0 2 1 0 0 0 0 0 0 1 6 DAYS WITH PRECIPITATION >= 5 5 1 2 3 4 2 0 0 0 0 1 1 19 DAYS WITH PRECIPITATION >= 1 7 4 6 6 12 3 0 2 1 0 5 4 50 DAYS WITH PRECIPITATION 13 10 8 12 19 7 0 2 2 0 6 12 91 GREATEST DAILY PRECIPITATION 30.0 12.0 7.0 24.0 14.0 7.0 0.0 3.0 3.0 0.0 6.0 23.0 30.0 DAY 8 24 16 18 4 10 ** 11 16 ** 8 3 DAY WITH THUNDER STORM 0 0 2 0 7 3 0 1 0 0 0 0 13 DAYS WITH SNOW OR SLEET 13 6 5 0 0 0 0 0 0 0 1 3 28 DAYS WITH DUST 0 0 0 0 0 0 1 0 0 1 1 0 3 WIND DIRECTION (PREVAILING) 360 270 315 270 90 270 45 45 45 270 270 270 45 PREVAILING WIND SPEED(KNOTS) 3.0 6.6 5.5 9.1 6.7 9.9 10.6 9.8 7.9 11.7 9.1 9.0 9.1 PREVAILING WIND PERCENT 3.9 9.0 11.0 11.3 14.2 10.0 34.2 28.4 19.3 11.6 8.7 3.9 11.1 CALMS PERCENT OF WIND 89.7 79.3 60.0 54.0 60.0 62.0 28.4 40.0 64.0 74.2 74.7 84.5 64.2 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 34 279 330 314 49 315 67 62 57 319 278 295 43 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.7 1.0 0.6 0.8 0.6 6.0 4.9 1.8 0.9 0.9 0.3 1.0 WIND STEADINESES (MEAN %) 60.0 63.6 40.0 18.2 26.7 20.7 89.6 89.1 64.3 33.3 50.0 27.3 35.7 WIND SPEED (MEAN KNOTS) 0.5 1.1 2.5 3.3 3.0 2.9 6.7 5.5 2.8 2.7 1.8 1.1 2.8 FASTEST WIND DIRECTION 60 260 60 270 230 270 60 30 60 270 250 70 270 FASTEST WIND SPEED (KNOTS) 14 16 21 23 23 29 23 27 17 33 19 17 33 DAY 3 8 9 22 29 10 11 10 14 26 22 2 DAYS WITH SKY CLEAR (0-2)/8 10 10 13 5 8 19 24 27 27 23 14 4 184 DAYS WITH P.CLOUDY (3-6)/8 11 11 11 16 8 11 7 3 3 8 12 15 116 DAYS WITH CLOUDY (7-8)/8 10 8 7 9 15 0 0 1 0 0 4 12 66 DAYS WITH VISIBILITY =< 2 KM 2 0 1 0 0 0 0 0 0 1 0 1 5 DURATION OF SUNSHINE HOURS 103.2 139.1 177.6 194.6 181.0 313.6 353.7 329.0 298.6 275.3 170.4 106.2 2642.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 894.5 889.8 892.2 889.6 891.6 886.9 885.8 889.8 891.2 892.3 893.1 891.9 890.7 MAX. QFE PRESSURE IN HPA 907.0 900.8 905.1 896.0 898.6 892.8 893.6 898.0 898.8 899.0 903.3 898.8 907.0 DAY-HOUR 10- 6 16- 6 12- 6 8- 3 14- 6 11- 3 7- 6 31- 6 29- 6 29- 6 4- 6 1- 6 MIN. QFE PRESSURE IN HPA 882.3 878.8 878.1 883.9 881.2 880.1 878.2 881.8 883.5 885.7 882.6 885.8 878.1 DAY-HOUR 30-15 24-12 30-15 22-12 9-12 27-15 9-15 18-15 17-12 10-12 22-12 14-12 MEAN QNH PRESSURE IN HPA 1021.5 1016.3 1019.0 1016.1 1018.3 1013.0 1011.9 1016.3 1017.8 1019.0 1020.0 1018.6 1017.3 MAX. QNH PRESSURE IN HPA 1035.4 1028.5 1033.3 1023.2 1026.1 1019.6 1020.5 1025.4 1026.3 1026.5 1031.3 1026.3 1035.4 DAY-HOUR 10- 6 16- 6 12- 6 8- 3 14- 6 11- 3 7- 6 31- 6 29- 6 29- 6 4- 6 1- 6 MIN. QNH PRESSURE IN HPA 1007.9 1004.0 1003.3 1009.7 1006.7 1005.5 1003.4 1007.4 1009.3 1011.7 1008.3 1011.8 1003.3 DAY-HOUR 30-15 24-12 30-15 22-12 9-12 27-15 9-15 18-15 17-12 10-12 22-12 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 894.4 889.8 892.7 890.4 892.3 888.3 887.7 891.3 892.7 893.4 893.6 892.1 891.6 MAX. QFE PRESSURE IN HPA 906.0 900.0 904.2 896.0 898.0 892.8 893.0 897.9 898.0 898.0 902.2 897.8 906.0 DAY 10 16 12 8 2 11 7 31 29 30 4 1 MIN. QFE PRESSURE IN HPA 884.0 882.0 880.6 886.4 884.0 883.2 883.5 886.0 887.1 889.0 882.9 887.3 880.6 DAY 31 21 31 18 9 17 31 1 25 11 25 15 MEAN QNH PRESSURE IN HPA 1021.5 1016.3 1019.5 1017.0 1019.1 1014.6 1014.0 1017.9 1019.5 1020.3 1020.6 1018.8 1018.2 MAX. QNH PRESSURE IN HPA 1034.3 1027.6 1032.3 1023.2 1025.4 1019.6 1019.9 1025.3 1025.4 1025.4 1030.1 1025.2 1034.3 DAY 10 16 12 8 2 11 7 31 29 30 4 1 MIN. QNH PRESSURE IN HPA 1009.8 1007.6 1006.0 1012.5 1009.8 1008.9 1009.3 1012.1 1013.3 1015.4 1008.6 1013.5 1006.0 DAY 31 21 31 18 9 17 31 1 25 11 25 15 MEAN QFF PRESSURE IN HPA 1030.5 1021.7 1022.5 1015.6 1016.6 1008.4 1005.4 1011.0 1014.1 1017.8 1021.0 1022.1 1017.2 MAX. QFF PRESSURE IN HPA 1048.0 1035.0 1038.9 1023.8 1026.5 1014.6 1014.4 1020.5 1023.9 1024.7 1030.6 1030.6 1048.0 DAY 10 16 12 8 2 10 13 31 30 30 18 29 MIN. QFF PRESSURE IN HPA 1015.1 1009.4 1005.1 1010.9 1006.5 1001.5 999.1 1003.9 1008.0 1010.2 1008.0 1013.8 999.1 DAY 3 24 31 22 9 28 31 1 25 11 7 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 895.5 890.8 893.5 891.0 892.6 888.4 888.0 891.7 893.2 894.3 894.6 893.1 892.2 MAX. QFE PRESSURE IN HPA 907.0 900.8 905.1 896.0 898.6 892.8 893.6 898.0 898.8 899.0 903.3 898.8 907.0 DAY 10 16 12 8 14 11 7 31 29 29 4 1 MIN. QFE PRESSURE IN HPA 886.0 882.4 881.6 888.0 883.9 884.0 883.6 886.3 887.8 888.6 884.4 888.4 881.6 DAY 31 24 31 5 9 17 10 1 25 26 25 14 MEAN QNH PRESSURE IN HPA 1022.6 1017.4 1020.4 1017.7 1019.4 1014.7 1014.3 1018.4 1020.1 1021.3 1021.7 1019.9 1019.0 MAX. QNH PRESSURE IN HPA 1035.4 1028.5 1033.3 1023.2 1026.1 1019.6 1020.5 1025.4 1026.3 1026.5 1031.3 1026.3 1035.4 DAY 10 16 12 8 14 11 7 31 29 29 4 1 MIN. QNH PRESSURE IN HPA 1012.1 1008.0 1007.2 1014.3 1009.7 1009.8 1009.4 1012.4 1014.1 1015.0 1010.3 1014.7 1007.2 DAY 31 24 31 5 9 17 10 1 25 26 25 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 894.8 890.2 892.6 889.8 891.8 887.0 886.2 890.1 891.4 892.3 893.2 892.0 890.9 MAX. QFE PRESSURE IN HPA 906.0 900.2 904.0 894.2 898.2 891.1 892.6 896.0 897.0 897.4 901.3 898.0 906.0 DAY 10 16 12 19 2 10 7 31 29 29 4 1 MIN. QFE PRESSURE IN HPA 885.5 881.3 881.0 885.0 882.4 882.8 881.5 884.9 885.8 885.7 883.7 887.3 881.0 DAY 30 24 30 22 9 27 10 1 17 26 22 14 MEAN QNH PRESSURE IN HPA 1021.8 1016.8 1019.4 1016.3 1018.5 1013.2 1012.3 1016.6 1018.0 1019.1 1020.1 1018.7 1017.6 MAX. QNH PRESSURE IN HPA 1034.3 1027.9 1032.1 1021.2 1025.6 1017.7 1019.4 1023.2 1024.3 1024.8 1029.1 1025.4 1034.3 DAY 10 16 12 19 2 10 7 31 29 29 4 1 MIN. QNH PRESSURE IN HPA 1011.5 1006.8 1006.5 1010.9 1008.0 1008.5 1007.0 1010.8 1011.8 1011.7 1009.5 1013.5 1006.5 DAY 30 24 30 22 9 27 10 1 17 26 22 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 893.7 888.9 891.0 888.5 890.7 885.4 883.9 888.1 889.4 890.5 891.8 891.0 889.4 MAX. QFE PRESSURE IN HPA 904.5 898.0 901.7 893.7 897.5 889.7 890.7 894.6 895.5 896.0 899.4 896.3 904.5 DAY 10 16 12 19 2 6 7 30 29 29 17 1 MIN. QFE PRESSURE IN HPA 882.5 878.8 878.2 883.9 881.2 880.9 878.2 882.4 883.5 885.7 882.6 885.8 878.2 DAY 30 24 30 22 9 27 31 18 17 10 22 14 MEAN QNH PRESSURE IN HPA 1020.6 1015.3 1017.7 1014.8 1017.2 1011.4 1009.7 1014.4 1015.9 1017.1 1018.5 1017.6 1015.9 MAX. QNH PRESSURE IN HPA 1032.7 1025.4 1029.5 1020.6 1024.9 1016.2 1017.3 1021.6 1022.6 1023.2 1027.0 1023.5 1032.7 DAY 10 16 12 19 2 6 7 30 29 29 17 1 MIN. QNH PRESSURE IN HPA 1008.2 1004.0 1003.4 1009.7 1006.7 1006.4 1003.4 1008.0 1009.3 1011.7 1008.3 1011.8 1003.4 DAY 30 24 30 22 9 27 31 18 17 10 22 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 MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 894.2 889.3 891.2 888.5 890.7 885.3 883.4 888.0 889.3 890.8 892.4 891.5 889.5 MAX. QFE PRESSURE IN HPA 905.2 898.5 901.0 893.1 897.5 889.8 890.8 894.8 895.9 896.2 899.7 896.7 905.2 DAY 9 15 12 7 2 6 7 11 29 29 17 1 MIN. QFE PRESSURE IN HPA 882.3 881.0 878.1 885.0 885.0 880.1 878.2 881.8 884.0 886.4 882.8 886.5 878.1 DAY 30 24 30 22 9 27 9 18 17 10 24 14 MEAN QNH PRESSURE IN HPA 1021.1 1015.8 1017.9 1014.8 1017.3 1011.2 1009.1 1014.2 1015.7 1017.4 1019.1 1018.2 1016.0 MAX. QNH PRESSURE IN HPA 1033.4 1026.0 1028.8 1020.0 1024.9 1016.3 1017.4 1021.9 1023.1 1023.4 1027.3 1024.0 1033.4 DAY 9 15 12 7 2 6 7 11 29 29 17 1 MIN. QNH PRESSURE IN HPA 1007.9 1006.5 1003.3 1010.9 1010.9 1005.5 1003.4 1007.4 1009.8 1012.5 1008.5 1012.6 1003.3 DAY 30 24 30 22 9 27 9 18 17 10 24 14 MEAN QFF PRESSURE IN HPA 1030.2 1021.1 1020.8 1013.4 1014.6 1005.0 1000.5 1007.3 1010.4 1014.8 1019.6 1021.5 1014.9 MAX. QFF PRESSURE IN HPA 1046.6 1033.0 1034.8 1020.0 1025.9 1011.1 1010.7 1017.4 1021.0 1022.2 1027.3 1028.6 1046.6 DAY 10 16 12 30 2 6 12 11 29 29 17 29 MIN. QFF PRESSURE IN HPA 1014.6 1008.7 1002.2 1007.8 1007.1 997.5 993.8 999.6 1004.0 1008.2 1007.1 1013.4 993.8 DAY 2 24 30 29 31 27 24 18 17 10 22 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 MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.1 0.6 5.9 14.1 17.0 22.5 26.2 25.6 22.5 14.0 2.6 -0.2 12.2 MINIMUN AIR TEMPERATURE (C) -8.4 -4.4 -0.7 5.9 10.2 14.1 18.6 18.1 14.7 7.0 0.1 -1.9 6.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 6 2 0 0 0 0 8 DAYS WITH MINIMUM TEMP. <=-4 21 13 4 0 0 0 0 0 0 0 6 4 48 DAYS WITH FREEZING MIN.<= 0 31 26 20 0 0 0 0 0 0 0 14 27 118 TEMPERATURE RECORDS LOWEST(C) -18.8 -13.7 -6.2 0.6 4.0 9.4 14.3 13.6 10.4 3.0 -11.0 -8.0 -18.8 DAY 22 16 23 23 9 22 23 29 30 7 15 1 MAXIMUM AIR TEMPERATURE (C) 0.2 5.0 11.1 20.0 23.4 30.2 34.3 33.9 31.8 22.3 6.2 1.5 18.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 0 17 30 29 19 1 0 0 97 DAYS WITH MAXIMUM TEMP. <= 0 13 3 0 0 0 0 0 0 0 0 3 7 26 TEMPERATURE RECORDS HIGHEST(C) 8.4 16.0 23.0 31.0 28.8 38.0 39.2 37.7 38.0 31.8 17.0 7.6 39.2 DAY 29 27 31 19 17 28 24 13 7 1 8 28 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 9.4 11.8 14.1 13.2 16.1 15.7 15.8 17.1 15.3 6.1 3.4 12.2 MEAN DAILY TEMP. (MDT) (C) -4.1 0.3 5.2 13.0 16.8 22.1 26.5 26.0 23.2 14.7 3.2 -0.2 12.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.8 56.5 169.0 155.0 77.0 0.9 0.0 0.0 459.3 HEATING DEG. DAYS(BASE 18 0C) 685.9 495.1 397.3 155.5 59.8 1.5 0.0 0.0 0.0 110.3 445.4 564.0 2914.8 DEWPOINT (MEAN C) -8.9 -6.1 -4.5 0.7 6.7 6.8 7.9 7.3 4.2 -0.3 -0.2 -2.0 1.0 MIXING RATIO (G/KG) 2.34 2.82 3.21 4.79 7.15 7.30 7.83 7.55 6.25 4.37 4.42 3.74 5.15 VAPOUR PRESSURE (HPA) 3.34 4.02 4.57 6.78 10.08 10.27 11.01 10.63 8.83 6.24 6.30 5.36 7.29 SATURATION DEF. (HPA) 1.55 2.73 5.42 10.26 10.22 18.70 24.60 23.80 20.16 10.65 1.50 0.70 10.86 RELATIVE HUMIDITY (MEAN %) 71 64 53 47 55 42 35 35 35 42 83 88 54 RELATIVE HUMIDITY (MAX. %) 85 84 77 71 81 66 53 53 55 62 94 95 73 RELATIVE HUMIDITY (MIN. %) 57 46 35 29 32 21 19 18 18 24 68 78 37 RELATIVE HUMIDITY (MEAN% 03UTC) 82 82 76 68 76 65 48 50 50 57 91 92 70 RELATIVE HUMIDITY (MEAN% 09UTC) 63 55 44 37 43 29 27 26 26 34 77 82 45 RELATIVE HUMIDITY (MEAN% 15UTC) 69 57 43 38 43 28 23 24 23 34 81 88 46 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 28.9 29.2 71.9 47.2 50.7 21.8 3.0 5.6 0.0 20.0 115.1 32.6 426.0 DAYS WITH PRECIPITATION >=10 1 1 2 2 1 1 0 0 0 1 3 1 13 DAYS WITH PRECIPITATION >= 5 1 2 4 4 4 1 0 0 0 1 6 2 25 DAYS WITH PRECIPITATION >= 1 6 4 10 6 8 5 1 2 0 3 13 6 64 DAYS WITH PRECIPITATION 15 9 11 12 12 7 1 3 0 4 15 10 99 GREATEST DAILY PRECIPITATION 17.0 11.0 27.0 14.5 16.0 12.0 3.0 3.0 0.0 14.0 37.0 14.4 37.0 DAY 8 2 8 26 3 1 12 28 ** 28 1 8 DAY WITH THUNDER STORM 0 0 0 2 7 6 4 1 0 0 1 0 21 DAYS WITH SNOW OR SLEET 11 6 4 0 0 0 0 0 0 0 11 8 40 DAYS WITH DUST 0 0 0 2 1 0 1 0 1 0 0 0 5 WIND DIRECTION (PREVAILING) 45 90 270 270 270 45 45 45 45 45 45 360 45 PREVAILING WIND SPEED(KNOTS) 9.8 9.4 12.4 13.2 9.4 9.0 10.2 8.8 10.5 9.1 8.8 5.1 9.4 PREVAILING WIND PERCENT 6.5 9.3 11.6 16.7 10.9 15.8 31.9 26.2 22.5 14.9 10.0 5.6 13.8 CALMS PERCENT OF WIND 88.4 67.1 66.5 52.0 66.0 57.9 25.8 24.6 40.0 62.9 75.8 80.6 57.5 NO. OF WIND OBSERVATION 155 140 155 150 238 240 248 248 240 248 240 248 2550 VECTOR WIND DIRECTION (MEAN) 62 34 310 269 304 51 68 66 56 51 62 351 49 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.2 1.6 2.5 0.8 1.8 6.4 4.7 3.5 1.7 1.2 0.3 1.5 WIND STEADINESES (MEAN %) 80.0 40.0 47.1 49.0 27.6 48.6 85.3 74.6 66.0 68.0 75.0 33.3 41.7 WIND SPEED (MEAN KNOTS) 1.0 3.0 3.4 5.1 2.9 3.7 7.5 6.3 5.3 2.5 1.6 0.9 3.6 FASTEST WIND DIRECTION 60 50 280 240 180 40 40 80 30 60 60 330 240 FASTEST WIND SPEED (KNOTS) 16 23 23 33 23 23 29 29 29 21 29 14 33 DAY 5 15 9 19 2 11 30 28 7 2 13 21 DAYS WITH SKY CLEAR (0-2)/8 9 10 13 2 7 23 26 23 29 24 2 1 169 DAYS WITH P.CLOUDY (3-6)/8 13 8 9 15 13 6 5 8 1 5 8 2 93 DAYS WITH CLOUDY (7-8)/8 9 10 9 13 11 1 0 0 0 2 20 28 103 DAYS WITH VISIBILITY =< 2 KM 1 3 2 1 0 0 0 0 0 0 2 9 18 DURATION OF SUNSHINE HOURS 118.7 154.2 196.2 170.2 232.6 335.5 366.8 324.0 318.2 270.6 56.5 14.4 2557.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 893.7 892.0 890.2 888.0 888.7 886.4 886.4 887.6 888.7 895.8 894.4 896.9 890.7 MAX. QFE PRESSURE IN HPA 903.0 900.3 899.4 895.5 897.1 898.9 893.1 892.9 896.6 902.9 902.8 904.6 904.6 DAY-HOUR 6- 6 9- 6 23- 6 1- 6 9- 3 22- 6 27- 6 24- 6 22- 6 20- 6 21- 6 26- 6 MIN. QFE PRESSURE IN HPA 879.5 883.4 879.4 880.1 882.5 879.6 879.4 879.7 881.0 886.7 879.6 888.3 879.4 DAY-HOUR 8-12 3- 3 21-15 20- 9 31-12 3-15 1-15 13-15 7-15 1-12 11- 0 5- 0 MEAN QNH PRESSURE IN HPA 1020.6 1018.7 1016.8 1014.3 1015.1 1012.5 1012.5 1013.9 1015.1 1023.0 1021.5 1024.2 1017.3 MAX. QNH PRESSURE IN HPA 1031.0 1028.0 1027.0 1022.6 1024.4 1026.4 1020.0 1019.7 1023.9 1030.9 1030.8 1032.8 1032.8 DAY-HOUR 6- 6 9- 6 23- 6 1- 6 9- 3 22- 6 27- 6 24- 6 22- 6 20- 6 21- 6 26- 6 MIN. QNH PRESSURE IN HPA 1004.8 1009.2 1004.7 1005.5 1008.2 1004.9 1004.7 1005.0 1006.5 1012.8 1004.9 1014.6 1004.7 DAY-HOUR 8-12 3- 3 21-15 20- 9 31-12 3-15 1-15 13-15 7-15 1-12 11- 0 5- 0 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1010.6 1005.5 1003.9 1005.6 1008.1 1020.2 1024.0 1028.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1023.7 1022.3 1011.9 1013.6 1020.1 1028.3 1037.4 1037.5 ****** DAY-HOUR **-** **-** **-** **-** 9- 3 22- 3 27- 6 29- 3 22- 6 20- 6 30- 6 26- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1001.5 997.1 995.1 996.2 997.3 1006.0 1002.7 1018.1 ****** DAY-HOUR **-** **-** **-** **-** 31-12 27-15 1-15 13-15 7-12 1-12 11- 0 5- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 889.0 886.9 887.1 888.3 889.4 896.1 894.1 896.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 896.6 897.5 891.5 891.6 895.0 902.2 902.2 903.3 ****** DAY ** ** ** ** 9 22 27 24 23 20 21 27 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 883.6 882.4 883.1 883.0 885.2 888.9 879.6 888.3 ****** DAY ** ** ** ** 13 3 1 13 29 28 11 5 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1015.4 1013.1 1013.3 1014.6 1015.9 1023.4 1021.1 1024.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1023.9 1024.9 1018.2 1018.3 1022.1 1030.1 1030.1 1031.3 ****** DAY ** ** ** ** 9 22 27 24 23 20 21 27 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1009.4 1008.0 1008.8 1008.7 1011.2 1015.3 1004.9 1014.6 ****** DAY ** ** ** ** 13 3 1 13 29 28 11 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1010.7 1006.0 1004.4 1005.9 1008.3 1019.8 1023.2 1028.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1022.4 1020.5 1009.0 1011.3 1017.2 1025.7 1034.8 1036.0 ****** DAY ** ** ** ** 9 22 5 29 23 20 30 27 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.1 1000.9 999.5 999.1 1002.7 1009.2 1002.7 1018.1 ****** DAY ** ** ** ** 31 27 1 14 13 2 11 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 893.9 892.3 890.9 889.1 889.5 887.8 888.0 889.2 890.2 896.8 894.5 896.8 891.6 MAX. QFE PRESSURE IN HPA 901.9 899.1 898.3 895.1 897.1 898.5 892.8 892.8 896.1 902.2 902.2 903.0 903.0 DAY 6 9 23 1 9 22 27 24 22 20 21 26 MIN. QFE PRESSURE IN HPA 879.7 883.4 881.5 882.4 884.3 882.0 884.1 884.0 885.8 888.4 881.0 888.4 879.7 DAY 8 3 8 11 6 3 1 13 3 28 11 5 MEAN QNH PRESSURE IN HPA 1020.8 1019.1 1017.5 1015.5 1016.0 1014.0 1014.3 1015.6 1016.7 1024.1 1021.5 1024.1 1018.3 MAX. QNH PRESSURE IN HPA 1029.8 1026.6 1025.8 1022.2 1024.4 1026.0 1019.6 1019.6 1023.3 1030.1 1030.1 1031.0 1031.0 DAY 6 9 23 1 9 22 27 24 22 20 21 26 MIN. QNH PRESSURE IN HPA 1005.0 1009.2 1007.0 1008.0 1010.2 1007.6 1009.9 1009.8 1011.8 1014.7 1006.5 1014.7 1005.0 DAY 8 3 8 11 6 3 1 13 3 28 11 5 MEAN QFF PRESSURE IN HPA 1027.7 1023.6 1019.4 1013.5 1012.0 1007.4 1005.9 1007.7 1010.3 1021.9 1024.3 1028.5 1016.8 MAX. QFF PRESSURE IN HPA 1038.8 1034.1 1030.9 1019.8 1023.7 1022.3 1011.1 1013.6 1019.3 1028.0 1036.5 1035.7 1038.8 DAY 19 16 23 1 9 22 20 29 22 20 30 26 MIN. QFF PRESSURE IN HPA 1008.7 1012.7 1007.7 1003.0 1004.4 1001.4 1000.2 1001.1 1004.2 1010.9 1005.7 1018.7 1000.2 DAY 8 3 8 20 31 3 25 10 3 28 11 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 894.7 893.3 891.7 889.5 889.7 887.8 888.0 889.5 890.8 897.8 895.5 897.8 892.2 MAX. QFE PRESSURE IN HPA 903.0 900.3 899.4 895.5 896.8 898.9 893.1 892.9 896.6 902.9 902.8 904.6 904.6 DAY 6 9 23 1 9 22 27 24 22 20 21 26 MIN. QFE PRESSURE IN HPA 880.5 885.3 882.9 882.5 884.8 881.6 883.8 884.3 886.1 888.6 884.4 889.1 880.5 DAY 8 3 8 20 6 3 1 12 3 28 10 5 MEAN QNH PRESSURE IN HPA 1021.8 1020.1 1018.4 1016.0 1016.2 1014.1 1014.3 1015.9 1017.4 1025.2 1022.6 1025.2 1018.9 MAX. QNH PRESSURE IN HPA 1031.0 1028.0 1027.0 1022.6 1024.1 1026.4 1020.0 1019.7 1023.9 1030.9 1030.8 1032.8 1032.8 DAY 6 9 23 1 9 22 27 24 22 20 21 26 MIN. QNH PRESSURE IN HPA 1005.9 1011.3 1008.6 1008.2 1010.7 1007.2 1009.6 1010.2 1012.2 1015.0 1010.3 1015.5 1005.9 DAY 8 3 8 20 6 3 1 12 3 28 10 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1011.8 1007.2 1005.8 1007.9 1010.8 1022.7 1025.4 1029.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1022.7 1022.1 1011.9 1012.8 1020.1 1028.3 1037.4 1037.5 ****** DAY ** ** ** ** 9 22 27 24 22 20 30 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.3 1000.8 1000.0 1000.9 1004.3 1011.3 1009.1 1019.5 ****** DAY ** ** ** ** 31 3 1 10 7 1 10 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 893.9 892.4 890.6 888.1 888.5 886.5 886.4 887.8 888.8 896.1 894.6 897.0 890.9 MAX. QFE PRESSURE IN HPA 902.7 900.1 898.2 892.8 895.3 897.1 891.5 891.1 894.8 900.7 901.7 904.1 904.1 DAY 6 9 23 1 9 22 27 24 22 17 21 26 MIN. QFE PRESSURE IN HPA 880.3 885.3 880.5 880.1 884.0 880.7 882.2 882.7 883.7 888.0 882.4 888.8 880.1 DAY 8 21 3 20 2 3 1 10 7 28 10 5 MEAN QNH PRESSURE IN HPA 1020.9 1019.2 1017.2 1014.4 1014.9 1012.6 1012.4 1014.0 1015.2 1023.3 1021.7 1024.3 1017.5 MAX. QNH PRESSURE IN HPA 1030.7 1027.8 1025.6 1019.6 1022.4 1024.4 1018.2 1017.7 1021.9 1028.4 1029.5 1032.2 1032.2 DAY 6 9 23 1 9 22 27 24 22 17 21 26 MIN. QNH PRESSURE IN HPA 1005.7 1011.3 1005.9 1005.5 1009.8 1006.1 1007.8 1008.4 1009.5 1014.3 1008.0 1015.2 1005.5 DAY 8 21 3 20 2 3 1 10 7 28 10 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1010.0 1005.5 1003.6 1005.4 1007.9 1020.0 1024.2 1028.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1020.7 1019.0 1009.4 1010.5 1017.2 1025.4 1035.3 1036.9 ****** DAY ** ** ** ** 9 22 27 24 22 7 30 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1003.3 1000.2 998.0 998.4 1000.5 1008.0 1006.2 1018.9 ****** DAY ** ** ** ** 31 28 24 10 7 1 10 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 892.7 890.8 888.9 886.8 887.6 885.0 884.4 885.6 886.5 894.1 893.7 896.2 889.4 MAX. QFE PRESSURE IN HPA 901.4 899.1 895.6 891.2 894.8 895.3 889.3 889.8 892.2 898.8 900.9 903.2 903.2 DAY 6 9 23 17 8 22 27 28 15 17 21 26 MIN. QFE PRESSURE IN HPA 879.5 885.2 879.6 880.5 882.5 880.2 879.4 880.6 881.1 886.7 881.1 889.0 879.4 DAY 8 2 3 22 31 3 11 10 7 1 10 4 MEAN QNH PRESSURE IN HPA 1019.5 1017.5 1015.3 1012.9 1013.8 1010.9 1010.3 1011.6 1012.6 1021.1 1020.7 1023.4 1015.8 MAX. QNH PRESSURE IN HPA 1029.2 1026.6 1022.7 1017.9 1021.9 1022.4 1015.7 1016.3 1019.0 1026.3 1028.7 1031.2 1031.2 DAY 6 9 23 17 8 22 27 28 15 17 21 26 MIN. QNH PRESSURE IN HPA 1004.8 1011.2 1004.9 1005.9 1008.2 1005.6 1004.7 1006.0 1006.6 1012.8 1006.6 1015.4 1004.7 DAY 8 2 3 22 31 3 11 10 7 1 10 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1009.3 1003.8 1001.5 1002.9 1005.1 1017.6 1022.9 1027.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1019.8 1017.1 1006.7 1007.8 1013.6 1023.1 1033.5 1035.8 ****** DAY ** ** ** ** 8 22 27 28 22 7 30 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1001.5 997.6 995.9 996.4 997.3 1006.0 1004.6 1018.6 ****** DAY ** ** ** ** 31 27 1 10 7 1 10 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 893.2 891.2 889.0 886.7 887.6 884.6 884.1 885.4 886.4 894.3 894.0 896.6 889.4 MAX. QFE PRESSURE IN HPA 901.3 899.3 895.4 891.4 894.9 894.5 888.5 891.5 892.9 898.9 901.2 903.9 903.9 DAY 6 9 23 17 8 22 27 28 22 17 21 26 MIN. QFE PRESSURE IN HPA 880.1 885.0 879.4 880.9 883.8 879.6 879.4 879.7 881.0 886.9 880.8 889.4 879.4 DAY 8 2 21 22 6 3 1 13 7 1 10 4 MEAN QNH PRESSURE IN HPA 1020.1 1017.8 1015.4 1012.8 1013.8 1010.5 1010.0 1011.4 1012.5 1021.3 1021.0 1023.9 1015.9 MAX. QNH PRESSURE IN HPA 1029.1 1026.9 1022.5 1018.1 1022.0 1021.5 1014.8 1018.2 1019.7 1026.4 1029.0 1032.0 1032.0 DAY 6 9 23 17 8 22 27 28 22 17 21 26 MIN. QNH PRESSURE IN HPA 1005.5 1010.9 1004.7 1006.4 1009.6 1004.9 1004.7 1005.0 1006.5 1013.1 1006.3 1015.8 1004.7 DAY 8 2 21 22 6 3 1 13 7 1 10 4 MEAN QFF PRESSURE IN HPA 1026.9 1022.2 1017.3 1010.7 1009.8 1003.8 1001.6 1003.5 1006.2 1019.1 1023.8 1028.1 1014.4 MAX. QFF PRESSURE IN HPA 1039.0 1032.9 1026.6 1015.1 1020.1 1016.4 1006.2 1011.5 1016.0 1024.1 1033.7 1036.7 1039.0 DAY 19 16 23 23 8 22 27 28 22 19 30 26 MIN. QFF PRESSURE IN HPA 1009.2 1014.6 1006.1 1002.7 1004.3 997.1 995.1 996.2 997.9 1007.5 1004.2 1019.6 995.1 DAY 8 28 21 20 17 27 1 13 7 1 10 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 888.9 886.1 886.2 887.5 888.4 895.6 894.5 897.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 896.7 895.8 890.8 892.5 894.8 900.9 901.7 903.9 ****** DAY ** ** ** ** 8 21 27 28 22 19 20 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 885.0 881.9 881.9 881.7 884.5 889.0 880.9 890.3 ****** DAY ** ** ** ** 12 3 2 12 7 1 10 4 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1015.3 1012.1 1012.3 1013.7 1014.7 1022.7 1021.5 1024.4 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1024.0 1023.0 1017.4 1019.3 1021.9 1028.7 1029.5 1032.0 ****** DAY ** ** ** ** 8 21 27 28 22 19 20 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1010.9 1007.5 1007.5 1007.3 1010.4 1015.4 1006.4 1016.8 ****** DAY ** ** ** ** 12 3 2 12 7 1 10 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1010.8 1005.2 1003.9 1005.6 1008.2 1020.3 1024.4 1028.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1022.1 1018.7 1009.0 1012.0 1017.8 1026.3 1035.5 1036.7 ****** DAY ** ** ** ** 8 21 27 28 22 19 29 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.6 999.0 997.1 998.2 1001.8 1009.5 1004.3 1020.7 ****** DAY ** ** ** ** 16 30 24 13 1 1 10 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 889.2 886.6 887.1 888.2 889.2 896.1 894.7 897.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 896.8 896.9 891.3 892.8 895.2 901.9 902.2 903.6 ****** DAY ** ** ** ** 8 21 26 28 15 19 20 26 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 884.4 883.1 882.7 882.6 885.2 889.1 880.4 889.1 ****** DAY ** ** ** ** 12 30 24 12 12 1 10 4 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1015.6 1012.8 1013.3 1014.5 1015.6 1023.3 1021.7 1024.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1024.1 1024.2 1018.0 1019.6 1022.3 1029.8 1030.1 1031.7 ****** DAY ** ** ** ** 8 21 26 28 15 19 20 26 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1010.3 1008.8 1008.4 1008.3 1011.2 1015.5 1005.8 1015.5 ****** DAY ** ** ** ** 12 30 24 12 12 1 10 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1010.6 1005.5 1004.5 1005.9 1008.4 1020.0 1024.1 1028.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1022.3 1019.4 1009.1 1012.4 1017.3 1026.2 1034.6 1036.4 ****** DAY ** ** ** ** 8 21 4 28 22 19 29 26 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.0 999.6 997.6 999.1 1002.5 1008.7 1003.2 1019.1 ****** DAY ** ** ** ** 30 30 24 12 1 1 10 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.1 1.0 7.7 14.2 17.6 22.3 25.3 25.6 20.4 14.8 7.7 0.7 13.2 MINIMUN AIR TEMPERATURE (C) -2.2 -3.5 2.2 7.5 10.1 14.5 17.8 18.3 12.4 8.6 3.2 -2.9 7.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 1 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 9 11 0 0 0 0 0 0 0 0 0 13 33 DAYS WITH FREEZING MIN.<= 0 23 24 6 0 0 0 0 0 0 0 3 23 79 TEMPERATURE RECORDS LOWEST(C) -8.8 -10.4 -3.0 1.4 5.0 9.8 12.2 15.8 7.2 3.2 -0.8 -11.6 -11.6 DAY 24 20 2 5 7 30 2 8 16 13 10 7 MAXIMUM AIR TEMPERATURE (C) 4.9 6.6 14.1 21.5 25.0 30.5 33.7 34.0 28.8 21.9 13.4 5.7 20.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 6 19 29 31 8 0 0 0 93 DAYS WITH MAXIMUM TEMP. <= 0 2 1 0 0 0 0 0 0 0 0 0 2 5 TEMPERATURE RECORDS HIGHEST(C) 12.0 15.2 22.0 29.4 31.2 36.6 38.2 37.2 34.5 27.5 22.0 14.0 38.2 DAY 3 27 29 21 29 10 30 18 12 14 1 3 DIF. BETWEEN (MAX.-MIN.) (C) 7.1 10.1 11.9 14.0 14.9 16.0 15.9 15.7 16.4 13.3 10.2 8.6 12.8 MEAN DAILY TEMP. (MDT) (C) 1.3 1.6 8.1 14.5 17.6 22.5 25.7 26.2 20.6 15.3 8.3 1.4 13.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.3 8.3 66.4 145.9 160.0 18.9 0.0 0.0 0.0 399.9 HEATING DEG. DAYS(BASE 18 0C) 516.4 460.4 306.1 111.5 50.5 4.7 0.0 0.0 0.2 86.2 290.5 513.7 2340.2 DEWPOINT (MEAN C) -2.5 -5.3 0.2 4.0 6.1 6.3 9.4 9.8 2.3 4.0 2.1 -6.6 2.5 MIXING RATIO (G/KG) 3.67 3.04 4.48 5.96 6.82 6.92 8.52 8.79 5.45 6.05 5.13 2.84 5.64 VAPOUR PRESSURE (HPA) 5.23 4.33 6.36 8.44 9.63 9.74 11.94 12.33 7.74 8.60 7.29 4.05 7.97 SATURATION DEF. (HPA) 1.58 2.54 4.68 8.67 11.70 18.86 21.70 21.83 17.46 8.89 3.62 2.69 10.35 RELATIVE HUMIDITY (MEAN %) 78 66 63 55 51 39 39 40 35 54 71 61 54 RELATIVE HUMIDITY (MAX. %) 90 85 87 79 74 59 56 60 55 74 88 78 74 RELATIVE HUMIDITY (MIN. %) 62 45 41 34 29 22 22 20 18 34 50 42 35 RELATIVE HUMIDITY (MEAN% 03UTC) 89 78 86 76 73 57 55 59 52 71 85 73 71 RELATIVE HUMIDITY (MEAN% 09UTC) 72 57 51 44 38 29 29 30 25 44 61 51 44 RELATIVE HUMIDITY (MEAN% 15UTC) 76 54 49 43 36 27 27 26 25 43 63 52 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 52.2 24.3 53.8 34.4 21.8 0.6 0.0 0.0 2.3 16.8 93.0 6.9 306.1 DAYS WITH PRECIPITATION >=10 2 1 3 1 0 0 0 0 0 0 3 0 10 DAYS WITH PRECIPITATION >= 5 5 1 3 3 2 0 0 0 0 2 5 0 21 DAYS WITH PRECIPITATION >= 1 8 5 8 8 5 0 0 0 1 3 7 2 47 DAYS WITH PRECIPITATION 12 11 14 14 10 3 0 1 6 7 10 8 96 GREATEST DAILY PRECIPITATION 12.0 11.0 13.5 11.0 7.0 0.4 0.0 0.0 1.0 8.6 32.0 3.2 32.0 DAY 2 28 12 30 6 3 ** ** 29 15 5 29 DAY WITH THUNDER STORM 0 0 1 9 10 2 0 1 4 1 2 0 30 DAYS WITH SNOW OR SLEET 5 9 1 0 0 0 0 0 0 0 2 3 20 DAYS WITH DUST 0 0 0 1 2 2 1 0 0 0 0 0 6 WIND DIRECTION (PREVAILING) 225 45 90 45 270 45 90 45 45 45 45 270 45 PREVAILING WIND SPEED(KNOTS) 4.0 8.1 6.3 5.8 10.0 10.3 12.1 8.8 9.0 8.4 8.5 9.1 8.7 PREVAILING WIND PERCENT 4.0 9.4 10.5 7.1 10.1 26.7 38.7 34.7 18.8 9.7 6.3 11.3 14.3 CALMS PERCENT OF WIND 81.3 55.8 58.9 62.9 57.3 35.4 21.8 24.2 58.8 68.5 76.7 72.6 55.5 NO. OF WIND OBSERVATION 176 224 248 240 248 240 248 248 240 248 240 248 2848 VECTOR WIND DIRECTION (MEAN) 278 341 52 347 338 60 69 69 64 57 354 269 58 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.9 0.7 0.2 0.8 4.6 7.3 6.4 2.9 1.0 0.3 1.3 1.8 WIND STEADINESES (MEAN %) 30.0 29.0 23.3 8.3 26.7 73.0 92.4 91.4 82.9 47.6 17.6 65.0 50.0 WIND SPEED (MEAN KNOTS) 1.0 3.1 3.0 2.4 3.0 6.3 7.9 7.0 3.5 2.1 1.7 2.0 3.6 FASTEST WIND DIRECTION 310 260 240 230 280 280 70 90 80 300 60 210 280 FASTEST WIND SPEED (KNOTS) 16 17 17 21 29 25 25 21 19 21 19 27 29 DAY 17 1 5 1 2 16 12 6 2 19 6 3 DAYS WITH SKY CLEAR (0-2)/8 9 9 7 13 16 22 28 30 23 18 12 11 198 DAYS WITH P.CLOUDY (3-6)/8 10 8 14 9 10 7 3 1 6 9 9 11 97 DAYS WITH CLOUDY (7-8)/8 12 11 10 8 5 1 0 0 1 4 9 9 70 DAYS WITH VISIBILITY =< 2 KM 5 2 0 0 0 0 0 0 0 0 1 1 9 DURATION OF SUNSHINE HOURS 94.6 157.8 178.4 224.7 299.2 339.9 381.8 368.8 294.0 236.4 177.5 146.6 2899.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 892.9 890.3 889.5 890.0 888.8 885.1 883.7 885.0 893.1 894.9 891.4 893.5 889.8 MAX. QFE PRESSURE IN HPA 903.7 903.2 897.9 901.4 896.9 890.0 889.4 891.7 900.0 902.2 900.6 903.9 903.9 DAY-HOUR 9- 6 19- 6 1- 6 5- 6 18- 6 8- 3 2- 3 15- 6 23- 6 11- 6 2- 6 7- 6 MIN. QFE PRESSURE IN HPA 879.9 876.2 877.4 877.8 880.2 878.8 875.2 876.1 885.1 886.7 882.0 874.8 874.8 DAY-HOUR 31-21 1- 0 7- 6 1-15 1-12 15-15 30-15 1-15 7-15 14-12 25-21 3-12 MEAN QNH PRESSURE IN HPA 1019.8 1016.9 1016.0 1016.5 1015.2 1011.1 1009.4 1010.9 1019.9 1021.9 1018.1 1020.4 1016.3 MAX. QNH PRESSURE IN HPA 1031.8 1031.2 1025.3 1029.2 1024.2 1016.5 1015.8 1018.4 1027.6 1030.1 1028.3 1032.0 1032.0 DAY-HOUR 9- 6 19- 6 1- 6 5- 6 18- 6 8- 3 2- 3 15- 6 23- 6 11- 6 2- 6 7- 6 MIN. QNH PRESSURE IN HPA 1005.3 1001.1 1002.5 1002.9 1005.6 1004.0 1000.0 1001.0 1011.1 1012.8 1007.6 999.6 999.6 DAY-HOUR 31-21 1- 0 7- 6 1-15 1-12 15-15 30-15 1-15 7-15 14-12 25-21 3-12 MEAN QFF PRESSURE IN HPA ****** 1020.2 1015.9 1013.3 1010.4 1004.2 1001.2 1002.4 1014.1 1018.6 1018.0 1024.0 ****** MAX. QFF PRESSURE IN HPA ****** 1038.2 1028.8 1029.4 1020.9 1010.8 1009.6 1010.6 1022.8 1027.2 1028.8 1040.3 ****** DAY-HOUR **-** 19- 6 1- 6 5- 6 18- 6 5- 6 2- 3 8- 3 23- 6 23- 6 10- 6 7- 6 MIN. QFF PRESSURE IN HPA ****** 1002.0 1000.1 1000.4 1001.3 995.0 990.1 991.7 1004.5 1006.9 1007.1 998.9 ****** DAY-HOUR **-** 1- 0 7- 6 1-15 1-12 15-12 30-15 1-15 2-12 14-12 26-12 3-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** 890.0 889.6 890.3 889.2 885.8 884.8 885.8 893.4 895.0 891.5 893.5 ****** MAX. QFE PRESSURE IN HPA ****** 901.9 896.2 899.7 895.5 888.8 889.0 890.5 898.0 900.4 898.2 902.0 ****** DAY ** 19 1 5 18 9 10 15 23 11 2 7 MIN. QFE PRESSURE IN HPA ****** 876.2 878.2 882.9 881.8 881.8 880.0 880.6 887.9 888.9 882.0 877.7 ****** DAY ** 1 12 2 1 3 20 1 8 15 26 4 MEAN QNH PRESSURE IN HPA ****** 1016.5 1016.1 1016.9 1015.6 1011.8 1010.7 1011.8 1020.3 1022.0 1018.2 1020.4 ****** MAX. QNH PRESSURE IN HPA ****** 1029.8 1023.4 1027.3 1022.6 1015.2 1015.4 1017.1 1025.4 1028.1 1025.6 1029.9 ****** DAY ** 19 1 5 18 9 10 15 23 11 2 7 MIN. QNH PRESSURE IN HPA ****** 1001.1 1003.4 1008.6 1007.4 1007.4 1005.4 1006.0 1014.2 1015.3 1007.6 1002.8 ****** DAY ** 1 12 2 1 3 20 1 8 15 26 4 MEAN QFF PRESSURE IN HPA ****** 1019.4 1015.8 1013.4 1010.7 1004.7 1002.1 1002.8 1014.0 1018.3 1017.6 1023.5 ****** MAX. QFF PRESSURE IN HPA ****** 1035.7 1026.8 1027.2 1019.1 1009.1 1008.4 1008.9 1019.6 1024.6 1026.1 1037.5 ****** DAY ** 19 1 5 18 29 2 8 23 11 10 7 MIN. QFF PRESSURE IN HPA ****** 1002.0 1002.7 1005.2 1003.7 998.6 995.3 996.8 1006.8 1009.0 1008.0 1002.5 ****** DAY ** 1 7 23 1 17 30 1 8 15 26 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 893.2 890.1 890.2 890.9 889.8 886.5 885.5 886.7 894.2 895.6 891.8 893.6 890.7 MAX. QFE PRESSURE IN HPA 902.1 902.2 896.8 900.1 896.4 890.0 889.4 891.5 899.4 901.2 899.4 902.7 902.7 DAY 10 19 1 5 18 8 2 15 23 11 2 7 MIN. QFE PRESSURE IN HPA 881.2 877.5 878.8 882.7 882.9 882.3 880.8 881.6 888.9 890.3 882.3 877.9 877.5 DAY 16 1 12 2 1 3 30 1 8 14 26 4 MEAN QNH PRESSURE IN HPA 1020.1 1016.7 1016.7 1017.5 1016.3 1012.6 1011.5 1012.8 1021.2 1022.7 1018.5 1020.5 1017.3 MAX. QNH PRESSURE IN HPA 1030.0 1030.1 1024.1 1027.8 1023.6 1016.5 1015.8 1018.2 1027.0 1029.0 1027.0 1030.7 1030.7 DAY 10 19 1 5 18 8 2 15 23 11 2 7 MIN. QNH PRESSURE IN HPA 1006.7 1002.6 1004.0 1008.4 1008.6 1007.9 1006.3 1007.2 1015.3 1016.8 1007.9 1003.0 1002.6 DAY 16 1 12 2 1 3 30 1 8 14 26 4 MEAN QFF PRESSURE IN HPA 1023.8 1020.2 1017.1 1014.7 1012.0 1006.0 1003.4 1004.6 1016.0 1019.9 1018.8 1024.5 1015.1 MAX. QFF PRESSURE IN HPA 1034.2 1037.2 1027.9 1028.4 1020.5 1010.5 1009.6 1010.6 1021.8 1026.7 1027.7 1039.5 1039.5 DAY 9 19 1 5 18 5 2 8 23 9 10 7 MIN. QFF PRESSURE IN HPA 1009.7 1003.4 1002.7 1005.8 1005.1 999.9 996.5 998.0 1008.5 1011.7 1008.4 1004.7 996.5 DAY 16 1 7 2 1 3 30 2 8 15 23 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 894.4 891.1 891.1 891.6 890.0 886.5 885.4 886.8 894.9 896.5 892.9 894.7 891.3 MAX. QFE PRESSURE IN HPA 903.7 903.2 897.9 901.4 896.9 890.0 889.2 891.7 900.0 902.2 900.6 903.9 903.9 DAY 9 19 1 5 18 8 2 15 23 11 2 7 MIN. QFE PRESSURE IN HPA 882.0 879.4 877.4 883.1 882.8 882.2 880.4 881.8 890.1 890.8 883.5 879.0 877.4 DAY 16 1 7 2 1 16 30 2 1 14 26 4 MEAN QNH PRESSURE IN HPA 1021.4 1017.8 1017.7 1018.3 1016.5 1012.7 1011.4 1013.0 1021.9 1023.8 1019.7 1021.7 1018.0 MAX. QNH PRESSURE IN HPA 1031.8 1031.2 1025.3 1029.2 1024.2 1016.5 1015.6 1018.4 1027.6 1030.1 1028.3 1032.0 1032.0 DAY 9 19 1 5 18 8 2 15 23 11 2 7 MIN. QNH PRESSURE IN HPA 1007.6 1004.7 1002.5 1008.8 1008.5 1007.8 1005.8 1007.4 1016.6 1017.4 1009.3 1004.3 1002.5 DAY 16 1 7 2 1 16 30 2 1 14 26 4 MEAN QFF PRESSURE IN HPA ****** 1021.5 1018.1 1015.3 1011.9 1005.9 1003.5 1004.8 1016.4 1020.7 1020.0 1025.7 ****** MAX. QFF PRESSURE IN HPA ****** 1038.2 1028.8 1029.4 1020.9 1010.8 1009.0 1010.1 1022.8 1027.2 1028.8 1040.3 ****** DAY ** 19 1 5 18 5 2 8 23 23 10 7 MIN. QFF PRESSURE IN HPA ****** 1005.6 1000.1 1006.5 1004.6 999.2 996.2 998.8 1010.1 1013.0 1009.7 1006.1 ****** DAY ** 1 7 30 1 16 30 2 1 14 26 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 893.6 890.6 890.1 890.4 888.7 885.0 883.5 885.0 893.3 895.1 891.7 893.6 890.1 MAX. QFE PRESSURE IN HPA 903.5 902.7 897.1 899.3 895.6 888.9 887.5 889.5 898.8 900.6 898.7 902.7 903.5 DAY 9 18 1 5 18 8 13 15 23 11 2 7 MIN. QFE PRESSURE IN HPA 881.5 879.8 879.1 883.6 881.2 879.9 878.5 879.8 888.0 888.4 882.4 877.9 877.9 DAY 16 1 7 2 1 16 30 1 2 14 26 3 MEAN QNH PRESSURE IN HPA 1020.5 1017.2 1016.6 1016.9 1015.1 1011.0 1009.3 1010.9 1020.2 1022.2 1018.4 1020.6 1016.6 MAX. QNH PRESSURE IN HPA 1031.6 1030.7 1024.4 1026.9 1022.7 1015.3 1013.7 1016.0 1026.3 1028.3 1026.2 1030.7 1031.6 DAY 9 18 1 5 18 8 13 15 23 11 2 7 MIN. QNH PRESSURE IN HPA 1007.0 1005.1 1004.4 1009.4 1006.7 1005.3 1003.7 1005.1 1014.3 1014.7 1008.0 1003.0 1003.0 DAY 16 1 7 2 1 16 30 1 2 14 26 3 MEAN QFF PRESSURE IN HPA ****** 1020.3 1016.3 1013.5 1009.9 1003.8 1000.8 1002.3 1014.0 1018.4 1018.0 1023.9 ****** MAX. QFF PRESSURE IN HPA ****** 1036.6 1027.0 1026.4 1019.0 1008.5 1006.3 1007.9 1020.5 1025.5 1026.1 1038.1 ****** DAY ** 19 1 5 18 29 2 8 23 23 10 7 MIN. QFF PRESSURE IN HPA ****** 1005.6 1003.3 1005.4 1002.1 995.9 993.5 996.4 1007.3 1008.6 1007.3 1002.6 ****** DAY ** 1 7 22 1 16 30 1 2 14 26 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 892.3 889.4 888.2 888.7 887.3 883.3 881.3 882.7 891.4 893.5 890.2 892.5 888.4 MAX. QFE PRESSURE IN HPA 901.9 901.7 895.7 896.9 893.6 887.0 885.6 887.6 896.8 898.7 896.3 901.0 901.9 DAY 9 18 1 5 18 8 13 15 23 11 2 7 MIN. QFE PRESSURE IN HPA 881.1 880.0 878.4 880.5 880.2 879.0 875.8 877.0 885.6 886.7 882.2 874.8 874.8 DAY 16 1 7 30 1 15 30 1 7 14 26 3 MEAN QNH PRESSURE IN HPA 1019.1 1015.9 1014.5 1015.1 1013.5 1009.1 1006.9 1008.3 1018.0 1020.4 1016.8 1019.2 1014.7 MAX. QNH PRESSURE IN HPA 1029.8 1029.5 1022.9 1024.2 1020.5 1013.2 1011.6 1013.8 1024.1 1026.2 1023.5 1028.8 1029.8 DAY 9 18 1 5 18 8 13 15 23 11 2 7 MIN. QNH PRESSURE IN HPA 1006.6 1005.4 1003.6 1005.9 1005.6 1004.3 1000.7 1002.0 1011.6 1012.8 1007.8 999.6 999.6 DAY 16 1 7 30 1 15 30 1 7 14 26 3 MEAN QFF PRESSURE IN HPA ****** 1018.7 1014.1 1011.6 1008.6 1002.0 998.2 999.5 1011.7 1016.7 1016.2 1022.4 ****** MAX. QFF PRESSURE IN HPA ****** 1034.5 1025.1 1023.4 1016.6 1007.7 1004.8 1004.9 1018.2 1023.3 1024.5 1036.2 ****** DAY ** 18 1 5 18 28 1 6 23 23 9 7 MIN. QFF PRESSURE IN HPA ****** 1005.7 1002.8 1002.0 1001.3 995.0 990.2 992.9 1004.5 1006.9 1007.1 998.9 ****** DAY ** 1 7 30 1 15 30 10 2 14 26 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 892.5 889.8 888.2 888.4 887.2 883.2 881.1 882.3 891.3 893.6 890.6 893.1 888.4 MAX. QFE PRESSURE IN HPA 902.3 901.8 895.2 896.3 893.0 887.3 885.3 887.4 896.3 898.4 896.5 901.2 902.3 DAY 9 18 1 4 17 23 1 15 23 23 9 7 MIN. QFE PRESSURE IN HPA 882.6 881.6 879.7 877.8 880.5 878.8 875.2 876.1 885.1 887.3 883.0 875.5 875.2 DAY 16 11 7 1 1 15 30 1 7 14 30 3 MEAN QNH PRESSURE IN HPA 1019.3 1016.3 1014.5 1014.7 1013.4 1008.9 1006.6 1008.0 1017.9 1020.6 1017.2 1019.9 1014.8 MAX. QNH PRESSURE IN HPA 1030.2 1029.7 1022.3 1023.5 1019.9 1013.5 1011.3 1013.6 1023.5 1025.9 1023.8 1029.0 1030.2 DAY 9 18 1 4 17 23 1 15 23 23 9 7 MIN. QNH PRESSURE IN HPA 1008.3 1007.2 1005.0 1002.9 1005.9 1004.0 1000.0 1001.0 1011.1 1013.5 1008.7 1000.4 1000.0 DAY 16 11 7 1 1 15 30 1 7 14 30 3 MEAN QFF PRESSURE IN HPA 1023.0 1019.8 1014.8 1011.9 1009.0 1002.3 998.4 999.8 1012.6 1017.7 1017.5 1023.9 1012.6 MAX. QFF PRESSURE IN HPA 1035.3 1035.1 1025.4 1024.0 1016.4 1009.2 1004.8 1005.9 1018.7 1024.3 1026.0 1037.1 1037.1 DAY 9 18 1 4 17 28 1 7 23 23 9 7 MIN. QFF PRESSURE IN HPA 1010.7 1008.8 1004.8 1000.4 1001.6 995.5 990.1 991.7 1005.2 1008.5 1009.1 1000.9 990.1 DAY 16 1 7 1 12 15 30 1 7 14 30 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** 890.7 889.3 889.5 888.9 885.1 883.5 884.7 892.9 894.8 891.3 893.7 ****** MAX. QFE PRESSURE IN HPA ****** 902.4 895.9 897.1 894.0 889.0 888.4 889.4 897.1 899.6 897.1 901.7 ****** DAY ** 18 1 4 18 23 9 7 23 23 9 21 MIN. QFE PRESSURE IN HPA ****** 882.0 880.6 879.5 882.8 880.3 878.1 878.7 886.7 888.9 882.7 877.3 ****** DAY ** 11 11 1 1 15 30 10 7 14 25 3 MEAN QNH PRESSURE IN HPA ****** 1017.3 1015.8 1016.0 1015.3 1011.0 1009.2 1010.6 1019.7 1021.8 1017.9 1020.7 ****** MAX. QNH PRESSURE IN HPA ****** 1030.3 1023.1 1024.4 1021.0 1015.4 1014.7 1015.8 1024.4 1027.2 1024.4 1029.5 ****** DAY ** 18 1 4 18 23 9 7 23 23 9 21 MIN. QNH PRESSURE IN HPA ****** 1007.6 1006.0 1004.8 1008.5 1005.7 1003.3 1003.9 1012.8 1015.3 1008.4 1002.4 ****** DAY ** 11 11 1 1 15 30 10 7 14 25 3 MEAN QFF PRESSURE IN HPA ****** 1021.1 1016.0 1013.0 1010.6 1004.3 1001.2 1002.5 1014.2 1018.7 1018.2 1024.7 ****** MAX. QFF PRESSURE IN HPA ****** 1036.6 1026.3 1024.1 1017.8 1010.7 1008.0 1009.0 1019.8 1025.6 1026.6 1037.3 ****** DAY ** 18 1 4 17 28 9 7 23 23 9 7 MIN. QFF PRESSURE IN HPA ****** 1010.3 1005.4 1003.1 1004.7 997.7 994.0 995.0 1006.9 1010.0 1008.4 1002.3 ****** DAY ** 11 6 1 1 15 30 10 7 14 25 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** 890.9 889.5 890.1 889.3 885.7 884.4 885.7 893.3 894.9 891.2 893.7 ****** MAX. QFE PRESSURE IN HPA ****** 902.3 895.5 899.1 894.9 888.7 889.3 890.2 897.5 899.7 897.4 901.5 ****** DAY ** 18 1 4 17 20 9 14 22 23 1 21 MIN. QFE PRESSURE IN HPA ****** 881.5 880.1 881.6 883.4 881.1 879.5 880.2 886.8 888.9 882.0 877.5 ****** DAY ** 11 11 1 1 15 19 10 7 14 25 3 MEAN QNH PRESSURE IN HPA ****** 1017.5 1016.0 1016.6 1015.8 1011.8 1010.2 1011.8 1020.2 1022.0 1017.9 1020.7 ****** MAX. QNH PRESSURE IN HPA ****** 1030.2 1022.6 1026.6 1022.0 1015.1 1015.7 1016.7 1024.9 1027.3 1024.8 1029.3 ****** DAY ** 18 1 4 17 20 9 14 22 23 1 21 MIN. QNH PRESSURE IN HPA ****** 1007.0 1005.5 1007.2 1009.2 1006.6 1004.8 1005.6 1012.9 1015.3 1007.6 1002.6 ****** DAY ** 11 11 1 1 15 19 10 7 14 25 3 MEAN QFF PRESSURE IN HPA ****** 1020.6 1015.5 1013.1 1010.6 1004.6 1001.8 1003.2 1014.0 1018.3 1017.5 1024.1 ****** MAX. QFF PRESSURE IN HPA ****** 1036.3 1025.4 1026.2 1018.7 1009.8 1008.6 1009.3 1019.2 1025.0 1025.5 1036.1 ****** DAY ** 18 1 4 17 4 9 31 22 23 9 7 MIN. QFF PRESSURE IN HPA ****** 1009.0 1003.3 1004.1 1004.3 998.0 995.2 996.2 1006.1 1008.7 1007.7 1002.1 ****** DAY ** 11 6 30 31 15 19 10 7 14 25 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.5 4.8 9.8 14.3 20.0 24.2 28.2 29.6 23.5 15.2 8.9 2.2 15.3 MINIMUN AIR TEMPERATURE (C) -1.1 -1.1 2.0 6.9 10.8 14.7 19.5 20.0 14.5 6.6 0.5 -3.9 7.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 7 9 0 0 0 0 16 DAYS WITH MINIMUM TEMP. <=-4 4 3 0 0 0 0 0 0 0 0 7 17 31 DAYS WITH FREEZING MIN.<= 0 20 18 8 0 0 0 0 0 0 0 14 25 85 TEMPERATURE RECORDS LOWEST(C) -6.3 -8.5 -3.0 1.8 4.3 11.2 15.6 17.0 7.4 1.6 -7.0 -10.6 -10.6 DAY 23 26 1 8 9 23 6 20 22 18 28 21 MAXIMUM AIR TEMPERATURE (C) 7.4 10.6 16.0 19.9 25.9 30.1 34.5 36.6 30.6 22.0 16.0 7.8 21.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 4 16 30 31 20 1 0 0 102 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 12.8 16.8 22.2 25.4 31.0 37.8 38.6 41.8 37.0 32.6 24.0 14.4 41.8 DAY 13 22 24 30 22 21 26 5 4 3 8 29 DIF. BETWEEN (MAX.-MIN.) (C) 8.5 11.7 14.0 13.0 15.1 15.4 15.0 16.6 16.1 15.4 15.5 11.7 14.0 MEAN DAILY TEMP. (MDT) (C) 3.1 4.7 9.0 13.4 18.4 22.4 27.0 28.3 22.6 14.3 8.2 2.0 14.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 5.1 55.0 185.5 226.5 84.7 1.0 0.0 0.0 557.9 HEATING DEG. DAYS(BASE 18 0C) 460.4 371.0 279.9 139.0 28.1 0.0 0.0 0.0 12.2 121.9 293.0 496.5 2202.1 DEWPOINT (MEAN C) -2.2 -2.6 -2.1 3.0 5.3 7.3 9.8 8.8 4.6 1.0 -5.2 -7.3 1.7 MIXING RATIO (G/KG) 3.70 3.67 3.86 5.61 6.48 7.52 8.75 8.39 6.26 4.74 3.32 2.56 5.41 VAPOUR PRESSURE (HPA) 5.29 5.23 5.49 7.94 9.17 10.58 12.24 11.77 8.85 6.76 4.73 3.66 7.64 SATURATION DEF. (HPA) 2.23 3.71 7.35 9.11 15.42 21.09 27.61 31.78 22.53 11.59 7.70 3.86 13.66 RELATIVE HUMIDITY (MEAN %) 73 63 49 52 43 39 34 31 36 42 42 52 46 RELATIVE HUMIDITY (MAX. %) 87 81 74 78 69 63 52 51 56 66 61 65 67 RELATIVE HUMIDITY (MIN. %) 55 44 31 33 27 24 22 17 21 26 26 39 30 RELATIVE HUMIDITY (MEAN% 03UTC) 83 79 74 75 68 62 52 51 54 65 60 63 66 RELATIVE HUMIDITY (MEAN% 09UTC) 65 57 41 43 32 31 29 28 30 36 34 46 39 RELATIVE HUMIDITY (MEAN% 15UTC) 65 51 37 42 35 31 27 20 25 33 34 48 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 18.6 11.8 20.0 57.2 27.9 5.8 2.0 0.0 13.0 1.2 4.0 0.1 161.6 DAYS WITH PRECIPITATION >=10 1 0 0 2 0 0 0 0 0 0 0 0 3 DAYS WITH PRECIPITATION >= 5 1 1 2 4 4 1 0 0 1 0 0 0 14 DAYS WITH PRECIPITATION >= 1 3 1 5 8 6 1 1 0 4 1 3 0 33 DAYS WITH PRECIPITATION 9 6 8 13 8 6 2 0 5 2 5 1 65 GREATEST DAILY PRECIPITATION 12.3 9.8 6.0 18.2 7.0 5.0 2.0 0.0 7.0 1.2 1.5 0.1 18.2 DAY 16 5 10 24 13 22 6 ** 21 24 2 13 DAY WITH THUNDER STORM 0 0 0 2 7 7 1 0 2 0 0 0 19 DAYS WITH SNOW OR SLEET 4 1 0 0 0 0 0 0 0 0 0 1 6 DAYS WITH DUST 0 0 0 0 1 1 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 270 45 270 270 90 90 90 90 45 45 270 45 90 PREVAILING WIND SPEED(KNOTS) 5.7 8.6 13.9 11.1 7.6 8.8 10.2 10.6 9.6 10.5 11.2 8.4 9.1 PREVAILING WIND PERCENT 6.0 8.5 7.7 10.0 13.5 18.0 41.9 33.5 12.0 12.9 15.3 10.3 11.7 CALMS PERCENT OF WIND 75.0 70.6 68.4 62.0 51.6 40.7 22.6 36.8 64.0 61.9 66.7 72.9 58.6 NO. OF WIND OBSERVATION 248 153 155 150 155 150 155 155 150 155 150 155 1931 VECTOR WIND DIRECTION (MEAN) 293 25 283 258 102 75 74 78 16 38 245 42 62 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.4 0.9 0.7 0.3 1.1 6.4 4.9 1.2 1.3 2.4 0.7 0.9 WIND STEADINESES (MEAN %) 46.2 16.0 30.0 24.1 7.9 22.9 88.9 81.7 37.5 33.3 72.7 38.9 25.0 WIND SPEED (MEAN KNOTS) 1.3 2.5 3.0 2.9 3.8 4.8 7.2 6.0 3.2 3.9 3.3 1.8 3.6 FASTEST WIND DIRECTION 300 260 280 290 90 210 70 60 290 240 260 50 290 FASTEST WIND SPEED (KNOTS) 17 21 21 23 23 19 21 23 35 27 31 14 35 DAY 13 8 26 14 25 29 4 23 20 3 11 10 DAYS WITH SKY CLEAR (0-2)/8 13 9 17 8 14 20 28 31 23 24 21 17 225 DAYS WITH P.CLOUDY (3-6)/8 9 13 10 11 14 10 3 0 7 5 8 8 98 DAYS WITH CLOUDY (7-8)/8 9 6 4 11 3 0 0 0 0 2 1 6 42 DAYS WITH VISIBILITY =< 2 KM 1 0 0 0 1 0 0 0 0 0 0 0 2 DURATION OF SUNSHINE HOURS 97.4 ****** 241.8 215.3 ****** 218.5 372.4 367.3 290.0 283.8 244.3 176.5 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 893.9 891.5 889.8 888.1 890.4 886.5 882.8 884.7 887.9 893.4 892.2 894.6 889.7 MAX. QFE PRESSURE IN HPA 903.7 899.5 901.1 895.2 896.2 892.0 888.4 891.3 895.6 904.0 901.4 900.9 904.0 DAY-HOUR 7- 6 12- 6 3- 6 7- 6 26- 6 1- 3 4- 3 20- 3 27- 3 25- 6 15- 6 10- 6 MIN. QFE PRESSURE IN HPA 883.5 880.0 879.7 881.0 882.1 875.6 875.9 877.4 879.2 883.7 881.0 888.9 875.6 DAY-HOUR 16-21 5- 0 25- 9 19-12 2-12 29-12 16-15 7-15 4-15 11-12 11- 9 4-12 MEAN QNH PRESSURE IN HPA 1020.9 1018.2 1016.3 1014.4 1017.0 1012.6 1008.4 1010.6 1014.1 1020.3 1019.0 1021.6 1016.1 MAX. QNH PRESSURE IN HPA 1031.8 1027.1 1028.9 1022.3 1023.4 1018.7 1014.7 1018.0 1022.7 1032.1 1029.2 1028.7 1032.1 DAY-HOUR 7- 6 12- 6 3- 6 7- 6 26- 6 1- 3 4- 3 20- 3 27- 3 25- 6 15- 6 10- 6 MIN. QNH PRESSURE IN HPA 1009.3 1005.4 1005.0 1006.5 1007.7 1000.5 1000.8 1002.5 1004.5 1009.5 1006.5 1015.3 1000.5 DAY-HOUR 16-21 5- 0 25- 9 19-12 2-12 29-12 16-15 7-15 4-15 11-12 11- 9 4-12 MEAN QFF PRESSURE IN HPA 1023.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1034.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 7- 6 **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1010.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 11-12 **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 894.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 903.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 7 ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 884.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 17 ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1020.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1031.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 7 ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1010.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 17 ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1023.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 7 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1012.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 12 ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 894.1 892.0 890.6 889.1 891.6 888.0 884.7 886.8 889.1 894.4 893.0 895.2 890.7 MAX. QFE PRESSURE IN HPA 902.9 898.2 900.0 895.1 895.7 892.0 888.4 891.3 895.6 902.7 900.2 900.1 902.9 DAY 7 12 3 7 26 1 4 20 27 25 16 10 MIN. QFE PRESSURE IN HPA 885.5 880.2 881.8 883.0 885.7 879.5 879.2 883.1 882.9 888.0 883.6 891.1 879.2 DAY 17 5 17 19 2 29 16 8 20 11 24 4 MEAN QNH PRESSURE IN HPA 1021.1 1018.7 1017.2 1015.5 1018.3 1014.3 1010.6 1012.9 1015.6 1021.4 1019.9 1022.3 1017.3 MAX. QNH PRESSURE IN HPA 1030.9 1025.6 1027.6 1022.2 1022.9 1018.7 1014.7 1018.0 1022.7 1030.7 1027.9 1027.8 1030.9 DAY 7 12 3 7 26 1 4 20 27 25 16 10 MIN. QNH PRESSURE IN HPA 1011.5 1005.6 1007.4 1008.7 1011.7 1004.8 1004.5 1008.8 1008.6 1014.3 1009.4 1017.7 1004.5 DAY 17 5 17 19 2 29 16 8 20 11 24 4 MEAN QFF PRESSURE IN HPA 1023.9 1020.9 1017.1 1013.3 1013.7 1007.6 1002.0 1003.8 1009.2 1019.2 1020.6 1026.1 1014.8 MAX. QFF PRESSURE IN HPA 1033.5 1028.7 1028.9 1021.6 1019.7 1013.2 1006.5 1011.0 1021.0 1030.7 1030.4 1033.8 1033.8 DAY 7 12 3 7 13 2 8 20 27 25 16 20 MIN. QFF PRESSURE IN HPA 1013.1 1006.4 1003.2 1004.4 1008.0 996.1 994.3 997.8 1001.4 1008.6 1006.6 1021.3 994.3 DAY 12 5 25 19 6 29 16 8 20 4 24 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 895.4 893.0 891.5 889.7 891.9 888.0 884.6 886.9 889.7 895.3 894.0 896.2 891.3 MAX. QFE PRESSURE IN HPA 903.7 899.5 901.1 895.2 896.2 891.8 888.2 891.0 895.6 904.0 901.4 900.9 904.0 DAY 7 12 3 7 26 2 4 20 27 25 15 10 MIN. QFE PRESSURE IN HPA 887.0 881.1 881.5 882.4 885.3 879.0 879.2 883.4 883.7 888.2 884.0 891.8 879.0 DAY 11 5 25 19 2 29 16 8 20 11 11 22 MEAN QNH PRESSURE IN HPA 1022.5 1019.9 1018.2 1016.2 1018.6 1014.2 1010.5 1013.1 1016.1 1022.4 1021.0 1023.4 1018.0 MAX. QNH PRESSURE IN HPA 1031.8 1027.1 1028.9 1022.3 1023.4 1018.5 1014.5 1017.6 1022.7 1032.1 1029.2 1028.7 1032.1 DAY 7 12 3 7 26 2 4 20 27 25 15 10 MIN. QNH PRESSURE IN HPA 1013.2 1006.6 1007.0 1008.0 1011.3 1004.3 1004.5 1009.2 1009.5 1014.5 1009.8 1018.5 1004.3 DAY 11 5 25 19 2 29 16 8 20 11 11 22 MEAN QFF PRESSURE IN HPA 1025.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1034.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 7 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1015.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 11 ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 894.5 892.2 890.2 888.4 890.5 886.5 883.1 885.2 888.1 893.7 892.2 894.9 890.0 MAX. QFE PRESSURE IN HPA 902.6 898.3 898.7 893.4 895.0 890.4 886.8 889.7 894.1 902.6 900.0 899.9 902.6 DAY 7 12 3 7 26 1 23 24 21 25 15 10 MIN. QFE PRESSURE IN HPA 885.5 881.3 879.7 881.7 883.2 876.6 877.9 881.8 881.3 886.3 881.0 890.5 876.6 DAY 11 5 25 19 2 29 16 22 19 11 11 4 MEAN QNH PRESSURE IN HPA 1021.5 1018.9 1016.8 1014.8 1017.1 1012.7 1008.8 1011.1 1014.4 1020.6 1019.0 1022.0 1016.5 MAX. QNH PRESSURE IN HPA 1030.5 1025.8 1026.2 1020.3 1022.1 1017.0 1012.9 1016.2 1021.1 1030.5 1027.6 1027.5 1030.5 DAY 7 12 3 7 26 1 23 24 21 25 15 10 MIN. QNH PRESSURE IN HPA 1011.5 1006.8 1005.0 1007.3 1008.9 1001.6 1003.0 1007.4 1006.8 1012.4 1006.5 1017.1 1001.6 DAY 11 5 25 19 2 29 16 22 19 11 11 4 MEAN QFF PRESSURE IN HPA 1023.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 7 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1012.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 11 ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 892.9 890.5 888.4 886.8 889.1 885.1 880.9 882.8 886.3 891.7 890.7 893.2 888.2 MAX. QFE PRESSURE IN HPA 901.7 896.1 897.2 891.5 892.8 888.8 884.7 887.0 893.5 900.9 898.5 898.2 901.7 DAY 6 1 3 12 26 1 23 24 21 25 15 10 MIN. QFE PRESSURE IN HPA 884.3 881.8 880.4 881.0 882.1 875.6 876.1 879.1 879.6 883.7 885.0 888.9 875.6 DAY 11 5 25 19 2 29 16 7 19 11 8 4 MEAN QNH PRESSURE IN HPA 1019.7 1017.1 1014.7 1012.9 1015.5 1011.0 1006.4 1008.4 1012.4 1018.4 1017.3 1020.1 1014.5 MAX. QNH PRESSURE IN HPA 1029.5 1023.3 1024.5 1018.2 1019.6 1015.2 1010.6 1013.2 1020.4 1028.7 1026.0 1025.6 1029.5 DAY 6 1 3 12 26 1 23 24 21 25 15 10 MIN. QNH PRESSURE IN HPA 1010.2 1007.4 1005.8 1006.5 1007.7 1000.5 1001.0 1004.4 1004.9 1009.5 1010.9 1015.3 1000.5 DAY 11 5 25 19 2 29 16 7 19 11 8 4 MEAN QFF PRESSURE IN HPA 1021.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1032.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1010.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 11 ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 893.1 890.6 888.2 886.7 889.2 884.9 880.5 882.1 886.1 891.8 891.2 893.6 888.2 MAX. QFE PRESSURE IN HPA 902.7 896.0 896.2 891.0 893.5 890.6 884.4 886.5 894.2 900.9 898.9 898.7 902.7 DAY 6 1 3 12 12 1 5 19 21 24 15 9 MIN. QFE PRESSURE IN HPA 885.1 883.5 880.7 881.6 883.0 876.9 875.9 877.4 879.2 884.5 884.9 889.5 875.9 DAY 11 8 25 18 2 29 16 7 4 3 7 25 MEAN QNH PRESSURE IN HPA 1020.0 1017.2 1014.5 1012.8 1015.6 1010.9 1005.9 1007.7 1012.2 1018.6 1017.9 1020.5 1014.5 MAX. QNH PRESSURE IN HPA 1030.7 1023.2 1023.4 1017.6 1020.4 1017.2 1010.3 1012.6 1021.2 1028.7 1026.4 1026.2 1030.7 DAY 6 1 3 12 12 1 5 19 21 24 15 9 MIN. QNH PRESSURE IN HPA 1011.1 1009.3 1006.1 1007.2 1008.7 1001.9 1000.8 1002.5 1004.5 1010.4 1010.8 1016.0 1000.8 DAY 11 8 25 18 2 29 16 7 4 3 7 25 MEAN QFF PRESSURE IN HPA 1022.8 1019.3 1014.4 1010.4 1010.9 1004.2 997.2 998.6 1005.9 1016.3 1018.6 1024.3 1011.9 MAX. QFF PRESSURE IN HPA 1033.6 1025.4 1024.2 1016.3 1018.0 1012.2 1002.8 1004.6 1018.1 1028.2 1028.6 1032.2 1033.6 DAY 6 13 2 6 12 1 5 19 21 17 15 19 MIN. QFF PRESSURE IN HPA 1012.4 1010.1 1003.6 1003.7 1003.7 993.5 991.3 992.2 995.8 1004.6 1009.6 1019.3 991.3 DAY 11 4 25 18 2 29 16 7 4 3 23 16 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 893.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 903.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 884.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1020.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1031.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1010.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1023.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1034.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1014.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 893.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 903.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 883.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1020.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1031.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1009.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1023.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 6 ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1012.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 16 ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.6 3.9 6.2 12.6 20.6 24.9 29.1 29.1 24.9 15.9 7.6 5.9 15.1 MINIMUN AIR TEMPERATURE (C) -3.2 -0.8 1.2 6.1 12.2 14.6 19.7 19.0 15.1 8.4 0.9 0.3 7.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 11 7 0 0 0 0 18 DAYS WITH MINIMUM TEMP. <=-4 14 4 1 0 0 0 0 0 0 0 1 2 22 DAYS WITH FREEZING MIN.<= 0 24 17 11 0 0 0 0 0 0 0 15 15 82 TEMPERATURE RECORDS LOWEST(C) -7.6 -8.6 -5.2 0.4 8.0 10.0 13.2 15.0 10.0 1.0 -4.6 -4.0 -8.6 DAY 27 4 17 4 2 12 15 4 21 29 14 1 MAXIMUM AIR TEMPERATURE (C) 4.3 8.5 10.8 17.7 26.5 31.1 35.2 36.0 31.7 21.9 13.5 11.0 20.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 8 21 31 30 23 0 0 0 113 DAYS WITH MAXIMUM TEMP. <= 0 1 3 0 0 0 0 0 0 0 0 0 0 4 TEMPERATURE RECORDS HIGHEST(C) 13.4 17.4 21.8 25.2 33.2 37.6 40.0 40.6 35.7 28.4 18.7 16.8 40.6 DAY 1 9 30 30 24 29 24 21 7 3 2 27 DIF. BETWEEN (MAX.-MIN.) (C) 7.5 9.3 9.6 11.6 14.3 16.5 15.5 17.0 16.6 13.5 12.6 10.7 12.9 MEAN DAILY TEMP. (MDT) (C) 0.6 3.9 6.0 11.9 19.3 22.8 27.5 27.5 23.4 15.1 7.2 5.6 14.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 10.4 65.1 200.1 201.4 87.4 0.2 0.0 0.0 564.8 HEATING DEG. DAYS(BASE 18 0C) 540.2 410.0 373.0 183.6 10.9 0.4 0.0 0.0 0.8 97.3 324.0 384.1 2324.5 DEWPOINT (MEAN C) -4.9 -3.2 -1.1 2.5 8.0 6.4 9.5 6.1 4.9 2.9 0.6 -0.3 2.6 MIXING RATIO (G/KG) 3.13 3.52 4.15 5.46 7.78 7.03 8.89 7.14 6.36 5.48 4.61 4.25 5.65 VAPOUR PRESSURE (HPA) 4.47 5.01 5.87 7.72 10.98 9.91 12.48 10.05 8.98 7.79 6.60 6.06 7.99 SATURATION DEF. (HPA) 2.17 3.59 4.06 7.53 14.48 23.10 29.64 32.46 24.51 11.32 4.44 3.55 13.40 RELATIVE HUMIDITY (MEAN %) 69 63 64 56 50 34 33 28 32 46 64 67 51 RELATIVE HUMIDITY (MAX. %) 82 81 85 81 78 54 52 46 51 68 85 84 71 RELATIVE HUMIDITY (MIN. %) 54 47 48 37 30 21 21 15 19 29 46 51 35 RELATIVE HUMIDITY (MEAN% 03UTC) 78 80 83 78 78 53 52 46 51 68 84 83 70 RELATIVE HUMIDITY (MEAN% 09UTC) 65 57 58 46 42 28 27 25 28 39 57 59 44 RELATIVE HUMIDITY (MEAN% 15UTC) 68 58 56 49 38 26 26 17 21 40 58 62 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 33.0 20.5 58.9 55.1 34.0 1.0 0.0 0.0 7.0 16.6 19.4 14.3 259.8 DAYS WITH PRECIPITATION >=10 1 0 2 2 1 0 0 0 0 0 0 0 6 DAYS WITH PRECIPITATION >= 5 3 2 6 4 2 0 0 0 1 1 2 2 23 DAYS WITH PRECIPITATION >= 1 8 4 8 6 8 1 0 0 1 3 3 3 45 DAYS WITH PRECIPITATION 11 8 18 12 10 1 0 0 1 5 4 4 74 GREATEST DAILY PRECIPITATION 10.0 8.0 18.0 17.0 15.4 1.0 0.0 0.0 7.0 9.0 9.0 6.0 18.0 DAY 6 29 8 8 12 4 ** ** 22 16 8 11 DAY WITH THUNDER STORM 0 0 0 2 6 1 3 0 0 2 1 0 15 DAYS WITH SNOW OR SLEET 6 4 7 0 0 0 0 0 0 0 1 0 18 DAYS WITH DUST 0 0 0 0 0 0 0 0 2 0 0 0 2 WIND DIRECTION (PREVAILING) 45 45 45 225 45 45 45 90 225 45 45 135 45 PREVAILING WIND SPEED(KNOTS) 12.0 10.3 9.3 13.9 8.8 12.4 11.2 11.4 8.5 8.3 7.2 4.0 10.5 PREVAILING WIND PERCENT 13.5 19.3 16.1 9.3 13.5 28.0 34.2 21.9 9.3 12.3 6.7 4.5 15.1 CALMS PERCENT OF WIND 75.5 59.3 45.8 45.3 51.0 30.7 28.4 40.0 49.3 57.4 82.0 76.1 53.4 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 55 61 54 155 64 60 65 64 274 12 55 265 60 VECTOR WIND MAGNITUDE(KNOTS) 1.6 1.7 1.5 0.3 0.6 3.8 6.8 4.3 0.8 0.4 0.7 0.4 1.7 WIND STEADINESES (MEAN %) 72.7 50.0 36.6 5.9 15.0 50.0 87.2 68.3 20.5 11.8 63.6 30.8 40.5 WIND SPEED (MEAN KNOTS) 2.2 3.4 4.1 5.1 4.0 7.6 7.8 6.3 3.9 3.4 1.1 1.3 4.2 FASTEST WIND DIRECTION 50 250 40 220 250 220 60 110 300 290 40 240 300 FASTEST WIND SPEED (KNOTS) 17 23 23 23 27 29 27 23 39 27 19 16 39 DAY 10 9 14 22 17 4 29 3 3 30 11 24 DAYS WITH SKY CLEAR (0-2)/8 9 6 5 6 11 25 18 29 25 21 21 11 187 DAYS WITH P.CLOUDY (3-6)/8 10 12 12 16 14 5 12 2 5 9 7 16 120 DAYS WITH CLOUDY (7-8)/8 12 11 14 8 6 0 1 0 0 1 2 4 59 DAYS WITH VISIBILITY =< 2 KM 2 1 0 0 0 0 0 0 1 0 0 1 5 DURATION OF SUNSHINE HOURS 116.6 133.3 151.4 206.5 267.9 369.0 345.9 361.7 314.0 256.9 225.2 150.8 2899.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 893.8 890.5 888.1 889.4 889.3 886.7 887.0 886.4 887.0 892.3 896.9 893.8 890.1 MAX. QFE PRESSURE IN HPA 902.9 897.8 893.6 899.3 894.7 895.0 894.5 896.7 895.3 902.2 907.5 901.4 907.5 DAY-HOUR 26- 6 13- 6 16- 6 4- 6 7- 3 12- 3 3- 6 29- 6 25- 6 2- 3 18- 6 4- 6 MIN. QFE PRESSURE IN HPA 882.0 880.4 880.5 880.5 882.3 878.4 880.5 878.5 878.6 883.7 889.4 885.9 878.4 DAY-HOUR 6-12 9-12 2-12 13-12 29-15 18-15 6-12 7-15 21-12 26-15 2-15 29-12 MEAN QNH PRESSURE IN HPA 1020.7 1017.1 1014.4 1015.8 1015.7 1012.9 1013.2 1012.5 1013.1 1019.1 1024.3 1020.8 1016.6 MAX. QNH PRESSURE IN HPA 1030.9 1025.2 1020.5 1026.9 1021.7 1022.1 1021.5 1024.0 1022.4 1030.1 1036.0 1029.2 1036.0 DAY-HOUR 26- 6 13- 6 16- 6 4- 6 7- 3 12- 3 3- 6 29- 6 25- 6 2- 3 18- 6 4- 6 MIN. QNH PRESSURE IN HPA 1007.6 1005.8 1005.9 1005.9 1007.9 1003.6 1005.9 1003.7 1003.8 1009.5 1015.8 1011.9 1003.6 DAY-HOUR 6-12 9-12 2-12 13-12 29-15 18-15 6-12 7-15 21-12 26-15 2-15 29-12 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 893.9 890.8 888.5 890.2 890.4 888.5 888.7 888.2 888.6 893.1 897.5 894.1 891.0 MAX. QFE PRESSURE IN HPA 902.1 897.0 893.1 899.1 894.7 895.0 893.3 895.9 894.4 902.2 906.3 900.1 906.3 DAY 26 13 16 4 7 12 3 29 25 2 18 4 MIN. QFE PRESSURE IN HPA 885.0 883.9 882.2 880.6 885.1 882.7 883.8 882.0 883.0 884.1 891.8 888.5 880.6 DAY 6 10 26 13 29 19 7 8 8 27 7 25 MEAN QNH PRESSURE IN HPA 1020.8 1017.4 1014.9 1016.7 1017.0 1014.9 1015.0 1014.5 1014.9 1020.0 1024.8 1021.1 1017.7 MAX. QNH PRESSURE IN HPA 1030.0 1024.3 1020.0 1026.6 1021.7 1022.1 1020.2 1023.1 1021.4 1030.1 1034.7 1027.8 1034.7 DAY 26 13 16 4 7 12 3 29 25 2 18 4 MIN. QNH PRESSURE IN HPA 1010.9 1009.7 1007.8 1006.0 1011.1 1008.4 1009.6 1007.6 1008.7 1009.9 1018.5 1014.8 1006.0 DAY 6 10 26 13 29 19 7 8 8 27 7 25 MEAN QFF PRESSURE IN HPA 1025.0 1020.0 1016.3 1015.3 1011.9 1008.0 1006.3 1005.8 1008.1 1017.2 1026.0 1022.9 1015.3 MAX. QFF PRESSURE IN HPA 1035.5 1029.8 1022.7 1029.3 1018.4 1018.1 1012.0 1016.2 1016.7 1026.9 1038.5 1031.1 1038.5 DAY 26 4 16 4 7 12 3 29 25 2 18 4 MIN. QFF PRESSURE IN HPA 1012.0 1008.9 1008.4 1004.3 1005.3 999.4 1001.5 998.5 1000.3 1006.1 1016.9 1015.4 998.5 DAY 6 10 26 18 29 19 25 8 8 27 6 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 894.9 891.8 889.2 890.8 890.7 888.5 888.8 888.5 889.1 894.1 898.6 895.3 891.7 MAX. QFE PRESSURE IN HPA 902.9 897.8 893.6 899.3 894.6 894.4 894.5 896.7 895.3 902.2 907.5 901.4 907.5 DAY 26 13 16 4 7 12 3 29 25 2 18 4 MIN. QFE PRESSURE IN HPA 884.9 884.0 882.8 881.7 885.2 883.3 884.1 882.8 883.0 885.4 892.4 889.3 881.7 DAY 6 9 2 13 29 19 6 8 8 27 6 25 MEAN QNH PRESSURE IN HPA 1022.0 1018.5 1015.6 1017.4 1017.3 1014.8 1015.2 1014.8 1015.5 1021.1 1026.1 1022.4 1018.4 MAX. QNH PRESSURE IN HPA 1030.9 1025.2 1020.5 1026.9 1021.6 1021.4 1021.5 1024.0 1022.4 1030.1 1036.0 1029.2 1036.0 DAY 26 13 16 4 7 12 3 29 25 2 18 4 MIN. QNH PRESSURE IN HPA 1010.8 1009.8 1008.5 1007.3 1011.2 1009.0 1009.9 1008.5 1008.7 1011.4 1019.2 1015.7 1007.3 DAY 6 9 2 13 29 19 6 8 8 27 6 25 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 894.2 891.0 888.5 889.8 889.6 887.0 887.3 886.7 887.3 892.7 897.4 894.2 890.5 MAX. QFE PRESSURE IN HPA 901.6 897.2 892.6 898.4 893.4 892.7 893.7 895.3 893.7 900.0 906.3 899.9 906.3 DAY 26 13 15 4 7 12 3 29 25 2 18 4 MIN. QFE PRESSURE IN HPA 883.5 881.7 882.3 880.7 883.9 882.0 882.3 880.9 880.7 885.1 890.9 886.8 880.7 DAY 6 9 2 13 29 18 6 8 8 27 6 29 MEAN QNH PRESSURE IN HPA 1021.2 1017.6 1014.8 1016.2 1016.0 1013.1 1013.5 1012.9 1013.5 1019.5 1024.7 1021.2 1017.0 MAX. QNH PRESSURE IN HPA 1029.4 1024.5 1019.4 1025.9 1020.3 1019.5 1020.6 1022.4 1020.6 1027.6 1034.7 1027.5 1034.7 DAY 26 13 15 4 7 12 3 29 25 2 18 4 MIN. QNH PRESSURE IN HPA 1009.3 1007.3 1007.9 1006.1 1009.7 1007.6 1007.9 1006.4 1006.1 1011.1 1017.5 1012.9 1006.1 DAY 6 9 2 13 29 18 6 8 8 27 6 29 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 892.7 889.4 887.2 888.2 887.9 885.1 885.4 884.5 885.1 890.9 895.6 892.6 888.7 MAX. QFE PRESSURE IN HPA 900.1 895.2 891.1 896.9 891.5 891.1 892.0 893.3 891.3 898.5 903.8 898.4 903.8 DAY 10 13 15 4 7 11 3 29 25 18 18 7 MIN. QFE PRESSURE IN HPA 882.0 880.4 880.5 880.5 882.4 879.3 880.5 878.8 878.6 884.3 889.5 885.9 878.6 DAY 6 9 2 13 29 18 6 8 21 26 6 29 MEAN QNH PRESSURE IN HPA 1019.6 1015.9 1013.4 1014.5 1014.1 1011.0 1011.4 1010.4 1011.1 1017.5 1022.8 1019.5 1015.1 MAX. QNH PRESSURE IN HPA 1027.8 1022.3 1017.7 1024.2 1018.2 1017.7 1018.7 1020.2 1018.0 1026.0 1031.9 1025.9 1031.9 DAY 10 13 15 4 7 11 3 29 25 18 18 7 MIN. QNH PRESSURE IN HPA 1007.6 1005.8 1005.9 1005.9 1008.0 1004.6 1005.9 1004.0 1003.8 1010.2 1016.0 1011.9 1003.8 DAY 6 9 2 13 29 18 6 8 21 26 6 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 893.1 889.7 887.2 888.0 887.7 884.7 885.1 884.0 884.9 891.0 895.8 893.0 888.7 MAX. QFE PRESSURE IN HPA 901.2 895.4 891.8 897.3 892.7 891.0 891.2 893.0 892.4 899.2 903.8 898.7 903.8 DAY 9 3 15 4 3 11 3 29 30 18 17 7 MIN. QFE PRESSURE IN HPA 882.9 881.0 881.0 880.9 882.3 878.4 880.7 878.5 878.6 883.7 889.4 887.4 878.4 DAY 6 9 2 9 29 18 6 7 21 26 2 29 MEAN QNH PRESSURE IN HPA 1020.0 1016.1 1013.4 1014.3 1014.0 1010.6 1011.1 1009.8 1010.8 1017.6 1023.0 1019.9 1015.0 MAX. QNH PRESSURE IN HPA 1029.0 1022.5 1018.5 1024.6 1019.5 1017.6 1017.9 1019.9 1019.2 1026.8 1031.9 1026.2 1031.9 DAY 9 3 15 4 3 11 3 29 30 18 17 7 MIN. QNH PRESSURE IN HPA 1008.6 1006.5 1006.5 1006.4 1007.9 1003.6 1006.1 1003.7 1003.8 1009.5 1015.8 1013.6 1003.6 DAY 6 9 2 9 29 18 6 7 21 26 2 29 MEAN QFF PRESSURE IN HPA 1024.2 1018.7 1014.7 1012.7 1008.9 1003.7 1002.3 1001.2 1004.0 1014.8 1024.2 1021.6 1012.6 MAX. QFF PRESSURE IN HPA 1033.1 1029.3 1020.3 1026.9 1015.2 1013.5 1008.9 1013.3 1015.0 1025.6 1035.3 1028.4 1035.3 DAY 10 3 19 4 3 11 3 29 30 18 18 3 MIN. QFF PRESSURE IN HPA 1010.4 1006.3 1006.9 1004.2 1001.3 994.8 997.7 994.7 997.8 1004.5 1013.7 1014.0 994.7 DAY 6 9 25 9 29 18 24 7 8 26 6 29 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 MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.5 -2.7 4.4 14.9 19.9 26.1 28.4 29.9 22.4 18.8 7.6 3.7 14.5 MINIMUN AIR TEMPERATURE (C) -4.8 -8.5 -1.9 6.0 10.6 16.1 19.4 20.6 13.2 10.1 2.5 -0.9 6.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 5 14 0 0 0 0 19 DAYS WITH MINIMUM TEMP. <=-4 16 17 8 0 0 0 0 0 0 0 0 7 48 DAYS WITH FREEZING MIN.<= 0 28 23 19 3 0 0 0 0 0 0 3 20 96 TEMPERATURE RECORDS LOWEST(C) -15.6 -20.0 -11.8 -3.2 3.8 11.8 15.7 16.0 7.8 5.0 -2.2 -7.6 -20.0 DAY 29 2 9 12 6 2 6 21 15 24 29 29 MAXIMUM AIR TEMPERATURE (C) 5.6 2.6 9.7 21.2 25.8 32.1 34.3 36.6 29.1 24.9 12.2 8.1 20.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 5 26 28 31 13 2 0 0 109 DAYS WITH MAXIMUM TEMP. <= 0 8 11 3 0 0 0 0 0 0 0 0 0 22 TEMPERATURE RECORDS HIGHEST(C) 15.2 11.3 19.6 33.0 33.0 36.2 40.7 41.0 35.8 30.0 16.0 15.2 41.0 DAY 6 20 31 26 27 26 29 14 1 2 20 8 DIF. BETWEEN (MAX.-MIN.) (C) 10.4 11.1 11.6 15.2 15.2 16.0 14.9 16.0 15.9 14.8 9.7 9.0 13.4 MEAN DAILY TEMP. (MDT) (C) 0.4 -3.0 3.9 13.6 18.2 24.1 26.8 28.6 21.2 17.5 7.3 3.6 13.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 4.2 13.3 96.7 181.4 235.2 29.9 1.0 0.0 0.0 561.9 HEATING DEG. DAYS(BASE 18 0C) 546.7 587.3 437.5 151.1 32.8 0.0 0.0 0.0 5.5 43.3 319.9 446.6 2570.6 DEWPOINT (MEAN C) -5.6 -8.2 -3.4 -0.1 5.5 7.8 11.9 10.4 5.0 2.8 2.8 -1.0 2.3 MIXING RATIO (G/KG) 2.99 2.64 3.49 4.50 6.62 7.84 10.14 9.22 6.30 5.37 5.32 4.12 5.71 VAPOUR PRESSURE (HPA) 4.27 3.76 4.95 6.36 9.36 11.00 14.17 12.93 8.92 7.63 7.58 5.86 8.07 SATURATION DEF. (HPA) 2.73 1.92 4.10 12.20 15.21 24.28 26.31 31.56 19.99 15.30 3.17 2.41 13.27 RELATIVE HUMIDITY (MEAN %) 67 68 61 41 44 36 40 33 36 38 73 74 51 RELATIVE HUMIDITY (MAX. %) 84 89 84 68 72 59 62 52 56 56 90 90 72 RELATIVE HUMIDITY (MIN. %) 50 51 44 23 27 19 25 20 22 25 57 58 35 RELATIVE HUMIDITY (MEAN% 03UTC) 82 87 84 67 69 58 60 52 55 56 90 90 71 RELATIVE HUMIDITY (MEAN% 09UTC) 60 61 54 32 35 28 35 28 31 32 67 67 44 RELATIVE HUMIDITY (MEAN% 15UTC) 60 60 54 30 36 28 31 25 28 31 69 70 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 46.1 8.3 23.1 13.4 56.9 28.9 37.4 0.0 4.3 3.5 56.8 18.6 297.3 DAYS WITH PRECIPITATION >=10 1 0 1 0 2 1 1 0 0 0 3 0 9 DAYS WITH PRECIPITATION >= 5 2 0 1 1 3 2 1 0 0 0 5 2 17 DAYS WITH PRECIPITATION >= 1 5 4 6 3 7 9 1 0 2 1 6 5 49 DAYS WITH PRECIPITATION 8 5 9 8 10 10 6 1 2 4 10 8 81 GREATEST DAILY PRECIPITATION 32.2 3.0 13.0 8.0 23.0 12.0 36.0 0.0 3.3 2.0 18.0 6.0 36.0 DAY 16 27 7 5 18 10 5 ** 14 21 3 1 DAY WITH THUNDER STORM 0 0 0 4 7 10 4 1 1 0 0 0 27 DAYS WITH SNOW OR SLEET 5 5 4 0 0 0 0 0 0 0 0 2 16 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 45 270 270 45 45 45 45 45 270 45 135 45 PREVAILING WIND SPEED(KNOTS) 7.7 9.4 11.3 11.8 7.8 11.6 9.8 11.8 11.2 10.1 6.9 4.8 10.1 PREVAILING WIND PERCENT 7.7 13.6 17.4 19.3 11.0 15.3 35.5 36.8 20.0 8.4 6.0 5.2 13.6 CALMS PERCENT OF WIND 64.5 72.9 49.0 46.0 49.0 39.3 29.0 27.7 52.0 61.9 86.7 80.0 54.7 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 303 31 263 246 13 34 62 56 31 263 72 125 38 VECTOR WIND MAGNITUDE(KNOTS) 0.3 1.0 1.9 3.6 0.1 1.4 5.6 5.6 1.6 1.1 0.5 0.2 0.8 WIND STEADINESES (MEAN %) 13.0 41.7 38.8 65.5 2.1 24.1 83.6 80.0 34.0 37.9 71.4 15.4 19.5 WIND SPEED (MEAN KNOTS) 2.3 2.4 4.9 5.5 4.7 5.8 6.7 7.0 4.7 2.9 0.7 1.3 4.1 FASTEST WIND DIRECTION 240 290 210 240 80 260 50 20 60 260 50 170 80 FASTEST WIND SPEED (KNOTS) 17 19 27 27 29 27 23 19 23 17 12 12 29 DAY 28 5 19 10 8 9 3 5 7 21 6 5 DAYS WITH SKY CLEAR (0-2)/8 17 18 8 12 16 22 28 28 25 20 14 12 220 DAYS WITH P.CLOUDY (3-6)/8 10 8 14 15 14 7 3 3 5 8 8 12 107 DAYS WITH CLOUDY (7-8)/8 4 2 9 3 1 1 0 0 0 3 8 7 38 DAYS WITH VISIBILITY =< 2 KM 0 0 1 0 0 0 0 0 0 0 0 1 2 DURATION OF SUNSHINE HOURS 188.5 206.2 184.9 261.3 298.0 336.7 380.8 352.3 306.6 267.7 162.2 142.7 3087.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 891.8 892.8 887.5 887.1 889.8 885.4 883.5 884.9 889.9 892.0 894.7 892.4 889.3 MAX. QFE PRESSURE IN HPA 900.8 902.3 903.5 896.0 896.9 891.6 891.1 892.1 898.2 899.3 905.9 902.4 905.9 DAY-HOUR 19- 6 7- 6 11- 6 13- 6 12- 3 8- 3 19- 6 21- 3 14- 6 9- 6 8- 6 28- 6 MIN. QFE PRESSURE IN HPA 880.8 881.9 876.2 876.5 879.5 877.2 876.6 876.9 880.1 883.9 889.5 881.9 876.2 DAY-HOUR 16- 3 5- 6 25-12 9-12 4-15 24-12 16-15 5-15 2-12 2-12 5- 3 9-12 MEAN QNH PRESSURE IN HPA 1018.6 1019.6 1013.7 1013.3 1016.3 1011.4 1009.2 1010.9 1016.4 1018.8 1021.7 1019.2 1015.7 MAX. QNH PRESSURE IN HPA 1028.5 1030.2 1031.6 1023.2 1024.2 1018.3 1017.7 1018.8 1025.6 1026.9 1034.2 1030.3 1034.2 DAY-HOUR 19- 6 7- 6 11- 6 13- 6 12- 3 8- 3 19- 6 21- 3 14- 6 9- 6 8- 6 28- 6 MIN. QNH PRESSURE IN HPA 1006.3 1007.5 1001.1 1001.5 1004.8 1002.3 1001.6 1001.9 1005.5 1009.7 1016.0 1007.5 1001.1 DAY-HOUR 16- 3 5- 6 25-12 9-12 4-15 24-12 16-15 5-15 2-12 2-12 5- 3 9-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 892.2 893.0 888.0 888.4 891.1 887.0 885.3 886.8 891.5 893.0 895.1 892.6 890.3 MAX. QFE PRESSURE IN HPA 900.1 900.2 902.7 895.3 896.9 891.6 890.9 892.1 897.7 898.2 905.0 900.4 905.0 DAY 24 7 11 13 12 8 19 21 15 9 8 28 MIN. QFE PRESSURE IN HPA 880.8 883.2 879.0 879.9 881.3 881.7 880.2 880.9 884.4 888.5 889.5 882.3 879.0 DAY 16 5 7 5 4 30 11 5 2 2 5 10 MEAN QNH PRESSURE IN HPA 1019.0 1019.8 1014.2 1014.8 1017.7 1013.2 1011.3 1013.0 1018.1 1019.9 1022.2 1019.4 1016.9 MAX. QNH PRESSURE IN HPA 1027.8 1027.9 1030.7 1022.4 1024.2 1018.3 1017.5 1018.8 1025.1 1025.6 1033.2 1028.1 1033.2 DAY 24 7 11 13 12 8 19 21 15 9 8 28 MIN. QNH PRESSURE IN HPA 1006.3 1008.9 1004.3 1005.3 1006.8 1007.3 1005.6 1006.4 1010.3 1014.8 1016.0 1007.9 1004.3 DAY 16 5 7 5 4 30 11 5 2 2 5 10 MEAN QFF PRESSURE IN HPA 1023.4 1026.2 1016.8 1012.6 1013.2 1005.8 1002.6 1003.8 1012.5 1015.9 1023.0 1022.1 1014.8 MAX. QFF PRESSURE IN HPA 1034.1 1038.5 1037.6 1023.7 1020.4 1011.2 1009.2 1012.3 1022.9 1022.3 1034.8 1033.5 1038.5 DAY 24 7 11 13 12 19 19 21 15 9 8 28 MIN. QFF PRESSURE IN HPA 1009.5 1012.4 1004.7 1003.0 1001.0 999.7 995.1 996.0 1002.4 1009.6 1015.6 1008.7 995.1 DAY 16 23 25 5 4 30 11 5 2 6 5 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 893.3 894.0 888.9 888.8 891.2 887.0 885.3 887.2 892.0 893.9 896.1 893.8 891.0 MAX. QFE PRESSURE IN HPA 900.8 902.3 903.5 896.0 896.9 891.5 891.1 892.1 898.2 899.3 905.9 902.4 905.9 DAY 19 7 11 13 12 8 19 21 14 9 8 28 MIN. QFE PRESSURE IN HPA 882.9 881.9 879.7 878.7 881.8 881.5 880.2 881.1 884.2 888.7 890.6 883.8 878.7 DAY 16 5 7 9 4 30 11 5 2 2 5 10 MEAN QNH PRESSURE IN HPA 1020.2 1021.0 1015.2 1015.2 1017.9 1013.2 1011.3 1013.4 1018.8 1020.8 1023.3 1020.7 1017.6 MAX. QNH PRESSURE IN HPA 1028.5 1030.2 1031.6 1023.2 1024.2 1018.2 1017.7 1018.8 1025.6 1026.9 1034.2 1030.3 1034.2 DAY 19 7 11 13 12 8 19 21 14 9 8 28 MIN. QNH PRESSURE IN HPA 1008.6 1007.5 1005.0 1003.9 1007.4 1007.0 1005.6 1006.6 1010.1 1015.1 1017.2 1009.6 1003.9 DAY 16 5 7 9 4 30 11 5 2 2 5 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 892.3 893.4 887.8 887.3 889.8 885.6 883.7 885.2 890.1 892.2 895.0 892.5 889.6 MAX. QFE PRESSURE IN HPA 900.3 902.1 902.5 894.5 895.2 890.0 889.5 890.0 898.2 897.9 904.8 900.4 904.8 DAY 19 7 11 13 12 8 19 24 14 9 8 28 MIN. QFE PRESSURE IN HPA 881.8 884.4 877.8 876.7 881.7 880.2 878.8 879.2 881.6 886.0 890.3 882.8 876.7 DAY 31 5 25 9 4 30 11 5 2 6 5 10 MEAN QNH PRESSURE IN HPA 1019.1 1020.3 1014.1 1013.5 1016.3 1011.6 1009.5 1011.2 1016.6 1019.0 1022.1 1019.3 1016.0 MAX. QNH PRESSURE IN HPA 1028.0 1030.0 1030.4 1021.5 1022.3 1016.5 1016.0 1016.5 1025.6 1025.3 1033.0 1028.1 1033.0 DAY 19 7 11 13 12 8 19 24 14 9 8 28 MIN. QNH PRESSURE IN HPA 1007.4 1010.3 1002.9 1001.7 1007.3 1005.6 1004.0 1004.5 1007.2 1012.1 1016.8 1008.5 1001.7 DAY 31 5 25 9 4 30 11 5 2 6 5 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 890.6 891.7 886.3 885.5 888.5 883.8 881.7 882.9 887.9 890.4 893.5 891.2 887.8 MAX. QFE PRESSURE IN HPA 899.1 900.4 900.0 892.3 893.4 887.9 887.3 887.3 896.8 895.7 902.6 899.2 902.6 DAY 23 7 11 13 12 8 19 24 14 9 7 28 MIN. QFE PRESSURE IN HPA 881.9 883.9 876.2 876.5 881.3 877.2 877.2 877.2 880.1 883.9 889.5 881.9 876.2 DAY 26 22 25 9 4 24 11 14 2 2 19 9 MEAN QNH PRESSURE IN HPA 1017.1 1018.4 1012.4 1011.5 1014.8 1009.6 1007.2 1008.6 1014.2 1017.0 1020.4 1017.9 1014.1 MAX. QNH PRESSURE IN HPA 1026.6 1028.1 1027.6 1019.1 1020.3 1014.2 1013.5 1013.5 1024.1 1022.9 1030.5 1026.8 1030.5 DAY 23 7 11 13 12 8 19 24 14 9 7 28 MIN. QNH PRESSURE IN HPA 1007.5 1009.7 1001.1 1001.5 1006.8 1002.3 1002.3 1002.3 1005.5 1009.7 1016.0 1007.5 1001.1 DAY 26 22 25 9 4 24 11 14 2 2 19 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 890.9 891.8 886.5 885.6 888.3 883.6 881.4 882.5 888.0 890.6 893.8 891.8 887.9 MAX. QFE PRESSURE IN HPA 899.4 900.0 899.5 891.9 893.8 888.1 887.5 887.1 896.4 895.5 903.1 898.8 903.1 DAY 23 7 11 13 11 10 19 24 14 9 7 28 MIN. QFE PRESSURE IN HPA 882.6 883.8 876.6 878.9 879.5 878.5 876.6 876.9 880.9 884.6 889.9 882.3 876.6 DAY 15 22 25 9 4 24 16 5 2 6 19 9 MEAN QNH PRESSURE IN HPA 1017.5 1018.5 1012.6 1011.6 1014.7 1009.4 1006.9 1008.2 1014.3 1017.2 1020.7 1018.5 1014.2 MAX. QNH PRESSURE IN HPA 1027.0 1027.6 1027.1 1018.6 1020.7 1014.4 1013.7 1013.3 1023.6 1022.6 1031.1 1026.3 1031.1 DAY 23 7 11 13 11 10 19 24 14 9 7 28 MIN. QNH PRESSURE IN HPA 1008.3 1009.6 1001.6 1004.1 1004.8 1003.7 1001.6 1001.9 1006.4 1010.5 1016.4 1007.9 1001.6 DAY 15 22 25 9 4 24 16 5 2 6 19 9 MEAN QFF PRESSURE IN HPA 1021.9 1024.7 1015.0 1009.3 1010.1 1002.1 998.2 998.9 1008.6 1013.3 1021.5 1021.2 1012.1 MAX. QFF PRESSURE IN HPA 1033.5 1038.0 1033.8 1018.7 1017.0 1008.9 1006.0 1005.8 1020.4 1021.3 1032.4 1032.0 1038.0 DAY 19 7 10 13 9 18 5 21 14 31 7 28 MIN. QFF PRESSURE IN HPA 1011.1 1011.0 1001.2 1002.4 1000.9 995.8 991.8 991.8 998.6 1004.6 1015.7 1007.9 991.8 DAY 15 22 25 27 4 25 10 5 2 6 3 9 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 MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -6.3 -3.4 6.8 15.4 19.9 27.9 28.8 29.2 24.5 17.2 11.3 5.7 14.7 MINIMUN AIR TEMPERATURE (C) -10.3 -7.4 0.8 7.4 11.1 17.1 19.0 19.3 15.0 8.0 4.5 -0.2 7.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 2 8 10 1 0 0 0 21 DAYS WITH MINIMUM TEMP. <=-4 26 22 7 0 0 0 0 0 0 0 0 3 58 DAYS WITH FREEZING MIN.<= 0 31 28 11 0 0 0 0 0 0 0 0 19 89 TEMPERATURE RECORDS LOWEST(C) -22.6 -14.4 -9.8 0.6 5.0 2.0 14.2 15.6 10.6 0.7 0.4 -5.2 -22.6 DAY 17 18 2 1 4 13 25 5 27 28 28 20 MAXIMUM AIR TEMPERATURE (C) -2.1 1.0 11.6 21.1 25.6 33.9 34.9 36.0 31.1 23.9 17.8 11.3 20.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 4 28 30 31 19 1 0 0 114 DAYS WITH MAXIMUM TEMP. <= 0 19 13 1 0 0 0 0 0 0 0 0 0 33 TEMPERATURE RECORDS HIGHEST(C) 5.2 9.8 20.8 30.0 32.0 39.6 39.4 41.6 39.6 31.4 23.8 18.8 41.6 DAY 1 8 24 15 28 24 18 29 1 1 9 11 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 8.4 10.8 13.7 14.5 16.8 15.9 16.7 16.1 15.9 13.3 11.5 13.5 MEAN DAILY TEMP. (MDT) (C) -6.2 -3.2 6.2 14.2 18.3 25.5 26.9 27.7 23.1 15.9 11.2 5.5 13.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 8.0 139.4 183.9 206.3 73.3 1.5 0.0 0.0 612.5 HEATING DEG. DAYS(BASE 18 0C) 750.9 593.2 364.9 120.5 31.7 1.5 0.0 0.0 0.0 82.3 205.5 386.9 2537.3 DEWPOINT (MEAN C) -9.6 -7.7 -0.8 4.9 7.7 8.9 9.3 10.6 7.6 2.3 2.1 -1.9 2.8 MIXING RATIO (G/KG) 2.26 2.51 4.23 6.28 7.64 8.26 8.62 9.34 7.52 5.18 5.13 3.79 5.90 VAPOUR PRESSURE (HPA) 3.22 3.58 6.00 8.89 10.78 11.64 12.09 13.12 10.61 7.38 7.31 5.41 8.34 SATURATION DEF. (HPA) 0.93 1.34 4.66 9.84 13.58 27.78 29.11 29.74 21.99 13.65 6.76 4.19 13.63 RELATIVE HUMIDITY (MEAN %) 78 74 62 54 49 33 33 35 38 40 58 61 51 RELATIVE HUMIDITY (MAX. %) 88 86 83 77 76 54 52 57 60 61 77 78 71 RELATIVE HUMIDITY (MIN. %) 67 62 47 37 31 21 21 20 23 27 43 47 37 RELATIVE HUMIDITY (MEAN% 03UTC) 87 85 80 76 75 54 52 57 60 60 76 76 70 RELATIVE HUMIDITY (MEAN% 09UTC) 71 70 54 46 40 26 27 30 31 35 53 54 45 RELATIVE HUMIDITY (MEAN% 15UTC) 79 71 55 45 38 25 26 25 28 33 52 57 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 88.1 19.5 38.5 41.0 34.8 5.7 11.3 13.0 3.2 7.2 16.4 8.0 286.7 DAYS WITH PRECIPITATION >=10 3 0 2 1 1 0 0 1 0 0 1 0 9 DAYS WITH PRECIPITATION >= 5 5 1 2 3 1 0 1 1 0 0 1 1 16 DAYS WITH PRECIPITATION >= 1 12 6 5 6 8 2 4 2 2 2 3 2 54 DAYS WITH PRECIPITATION 15 11 10 11 10 5 5 2 3 2 5 5 84 GREATEST DAILY PRECIPITATION 25.0 6.0 16.0 17.0 12.0 4.0 5.0 11.0 2.0 4.2 13.0 6.0 25.0 DAY 6 7 18 28 25 1 2 3 12 11 11 27 DAY WITH THUNDER STORM 0 0 0 3 6 3 0 1 1 0 0 0 14 DAYS WITH SNOW OR SLEET 14 9 2 0 0 0 0 0 0 0 0 1 26 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 45 45 225 225 90 45 45 45 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 4.7 8.3 12.8 9.1 6.8 11.8 10.8 10.4 9.6 11.1 8.7 8.0 9.7 PREVAILING WIND PERCENT 3.9 12.1 10.3 9.3 11.0 26.0 25.8 23.2 19.3 11.0 6.0 7.7 13.3 CALMS PERCENT OF WIND 88.4 76.4 64.5 60.7 57.4 39.3 30.3 41.9 48.0 71.0 78.0 76.8 61.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 334 27 252 264 29 69 65 67 61 58 73 59 61 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.9 2.2 0.4 0.2 4.6 4.7 3.8 2.4 1.8 0.3 0.6 1.4 WIND STEADINESES (MEAN %) 33.3 56.3 61.1 12.1 5.7 70.8 68.1 73.1 58.5 66.7 21.4 40.0 41.2 WIND SPEED (MEAN KNOTS) 0.6 1.6 3.6 3.3 3.5 6.5 6.9 5.2 4.1 2.7 1.4 1.5 3.4 FASTEST WIND DIRECTION 20 120 250 230 220 260 70 50 60 60 240 280 120 FASTEST WIND SPEED (KNOTS) 10 41 29 16 31 27 23 23 23 21 16 16 41 DAY 9 1 30 3 28 3 31 17 3 8 10 18 DAYS WITH SKY CLEAR (0-2)/8 8 7 10 9 9 26 27 27 30 21 16 14 204 DAYS WITH P.CLOUDY (3-6)/8 6 10 12 10 21 4 3 4 0 8 13 14 105 DAYS WITH CLOUDY (7-8)/8 17 11 9 11 1 0 1 0 0 2 1 3 56 DAYS WITH VISIBILITY =< 2 KM 3 6 1 0 0 0 0 0 0 0 0 1 11 DURATION OF SUNSHINE HOURS 93.8 134.2 192.4 226.5 311.0 361.8 348.6 362.2 323.3 281.6 187.2 169.6 2992.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 892.3 893.0 888.7 889.1 889.3 888.0 884.9 887.3 888.7 893.6 894.0 895.3 890.3 MAX. QFE PRESSURE IN HPA 901.4 906.8 898.7 900.6 897.4 896.0 894.2 892.3 895.9 903.1 901.4 904.9 906.8 DAY-HOUR 22- 6 22- 9 26- 6 12- 6 8- 6 17- 3 20- 6 25- 3 27- 6 9- 6 21- 6 29- 6 MIN. QFE PRESSURE IN HPA 880.0 877.8 877.9 878.9 880.0 880.6 874.9 880.9 881.0 882.8 884.2 887.7 874.9 DAY-HOUR 13- 3 8- 3 18-12 21-12 20-15 24-12 5-12 16-12 5-15 1-12 10-12 20-15 MEAN QNH PRESSURE IN HPA 1019.0 1019.9 1015.1 1015.5 1015.7 1014.3 1010.8 1013.5 1015.0 1020.5 1020.9 1022.4 1016.9 MAX. QNH PRESSURE IN HPA 1029.2 1035.2 1026.2 1028.3 1024.8 1023.2 1021.2 1019.1 1023.1 1031.1 1029.2 1033.1 1035.2 DAY-HOUR 22- 6 22- 9 26- 6 12- 6 8- 6 17- 3 20- 6 25- 3 27- 6 9- 6 21- 6 29- 6 MIN. QNH PRESSURE IN HPA 1005.4 1002.9 1003.0 1004.1 1005.4 1006.0 999.7 1006.4 1006.5 1008.5 1010.1 1014.0 999.7 DAY-HOUR 13- 3 8- 3 18-12 21-12 20-15 24-12 5-12 16-12 5-15 1-12 10-12 20-15 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 892.1 892.8 889.2 890.0 890.5 889.7 886.7 889.1 890.3 894.7 894.7 895.7 891.3 MAX. QFE PRESSURE IN HPA 900.2 905.8 897.2 900.1 896.3 896.0 894.0 892.3 895.4 902.2 900.3 903.6 905.8 DAY 22 23 26 12 4 17 20 25 27 9 21 29 MIN. QFE PRESSURE IN HPA 880.0 877.8 879.7 882.5 882.7 885.2 879.6 885.0 885.8 887.3 888.1 888.4 877.8 DAY 13 8 30 23 21 24 5 13 2 1 10 21 MEAN QNH PRESSURE IN HPA 1018.8 1019.6 1015.7 1016.5 1017.0 1016.2 1012.9 1015.5 1016.9 1021.7 1021.8 1022.8 1018.0 MAX. QNH PRESSURE IN HPA 1027.9 1034.1 1024.5 1027.8 1023.5 1023.2 1021.0 1019.1 1022.5 1030.1 1028.0 1031.7 1034.1 DAY 22 23 26 12 4 17 20 25 27 9 21 29 MIN. QNH PRESSURE IN HPA 1005.4 1002.9 1005.0 1008.2 1008.4 1011.2 1004.9 1010.9 1011.8 1013.5 1014.4 1014.7 1002.9 DAY 13 8 30 23 21 24 5 13 2 1 10 21 MEAN QFF PRESSURE IN HPA 1026.7 1025.8 1016.9 1013.8 1012.4 1008.1 1004.3 1006.8 1010.3 1018.6 1021.0 1024.8 1015.8 MAX. QFF PRESSURE IN HPA 1038.5 1042.7 1026.8 1023.7 1022.5 1016.5 1012.2 1011.4 1018.9 1029.0 1027.2 1035.4 1042.7 DAY 17 23 4 12 4 17 20 3 27 9 24 29 MIN. QFF PRESSURE IN HPA 1011.4 1006.0 1002.5 1005.1 1002.6 1001.0 996.4 1000.9 1002.2 1007.9 1011.8 1017.2 996.4 DAY 13 8 30 20 21 24 6 13 2 1 10 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 893.1 894.0 890.1 890.7 890.9 889.7 886.7 889.4 890.8 895.7 895.7 896.9 892.0 MAX. QFE PRESSURE IN HPA 901.4 906.4 898.7 900.6 897.4 895.1 894.2 892.1 895.9 903.1 901.4 904.9 906.4 DAY 22 22 26 12 8 17 20 25 27 9 21 29 MIN. QFE PRESSURE IN HPA 882.3 879.1 881.3 883.2 882.6 884.7 879.0 885.6 886.5 888.0 887.7 890.0 879.0 DAY 13 8 30 21 21 24 5 13 2 1 10 21 MEAN QNH PRESSURE IN HPA 1020.0 1021.0 1016.6 1017.3 1017.5 1016.2 1012.8 1015.8 1017.4 1022.9 1022.9 1024.2 1018.7 MAX. QNH PRESSURE IN HPA 1029.2 1034.8 1026.2 1028.3 1024.8 1022.2 1021.2 1018.8 1023.1 1031.1 1029.2 1033.1 1034.8 DAY 22 22 26 12 8 17 20 25 27 9 21 29 MIN. QNH PRESSURE IN HPA 1007.9 1004.4 1006.8 1008.9 1008.3 1010.6 1004.3 1011.6 1012.6 1014.3 1014.0 1016.5 1004.3 DAY 13 8 30 21 21 24 5 13 2 1 10 21 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 892.7 893.5 889.1 889.5 889.4 888.2 885.0 887.6 888.9 893.9 894.2 895.6 890.6 MAX. QFE PRESSURE IN HPA 900.8 906.8 897.1 899.3 895.6 893.2 892.4 890.4 894.2 901.7 900.1 904.0 906.8 DAY 22 22 26 12 8 17 20 3 27 9 21 29 MIN. QFE PRESSURE IN HPA 883.2 878.8 879.1 879.9 881.2 883.0 876.8 883.5 884.1 885.1 886.3 889.2 876.8 DAY 30 8 18 21 21 24 5 16 2 1 10 21 MEAN QNH PRESSURE IN HPA 1019.5 1020.4 1015.5 1016.0 1015.9 1014.5 1011.0 1013.9 1015.3 1020.9 1021.2 1022.8 1017.2 MAX. QNH PRESSURE IN HPA 1028.5 1035.2 1024.4 1026.9 1022.7 1020.1 1019.2 1017.0 1021.2 1029.5 1027.8 1032.1 1035.2 DAY 22 22 26 12 8 17 20 3 27 9 21 29 MIN. QNH PRESSURE IN HPA 1008.9 1004.0 1004.4 1005.3 1006.7 1008.7 1001.8 1009.3 1009.9 1011.1 1012.4 1015.6 1001.8 DAY 30 8 18 21 21 24 5 16 2 1 10 21 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 891.6 892.2 887.6 887.9 887.9 886.5 883.2 885.4 886.8 891.8 892.4 894.0 888.9 MAX. QFE PRESSURE IN HPA 899.4 905.7 894.2 896.8 894.2 892.1 890.9 888.2 892.2 900.4 898.7 902.5 905.7 DAY 22 22 26 12 8 16 20 3 27 9 24 29 MIN. QFE PRESSURE IN HPA 882.4 878.6 877.9 878.9 880.0 880.6 874.9 880.9 882.1 882.8 884.2 888.1 874.9 DAY 30 8 18 21 21 24 5 16 2 1 10 17 MEAN QNH PRESSURE IN HPA 1018.3 1019.0 1013.8 1014.1 1014.2 1012.6 1008.9 1011.4 1012.9 1018.6 1019.1 1020.9 1015.3 MAX. QNH PRESSURE IN HPA 1027.0 1034.0 1021.2 1024.1 1021.2 1018.8 1017.5 1014.5 1019.0 1028.1 1026.2 1030.4 1034.0 DAY 22 22 26 12 8 16 20 3 27 9 24 29 MIN. QNH PRESSURE IN HPA 1008.0 1003.8 1003.0 1004.1 1005.4 1006.0 999.7 1006.4 1007.7 1008.5 1010.1 1014.4 999.7 DAY 30 8 18 21 21 24 5 16 2 1 10 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 MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 891.9 892.5 887.8 887.6 887.7 886.0 883.0 885.0 886.5 891.9 892.8 894.5 888.9 MAX. QFE PRESSURE IN HPA 899.3 905.9 893.6 896.3 894.0 892.8 890.6 888.8 892.4 901.1 899.1 901.4 905.9 DAY 22 22 27 11 3 16 20 2 27 9 24 29 MIN. QFE PRESSURE IN HPA 882.0 880.4 878.5 880.0 880.0 881.1 874.9 880.9 881.0 883.4 885.9 887.7 874.9 DAY 12 14 18 21 20 26 5 16 5 1 9 20 MEAN QNH PRESSURE IN HPA 1018.6 1019.3 1014.1 1013.9 1014.0 1012.0 1008.7 1010.9 1012.6 1018.6 1019.7 1021.5 1015.3 MAX. QNH PRESSURE IN HPA 1026.9 1034.2 1020.5 1023.5 1021.0 1019.6 1017.2 1015.2 1019.2 1028.9 1026.6 1029.2 1034.2 DAY 22 22 27 11 3 16 20 2 27 9 24 29 MIN. QNH PRESSURE IN HPA 1007.6 1005.8 1003.7 1005.4 1005.4 1006.6 999.7 1006.4 1006.5 1009.2 1011.9 1014.0 999.7 DAY 12 14 18 21 20 26 5 16 5 1 9 20 MEAN QFF PRESSURE IN HPA 1026.5 1025.5 1015.2 1011.0 1009.3 1003.9 1000.1 1002.1 1006.1 1015.5 1018.9 1023.5 1013.1 MAX. QFF PRESSURE IN HPA 1037.4 1043.2 1026.3 1019.4 1019.3 1012.3 1008.8 1008.0 1015.1 1027.8 1026.5 1033.2 1043.2 DAY 16 22 3 11 3 16 20 2 27 9 24 29 MIN. QFF PRESSURE IN HPA 1015.2 1007.9 1000.0 1001.9 999.3 996.5 990.6 996.5 997.5 1003.3 1010.0 1016.9 990.6 DAY 30 8 29 17 20 26 5 16 1 1 9 17 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.6 6.4 9.1 15.3 21.9 27.7 28.0 30.9 23.8 18.4 7.5 3.6 16.3 MINIMUN AIR TEMPERATURE (C) -2.6 -1.4 0.8 6.7 11.7 17.7 18.1 21.2 14.9 9.2 1.4 -0.5 8.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 6 19 0 0 0 0 25 DAYS WITH MINIMUM TEMP. <=-4 11 5 0 0 0 0 0 0 0 0 2 4 22 DAYS WITH FREEZING MIN.<= 0 22 22 12 0 0 0 0 0 0 0 9 21 86 TEMPERATURE RECORDS LOWEST(C) -8.0 -6.0 -3.4 0.4 4.0 14.0 10.6 16.6 8.0 3.2 -6.6 -6.0 -8.0 DAY 3 22 19 10 21 3 15 20 28 26 29 7 MAXIMUM AIR TEMPERATURE (C) 6.9 12.5 14.9 21.4 28.5 33.9 33.7 37.6 30.4 25.0 12.8 7.2 22.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 14 28 27 31 18 6 0 0 125 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 1 1 TEMPERATURE RECORDS HIGHEST(C) 12.5 17.0 21.2 30.0 37.5 38.2 39.6 41.2 36.6 32.0 21.8 16.4 41.2 DAY 31 27 31 30 31 24 31 26 3 1 19 29 DIF. BETWEEN (MAX.-MIN.) (C) 9.5 13.9 14.1 14.7 16.8 16.2 15.6 16.4 15.5 15.8 11.4 7.7 14.0 MEAN DAILY TEMP. (MDT) (C) 2.2 5.6 7.9 14.0 20.1 25.8 25.9 29.4 22.6 17.1 7.1 3.3 15.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 35.4 143.5 157.3 259.2 69.9 2.7 0.0 0.0 668.1 HEATING DEG. DAYS(BASE 18 0C) 491.1 348.4 314.2 125.8 22.8 0.0 0.6 0.0 3.6 63.1 327.0 455.4 2151.9 DEWPOINT (MEAN C) -3.3 -3.5 -2.7 1.7 3.6 5.9 8.3 9.4 7.0 1.7 -0.1 -1.2 2.2 MIXING RATIO (G/KG) 3.47 3.41 3.65 4.97 5.75 6.73 7.88 8.65 7.33 4.99 4.36 3.99 5.43 VAPOUR PRESSURE (HPA) 4.95 4.85 5.18 7.05 8.13 9.48 11.07 12.14 10.34 7.08 6.21 5.72 7.68 SATURATION DEF. (HPA) 2.63 5.34 7.09 11.53 20.14 29.40 28.57 34.85 21.07 15.86 4.81 2.51 15.32 RELATIVE HUMIDITY (MEAN %) 68 53 48 44 35 28 32 30 38 37 62 74 46 RELATIVE HUMIDITY (MAX. %) 85 76 71 71 58 47 49 48 60 56 84 88 66 RELATIVE HUMIDITY (MIN. %) 52 34 31 27 20 16 21 17 23 25 43 59 31 RELATIVE HUMIDITY (MEAN% 03UTC) 84 76 68 71 57 46 49 47 60 55 81 87 65 RELATIVE HUMIDITY (MEAN% 09UTC) 61 45 40 36 29 23 26 25 33 31 55 67 39 RELATIVE HUMIDITY (MEAN% 15UTC) 62 44 38 33 25 21 26 22 27 33 57 71 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 40.0 11.6 14.7 27.7 13.6 0.3 5.0 7.9 2.0 13.3 31.4 5.0 172.5 DAYS WITH PRECIPITATION >=10 2 0 0 0 0 0 0 0 0 0 1 0 3 DAYS WITH PRECIPITATION >= 5 2 1 0 3 1 0 0 1 0 1 2 0 11 DAYS WITH PRECIPITATION >= 1 5 3 5 7 4 0 1 2 1 3 5 3 39 DAYS WITH PRECIPITATION 7 4 7 9 9 4 3 5 3 6 9 3 69 GREATEST DAILY PRECIPITATION 21.0 7.0 4.0 8.0 6.0 0.3 4.7 5.0 1.0 7.0 17.2 2.0 21.0 DAY 9 8 16 18 14 16 14 9 27 31 1 14 DAY WITH THUNDER STORM 0 0 1 2 4 2 2 4 2 3 1 0 21 DAYS WITH SNOW OR SLEET 2 0 0 0 0 0 0 0 0 0 2 0 4 DAYS WITH DUST 0 1 0 0 0 1 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 45 270 270 45 45 45 90 90 45 270 45 90 45 PREVAILING WIND SPEED(KNOTS) 8.4 9.6 10.3 11.2 10.5 11.4 11.7 10.7 8.9 9.8 9.2 6.0 10.3 PREVAILING WIND PERCENT 5.8 12.1 9.0 15.3 15.5 19.3 32.3 20.0 23.3 11.0 6.7 4.5 12.5 CALMS PERCENT OF WIND 77.4 64.3 59.4 48.0 43.9 37.3 31.6 39.4 48.7 57.4 70.7 85.8 55.3 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 346 256 325 12 344 62 71 71 47 285 274 121 54 VECTOR WIND MAGNITUDE(KNOTS) 0.3 1.9 0.5 0.3 0.8 2.2 6.7 2.9 2.3 0.5 0.5 0.3 1.0 WIND STEADINESES (MEAN %) 16.7 63.3 14.7 5.7 14.8 36.1 88.2 49.2 57.5 13.9 20.8 37.5 24.4 WIND SPEED (MEAN KNOTS) 1.8 3.0 3.4 5.3 5.4 6.1 7.6 5.9 4.0 3.6 2.4 0.8 4.1 FASTEST WIND DIRECTION 280 240 80 260 250 290 60 50 310 300 340 260 250 FASTEST WIND SPEED (KNOTS) 19 23 21 21 27 23 21 21 17 21 23 12 27 DAY 30 3 4 2 18 1 5 19 26 6 8 14 DAYS WITH SKY CLEAR (0-2)/8 15 19 15 10 17 25 27 20 28 23 16 7 222 DAYS WITH P.CLOUDY (3-6)/8 9 8 12 17 12 5 4 11 2 6 7 11 104 DAYS WITH CLOUDY (7-8)/8 7 1 4 3 2 0 0 0 0 2 7 13 39 DAYS WITH VISIBILITY =< 2 KM 0 0 0 0 0 0 0 0 0 0 1 1 2 DURATION OF SUNSHINE HOURS 167.1 230.1 231.7 267.4 308.9 343.4 366.3 329.7 319.3 263.4 171.0 102.3 3100.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 893.5 889.6 888.8 888.9 887.7 885.0 884.5 885.9 888.2 891.4 893.4 897.2 889.5 MAX. QFE PRESSURE IN HPA 906.6 899.0 897.4 897.0 895.5 893.4 890.0 895.5 895.5 897.6 902.4 905.3 906.6 DAY-HOUR 2- 6 11- 6 5- 6 10- 6 28- 6 16- 3 28- 6 20- 6 28- 6 26- 6 30- 6 6- 6 MIN. QFE PRESSURE IN HPA 882.6 871.9 879.2 878.1 879.0 872.1 877.1 879.7 880.5 884.6 884.0 885.6 871.9 DAY-HOUR 9- 9 20-12 21-12 13-12 19-15 24-15 21-15 6-15 15-15 12-12 25-12 15-15 MEAN QNH PRESSURE IN HPA 1020.4 1016.0 1015.1 1015.3 1014.0 1010.9 1010.4 1011.9 1014.5 1018.1 1020.3 1024.5 1015.9 MAX. QNH PRESSURE IN HPA 1035.0 1026.5 1024.8 1024.3 1022.6 1020.3 1016.5 1022.6 1022.6 1025.0 1030.3 1033.6 1035.0 DAY-HOUR 2- 6 11- 6 5- 6 10- 6 28- 6 16- 3 28- 6 20- 6 28- 6 26- 6 30- 6 6- 6 MIN. QNH PRESSURE IN HPA 1008.3 996.3 1004.5 1003.3 1004.3 996.6 1002.1 1005.0 1005.9 1010.5 1009.8 1011.6 996.3 DAY-HOUR 9- 9 20-12 21-12 13-12 19-15 24-15 21-15 6-15 15-15 12-12 25-12 15-15 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 893.7 890.4 889.6 890.4 889.4 887.1 886.4 887.5 889.8 892.5 893.8 897.5 890.7 MAX. QFE PRESSURE IN HPA 905.6 897.4 896.5 895.7 895.2 893.4 889.7 895.3 895.1 896.8 900.8 904.6 905.6 DAY 2 11 5 10 28 16 18 20 28 26 30 6 MIN. QFE PRESSURE IN HPA 882.7 879.5 880.0 883.6 883.0 876.7 881.8 882.8 885.0 888.7 885.3 887.7 876.7 DAY 9 20 21 8 20 25 22 13 16 31 26 14 MEAN QNH PRESSURE IN HPA 1020.6 1016.9 1016.1 1016.9 1015.9 1013.2 1012.5 1013.7 1016.3 1019.3 1020.7 1024.9 1017.3 MAX. QNH PRESSURE IN HPA 1033.9 1024.8 1023.8 1022.9 1022.3 1020.3 1016.2 1022.4 1022.2 1024.1 1028.5 1032.8 1033.9 DAY 2 11 5 10 28 16 18 20 28 26 30 6 MIN. QNH PRESSURE IN HPA 1008.4 1004.8 1005.4 1009.4 1008.7 1001.7 1007.4 1008.5 1010.9 1015.1 1011.3 1014.0 1001.7 DAY 9 20 21 8 20 25 22 13 16 31 26 14 MEAN QFF PRESSURE IN HPA 1023.9 1018.7 1016.5 1014.6 1010.5 1005.2 1004.3 1004.4 1009.9 1015.6 1021.8 1027.8 1014.4 MAX. QFF PRESSURE IN HPA 1039.4 1026.8 1025.9 1024.4 1018.9 1015.2 1009.6 1016.4 1019.3 1024.4 1033.9 1038.4 1039.4 DAY 2 11 5 10 21 16 13 20 28 26 30 6 MIN. QFF PRESSURE IN HPA 1009.0 1004.2 1004.2 1006.6 1002.2 992.1 997.6 997.6 1003.3 1010.6 1010.5 1013.6 992.1 DAY 9 20 21 8 20 25 22 13 16 12 26 14 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 894.8 891.4 890.6 890.8 889.5 886.9 886.4 887.9 890.3 893.5 894.8 898.6 891.3 MAX. QFE PRESSURE IN HPA 906.6 899.0 897.4 897.0 895.5 893.4 890.0 895.5 895.5 897.6 902.4 905.3 906.6 DAY 2 11 5 10 28 16 28 20 28 26 30 6 MIN. QFE PRESSURE IN HPA 882.9 878.7 880.9 882.8 881.9 876.7 882.4 883.1 885.3 889.3 886.4 888.7 876.7 DAY 9 20 21 8 20 25 22 13 16 12 25 15 MEAN QNH PRESSURE IN HPA 1021.8 1018.1 1017.2 1017.4 1016.0 1013.1 1012.5 1014.2 1016.8 1020.4 1021.9 1026.0 1017.9 MAX. QNH PRESSURE IN HPA 1035.0 1026.5 1024.8 1024.3 1022.6 1020.3 1016.5 1022.6 1022.6 1025.0 1030.3 1033.6 1035.0 DAY 2 11 5 10 28 16 28 20 28 26 30 6 MIN. QNH PRESSURE IN HPA 1008.6 1003.9 1006.4 1008.5 1007.5 1001.7 1008.0 1008.8 1011.3 1015.7 1012.5 1015.1 1001.7 DAY 9 20 21 8 20 25 22 13 16 12 25 15 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 893.9 890.0 889.2 889.0 887.8 885.1 884.6 886.1 888.4 891.6 893.4 897.4 889.7 MAX. QFE PRESSURE IN HPA 905.1 897.9 896.9 895.7 893.5 891.7 888.1 893.4 894.0 896.4 901.5 904.8 905.1 DAY 2 11 18 10 28 16 18 20 28 26 30 5 MIN. QFE PRESSURE IN HPA 882.6 874.9 879.5 879.3 882.7 874.7 880.8 882.3 883.5 886.2 884.6 886.6 874.7 DAY 9 20 21 8 4 25 22 13 16 12 25 15 MEAN QNH PRESSURE IN HPA 1020.9 1016.5 1015.6 1015.4 1014.1 1011.1 1010.5 1012.2 1014.8 1018.3 1020.3 1024.7 1016.2 MAX. QNH PRESSURE IN HPA 1033.3 1025.3 1024.2 1022.9 1020.4 1018.4 1014.4 1020.3 1021.0 1023.6 1029.3 1033.0 1033.3 DAY 2 11 18 10 28 16 18 20 28 26 30 5 MIN. QNH PRESSURE IN HPA 1008.3 999.7 1004.8 1004.6 1008.4 999.5 1006.3 1007.9 1009.3 1012.3 1010.5 1012.7 999.5 DAY 9 20 21 8 4 25 22 13 16 12 25 15 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 892.4 887.9 887.2 887.1 886.0 883.1 882.8 884.0 886.3 889.6 892.2 896.0 887.9 MAX. QFE PRESSURE IN HPA 902.8 895.1 895.4 893.4 891.7 890.3 886.5 890.9 892.0 895.6 900.4 904.5 904.5 DAY 2 11 18 10 28 16 18 19 28 26 30 5 MIN. QFE PRESSURE IN HPA 883.2 871.9 879.2 878.1 879.5 873.3 877.9 880.4 881.2 884.6 884.0 885.9 871.9 DAY 9 20 21 13 19 24 21 29 15 12 25 15 MEAN QNH PRESSURE IN HPA 1019.2 1014.1 1013.4 1013.3 1012.1 1008.8 1008.5 1009.8 1012.4 1016.1 1019.0 1023.2 1014.2 MAX. QNH PRESSURE IN HPA 1030.8 1022.2 1022.5 1020.3 1018.4 1016.8 1012.6 1017.5 1018.7 1022.7 1028.1 1032.7 1032.7 DAY 2 11 18 10 28 16 18 19 28 26 30 5 MIN. QNH PRESSURE IN HPA 1008.9 996.3 1004.5 1003.3 1004.8 997.9 1003.0 1005.8 1006.7 1010.5 1009.8 1011.9 996.3 DAY 9 20 21 13 19 24 21 29 15 12 25 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 MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 892.7 888.2 887.2 887.3 886.0 882.8 882.6 883.9 886.1 889.9 892.8 896.5 888.0 MAX. QFE PRESSURE IN HPA 902.3 895.1 896.0 892.8 891.7 890.8 886.6 893.0 891.7 896.2 900.9 904.6 904.6 DAY 2 11 18 10 28 16 25 19 27 26 30 5 MIN. QFE PRESSURE IN HPA 883.2 873.9 880.3 879.0 879.0 872.1 877.1 879.7 880.5 886.2 885.4 885.6 872.1 DAY 9 20 21 13 19 24 21 6 15 12 25 15 MEAN QNH PRESSURE IN HPA 1019.5 1014.5 1013.4 1013.4 1012.0 1008.4 1008.2 1009.7 1012.1 1016.3 1019.7 1023.8 1014.3 MAX. QNH PRESSURE IN HPA 1030.2 1022.2 1023.2 1019.6 1018.4 1017.4 1012.7 1019.9 1018.4 1023.4 1028.7 1032.8 1032.8 DAY 2 11 18 10 28 16 25 19 27 26 30 5 MIN. QNH PRESSURE IN HPA 1008.9 998.6 1005.7 1004.3 1004.3 996.6 1002.1 1005.0 1005.9 1012.3 1011.4 1011.6 996.6 DAY 9 20 21 13 19 24 21 6 15 12 25 15 MEAN QFF PRESSURE IN HPA 1022.8 1016.0 1013.6 1011.0 1006.6 1000.4 999.9 1000.4 1005.7 1012.7 1020.7 1026.6 1011.4 MAX. QFF PRESSURE IN HPA 1035.6 1023.7 1025.6 1019.4 1012.4 1011.4 1006.0 1012.4 1015.3 1023.8 1034.0 1038.5 1038.5 DAY 2 11 18 10 1 16 12 19 27 26 30 5 MIN. QFF PRESSURE IN HPA 1010.6 998.3 1004.3 1001.0 997.3 987.0 992.4 994.7 999.3 1007.0 1011.5 1012.3 987.0 DAY 9 20 21 13 19 24 21 6 12 4 25 15 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 MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.7 0.9 6.9 15.7 19.9 24.6 28.6 27.7 22.8 13.8 6.4 2.5 14.2 MINIMUN AIR TEMPERATURE (C) -3.4 -4.2 0.3 8.8 12.1 16.1 20.3 20.0 15.4 7.8 2.1 -0.4 7.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 11 13 0 0 0 0 25 DAYS WITH MINIMUM TEMP. <=-4 13 13 5 0 0 0 0 0 0 0 0 2 33 DAYS WITH FREEZING MIN.<= 0 26 26 14 0 0 0 0 0 0 0 11 15 92 TEMPERATURE RECORDS LOWEST(C) -11.4 -11.6 -7.0 3.6 6.8 7.0 16.0 16.0 11.4 1.8 -1.8 -4.0 -11.6 DAY 18 9 16 11 11 13 4 17 27 30 29 6 MAXIMUM AIR TEMPERATURE (C) 5.4 6.7 13.9 22.8 28.0 33.0 37.0 36.1 31.1 20.4 12.0 6.4 21.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 9 23 31 31 22 0 0 0 116 DAYS WITH MAXIMUM TEMP. <= 0 2 1 0 0 0 0 0 0 0 0 0 0 3 TEMPERATURE RECORDS HIGHEST(C) 13.2 16.4 20.4 27.8 33.6 40.0 40.2 41.0 36.0 27.8 15.5 13.8 41.0 DAY 1 24 20 15 26 30 16 2 8 10 13 1 DIF. BETWEEN (MAX.-MIN.) (C) 8.8 10.9 13.6 14.0 15.9 16.9 16.7 16.1 15.7 12.6 9.9 6.8 13.2 MEAN DAILY TEMP. (MDT) (C) 1.0 1.2 7.1 15.8 20.0 24.5 28.7 28.1 23.2 14.1 7.0 3.0 14.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 19.8 120.0 237.2 219.0 73.8 0.0 0.0 0.0 669.9 HEATING DEG. DAYS(BASE 18 0C) 527.2 486.5 337.6 71.4 11.5 4.2 0.0 0.0 0.2 121.3 328.9 464.5 2353.5 DEWPOINT (MEAN C) -5.1 -5.9 -3.1 4.1 5.3 5.4 8.0 8.9 7.2 4.0 1.3 -0.9 2.4 MIXING RATIO (G/KG) 3.09 2.90 3.67 6.01 6.43 6.53 7.80 8.38 7.56 5.86 4.79 4.07 5.59 VAPOUR PRESSURE (HPA) 4.40 4.13 5.21 8.49 9.08 9.21 10.96 11.78 10.66 8.34 6.85 5.81 7.91 SATURATION DEF. (HPA) 2.30 2.77 5.38 10.10 15.44 23.78 30.05 27.21 18.50 8.14 3.05 1.68 12.36 RELATIVE HUMIDITY (MEAN %) 67 64 54 50 42 33 30 34 41 56 72 80 52 RELATIVE HUMIDITY (MAX. %) 83 83 76 73 64 51 44 50 61 75 87 92 70 RELATIVE HUMIDITY (MIN. %) 50 42 33 28 23 17 17 19 21 36 51 64 33 RELATIVE HUMIDITY (MEAN% 03UTC) 79 79 75 69 62 48 41 47 57 72 85 89 67 RELATIVE HUMIDITY (MEAN% 09UTC) 57 53 41 41 32 24 21 26 33 45 62 70 42 RELATIVE HUMIDITY (MEAN% 15UTC) 60 52 42 36 27 21 21 25 29 45 63 75 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 21.7 15.7 76.6 30.6 18.9 8.4 2.3 0.1 8.2 12.3 36.2 43.6 274.6 DAYS WITH PRECIPITATION >=10 1 0 2 1 1 0 0 0 0 0 1 1 7 DAYS WITH PRECIPITATION >= 5 2 1 3 3 1 1 0 0 1 1 3 3 19 DAYS WITH PRECIPITATION >= 1 3 3 5 6 4 2 1 0 2 3 5 6 40 DAYS WITH PRECIPITATION 10 6 6 12 8 4 3 2 2 8 9 9 79 GREATEST DAILY PRECIPITATION 11.0 6.9 47.0 10.0 11.0 7.0 1.8 0.1 6.0 5.1 19.0 18.0 47.0 DAY 6 14 24 20 9 1 8 10 30 24 1 26 DAY WITH THUNDER STORM 0 0 2 7 6 3 4 0 2 3 0 0 27 DAYS WITH SNOW OR SLEET 7 6 2 0 0 0 0 0 0 0 0 6 21 DAYS WITH DUST 0 0 0 0 0 0 0 0 2 0 0 0 2 WIND DIRECTION (PREVAILING) 45 45 270 270 45 45 45 45 45 45 45 90 45 PREVAILING WIND SPEED(KNOTS) 6.8 9.1 8.9 9.0 8.8 10.3 9.1 10.6 9.6 9.2 8.4 6.2 9.3 PREVAILING WIND PERCENT 12.5 8.6 14.1 12.5 17.3 27.1 35.1 39.5 30.4 20.2 6.7 4.8 17.5 CALMS PERCENT OF WIND 66.1 69.4 54.0 52.1 39.5 33.3 31.9 30.6 40.4 51.2 75.8 79.0 51.9 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 20 19 279 259 332 53 62 55 41 59 36 83 43 VECTOR WIND MAGNITUDE(KNOTS) 0.5 0.5 1.3 1.9 1.3 4.1 4.9 4.7 3.1 2.2 0.5 0.2 1.5 WIND STEADINESES (MEAN %) 22.7 23.8 38.2 51.4 27.7 70.7 81.7 72.3 66.0 59.5 33.3 15.4 39.5 WIND SPEED (MEAN KNOTS) 2.2 2.1 3.4 3.7 4.7 5.8 6.0 6.5 4.7 3.7 1.5 1.3 3.8 FASTEST WIND DIRECTION 280 60 210 270 210 60 30 60 40 180 50 260 270 FASTEST WIND SPEED (KNOTS) 23 17 23 29 25 21 23 23 27 19 17 19 29 DAY 19 7 8 10 19 14 2 5 10 26 9 21 DAYS WITH SKY CLEAR (0-2)/8 11 14 19 10 23 27 30 27 27 12 11 8 219 DAYS WITH P.CLOUDY (3-6)/8 9 10 8 14 7 3 1 4 3 15 13 15 102 DAYS WITH CLOUDY (7-8)/8 11 5 4 6 1 0 0 0 0 4 6 8 45 DAYS WITH VISIBILITY =< 2 KM 0 2 1 0 0 0 0 0 0 1 2 4 10 DURATION OF SUNSHINE HOURS 136.6 184.7 248.7 219.1 311.4 368.8 375.8 353.3 288.2 216.5 149.3 109.5 2961.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 890.7 891.9 889.1 888.6 887.0 885.8 886.2 886.4 888.2 893.2 896.0 893.3 889.7 MAX. QFE PRESSURE IN HPA 901.5 901.3 898.8 896.8 894.0 894.9 894.0 892.8 894.0 899.0 905.1 900.9 905.1 DAY-HOUR 31- 6 11- 6 27- 6 2- 6 5- 6 13- 3 30- 6 23- 6 25- 6 30- 6 17- 6 4- 6 MIN. QFE PRESSURE IN HPA 875.1 880.1 879.0 882.2 879.1 878.3 876.8 877.5 880.8 887.8 889.8 883.6 875.1 DAY-HOUR 21- 3 6-15 8-12 9-21 26-12 5-12 10-15 30-15 6-15 10-12 22-12 21- 3 MEAN QNH PRESSURE IN HPA 1017.3 1018.7 1015.5 1015.0 1013.2 1011.9 1012.2 1012.5 1014.4 1020.1 1023.2 1020.2 1016.2 MAX. QNH PRESSURE IN HPA 1029.3 1029.1 1026.3 1024.1 1021.0 1022.0 1021.0 1019.6 1021.0 1026.5 1033.3 1028.7 1033.3 DAY-HOUR 31- 6 11- 6 27- 6 2- 6 5- 6 13- 3 30- 6 23- 6 25- 6 30- 6 17- 6 4- 6 MIN. QNH PRESSURE IN HPA 999.9 1005.5 1004.3 1007.8 1004.4 1003.5 1001.8 1002.6 1006.3 1014.1 1016.3 1009.4 999.9 DAY-HOUR 21- 3 6-15 8-12 9-21 26-12 5-12 10-15 30-15 6-15 10-12 22-12 21- 3 MEAN QFF PRESSURE IN HPA 1020.7 1022.1 1015.9 1011.1 1007.4 1004.1 1002.7 1003.2 1007.3 1017.1 1023.8 1022.8 1013.2 MAX. QFF PRESSURE IN HPA 1035.4 1035.8 1029.3 1022.2 1018.3 1019.3 1011.7 1012.6 1016.2 1025.9 1035.7 1033.8 1035.8 DAY-HOUR 31- 6 10- 6 1- 3 2- 6 5- 6 13- 3 31- 3 8- 3 29- 6 30- 6 17- 6 29- 6 MIN. QFF PRESSURE IN HPA 1001.4 1007.9 1003.1 1003.4 995.8 993.1 992.2 993.8 997.9 1008.5 1016.0 1010.9 992.2 DAY-HOUR 21- 3 7- 0 8-12 14-15 26-12 5-12 10-15 30-12 6-12 10-12 22-12 21- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 891.0 892.0 889.5 888.8 887.6 886.9 886.9 887.2 888.8 893.5 896.1 893.3 890.1 MAX. QFE PRESSURE IN HPA 901.2 900.8 897.7 894.9 893.0 894.4 893.1 891.7 893.3 898.2 904.1 899.6 904.1 DAY 31 11 1 2 5 13 31 9 29 16 17 29 MIN. QFE PRESSURE IN HPA 876.9 880.5 881.3 882.7 882.9 882.5 880.2 882.1 883.2 889.9 891.3 884.9 876.9 DAY 21 7 24 10 20 19 11 3 1 12 22 21 MEAN QNH PRESSURE IN HPA 1017.6 1018.8 1016.0 1015.2 1013.8 1013.0 1013.0 1013.4 1015.2 1020.4 1023.3 1020.1 1016.7 MAX. QNH PRESSURE IN HPA 1029.0 1028.5 1025.1 1022.0 1019.9 1021.4 1020.0 1018.4 1020.2 1025.6 1032.2 1027.2 1032.2 DAY 31 11 1 2 5 13 31 9 29 16 17 29 MIN. QNH PRESSURE IN HPA 1001.9 1005.9 1006.8 1008.4 1008.6 1008.2 1005.6 1007.7 1008.9 1016.4 1018.0 1010.8 1001.9 DAY 21 7 24 10 20 19 11 3 1 12 22 21 MEAN QFF PRESSURE IN HPA 1020.6 1021.7 1016.1 1011.0 1007.9 1005.0 1003.2 1003.7 1007.4 1016.9 1023.5 1022.2 1013.3 MAX. QFF PRESSURE IN HPA 1033.7 1033.7 1029.0 1019.1 1014.4 1019.1 1010.0 1010.7 1014.5 1024.7 1032.9 1031.4 1033.7 DAY 31 11 1 2 5 13 31 8 29 16 17 29 MIN. QFF PRESSURE IN HPA 1003.9 1007.9 1004.9 1004.5 1000.9 998.2 995.1 996.9 1000.0 1011.4 1017.7 1013.3 995.1 DAY 21 7 24 21 26 19 11 3 7 12 23 22 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 890.9 892.2 890.1 889.7 888.4 887.6 887.7 888.1 889.6 894.1 896.4 893.3 890.7 MAX. QFE PRESSURE IN HPA 900.8 900.8 898.1 895.9 893.0 894.9 893.7 892.5 893.0 897.8 904.7 899.8 904.7 DAY 31 11 27 2 5 13 30 9 20 5 17 29 MIN. QFE PRESSURE IN HPA 875.1 881.1 881.1 883.8 884.1 883.4 881.4 883.0 884.0 890.8 891.3 883.6 875.1 DAY 21 7 24 10 20 26 11 31 1 12 22 21 MEAN QNH PRESSURE IN HPA 1017.5 1019.0 1016.6 1016.2 1014.7 1013.8 1014.0 1014.4 1016.0 1021.1 1023.6 1020.1 1017.2 MAX. QNH PRESSURE IN HPA 1028.5 1028.5 1025.5 1023.1 1019.9 1022.0 1020.6 1019.3 1019.9 1025.2 1032.9 1027.4 1032.9 DAY 31 11 27 2 5 13 30 9 20 5 17 29 MIN. QNH PRESSURE IN HPA 999.9 1006.6 1006.6 1009.6 1009.9 1009.2 1006.9 1008.7 1009.8 1017.4 1018.0 1009.4 999.9 DAY 21 7 24 10 20 26 11 31 1 12 22 21 MEAN QFF PRESSURE IN HPA 1021.2 1022.8 1017.6 1012.8 1009.4 1006.3 1004.8 1005.6 1009.4 1018.7 1024.7 1022.9 1014.7 MAX. QFF PRESSURE IN HPA 1034.5 1034.8 1029.3 1021.6 1016.8 1019.3 1011.7 1012.6 1014.9 1025.0 1034.9 1032.2 1034.9 DAY 31 11 1 2 5 13 31 8 29 30 17 29 MIN. QFF PRESSURE IN HPA 1001.4 1009.5 1005.9 1005.8 1002.9 1000.8 997.0 998.4 1001.8 1013.5 1018.5 1011.8 997.0 DAY 21 7 24 15 26 19 11 3 1 12 1 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 892.0 893.5 890.8 890.4 888.6 887.5 887.8 888.4 890.1 894.9 897.3 894.3 891.3 MAX. QFE PRESSURE IN HPA 901.5 901.3 898.8 896.8 894.0 894.6 894.0 892.8 894.0 899.0 905.1 900.9 905.1 DAY 31 11 27 2 5 13 30 23 25 30 17 4 MIN. QFE PRESSURE IN HPA 876.8 885.1 881.2 884.7 884.0 882.9 882.2 883.6 884.6 891.5 892.4 884.9 876.8 DAY 21 7 24 10 26 26 11 30 1 12 22 21 MEAN QNH PRESSURE IN HPA 1018.7 1020.4 1017.4 1017.0 1015.0 1013.7 1014.1 1014.7 1016.6 1021.9 1024.7 1021.3 1018.0 MAX. QNH PRESSURE IN HPA 1029.3 1029.1 1026.3 1024.1 1021.0 1021.6 1021.0 1019.6 1021.0 1026.5 1033.3 1028.7 1033.3 DAY 31 11 27 2 5 13 30 23 25 30 17 4 MIN. QNH PRESSURE IN HPA 1001.8 1011.1 1006.7 1010.6 1009.8 1008.6 1007.8 1009.4 1010.5 1018.2 1019.2 1010.8 1001.8 DAY 21 7 24 10 26 26 11 30 1 12 22 21 MEAN QFF PRESSURE IN HPA 1022.4 1024.3 1018.3 1013.4 1009.4 1006.2 1004.8 1005.7 1009.7 1019.3 1025.8 1024.3 1015.3 MAX. QFF PRESSURE IN HPA 1035.4 1035.8 1029.1 1022.2 1018.3 1018.5 1011.3 1012.1 1016.2 1025.9 1035.7 1033.8 1035.8 DAY 31 10 1 2 5 13 31 8 29 30 17 29 MIN. QFF PRESSURE IN HPA 1002.8 1014.4 1006.2 1007.3 1002.0 999.8 998.0 999.0 1002.5 1014.2 1019.9 1013.2 998.0 DAY 21 7 24 10 26 5 11 3 7 12 22 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 890.8 892.5 889.3 888.9 887.0 885.7 886.2 886.5 888.0 893.3 896.2 893.5 889.8 MAX. QFE PRESSURE IN HPA 899.9 900.7 896.6 895.2 892.0 893.0 892.3 891.1 892.5 897.6 902.9 900.5 902.9 DAY 31 29 27 2 5 13 30 8 25 15 17 29 MIN. QFE PRESSURE IN HPA 875.7 884.6 880.8 884.2 881.9 881.1 880.7 881.1 882.6 889.6 891.3 884.3 875.7 DAY 21 6 8 10 26 26 11 30 1 12 22 21 MEAN QNH PRESSURE IN HPA 1017.4 1019.3 1015.7 1015.3 1013.2 1011.8 1012.3 1012.6 1014.3 1020.2 1023.4 1020.4 1016.3 MAX. QNH PRESSURE IN HPA 1027.5 1028.4 1023.9 1022.3 1018.7 1019.9 1019.1 1017.7 1019.3 1025.0 1030.9 1028.2 1030.9 DAY 31 29 27 2 5 13 30 8 25 15 17 29 MIN. QNH PRESSURE IN HPA 1000.6 1010.5 1006.3 1010.1 1007.5 1006.6 1006.1 1006.6 1008.3 1016.1 1018.0 1010.2 1000.6 DAY 21 6 8 10 26 26 11 30 1 12 22 21 MEAN QFF PRESSURE IN HPA 1020.5 1022.5 1015.9 1011.1 1007.0 1003.8 1002.4 1003.0 1006.8 1016.9 1023.7 1022.7 1013.0 MAX. QFF PRESSURE IN HPA 1033.0 1034.2 1027.5 1019.3 1015.3 1016.4 1008.5 1009.6 1013.4 1023.2 1031.9 1033.2 1034.2 DAY 31 10 3 2 5 13 30 8 29 15 17 29 MIN. QFF PRESSURE IN HPA 1001.8 1014.4 1004.2 1005.2 998.9 996.6 996.0 996.0 999.9 1010.9 1017.8 1010.9 996.0 DAY 21 6 8 15 26 5 11 3 7 12 22 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 889.4 890.7 887.3 887.1 885.2 883.8 884.2 884.2 885.9 891.7 894.8 892.5 888.1 MAX. QFE PRESSURE IN HPA 898.5 899.4 894.7 892.4 889.5 891.3 891.0 889.5 892.1 896.9 901.1 899.5 901.1 DAY 30 10 3 2 5 13 30 8 29 15 16 29 MIN. QFE PRESSURE IN HPA 876.9 881.6 879.0 883.5 879.1 878.3 877.5 878.2 881.2 887.8 889.8 884.6 876.9 DAY 19 6 8 9 26 5 10 30 1 10 22 21 MEAN QNH PRESSURE IN HPA 1015.8 1017.3 1013.5 1013.3 1011.1 1009.6 1010.0 1010.0 1012.0 1018.4 1021.9 1019.3 1014.4 MAX. QNH PRESSURE IN HPA 1026.0 1027.0 1021.7 1019.2 1016.0 1018.0 1017.6 1016.0 1018.8 1024.2 1028.9 1027.1 1028.9 DAY 30 10 3 2 5 13 30 8 29 15 16 29 MIN. QNH PRESSURE IN HPA 1001.9 1007.2 1004.3 1009.3 1004.4 1003.5 1002.6 1003.4 1006.7 1014.1 1016.3 1010.5 1001.9 DAY 19 6 8 9 26 5 10 30 1 10 22 21 MEAN QFF PRESSURE IN HPA 1018.9 1020.2 1013.4 1009.0 1005.1 1001.6 1000.2 1000.3 1004.3 1014.9 1022.0 1021.4 1010.9 MAX. QFF PRESSURE IN HPA 1030.7 1032.5 1025.2 1016.1 1012.1 1014.6 1007.4 1008.2 1013.9 1022.2 1029.5 1031.8 1032.5 DAY 30 10 3 2 10 13 30 8 29 15 17 29 MIN. QFF PRESSURE IN HPA 1006.4 1010.5 1003.1 1004.2 995.8 993.1 992.8 993.8 997.9 1008.5 1016.0 1011.5 992.8 DAY 21 6 8 29 26 5 10 30 6 10 22 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 890.0 890.8 887.6 887.0 884.9 883.3 883.9 883.9 886.1 891.9 895.2 893.0 888.1 MAX. QFE PRESSURE IN HPA 899.1 899.6 894.6 891.7 890.1 891.3 890.9 889.4 892.3 897.6 901.9 899.2 901.9 DAY 30 10 3 2 6 12 30 8 29 15 16 28 MIN. QFE PRESSURE IN HPA 880.4 880.1 879.5 882.6 879.1 878.3 876.8 877.5 880.8 888.2 890.5 885.9 876.8 DAY 19 6 24 9 26 19 10 30 6 12 22 21 MEAN QNH PRESSURE IN HPA 1016.5 1017.4 1013.8 1013.2 1010.8 1009.0 1009.8 1009.7 1012.1 1018.6 1022.3 1019.9 1014.4 MAX. QNH PRESSURE IN HPA 1026.6 1027.2 1021.6 1018.4 1016.6 1018.0 1017.5 1015.8 1019.1 1025.0 1029.8 1026.8 1029.8 DAY 30 10 3 2 6 12 30 8 29 15 16 28 MIN. QNH PRESSURE IN HPA 1005.8 1005.5 1004.8 1008.3 1004.4 1003.5 1001.8 1002.6 1006.3 1014.5 1017.1 1011.9 1001.8 DAY 19 6 24 9 26 19 10 30 6 12 22 21 MEAN QFF PRESSURE IN HPA 1020.2 1021.2 1014.6 1009.7 1005.4 1001.4 1000.5 1000.8 1005.6 1016.2 1023.3 1022.7 1011.8 MAX. QFF PRESSURE IN HPA 1032.5 1033.8 1025.7 1016.5 1011.8 1014.5 1008.1 1008.4 1015.0 1023.4 1031.8 1031.9 1033.8 DAY 30 10 3 2 6 12 30 8 29 15 16 29 MIN. QFF PRESSURE IN HPA 1009.2 1009.6 1005.2 1003.4 996.7 994.4 992.2 993.8 998.3 1010.3 1017.5 1013.8 992.2 DAY 21 6 24 14 26 19 10 30 6 12 21 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 890.8 891.8 888.9 888.5 886.8 885.5 886.0 886.2 888.1 893.1 895.9 893.5 889.6 MAX. QFE PRESSURE IN HPA 900.6 900.8 896.0 893.7 892.6 893.9 892.4 892.0 893.4 898.2 903.0 899.8 903.0 DAY 30 10 26 1 5 12 30 8 29 15 16 29 MIN. QFE PRESSURE IN HPA 880.8 880.5 880.4 882.5 880.7 881.7 878.6 880.2 882.8 889.6 891.3 886.8 878.6 DAY 20 6 24 9 19 25 10 30 6 9 21 20 MEAN QNH PRESSURE IN HPA 1017.4 1018.5 1015.3 1014.8 1013.0 1011.5 1012.0 1012.2 1014.4 1020.0 1023.1 1020.4 1016.1 MAX. QNH PRESSURE IN HPA 1028.3 1028.5 1023.2 1020.6 1019.4 1020.9 1019.2 1018.7 1020.3 1025.6 1031.0 1027.4 1031.0 DAY 30 10 26 1 5 12 30 8 29 15 16 29 MIN. QNH PRESSURE IN HPA 1006.3 1005.9 1005.8 1008.2 1006.1 1007.3 1003.8 1005.6 1008.5 1016.1 1018.0 1012.9 1003.8 DAY 20 6 24 9 19 25 10 30 6 9 21 20 MEAN QFF PRESSURE IN HPA 1021.3 1022.4 1016.0 1011.2 1007.4 1003.9 1002.7 1003.3 1007.6 1017.4 1024.1 1023.4 1013.4 MAX. QFF PRESSURE IN HPA 1034.2 1035.2 1027.4 1018.5 1015.0 1017.5 1009.4 1011.1 1016.0 1024.3 1032.9 1032.7 1035.2 DAY 30 10 3 1 5 12 30 8 29 15 16 29 MIN. QFF PRESSURE IN HPA 1009.5 1009.7 1005.3 1005.2 999.9 998.4 994.3 995.7 1000.1 1011.8 1018.2 1015.7 994.3 DAY 20 6 23 9 26 18 10 3 6 10 21 21 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 890.9 892.1 889.3 888.8 887.5 886.6 886.8 886.9 888.8 893.5 896.1 893.4 890.0 MAX. QFE PRESSURE IN HPA 901.2 901.1 897.6 894.5 891.9 894.0 893.4 892.4 892.7 898.3 903.5 899.6 903.5 DAY 30 10 26 1 4 12 30 8 19 15 16 28 MIN. QFE PRESSURE IN HPA 879.8 880.6 880.9 882.2 881.9 882.4 879.3 881.7 883.1 889.9 891.3 886.0 879.3 DAY 20 6 24 9 19 18 10 30 6 11 21 20 MEAN QNH PRESSURE IN HPA 1017.5 1018.8 1015.7 1015.2 1013.8 1012.7 1013.0 1013.1 1015.1 1020.4 1023.3 1020.2 1016.6 MAX. QNH PRESSURE IN HPA 1029.0 1028.9 1025.0 1021.5 1018.6 1021.0 1020.3 1019.2 1019.5 1025.8 1031.6 1027.2 1031.6 DAY 30 10 26 1 4 12 30 8 19 15 16 28 MIN. QNH PRESSURE IN HPA 1005.1 1006.0 1006.4 1007.8 1007.5 1008.0 1004.6 1007.3 1008.8 1016.4 1018.0 1012.1 1004.6 DAY 20 6 24 9 19 18 10 30 6 11 21 20 MEAN QFF PRESSURE IN HPA 1020.8 1022.1 1015.8 1010.9 1007.6 1004.7 1003.0 1003.6 1007.7 1017.1 1023.7 1022.6 1013.3 MAX. QFF PRESSURE IN HPA 1034.1 1034.5 1026.5 1018.6 1014.0 1017.9 1009.8 1011.1 1014.2 1024.9 1032.4 1031.8 1034.5 DAY 30 10 3 1 10 12 30 8 29 15 16 29 MIN. QFF PRESSURE IN HPA 1007.7 1008.6 1004.8 1004.2 1001.0 998.3 994.5 996.2 999.5 1011.3 1017.9 1013.5 994.5 DAY 20 6 23 9 19 18 10 2 6 11 22 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.4 3.7 10.6 16.1 19.1 25.3 26.5 27.7 23.3 15.8 5.6 4.5 14.9 MINIMUN AIR TEMPERATURE (C) -3.5 -2.1 3.4 8.6 11.2 16.5 19.0 19.7 15.9 9.4 1.0 1.3 8.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 7 9 0 0 0 0 17 DAYS WITH MINIMUM TEMP. <=-4 11 7 0 0 0 0 0 0 0 0 6 1 25 DAYS WITH FREEZING MIN.<= 0 25 21 5 0 0 0 0 0 0 0 11 9 71 TEMPERATURE RECORDS LOWEST(C) -11.8 -7.4 -3.2 4.0 7.0 11.0 12.0 15.0 11.0 3.8 -16.6 -6.2 -16.6 DAY 28 1 12 13 19 12 19 13 20 30 20 22 MAXIMUM AIR TEMPERATURE (C) 5.7 10.7 19.2 23.9 27.5 33.8 34.3 36.4 31.7 23.8 11.0 8.7 22.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 7 26 29 31 24 1 0 0 118 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 4 0 5 TEMPERATURE RECORDS HIGHEST(C) 11.8 17.8 26.5 29.0 34.6 42.5 39.0 42.0 35.4 30.5 20.8 15.8 42.5 DAY 14 28 29 5 16 23 26 2 4 6 4 30 DIF. BETWEEN (MAX.-MIN.) (C) 9.2 12.8 15.8 15.3 16.3 17.3 15.3 16.7 15.8 14.4 10.0 7.4 13.8 MEAN DAILY TEMP. (MDT) (C) 1.1 4.3 11.3 16.3 19.4 25.2 26.6 28.1 23.8 16.6 6.0 5.0 15.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.6 13.3 131.8 175.7 219.4 91.7 0.4 0.0 0.0 633.1 HEATING DEG. DAYS(BASE 18 0C) 523.5 384.1 207.8 62.7 13.4 0.0 0.0 0.0 0.7 62.7 360.7 402.8 2018.3 DEWPOINT (MEAN C) -4.6 -4.8 0.1 2.7 4.7 5.2 9.2 8.2 5.4 2.9 -0.0 0.2 2.4 MIXING RATIO (G/KG) 3.17 3.06 4.48 5.40 6.19 6.57 8.37 8.04 6.62 5.48 4.53 4.47 5.53 VAPOUR PRESSURE (HPA) 4.53 4.36 6.35 7.64 8.73 9.25 11.75 11.30 9.36 7.79 6.45 6.37 7.82 SATURATION DEF. (HPA) 2.01 3.98 7.38 11.65 14.66 24.97 24.60 27.72 20.66 11.18 3.64 2.28 12.89 RELATIVE HUMIDITY (MEAN %) 71 57 53 46 43 31 36 33 35 46 71 75 50 RELATIVE HUMIDITY (MAX. %) 87 77 76 70 66 48 51 50 54 65 86 89 68 RELATIVE HUMIDITY (MIN. %) 51 34 31 24 22 16 22 17 18 30 54 59 32 RELATIVE HUMIDITY (MEAN% 03UTC) 82 76 73 67 61 46 49 46 50 61 81 85 65 RELATIVE HUMIDITY (MEAN% 09UTC) 61 44 43 34 29 21 27 25 28 37 62 69 40 RELATIVE HUMIDITY (MEAN% 15UTC) 64 45 39 32 30 19 27 22 25 36 66 69 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 6.8 1.7 31.4 21.2 24.1 0.0 1.0 1.0 6.0 6.7 30.2 45.1 175.2 DAYS WITH PRECIPITATION >=10 0 0 2 0 0 0 0 0 0 0 1 1 4 DAYS WITH PRECIPITATION >= 5 0 0 2 1 2 0 0 0 0 0 2 4 11 DAYS WITH PRECIPITATION >= 1 2 1 4 7 5 0 1 1 2 3 5 8 39 DAYS WITH PRECIPITATION 7 3 10 8 8 0 1 1 3 7 8 10 66 GREATEST DAILY PRECIPITATION 4.3 1.3 11.5 7.0 8.2 0.0 1.0 1.0 4.0 2.0 15.0 11.0 15.0 DAY 18 4 25 9 2 ** 18 9 23 28 18 8 DAY WITH THUNDER STORM 0 0 1 3 9 0 0 1 1 1 2 0 18 DAYS WITH SNOW OR SLEET 7 0 1 0 0 0 0 0 0 0 2 0 10 DAYS WITH DUST 0 0 0 0 0 0 0 0 1 1 0 0 2 WIND DIRECTION (PREVAILING) 45 270 45 270 45 45 45 45 45 45 45 270 45 PREVAILING WIND SPEED(KNOTS) 10.4 10.7 8.5 10.1 10.7 10.2 11.3 10.8 9.6 9.5 8.8 7.2 10.0 PREVAILING WIND PERCENT 16.1 12.9 10.5 12.9 16.9 32.9 45.6 36.7 22.1 16.9 4.2 4.4 18.5 CALMS PERCENT OF WIND 69.8 59.4 54.4 52.1 41.5 36.7 26.2 34.3 53.8 55.6 81.3 79.8 53.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 53 263 290 270 359 55 58 51 34 34 92 279 40 VECTOR WIND MAGNITUDE(KNOTS) 1.5 1.4 0.9 1.3 1.3 4.0 6.6 4.4 1.8 0.9 0.1 0.5 1.4 WIND STEADINESES (MEAN %) 62.5 45.2 25.7 35.1 26.0 66.7 89.2 69.8 47.4 24.3 7.7 41.7 35.9 WIND SPEED (MEAN KNOTS) 2.4 3.1 3.5 3.7 5.0 6.0 7.4 6.3 3.8 3.7 1.3 1.2 3.9 FASTEST WIND DIRECTION 60 240 270 210 280 70 60 320 270 270 40 260 320 FASTEST WIND SPEED (KNOTS) 23 19 23 27 23 23 23 31 17 25 25 21 31 DAY 26 21 3 5 9 10 17 9 8 13 18 30 DAYS WITH SKY CLEAR (0-2)/8 15 9 15 9 15 30 26 26 25 16 12 8 206 DAYS WITH P.CLOUDY (3-6)/8 6 15 10 15 13 0 5 5 5 13 10 10 107 DAYS WITH CLOUDY (7-8)/8 10 4 6 6 3 0 0 0 0 2 8 13 52 DAYS WITH VISIBILITY =< 2 KM 1 0 0 0 0 0 0 0 0 1 6 4 12 DURATION OF SUNSHINE HOURS 143.5 167.5 233.7 253.8 306.7 386.8 361.1 356.5 298.0 239.2 145.5 110.7 3003.0 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 895.0 890.7 889.3 888.3 886.5 885.2 885.6 886.9 889.0 892.2 893.2 893.4 889.6 MAX. QFE PRESSURE IN HPA 900.4 901.8 900.4 898.8 894.5 893.2 891.2 893.9 896.8 901.4 901.8 901.4 901.8 DAY-HOUR 27- 6 9- 6 1- 6 2- 6 18- 6 2- 6 29- 6 11- 6 19- 6 10- 6 20- 6 9-18 MIN. QFE PRESSURE IN HPA 889.6 873.0 876.7 881.0 877.1 873.6 876.9 878.4 881.5 884.2 875.9 882.2 873.0 DAY-HOUR 19-12 21- 3 25- 3 12- 9 29-12 17-12 9-15 29-15 5-15 25-12 18- 3 20- 3 MEAN QNH PRESSURE IN HPA 1022.0 1017.3 1015.7 1014.7 1012.6 1011.1 1011.6 1013.0 1015.4 1018.9 1020.0 1020.3 1016.1 MAX. QNH PRESSURE IN HPA 1028.1 1029.7 1028.1 1026.3 1021.5 1020.1 1017.9 1020.9 1024.1 1029.2 1029.7 1029.2 1029.7 DAY-HOUR 27- 6 9- 6 1- 6 2- 6 18- 6 2- 6 29- 6 11- 6 19- 6 10- 6 20- 6 9-18 MIN. QNH PRESSURE IN HPA 1016.1 997.6 1001.7 1006.5 1002.1 998.2 1001.9 1003.6 1007.0 1010.1 1000.8 1007.8 997.6 DAY-HOUR 19-12 21- 3 25- 3 12- 9 29-12 17-12 9-15 29-15 5-15 25-12 18- 3 20- 3 MEAN QFF PRESSURE IN HPA 1025.8 1019.4 1014.4 1010.7 1007.1 1003.0 1002.9 1003.8 1008.2 1015.1 1021.1 1021.9 1012.8 MAX. QFF PRESSURE IN HPA 1035.5 1033.6 1030.4 1023.2 1017.5 1013.8 1009.4 1013.5 1019.5 1027.2 1039.5 1033.6 1039.5 DAY-HOUR 30- 6 9- 6 11- 6 2- 6 18- 6 11- 3 22- 3 12- 3 19-18 27- 6 20- 6 22- 6 MIN. QFF PRESSURE IN HPA 1018.1 998.0 998.5 1002.0 994.9 988.5 991.6 995.0 999.3 1003.8 998.2 1008.6 988.5 DAY-HOUR 18- 0 21- 3 24-21 26-12 29-12 17-12 9-15 30-12 5-15 6-12 18- 3 20- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 895.0 890.8 889.5 888.9 887.2 886.2 886.5 887.7 889.6 892.4 893.1 893.6 890.0 MAX. QFE PRESSURE IN HPA 899.1 900.4 897.6 897.8 892.9 891.6 889.7 893.1 895.4 899.5 900.0 900.8 900.8 DAY 31 9 11 2 19 2 16 11 19 10 20 10 MIN. QFE PRESSURE IN HPA 890.3 874.7 877.3 883.6 880.0 878.3 881.9 882.8 884.9 886.8 878.0 882.9 874.7 DAY 18 21 25 12 9 18 9 30 5 19 18 20 MEAN QNH PRESSURE IN HPA 1022.0 1017.4 1016.0 1015.3 1013.4 1012.2 1012.6 1014.0 1016.1 1019.2 1020.0 1020.5 1016.6 MAX. QNH PRESSURE IN HPA 1026.6 1028.1 1025.0 1025.2 1019.7 1018.3 1016.2 1020.0 1022.5 1027.1 1027.6 1028.5 1028.5 DAY 31 9 11 2 19 2 16 11 19 10 20 10 MIN. QNH PRESSURE IN HPA 1016.8 999.5 1002.4 1009.4 1005.4 1003.5 1007.5 1008.5 1010.8 1012.9 1003.1 1008.6 999.5 DAY 18 21 25 12 9 18 9 30 5 19 18 20 MEAN QFF PRESSURE IN HPA 1025.2 1018.9 1014.1 1010.9 1007.7 1003.9 1003.6 1004.3 1008.4 1014.9 1020.7 1021.7 1012.9 MAX. QFF PRESSURE IN HPA 1032.8 1029.8 1027.4 1021.4 1015.6 1012.6 1008.1 1012.6 1018.5 1024.7 1036.2 1030.2 1036.2 DAY 27 9 11 2 19 11 16 12 20 27 20 22 MIN. QFF PRESSURE IN HPA 1018.1 999.0 998.5 1004.0 999.9 993.5 997.4 998.8 1002.3 1007.9 1000.4 1008.6 993.5 DAY 18 21 25 12 30 18 9 30 5 19 18 20 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 895.2 891.2 890.2 889.6 888.0 887.1 887.2 888.6 890.4 893.0 893.5 893.6 890.6 MAX. QFE PRESSURE IN HPA 899.1 900.5 899.0 898.2 894.3 892.9 890.8 893.5 896.2 900.6 900.3 900.1 900.6 DAY 28 9 1 2 18 2 28 11 19 10 2 9 MIN. QFE PRESSURE IN HPA 890.5 873.0 876.7 883.4 880.7 879.1 882.6 883.7 886.1 887.7 875.9 882.2 873.0 DAY 18 21 25 12 9 17 9 30 5 19 18 20 MEAN QNH PRESSURE IN HPA 1022.3 1017.8 1016.7 1016.1 1014.3 1013.3 1013.4 1015.0 1017.0 1019.9 1020.4 1020.5 1017.2 MAX. QNH PRESSURE IN HPA 1026.6 1028.2 1026.5 1025.6 1021.3 1019.7 1017.4 1020.4 1023.4 1028.3 1028.0 1027.8 1028.3 DAY 28 9 1 2 18 2 28 11 19 10 2 9 MIN. QNH PRESSURE IN HPA 1017.1 997.6 1001.7 1009.2 1006.1 1004.4 1008.3 1009.5 1012.2 1014.0 1000.8 1007.8 997.6 DAY 18 21 25 12 9 17 9 30 5 19 18 20 MEAN QFF PRESSURE IN HPA 1026.5 1020.5 1015.9 1012.5 1009.2 1005.3 1005.0 1006.1 1010.3 1016.6 1021.9 1022.4 1014.3 MAX. QFF PRESSURE IN HPA 1034.8 1031.7 1029.6 1022.7 1017.2 1013.8 1009.4 1013.5 1019.2 1025.7 1037.8 1032.4 1037.8 DAY 28 9 11 2 19 11 22 12 20 27 20 22 MIN. QFF PRESSURE IN HPA 1018.9 998.0 999.0 1004.8 1002.1 995.6 998.6 1000.5 1003.8 1009.7 998.2 1008.7 995.6 DAY 18 21 25 12 9 17 9 30 5 6 18 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 896.2 892.2 891.1 890.1 887.9 886.8 887.1 888.9 891.1 894.0 894.4 894.5 891.2 MAX. QFE PRESSURE IN HPA 900.4 901.8 900.4 898.8 894.5 893.2 891.2 893.9 896.8 901.4 901.8 901.0 901.8 DAY 27 9 1 2 18 2 29 11 19 10 20 9 MIN. QFE PRESSURE IN HPA 890.8 873.8 877.8 882.6 880.8 878.8 882.1 884.3 886.3 888.7 876.4 884.4 873.8 DAY 19 21 25 12 9 17 9 30 5 6 18 20 MEAN QNH PRESSURE IN HPA 1023.4 1018.9 1017.7 1016.6 1014.2 1013.0 1013.3 1015.3 1017.7 1020.9 1021.5 1021.5 1017.8 MAX. QNH PRESSURE IN HPA 1028.1 1029.7 1028.1 1026.3 1021.5 1020.1 1017.9 1020.9 1024.1 1029.2 1029.7 1028.8 1029.7 DAY 27 9 1 2 18 2 29 11 19 10 20 9 MIN. QNH PRESSURE IN HPA 1017.4 998.5 1002.9 1008.3 1006.3 1004.0 1007.7 1010.2 1012.4 1015.1 1001.4 1010.3 998.5 DAY 19 21 25 12 9 17 9 30 5 6 18 20 MEAN QFF PRESSURE IN HPA 1027.8 1021.6 1016.9 1012.8 1009.0 1005.1 1004.9 1006.4 1010.7 1017.4 1022.9 1023.5 1014.9 MAX. QFF PRESSURE IN HPA 1035.5 1033.6 1030.4 1023.2 1017.5 1013.4 1008.1 1013.4 1019.3 1027.2 1039.5 1033.6 1039.5 DAY 30 9 11 2 18 2 29 11 19 27 20 22 MIN. QFF PRESSURE IN HPA 1020.2 999.1 1000.9 1003.7 1000.5 995.1 998.3 1001.3 1004.2 1009.2 1000.5 1010.4 995.1 DAY 19 21 25 12 29 17 9 30 5 6 18 20 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 895.4 891.2 889.7 888.4 886.3 885.1 885.4 887.0 889.3 892.2 893.3 893.5 889.7 MAX. QFE PRESSURE IN HPA 899.6 901.2 898.8 897.3 893.1 891.3 889.3 892.5 895.3 899.6 900.8 900.8 901.2 DAY 27 9 1 1 18 2 29 11 19 10 20 9 MIN. QFE PRESSURE IN HPA 890.3 874.3 879.0 881.0 879.0 875.9 880.4 881.4 884.7 886.0 878.7 884.7 874.3 DAY 19 21 24 12 29 17 9 30 5 25 18 5 MEAN QNH PRESSURE IN HPA 1022.5 1017.8 1016.2 1014.7 1012.4 1011.0 1011.4 1013.2 1015.7 1019.0 1020.2 1020.4 1016.2 MAX. QNH PRESSURE IN HPA 1027.2 1029.0 1026.3 1024.6 1020.0 1018.0 1015.7 1019.3 1022.4 1027.2 1028.5 1028.5 1029.0 DAY 27 9 1 1 18 2 29 11 19 10 20 9 MIN. QNH PRESSURE IN HPA 1016.8 999.0 1004.3 1006.5 1004.3 1000.8 1005.8 1006.9 1010.6 1012.1 1003.9 1010.6 999.0 DAY 19 21 24 12 29 17 9 30 5 25 18 5 MEAN QFF PRESSURE IN HPA 1025.9 1019.5 1014.5 1010.4 1006.6 1002.7 1002.4 1003.7 1008.1 1014.7 1021.0 1021.8 1012.6 MAX. QFF PRESSURE IN HPA 1033.6 1031.1 1028.2 1021.0 1016.0 1011.3 1006.0 1011.5 1017.1 1024.2 1038.4 1031.2 1038.4 DAY 30 9 11 1 18 11 15 11 19 27 20 9 MIN. QFF PRESSURE IN HPA 1019.1 999.6 1000.0 1002.3 995.7 990.9 996.0 997.6 1002.0 1005.1 1003.2 1010.9 990.9 DAY 19 21 24 12 29 17 9 30 5 6 17 20 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 893.9 889.3 887.5 886.6 884.6 883.0 883.6 884.7 887.1 890.6 892.1 892.4 887.9 MAX. QFE PRESSURE IN HPA 898.0 899.4 896.9 895.3 891.0 889.2 887.5 890.9 893.7 897.1 899.2 900.2 900.2 DAY 30 9 11 1 18 11 29 11 19 9 20 9 MIN. QFE PRESSURE IN HPA 889.6 874.5 877.8 881.9 877.1 873.6 878.0 879.2 882.4 884.2 878.8 883.9 873.6 DAY 19 21 24 12 29 17 9 30 5 25 17 5 MEAN QNH PRESSURE IN HPA 1020.9 1015.8 1013.8 1012.7 1010.5 1008.7 1009.4 1010.6 1013.3 1017.1 1018.9 1019.2 1014.2 MAX. QNH PRESSURE IN HPA 1025.4 1027.0 1024.2 1022.4 1017.6 1015.6 1013.7 1017.5 1020.6 1024.4 1026.8 1027.9 1027.9 DAY 30 9 11 1 18 11 29 11 19 9 20 9 MIN. QNH PRESSURE IN HPA 1016.1 999.2 1002.9 1007.5 1002.1 998.2 1003.1 1004.5 1008.0 1010.1 1004.0 1009.7 998.2 DAY 19 21 24 12 29 17 9 30 5 25 17 5 MEAN QFF PRESSURE IN HPA 1024.0 1017.1 1011.7 1008.3 1004.8 1000.4 1000.3 1001.0 1005.6 1012.8 1019.6 1020.3 1010.5 MAX. QFF PRESSURE IN HPA 1031.5 1028.8 1026.1 1018.3 1013.3 1010.1 1004.6 1009.9 1015.6 1022.7 1036.6 1030.2 1036.6 DAY 27 9 11 1 18 11 15 11 19 27 20 9 MIN. QFF PRESSURE IN HPA 1018.1 1000.2 999.1 1002.0 994.9 988.5 992.9 995.0 999.5 1003.8 1002.2 1010.1 988.5 DAY 19 21 24 26 29 17 9 30 5 6 17 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 894.2 889.8 887.8 886.6 884.6 882.7 883.3 884.3 887.0 890.8 892.6 892.9 888.0 MAX. QFE PRESSURE IN HPA 898.8 899.6 896.0 895.2 890.6 889.5 887.5 890.6 894.4 897.0 899.1 900.7 900.7 DAY 30 10 1 1 18 12 15 11 19 9 20 9 MIN. QFE PRESSURE IN HPA 890.4 877.2 878.9 882.3 878.4 873.6 876.9 878.4 881.5 884.3 879.2 885.1 873.6 DAY 19 21 24 19 7 17 9 29 5 25 17 5 MEAN QNH PRESSURE IN HPA 1021.2 1016.3 1014.1 1012.7 1010.5 1008.3 1009.0 1010.2 1013.2 1017.4 1019.4 1019.8 1014.3 MAX. QNH PRESSURE IN HPA 1026.3 1027.2 1023.2 1022.3 1017.2 1016.0 1013.7 1017.2 1021.4 1024.3 1026.6 1028.4 1028.4 DAY 30 10 1 1 18 12 15 11 19 9 20 9 MIN. QNH PRESSURE IN HPA 1017.0 1002.3 1004.1 1007.9 1003.6 998.2 1001.9 1003.6 1007.0 1010.2 1004.5 1011.1 998.2 DAY 19 21 24 19 7 17 9 29 5 25 17 5 MEAN QFF PRESSURE IN HPA 1025.4 1018.8 1013.0 1009.1 1005.3 1000.3 1000.5 1001.3 1006.4 1014.2 1020.9 1021.6 1011.4 MAX. QFF PRESSURE IN HPA 1033.8 1029.9 1026.2 1019.1 1013.7 1010.6 1006.1 1010.0 1017.6 1024.5 1037.6 1030.9 1037.6 DAY 30 9 10 1 18 11 21 11 19 27 20 22 MIN. QFF PRESSURE IN HPA 1019.3 1004.7 1001.6 1003.4 998.3 989.4 991.6 995.4 999.3 1005.3 1003.7 1011.8 989.4 DAY 19 21 24 26 28 17 9 29 5 25 17 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 894.9 890.7 889.2 888.1 886.3 884.9 885.4 886.4 888.6 892.1 893.2 893.4 889.4 MAX. QFE PRESSURE IN HPA 899.1 899.9 897.7 897.3 892.1 891.6 889.8 892.8 896.2 898.3 899.0 901.4 901.4 DAY 30 9 10 1 18 12 15 11 19 9 19 9 MIN. QFE PRESSURE IN HPA 891.4 878.7 879.8 884.4 879.4 875.7 879.3 880.9 883.9 885.7 879.3 885.1 875.7 DAY 3 20 24 26 7 17 9 29 5 25 17 4 MEAN QNH PRESSURE IN HPA 1022.0 1017.3 1015.6 1014.4 1012.4 1010.8 1011.4 1012.5 1015.0 1018.8 1020.0 1020.3 1015.9 MAX. QNH PRESSURE IN HPA 1026.6 1027.5 1025.1 1024.6 1018.8 1018.3 1016.3 1019.6 1023.4 1025.8 1026.5 1029.2 1029.2 DAY 30 9 10 1 18 12 15 11 19 9 19 9 MIN. QNH PRESSURE IN HPA 1018.1 1003.9 1005.1 1010.3 1004.7 1000.6 1004.6 1006.4 1009.7 1011.7 1004.6 1011.1 1000.6 DAY 3 20 24 26 7 17 9 29 5 25 17 4 MEAN QFF PRESSURE IN HPA 1026.3 1019.9 1014.7 1010.6 1007.2 1002.9 1002.9 1003.6 1008.1 1015.3 1021.5 1022.2 1012.9 MAX. QFF PRESSURE IN HPA 1033.7 1030.8 1027.9 1021.9 1015.2 1012.8 1008.2 1012.5 1019.5 1024.9 1036.8 1031.5 1036.8 DAY 30 9 10 1 18 12 15 11 19 26 20 9 MIN. QFF PRESSURE IN HPA 1020.7 1004.6 1002.0 1005.8 998.5 991.2 994.9 997.6 1001.6 1007.1 1003.3 1011.8 991.2 DAY 4 20 24 26 29 17 9 29 5 25 17 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 895.1 890.9 889.5 888.6 887.0 885.9 886.3 887.4 889.3 892.4 893.2 893.4 889.9 MAX. QFE PRESSURE IN HPA 899.3 900.3 897.8 897.9 892.9 891.7 890.2 893.2 896.0 898.9 899.6 900.8 900.8 DAY 26 8 10 1 18 11 15 11 19 9 19 9 MIN. QFE PRESSURE IN HPA 891.1 877.0 877.6 884.1 880.1 877.4 881.2 882.4 884.6 886.4 878.6 883.9 877.0 DAY 17 20 24 11 29 17 9 29 4 25 17 4 MEAN QNH PRESSURE IN HPA 1022.2 1017.5 1015.9 1015.0 1013.1 1012.0 1012.4 1013.6 1015.7 1019.1 1020.0 1020.3 1016.4 MAX. QNH PRESSURE IN HPA 1026.9 1028.0 1025.2 1025.3 1019.7 1018.4 1016.7 1020.1 1023.2 1026.4 1027.2 1028.5 1028.5 DAY 26 8 10 1 18 11 15 11 19 9 19 9 MIN. QNH PRESSURE IN HPA 1017.7 1002.0 1002.7 1009.9 1005.5 1002.5 1006.7 1008.0 1010.5 1012.5 1003.8 1009.7 1002.0 DAY 17 20 24 11 29 17 9 29 4 25 17 4 MEAN QFF PRESSURE IN HPA 1025.6 1019.1 1014.2 1010.7 1007.4 1003.6 1003.4 1004.2 1008.2 1014.9 1020.9 1021.6 1012.8 MAX. QFF PRESSURE IN HPA 1033.1 1029.8 1028.2 1022.1 1015.8 1012.6 1008.5 1012.8 1019.1 1024.4 1035.4 1030.4 1035.4 DAY 27 8 10 1 18 11 15 11 19 26 19 9 MIN. QFF PRESSURE IN HPA 1019.7 1001.5 998.5 1004.2 998.1 992.5 996.8 998.6 1001.9 1006.9 1001.0 1009.7 992.5 DAY 17 20 24 25 29 17 9 29 4 25 17 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.1 3.5 9.3 12.2 17.1 23.9 26.7 26.7 24.5 18.5 8.0 -2.2 13.9 MINIMUN AIR TEMPERATURE (C) -4.4 -1.6 2.4 7.2 10.2 14.8 19.0 18.7 15.7 11.4 2.9 -4.6 7.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 7 4 0 0 0 0 12 DAYS WITH MINIMUM TEMP. <=-4 18 9 2 0 0 0 0 0 0 0 0 14 43 DAYS WITH FREEZING MIN.<= 0 25 20 7 0 0 0 0 0 0 0 6 24 82 TEMPERATURE RECORDS LOWEST(C) -13.0 -7.4 -4.6 3.0 5.8 9.8 15.0 14.4 12.6 4.6 -2.8 -13.8 -13.8 DAY 31 19 1 13 14 8 2 31 16 23 24 28 MAXIMUM AIR TEMPERATURE (C) 3.2 9.8 17.1 17.9 24.3 32.4 35.0 35.1 33.7 26.4 14.3 1.2 20.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 6 23 30 31 30 8 0 0 128 DAYS WITH MAXIMUM TEMP. <= 0 6 0 0 0 0 0 0 0 0 0 0 15 21 TEMPERATURE RECORDS HIGHEST(C) 14.2 16.6 24.4 26.0 33.4 38.2 38.6 39.0 36.8 33.4 23.6 10.5 39.0 DAY 3 22 26 28 24 27 14 5 7 9 11 6 DIF. BETWEEN (MAX.-MIN.) (C) 7.6 11.4 14.7 10.7 14.1 17.6 16.0 16.4 18.0 15.0 11.4 5.8 13.3 MEAN DAILY TEMP. (MDT) (C) -0.6 4.1 9.7 12.6 17.3 23.6 27.0 26.9 24.7 18.9 8.6 -1.7 14.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 9.9 83.8 185.3 182.5 110.0 14.1 0.0 0.0 585.7 HEATING DEG. DAYS(BASE 18 0C) 576.7 388.8 256.0 164.0 59.3 0.0 0.0 0.0 0.0 29.0 281.9 610.4 2366.2 DEWPOINT (MEAN C) -5.3 -3.5 -1.8 4.6 6.6 4.3 9.3 7.7 4.5 4.2 1.5 -5.4 2.2 MIXING RATIO (G/KG) 3.06 3.46 3.92 6.14 7.01 6.12 8.47 7.90 6.32 5.93 4.90 3.08 5.53 VAPOUR PRESSURE (HPA) 4.37 4.93 5.57 8.66 9.90 8.63 11.90 11.10 8.94 8.42 6.99 4.38 7.81 SATURATION DEF. (HPA) 1.64 3.39 6.95 6.06 10.89 22.88 24.76 25.85 23.55 14.11 4.28 1.14 12.12 RELATIVE HUMIDITY (MEAN %) 75 63 51 63 55 32 36 35 31 42 66 79 52 RELATIVE HUMIDITY (MAX. %) 87 82 74 84 77 51 55 53 49 61 86 89 71 RELATIVE HUMIDITY (MIN. %) 59 42 30 42 34 15 20 18 15 25 45 68 34 RELATIVE HUMIDITY (MEAN% 03UTC) 82 76 71 81 75 47 52 49 47 58 83 83 67 RELATIVE HUMIDITY (MEAN% 09UTC) 67 54 41 54 43 21 25 27 26 34 54 72 43 RELATIVE HUMIDITY (MEAN% 15UTC) 71 53 36 50 41 19 28 23 18 31 58 79 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 32.4 10.2 20.3 89.8 39.4 0.0 32.5 0.0 0.2 2.0 39.9 86.6 353.3 DAYS WITH PRECIPITATION >=10 0 0 1 3 2 0 1 0 0 0 2 4 13 DAYS WITH PRECIPITATION >= 5 2 1 1 5 3 0 2 0 0 0 3 4 21 DAYS WITH PRECIPITATION >= 1 6 3 3 13 6 0 4 0 0 1 5 12 53 DAYS WITH PRECIPITATION 8 7 8 17 12 0 5 0 1 4 6 15 83 GREATEST DAILY PRECIPITATION 9.5 7.5 12.2 23.0 13.0 0.0 20.0 0.0 0.2 1.0 16.0 19.0 23.0 DAY 7 13 18 2 21 ** 9 ** 22 20 25 8 DAY WITH THUNDER STORM 0 0 1 8 11 1 6 0 1 1 0 0 29 DAYS WITH SNOW OR SLEET 5 3 0 0 0 0 0 0 0 0 1 12 21 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 45 225 270 270 45 45 45 45 45 270 315 45 45 PREVAILING WIND SPEED(KNOTS) 8.0 10.3 9.3 10.3 8.2 9.9 9.5 10.0 6.9 8.5 3.6 7.5 8.8 PREVAILING WIND PERCENT 4.4 7.6 8.1 12.1 20.2 20.8 36.3 30.2 16.7 7.7 6.3 8.9 14.1 CALMS PERCENT OF WIND 81.9 70.1 66.5 53.8 50.8 36.7 45.6 46.0 68.3 71.0 80.8 79.0 62.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 316 261 245 281 13 21 54 49 29 305 28 17 24 VECTOR WIND MAGNITUDE(KNOTS) 0.3 1.0 0.8 1.2 1.6 1.6 4.2 3.4 1.0 0.4 0.4 0.7 0.9 WIND STEADINESES (MEAN %) 25.0 41.7 29.6 29.3 39.0 28.6 85.7 73.9 50.0 21.1 40.0 53.8 30.0 WIND SPEED (MEAN KNOTS) 1.2 2.4 2.7 4.1 4.1 5.6 4.9 4.6 2.0 1.9 1.0 1.3 3.0 FASTEST WIND DIRECTION 60 230 260 240 240 230 60 60 40 280 50 60 230 FASTEST WIND SPEED (KNOTS) 16 29 23 29 27 25 21 19 16 27 16 12 29 DAY 11 26 27 25 24 6 20 10 1 21 13 2 DAYS WITH SKY CLEAR (0-2)/8 7 16 11 3 15 26 29 31 30 17 16 7 208 DAYS WITH P.CLOUDY (3-6)/8 17 8 10 14 11 4 2 0 0 12 6 9 93 DAYS WITH CLOUDY (7-8)/8 7 4 10 13 5 0 0 0 0 2 8 15 64 DAYS WITH VISIBILITY =< 2 KM 3 1 0 1 0 0 0 0 0 0 0 5 10 DURATION OF SUNSHINE HOURS 110.6 203.3 214.9 182.7 309.6 360.6 355.1 367.5 324.5 230.4 188.7 81.9 2929.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 893.6 893.0 889.5 886.5 887.7 885.8 886.5 885.3 889.7 892.2 895.3 892.8 889.8 MAX. QFE PRESSURE IN HPA 906.1 905.3 903.1 896.2 896.0 894.6 893.3 893.5 896.6 898.8 905.1 904.7 906.1 DAY-HOUR 27- 6 6- 6 10- 6 1- 6 17- 3 25- 3 29- 3 31- 3 21- 6 11- 6 18- 6 3- 6 MIN. QFE PRESSURE IN HPA 880.2 879.6 878.2 876.5 879.9 875.4 878.4 876.1 882.4 884.5 885.7 875.9 875.4 DAY-HOUR 7-21 26-15 28-12 3-12 24-12 19-15 24-15 7-15 10-15 21-12 12- 0 21- 0 MEAN QNH PRESSURE IN HPA 1020.5 1019.9 1016.0 1012.6 1014.0 1011.9 1012.6 1011.2 1016.1 1019.0 1022.4 1019.7 1016.3 MAX. QNH PRESSURE IN HPA 1034.4 1033.6 1031.1 1023.4 1023.2 1021.6 1020.2 1020.4 1023.9 1026.3 1033.3 1032.9 1034.4 DAY-HOUR 27- 6 6- 6 10- 6 1- 6 17- 3 25- 3 29- 3 31- 3 21- 6 11- 6 18- 6 3- 6 MIN. QNH PRESSURE IN HPA 1005.6 1004.9 1003.4 1001.5 1005.3 1000.2 1003.6 1001.0 1008.0 1010.4 1011.7 1000.8 1000.2 DAY-HOUR 7-21 26-15 28-12 3-12 24-12 19-15 24-15 7-15 10-15 21-12 12- 0 21- 0 MEAN QFF PRESSURE IN HPA 1025.0 1022.0 1015.2 1010.3 1009.4 1004.3 1003.8 1002.4 1008.4 1013.9 1022.3 1024.7 1013.5 MAX. QFF PRESSURE IN HPA 1043.3 1038.2 1033.1 1022.4 1021.0 1015.6 1012.7 1014.6 1017.3 1023.7 1034.9 1039.0 1043.3 DAY-HOUR 27- 6 6- 6 10- 6 1- 6 17- 3 25- 3 29- 3 31- 3 21- 6 23- 6 18- 6 14- 6 MIN. QFF PRESSURE IN HPA 1006.5 1003.8 998.4 999.5 998.3 992.0 994.3 991.0 1000.5 1005.7 1008.4 1003.3 991.0 DAY-HOUR 7-21 26-12 27- 0 25- 9 24-12 19-15 24- 9 7-15 10-12 21-12 11-12 21- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 893.7 892.9 889.9 886.9 888.3 886.6 887.2 886.2 890.2 892.6 895.4 892.8 890.2 MAX. QFE PRESSURE IN HPA 904.9 903.8 901.5 893.8 895.0 893.9 892.6 892.5 894.5 897.4 903.0 903.2 904.9 DAY 27 6 11 1 17 25 29 31 21 11 18 3 MIN. QFE PRESSURE IN HPA 882.0 881.5 878.6 878.1 883.5 878.4 880.8 880.1 885.7 887.4 885.7 875.9 875.9 DAY 8 25 27 4 29 20 24 17 11 30 12 21 MEAN QNH PRESSURE IN HPA 1020.6 1019.8 1016.4 1013.0 1014.7 1012.7 1013.4 1012.2 1016.8 1019.4 1022.6 1019.7 1016.8 MAX. QNH PRESSURE IN HPA 1033.1 1031.9 1029.3 1020.7 1022.1 1020.9 1019.4 1019.3 1021.5 1024.8 1031.0 1031.2 1033.1 DAY 27 6 11 1 17 25 29 31 21 11 18 3 MIN. QNH PRESSURE IN HPA 1007.6 1007.0 1003.8 1003.3 1009.3 1003.6 1006.3 1005.5 1011.7 1013.6 1011.7 1000.8 1000.8 DAY 8 25 27 4 29 20 24 17 11 30 12 21 MEAN QFF PRESSURE IN HPA 1024.7 1021.5 1015.2 1010.5 1009.9 1005.0 1004.3 1003.0 1008.6 1013.7 1021.8 1024.4 1013.6 MAX. QFF PRESSURE IN HPA 1040.6 1035.5 1031.0 1019.9 1018.9 1014.2 1011.1 1012.3 1013.7 1022.1 1031.5 1036.4 1040.6 DAY 27 6 11 1 17 25 29 31 21 23 18 30 MIN. QFF PRESSURE IN HPA 1008.6 1005.3 998.4 1002.2 1001.7 994.5 996.6 995.5 1003.4 1008.1 1008.5 1003.3 994.5 DAY 8 25 27 4 29 20 24 17 8 30 12 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 893.6 893.3 890.5 887.2 889.0 887.4 888.0 887.0 891.3 893.1 895.8 892.7 890.8 MAX. QFE PRESSURE IN HPA 905.3 904.3 901.9 895.0 896.0 894.6 893.3 893.5 895.4 897.9 903.4 903.2 905.3 DAY 27 6 11 1 17 25 29 31 21 11 18 3 MIN. QFE PRESSURE IN HPA 882.3 882.5 881.4 878.7 884.4 879.4 881.0 881.3 887.3 887.5 886.1 876.1 876.1 DAY 8 25 22 4 29 20 24 17 11 30 12 21 MEAN QNH PRESSURE IN HPA 1020.6 1020.2 1017.1 1013.4 1015.4 1013.6 1014.2 1013.2 1017.9 1020.0 1023.0 1019.6 1017.4 MAX. QNH PRESSURE IN HPA 1033.6 1032.4 1029.8 1022.1 1023.2 1021.6 1020.2 1020.4 1022.5 1025.3 1031.4 1031.2 1033.6 DAY 27 6 11 1 17 25 29 31 21 11 18 3 MIN. QNH PRESSURE IN HPA 1007.9 1008.2 1006.9 1003.9 1010.3 1004.7 1006.5 1006.8 1013.5 1013.7 1012.2 1001.0 1001.0 DAY 8 25 22 4 29 20 24 17 11 30 12 21 MEAN QFF PRESSURE IN HPA 1025.4 1022.8 1016.7 1011.4 1011.2 1006.3 1006.0 1004.7 1010.7 1015.5 1023.3 1024.8 1014.9 MAX. QFF PRESSURE IN HPA 1042.0 1037.1 1032.5 1021.9 1021.0 1015.6 1012.7 1014.6 1015.5 1023.2 1033.4 1036.8 1042.0 DAY 27 6 11 1 17 25 29 31 21 23 18 14 MIN. QFF PRESSURE IN HPA 1009.5 1007.3 1002.7 1003.3 1003.2 996.0 998.8 997.5 1006.5 1009.5 1010.1 1004.2 996.0 DAY 8 25 27 4 29 20 24 17 11 30 12 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 894.8 894.5 891.3 887.6 889.3 887.3 888.1 887.2 892.0 894.1 897.0 893.8 891.4 MAX. QFE PRESSURE IN HPA 906.1 905.3 903.1 896.2 895.9 894.2 893.1 893.3 896.6 898.8 905.1 904.7 906.1 DAY 27 6 10 1 17 24 29 31 21 11 18 3 MIN. QFE PRESSURE IN HPA 883.5 883.2 881.5 879.7 884.1 880.1 880.8 881.7 887.8 889.2 887.1 877.3 877.3 DAY 8 25 22 3 29 19 24 17 10 21 12 21 MEAN QNH PRESSURE IN HPA 1021.8 1021.5 1018.0 1013.8 1015.7 1013.5 1014.4 1013.4 1018.7 1021.1 1024.3 1020.8 1018.1 MAX. QNH PRESSURE IN HPA 1034.4 1033.6 1031.1 1023.4 1023.1 1021.2 1020.0 1020.2 1023.9 1026.3 1033.3 1032.9 1034.4 DAY 27 6 10 1 17 24 29 31 21 11 18 3 MIN. QNH PRESSURE IN HPA 1009.3 1008.9 1007.0 1005.0 1009.9 1005.5 1006.3 1007.3 1014.1 1015.6 1013.3 1002.4 1002.4 DAY 8 25 22 3 29 19 24 17 10 21 12 21 MEAN QFF PRESSURE IN HPA 1026.7 1024.1 1017.7 1011.6 1011.3 1006.1 1005.7 1004.7 1011.3 1016.4 1024.5 1026.1 1015.5 MAX. QFF PRESSURE IN HPA 1043.3 1038.2 1033.1 1022.4 1020.4 1014.4 1012.2 1014.2 1017.3 1023.7 1034.9 1039.0 1043.3 DAY 27 6 10 1 17 25 29 31 21 23 18 14 MIN. QFF PRESSURE IN HPA 1011.0 1008.2 1005.1 1003.7 1002.3 996.7 997.9 997.1 1006.9 1010.9 1011.6 1005.1 996.7 DAY 8 25 27 25 29 19 24 17 10 3 12 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 893.9 893.7 889.8 886.4 887.8 885.6 886.3 885.3 890.0 892.3 895.6 892.9 890.0 MAX. QFE PRESSURE IN HPA 905.7 904.0 902.9 894.6 894.5 893.1 891.5 890.8 894.6 896.6 903.6 903.0 905.7 DAY 27 6 10 1 17 24 29 30 21 10 18 3 MIN. QFE PRESSURE IN HPA 883.5 882.3 879.2 877.2 882.3 878.1 878.5 879.4 885.4 886.4 886.7 876.2 876.2 DAY 8 25 28 3 24 19 24 15 10 21 12 21 MEAN QNH PRESSURE IN HPA 1020.9 1020.7 1016.3 1012.5 1014.1 1011.6 1012.4 1011.2 1016.5 1019.1 1022.8 1019.7 1016.5 MAX. QNH PRESSURE IN HPA 1034.0 1032.1 1030.9 1021.6 1021.5 1020.0 1018.2 1017.4 1021.6 1023.9 1031.7 1031.0 1034.0 DAY 27 6 10 1 17 24 29 30 21 10 18 3 MIN. QNH PRESSURE IN HPA 1009.3 1007.9 1004.5 1002.3 1007.9 1003.3 1003.7 1004.7 1011.4 1012.5 1012.8 1001.1 1001.1 DAY 8 25 28 3 24 19 24 15 10 21 12 21 MEAN QFF PRESSURE IN HPA 1025.2 1022.7 1015.3 1009.9 1009.3 1003.8 1003.2 1002.1 1008.4 1013.6 1022.3 1024.6 1013.4 MAX. QFF PRESSURE IN HPA 1042.2 1035.8 1032.8 1020.0 1018.3 1012.4 1009.6 1010.7 1014.3 1020.2 1032.3 1036.4 1042.2 DAY 27 6 10 1 17 24 29 31 21 23 18 14 MIN. QFF PRESSURE IN HPA 1010.6 1006.5 1001.3 999.5 1000.7 994.0 994.3 994.2 1003.5 1007.8 1010.9 1003.9 994.0 DAY 7 25 28 25 24 19 24 15 10 21 11 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 892.7 891.9 887.8 885.1 886.1 883.9 884.5 883.1 887.7 890.3 894.0 892.1 888.3 MAX. QFE PRESSURE IN HPA 903.9 901.7 900.6 892.2 892.1 892.3 889.9 888.6 892.4 894.4 902.0 901.5 903.9 DAY 27 6 10 1 17 24 29 12 21 10 18 3 MIN. QFE PRESSURE IN HPA 882.3 879.9 878.2 876.5 879.9 876.3 878.8 876.7 883.0 884.5 885.8 877.1 876.3 DAY 7 26 28 3 24 19 24 15 10 21 12 21 MEAN QNH PRESSURE IN HPA 1019.5 1018.6 1014.0 1011.0 1012.1 1009.7 1010.4 1008.8 1013.9 1016.9 1021.0 1018.9 1014.6 MAX. QNH PRESSURE IN HPA 1032.0 1029.5 1028.3 1019.0 1018.8 1019.1 1016.4 1015.0 1019.2 1021.4 1029.9 1029.3 1032.0 DAY 27 6 10 1 17 24 29 12 21 10 18 3 MIN. QNH PRESSURE IN HPA 1007.9 1005.3 1003.4 1001.5 1005.3 1001.2 1004.0 1001.7 1008.7 1010.4 1011.8 1002.1 1001.2 DAY 7 26 28 3 24 19 24 15 10 21 12 21 MEAN QFF PRESSURE IN HPA 1023.6 1020.2 1012.8 1008.4 1007.3 1002.0 1001.2 999.6 1005.7 1011.3 1020.4 1023.6 1011.3 MAX. QFF PRESSURE IN HPA 1039.7 1032.9 1030.1 1017.0 1014.9 1012.3 1008.1 1007.6 1011.6 1016.7 1030.0 1036.6 1039.7 DAY 27 5 10 1 17 24 29 30 21 23 18 14 MIN. QFF PRESSURE IN HPA 1008.5 1003.8 1000.7 1000.3 998.3 992.2 994.8 991.1 1000.5 1005.7 1008.4 1004.4 991.1 DAY 7 26 28 3 24 19 23 15 10 21 11 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 893.0 892.0 887.8 885.3 885.9 883.7 884.4 882.7 887.3 890.7 894.3 892.5 888.3 MAX. QFE PRESSURE IN HPA 903.8 901.6 899.4 892.8 892.0 892.2 890.2 888.7 891.4 895.6 901.7 901.8 903.8 DAY 27 5 10 1 16 24 29 12 29 10 18 2 MIN. QFE PRESSURE IN HPA 881.7 879.6 878.6 876.6 880.6 875.4 878.4 876.1 882.4 885.4 886.8 877.8 875.4 DAY 7 26 28 3 19 19 24 7 10 29 11 21 MEAN QNH PRESSURE IN HPA 1019.9 1018.7 1014.0 1011.3 1011.9 1009.5 1010.3 1008.4 1013.5 1017.3 1021.3 1019.3 1014.6 MAX. QNH PRESSURE IN HPA 1031.9 1029.4 1027.0 1019.6 1018.7 1019.0 1016.7 1015.1 1018.1 1022.7 1029.5 1029.7 1031.9 DAY 27 5 10 1 16 24 29 12 29 10 18 2 MIN. QNH PRESSURE IN HPA 1007.3 1004.9 1003.8 1001.6 1006.0 1000.2 1003.6 1001.0 1008.0 1011.4 1012.9 1002.9 1000.2 DAY 7 26 28 3 19 19 24 7 10 29 11 21 MEAN QFF PRESSURE IN HPA 1024.7 1021.1 1013.6 1009.2 1007.6 1002.2 1002.0 1000.0 1006.3 1012.9 1021.7 1024.6 1012.1 MAX. QFF PRESSURE IN HPA 1040.7 1034.1 1029.4 1018.5 1016.2 1012.7 1009.2 1009.0 1011.8 1019.2 1031.1 1037.9 1040.7 DAY 27 5 10 1 16 24 29 30 29 22 18 14 MIN. QFF PRESSURE IN HPA 1008.2 1004.2 1001.8 1001.0 999.7 992.0 996.0 991.0 1000.8 1008.0 1011.3 1005.8 991.0 DAY 7 26 26 3 19 19 24 7 10 3 11 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 893.4 892.9 889.4 886.8 887.5 885.7 886.4 885.0 889.1 892.2 895.1 893.0 889.7 MAX. QFE PRESSURE IN HPA 903.5 903.1 900.3 893.5 894.1 893.9 892.0 891.7 893.6 896.7 902.4 902.8 903.5 DAY 27 5 6 1 16 24 28 30 29 10 17 2 MIN. QFE PRESSURE IN HPA 881.0 881.4 879.8 878.1 882.6 877.4 880.1 878.4 884.3 886.9 886.7 878.1 877.4 DAY 7 26 26 3 19 19 24 16 10 29 11 20 MEAN QNH PRESSURE IN HPA 1020.3 1019.8 1015.9 1013.0 1013.7 1011.7 1012.5 1010.9 1015.6 1019.0 1022.2 1019.8 1016.2 MAX. QNH PRESSURE IN HPA 1031.6 1031.1 1028.0 1020.4 1021.1 1020.9 1018.7 1018.4 1020.5 1024.0 1030.3 1030.8 1031.6 DAY 27 5 6 1 16 24 28 30 29 10 17 2 MIN. QNH PRESSURE IN HPA 1006.5 1006.9 1005.1 1003.3 1008.3 1002.5 1005.5 1003.6 1010.2 1013.1 1012.8 1003.3 1002.5 DAY 7 26 26 3 19 19 24 16 10 29 11 20 MEAN QFF PRESSURE IN HPA 1025.1 1022.3 1015.5 1010.7 1009.2 1004.4 1003.8 1002.3 1008.2 1014.3 1022.5 1025.2 1013.6 MAX. QFF PRESSURE IN HPA 1040.8 1036.0 1029.9 1018.7 1018.4 1013.9 1011.0 1012.4 1013.8 1020.9 1031.9 1038.2 1040.8 DAY 27 5 10 1 16 24 28 30 29 22 17 29 MIN. QFF PRESSURE IN HPA 1007.3 1007.1 1001.9 1002.9 1001.0 993.9 997.2 994.1 1003.2 1009.6 1010.9 1007.3 993.9 DAY 7 26 26 3 28 19 24 16 10 29 11 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 893.4 893.0 889.9 887.0 888.1 886.6 887.1 886.0 889.9 892.5 895.4 892.9 890.2 MAX. QFE PRESSURE IN HPA 904.3 903.5 901.1 893.6 895.0 894.3 892.7 892.6 894.2 896.9 903.0 903.4 904.3 DAY 26 5 10 1 16 24 28 30 20 10 17 2 MIN. QFE PRESSURE IN HPA 880.2 881.4 878.9 878.1 883.1 878.2 881.1 879.4 885.0 886.9 886.5 877.2 877.2 DAY 7 26 26 3 19 19 24 16 10 29 11 20 MEAN QNH PRESSURE IN HPA 1020.3 1019.8 1016.4 1013.2 1014.4 1012.7 1013.3 1012.1 1016.4 1019.3 1022.6 1019.7 1016.7 MAX. QNH PRESSURE IN HPA 1032.4 1031.6 1028.9 1020.5 1022.1 1021.3 1019.5 1019.4 1021.2 1024.2 1031.0 1031.4 1032.4 DAY 26 5 10 1 16 24 28 30 20 10 17 2 MIN. QNH PRESSURE IN HPA 1005.6 1006.9 1004.1 1003.3 1008.8 1003.4 1006.6 1004.7 1010.9 1013.1 1012.6 1002.3 1002.3 DAY 7 26 26 3 19 19 24 16 10 29 11 20 MEAN QFF PRESSURE IN HPA 1024.7 1021.8 1015.3 1010.6 1009.5 1004.9 1004.0 1003.0 1008.4 1014.0 1022.2 1024.6 1013.6 MAX. QFF PRESSURE IN HPA 1040.4 1035.5 1030.7 1017.9 1019.0 1013.9 1011.0 1012.8 1013.5 1021.4 1031.8 1037.3 1040.4 DAY 26 5 10 1 16 24 28 30 20 22 17 29 MIN. QFF PRESSURE IN HPA 1006.5 1006.0 999.1 1002.9 1001.0 994.1 997.5 994.6 1003.0 1008.1 1009.7 1005.6 994.1 DAY 7 26 26 3 28 19 24 16 10 29 11 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.8 2.5 5.6 12.2 16.9 22.5 26.5 27.4 22.2 18.6 7.6 1.3 13.7 MINIMUN AIR TEMPERATURE (C) -2.5 -1.1 1.1 6.2 9.6 14.5 19.3 19.7 14.8 11.1 2.7 -1.5 7.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 7 8 0 0 0 0 15 DAYS WITH MINIMUM TEMP. <=-4 7 3 3 0 0 0 0 0 0 0 1 7 21 DAYS WITH FREEZING MIN.<= 0 28 19 11 2 0 0 0 0 0 0 9 20 89 TEMPERATURE RECORDS LOWEST(C) -9.8 -6.2 -7.2 -0.4 2.4 8.4 14.8 16.4 8.6 3.8 -5.0 -7.4 -9.8 DAY 1 18 2 18 1 6 2 3 23 31 25 12 MAXIMUM AIR TEMPERATURE (C) 5.3 7.5 11.1 18.9 24.5 30.5 34.6 35.6 30.2 26.7 13.3 5.0 20.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 18 30 31 16 3 0 0 98 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 1 1 TEMPERATURE RECORDS HIGHEST(C) 12.2 13.0 15.6 28.0 28.6 36.0 39.2 42.6 37.4 31.0 21.0 12.0 42.6 DAY 14 9 16 6 21 28 17 12 6 10 1 8 DIF. BETWEEN (MAX.-MIN.) (C) 7.8 8.6 10.0 12.7 14.9 16.0 15.3 15.9 15.4 15.6 10.6 6.5 12.5 MEAN DAILY TEMP. (MDT) (C) 1.4 3.2 6.1 12.5 17.0 22.5 27.0 27.7 22.5 18.9 8.0 1.8 14.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 62.1 184.8 207.1 65.0 1.1 0.0 0.0 520.2 HEATING DEG. DAYS(BASE 18 0C) 514.6 413.3 368.9 165.7 46.2 4.0 0.0 0.0 1.4 12.9 300.3 503.2 2330.5 DEWPOINT (MEAN C) -2.9 -2.7 -1.0 3.2 6.5 8.3 10.9 10.7 7.1 3.5 -0.3 -2.2 3.4 MIXING RATIO (G/KG) 3.54 3.59 4.17 5.67 7.09 7.88 9.51 9.33 7.25 5.67 4.41 3.75 5.99 VAPOUR PRESSURE (HPA) 5.05 5.09 5.91 8.02 10.02 11.08 13.31 13.10 10.25 8.05 6.29 5.36 8.46 SATURATION DEF. (HPA) 1.63 2.43 3.57 7.11 10.21 17.71 22.87 25.20 18.15 14.36 4.65 1.54 10.79 RELATIVE HUMIDITY (MEAN %) 77 71 66 59 54 43 40 38 42 39 61 79 56 RELATIVE HUMIDITY (MAX. %) 88 89 84 81 75 64 57 55 60 57 79 89 73 RELATIVE HUMIDITY (MIN. %) 62 49 45 38 32 24 24 22 23 23 42 65 37 RELATIVE HUMIDITY (MEAN% 03UTC) 85 82 80 77 72 62 56 53 58 56 75 86 70 RELATIVE HUMIDITY (MEAN% 09UTC) 70 61 57 48 39 32 31 29 31 33 50 70 46 RELATIVE HUMIDITY (MEAN% 15UTC) 73 61 53 48 43 30 29 28 30 29 53 78 46 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 19.0 38.4 40.0 75.9 19.3 2.5 0.0 0.1 0.0 3.7 29.1 48.6 276.6 DAYS WITH PRECIPITATION >=10 1 0 1 1 1 0 0 0 0 0 0 2 6 DAYS WITH PRECIPITATION >= 5 2 3 2 6 1 0 0 0 0 0 2 3 19 DAYS WITH PRECIPITATION >= 1 3 7 9 8 4 2 0 0 0 1 6 10 50 DAYS WITH PRECIPITATION 6 15 16 12 12 5 0 2 0 5 8 14 95 GREATEST DAILY PRECIPITATION 10.0 9.0 17.2 31.0 11.4 1.2 0.0 0.1 0.0 3.1 7.1 14.0 31.0 DAY 28 13 26 16 15 1 ** 21 ** 30 30 6 DAY WITH THUNDER STORM 0 0 2 7 12 4 0 4 0 5 0 0 34 DAYS WITH SNOW OR SLEET 5 11 2 1 0 0 0 0 0 0 0 7 26 DAYS WITH DUST 0 0 0 1 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 315 315 45 45 45 45 45 45 45 270 90 45 45 PREVAILING WIND SPEED(KNOTS) 4.5 6.4 8.0 9.0 7.8 10.3 9.7 9.9 9.3 7.4 5.5 7.1 9.2 PREVAILING WIND PERCENT 4.8 8.5 10.5 18.3 13.3 27.5 41.5 39.5 35.4 10.5 4.6 4.4 17.3 CALMS PERCENT OF WIND 82.7 68.8 60.1 53.3 63.3 42.5 24.6 37.5 45.4 65.7 80.8 85.9 59.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 25 283 304 4 32 53 57 57 52 282 343 310 44 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.7 0.7 0.8 1.1 3.1 5.4 5.0 3.8 0.9 0.3 0.1 1.5 WIND STEADINESES (MEAN %) 20.0 35.0 21.2 19.5 40.7 64.6 81.8 87.7 82.6 37.5 25.0 10.0 45.5 WIND SPEED (MEAN KNOTS) 1.0 2.0 3.3 4.1 2.7 4.8 6.6 5.7 4.6 2.4 1.2 1.0 3.3 FASTEST WIND DIRECTION 90 240 240 240 240 60 60 50 60 230 270 240 240 FASTEST WIND SPEED (KNOTS) 14 21 27 31 27 23 19 19 19 21 19 23 31 DAY 16 21 20 6 22 18 27 2 8 27 20 19 DAYS WITH SKY CLEAR (0-2)/8 13 5 6 7 15 29 31 30 27 17 12 10 202 DAYS WITH P.CLOUDY (3-6)/8 10 13 12 13 12 1 0 1 3 13 11 12 101 DAYS WITH CLOUDY (7-8)/8 8 10 13 10 4 0 0 0 0 1 7 9 62 DAYS WITH VISIBILITY =< 2 KM 5 5 0 0 0 0 0 0 0 0 0 5 15 DURATION OF SUNSHINE HOURS 135.4 134.7 168.0 193.6 275.6 359.6 361.7 360.0 312.0 244.2 179.9 111.3 2836.0 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 893.0 888.3 888.7 889.4 890.5 886.3 883.8 887.3 889.3 891.0 894.7 895.5 889.8 MAX. QFE PRESSURE IN HPA 901.3 897.4 902.8 899.1 900.3 895.5 891.2 892.7 898.9 899.4 906.0 907.8 907.8 DAY-HOUR 12- 6 12- 6 2- 6 30-21 1- 6 6- 3 4- 0 4- 3 22-21 15- 6 25- 6 11-18 MIN. QFE PRESSURE IN HPA 876.2 874.6 874.6 878.5 882.4 878.9 876.3 881.7 880.2 881.5 886.0 882.5 874.6 DAY-HOUR 28-12 20-12 26- 6 20-15 7- 9 22-15 8-15 14-15 6-15 27-12 9-15 19- 0 MEAN QNH PRESSURE IN HPA 1019.8 1014.6 1015.1 1015.8 1017.1 1012.4 1009.6 1013.4 1015.8 1017.6 1021.7 1022.7 1016.3 MAX. QNH PRESSURE IN HPA 1029.1 1024.8 1030.8 1026.6 1028.0 1022.6 1017.9 1019.5 1026.4 1027.0 1034.3 1036.3 1036.3 DAY-HOUR 12- 6 12- 6 2- 6 30-21 1- 6 6- 3 4- 0 4- 3 22-21 15- 6 25- 6 11-18 MIN. QNH PRESSURE IN HPA 1001.1 999.4 999.4 1003.7 1008.0 1004.1 1001.2 1007.3 1005.6 1007.0 1012.1 1008.2 999.4 DAY-HOUR 28-12 20-12 26- 6 20-15 7- 9 22-15 8-15 14-15 6-15 27-12 9-15 19- 0 MEAN QFF PRESSURE IN HPA 1023.3 1017.1 1016.1 1013.6 1012.7 1005.4 1000.7 1004.3 1009.0 1012.5 1021.9 1026.0 1013.5 MAX. QFF PRESSURE IN HPA 1032.7 1029.2 1036.3 1027.6 1027.2 1020.3 1009.2 1011.6 1023.5 1021.3 1038.0 1041.6 1041.6 DAY-HOUR 12- 6 28-18 2- 6 29- 3 1- 3 6- 3 3- 6 4- 3 23- 3 15- 6 25- 6 11-18 MIN. QFF PRESSURE IN HPA 1004.2 999.1 997.3 999.2 1004.0 995.4 991.3 997.6 995.8 1000.7 1010.0 1009.8 991.3 DAY-HOUR 28-12 20-12 26- 6 26-12 7- 9 22-15 8-12 5-15 6-12 27-12 9- 0 6-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 893.0 888.2 888.7 889.4 891.2 887.3 884.6 888.0 890.1 891.3 894.7 895.5 890.2 MAX. QFE PRESSURE IN HPA 900.4 895.2 900.9 896.3 899.5 894.7 891.2 891.4 898.5 897.1 903.2 906.3 906.3 DAY 12 7 2 29 1 6 4 4 23 16 25 12 MIN. QFE PRESSURE IN HPA 882.1 876.1 878.1 880.4 885.2 882.1 880.6 885.1 884.5 881.6 886.6 882.5 876.1 DAY 29 19 26 21 29 22 8 27 6 29 9 19 MEAN QNH PRESSURE IN HPA 1019.8 1014.5 1015.1 1015.8 1017.8 1013.5 1010.5 1014.3 1016.6 1018.0 1021.8 1022.7 1016.7 MAX. QNH PRESSURE IN HPA 1028.1 1022.3 1028.7 1023.5 1027.1 1021.7 1017.9 1018.1 1026.0 1024.4 1031.2 1034.7 1034.7 DAY 12 7 2 29 1 6 4 4 23 16 25 12 MIN. QNH PRESSURE IN HPA 1007.7 1001.0 1003.3 1005.8 1011.2 1007.7 1006.0 1011.1 1010.4 1007.2 1012.7 1008.2 1001.0 DAY 29 19 26 21 29 22 8 27 6 29 9 19 MEAN QFF PRESSURE IN HPA 1023.0 1016.5 1015.8 1013.2 1013.3 1006.2 1001.3 1004.7 1009.2 1012.3 1021.4 1025.6 1013.5 MAX. QFF PRESSURE IN HPA 1030.6 1024.2 1034.0 1025.9 1026.0 1016.9 1008.4 1009.1 1021.8 1018.7 1033.7 1039.9 1039.9 DAY 12 28 2 29 1 6 4 4 23 16 25 12 MIN. QFF PRESSURE IN HPA 1010.9 1002.2 1001.1 1001.5 1005.8 998.8 995.7 1000.5 1000.1 1001.7 1010.0 1010.0 995.7 DAY 29 20 26 26 31 23 8 13 6 29 9 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 893.1 888.5 889.1 889.9 891.7 888.0 885.5 888.9 890.9 892.1 895.2 895.5 890.7 MAX. QFE PRESSURE IN HPA 900.3 895.3 901.5 896.8 899.9 895.5 891.2 892.7 898.5 897.7 903.9 905.7 905.7 DAY 12 12 2 29 1 6 4 4 23 15 25 12 MIN. QFE PRESSURE IN HPA 882.7 875.3 876.9 882.2 884.3 883.0 881.2 886.2 885.1 882.0 886.5 883.5 875.3 DAY 28 20 26 21 29 22 8 27 6 29 9 19 MEAN QNH PRESSURE IN HPA 1020.0 1014.8 1015.5 1016.4 1018.5 1014.3 1011.5 1015.3 1017.5 1018.9 1022.3 1022.6 1017.3 MAX. QNH PRESSURE IN HPA 1028.0 1022.4 1029.3 1024.1 1027.5 1022.6 1017.9 1019.5 1026.0 1025.1 1032.0 1034.0 1034.0 DAY 12 12 2 29 1 6 4 4 23 15 25 12 MIN. QNH PRESSURE IN HPA 1008.4 1000.1 1001.9 1007.8 1010.2 1008.7 1006.7 1012.3 1011.1 1007.6 1012.6 1009.3 1000.1 DAY 28 20 26 21 29 22 8 27 6 29 9 19 MEAN QFF PRESSURE IN HPA 1023.8 1017.5 1016.7 1014.7 1014.5 1007.7 1002.9 1006.5 1011.2 1014.4 1022.9 1026.3 1014.9 MAX. QFF PRESSURE IN HPA 1031.5 1025.7 1035.2 1027.6 1027.2 1020.3 1008.9 1011.6 1023.5 1020.5 1036.0 1040.6 1040.6 DAY 12 12 2 29 1 6 4 4 23 23 25 12 MIN. QFF PRESSURE IN HPA 1010.7 1000.8 1000.2 1003.1 1005.5 1000.6 997.8 1002.7 1002.2 1002.9 1010.7 1011.8 997.8 DAY 28 20 26 26 29 22 7 10 6 29 9 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 894.3 889.4 890.0 890.6 891.9 887.9 885.5 889.1 891.4 893.0 896.2 896.6 891.3 MAX. QFE PRESSURE IN HPA 901.3 897.4 902.8 897.6 900.3 895.0 891.1 892.1 898.9 899.4 906.0 906.4 906.4 DAY 12 12 2 29 1 6 3 4 23 15 25 11 MIN. QFE PRESSURE IN HPA 881.0 876.0 874.6 882.6 884.5 883.1 881.0 886.5 885.1 884.5 887.0 885.2 874.6 DAY 28 19 26 20 7 27 8 27 7 27 9 6 MEAN QNH PRESSURE IN HPA 1021.2 1015.9 1016.5 1017.1 1018.6 1014.2 1011.5 1015.5 1018.0 1019.9 1023.5 1023.9 1018.0 MAX. QNH PRESSURE IN HPA 1029.1 1024.8 1030.8 1025.0 1028.0 1022.1 1017.7 1018.8 1026.4 1027.0 1034.3 1034.8 1034.8 DAY 12 12 2 29 1 6 3 4 23 15 25 11 MIN. QNH PRESSURE IN HPA 1006.5 1000.9 999.4 1008.3 1010.4 1008.8 1006.5 1012.6 1011.1 1010.4 1013.2 1011.2 999.4 DAY 28 19 26 20 7 27 8 27 7 27 9 6 MEAN QFF PRESSURE IN HPA 1025.2 1018.7 1017.7 1015.3 1014.3 1007.4 1003.0 1006.7 1011.5 1015.2 1023.9 1027.5 1015.5 MAX. QFF PRESSURE IN HPA 1032.7 1028.8 1036.3 1027.5 1026.9 1020.1 1009.2 1011.2 1023.0 1021.3 1038.0 1040.6 1040.6 DAY 12 12 2 29 1 6 3 16 23 15 25 12 MIN. QFF PRESSURE IN HPA 1009.8 1002.7 997.3 1005.2 1006.0 1000.4 997.2 1002.9 1001.7 1004.6 1011.4 1013.0 997.2 DAY 28 20 26 21 7 27 7 13 6 27 9 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 893.3 888.6 889.1 889.4 890.4 886.2 883.7 887.3 889.4 891.2 894.9 895.6 889.9 MAX. QFE PRESSURE IN HPA 899.6 897.4 902.0 896.8 898.9 893.3 890.0 890.1 897.2 897.9 904.1 906.3 906.3 DAY 11 12 2 29 1 6 3 3 22 15 25 11 MIN. QFE PRESSURE IN HPA 878.4 875.8 875.9 881.2 882.4 881.5 879.2 884.6 882.9 882.8 887.2 883.1 875.8 DAY 28 19 26 20 7 30 8 27 6 27 9 6 MEAN QNH PRESSURE IN HPA 1020.2 1015.0 1015.5 1015.8 1016.9 1012.3 1009.5 1013.5 1015.9 1017.8 1021.9 1022.7 1016.4 MAX. QNH PRESSURE IN HPA 1027.2 1024.8 1029.9 1024.1 1026.4 1020.2 1016.5 1016.6 1024.5 1025.3 1032.2 1034.7 1034.7 DAY 11 12 2 29 1 6 3 3 22 15 25 11 MIN. QNH PRESSURE IN HPA 1003.6 1000.7 1000.8 1006.7 1008.0 1007.0 1004.5 1010.5 1008.6 1008.5 1013.4 1008.8 1000.7 DAY 28 19 26 20 7 30 8 27 6 27 9 6 MEAN QFF PRESSURE IN HPA 1023.5 1017.3 1016.4 1013.3 1012.0 1005.0 1000.5 1004.0 1008.7 1012.3 1021.7 1025.8 1013.4 MAX. QFF PRESSURE IN HPA 1030.2 1028.0 1034.9 1025.7 1024.3 1017.2 1007.1 1008.2 1019.8 1019.2 1034.9 1038.4 1038.4 DAY 12 12 2 29 1 6 3 16 22 15 25 12 MIN. QFF PRESSURE IN HPA 1006.8 1001.5 1000.0 1001.3 1004.0 998.4 994.5 1000.4 998.4 1002.3 1012.0 1010.4 994.5 DAY 28 20 26 6 7 22 8 27 6 27 9 6 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 892.0 887.3 887.7 887.9 888.8 884.2 881.7 885.1 887.3 889.2 893.5 894.6 888.3 MAX. QFE PRESSURE IN HPA 898.6 895.7 900.1 896.0 896.9 891.6 888.3 888.4 895.9 895.9 902.7 906.1 906.1 DAY 11 28 2 30 1 6 3 3 22 15 25 11 MIN. QFE PRESSURE IN HPA 876.2 874.6 876.3 879.3 882.5 879.4 876.8 882.2 880.6 881.5 886.6 882.6 874.6 DAY 28 20 19 20 7 30 8 27 6 27 9 6 MEAN QNH PRESSURE IN HPA 1018.8 1013.5 1013.9 1014.2 1015.2 1010.1 1007.3 1011.1 1013.5 1015.6 1020.4 1021.6 1014.6 MAX. QNH PRESSURE IN HPA 1026.1 1022.9 1027.8 1023.2 1024.2 1018.3 1014.6 1014.7 1023.1 1023.1 1030.7 1034.4 1034.4 DAY 11 28 2 30 1 6 3 3 22 15 25 11 MIN. QNH PRESSURE IN HPA 1001.1 999.4 1001.2 1004.6 1008.2 1004.7 1001.8 1007.8 1006.0 1007.0 1012.7 1008.3 999.4 DAY 28 20 19 20 7 30 8 27 6 27 9 6 MEAN QFF PRESSURE IN HPA 1021.8 1015.6 1014.6 1011.5 1010.5 1002.8 998.0 1001.4 1006.1 1009.9 1020.0 1024.5 1011.4 MAX. QFF PRESSURE IN HPA 1028.3 1026.3 1032.6 1023.3 1022.5 1014.9 1005.5 1006.0 1018.1 1016.9 1033.3 1038.2 1038.2 DAY 11 28 2 29 1 6 3 3 22 15 25 11 MIN. QFF PRESSURE IN HPA 1004.2 999.1 1000.5 999.2 1004.2 996.1 991.3 997.8 995.8 1000.7 1011.3 1009.8 991.3 DAY 28 20 19 26 29 22 8 27 6 27 9 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 892.4 887.7 887.8 888.2 888.9 884.0 881.4 884.8 887.0 889.4 893.8 895.2 888.4 MAX. QFE PRESSURE IN HPA 898.9 896.4 899.5 896.2 896.4 890.8 887.9 888.4 896.3 896.1 902.8 907.1 907.1 DAY 11 28 2 30 1 6 3 3 22 15 25 11 MIN. QFE PRESSURE IN HPA 877.7 875.4 878.0 878.5 884.2 878.9 876.3 881.7 880.2 883.3 886.0 884.6 875.4 DAY 28 19 26 20 30 22 8 14 6 27 9 6 MEAN QNH PRESSURE IN HPA 1019.2 1013.9 1014.0 1014.5 1015.3 1009.8 1006.9 1010.7 1013.1 1015.9 1020.7 1022.3 1014.7 MAX. QNH PRESSURE IN HPA 1026.4 1023.6 1027.1 1023.4 1023.6 1017.4 1014.2 1014.7 1023.5 1023.3 1030.8 1035.6 1035.6 DAY 11 28 2 30 1 6 3 3 22 15 25 11 MIN. QNH PRESSURE IN HPA 1002.8 1000.2 1003.1 1003.7 1010.1 1004.1 1001.2 1007.3 1005.6 1009.0 1012.1 1010.5 1000.2 DAY 28 19 26 20 30 22 8 14 6 27 9 6 MEAN QFF PRESSURE IN HPA 1022.9 1016.6 1015.1 1012.6 1011.2 1003.0 998.2 1001.9 1006.9 1011.4 1021.4 1026.0 1012.3 MAX. QFF PRESSURE IN HPA 1029.6 1027.6 1032.4 1025.3 1022.6 1013.8 1005.4 1006.7 1019.5 1018.5 1034.4 1040.3 1040.3 DAY 11 28 2 28 1 6 21 3 22 15 25 11 MIN. QFF PRESSURE IN HPA 1006.1 1002.2 1002.5 999.9 1004.9 995.4 991.8 997.6 996.7 1003.6 1011.0 1012.2 991.8 DAY 28 19 26 20 30 22 8 5 6 27 9 6 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 893.0 888.3 888.8 889.6 890.7 886.0 883.5 887.0 889.1 890.8 894.6 895.8 889.8 MAX. QFE PRESSURE IN HPA 899.8 897.3 899.8 898.3 897.5 894.3 889.4 890.7 898.5 896.7 903.3 907.8 907.8 DAY 11 28 1 30 1 5 3 3 22 15 25 11 MIN. QFE PRESSURE IN HPA 879.3 876.5 879.6 879.8 884.8 880.6 879.0 883.6 882.8 882.5 886.9 885.9 876.5 DAY 28 19 26 20 28 30 8 14 6 28 19 18 MEAN QNH PRESSURE IN HPA 1019.8 1014.6 1015.2 1016.1 1017.3 1012.1 1009.3 1013.1 1015.5 1017.4 1021.6 1022.9 1016.2 MAX. QNH PRESSURE IN HPA 1027.4 1024.6 1027.4 1025.8 1024.9 1021.3 1015.8 1017.3 1026.0 1024.0 1031.3 1036.3 1036.3 DAY 11 28 1 30 1 5 3 3 22 15 25 11 MIN. QNH PRESSURE IN HPA 1004.6 1001.5 1004.9 1005.1 1010.7 1006.0 1004.3 1009.4 1008.5 1008.2 1013.1 1011.9 1001.5 DAY 28 19 26 20 28 30 8 14 6 28 19 18 MEAN QFF PRESSURE IN HPA 1023.7 1017.5 1016.3 1014.2 1012.9 1005.3 1000.8 1004.3 1009.0 1012.7 1022.0 1026.6 1013.8 MAX. QFF PRESSURE IN HPA 1031.0 1029.2 1032.6 1026.0 1023.4 1017.8 1007.4 1009.3 1022.0 1019.1 1034.6 1041.6 1041.6 DAY 11 28 1 28 1 5 21 3 22 15 25 11 MIN. QFF PRESSURE IN HPA 1008.0 1003.7 1004.9 1001.5 1005.9 997.7 994.6 1000.1 999.4 1003.9 1012.1 1014.0 994.6 DAY 28 19 26 20 28 22 8 14 6 28 9 6 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 893.0 888.5 888.9 890.1 891.0 886.8 884.4 888.0 889.8 891.2 894.8 895.6 890.2 MAX. QFE PRESSURE IN HPA 900.3 897.4 900.2 899.1 897.8 894.7 890.6 891.4 898.9 897.0 902.9 906.8 906.8 DAY 11 28 1 30 1 5 3 3 22 15 25 11 MIN. QFE PRESSURE IN HPA 880.4 876.7 880.4 880.4 885.6 881.4 880.5 885.1 884.1 881.5 887.4 883.7 876.7 DAY 28 19 25 20 28 30 8 26 5 28 8 18 MEAN QNH PRESSURE IN HPA 1019.8 1014.8 1015.3 1016.6 1017.6 1012.9 1010.3 1014.2 1016.3 1017.9 1021.9 1022.8 1016.7 MAX. QNH PRESSURE IN HPA 1028.0 1024.8 1027.9 1026.6 1025.2 1021.7 1017.2 1018.1 1026.4 1024.3 1030.9 1035.2 1035.2 DAY 11 28 1 30 1 5 3 3 22 15 25 11 MIN. QNH PRESSURE IN HPA 1005.8 1001.7 1005.8 1005.8 1011.6 1006.9 1005.9 1011.1 1009.9 1007.0 1013.6 1009.5 1001.7 DAY 28 19 25 20 28 30 8 26 5 28 8 18 MEAN QFF PRESSURE IN HPA 1023.1 1017.1 1016.0 1014.1 1012.7 1005.6 1001.3 1004.8 1009.2 1012.4 1021.8 1025.9 1013.7 MAX. QFF PRESSURE IN HPA 1031.0 1029.2 1032.6 1025.8 1023.1 1017.1 1007.7 1009.6 1022.4 1018.9 1032.9 1040.1 1040.1 DAY 11 28 1 28 1 5 3 3 22 15 25 11 MIN. QFF PRESSURE IN HPA 1009.1 1003.3 1003.5 1002.2 1005.8 998.6 995.9 1000.5 999.9 1001.4 1011.2 1012.1 995.9 DAY 28 19 25 20 30 22 7 12 5 28 8 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.5 4.4 10.0 12.2 17.4 24.3 25.8 28.0 22.4 16.5 8.0 -0.6 14.2 MINIMUN AIR TEMPERATURE (C) -0.8 -0.8 3.1 5.4 10.8 15.9 18.7 20.2 14.4 9.2 4.5 -4.4 8.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 2 5 9 1 0 0 0 17 DAYS WITH MINIMUM TEMP. <=-4 7 4 0 1 0 0 0 0 0 0 0 18 30 DAYS WITH FREEZING MIN.<= 0 18 20 8 5 0 0 0 0 0 0 7 29 87 TEMPERATURE RECORDS LOWEST(C) -5.8 -7.0 -3.2 -4.2 7.6 11.6 13.4 16.4 9.4 4.2 -3.8 -10.8 -10.8 DAY 21 24 17 6 19 14 11 27 20 25 30 19 MAXIMUM AIR TEMPERATURE (C) 7.1 10.6 17.6 19.2 24.1 32.8 33.7 36.1 31.3 24.6 12.7 4.1 21.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 23 28 31 18 4 0 0 106 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 5 5 TEMPERATURE RECORDS HIGHEST(C) 11.6 17.5 28.0 27.6 30.6 38.0 38.6 39.2 38.6 31.0 20.2 11.0 39.2 DAY 23 27 5 14 10 26 17 3 10 2 1 10 DIF. BETWEEN (MAX.-MIN.) (C) 7.9 11.4 14.5 13.8 13.3 16.9 15.0 15.9 16.9 15.4 8.2 8.5 13.2 MEAN DAILY TEMP. (MDT) (C) 3.1 4.9 10.3 12.3 17.5 24.4 26.2 28.1 22.9 16.9 8.6 -0.1 14.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 3.8 101.4 163.7 221.4 75.7 2.4 0.0 0.0 568.5 HEATING DEG. DAYS(BASE 18 0C) 461.6 379.7 240.5 174.6 44.5 0.0 0.0 0.0 1.1 56.8 281.2 562.0 2202.1 DEWPOINT (MEAN C) -1.9 -2.7 -1.1 1.5 7.1 8.7 10.8 10.5 5.4 4.0 4.1 -5.0 3.4 MIXING RATIO (G/KG) 3.82 3.61 4.07 5.03 7.25 8.12 9.31 9.35 6.68 5.94 6.10 3.05 6.03 VAPOUR PRESSURE (HPA) 5.43 5.14 5.80 7.12 10.22 11.42 13.06 13.11 9.46 8.45 8.66 4.36 8.52 SATURATION DEF. (HPA) 2.04 3.67 7.70 8.33 10.65 20.60 21.67 26.34 19.54 11.45 2.48 1.69 11.35 RELATIVE HUMIDITY (MEAN %) 75 63 49 53 55 41 42 37 37 47 78 74 54 RELATIVE HUMIDITY (MAX. %) 88 83 69 74 79 60 60 54 54 65 91 86 72 RELATIVE HUMIDITY (MIN. %) 57 42 32 33 33 22 24 22 21 30 60 57 36 RELATIVE HUMIDITY (MEAN% 03UTC) 86 80 67 69 76 57 58 51 52 62 90 82 69 RELATIVE HUMIDITY (MEAN% 09UTC) 66 51 41 42 42 28 32 28 29 38 69 64 44 RELATIVE HUMIDITY (MEAN% 15UTC) 67 51 37 41 40 29 30 27 26 38 73 72 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 40.4 15.6 6.2 42.1 49.0 6.1 12.1 0.3 0.0 5.1 74.1 18.2 269.2 DAYS WITH PRECIPITATION >=10 1 1 0 1 1 0 0 0 0 0 2 1 7 DAYS WITH PRECIPITATION >= 5 2 1 0 3 4 0 1 0 0 1 4 1 17 DAYS WITH PRECIPITATION >= 1 7 3 1 7 9 1 4 0 0 1 10 3 46 DAYS WITH PRECIPITATION 13 9 4 9 15 6 5 1 0 2 16 6 86 GREATEST DAILY PRECIPITATION 17.4 10.3 4.8 15.4 20.6 4.0 5.0 0.3 0.0 5.0 26.0 13.0 26.0 DAY 13 2 31 20 1 22 11 30 ** 14 17 12 DAY WITH THUNDER STORM 0 0 0 3 12 3 7 0 1 0 1 0 27 DAYS WITH SNOW OR SLEET 8 5 2 1 0 0 0 0 0 0 0 4 20 DAYS WITH DUST 0 0 1 0 1 0 0 0 0 1 0 0 3 WIND DIRECTION (PREVAILING) 270 270 45 45 45 45 45 45 45 45 90 45 45 PREVAILING WIND SPEED(KNOTS) 6.2 10.2 11.2 8.6 9.5 10.0 10.2 9.0 8.9 8.4 3.6 5.2 9.1 PREVAILING WIND PERCENT 4.0 11.6 16.1 10.4 7.7 21.3 41.9 48.0 33.3 16.1 10.4 6.0 17.7 CALMS PERCENT OF WIND 87.9 68.5 60.9 66.3 65.3 50.0 22.2 15.3 32.5 44.0 47.5 70.2 52.5 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 278 253 27 16 268 40 53 48 44 10 179 33 40 VECTOR WIND MAGNITUDE(KNOTS) 0.3 1.9 0.8 0.4 0.6 2.2 5.8 5.2 3.1 1.0 0.4 0.4 1.3 WIND STEADINESES (MEAN %) 50.0 65.5 20.5 12.9 17.6 46.8 84.1 76.5 63.3 29.4 16.7 30.8 35.1 WIND SPEED (MEAN KNOTS) 0.6 2.9 3.9 3.1 3.4 4.7 6.9 6.8 4.9 3.4 2.4 1.3 3.7 FASTEST WIND DIRECTION 290 240 230 240 190 240 330 280 60 260 240 220 230 FASTEST WIND SPEED (KNOTS) 12 35 39 29 35 29 29 29 21 23 19 17 39 DAY 15 16 6 3 11 16 9 30 11 10 24 10 DAYS WITH SKY CLEAR (0-2)/8 8 11 7 12 11 27 26 29 29 23 11 16 210 DAYS WITH P.CLOUDY (3-6)/8 12 14 17 11 15 3 4 2 1 6 8 6 99 DAYS WITH CLOUDY (7-8)/8 11 4 7 7 5 0 1 0 0 2 11 9 57 DAYS WITH VISIBILITY =< 2 KM 1 0 0 1 0 0 0 0 0 0 0 3 5 DURATION OF SUNSHINE HOURS 145.2 184.9 207.6 240.4 264.7 362.5 358.2 358.0 315.4 256.3 133.5 158.4 2985.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 889.6 890.5 892.4 888.7 887.3 886.8 886.4 885.3 891.4 894.5 892.7 894.5 890.0 MAX. QFE PRESSURE IN HPA 898.2 897.6 903.7 897.9 893.0 896.2 892.7 890.2 898.4 901.7 900.3 905.7 905.7 DAY-HOUR 1- 0 25- 6 9- 6 12- 6 22- 3 13- 6 7- 3 17- 3 20- 6 27- 6 30- 6 3- 6 MIN. QFE PRESSURE IN HPA 878.4 877.5 882.7 879.0 874.5 880.7 880.6 875.1 881.8 883.6 877.1 885.4 874.5 DAY-HOUR 23-12 15- 0 30-15 3- 9 15-12 23-15 22-15 3-15 5-15 22- 0 23- 6 15-12 MEAN QNH PRESSURE IN HPA 1016.0 1017.0 1019.1 1015.1 1013.5 1013.0 1012.4 1011.3 1018.1 1021.5 1019.5 1021.5 1016.5 MAX. QNH PRESSURE IN HPA 1025.6 1025.0 1031.8 1025.3 1019.9 1023.4 1019.5 1016.7 1025.9 1029.5 1028.0 1034.0 1034.0 DAY-HOUR 1- 0 25- 6 9- 6 12- 6 22- 3 13- 6 7- 3 17- 3 20- 6 27- 6 30- 6 3- 6 MIN. QNH PRESSURE IN HPA 1003.6 1002.6 1008.4 1004.3 999.2 1006.1 1006.0 999.9 1007.4 1009.4 1002.1 1011.4 999.2 DAY-HOUR 23-12 15- 0 30-15 3- 9 15-12 23-15 22-15 3-15 5-15 22- 0 23- 6 15-12 MEAN QFF PRESSURE IN HPA 1018.6 1018.7 1018.1 1012.9 1008.7 1005.2 1003.9 1001.8 1011.2 1017.4 1019.2 1025.8 1013.5 MAX. QFF PRESSURE IN HPA 1030.2 1029.1 1033.9 1026.3 1017.3 1018.4 1012.2 1008.1 1021.5 1027.2 1031.8 1038.9 1038.9 DAY-HOUR 1- 0 25- 6 9- 6 6- 6 18- 3 13- 6 7- 6 30- 3 20- 6 27- 6 30- 6 3- 6 MIN. QFF PRESSURE IN HPA 1003.8 1000.2 1002.7 1000.3 994.7 997.1 997.3 989.0 998.5 1002.9 1000.1 1014.6 989.0 DAY-HOUR 23-12 15- 0 6- 9 3- 9 15-12 24-12 23-12 3-15 5-12 22- 0 23- 9 10-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 889.8 890.5 892.7 889.2 887.7 887.6 887.3 886.1 892.0 894.6 892.8 894.4 890.4 MAX. QFE PRESSURE IN HPA 898.2 896.5 903.2 896.4 892.2 894.7 892.0 889.2 897.2 899.8 898.6 903.6 903.6 DAY 1 10 9 12 22 6 7 30 20 27 30 4 MIN. QFE PRESSURE IN HPA 880.6 877.5 883.0 881.5 878.5 883.7 884.2 879.8 884.6 883.6 880.5 887.4 877.5 DAY 24 15 31 3 13 9 23 4 6 22 23 16 MEAN QNH PRESSURE IN HPA 1016.3 1017.0 1019.5 1015.6 1013.9 1013.8 1013.5 1012.1 1018.8 1021.7 1019.6 1021.4 1016.9 MAX. QNH PRESSURE IN HPA 1025.6 1023.8 1031.2 1023.6 1019.0 1021.7 1018.7 1015.6 1024.5 1027.4 1026.1 1031.7 1031.7 DAY 1 10 9 12 22 6 7 30 20 27 30 4 MIN. QNH PRESSURE IN HPA 1006.0 1002.6 1008.7 1007.0 1003.7 1009.5 1010.1 1005.1 1010.5 1009.4 1005.9 1013.6 1002.6 DAY 24 15 31 3 13 9 23 4 6 22 23 16 MEAN QFF PRESSURE IN HPA 1018.4 1018.2 1017.9 1013.3 1008.9 1005.7 1004.7 1002.3 1011.4 1016.9 1018.8 1025.3 1013.5 MAX. QFF PRESSURE IN HPA 1030.2 1026.4 1033.2 1024.1 1015.0 1015.6 1010.7 1006.0 1019.5 1024.8 1028.7 1036.1 1036.1 DAY 1 25 9 6 18 13 7 7 20 15 30 4 MIN. QFF PRESSURE IN HPA 1005.2 1000.2 1003.9 1002.4 997.5 1000.3 1000.9 994.9 1001.4 1002.9 1002.9 1015.5 994.9 DAY 24 15 31 23 13 24 23 4 6 22 23 12 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 889.6 890.8 893.3 889.7 888.2 888.5 888.0 887.0 892.8 895.3 893.0 894.7 890.9 MAX. QFE PRESSURE IN HPA 897.4 896.5 902.7 897.3 893.0 895.9 892.7 890.2 897.5 900.6 898.8 904.4 904.4 DAY 1 10 9 12 22 13 7 17 20 27 30 3 MIN. QFE PRESSURE IN HPA 880.2 880.0 883.3 880.6 878.7 884.7 884.3 881.5 886.0 884.6 879.2 886.7 878.7 DAY 23 15 31 3 13 24 10 4 6 22 23 15 MEAN QNH PRESSURE IN HPA 1016.1 1017.4 1020.2 1016.2 1014.5 1014.8 1014.3 1013.1 1019.6 1022.5 1019.9 1021.7 1017.5 MAX. QNH PRESSURE IN HPA 1024.8 1023.8 1030.7 1024.6 1019.9 1023.1 1019.5 1016.7 1024.9 1028.3 1026.3 1032.5 1032.5 DAY 1 10 9 12 22 13 7 17 20 27 30 3 MIN. QNH PRESSURE IN HPA 1005.6 1005.4 1009.0 1006.0 1003.9 1010.6 1010.2 1007.0 1012.1 1010.5 1004.5 1012.8 1003.9 DAY 23 15 31 3 13 24 10 4 6 22 23 15 MEAN QFF PRESSURE IN HPA 1018.9 1019.6 1019.7 1014.5 1010.1 1007.5 1006.0 1004.2 1013.4 1019.0 1020.0 1026.5 1014.9 MAX. QFF PRESSURE IN HPA 1029.9 1027.6 1033.3 1025.9 1017.3 1017.6 1012.2 1008.1 1021.2 1026.6 1030.1 1037.5 1037.5 DAY 1 25 9 6 18 13 7 30 20 27 30 3 MIN. QFF PRESSURE IN HPA 1007.1 1005.5 1004.5 1003.1 998.3 1001.6 1002.3 997.3 1003.2 1004.7 1003.0 1015.5 997.3 DAY 23 15 6 23 13 24 23 3 6 22 23 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 890.7 891.9 894.2 890.2 888.5 888.4 888.1 887.2 893.5 896.5 893.9 895.8 891.6 MAX. QFE PRESSURE IN HPA 897.4 897.6 903.7 897.9 892.9 896.2 892.6 890.2 898.4 901.7 900.3 905.7 905.7 DAY 1 25 9 12 18 13 7 17 20 27 30 3 MIN. QFE PRESSURE IN HPA 881.1 880.1 883.9 880.5 880.2 884.7 885.0 880.6 886.7 886.9 877.1 887.2 877.1 DAY 23 15 6 3 16 10 23 3 6 22 23 12 MEAN QNH PRESSURE IN HPA 1017.3 1018.7 1021.2 1016.7 1014.9 1014.7 1014.3 1013.4 1020.4 1023.7 1020.9 1023.0 1018.3 MAX. QNH PRESSURE IN HPA 1024.8 1025.0 1031.8 1025.3 1019.7 1023.4 1019.4 1016.7 1025.9 1029.5 1028.0 1034.0 1034.0 DAY 1 25 9 12 18 13 7 17 20 27 30 3 MIN. QNH PRESSURE IN HPA 1006.6 1005.5 1009.7 1005.9 1005.6 1010.6 1010.9 1006.0 1012.8 1013.1 1002.1 1013.4 1002.1 DAY 23 15 6 3 16 10 23 3 6 22 23 12 MEAN QFF PRESSURE IN HPA 1020.3 1020.9 1020.6 1014.7 1010.2 1007.2 1006.2 1004.2 1013.9 1020.0 1020.9 1027.6 1015.6 MAX. QFF PRESSURE IN HPA 1029.7 1029.1 1033.9 1026.3 1016.3 1018.4 1012.2 1007.8 1021.5 1027.2 1031.8 1038.9 1038.9 DAY 1 25 9 6 18 13 7 7 20 27 30 3 MIN. QFF PRESSURE IN HPA 1008.7 1006.0 1003.4 1001.6 1002.0 1001.2 1002.9 995.8 1003.9 1008.1 1000.2 1015.8 995.8 DAY 23 15 6 23 12 24 24 3 6 22 23 12 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 889.9 891.0 892.7 888.8 887.1 886.7 886.4 885.3 891.4 894.7 892.8 894.7 890.1 MAX. QFE PRESSURE IN HPA 895.9 896.3 902.3 896.0 891.6 894.0 890.4 888.5 896.2 899.7 898.7 904.7 904.7 DAY 30 25 8 11 21 13 7 29 20 27 30 3 MIN. QFE PRESSURE IN HPA 880.3 879.6 883.3 879.0 877.5 882.8 883.3 878.9 884.7 886.8 877.3 886.7 877.3 DAY 23 15 6 3 15 20 23 3 10 21 23 15 MEAN QNH PRESSURE IN HPA 1016.4 1017.6 1019.5 1015.1 1013.2 1012.8 1012.5 1011.3 1018.1 1021.8 1019.7 1021.8 1016.6 MAX. QNH PRESSURE IN HPA 1023.1 1023.5 1030.2 1023.2 1018.3 1021.0 1017.0 1014.8 1023.4 1027.3 1026.2 1032.9 1032.9 DAY 30 25 8 11 21 13 7 29 20 27 30 3 MIN. QNH PRESSURE IN HPA 1005.7 1004.9 1009.0 1004.3 1002.6 1008.5 1009.0 1004.1 1010.6 1012.9 1002.4 1012.8 1002.4 DAY 23 15 6 3 15 20 23 3 10 21 23 15 MEAN QFF PRESSURE IN HPA 1018.7 1018.9 1018.2 1012.7 1008.2 1004.8 1003.8 1001.5 1010.8 1017.1 1019.1 1025.9 1013.3 MAX. QFF PRESSURE IN HPA 1027.4 1027.4 1031.4 1023.8 1014.5 1015.4 1009.3 1004.8 1017.9 1024.5 1029.5 1037.9 1037.9 DAY 1 24 8 6 18 13 7 28 20 27 30 3 MIN. QFF PRESSURE IN HPA 1007.1 1004.2 1002.7 1000.3 998.8 999.1 1000.2 993.5 1001.1 1007.4 1000.1 1015.9 993.5 DAY 23 15 6 3 15 20 23 3 10 3 23 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 888.7 889.4 890.7 887.1 885.7 884.8 884.3 883.1 889.2 892.8 891.6 893.4 888.4 MAX. QFE PRESSURE IN HPA 894.4 894.5 900.9 894.0 890.5 891.9 888.5 886.6 894.3 898.2 896.7 903.7 903.7 DAY 11 9 8 11 21 13 7 29 20 14 29 3 MIN. QFE PRESSURE IN HPA 878.4 878.5 883.0 879.0 874.5 880.9 880.8 876.1 881.9 884.7 879.6 885.4 874.5 DAY 23 15 6 3 15 17 23 3 5 21 23 15 MEAN QNH PRESSURE IN HPA 1015.1 1015.9 1017.3 1013.3 1011.8 1010.7 1010.2 1008.9 1015.6 1019.7 1018.3 1020.3 1014.7 MAX. QNH PRESSURE IN HPA 1021.4 1021.5 1028.7 1021.0 1017.1 1018.6 1014.8 1012.7 1021.3 1025.6 1024.0 1031.8 1031.8 DAY 11 9 8 11 21 13 7 29 20 14 29 3 MIN. QNH PRESSURE IN HPA 1003.6 1003.7 1008.7 1004.3 999.2 1006.4 1006.3 1001.0 1007.5 1010.6 1004.9 1011.4 999.2 DAY 23 15 6 3 15 17 23 3 5 21 23 15 MEAN QFF PRESSURE IN HPA 1017.2 1017.0 1015.7 1010.8 1006.8 1002.6 1001.3 999.0 1008.2 1014.9 1017.5 1024.1 1011.2 MAX. QFF PRESSURE IN HPA 1025.6 1024.6 1030.3 1021.3 1012.3 1012.3 1006.8 1003.1 1016.0 1023.4 1026.4 1036.2 1036.2 DAY 1 24 8 5 21 13 7 29 20 14 30 3 MIN. QFF PRESSURE IN HPA 1003.8 1003.2 1002.8 1000.6 994.7 997.1 997.3 989.9 998.5 1005.6 1003.5 1014.6 989.9 DAY 23 15 6 3 15 24 23 3 5 3 23 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 889.1 889.6 890.8 887.1 885.9 884.7 883.8 882.9 889.2 893.1 892.1 893.8 888.5 MAX. QFE PRESSURE IN HPA 895.2 894.2 901.9 893.8 890.8 891.5 888.0 886.7 895.0 899.0 897.3 903.6 903.6 DAY 11 9 8 11 28 13 7 29 29 14 29 3 MIN. QFE PRESSURE IN HPA 878.4 879.0 882.7 879.8 875.7 880.7 880.6 875.1 881.8 884.6 883.2 886.1 875.1 DAY 23 15 30 23 15 23 22 3 5 21 23 15 MEAN QNH PRESSURE IN HPA 1015.5 1016.0 1017.4 1013.3 1011.9 1010.6 1009.6 1008.5 1015.6 1020.0 1018.8 1020.8 1014.8 MAX. QNH PRESSURE IN HPA 1022.3 1021.2 1029.8 1020.7 1017.4 1018.2 1014.3 1012.8 1022.1 1026.5 1024.6 1031.7 1031.7 DAY 11 9 8 11 28 13 7 29 29 14 29 3 MIN. QNH PRESSURE IN HPA 1003.6 1004.3 1008.4 1005.1 1000.6 1006.1 1006.0 999.9 1007.4 1010.5 1008.9 1012.2 999.9 DAY 23 15 30 23 15 23 22 3 5 21 23 15 MEAN QFF PRESSURE IN HPA 1018.2 1018.0 1016.8 1011.4 1007.5 1003.1 1001.2 999.4 1009.3 1016.5 1019.0 1025.4 1012.2 MAX. QFF PRESSURE IN HPA 1025.7 1025.3 1032.2 1021.7 1013.0 1011.9 1006.6 1004.2 1017.7 1025.0 1028.2 1037.2 1037.2 DAY 11 24 8 5 3 13 7 30 29 14 29 18 MIN. QFF PRESSURE IN HPA 1004.4 1006.1 1005.4 1001.2 997.0 997.3 997.4 989.0 999.1 1006.6 1009.4 1017.3 989.0 DAY 23 15 6 23 11 24 22 3 5 21 23 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 889.5 890.4 892.1 888.7 887.5 886.7 886.1 885.1 891.3 894.3 892.8 894.4 889.9 MAX. QFE PRESSURE IN HPA 895.4 896.0 903.2 895.8 892.7 893.0 890.2 888.6 896.7 899.6 898.3 903.6 903.6 DAY 11 9 8 11 22 13 6 29 29 14 29 3 MIN. QFE PRESSURE IN HPA 879.3 881.6 883.7 880.0 877.3 882.9 882.8 877.1 882.8 884.7 883.4 886.9 877.1 DAY 23 14 30 16 15 17 10 3 5 21 22 15 MEAN QNH PRESSURE IN HPA 1016.0 1016.9 1018.9 1015.1 1013.7 1012.8 1012.1 1011.0 1017.9 1021.2 1019.6 1021.4 1016.4 MAX. QNH PRESSURE IN HPA 1022.5 1023.2 1031.2 1023.0 1019.5 1019.9 1016.7 1015.0 1024.0 1027.2 1025.8 1031.7 1031.7 DAY 11 9 8 11 22 13 6 29 29 14 29 3 MIN. QNH PRESSURE IN HPA 1004.6 1007.2 1009.5 1005.4 1002.4 1008.6 1008.5 1002.1 1008.5 1010.6 1009.2 1013.1 1002.1 DAY 23 14 30 16 15 17 10 3 5 21 22 15 MEAN QFF PRESSURE IN HPA 1019.0 1019.0 1018.3 1013.0 1009.1 1005.2 1003.9 1001.8 1011.5 1017.5 1019.6 1026.1 1013.7 MAX. QFF PRESSURE IN HPA 1026.0 1026.5 1033.7 1024.1 1015.2 1014.1 1009.5 1005.8 1019.0 1025.7 1029.1 1038.3 1038.3 DAY 29 24 8 5 22 13 6 6 19 14 29 18 MIN. QFF PRESSURE IN HPA 1005.3 1006.7 1005.8 1003.2 997.8 999.9 1000.6 991.6 1000.4 1006.2 1009.2 1017.3 991.6 DAY 23 22 30 16 12 23 1 3 5 21 22 9 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 889.5 890.4 892.4 889.1 887.8 887.4 887.1 885.9 892.0 894.6 892.8 894.6 890.3 MAX. QFE PRESSURE IN HPA 895.7 896.5 903.4 896.4 892.6 894.1 891.4 889.0 897.2 900.0 898.6 903.6 903.6 DAY 29 9 8 11 22 5 6 29 19 14 29 3 MIN. QFE PRESSURE IN HPA 879.7 877.5 883.0 881.7 877.9 883.7 883.9 878.9 883.0 884.4 881.0 887.2 877.5 DAY 23 22 30 16 12 8 22 3 5 21 22 15 MEAN QNH PRESSURE IN HPA 1015.9 1017.0 1019.1 1015.5 1014.1 1013.6 1013.3 1012.0 1018.7 1021.6 1019.6 1021.6 1016.8 MAX. QNH PRESSURE IN HPA 1022.9 1023.8 1031.4 1023.6 1019.4 1021.1 1018.1 1015.4 1024.5 1027.6 1026.1 1031.7 1031.7 DAY 29 9 8 11 22 5 6 29 19 14 29 3 MIN. QNH PRESSURE IN HPA 1005.0 1002.6 1008.7 1007.3 1003.0 1009.5 1009.7 1004.1 1008.7 1010.3 1006.5 1013.4 1002.6 DAY 23 22 30 16 12 8 22 3 5 21 22 15 MEAN QFF PRESSURE IN HPA 1018.2 1018.2 1017.9 1013.0 1009.0 1005.5 1004.6 1002.2 1011.5 1017.0 1019.2 1025.7 1013.5 MAX. QFF PRESSURE IN HPA 1026.2 1026.6 1033.7 1024.3 1014.7 1015.0 1010.4 1006.2 1019.2 1025.7 1028.4 1036.6 1036.6 DAY 29 24 8 5 22 12 6 6 19 14 29 18 MIN. QFF PRESSURE IN HPA 1005.0 1000.7 1003.7 1004.4 996.4 1000.1 1001.1 993.7 999.9 1004.6 1004.2 1016.2 993.7 DAY 23 22 30 22 12 23 14 3 5 21 22 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.8 -1.7 8.3 14.6 17.5 23.8 28.4 26.7 23.1 15.7 7.2 4.0 13.7 MINIMUN AIR TEMPERATURE (C) -6.0 -5.3 2.2 7.5 11.0 15.8 20.9 19.5 15.5 8.6 2.3 -0.6 7.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 14 8 0 0 0 0 22 DAYS WITH MINIMUM TEMP. <=-4 18 12 1 0 0 0 0 0 0 0 0 6 37 DAYS WITH FREEZING MIN.<= 0 28 24 7 1 0 0 0 0 0 0 9 19 88 TEMPERATURE RECORDS LOWEST(C) -14.8 -15.8 -4.2 -2.2 6.0 10.6 17.4 14.2 12.2 0.6 -2.8 -6.4 -15.8 DAY 26 13 26 6 7 3 9 30 29 23 25 30 MAXIMUM AIR TEMPERATURE (C) 1.4 2.8 14.9 22.5 24.7 31.9 36.5 35.0 31.3 23.5 13.1 10.2 20.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 3 0 21 31 28 21 2 0 0 106 DAYS WITH MAXIMUM TEMP. <= 0 10 10 0 0 0 0 0 0 0 0 0 0 20 TEMPERATURE RECORDS HIGHEST(C) 7.6 15.0 23.4 33.2 29.6 38.8 40.4 39.6 37.6 30.6 24.6 21.2 40.4 DAY 1 28 31 24 27 16 16 6 11 13 1 4 DIF. BETWEEN (MAX.-MIN.) (C) 7.4 8.1 12.7 15.0 13.7 16.1 15.6 15.5 15.8 14.9 10.8 10.8 13.0 MEAN DAILY TEMP. (MDT) (C) -2.3 -1.2 8.5 15.0 17.9 23.8 28.7 27.2 23.4 16.1 7.7 4.8 14.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 4.7 1.7 93.1 237.2 193.8 76.9 0.6 0.0 0.0 608.0 HEATING DEG. DAYS(BASE 18 0C) 629.6 538.9 294.4 105.7 33.6 0.5 0.0 0.0 0.0 81.4 310.2 408.8 2403.1 DEWPOINT (MEAN C) -6.2 -5.9 -1.2 2.7 7.7 7.9 9.6 9.8 6.1 1.9 0.6 -1.1 2.6 MIXING RATIO (G/KG) 2.83 2.94 4.08 5.50 7.56 7.71 8.76 8.88 6.87 5.26 4.59 4.04 5.75 VAPOUR PRESSURE (HPA) 4.04 4.18 5.78 7.80 10.68 10.85 12.29 12.47 9.71 7.49 6.55 5.77 8.13 SATURATION DEF. (HPA) 1.17 1.56 5.85 10.23 10.23 20.34 28.04 24.41 19.91 11.55 4.07 2.79 11.68 RELATIVE HUMIDITY (MEAN %) 78 74 56 49 57 40 34 38 38 44 67 71 54 RELATIVE HUMIDITY (MAX. %) 89 87 79 73 79 59 52 57 58 64 85 86 72 RELATIVE HUMIDITY (MIN. %) 64 60 34 26 34 22 18 20 19 25 47 50 35 RELATIVE HUMIDITY (MEAN% 03UTC) 85 83 75 70 75 56 49 55 54 61 81 84 69 RELATIVE HUMIDITY (MEAN% 09UTC) 70 64 45 37 43 29 24 29 29 34 56 60 43 RELATIVE HUMIDITY (MEAN% 15UTC) 76 70 41 34 46 27 23 26 27 33 59 64 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 38.7 38.7 34.4 27.1 53.3 1.6 0.8 8.3 7.6 2.6 43.4 14.3 270.8 DAYS WITH PRECIPITATION >=10 1 1 1 0 2 0 0 0 0 0 2 0 7 DAYS WITH PRECIPITATION >= 5 3 2 3 3 5 0 0 1 1 0 3 1 22 DAYS WITH PRECIPITATION >= 1 6 7 5 5 10 0 0 2 2 2 6 5 50 DAYS WITH PRECIPITATION 9 10 7 6 13 3 2 2 2 2 8 5 69 GREATEST DAILY PRECIPITATION 17.0 19.0 15.0 9.0 15.0 0.9 0.4 7.0 6.0 1.6 23.0 5.4 23.0 DAY 23 21 5 15 3 4 24 12 18 8 8 23 DAY WITH THUNDER STORM 0 0 0 2 11 4 4 0 2 4 1 0 28 DAYS WITH SNOW OR SLEET 8 7 3 0 0 0 0 0 0 0 0 1 19 DAYS WITH DUST 0 0 0 0 0 1 0 0 0 1 0 0 2 WIND DIRECTION (PREVAILING) 315 45 270 90 90 45 45 45 45 90 45 270 45 PREVAILING WIND SPEED(KNOTS) 4.5 8.5 9.3 5.0 4.1 9.1 9.4 9.4 9.0 2.6 7.1 5.4 8.6 PREVAILING WIND PERCENT 4.8 10.7 14.5 13.8 18.5 26.7 45.2 47.2 25.0 11.7 6.3 4.0 18.1 CALMS PERCENT OF WIND 77.4 58.0 38.3 37.1 33.9 25.0 19.0 19.4 44.2 54.8 77.9 81.9 47.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 18 51 253 31 42 48 57 59 44 16 73 229 50 VECTOR WIND MAGNITUDE(KNOTS) 0.1 0.6 2.0 0.3 1.1 2.3 5.0 5.7 2.5 0.4 0.3 0.2 1.3 WIND STEADINESES (MEAN %) 10.0 26.1 43.5 7.1 26.2 40.4 76.9 86.4 64.1 15.4 25.0 22.2 36.1 WIND SPEED (MEAN KNOTS) 1.0 2.3 4.6 4.2 4.2 5.7 6.5 6.6 3.9 2.6 1.2 0.9 3.6 FASTEST WIND DIRECTION 270 40 250 230 240 250 60 60 360 360 280 260 360 FASTEST WIND SPEED (KNOTS) 17 16 27 23 23 23 19 25 31 25 14 12 31 DAY 23 6 22 2 1 6 2 3 18 17 23 17 DAYS WITH SKY CLEAR (0-2)/8 8 13 12 9 11 26 27 31 29 21 16 19 222 DAYS WITH P.CLOUDY (3-6)/8 9 5 10 20 16 4 4 0 1 10 8 10 97 DAYS WITH CLOUDY (7-8)/8 14 10 9 1 4 0 0 0 0 0 6 2 46 DAYS WITH VISIBILITY =< 2 KM 6 3 0 0 0 0 0 0 0 0 2 0 11 DURATION OF SUNSHINE HOURS 113.3 166.6 227.1 270.0 271.6 365.4 351.8 373.9 315.5 266.4 191.3 192.5 3105.4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 892.9 891.6 888.3 890.8 889.3 886.3 885.5 886.6 888.7 893.5 894.7 894.8 890.2 MAX. QFE PRESSURE IN HPA 901.1 903.2 896.4 903.1 895.2 892.8 891.4 892.8 894.9 904.1 900.8 905.5 905.5 DAY-HOUR 13- 6 16- 6 26- 6 6- 6 22- 6 8- 6 28- 3 29-21 7- 6 23- 6 23- 9 29- 6 MIN. QFE PRESSURE IN HPA 878.2 880.3 879.5 880.1 878.9 875.7 875.2 878.0 880.7 881.2 887.1 881.5 875.2 DAY-HOUR 23- 3 1-15 23-15 2-12 3-12 20-12 5-15 7-15 11-15 20-12 5-12 23-21 MEAN QNH PRESSURE IN HPA 1019.7 1018.3 1014.6 1017.4 1015.7 1012.4 1011.5 1012.7 1015.1 1020.4 1021.8 1021.8 1016.8 MAX. QNH PRESSURE IN HPA 1028.9 1031.2 1023.6 1031.1 1022.3 1019.6 1018.1 1019.6 1022.0 1032.2 1028.5 1033.8 1033.8 DAY-HOUR 13- 6 16- 6 26- 6 6- 6 22- 6 8- 6 28- 3 29-21 7- 6 23- 6 23- 9 29- 6 MIN. QNH PRESSURE IN HPA 1003.4 1005.7 1004.8 1005.5 1004.1 1000.6 1000.0 1003.1 1006.1 1006.7 1013.3 1007.0 1000.0 DAY-HOUR 23- 3 1-15 23-15 2-12 3-12 20-12 5-15 7-15 11-15 20-12 5-12 23-21 MEAN QFF PRESSURE IN HPA 1025.1 1023.2 1014.3 1014.1 1011.0 1004.8 1001.9 1003.8 1007.9 1016.7 1022.1 1023.7 1014.0 MAX. QFF PRESSURE IN HPA 1037.4 1039.8 1027.9 1034.1 1018.7 1013.7 1009.1 1013.4 1016.5 1033.3 1030.7 1039.0 1039.8 DAY-HOUR 29- 6 16- 6 26- 6 6- 3 22- 3 9- 3 28- 3 30- 6 7- 3 23- 6 25- 6 29- 6 MIN. QFF PRESSURE IN HPA 1008.8 1008.9 1002.2 999.9 999.9 991.7 989.9 993.1 997.1 1000.7 1011.4 1008.8 989.9 DAY-HOUR 23- 3 1-15 23-15 2-12 3-12 20-12 5-12 7-12 11-12 20-12 5-12 23-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 893.0 891.4 888.5 891.3 889.6 887.2 886.3 887.4 889.3 893.8 894.9 894.9 890.6 MAX. QFE PRESSURE IN HPA 899.1 901.2 893.5 902.5 894.2 892.6 890.2 892.2 893.8 902.2 899.5 904.6 904.6 DAY 14 16 26 6 22 9 28 30 7 23 15 31 MIN. QFE PRESSURE IN HPA 879.4 881.4 880.1 885.4 880.3 879.7 878.9 881.6 884.2 883.9 888.1 882.0 878.9 DAY 23 2 24 2 3 21 6 8 12 20 6 24 MEAN QNH PRESSURE IN HPA 1019.8 1018.1 1014.8 1017.9 1016.0 1013.4 1012.4 1013.6 1015.7 1020.8 1021.9 1021.9 1017.2 MAX. QNH PRESSURE IN HPA 1026.6 1029.0 1020.4 1030.4 1021.2 1019.4 1016.7 1019.0 1020.7 1030.1 1027.1 1032.8 1032.8 DAY 14 16 26 6 22 9 28 30 7 23 15 31 MIN. QNH PRESSURE IN HPA 1004.7 1006.9 1005.5 1011.4 1005.7 1005.0 1004.1 1007.2 1010.1 1009.7 1014.4 1007.6 1004.1 DAY 23 2 24 2 3 21 6 8 12 20 6 24 MEAN QFF PRESSURE IN HPA 1024.8 1022.6 1014.3 1014.3 1011.0 1005.7 1002.5 1004.2 1008.1 1016.5 1021.7 1023.1 1014.1 MAX. QFF PRESSURE IN HPA 1034.5 1036.6 1023.9 1032.1 1017.8 1013.6 1007.5 1012.2 1014.6 1029.9 1028.5 1037.2 1037.2 DAY 29 16 26 6 22 9 9 30 7 23 25 31 MIN. QFF PRESSURE IN HPA 1010.0 1009.2 1005.2 1005.4 1000.1 995.8 993.9 996.5 1000.8 1003.9 1012.6 1009.0 993.9 DAY 23 2 24 2 3 21 6 8 12 20 6 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 893.0 891.6 888.9 892.1 890.3 888.1 887.1 888.2 890.3 894.4 895.3 895.2 891.2 MAX. QFE PRESSURE IN HPA 899.3 902.1 895.0 903.0 895.0 892.6 891.4 892.3 894.6 903.2 899.8 904.7 904.7 DAY 13 16 26 6 22 8 28 30 7 23 25 31 MIN. QFE PRESSURE IN HPA 878.2 882.6 880.4 885.5 880.7 880.7 879.4 882.5 885.0 883.9 890.0 882.5 878.2 DAY 23 1 24 2 3 20 6 8 12 20 6 24 MEAN QNH PRESSURE IN HPA 1019.8 1018.3 1015.3 1018.8 1016.8 1014.4 1013.3 1014.5 1016.8 1021.4 1022.4 1022.3 1017.9 MAX. QNH PRESSURE IN HPA 1026.9 1030.0 1022.1 1031.0 1022.1 1019.4 1018.1 1019.1 1021.6 1031.2 1027.4 1032.9 1032.9 DAY 13 16 26 6 22 8 28 30 7 23 25 31 MIN. QNH PRESSURE IN HPA 1003.4 1008.3 1005.8 1011.5 1006.1 1006.1 1004.7 1008.2 1010.9 1009.7 1016.5 1008.2 1003.4 DAY 23 1 24 2 3 20 6 8 12 20 6 24 MEAN QFF PRESSURE IN HPA 1025.5 1023.7 1015.5 1016.1 1012.5 1007.1 1004.0 1005.8 1010.1 1018.4 1023.2 1024.6 1015.5 MAX. QFF PRESSURE IN HPA 1035.6 1038.7 1026.7 1034.1 1018.7 1013.7 1009.1 1013.1 1016.5 1033.3 1030.4 1038.0 1038.7 DAY 29 16 26 6 22 9 28 30 7 23 25 31 MIN. QFF PRESSURE IN HPA 1008.8 1011.0 1005.8 1007.1 1001.6 997.3 995.2 998.5 1003.2 1004.9 1014.4 1010.3 995.2 DAY 23 2 24 26 3 20 6 8 12 20 5 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 894.1 892.8 889.7 892.4 890.6 887.9 887.2 888.3 890.8 895.4 896.3 896.4 891.8 MAX. QFE PRESSURE IN HPA 901.1 903.2 896.4 903.1 895.2 892.8 891.3 892.2 894.9 904.1 900.5 905.5 905.5 DAY 13 16 26 6 22 8 28 27 7 23 23 29 MIN. QFE PRESSURE IN HPA 879.3 883.3 881.2 885.1 881.7 879.9 879.9 882.4 885.9 884.3 890.7 884.7 879.3 DAY 23 1 24 2 3 20 6 8 12 20 5 24 MEAN QNH PRESSURE IN HPA 1021.0 1019.6 1016.2 1019.2 1017.2 1014.1 1013.4 1014.6 1017.4 1022.5 1023.5 1023.6 1018.5 MAX. QNH PRESSURE IN HPA 1028.9 1031.2 1023.6 1031.1 1022.3 1019.6 1018.0 1019.0 1022.0 1032.2 1028.2 1033.8 1033.8 DAY 13 16 26 6 22 8 28 27 7 23 23 29 MIN. QNH PRESSURE IN HPA 1004.6 1009.0 1006.7 1011.1 1007.3 1005.3 1005.3 1008.0 1011.9 1010.2 1017.3 1010.6 1004.6 DAY 23 1 24 2 3 20 6 8 12 20 5 24 MEAN QFF PRESSURE IN HPA 1026.8 1024.9 1016.2 1016.3 1012.5 1006.8 1004.1 1006.1 1010.4 1019.2 1024.3 1026.0 1016.1 MAX. QFF PRESSURE IN HPA 1037.4 1039.8 1027.9 1033.4 1018.4 1013.0 1008.9 1013.4 1016.3 1033.3 1030.7 1039.0 1039.8 DAY 29 16 26 6 22 8 8 30 7 23 25 29 MIN. QFF PRESSURE IN HPA 1009.7 1013.2 1006.8 1006.1 1004.3 996.1 995.1 998.4 1003.9 1004.2 1014.9 1012.1 995.1 DAY 23 1 23 2 3 20 6 8 12 20 5 24 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 893.2 892.1 888.4 890.8 889.2 886.1 885.5 886.5 888.7 893.6 895.0 895.1 890.3 MAX. QFE PRESSURE IN HPA 900.2 902.0 895.4 900.6 893.7 891.6 889.5 890.7 892.6 902.1 900.8 904.2 904.2 DAY 13 15 26 6 21 8 28 30 9 23 23 29 MIN. QFE PRESSURE IN HPA 880.3 882.0 882.2 882.0 880.0 878.0 878.4 880.9 884.1 881.9 888.9 884.7 878.0 DAY 23 1 24 2 3 20 5 8 12 20 5 24 MEAN QNH PRESSURE IN HPA 1020.1 1018.9 1014.7 1017.4 1015.6 1012.2 1011.5 1012.6 1015.1 1020.5 1022.1 1022.2 1016.9 MAX. QNH PRESSURE IN HPA 1027.9 1029.9 1022.5 1028.3 1020.6 1018.3 1016.0 1017.3 1019.4 1030.0 1028.5 1032.3 1032.3 DAY 13 15 26 6 21 8 28 30 9 23 23 29 MIN. QNH PRESSURE IN HPA 1005.7 1007.6 1007.8 1007.6 1005.4 1003.1 1003.6 1006.4 1009.9 1007.5 1015.3 1010.6 1003.1 DAY 23 1 24 2 3 20 5 8 12 20 5 24 MEAN QFF PRESSURE IN HPA 1025.2 1023.5 1014.0 1013.6 1010.4 1004.5 1001.8 1003.5 1007.5 1016.4 1022.1 1023.7 1013.8 MAX. QFF PRESSURE IN HPA 1035.5 1038.0 1026.1 1029.7 1016.3 1011.9 1006.6 1011.0 1012.6 1030.2 1029.0 1036.8 1038.0 DAY 29 15 26 6 22 8 28 30 7 23 25 29 MIN. QFF PRESSURE IN HPA 1010.2 1010.8 1005.2 1002.6 1001.7 993.7 992.8 995.7 1001.0 1001.4 1013.3 1010.8 992.8 DAY 23 1 23 2 3 20 5 8 11 20 5 24 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 892.1 890.8 886.8 889.0 887.6 884.3 883.4 884.3 886.5 891.8 893.5 893.5 888.6 MAX. QFE PRESSURE IN HPA 898.6 900.5 893.6 898.9 892.8 890.6 887.2 888.5 890.3 900.6 900.4 902.9 902.9 DAY 13 16 26 5 21 8 28 30 7 23 23 29 MIN. QFE PRESSURE IN HPA 880.8 881.1 880.2 880.1 878.9 875.7 875.7 878.5 881.1 881.2 887.1 884.0 875.7 DAY 23 1 23 2 3 20 5 8 11 20 5 23 MEAN QNH PRESSURE IN HPA 1018.9 1017.4 1013.0 1015.4 1013.9 1010.2 1009.2 1010.2 1012.6 1018.5 1020.5 1020.4 1015.0 MAX. QNH PRESSURE IN HPA 1026.1 1028.2 1020.5 1026.4 1019.6 1017.2 1013.4 1014.8 1016.8 1028.3 1028.1 1030.9 1030.9 DAY 13 16 26 5 21 8 28 30 7 23 23 29 MIN. QNH PRESSURE IN HPA 1006.3 1006.6 1005.6 1005.5 1004.1 1000.6 1000.6 1003.7 1006.6 1006.7 1013.3 1009.8 1000.6 DAY 23 1 23 2 3 20 5 8 11 20 5 23 MEAN QFF PRESSURE IN HPA 1023.8 1021.8 1012.3 1011.7 1008.9 1002.4 999.3 1000.9 1005.0 1014.2 1020.2 1021.6 1011.8 MAX. QFF PRESSURE IN HPA 1033.3 1035.7 1023.6 1027.4 1015.4 1011.0 1004.1 1008.6 1010.3 1027.7 1028.2 1035.1 1035.7 DAY 29 16 26 5 21 8 8 30 7 23 23 29 MIN. QFF PRESSURE IN HPA 1010.2 1009.5 1003.1 999.9 999.9 991.7 989.9 993.1 997.1 1000.7 1011.4 1010.2 989.9 DAY 23 1 23 2 3 20 5 7 11 20 5 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 892.3 891.0 887.1 889.1 888.0 884.1 883.1 884.0 886.5 891.9 893.9 893.9 888.7 MAX. QFE PRESSURE IN HPA 899.1 900.4 892.3 899.5 892.8 890.7 887.0 888.8 890.5 900.5 900.7 902.8 902.8 DAY 9 15 26 5 21 8 28 29 7 23 23 30 MIN. QFE PRESSURE IN HPA 882.3 880.3 879.5 882.7 880.2 875.9 875.2 878.0 880.7 883.5 887.6 882.9 875.2 DAY 24 1 23 30 3 20 5 7 11 20 5 23 MEAN QNH PRESSURE IN HPA 1019.1 1017.6 1013.2 1015.5 1014.3 1009.9 1008.8 1009.8 1012.7 1018.6 1020.8 1020.8 1015.1 MAX. QNH PRESSURE IN HPA 1026.6 1028.1 1019.1 1027.1 1019.6 1017.3 1013.2 1015.2 1017.1 1028.2 1028.4 1030.8 1030.8 DAY 9 15 26 5 21 8 28 29 7 23 23 30 MIN. QNH PRESSURE IN HPA 1007.9 1005.7 1004.8 1008.4 1005.6 1000.8 1000.0 1003.1 1006.1 1009.3 1013.8 1008.6 1000.0 DAY 24 1 23 30 3 20 5 7 11 20 5 23 MEAN QFF PRESSURE IN HPA 1024.8 1022.7 1013.3 1012.6 1009.9 1002.5 999.4 1001.2 1006.0 1015.5 1021.6 1023.1 1012.7 MAX. QFF PRESSURE IN HPA 1034.5 1037.0 1022.7 1028.8 1015.5 1011.5 1004.2 1008.8 1011.9 1028.7 1029.9 1036.2 1037.0 DAY 26 15 26 5 21 8 8 30 30 23 23 30 MIN. QFF PRESSURE IN HPA 1012.7 1008.9 1002.2 1003.7 1001.9 992.0 990.0 993.3 997.9 1005.3 1012.4 1011.4 990.0 DAY 3 1 23 30 3 20 5 7 11 20 5 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 892.8 891.6 888.4 890.8 889.5 886.0 885.3 886.4 888.5 893.3 894.5 894.7 890.1 MAX. QFE PRESSURE IN HPA 899.4 901.4 893.0 901.6 894.5 892.2 889.1 891.9 892.9 900.8 900.5 904.1 904.1 DAY 13 15 17 5 21 8 8 29 7 23 23 30 MIN. QFE PRESSURE IN HPA 883.1 881.6 880.7 884.5 882.4 878.2 877.4 880.8 883.4 884.9 887.5 881.6 877.4 DAY 24 1 23 30 3 20 5 7 11 19 5 23 MEAN QNH PRESSURE IN HPA 1019.6 1018.3 1014.7 1017.4 1016.0 1012.1 1011.3 1012.5 1014.9 1020.1 1021.5 1021.7 1016.7 MAX. QNH PRESSURE IN HPA 1027.0 1029.2 1019.9 1029.4 1021.5 1019.0 1015.5 1018.6 1019.7 1028.5 1028.2 1032.2 1032.2 DAY 13 15 17 5 21 8 8 29 7 23 23 30 MIN. QNH PRESSURE IN HPA 1008.8 1007.2 1006.1 1010.4 1008.0 1003.4 1002.5 1006.3 1009.2 1010.8 1013.7 1007.2 1002.5 DAY 24 1 23 30 3 20 5 7 11 19 5 23 MEAN QFF PRESSURE IN HPA 1025.3 1023.5 1014.6 1014.4 1011.3 1004.7 1002.0 1004.0 1008.0 1016.7 1022.3 1024.1 1014.2 MAX. QFF PRESSURE IN HPA 1034.7 1037.9 1023.5 1031.4 1017.3 1013.1 1007.0 1012.3 1013.7 1028.7 1029.3 1037.1 1037.9 DAY 28 15 26 5 21 8 8 29 30 23 23 30 MIN. QFF PRESSURE IN HPA 1014.2 1010.4 1004.4 1005.8 1005.8 994.3 992.4 996.4 1001.0 1006.0 1012.0 1009.6 992.4 DAY 3 1 23 30 2 20 5 7 11 19 5 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 892.6 891.7 888.6 891.3 889.9 886.9 886.1 887.5 889.1 893.7 894.7 894.9 890.6 MAX. QFE PRESSURE IN HPA 899.4 901.2 893.7 902.3 894.5 892.6 890.2 892.8 893.5 901.6 900.1 904.5 904.5 DAY 13 15 5 5 21 8 8 29 6 22 23 30 MIN. QFE PRESSURE IN HPA 880.8 881.4 879.7 885.2 882.2 879.4 878.8 881.6 884.1 884.1 887.1 881.5 878.8 DAY 22 1 23 30 3 20 5 7 11 19 5 23 MEAN QNH PRESSURE IN HPA 1019.4 1018.4 1015.0 1018.0 1016.4 1013.0 1012.2 1013.7 1015.5 1020.6 1021.7 1021.9 1017.2 MAX. QNH PRESSURE IN HPA 1027.0 1029.0 1020.6 1030.2 1021.5 1019.4 1016.7 1019.6 1020.4 1029.4 1027.8 1032.7 1032.7 DAY 13 15 5 5 21 8 8 29 6 22 23 30 MIN. QNH PRESSURE IN HPA 1006.3 1006.9 1005.0 1011.2 1007.8 1004.7 1004.0 1007.2 1009.9 1009.9 1013.3 1007.0 1004.0 DAY 22 1 23 30 3 20 5 7 11 19 5 23 MEAN QFF PRESSURE IN HPA 1024.5 1022.9 1014.2 1014.3 1011.3 1005.2 1002.4 1004.7 1008.0 1016.6 1021.8 1023.5 1014.1 MAX. QFF PRESSURE IN HPA 1034.8 1036.7 1023.7 1031.9 1017.5 1013.5 1007.9 1012.6 1014.1 1028.8 1029.4 1037.5 1037.5 DAY 28 15 25 5 21 8 8 29 6 22 24 30 MIN. QFF PRESSURE IN HPA 1011.8 1009.4 1003.0 1005.6 1003.8 994.8 993.9 996.4 1001.1 1004.1 1011.7 1008.8 993.9 DAY 22 1 23 30 2 20 5 7 11 19 5 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1987-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.4 0.8 7.4 14.1 19.0 25.1 27.9 27.8 23.3 16.3 8.0 2.4 14.2 MINIMUN AIR TEMPERATURE (C) -5.6 -4.2 1.0 6.6 10.6 15.5 19.2 19.1 14.4 8.7 2.2 -1.8 7.1 DAYS WITH MINIMUM TEMP. >=21 0.0 0.0 0.0 0.0 0.0 0.4 7.6 7.3 0.1 0.0 0.0 0.0 15.4 DAYS WITH MINIMUM TEMP. <=-4 16.7 11.9 2.8 0.1 0.0 0.0 0.0 0.0 0.0 0.0 1.8 8.3 41.6 DAYS WITH FREEZING MIN.<= 0 26.8 23.1 11.6 1.2 0.1 0.0 0.0 0.0 0.0 0.0 8.9 20.3 92.0 TEMPERATURE RECORDS LOWEST(C) -22.7 -25.6 -13.6 -4.2 -0.4 2.0 10.6 10.0 6.0 0.6 -16.6 -20.6 -25.6 YEAR-DAY 89-16 89- 7 91-11 4- 6 92- 5 98-13 99-15 92-12 92-30 5-23 1-20 90-29 89- 7 MAXIMUM AIR TEMPERATURE (C) 2.9 5.9 13.2 20.4 25.5 32.1 34.9 35.1 30.8 23.1 13.6 6.6 20.3 DAYS WITH MAXIMUM TEMP. >=30 0.0 0.0 0.0 0.5 4.9 21.9 29.4 29.1 18.7 1.9 0.0 0.0 106.4 DAYS WITH MAXIMUM TEMP. <= 0 8.7 5.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.1 17.5 TEMPERATURE RECORDS HIGHEST(C) 18.2 19.4 28.0 33.2 37.5 42.5 41.5 42.6 39.6 33.4 24.8 21.2 42.6 YEAR-DAY 87-31 87-25 4- 5 5-24 99-31 1-23 90-27 3-12 98- 1 2- 9 90- 9 5- 4 3-12 DIF. BETWEEN (MAX.-MIN.) (C) 8.5 10.1 12.2 13.8 14.9 16.6 15.7 16.0 16.4 14.4 11.4 8.4 13.2 MEAN DAILY TEMP. (MDT) (C) -1.4 0.8 7.1 13.5 18.0 23.8 27.0 27.1 22.6 15.9 7.9 2.4 13.7 STANDARD DEVIATION OF MDT(C) 3.93 4.04 2.06 1.41 1.50 1.31 0.87 1.35 1.10 1.77 1.64 2.06 1.92 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.5 8.2 91.9 187.9 190.1 65.1 1.9 0.0 0.0 545.6 HEATING DEG. DAYS(BASE 18 0C) 600.7 485.1 338.3 139.8 39.4 0.9 0.0 0.0 3.2 82.7 302.7 482.4 2475.2 DEWPOINT (MEAN C) -6.0 -5.6 -1.8 2.7 5.9 7.1 9.4 9.1 5.5 3.0 0.6 -2.8 2.3 MIXING RATIO (G/KG) 2.93 3.03 3.95 5.45 6.80 7.42 8.63 8.55 6.67 5.52 4.69 3.65 5.61 VAPOUR PRESSURE (HPA) 4.18 4.31 5.61 7.71 9.61 10.44 12.10 12.01 9.43 7.86 6.69 5.22 7.93 SATURATION DEF. (HPA) 1.76 2.73 5.41 9.50 13.71 23.23 27.38 27.42 20.92 11.87 4.72 2.45 12.59 RELATIVE HUMIDITY (MEAN %) 73 66 57 51 48 36 35 35 36 46 64 71 51 RELATIVE HUMIDITY (MAX. %) 86 83 80 76 72 56 52 54 56 65 82 85 71 RELATIVE HUMIDITY (MIN. %) 57 48 38 32 29 21 21 20 20 30 46 56 35 RELATIVE HUMIDITY (MEAN% 03UTC) 84 81 78 73 70 55 51 53 54 63 80 83 69 RELATIVE HUMIDITY (MEAN% 09UTC) 66 57 48 42 38 28 27 28 30 38 55 63 43 RELATIVE HUMIDITY (MEAN% 15UTC) 70 59 46 40 37 26 26 25 26 38 57 68 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 36.0 23.8 41.0 44.9 31.8 6.2 7.2 3.6 4.0 16.9 34.6 32.1 282.1 DAYS WITH PRECIPITATION >=10 1.0 0.5 1.3 1.3 0.8 0.1 0.2 0.1 0.1 0.5 1.1 0.9 7.9 DAYS WITH PRECIPITATION >= 5 2.5 1.4 2.6 3.2 2.3 0.4 0.3 0.3 0.3 1.1 2.3 2.1 18.8 DAYS WITH PRECIPITATION >= 1 5.9 4.6 6.7 7.1 6.2 1.6 1.2 0.8 1.2 2.8 4.9 5.3 48.3 DAYS WITH PRECIPITATION 10.2 8.9 10.4 11.1 10.4 4.1 2.1 1.6 1.8 5.1 7.3 8.2 81.2 GREATEST DAILY PRECIPITATION 32.2 21.1 47.0 31.0 25.0 12.0 36.0 11.0 15.0 32.0 37.0 37.0 47.0 YEAR-DAY 97-16 91-21 0-24 3-16 88-22 93- 1 97- 5 98- 3 89-19 89-30 93- 1 91- 9 0 DAY WITH THUNDER STORM 0.0 0.0 0.6 4.1 7.4 3.3 2.1 1.2 1.2 1.5 0.5 0.1 22.0 DAYS WITH SNOW OR SLEET 7.7 5.7 2.6 0.2 0.0 0.0 0.0 0.0 0.0 0.0 1.1 3.5 20.8 DAYS WITH DUST 0.0 0.1 0.1 0.5 0.6 0.7 0.2 0.1 0.5 0.4 0.1 0.0 3.3 WIND DIRECTION (PREVAILING) 45 45 270 270 45 45 45 45 45 45 45 45 45 PREVAILING WIND SPEED(KNOTS) 8.0 8.1 9.8 10.3 8.1 10.2 10.0 9.9 9.2 8.7 7.3 6.3 9.2 PREVAILING WIND PERCENT 5.4 7.2 10.2 10.6 12.2 20.5 34.0 32.0 21.1 11.8 5.2 4.1 14.3 CALMS PERCENT OF WIND 79.2 69.7 59.1 55.1 52.8 41.6 29.0 33.0 52.1 62.3 76.8 79.1 57.5 NO. OF WIND OBSERVATION 190.4 173.3 189.3 183.2 193.6 187.9 194.2 194.2 187.9 194.2 187.9 194.2 2270.3 VECTOR WIND DIRECTION (MEAN) 5 325 297 276 341 55 65 62 50 30 315 316 49 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.4 0.7 0.9 0.5 2.4 5.7 4.7 2.1 0.7 0.1 0.2 1.2 WIND STEADINESES (MEAN %) 23.1 19.0 21.2 23.7 13.2 46.2 83.8 78.3 56.8 25.0 6.7 16.7 35.3 WIND SPEED (MEAN KNOTS) 1.3 2.1 3.3 3.8 3.8 5.2 6.8 6.0 3.7 2.8 1.5 1.2 3.4 FASTEST WIND DIRECTION 270 120 230 240 240 280 280 320 300 270 260 210 270 FASTEST WIND SPEED (KNOTS) 43 41 39 39 39 29 35 31 39 33 31 27 43 YEAR-DAY 87-29 98- 1 4- 6 87-19 90- 2 88-13 90-27 1- 9 96- 3 92-26 95-11 94- 3 87 DAYS WITH SKY CLEAR (0-2)/8 9.9 10.1 10.2 8.3 14.1 24.8 27.1 27.1 27.4 19.0 13.8 10.2 202.0 DAYS WITH P.CLOUDY (3-6)/8 10.5 9.7 11.5 14.2 12.8 4.9 3.6 3.8 2.6 8.9 9.9 10.9 103.3 DAYS WITH CLOUDY (7-8)/8 10.5 8.5 9.3 7.6 4.1 0.2 0.3 0.1 0.1 3.1 6.2 9.9 59.9 DAYS WITH VISIBILITY =< 2 KM 2.2 1.6 0.6 0.2 0.1 0.0 0.1 0.0 0.1 0.2 0.8 2.3 8.2 DURATION OF SUNSHINE HOURS 124.1 156.3 193.8 224.5 285.3 343.7 361.8 348.8 309.1 243.7 174.7 125.3 2891.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1987-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 893.4 891.9 889.6 889.2 888.9 886.2 885.3 886.3 889.4 893.4 894.3 894.1 890.2 MAX. QFE PRESSURE IN HPA 907.0 908.3 906.0 903.1 900.3 898.9 894.5 898.0 901.0 906.0 909.0 909.0 909.0 YEAR-DAY 92-10 89- 8 90-17 5- 6 3- 1 93-22 96- 3 92-31 89-22 90-15 87-30 90-28 87-30 MIN. QFE PRESSURE IN HPA 875.1 871.9 873.5 876.5 874.5 872.1 874.9 875.1 878.6 881.2 875.9 873.6 871.9 YEAR-DAY 0-21 99-20 88- 4 97- 9 4-15 99-24 98- 5 4- 3 96-21 5-20 1-18 88-27 99-20 MEAN QNH PRESSURE IN HPA 1020.3 1018.6 1016.0 1015.6 1015.3 1012.3 1011.2 1012.4 1015.9 1020.3 1021.3 1021.0 1016.7 MAX. QNH PRESSURE IN HPA 1035.4 1036.9 1034.3 1031.1 1028.0 1026.4 1021.5 1025.4 1028.8 1034.3 1037.7 1037.7 1037.7 YEAR-DAY 92-10 89- 8 90-17 5- 6 3- 1 93-22 96- 3 92-31 89-22 90-15 87-30 90-28 87-30 MIN. QNH PRESSURE IN HPA 999.9 996.3 998.1 1001.5 999.2 996.6 999.7 999.9 1003.8 1006.7 1000.8 998.2 996.3 YEAR-DAY 0-21 99-20 88- 4 97- 9 4-15 99-24 98- 5 4- 3 96-21 5-20 1-18 88-27 99-20 MEAN QFF PRESSURE IN HPA 1023.1 1020.4 1015.7 1012.3 1009.7 1004.6 1002.6 1003.4 1009.3 1016.4 1021.6 1024.6 1013.6 MAX. QFF PRESSURE IN HPA 1043.3 1039.8 1036.3 1034.1 1027.2 1022.3 1012.7 1014.6 1023.5 1033.3 1039.5 1041.6 1043.3 YEAR-DAY 2-27 5-16 3- 2 5- 6 3- 1 93-22 2-29 2-31 3-23 5-23 1-20 3-11 2-27 MIN. QFF PRESSURE IN HPA 1001.4 998.0 997.3 999.2 994.7 988.5 989.9 989.0 995.8 1000.7 998.2 998.9 988.5 YEAR-DAY 0-21 1-21 3-26 3-26 4-15 1-17 5- 5 4- 3 3- 6 3-27 1-18 94- 3 1-17 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 892.8 890.8 889.8 889.2 888.7 886.8 886.3 887.1 890.4 893.7 894.1 894.3 890.3 MAX. QFE PRESSURE IN HPA 904.9 903.8 903.2 902.5 899.5 897.5 893.1 893.1 898.5 902.2 904.1 906.3 906.3 YEAR-DAY 2-27 2- 6 4- 9 5- 6 3- 1 93-22 0-31 1-11 3-23 93-20 0-17 3-12 3-12 MIN. QFE PRESSURE IN HPA 876.9 874.7 877.3 878.1 878.5 878.3 878.9 879.8 883.2 881.6 878.0 875.9 874.7 YEAR-DAY 0-21 1-21 1-25 2- 4 4-13 1-18 5- 6 4- 4 0- 1 3-29 1-18 2-21 1-21 MEAN QNH PRESSURE IN HPA 1019.6 1017.4 1016.3 1015.7 1015.1 1012.9 1012.4 1013.2 1016.9 1020.6 1021.1 1021.4 1016.9 MAX. QNH PRESSURE IN HPA 1033.1 1031.9 1031.2 1030.4 1027.1 1024.9 1020.0 1020.0 1026.0 1030.1 1032.2 1034.7 1034.7 YEAR-DAY 2-27 2- 6 4- 9 5- 6 3- 1 93-22 0-31 1-11 3-23 93-20 0-17 3-12 3-12 MIN. QNH PRESSURE IN HPA 1001.9 999.5 1002.4 1003.3 1003.7 1003.5 1004.1 1005.1 1008.9 1007.2 1003.1 1000.8 999.5 YEAR-DAY 0-21 1-21 1-25 2- 4 4-13 1-18 5- 6 4- 4 0- 1 3-29 1-18 2-21 1-21 MEAN QFF PRESSURE IN HPA 1022.8 1019.8 1015.6 1012.4 1010.0 1005.3 1003.3 1003.9 1009.4 1016.2 1021.1 1024.2 1013.7 MAX. QFF PRESSURE IN HPA 1040.6 1036.6 1034.0 1032.1 1026.0 1020.5 1011.1 1012.6 1021.8 1029.9 1036.2 1039.9 1040.6 YEAR-DAY 2-27 5-16 3- 2 5- 6 3- 1 93-22 2-29 1-12 3-23 5-23 1-20 3-12 2-27 MIN. QFF PRESSURE IN HPA 1003.9 999.0 998.4 1001.5 997.5 993.5 993.9 994.9 1000.0 1001.7 1000.4 1002.5 993.5 YEAR-DAY 0-21 1-21 2-27 3-26 4-13 1-18 5- 6 4- 4 0- 7 3-29 1-18 94- 4 1-18 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 893.6 892.2 890.3 890.3 890.2 888.0 887.1 888.2 891.0 894.4 894.9 894.3 891.2 MAX. QFE PRESSURE IN HPA 906.0 907.4 906.0 903.0 899.9 898.5 894.0 897.9 900.3 905.0 908.5 908.0 908.5 YEAR-DAY 92-10 89- 8 90-17 5- 6 3- 1 93-22 98-20 92-31 89-23 90-16 87-30 90-28 87-30 MIN. QFE PRESSURE IN HPA 875.1 873.0 876.0 878.7 878.7 876.7 879.2 880.9 882.9 882.0 875.9 873.6 873.0 YEAR-DAY 0-21 1-21 87-14 2- 4 4-13 99-25 95-16 97- 5 95-20 3-29 1-18 88-27 1-21 MEAN QNH PRESSURE IN HPA 1020.5 1018.9 1016.8 1016.8 1016.8 1014.3 1013.3 1014.5 1017.7 1021.4 1021.9 1021.4 1017.8 MAX. QNH PRESSURE IN HPA 1034.3 1035.9 1034.3 1031.0 1027.5 1026.0 1021.0 1025.3 1028.0 1033.2 1037.1 1036.6 1037.1 YEAR-DAY 92-10 89- 8 90-17 5- 6 3- 1 93-22 98-20 92-31 89-23 90-16 87-30 90-28 87-30 MIN. QNH PRESSURE IN HPA 999.9 997.6 1000.9 1003.9 1003.9 1001.7 1004.5 1006.4 1008.6 1007.6 1000.8 998.2 997.6 YEAR-DAY 0-21 1-21 87-14 2- 4 4-13 99-25 95-16 97- 5 95-20 3-29 1-18 88-27 1-21 MEAN QFF PRESSURE IN HPA 1025.8 1023.1 1017.7 1014.6 1012.3 1007.0 1004.7 1006.0 1011.4 1018.3 1022.6 1024.7 1015.7 MAX. QFF PRESSURE IN HPA 1048.0 1051.5 1041.2 1034.1 1027.2 1022.3 1014.6 1020.5 1025.9 1033.6 1043.0 1049.3 1051.5 YEAR-DAY 92-10 89- 8 90-17 5- 6 3- 1 93-22 87-11 92-31 89-23 90-16 87-30 90-28 89- 8 MIN. QFF PRESSURE IN HPA 1001.4 998.0 999.0 1003.0 998.3 992.1 994.3 996.0 1000.3 1002.9 998.2 1001.1 992.1 YEAR-DAY 0-21 1-21 1-25 93-20 4-13 99-25 95-16 97- 5 96- 8 3-29 1-18 88-27 99-25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1987-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 894.6 893.1 891.1 890.8 890.4 887.9 887.1 888.4 891.6 895.3 895.8 895.3 891.8 MAX. QFE PRESSURE IN HPA 907.0 908.3 905.5 903.1 900.3 898.9 894.5 898.0 901.0 906.0 909.0 909.0 909.0 YEAR-DAY 92-10 89- 8 90-17 5- 6 3- 1 93-22 96- 3 92-31 89-22 90-15 87-30 90-28 87-30 MIN. QFE PRESSURE IN HPA 876.8 873.8 874.6 878.7 880.2 876.7 879.0 880.6 883.0 884.3 876.4 874.6 873.8 YEAR-DAY 0-21 1-21 3-26 97- 9 4-16 99-25 98- 5 4- 3 96- 8 5-20 1-18 88-27 1-21 MEAN QNH PRESSURE IN HPA 1021.7 1020.0 1017.7 1017.4 1017.0 1014.2 1013.2 1014.7 1018.3 1022.4 1023.0 1022.4 1018.5 MAX. QNH PRESSURE IN HPA 1035.4 1036.9 1033.8 1031.1 1028.0 1026.4 1021.5 1025.4 1028.8 1034.3 1037.7 1037.7 1037.7 YEAR-DAY 92-10 89- 8 90-17 5- 6 3- 1 93-22 96- 3 92-31 89-22 90-15 87-30 90-28 87-30 MIN. QNH PRESSURE IN HPA 1001.8 998.5 999.4 1003.9 1005.6 1001.7 1004.3 1006.0 1008.7 1010.2 1001.4 999.4 998.5 YEAR-DAY 0-21 1-21 3-26 97- 9 4-16 99-25 98- 5 4- 3 96- 8 5-20 1-18 88-27 1-21 MEAN QFF PRESSURE IN HPA 1025.0 1022.3 1017.9 1014.2 1011.3 1006.5 1004.7 1005.8 1011.8 1018.8 1023.5 1026.3 1015.7 MAX. QFF PRESSURE IN HPA 1043.3 1039.8 1036.3 1033.4 1026.9 1022.1 1012.2 1014.2 1023.0 1033.3 1039.5 1040.6 1043.3 YEAR-DAY 2-27 5-16 3- 2 5- 6 3- 1 93-22 4- 7 2-31 3-23 5-23 1-20 3-12 2-27 MIN. QFF PRESSURE IN HPA 1002.8 999.1 997.3 1001.6 1000.5 995.1 995.1 995.8 1001.7 1004.2 1000.2 1005.1 995.1 YEAR-DAY 0-21 1-21 3-26 4-23 1-29 1-17 5- 6 4- 3 3- 6 5-20 4-23 2-21 5- 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 893.7 892.3 889.9 889.3 888.9 886.2 885.3 886.5 889.6 893.6 894.4 894.2 890.3 MAX. QFE PRESSURE IN HPA 906.0 906.8 904.0 901.2 898.9 897.1 893.7 896.0 899.5 905.0 907.0 907.0 907.0 YEAR-DAY 92-10 98-22 92-12 88- 8 3- 1 93-22 96- 3 92-31 89-22 90-15 87-30 90-28 87-30 MIN. QFE PRESSURE IN HPA 875.7 874.3 874.5 876.7 877.5 874.7 876.8 878.9 880.7 881.9 877.3 874.5 874.3 YEAR-DAY 0-21 1-21 87-19 97- 9 4-15 99-25 98- 5 4- 3 96- 8 5-20 4-23 88-27 1-21 MEAN QNH PRESSURE IN HPA 1020.6 1019.1 1016.4 1015.8 1015.3 1012.3 1011.3 1012.6 1016.1 1020.5 1021.5 1021.2 1016.9 MAX. QNH PRESSURE IN HPA 1034.3 1035.2 1032.1 1029.0 1026.4 1024.4 1020.6 1023.2 1027.1 1033.2 1035.4 1035.4 1035.4 YEAR-DAY 92-10 98-22 92-12 88- 8 3- 1 93-22 96- 3 92-31 89-22 90-15 87-30 90-28 87-30 MIN. QNH PRESSURE IN HPA 1000.6 999.0 999.2 1001.7 1002.6 999.5 1001.8 1004.1 1006.1 1007.5 1002.4 999.2 999.0 YEAR-DAY 0-21 1-21 87-19 97- 9 4-15 99-25 98- 5 4- 3 96- 8 5-20 4-23 88-27 1-21 MEAN QFF PRESSURE IN HPA 1023.3 1020.6 1015.8 1012.1 1009.2 1004.2 1002.3 1003.2 1009.0 1016.2 1021.5 1024.6 1013.5 MAX. QFF PRESSURE IN HPA 1042.2 1038.0 1034.9 1029.7 1024.3 1019.0 1009.6 1011.5 1020.5 1030.2 1038.4 1038.4 1042.2 YEAR-DAY 2-27 5-15 3- 2 5- 6 3- 1 93-22 2-29 1-11 94-23 5-23 1-20 3-12 2-27 MIN. QFF PRESSURE IN HPA 1001.8 999.6 1000.0 999.5 995.7 990.9 992.8 993.5 998.4 1001.4 1000.1 1002.6 990.9 YEAR-DAY 0-21 1-21 1-24 2-25 1-29 1-17 5- 5 4- 3 3- 6 5-20 4-23 94- 3 1-17 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 892.4 890.8 888.2 887.7 887.3 884.4 883.3 884.3 887.4 891.7 893.0 893.0 888.6 MAX. QFE PRESSURE IN HPA 904.5 905.7 902.4 900.0 897.5 895.3 892.0 894.6 897.6 903.2 905.5 906.1 906.1 YEAR-DAY 92-10 98-22 90-16 88- 8 92- 2 93-22 96- 3 92-30 89-22 90-15 87-30 3-11 3-11 MIN. QFE PRESSURE IN HPA 876.2 871.9 874.0 876.5 874.5 873.3 874.9 876.1 878.6 881.2 878.8 874.8 871.9 YEAR-DAY 3-28 99-20 88- 4 97- 9 4-15 99-24 98- 5 4- 3 96-21 5-20 1-17 94- 3 99-20 MEAN QNH PRESSURE IN HPA 1019.2 1017.4 1014.6 1013.9 1013.5 1010.3 1009.0 1010.1 1013.6 1018.5 1019.8 1019.8 1015.0 MAX. QNH PRESSURE IN HPA 1032.7 1034.0 1030.3 1027.6 1024.9 1022.4 1018.7 1021.6 1025.0 1031.2 1033.8 1034.4 1034.4 YEAR-DAY 92-10 98-22 90-16 88- 8 92- 2 93-22 96- 3 92-30 89-22 90-15 87-30 3-11 3-11 MIN. QNH PRESSURE IN HPA 1001.1 996.3 998.7 1001.5 999.2 997.9 999.7 1001.0 1003.8 1006.7 1004.0 999.6 996.3 YEAR-DAY 3-28 99-20 88- 4 97- 9 4-15 99-24 98- 5 4- 3 96-21 5-20 1-17 94- 3 99-20 MEAN QFF PRESSURE IN HPA 1021.6 1018.7 1013.5 1010.2 1007.6 1002.2 1000.0 1000.6 1006.5 1014.0 1019.8 1023.2 1011.5 MAX. QFF PRESSURE IN HPA 1039.7 1035.7 1032.6 1027.4 1022.5 1017.1 1008.1 1009.9 1018.2 1027.7 1036.6 1038.2 1039.7 YEAR-DAY 2-27 5-16 3- 2 5- 5 3- 1 93-22 2-29 1-11 94-23 5-23 1-20 3-11 2-27 MIN. QFF PRESSURE IN HPA 1003.8 999.1 999.1 999.2 994.7 988.5 989.9 989.9 995.8 1000.7 1002.2 998.9 988.5 YEAR-DAY 4-23 3-20 1-24 3-26 4-15 1-17 5- 5 4- 3 3- 6 3-27 1-17 94- 3 1-17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M CLIMATOLOGICAL NORMALS FOR THE PERIOD 1987-2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 892.8 891.0 888.4 887.7 887.3 884.1 883.0 884.0 887.3 892.0 893.4 893.5 888.7 MAX. QFE PRESSURE IN HPA 905.2 905.9 904.8 899.8 897.5 894.5 891.2 894.8 897.6 903.2 905.5 907.1 907.1 YEAR-DAY 92- 9 98-22 90-16 88- 8 92- 2 93-22 96- 3 92-11 89-22 90-15 87-30 3-11 3-11 MIN. QFE PRESSURE IN HPA 877.7 873.9 873.5 876.6 875.7 872.1 874.9 875.1 878.6 883.3 879.2 875.5 872.1 YEAR-DAY 3-28 99-20 88- 4 2- 3 4-15 99-24 98- 5 4- 3 96-21 3-27 1-17 94- 3 99-24 MEAN QNH PRESSURE IN HPA 1019.6 1017.6 1014.7 1013.9 1013.5 1010.0 1008.7 1009.8 1013.5 1018.7 1020.3 1020.4 1015.1 MAX. QNH PRESSURE IN HPA 1033.4 1034.2 1033.0 1027.4 1024.9 1021.5 1017.9 1021.9 1025.0 1031.2 1033.8 1035.6 1035.6 YEAR-DAY 92- 9 98-22 90-16 88- 8 92- 2 93-22 96- 3 92-11 89-22 90-15 87-30 3-11 3-11 MIN. QNH PRESSURE IN HPA 1002.8 998.6 998.1 1001.6 1000.6 996.6 999.7 999.9 1003.8 1009.0 1004.5 1000.4 996.6 YEAR-DAY 3-28 99-20 88- 4 2- 3 4-15 99-24 98- 5 4- 3 96-21 3-27 1-17 94- 3 99-24 MEAN QFF PRESSURE IN HPA 1024.8 1021.7 1015.5 1011.6 1008.9 1002.6 1000.0 1001.3 1007.3 1015.7 1021.0 1023.7 1012.8 MAX. QFF PRESSURE IN HPA 1046.6 1048.5 1039.2 1028.8 1025.9 1016.4 1011.1 1017.4 1021.9 1030.8 1039.5 1048.2 1048.5 YEAR-DAY 92-10 89- 5 90-16 5- 5 92- 2 93-22 91-11 92-11 89-22 90-15 87-30 90-28 89- 5 MIN. QFF PRESSURE IN HPA 1004.4 998.3 999.8 999.9 996.7 987.0 990.0 989.0 995.8 1003.3 1003.7 1000.9 987.0 YEAR-DAY 4-23 99-20 88- 4 3-20 0-26 99-24 5- 5 4- 3 95- 4 98- 1 1-17 94- 3 99-24 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 892.6 890.9 889.4 888.9 888.3 885.7 885.3 886.0 889.5 893.3 894.0 894.4 889.9 MAX. QFE PRESSURE IN HPA 903.5 903.1 903.2 901.6 897.5 895.8 892.4 892.8 898.5 900.9 903.3 907.8 907.8 YEAR-DAY 2-27 2- 5 4- 8 5- 5 3- 1 93-21 0-30 1-11 3-22 93-19 3-25 3-11 3-11 MIN. QFE PRESSURE IN HPA 879.3 876.5 879.6 878.1 877.3 875.7 877.4 877.1 882.8 882.5 879.3 877.3 875.7 YEAR-DAY 3-28 3-19 3-26 2- 3 4-15 1-17 5- 5 4- 3 0- 6 3-28 1-17 94- 3 1-17 MEAN QNH PRESSURE IN HPA 1019.4 1017.5 1015.9 1015.2 1014.6 1011.8 1011.3 1012.1 1016.0 1020.1 1020.9 1021.5 1016.4 MAX. QNH PRESSURE IN HPA 1031.6 1031.1 1031.2 1029.4 1024.9 1023.0 1019.2 1019.6 1026.0 1028.7 1031.3 1036.3 1036.3 YEAR-DAY 2-27 2- 5 4- 8 5- 5 3- 1 93-21 0-30 1-11 3-22 93-19 3-25 3-11 3-11 MIN. QNH PRESSURE IN HPA 1004.6 1001.5 1004.9 1003.3 1002.4 1000.6 1002.5 1002.1 1008.5 1008.2 1004.6 1002.4 1000.6 YEAR-DAY 3-28 3-19 3-26 2- 3 4-15 1-17 5- 5 4- 3 0- 6 3-28 1-17 94- 3 1-17 MEAN QFF PRESSURE IN HPA 1023.5 1020.8 1015.9 1012.4 1009.8 1004.5 1002.6 1003.4 1009.4 1016.6 1021.8 1025.1 1013.8 MAX. QFF PRESSURE IN HPA 1040.8 1037.9 1033.7 1031.4 1023.4 1018.7 1011.0 1012.5 1022.0 1028.7 1036.8 1041.6 1041.6 YEAR-DAY 2-27 5-15 4- 8 5- 5 3- 1 93-21 2-28 1-11 3-22 5-23 1-20 3-11 3-11 MIN. QFF PRESSURE IN HPA 1005.3 1003.7 1001.9 1001.5 997.8 991.2 992.4 991.6 999.4 1003.9 1003.3 1002.3 991.2 YEAR-DAY 4-23 3-19 2-26 3-20 4-12 1-17 5- 5 4- 3 3- 6 3-28 1-17 94- 3 1-17 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 892.6 891.1 889.7 889.3 888.7 886.6 886.2 887.0 890.2 893.6 894.1 894.4 890.3 MAX. QFE PRESSURE IN HPA 904.3 903.5 903.4 902.3 897.8 896.9 893.4 893.2 898.9 901.9 903.5 906.8 906.8 YEAR-DAY 2-26 2- 5 4- 8 5- 5 3- 1 93-21 0-30 1-11 3-22 93-19 0-16 3-11 3-11 MIN. QFE PRESSURE IN HPA 879.7 876.7 877.6 878.1 877.9 877.4 878.8 878.9 883.0 881.5 878.6 877.2 876.7 YEAR-DAY 4-23 3-19 1-24 2- 3 4-12 1-17 5- 5 4- 3 4- 5 3-28 1-17 2-20 3-19 MEAN QNH PRESSURE IN HPA 1019.4 1017.7 1016.2 1015.7 1015.1 1012.7 1012.2 1013.1 1016.7 1020.5 1021.1 1021.4 1016.8 MAX. QNH PRESSURE IN HPA 1032.4 1031.6 1031.4 1030.2 1025.2 1024.2 1020.3 1020.1 1026.4 1029.8 1031.6 1035.2 1035.2 YEAR-DAY 2-26 2- 5 4- 8 5- 5 3- 1 93-21 0-30 1-11 3-22 93-19 0-16 3-11 3-11 MIN. QNH PRESSURE IN HPA 1005.0 1001.7 1002.7 1003.3 1003.0 1002.5 1004.0 1004.1 1008.7 1007.0 1003.8 1002.3 1001.7 YEAR-DAY 4-23 3-19 1-24 2- 3 4-12 1-17 5- 5 4- 3 4- 5 3-28 1-17 2-20 3-19 MEAN QFF PRESSURE IN HPA 1022.9 1020.2 1015.6 1012.4 1009.8 1005.0 1003.1 1003.9 1009.4 1016.3 1021.4 1024.5 1013.7 MAX. QFF PRESSURE IN HPA 1040.4 1036.7 1033.7 1031.9 1023.1 1019.4 1011.0 1012.8 1022.4 1028.8 1035.4 1040.1 1040.4 YEAR-DAY 2-26 5-15 4- 8 5- 5 3- 1 93-21 2-28 2-30 3-22 5-22 1-19 3-11 2-26 MIN. QFF PRESSURE IN HPA 1005.0 1000.7 998.5 1002.2 996.4 992.5 993.9 993.7 999.5 1001.4 1001.0 1002.1 992.5 YEAR-DAY 4-23 4-22 1-24 3-20 4-12 1-17 5- 5 4- 3 0- 6 3-28 1-17 94- 3 1-17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 1 LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M AVERAGE OF DRY BULB TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 3.3 5.4 7.5 14.2 22.4 27.7 28.8 27.7 22.9 11.7 8.3 3.4 15.3 1988 -2.2 -2.4 7.7 13.4 19.7 25.2 27.7 26.1 23.2 16.6 8.4 2.3 13.8 1989 -9.5 -10.2 6.9 17.2 20.9 27.5 30.5 29.2 23.8 18.3 10.4 4.1 14.1 1990 -5.7 -0.8 6.9 12.3 19.5 27.2 29.2 27.3 25.3 16.0 11.0 1.9 14.2 1991 -3.0 0.6 6.5 15.0 18.6 25.5 29.4 28.6 23.9 16.8 9.2 -0.0 14.3 1992 -7.9 -1.7 4.0 12.7 15.0 23.2 28.5 25.5 22.3 16.7 8.9 2.4 12.5 1993 -4.1 0.6 5.9 14.1 17.0 22.5 26.2 25.6 22.5 14.0 2.6 -0.2 12.2 1994 1.1 1.0 7.7 14.2 17.6 22.3 25.3 25.6 20.4 14.8 7.7 0.7 13.2 1995 2.5 4.8 9.8 14.3 20.0 24.2 28.2 29.6 23.5 15.2 8.9 2.2 15.3 1996 0.6 3.9 6.2 12.6 20.6 24.9 29.1 29.1 24.9 15.9 7.6 5.9 15.1 1997 0.5 -2.7 4.4 14.9 19.9 26.1 28.4 29.9 22.4 18.8 7.6 3.7 14.5 1998 -6.3 -3.4 6.8 15.4 19.9 27.9 28.8 29.2 24.5 17.2 11.3 5.7 14.7 1999 2.6 6.4 9.1 15.3 21.9 27.7 28.0 30.9 23.8 18.4 7.5 3.6 16.3 2000 0.7 0.9 6.9 15.7 19.9 24.6 28.6 27.7 22.8 13.8 6.4 2.5 14.2 2001 0.4 3.7 10.6 16.1 19.1 25.3 26.5 27.7 23.3 15.8 5.6 4.5 14.9 2002 -1.1 3.5 9.3 12.2 17.1 23.9 26.7 26.7 24.5 18.5 8.0 -2.2 13.9 2003 0.8 2.5 5.6 12.2 16.9 22.5 26.5 27.4 22.2 18.6 7.6 1.3 13.7 2004 2.5 4.4 10.0 12.2 17.4 24.3 25.8 28.0 22.4 16.5 8.0 -0.6 14.2 2005 -2.8 -1.7 8.3 14.6 17.5 23.8 28.4 26.7 23.1 15.7 7.2 4.0 13.7 MEAN -1.4 0.8 7.4 14.1 19.0 25.1 27.9 27.8 23.3 16.3 8.0 2.4 14.2 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 2 LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M AVERAGE OF MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 -3.7 -0.6 1.4 4.8 12.0 16.7 18.8 17.9 13.5 6.4 1.0 -0.5 7.3 1988 -5.5 -5.8 0.8 6.1 9.9 14.5 18.5 18.2 13.6 9.0 1.6 -2.9 6.5 1989 -14.6 -15.6 1.4 7.1 10.0 16.2 20.3 20.1 14.0 10.1 4.4 -1.6 6.0 1990 -9.9 -4.9 -0.0 4.8 9.5 15.8 19.8 17.9 14.4 7.5 2.4 -4.0 6.1 1991 -7.0 -5.2 1.3 7.3 9.6 15.0 19.2 18.7 13.3 9.3 2.3 -3.0 6.8 1992 -12.7 -6.2 -2.2 5.3 8.3 13.5 18.8 15.9 12.3 6.7 2.2 -1.4 5.1 1993 -8.4 -4.4 -0.7 5.9 10.2 14.1 18.6 18.1 14.7 7.0 0.1 -1.9 6.1 1994 -2.2 -3.5 2.2 7.5 10.1 14.5 17.8 18.3 12.4 8.6 3.2 -2.9 7.2 1995 -1.1 -1.1 2.0 6.9 10.8 14.7 19.5 20.0 14.5 6.6 0.5 -3.9 7.5 1996 -3.2 -0.8 1.2 6.1 12.2 14.6 19.7 19.0 15.1 8.4 0.9 0.3 7.8 1997 -4.8 -8.5 -1.9 6.0 10.6 16.1 19.4 20.6 13.2 10.1 2.5 -0.9 6.8 1998 -10.3 -7.4 0.8 7.4 11.1 17.1 19.0 19.3 15.0 8.0 4.5 -0.2 7.0 1999 -2.6 -1.4 0.8 6.7 11.7 17.7 18.1 21.2 14.9 9.2 1.4 -0.5 8.1 2000 -3.4 -4.2 0.3 8.8 12.1 16.1 20.3 20.0 15.4 7.8 2.1 -0.4 7.9 2001 -3.5 -2.1 3.4 8.6 11.2 16.5 19.0 19.7 15.9 9.4 1.0 1.3 8.4 2002 -4.4 -1.6 2.4 7.2 10.2 14.8 19.0 18.7 15.7 11.4 2.9 -4.6 7.6 2003 -2.5 -1.1 1.1 6.2 9.6 14.5 19.3 19.7 14.8 11.1 2.7 -1.5 7.8 2004 -0.8 -0.8 3.1 5.4 10.8 15.9 18.7 20.2 14.4 9.2 4.5 -4.4 8.0 2005 -6.0 -5.3 2.2 7.5 11.0 15.8 20.9 19.5 15.5 8.6 2.3 -0.6 7.6 MEAN -5.6 -4.2 1.0 6.6 10.6 15.5 19.2 19.1 14.4 8.7 2.2 -1.8 7.1 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 3 LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M AVERAGE OF MAXIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 8.8 10.7 12.0 20.1 28.8 34.1 34.9 34.1 29.4 16.0 14.0 6.8 20.8 1988 0.6 1.2 12.9 18.6 25.4 31.5 33.5 31.9 29.9 22.5 14.2 7.0 19.1 1989 -4.9 -5.3 11.3 23.6 27.0 33.9 36.9 35.7 30.6 24.3 14.9 8.8 19.7 1990 -1.7 3.2 12.6 18.2 25.3 33.4 35.3 34.0 32.7 22.3 17.7 6.8 20.0 1991 0.4 5.1 10.6 20.7 23.8 31.4 35.7 35.1 30.8 22.3 14.2 2.5 19.4 1992 -4.0 2.3 8.8 18.5 19.5 29.1 35.1 31.7 28.9 24.0 14.3 6.0 17.9 1993 0.2 5.0 11.1 20.0 23.4 30.2 34.3 33.9 31.8 22.3 6.2 1.5 18.3 1994 4.9 6.6 14.1 21.5 25.0 30.5 33.7 34.0 28.8 21.9 13.4 5.7 20.0 1995 7.4 10.6 16.0 19.9 25.9 30.1 34.5 36.6 30.6 22.0 16.0 7.8 21.5 1996 4.3 8.5 10.8 17.7 26.5 31.1 35.2 36.0 31.7 21.9 13.5 11.0 20.7 1997 5.6 2.6 9.7 21.2 25.8 32.1 34.3 36.6 29.1 24.9 12.2 8.1 20.2 1998 -2.1 1.0 11.6 21.1 25.6 33.9 34.9 36.0 31.1 23.9 17.8 11.3 20.5 1999 6.9 12.5 14.9 21.4 28.5 33.9 33.7 37.6 30.4 25.0 12.8 7.2 22.1 2000 5.4 6.7 13.9 22.8 28.0 33.0 37.0 36.1 31.1 20.4 12.0 6.4 21.1 2001 5.7 10.7 19.2 23.9 27.5 33.8 34.3 36.4 31.7 23.8 11.0 8.7 22.2 2002 3.2 9.8 17.1 17.9 24.3 32.4 35.0 35.1 33.7 26.4 14.3 1.2 20.9 2003 5.3 7.5 11.1 18.9 24.5 30.5 34.6 35.6 30.2 26.7 13.3 5.0 20.3 2004 7.1 10.6 17.6 19.2 24.1 32.8 33.7 36.1 31.3 24.6 12.7 4.1 21.2 2005 1.4 2.8 14.9 22.5 24.7 31.9 36.5 35.0 31.3 23.5 13.1 10.2 20.6 MEAN 2.9 5.9 13.2 20.4 25.5 32.1 34.9 35.1 30.8 23.1 13.6 6.6 20.3 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 4 LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M DIFFERENCE BETWEEN AVERAGE MAXIMUM AND MINIMUM TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 12.5 11.3 10.6 15.3 16.8 17.4 16.1 16.2 15.9 9.6 13.0 7.3 13.5 1988 6.1 7.0 12.1 12.5 15.5 17.0 15.0 13.7 16.3 13.5 12.6 9.9 12.6 1989 9.7 10.3 9.9 16.5 17.0 17.7 16.6 15.6 16.6 14.2 10.5 10.4 13.7 1990 8.2 8.1 12.6 13.4 15.8 17.6 15.5 16.1 18.3 14.8 15.3 10.8 13.9 1991 7.4 10.3 9.3 13.4 14.2 16.4 16.5 16.4 17.5 13.0 11.9 5.5 12.6 1992 8.7 8.5 11.0 13.2 11.2 15.6 16.3 15.8 16.6 17.3 12.1 7.4 12.8 1993 8.6 9.4 11.8 14.1 13.2 16.1 15.7 15.8 17.1 15.3 6.1 3.4 12.2 1994 7.1 10.1 11.9 14.0 14.9 16.0 15.9 15.7 16.4 13.3 10.2 8.6 12.8 1995 8.5 11.7 14.0 13.0 15.1 15.4 15.0 16.6 16.1 15.4 15.5 11.7 14.0 1996 7.5 9.3 9.6 11.6 14.3 16.5 15.5 17.0 16.6 13.5 12.6 10.7 12.9 1997 10.4 11.1 11.6 15.2 15.2 16.0 14.9 16.0 15.9 14.8 9.7 9.0 13.4 1998 8.2 8.4 10.8 13.7 14.5 16.8 15.9 16.7 16.1 15.9 13.3 11.5 13.5 1999 9.5 13.9 14.1 14.7 16.8 16.2 15.6 16.4 15.5 15.8 11.4 7.7 14.0 2000 8.8 10.9 13.6 14.0 15.9 16.9 16.7 16.1 15.7 12.6 9.9 6.8 13.2 2001 9.2 12.8 15.8 15.3 16.3 17.3 15.3 16.7 15.8 14.4 10.0 7.4 13.8 2002 7.6 11.4 14.7 10.7 14.1 17.6 16.0 16.4 18.0 15.0 11.4 5.8 13.3 2003 7.8 8.6 10.0 12.7 14.9 16.0 15.3 15.9 15.4 15.6 10.6 6.5 12.5 2004 7.9 11.4 14.5 13.8 13.3 16.9 15.0 15.9 16.9 15.4 8.2 8.5 13.2 2005 7.4 8.1 12.7 15.0 13.7 16.1 15.6 15.5 15.8 14.9 10.8 10.8 13.0 MEAN 8.5 10.1 12.2 13.8 14.9 16.6 15.7 16.0 16.4 14.4 11.4 8.4 13.2 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 5 LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M AVERAGE OF MEAN DAILY TEMPERATURE IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 2.5 5.1 6.7 12.4 20.4 25.4 26.9 26.0 21.5 11.2 7.5 3.1 14.1 1988 -2.4 -2.3 6.8 12.3 17.7 23.0 26.0 25.0 21.8 15.8 7.9 2.1 12.8 1989 -9.8 -10.5 6.4 15.3 18.5 25.0 28.6 27.9 22.3 17.2 9.6 3.6 12.8 1990 -5.8 -0.8 6.3 11.5 17.4 24.6 27.6 26.0 23.6 14.9 10.0 1.4 13.0 1991 -3.3 -0.1 5.9 14.0 16.7 23.2 27.5 26.9 22.1 15.8 8.3 -0.2 13.1 1992 -8.4 -1.9 3.3 11.9 13.9 21.3 26.9 23.8 20.6 15.4 8.2 2.3 11.5 1993 -4.1 0.3 5.2 13.0 16.8 22.1 26.5 26.0 23.2 14.7 3.2 -0.2 12.2 1994 1.3 1.6 8.1 14.5 17.6 22.5 25.7 26.2 20.6 15.3 8.3 1.4 13.6 1995 3.1 4.7 9.0 13.4 18.4 22.4 27.0 28.3 22.6 14.3 8.2 2.0 14.5 1996 0.6 3.9 6.0 11.9 19.3 22.8 27.5 27.5 23.4 15.1 7.2 5.6 14.2 1997 0.4 -3.0 3.9 13.6 18.2 24.1 26.8 28.6 21.2 17.5 7.3 3.6 13.5 1998 -6.2 -3.2 6.2 14.2 18.3 25.5 26.9 27.7 23.1 15.9 11.2 5.5 13.8 1999 2.2 5.6 7.9 14.0 20.1 25.8 25.9 29.4 22.6 17.1 7.1 3.3 15.1 2000 1.0 1.2 7.1 15.8 20.0 24.5 28.7 28.1 23.2 14.1 7.0 3.0 14.5 2001 1.1 4.3 11.3 16.3 19.4 25.2 26.6 28.1 23.8 16.6 6.0 5.0 15.3 2002 -0.6 4.1 9.7 12.6 17.3 23.6 27.0 26.9 24.7 18.9 8.6 -1.7 14.3 2003 1.4 3.2 6.1 12.5 17.0 22.5 27.0 27.7 22.5 18.9 8.0 1.8 14.0 2004 3.1 4.9 10.3 12.3 17.5 24.4 26.2 28.1 22.9 16.9 8.6 -0.1 14.6 2005 -2.3 -1.2 8.5 15.0 17.9 23.8 28.7 27.2 23.4 16.1 7.7 4.8 14.1 MEAN -1.4 0.8 7.1 13.5 18.0 23.8 27.0 27.1 22.6 15.9 7.9 2.4 13.7 SD 3.93 4.04 2.06 1.41 1.50 1.31 0.87 1.35 1.10 1.77 1.64 2.06 1.92 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 6 LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M TEMPERATURE RECORDS LOWEST IN C. YEAR JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL 1987 -8.4 -6.5 -3.8 -3.0 7.0 11.5 13.0 12.0 6.7 1.4 -8.0 -9.3 -9.3 DAY 14 12 22 6 6 16 4 30 24 12 30 31 1988 -15.0 -12.8 -5.0 -2.6 4.8 10.8 11.0 13.4 9.8 4.4 -5.0 -17.0 -17.0 DAY 3 6 7 6 3 3 28 31 30 24 15 30 1989 -22.7 -25.6 -6.6 1.6 5.4 12.8 17.2 16.4 6.4 2.4 -6.0 -7.0 -25.6 DAY 16 7 1 3 1 12 16 18 20 24 22 6 1990 -18.6 -14.7 -8.0 -2.8 4.3 13.4 12.6 14.2 10.6 2.0 -3.0 -20.6 -20.6 DAY 13 1 18 3 4 18 1 30 29 16 19 29 1991 -16.0 -11.6 -13.6 4.0 5.0 9.4 14.2 15.0 6.8 5.7 -4.0 -9.6 -16.0 DAY 1 13 11 6 25 13 12 27 27 31 28 18 1992 -21.0 -13.5 -9.0 0.6 -0.4 10.0 12.4 10.0 6.0 2.2 -8.2 -11.0 -21.0 DAY 13 1 1 8 5 5 12 12 30 8 27 29 1993 -18.8 -13.7 -6.2 0.6 4.0 9.4 14.3 13.6 10.4 3.0 -11.0 -8.0 -18.8 DAY 22 16 23 23 9 22 23 29 30 7 15 1 1994 -8.8 -10.4 -3.0 1.4 5.0 9.8 12.2 15.8 7.2 3.2 -0.8 -11.6 -11.6 DAY 24 20 2 5 7 30 2 8 16 13 10 7 1995 -6.3 -8.5 -3.0 1.8 4.3 11.2 15.6 17.0 7.4 1.6 -7.0 -10.6 -10.6 DAY 23 26 1 8 9 23 6 20 22 18 28 21 1996 -7.6 -8.6 -5.2 0.4 8.0 10.0 13.2 15.0 10.0 1.0 -4.6 -4.0 -8.6 DAY 27 4 17 4 2 12 15 4 21 29 14 1 1997 -15.6 -20.0 -11.8 -3.2 3.8 11.8 15.7 16.0 7.8 5.0 -2.2 -7.6 -20.0 DAY 29 2 9 12 6 2 6 21 15 24 29 29 1998 -22.6 -14.4 -9.8 0.6 5.0 2.0 14.2 15.6 10.6 0.7 0.4 -5.2 -22.6 DAY 17 18 2 1 4 13 25 5 27 28 28 20 1999 -8.0 -6.0 -3.4 0.4 4.0 14.0 10.6 16.6 8.0 3.2 -6.6 -6.0 -8.0 DAY 3 22 19 10 21 3 15 20 28 26 29 7 2000 -11.4 -11.6 -7.0 3.6 6.8 7.0 16.0 16.0 11.4 1.8 -1.8 -4.0 -11.6 DAY 18 9 16 11 11 13 4 17 27 30 29 6 2001 -11.8 -7.4 -3.2 4.0 7.0 11.0 12.0 15.0 11.0 3.8 -16.6 -6.2 -16.6 DAY 28 1 12 13 19 12 19 13 20 30 20 22 2002 -13.0 -7.4 -4.6 3.0 5.8 9.8 15.0 14.4 12.6 4.6 -2.8 -13.8 -13.8 DAY 31 19 1 13 14 8 2 31 16 23 24 28 2003 -9.8 -6.2 -7.2 -0.4 2.4 8.4 14.8 16.4 8.6 3.8 -5.0 -7.4 -9.8 DAY 1 18 2 18 1 6 2 3 23 31 25 12 2004 -5.8 -7.0 -3.2 -4.2 7.6 11.6 13.4 16.4 9.4 4.2 -3.8 -10.8 -10.8 DAY 21 24 17 6 19 14 11 27 20 25 30 19 2005 -14.8 -15.8 -4.2 -2.2 6.0 10.6 17.4 14.2 12.2 0.6 -2.8 -6.4 -15.8 DAY 26 13 26 6 7 3 9 30 29 23 25 30 1987-2005 -22.7 -25.6 -13.6 -4.2 -0.4 2.0 10.6 10.0 6.0 0.6 -16.6 -20.6 -25.6 YEAR-DAY 89-16 89- 7 91-11 4- 6 92- 5 98-13 99-15 92-12 92-30 5-23 1-20 90-29 89 =============================================================================================== TEHRAN 2006,MAY M.(S & A) STATION MIANEH (40716) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) FORM 7 LATITUDE 37 27 N LONGITUDE 47 42 E DATA PROCESSING CENTER ELEVATION 1110.0 M