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