STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.0 0.3 2.0 13.3 18.1 22.8 25.1 24.1 21.7 13.3 9.6 1.4 12.6 MINIMUN AIR TEMPERATURE (C) -4.6 -3.2 -3.0 6.4 10.0 13.8 16.5 15.8 12.8 5.9 3.9 -1.4 6.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 1 0 1 0 0 0 3 DAYS WITH MINIMUM TEMP. <=-4 14 9 15 0 0 0 0 0 0 0 0 6 44 DAYS WITH FREEZING MIN.<= 0 26 19 17 0 0 0 0 0 0 1 1 21 85 TEMPERATURE RECORDS LOWEST(C) -15.0 -15.2 -14.8 1.6 5.0 10.5 12.0 11.8 7.0 -0.4 -1.0 -8.0 -15.2 DAY 5 23 6 5 4 19 1 20 22 31 1 4 MAXIMUM AIR TEMPERATURE (C) 2.3 2.9 5.8 17.5 25.1 30.3 32.3 31.3 29.4 20.0 15.2 5.5 18.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 14 23 21 16 0 0 0 75 DAYS WITH MAXIMUM TEMP. <= 0 11 8 11 0 0 0 0 0 0 0 0 1 31 TEMPERATURE RECORDS HIGHEST(C) 12.0 12.0 16.0 26.0 32.0 36.0 38.0 36.4 35.0 26.0 22.0 10.6 38.0 DAY 15 14 31 19 30 26 13 6 1 1 9 7 DIF. BETWEEN (MAX.-MIN.) (C) 6.9 6.1 8.8 11.1 15.1 16.5 15.8 15.5 16.6 14.1 11.3 6.9 12.0 MEAN DAILY TEMP. (MDT) (C) -1.1 -0.2 1.4 12.0 17.5 22.0 24.4 23.6 21.1 13.0 9.6 2.0 12.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 2.8 44.9 106.1 82.0 35.1 0.0 0.0 0.0 271.0 HEATING DEG. DAYS(BASE 18 0C) 593.4 508.9 515.2 180.6 34.2 0.1 0.0 0.0 6.7 157.0 252.2 495.7 2743.9 DEWPOINT (MEAN C) -4.1 -6.5 -7.0 2.3 5.8 4.1 7.6 6.2 1.4 0.9 3.2 -2.2 1.0 MIXING RATIO (G/KG) 3.44 3.01 3.00 5.37 6.90 6.26 8.05 7.23 5.15 4.88 5.67 3.86 5.23 VAPOUR PRESSURE (HPA) 4.75 4.12 4.14 7.37 9.46 8.56 10.97 9.91 7.09 6.74 7.85 5.34 7.19 SATURATION DEF. (HPA) 1.34 2.44 3.93 8.60 12.33 20.74 22.25 21.51 20.47 9.33 4.57 1.57 10.76 RELATIVE HUMIDITY (MEAN %) 81 63 54 50 49 34 36 35 30 47 67 78 52 RELATIVE HUMIDITY (MAX. %) 89 73 70 70 73 54 55 54 48 72 84 90 69 RELATIVE HUMIDITY (MIN. %) 72 53 42 37 27 17 22 21 17 30 48 61 37 RELATIVE HUMIDITY (MEAN% 03UTC) 85 66 65 68 72 52 51 52 47 65 82 86 66 RELATIVE HUMIDITY (MEAN% 09UTC) 78 63 48 44 34 23 32 26 23 36 53 70 44 RELATIVE HUMIDITY (MEAN% 15UTC) 83 59 49 43 33 20 23 23 20 39 64 77 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 63.0 137.0 57.0 20.0 2.0 1.0 0.0 0.5 0.0 17.0 51.0 50.2 398.7 DAYS WITH PRECIPITATION >=10 2 5 1 0 0 0 0 0 0 1 2 1 12 DAYS WITH PRECIPITATION >= 5 3 9 1 2 0 0 0 0 0 1 4 3 23 DAYS WITH PRECIPITATION >= 1 7 13 8 6 1 1 0 0 0 3 4 10 53 DAYS WITH PRECIPITATION 7 14 8 6 2 1 0 1 0 3 5 11 58 GREATEST DAILY PRECIPITATION 38.0 36.0 36.0 6.0 2.0 1.0 0.0 0.5 0.0 12.0 24.0 26.0 38.0 DAY 2 5 24 23 16 16 ** 2 ** 12 12 1 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 1 0 1 DAYS WITH SNOW OR SLEET 5 8 1 0 0 0 0 0 0 0 0 5 19 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 2 0 0 2 WIND DIRECTION (PREVAILING) 225 180 180 180 225 225 45 45 225 180 180 225 225 PREVAILING WIND SPEED(KNOTS) 12.5 13.7 9.7 11.0 10.4 10.6 8.7 7.9 10.7 9.9 8.7 8.9 10.9 PREVAILING WIND PERCENT 11.0 37.1 12.9 17.3 15.3 15.3 19.0 24.2 17.5 14.0 5.1 11.6 11.4 CALMS PERCENT OF WIND 75.5 40.0 72.9 62.7 69.8 52.1 56.5 53.3 58.0 58.5 83.2 78.9 63.5 NO. OF WIND OBSERVATION 155 140 155 150 235 236 232 240 212 207 197 242 2401 VECTOR WIND DIRECTION (MEAN) 198 193 195 199 219 225 25 21 213 202 206 203 202 VECTOR WIND MAGNITUDE(KNOTS) 2.4 7.4 1.0 3.3 1.9 1.3 1.1 2.3 1.8 2.3 0.4 1.6 1.6 WIND STEADINESES (MEAN %) 85.7 94.9 41.7 78.6 73.1 31.7 28.2 63.9 51.4 60.5 33.3 88.9 45.7 WIND SPEED (MEAN KNOTS) 2.8 7.8 2.4 4.2 2.6 4.1 3.9 3.6 3.5 3.8 1.2 1.8 3.5 FASTEST WIND DIRECTION 200 180 180 210 210 200 210 210 220 200 190 210 180 FASTEST WIND SPEED (KNOTS) 19 31 17 31 29 23 19 19 19 31 19 19 31 DAY 10 19 21 14 17 6 27 21 12 19 26 19 DAYS WITH SKY CLEAR (0-2)/8 2 10 11 14 21 30 31 31 30 23 16 9 228 DAYS WITH P.CLOUDY (3-6)/8 15 10 13 10 9 0 0 0 0 8 10 11 86 DAYS WITH CLOUDY (7-8)/8 14 8 7 6 1 0 0 0 0 0 4 11 51 DAYS WITH VISIBILITY =< 2 KM 6 6 1 0 0 0 1 1 0 1 0 0 16 DURATION OF SUNSHINE HOURS 79.2 127.6 138.5 219.5 305.5 357.0 335.2 334.3 280.3 233.2 179.2 117.3 2706.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 865.3 858.6 866.1 862.3 863.5 860.4 859.3 862.6 863.5 866.7 868.3 866.2 863.6 MAX. QFE PRESSURE IN HPA 872.9 868.4 878.5 871.6 871.2 866.6 864.6 867.9 872.4 873.4 873.0 877.4 878.5 DAY-HOUR 24- 9 12- 6 5- 9 17- 6 12- 6 10- 6 28-12 12- 6 22- 6 6- 6 14- 6 9- 6 MIN. QFE PRESSURE IN HPA 853.3 846.0 850.2 857.0 856.0 854.0 853.0 856.1 857.3 859.2 861.6 847.8 846.0 DAY-HOUR 2- 9 5-15 24- 3 14-15 3- 3 20-15 19- 9 7-15 6-15 10-12 26- 9 19- 0 MEAN QNH PRESSURE IN HPA 1021.9 1014.2 1022.7 1018.4 1019.8 1016.2 1015.0 1018.8 1019.8 1023.4 1025.2 1022.8 1019.8 MAX. QNH PRESSURE IN HPA 1030.5 1025.4 1036.9 1029.0 1028.6 1023.3 1021.0 1024.8 1030.0 1031.1 1030.6 1035.7 1036.9 DAY-HOUR 24- 9 12- 6 5- 9 17- 6 12- 6 10- 6 28-12 12- 6 22- 6 6- 6 14- 6 9- 6 MIN. QNH PRESSURE IN HPA 1008.1 999.7 1004.5 1012.3 1011.2 1008.9 1007.7 1011.3 1012.7 1014.9 1017.6 1001.8 999.7 DAY-HOUR 2- 9 5-15 24- 3 14-15 3- 3 20-15 19- 9 7-15 6-15 10-12 26- 9 19- 0 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.8 1006.4 1004.0 1008.3 1011.2 1019.6 1024.0 1025.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1022.4 1016.3 1011.4 1016.1 1025.2 1030.2 1030.6 1039.2 ****** DAY-HOUR **-** **-** **-** **-** 12- 9 10- 3 29- 6 12- 6 22- 3 31- 6 1- 3 9- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.2 998.1 994.9 1000.5 1002.5 1007.6 1012.7 1002.6 ****** DAY-HOUR **-** **-** **-** **-** 30-21 20-15 19-15 7-12 6-21 19-21 10-12 18-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 863.9 860.5 859.2 862.8 863.8 866.2 869.1 866.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 869.2 866.3 863.1 866.8 871.7 871.4 872.5 875.8 ****** DAY ** ** ** ** 12 10 29 14 22 6 14 9 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 860.0 856.3 854.9 858.3 859.3 860.9 864.0 847.8 ****** DAY ** ** ** ** 31 20 19 8 6 20 10 19 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1020.3 1016.4 1014.9 1019.0 1020.1 1022.9 1026.1 1023.1 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1026.3 1023.0 1019.3 1023.5 1029.2 1028.8 1030.1 1033.8 ****** DAY ** ** ** ** 12 10 29 14 22 6 14 9 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1015.8 1011.5 1009.9 1013.8 1015.0 1016.8 1020.3 1001.8 ****** DAY ** ** ** ** 31 20 19 8 6 20 10 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.0 1006.7 1003.8 1008.3 1011.1 1018.5 1023.9 1025.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1019.4 1016.0 1009.5 1013.8 1023.7 1027.2 1028.3 1035.3 ****** DAY ** ** ** ** 12 10 29 14 22 23 19 9 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.9 1000.6 996.6 1002.4 1003.9 1008.5 1013.9 1003.2 ****** DAY ** ** ** ** 31 20 20 8 7 20 10 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 864.8 858.3 865.4 862.5 863.5 861.1 860.0 863.4 864.1 867.1 868.3 865.8 863.7 MAX. QFE PRESSURE IN HPA 870.9 867.1 876.5 871.4 870.0 866.3 863.9 867.3 872.3 872.9 872.5 875.8 876.5 DAY 14 12 5 17 12 10 29 14 22 6 14 9 MIN. QFE PRESSURE IN HPA 854.3 849.4 850.2 858.3 856.0 856.3 854.8 858.6 859.3 860.6 861.7 848.0 848.0 DAY 2 5 24 3 3 20 19 8 7 10 26 19 MEAN QNH PRESSURE IN HPA 1021.3 1013.8 1021.9 1018.6 1019.8 1017.0 1015.8 1019.7 1020.4 1023.9 1025.3 1022.4 1020.0 MAX. QNH PRESSURE IN HPA 1028.2 1023.9 1034.6 1028.8 1027.2 1023.0 1020.2 1024.1 1029.8 1030.5 1030.1 1033.8 1034.6 DAY 14 12 5 17 12 10 29 14 22 6 14 9 MIN. QNH PRESSURE IN HPA 1009.2 1003.6 1004.5 1013.8 1011.2 1011.5 1009.8 1014.2 1015.0 1016.5 1017.7 1002.0 1002.0 DAY 2 5 24 3 3 20 19 8 7 10 26 19 MEAN QFF PRESSURE IN HPA 1026.6 1017.6 1025.6 1015.3 1013.5 1007.8 1005.0 1009.9 1012.2 1020.5 1024.1 1025.5 1017.0 MAX. QFF PRESSURE IN HPA 1037.7 1032.5 1046.3 1027.2 1021.2 1016.3 1011.4 1015.6 1025.2 1029.1 1030.6 1037.5 1046.3 DAY 6 23 5 17 12 10 29 13 22 31 1 9 MIN. QFF PRESSURE IN HPA 1015.2 1005.4 1003.2 1009.4 1004.7 1000.6 996.8 1003.7 1004.6 1010.9 1015.2 1003.6 996.8 DAY 2 5 24 15 3 20 19 7 2 10 10 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 865.8 858.9 866.7 863.3 864.3 861.5 860.7 864.0 864.7 867.9 869.2 866.5 864.5 MAX. QFE PRESSURE IN HPA 871.8 868.4 878.3 871.6 871.2 866.6 864.3 867.9 872.4 873.4 873.0 877.4 878.3 DAY 24 12 5 17 12 10 29 12 22 6 14 9 MIN. QFE PRESSURE IN HPA 854.0 849.7 853.1 859.1 857.0 856.3 854.0 858.8 860.0 860.4 863.0 849.7 849.7 DAY 2 26 24 2 3 20 19 8 6 10 26 19 MEAN QNH PRESSURE IN HPA 1022.4 1014.6 1023.5 1019.5 1020.6 1017.5 1016.6 1020.3 1021.2 1024.8 1026.2 1023.2 1020.9 MAX. QNH PRESSURE IN HPA 1029.3 1025.4 1036.7 1029.0 1028.6 1023.3 1020.7 1024.8 1030.0 1031.1 1030.6 1035.7 1036.7 DAY 24 12 5 17 12 10 29 12 22 6 14 9 MIN. QNH PRESSURE IN HPA 1008.9 1004.0 1007.9 1014.7 1012.3 1011.5 1008.9 1014.4 1015.8 1016.2 1019.2 1004.0 1004.0 DAY 2 26 24 2 3 20 19 8 6 10 26 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.9 1007.5 1005.5 1009.9 1012.7 1021.2 1026.3 1026.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1022.4 1015.5 1011.4 1016.1 1024.7 1030.2 1030.5 1039.2 ****** DAY ** ** ** ** 12 10 29 12 22 31 19 9 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1008.0 1000.3 995.9 1002.8 1005.5 1012.4 1016.8 1005.1 ****** DAY ** ** ** ** 31 20 19 7 7 20 10 19 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 866.0 859.2 867.1 862.9 863.8 860.7 859.9 863.1 863.8 866.9 868.3 866.1 864.0 MAX. QFE PRESSURE IN HPA 872.9 868.4 878.5 870.3 870.8 865.3 863.3 867.1 871.3 872.7 872.4 875.6 878.5 DAY 24 12 5 17 12 10 16 18 22 6 14 9 MIN. QFE PRESSURE IN HPA 853.3 849.0 854.8 859.3 857.1 855.8 853.0 858.1 858.4 859.3 861.6 850.0 849.0 DAY 2 5 24 2 3 20 19 8 6 10 26 19 MEAN QNH PRESSURE IN HPA 1022.7 1014.8 1023.9 1019.1 1020.1 1016.6 1015.7 1019.4 1020.1 1023.7 1025.3 1022.8 1020.3 MAX. QNH PRESSURE IN HPA 1030.5 1025.4 1036.9 1027.6 1028.1 1021.8 1019.5 1023.9 1028.7 1030.3 1030.0 1033.6 1036.9 DAY 24 12 5 17 12 10 16 18 22 6 14 9 MIN. QNH PRESSURE IN HPA 1008.1 1003.2 1009.8 1015.0 1012.4 1011.0 1007.7 1013.6 1013.9 1015.0 1017.6 1004.3 1003.2 DAY 2 5 24 2 3 20 19 8 6 10 26 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.2 1006.5 1004.5 1008.5 1011.0 1019.4 1024.3 1026.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1022.4 1014.0 1010.3 1013.8 1022.5 1029.3 1028.7 1036.5 ****** DAY ** ** ** ** 12 10 29 13 22 31 19 10 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1007.3 999.7 996.2 1001.6 1003.3 1011.0 1016.1 1004.8 ****** DAY ** ** ** ** 26 20 19 8 7 18 10 19 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 865.0 858.4 865.8 861.6 862.6 859.6 858.7 861.7 862.4 865.7 867.0 865.4 862.8 MAX. QFE PRESSURE IN HPA 871.8 867.5 876.7 868.9 869.2 864.3 864.6 866.5 869.3 871.2 871.3 875.3 876.7 DAY 24 23 5 17 12 9 28 18 22 6 14 9 MIN. QFE PRESSURE IN HPA 855.3 847.0 855.3 858.0 857.4 854.5 853.5 856.5 857.6 859.2 861.9 852.0 847.0 DAY 2 5 24 14 3 20 19 7 6 10 26 19 MEAN QNH PRESSURE IN HPA 1021.5 1013.9 1022.4 1017.6 1018.7 1015.3 1014.3 1017.8 1018.5 1022.3 1023.8 1022.0 1019.0 MAX. QNH PRESSURE IN HPA 1029.3 1024.3 1034.9 1025.9 1026.3 1020.7 1021.0 1023.2 1026.4 1028.6 1028.7 1033.3 1034.9 DAY 24 23 5 17 12 9 28 18 22 6 14 9 MIN. QNH PRESSURE IN HPA 1010.4 1000.9 1010.4 1013.5 1012.8 1009.5 1008.3 1011.8 1013.0 1014.9 1017.9 1006.6 1000.9 DAY 2 5 24 14 3 20 19 7 6 10 26 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.0 1005.6 1003.3 1007.0 1009.8 1017.6 1022.9 1025.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1020.2 1013.1 1010.6 1013.1 1019.6 1024.2 1026.8 1035.0 ****** DAY ** ** ** ** 12 9 28 18 22 22 18 9 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.9 998.7 995.3 1000.5 1003.3 1011.0 1012.7 1007.4 ****** DAY ** ** ** ** 26 20 19 7 6 19 10 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 865.2 858.4 865.4 861.4 862.3 859.1 858.1 861.0 862.4 865.9 867.3 866.0 862.7 MAX. QFE PRESSURE IN HPA 871.4 868.2 876.1 869.0 868.4 864.0 862.8 866.0 868.9 871.4 871.0 875.1 876.1 DAY 24 23 5 16 12 9 28 18 22 6 14 9 MIN. QFE PRESSURE IN HPA 855.8 846.0 852.6 857.0 856.5 854.0 853.1 856.1 857.3 860.3 862.8 850.4 846.0 DAY 2 5 23 14 1 20 19 7 6 10 26 18 MEAN QNH PRESSURE IN HPA 1021.7 1014.0 1022.0 1017.3 1018.4 1014.7 1013.6 1017.0 1018.6 1022.5 1024.1 1022.7 1018.9 MAX. QNH PRESSURE IN HPA 1028.8 1025.2 1034.2 1026.1 1025.4 1020.3 1019.0 1022.6 1025.9 1028.8 1028.4 1033.0 1034.2 DAY 24 23 5 16 12 9 28 18 22 6 14 9 MIN. QNH PRESSURE IN HPA 1011.0 999.7 1007.3 1012.3 1011.8 1008.9 1007.9 1011.3 1012.7 1016.1 1019.0 1004.8 999.7 DAY 2 5 23 14 1 20 19 7 6 10 26 18 MEAN QFF PRESSURE IN HPA 1026.9 1017.9 1025.4 1014.0 1012.0 1005.4 1002.9 1007.0 1010.5 1019.2 1023.0 1025.8 1015.8 MAX. QFF PRESSURE IN HPA 1038.8 1036.8 1044.4 1023.8 1019.9 1013.2 1009.4 1013.8 1020.2 1029.4 1028.6 1036.8 1044.4 DAY 6 23 5 16 12 9 28 18 22 31 18 9 MIN. QFF PRESSURE IN HPA 1014.9 1001.3 1005.9 1007.5 1005.2 998.1 994.9 1000.9 1003.9 1011.5 1016.2 1005.7 994.9 DAY 15 5 23 14 1 20 19 8 6 10 10 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 863.8 860.0 858.7 862.2 863.5 866.6 868.9 866.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 869.1 865.1 862.5 866.5 869.8 872.4 872.0 875.8 ****** DAY ** ** ** ** 12 9 28 13 22 31 18 8 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 859.8 855.1 853.5 857.3 858.4 859.7 864.8 848.6 ****** DAY ** ** ** ** 20 20 19 7 6 19 9 18 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1020.1 1015.8 1014.3 1018.3 1019.8 1023.4 1026.0 1023.4 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1026.2 1021.6 1018.6 1023.2 1027.0 1030.0 1029.5 1033.8 ****** DAY ** ** ** ** 12 9 28 13 22 31 18 8 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1015.5 1010.2 1008.3 1012.7 1013.9 1015.4 1021.3 1002.7 ****** DAY ** ** ** ** 20 20 19 7 6 19 9 18 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.6 1005.8 1003.1 1007.9 1011.2 1020.0 1024.8 1026.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1020.0 1013.2 1009.1 1014.2 1020.9 1030.1 1029.6 1036.9 ****** DAY ** ** ** ** 12 9 28 12 21 31 18 9 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.6 998.9 995.3 1000.8 1003.4 1008.0 1017.4 1003.4 ****** DAY ** ** ** ** 30 20 19 7 6 19 9 18 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 864.1 860.5 859.3 862.7 863.7 867.0 869.0 866.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 869.1 866.3 863.5 866.8 870.2 872.3 872.4 876.1 ****** DAY ** ** ** ** 12 9 28 13 22 31 13 8 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 859.9 856.3 854.6 858.3 858.6 861.3 864.6 848.1 ****** DAY ** ** ** ** 30 20 19 7 6 19 9 18 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1020.5 1016.3 1015.0 1018.9 1020.0 1023.8 1026.0 1023.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1026.2 1023.0 1019.8 1023.5 1027.4 1029.8 1030.0 1034.2 ****** DAY ** ** ** ** 12 9 28 13 22 31 13 8 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1015.6 1011.5 1009.6 1013.8 1014.2 1017.3 1021.0 1002.1 ****** DAY ** ** ** ** 30 20 19 7 6 19 9 18 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.8 1006.1 1003.7 1008.1 1010.8 1019.6 1023.7 1026.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1019.7 1014.9 1010.5 1013.6 1021.5 1029.7 1029.0 1036.1 ****** DAY ** ** ** ** 12 9 28 13 21 31 18 8 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.2 1000.1 997.5 1001.7 1002.5 1007.6 1015.8 1002.6 ****** DAY ** ** ** ** 30 19 18 7 6 19 9 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.7 3.2 4.9 12.0 15.3 20.4 26.5 25.0 22.1 15.7 5.3 -0.1 12.7 MINIMUN AIR TEMPERATURE (C) -3.0 -0.5 0.6 7.0 8.4 12.0 17.0 15.7 12.4 9.3 1.8 -3.8 6.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 1 0 0 0 0 3 DAYS WITH MINIMUM TEMP. <=-4 12 2 2 0 0 0 0 0 0 0 0 16 32 DAYS WITH FREEZING MIN.<= 0 20 18 14 0 0 0 0 0 0 0 13 23 88 TEMPERATURE RECORDS LOWEST(C) -15.6 -6.0 -5.0 2.2 4.6 8.8 11.2 12.0 8.0 4.0 -3.0 -11.6 -15.6 DAY 24 2 17 1 16 23 1 26 30 28 15 5 MAXIMUM AIR TEMPERATURE (C) 5.4 7.8 9.8 16.9 21.3 27.4 34.4 33.2 31.0 21.5 9.7 4.3 18.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 6 30 28 25 0 0 0 89 DAYS WITH MAXIMUM TEMP. <= 0 9 1 0 0 0 0 0 0 0 0 0 3 13 TEMPERATURE RECORDS HIGHEST(C) 12.6 14.6 18.2 22.6 26.6 33.0 41.0 39.0 33.8 28.0 20.0 11.2 41.0 DAY 3 28 30 24 28 28 9 1 3 3 1 26 DIF. BETWEEN (MAX.-MIN.) (C) 8.4 8.3 9.2 9.9 12.9 15.4 17.4 17.5 18.6 12.2 7.9 8.1 12.2 MEAN DAILY TEMP. (MDT) (C) 1.2 3.7 5.2 11.9 14.8 19.7 25.7 24.4 21.7 15.4 5.8 0.3 12.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 14.3 146.7 107.1 28.8 0.0 0.0 0.0 296.9 HEATING DEG. DAYS(BASE 18 0C) 520.0 400.8 397.3 177.5 101.1 4.6 0.0 0.0 1.3 84.6 366.9 549.8 2603.9 DEWPOINT (MEAN C) -4.7 -2.8 -2.3 4.7 4.9 7.0 9.0 6.5 1.8 6.0 0.7 -4.4 2.2 MIXING RATIO (G/KG) 3.22 3.65 3.92 6.34 6.42 7.47 8.61 7.20 5.26 6.89 4.76 3.28 5.59 VAPOUR PRESSURE (HPA) 4.46 5.03 5.41 8.72 8.82 10.27 11.91 10.00 7.30 9.52 6.58 4.54 7.71 SATURATION DEF. (HPA) 2.84 2.94 3.63 5.73 9.31 14.94 24.52 23.45 20.90 8.97 2.73 1.78 10.15 RELATIVE HUMIDITY (MEAN %) 64 67 63 65 53 47 37 34 30 56 74 74 55 RELATIVE HUMIDITY (MAX. %) 80 82 80 83 78 69 59 55 52 80 90 88 75 RELATIVE HUMIDITY (MIN. %) 51 48 44 44 34 28 20 19 15 35 54 56 37 RELATIVE HUMIDITY (MEAN% 03UTC) 73 78 78 80 72 66 56 53 47 76 85 79 70 RELATIVE HUMIDITY (MEAN% 09UTC) 58 57 56 52 40 33 28 25 19 44 60 67 45 RELATIVE HUMIDITY (MEAN% 15UTC) 64 62 50 53 42 34 24 22 21 52 72 71 47 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 10.3 33.5 58.7 53.4 68.0 3.0 0.1 0.0 0.0 38.7 82.4 25.2 373.3 DAYS WITH PRECIPITATION >=10 0 0 2 2 2 0 0 0 0 2 4 1 13 DAYS WITH PRECIPITATION >= 5 0 3 6 4 5 0 0 0 0 2 6 1 27 DAYS WITH PRECIPITATION >= 1 6 6 8 9 7 1 0 0 0 4 10 5 56 DAYS WITH PRECIPITATION 8 10 9 10 7 2 1 0 0 7 12 7 73 GREATEST DAILY PRECIPITATION 2.0 9.0 16.0 13.0 23.0 3.0 0.1 0.0 0.0 19.0 20.0 16.0 23.0 DAY 22 10 31 16 3 17 25 ** ** 10 10 27 DAY WITH THUNDER STORM 0 0 0 0 0 0 1 0 0 4 0 0 5 DAYS WITH SNOW OR SLEET 4 8 4 0 0 0 0 0 0 0 5 6 27 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 225 360 225 360 45 45 45 225 225 225 360 225 PREVAILING WIND SPEED(KNOTS) 9.7 8.5 8.1 11.2 10.2 7.3 5.2 5.0 8.2 9.5 9.0 10.3 9.6 PREVAILING WIND PERCENT 22.4 14.6 9.2 6.8 9.9 5.4 10.1 14.6 7.1 14.1 11.7 14.1 8.0 CALMS PERCENT OF WIND 53.4 73.5 71.4 76.8 67.2 81.5 74.8 73.3 74.9 64.1 72.8 65.3 70.7 NO. OF WIND OBSERVATION 219 219 206 190 232 205 238 240 239 198 239 248 2673 VECTOR WIND DIRECTION (MEAN) 199 209 333 221 40 229 34 24 229 204 203 19 208 VECTOR WIND MAGNITUDE(KNOTS) 4.6 2.0 0.5 0.5 0.8 0.3 0.5 0.7 0.6 1.8 1.8 2.0 0.6 WIND STEADINESES (MEAN %) 92.0 87.0 21.7 26.3 25.8 21.4 33.3 43.8 30.0 64.3 81.8 64.5 25.0 WIND SPEED (MEAN KNOTS) 5.0 2.3 2.3 1.9 3.1 1.4 1.5 1.6 2.0 2.8 2.2 3.1 2.4 FASTEST WIND DIRECTION 210 250 250 210 10 270 40 360 190 180 230 20 210 FASTEST WIND SPEED (KNOTS) 29 23 29 29 23 12 12 16 23 23 16 29 29 DAY 14 6 1 3 5 7 1 5 28 23 2 21 DAYS WITH SKY CLEAR (0-2)/8 14 10 7 6 19 26 27 30 29 12 7 14 201 DAYS WITH P.CLOUDY (3-6)/8 10 10 14 13 11 4 4 1 1 17 12 12 109 DAYS WITH CLOUDY (7-8)/8 7 8 10 11 1 0 0 0 0 2 11 5 55 DAYS WITH VISIBILITY =< 2 KM 2 0 1 0 0 0 0 0 0 0 0 0 3 DURATION OF SUNSHINE HOURS 155.2 ****** ****** ****** ****** ****** ****** 340.7 274.1 221.3 100.5 144.7 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 865.6 863.3 864.2 864.1 863.4 865.5 872.6 874.8 871.0 868.8 866.8 867.6 867.3 MAX. QFE PRESSURE IN HPA 874.4 871.6 872.2 870.7 872.1 874.0 878.0 883.0 886.0 875.2 874.8 878.6 886.0 DAY-HOUR 24- 6 22- 6 27- 9 5- 6 19- 6 3- 6 12- 6 30- 6 3-15 16- 6 15- 6 7- 6 MIN. QFE PRESSURE IN HPA 851.0 850.3 857.7 858.3 853.6 860.0 865.9 867.0 861.5 859.8 855.3 853.0 850.3 DAY-HOUR 19-12 6- 3 24-15 10-15 3-12 21-12 24-15 6-15 14-15 1-12 8-15 27-12 MEAN QNH PRESSURE IN HPA 1022.1 1019.5 1020.5 1020.5 1019.6 1022.0 1030.2 1032.7 1028.3 1025.8 1023.5 1024.4 1024.1 MAX. QNH PRESSURE IN HPA 1032.2 1029.0 1029.7 1028.0 1029.6 1031.8 1036.4 1042.1 1045.5 1033.2 1032.7 1037.0 1045.5 DAY-HOUR 24- 6 22- 6 27- 9 5- 6 19- 6 3- 6 12- 6 30- 6 3-15 16- 6 15- 6 7- 6 MIN. QNH PRESSURE IN HPA 1005.5 1004.7 1013.1 1013.8 1008.4 1015.8 1022.5 1023.8 1017.5 1015.5 1010.4 1007.7 1004.7 DAY-HOUR 19-12 6- 3 24-15 10-15 3-12 21-12 24-15 6-15 14-15 1-12 8-15 27-12 MEAN QFF PRESSURE IN HPA 1023.6 1021.2 1021.6 1017.4 1014.4 1014.4 1018.6 1022.2 1019.2 1019.6 1023.9 1028.3 1020.4 MAX. QFF PRESSURE IN HPA 1042.7 1031.2 1033.6 1026.1 1024.8 1023.8 1024.6 1032.8 1038.1 1029.2 1035.2 1043.6 1043.6 DAY-HOUR 24- 3 22- 6 2-21 5- 3 19- 6 3- 6 12- 6 31- 6 3-15 16- 3 15- 6 7- 6 MIN. QFF PRESSURE IN HPA 1007.1 1005.9 1011.5 1010.8 1004.4 1006.9 1011.4 1012.4 1008.5 1008.3 1009.3 1008.1 1004.4 DAY-HOUR 19-12 6- 0 31- 3 10-15 2-15 27-15 24-12 14-21 14-21 1-12 8-15 27-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 864.7 863.3 864.1 ****** 864.2 866.3 872.9 875.0 871.5 867.4 866.8 867.5 ****** MAX. QFE PRESSURE IN HPA 872.3 870.2 870.5 ****** 870.0 873.1 877.0 882.7 885.0 873.4 874.0 878.2 ****** DAY 5 22 3 ** 19 3 13 30 8 15 16 7 MIN. QFE PRESSURE IN HPA 855.4 851.7 860.6 ****** 858.0 862.0 866.9 868.3 862.7 861.0 857.3 858.5 ****** DAY 20 6 10 ** 10 19 24 15 15 2 9 27 MEAN QNH PRESSURE IN HPA 1021.2 1019.5 1020.5 ****** 1020.6 1023.0 1030.5 1032.9 1028.9 1024.2 1023.6 1024.3 ****** MAX. QNH PRESSURE IN HPA 1029.8 1027.4 1027.8 ****** 1027.2 1030.8 1035.2 1041.7 1044.4 1031.1 1031.8 1036.6 ****** DAY 5 22 3 ** 19 3 13 30 8 15 16 7 MIN. QNH PRESSURE IN HPA 1010.5 1006.3 1016.5 ****** 1013.5 1018.1 1023.7 1025.3 1018.9 1016.9 1012.7 1014.0 ****** DAY 20 6 10 ** 10 19 24 15 15 2 9 27 MEAN QFF PRESSURE IN HPA 1022.4 1020.7 1021.3 ****** 1014.6 1015.2 1018.7 1022.2 1019.6 1017.6 1023.6 1027.8 ****** MAX. QFF PRESSURE IN HPA 1032.2 1028.2 1032.9 ****** 1022.5 1023.5 1022.4 1032.0 1035.0 1024.8 1033.3 1041.7 ****** DAY 21 19 3 ** 19 3 27 30 8 15 21 7 MIN. QFF PRESSURE IN HPA 1012.1 1005.9 1014.0 ****** 1008.1 1009.5 1011.9 1013.0 1009.5 1011.0 1010.9 1012.4 ****** DAY 12 6 1 ** 10 12 24 15 15 2 9 27 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.2 863.2 864.1 864.1 863.3 865.8 873.5 875.4 871.8 869.1 866.9 867.5 867.6 MAX. QFE PRESSURE IN HPA 873.8 870.5 871.0 870.3 871.0 873.1 877.4 882.0 885.6 874.5 874.0 877.8 885.6 DAY 24 22 28 5 19 3 13 31 8 16 16 7 MIN. QFE PRESSURE IN HPA 855.4 850.3 858.0 859.6 855.0 862.0 866.9 869.0 863.0 862.4 858.0 857.0 850.3 DAY 20 6 25 10 3 21 24 15 15 2 9 27 MEAN QNH PRESSURE IN HPA 1022.8 1019.4 1020.5 1020.4 1019.5 1022.4 1031.2 1033.3 1029.3 1026.2 1023.6 1024.3 1024.4 MAX. QNH PRESSURE IN HPA 1031.6 1027.8 1028.4 1027.6 1028.4 1030.8 1035.7 1040.9 1045.1 1032.4 1031.8 1036.1 1045.1 DAY 24 22 28 5 19 3 13 31 8 16 16 7 MIN. QNH PRESSURE IN HPA 1010.5 1004.7 1013.5 1015.3 1010.0 1018.1 1023.7 1026.1 1019.2 1018.5 1013.5 1012.3 1004.7 DAY 20 6 25 10 3 21 24 15 15 2 9 27 MEAN QFF PRESSURE IN HPA 1026.9 1021.5 1021.4 1017.4 1014.7 1014.7 1020.1 1023.3 1021.2 1021.7 1024.6 1028.9 1021.4 MAX. QFF PRESSURE IN HPA 1042.7 1029.4 1033.4 1026.1 1024.7 1022.9 1024.5 1032.7 1036.9 1029.2 1034.5 1042.1 1042.7 DAY 24 22 3 5 18 3 22 31 8 16 16 7 MIN. QFF PRESSURE IN HPA 1011.7 1006.1 1011.5 1012.7 1005.8 1008.2 1012.3 1015.4 1011.2 1012.4 1011.7 1011.8 1005.8 DAY 12 6 31 11 3 27 24 15 15 1 9 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 867.0 864.2 865.1 864.7 863.8 866.1 873.8 875.9 872.1 870.1 867.7 868.2 868.2 MAX. QFE PRESSURE IN HPA 874.4 871.6 872.1 870.7 872.1 874.0 878.0 883.0 886.0 875.2 874.8 878.6 886.0 DAY 24 22 27 5 19 3 12 30 8 16 15 7 MIN. QFE PRESSURE IN HPA 856.9 853.5 859.2 859.7 855.2 862.0 867.9 869.8 863.4 863.3 859.0 855.0 853.5 DAY 19 6 31 10 3 21 24 15 15 1 8 27 MEAN QNH PRESSURE IN HPA 1023.8 1020.6 1021.6 1021.2 1020.1 1022.7 1031.6 1034.0 1029.6 1027.4 1024.6 1025.1 1025.2 MAX. QNH PRESSURE IN HPA 1032.2 1029.0 1029.6 1028.0 1029.6 1031.8 1036.4 1042.1 1045.5 1033.2 1032.7 1037.0 1045.5 DAY 24 22 27 5 19 3 12 30 8 16 15 7 MIN. QNH PRESSURE IN HPA 1012.2 1008.3 1014.9 1015.4 1010.3 1018.1 1024.8 1027.0 1019.7 1019.5 1014.6 1010.0 1008.3 DAY 19 6 31 10 3 21 24 15 15 1 8 27 MEAN QFF PRESSURE IN HPA 1023.9 1022.8 1023.6 ****** 1015.6 1015.4 1020.1 1023.6 1020.4 1020.3 1025.3 1029.3 ****** MAX. QFF PRESSURE IN HPA 1033.6 1031.2 1032.5 ****** 1024.8 1023.8 1024.6 1032.8 1036.3 1028.0 1035.2 1043.6 ****** DAY 5 22 3 ** 19 3 12 31 8 15 15 7 MIN. QFF PRESSURE IN HPA 1012.2 1008.9 1015.6 ****** 1010.4 1008.5 1011.7 1015.7 1010.7 1013.6 1012.7 1009.5 ****** DAY 12 6 1 ** 10 12 24 15 15 1 9 27 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 866.2 863.9 864.8 864.5 863.3 865.6 873.1 875.3 871.2 869.4 867.0 867.7 867.7 MAX. QFE PRESSURE IN HPA 874.0 870.9 872.2 869.9 871.3 873.0 877.0 882.7 885.3 874.8 874.2 877.0 885.3 DAY 24 22 27 5 19 2 12 30 7 15 15 7 MIN. QFE PRESSURE IN HPA 853.9 855.0 858.6 859.8 855.4 861.2 867.7 869.0 863.0 861.4 857.3 853.8 853.8 DAY 19 6 25 10 3 21 24 14 15 1 8 27 MEAN QNH PRESSURE IN HPA 1022.9 1020.2 1021.3 1021.0 1019.5 1022.1 1030.8 1033.3 1028.5 1026.6 1023.7 1024.6 1024.5 MAX. QNH PRESSURE IN HPA 1031.8 1028.2 1029.7 1027.1 1028.7 1030.6 1035.2 1041.7 1044.7 1032.7 1032.0 1035.2 1044.7 DAY 24 22 27 5 19 2 12 30 7 15 15 7 MIN. QNH PRESSURE IN HPA 1008.8 1010.0 1014.2 1015.5 1010.5 1017.1 1024.6 1026.1 1019.2 1017.4 1012.7 1008.7 1008.7 DAY 19 6 25 10 3 21 24 14 15 1 8 27 MEAN QFF PRESSURE IN HPA 1021.8 1021.6 1022.6 ****** 1014.4 1014.9 1019.0 1022.3 1018.9 1018.6 1023.8 1028.0 ****** MAX. QFF PRESSURE IN HPA 1030.2 1029.0 1030.6 ****** 1023.4 1023.1 1022.8 1031.8 1035.4 1027.1 1033.0 1040.3 ****** DAY 5 19 3 ** 19 2 12 30 7 15 15 7 MIN. QFF PRESSURE IN HPA 1008.9 1009.9 1015.9 ****** 1008.4 1007.2 1012.8 1013.6 1009.5 1009.8 1010.9 1008.5 ****** DAY 19 6 1 ** 22 12 24 14 15 1 8 27 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 865.1 862.4 863.4 863.6 862.2 864.4 871.6 873.8 870.0 868.6 866.1 866.8 866.5 MAX. QFE PRESSURE IN HPA 873.1 868.8 871.1 868.5 868.6 872.0 876.0 881.2 884.0 874.5 874.6 875.0 884.0 DAY 23 22 27 4 19 2 12 30 3 15 15 7 MIN. QFE PRESSURE IN HPA 851.0 854.6 858.0 858.6 853.6 860.0 866.2 867.5 861.8 859.8 856.3 853.0 851.0 DAY 19 6 31 10 3 21 24 14 15 1 8 27 MEAN QNH PRESSURE IN HPA 1021.6 1018.6 1019.7 1019.9 1018.3 1020.8 1029.0 1031.6 1027.2 1025.6 1022.8 1023.5 1023.2 MAX. QNH PRESSURE IN HPA 1030.8 1025.8 1028.5 1025.5 1025.6 1029.5 1034.1 1040.0 1043.2 1032.4 1032.5 1032.9 1043.2 DAY 23 22 27 4 19 2 12 30 3 15 15 7 MIN. QNH PRESSURE IN HPA 1005.5 1009.6 1013.5 1014.2 1008.4 1015.8 1022.9 1024.3 1017.8 1015.5 1011.5 1007.7 1005.5 DAY 19 6 31 10 3 21 24 14 15 1 8 27 MEAN QFF PRESSURE IN HPA 1020.7 1019.6 1020.7 ****** 1013.3 1014.2 1017.2 1021.0 1017.9 1017.9 1022.9 1027.0 ****** MAX. QFF PRESSURE IN HPA 1027.6 1026.7 1029.6 ****** 1020.4 1022.5 1021.3 1030.3 1034.0 1026.7 1033.6 1038.4 ****** DAY 5 19 2 ** 19 2 8 30 3 15 15 6 MIN. QFF PRESSURE IN HPA 1007.1 1009.5 1012.6 ****** 1007.2 1007.2 1011.4 1012.6 1008.8 1008.3 1009.6 1008.1 ****** DAY 19 6 1 ** 22 12 24 14 15 1 7 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 865.7 862.7 863.2 863.5 862.2 864.0 871.1 873.4 869.8 868.4 866.1 867.2 866.4 MAX. QFE PRESSURE IN HPA 874.3 868.5 869.8 868.8 868.0 871.2 875.0 880.7 886.0 873.9 874.0 876.2 886.0 DAY 23 22 27 4 18 2 12 30 3 15 15 6 MIN. QFE PRESSURE IN HPA 851.3 857.0 857.7 858.3 854.0 860.2 865.9 867.0 861.5 860.0 855.3 855.0 851.3 DAY 19 15 24 10 3 12 24 6 14 1 8 27 MEAN QNH PRESSURE IN HPA 1022.3 1018.8 1019.5 1019.8 1018.3 1020.4 1028.4 1031.1 1027.0 1025.3 1022.8 1024.1 1023.1 MAX. QNH PRESSURE IN HPA 1032.1 1025.5 1027.0 1025.8 1024.9 1028.6 1032.9 1039.5 1045.5 1031.7 1031.8 1034.3 1045.5 DAY 23 22 27 4 18 2 12 30 3 15 15 6 MIN. QNH PRESSURE IN HPA 1005.8 1012.3 1013.1 1013.8 1008.9 1016.0 1022.5 1023.8 1017.5 1015.8 1010.4 1010.0 1005.8 DAY 19 15 24 10 3 12 24 6 14 1 8 27 MEAN QFF PRESSURE IN HPA 1026.3 1020.8 1020.3 1016.7 1013.3 1012.6 1017.4 1021.2 1018.9 1020.8 1023.7 1028.6 1020.0 MAX. QFF PRESSURE IN HPA 1040.9 1027.2 1030.7 1024.9 1020.9 1021.3 1021.0 1031.1 1038.1 1027.6 1034.8 1041.0 1041.0 DAY 23 19 2 4 17 2 12 30 3 15 15 6 MIN. QFF PRESSURE IN HPA 1007.6 1013.6 1012.3 1010.8 1004.4 1006.9 1011.6 1013.4 1009.6 1009.8 1009.3 1010.5 1004.4 DAY 19 6 24 10 2 27 24 14 14 1 8 27 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 864.2 863.2 864.4 ****** 864.3 866.3 872.2 874.6 870.7 ****** 866.8 867.9 ****** MAX. QFE PRESSURE IN HPA 871.5 870.0 871.0 ****** 870.2 872.8 876.2 882.0 885.0 ****** 874.0 878.0 ****** DAY 4 21 2 ** 19 2 12 29 3 ** 15 6 MIN. QFE PRESSURE IN HPA 851.1 854.3 860.8 ****** 860.0 861.7 867.0 867.8 862.0 ****** 856.5 857.2 ****** DAY 19 5 9 ** 12 12 19 14 14 ** 8 27 MEAN QNH PRESSURE IN HPA 1020.6 1019.4 1020.8 ****** 1020.7 1022.9 1029.8 1032.5 1028.0 ****** 1023.5 1024.8 ****** MAX. QNH PRESSURE IN HPA 1028.9 1027.2 1028.4 ****** 1027.4 1030.4 1034.3 1040.9 1044.4 ****** 1031.8 1036.4 ****** DAY 4 21 2 ** 19 2 12 29 3 ** 15 6 MIN. QNH PRESSURE IN HPA 1005.6 1009.2 1016.7 ****** 1015.8 1017.7 1023.8 1024.7 1018.1 ****** 1011.8 1012.6 ****** DAY 19 5 9 ** 12 12 19 14 14 ** 8 27 MEAN QFF PRESSURE IN HPA 1022.7 1021.6 1022.4 ****** 1015.0 1014.8 1018.3 1022.0 1018.3 ****** 1024.2 1029.0 ****** MAX. QFF PRESSURE IN HPA 1030.8 1029.3 1033.1 ****** 1022.6 1023.3 1022.2 1031.3 1035.7 ****** 1034.0 1042.9 ****** DAY 4 19 2 ** 19 2 2 24 7 ** 15 6 MIN. QFF PRESSURE IN HPA 1007.4 1010.8 1015.7 ****** 1008.6 1008.0 1011.9 1013.4 1009.8 ****** 1009.9 1012.9 ****** DAY 19 5 31 ** 30 12 24 14 14 ** 8 26 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 864.6 863.4 864.4 ****** 864.5 866.6 872.9 875.0 870.7 ****** 866.8 867.9 ****** MAX. QFE PRESSURE IN HPA 872.0 870.2 871.0 ****** 870.0 873.3 876.8 882.3 885.0 ****** 874.0 878.2 ****** DAY 4 21 2 ** 18 2 12 29 7 ** 15 6 MIN. QFE PRESSURE IN HPA 852.9 852.4 860.8 ****** 858.8 862.8 867.3 868.0 861.8 ****** 857.0 858.4 ****** DAY 19 5 9 ** 9 18 19 14 14 ** 8 27 MEAN QNH PRESSURE IN HPA 1021.1 1019.7 1020.8 ****** 1020.9 1023.3 1030.5 1032.9 1028.0 ****** 1023.6 1024.8 ****** MAX. QNH PRESSURE IN HPA 1029.5 1027.4 1028.4 ****** 1027.2 1031.0 1035.0 1041.3 1044.4 ****** 1031.8 1036.6 ****** DAY 4 21 2 ** 18 2 12 29 7 ** 15 6 MIN. QNH PRESSURE IN HPA 1007.6 1007.1 1016.7 ****** 1014.4 1019.0 1024.1 1024.9 1017.8 ****** 1012.3 1013.9 ****** DAY 19 5 9 ** 9 18 19 14 14 ** 8 27 MEAN QFF PRESSURE IN HPA 1022.1 1020.9 1022.1 ****** 1014.7 1014.9 1018.7 1022.0 1018.5 ****** 1023.6 1028.4 ****** MAX. QFF PRESSURE IN HPA 1030.8 1028.1 1033.6 ****** 1022.4 1022.8 1022.1 1031.6 1035.3 ****** 1033.2 1041.9 ****** DAY 4 19 2 ** 18 2 2 30 7 ** 20 6 MIN. QFF PRESSURE IN HPA 1009.5 1007.1 1015.9 ****** 1009.1 1009.4 1013.1 1012.4 1008.5 ****** 1010.1 1012.9 ****** DAY 19 5 31 ** 30 12 19 14 14 ** 8 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.8 4.8 4.5 11.3 19.2 23.1 25.7 24.6 20.1 10.8 7.3 3.1 13.1 MINIMUN AIR TEMPERATURE (C) -1.1 0.9 0.6 4.7 11.2 13.9 17.3 15.3 12.0 6.0 2.2 0.0 6.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 0 1 0 0 0 3 DAYS WITH MINIMUM TEMP. <=-4 9 3 3 0 0 0 0 0 0 0 3 7 25 DAYS WITH FREEZING MIN.<= 0 16 10 13 4 0 0 0 0 0 1 10 15 69 TEMPERATURE RECORDS LOWEST(C) -7.0 -7.8 -5.0 -2.4 4.0 9.4 13.8 11.0 6.2 -0.4 -5.6 -12.6 -12.6 DAY 14 11 16 6 4 6 11 30 24 12 30 31 MAXIMUM AIR TEMPERATURE (C) 8.3 10.0 9.1 17.6 26.7 31.3 33.1 32.8 28.0 15.6 13.8 6.7 19.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 3 21 27 27 10 3 0 0 91 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 4 4 TEMPERATURE RECORDS HIGHEST(C) 15.0 19.6 15.0 25.0 30.0 37.6 38.0 39.0 33.0 31.0 21.2 13.8 39.0 DAY 31 3 8 25 1 24 14 3 5 2 18 11 DIF. BETWEEN (MAX.-MIN.) (C) 9.4 9.1 8.5 12.9 15.5 17.4 15.8 17.5 16.0 9.6 11.6 6.7 12.5 MEAN DAILY TEMP. (MDT) (C) 3.6 5.4 4.8 11.1 19.0 22.6 25.2 24.1 20.0 10.8 8.0 3.3 13.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 3.5 52.6 127.8 103.4 14.6 1.3 0.0 0.0 303.2 HEATING DEG. DAYS(BASE 18 0C) 447.4 325.5 407.8 206.5 13.3 0.0 0.0 0.1 9.1 231.0 300.5 454.4 2395.8 DEWPOINT (MEAN C) -3.3 -0.3 -1.5 2.3 7.3 10.0 14.0 11.8 9.7 4.8 0.3 -0.5 4.5 MIXING RATIO (G/KG) 3.54 4.39 4.09 5.41 7.66 9.22 12.08 10.45 9.09 6.38 4.64 4.48 6.79 VAPOUR PRESSURE (HPA) 4.91 6.06 5.63 7.44 10.51 12.59 16.42 14.26 12.47 8.82 6.45 6.19 9.31 SATURATION DEF. (HPA) 2.83 2.93 3.04 6.66 12.78 17.30 18.04 18.64 12.44 4.97 4.44 1.78 8.82 RELATIVE HUMIDITY (MEAN %) 67 72 68 58 49 46 51 47 54 72 65 78 61 RELATIVE HUMIDITY (MAX. %) 81 87 89 81 74 63 67 63 71 89 85 90 78 RELATIVE HUMIDITY (MIN. %) 48 56 45 38 33 32 37 35 40 56 43 65 44 RELATIVE HUMIDITY (MEAN% 03UTC) 74 79 78 73 71 60 66 62 70 86 81 84 74 RELATIVE HUMIDITY (MEAN% 09UTC) 60 66 60 46 40 39 49 42 49 64 52 71 53 RELATIVE HUMIDITY (MEAN% 15UTC) 61 64 60 47 37 35 40 38 43 67 55 78 52 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 19.2 32.2 40.6 16.6 19.5 3.2 2.0 0.0 0.0 110.4 25.0 154.7 423.4 DAYS WITH PRECIPITATION >=10 1 1 0 0 0 0 0 0 0 5 1 4 12 DAYS WITH PRECIPITATION >= 5 1 2 4 1 2 0 0 0 0 7 1 11 29 DAYS WITH PRECIPITATION >= 1 5 6 9 4 4 1 1 0 0 11 3 14 58 DAYS WITH PRECIPITATION 5 11 14 8 6 2 1 0 0 12 3 16 78 GREATEST DAILY PRECIPITATION 11.0 14.0 8.8 9.0 9.0 2.6 2.0 0.0 0.0 23.0 18.0 32.4 32.4 DAY 26 8 6 17 11 18 29 ** ** 30 3 23 DAY WITH THUNDER STORM 0 0 0 2 6 0 1 0 1 3 0 0 13 DAYS WITH SNOW OR SLEET 2 3 8 1 0 0 0 0 0 1 0 6 21 DAYS WITH DUST 0 0 0 0 0 0 0 0 3 0 0 0 3 WIND DIRECTION (PREVAILING) 45 45 360 45 45 45 225 180 45 45 225 225 45 PREVAILING WIND SPEED(KNOTS) 9.8 9.6 9.8 11.1 11.3 9.5 6.4 6.6 8.6 7.5 13.9 11.4 10.1 PREVAILING WIND PERCENT 16.1 17.0 25.4 16.7 20.2 11.3 11.3 8.9 8.8 5.8 18.8 25.8 11.6 CALMS PERCENT OF WIND 46.4 52.9 45.6 55.4 64.9 70.4 61.3 69.8 69.6 76.4 62.4 49.6 60.3 NO. OF WIND OBSERVATION 248 223 248 240 248 240 248 248 240 225 218 236 2862 VECTOR WIND DIRECTION (MEAN) 352 10 17 26 32 43 39 69 78 196 210 203 12 VECTOR WIND MAGNITUDE(KNOTS) 3.0 2.8 4.5 3.2 2.5 0.9 0.5 0.4 0.2 0.2 3.2 5.5 0.7 WIND STEADINESES (MEAN %) 53.6 65.1 86.5 72.7 75.8 37.5 15.2 16.7 8.7 11.1 72.7 93.2 18.4 WIND SPEED (MEAN KNOTS) 5.6 4.3 5.2 4.4 3.3 2.4 3.3 2.4 2.3 1.8 4.4 5.9 3.8 FASTEST WIND DIRECTION 280 30 30 330 40 10 30 40 60 230 210 200 330 FASTEST WIND SPEED (KNOTS) 25 29 25 39 27 19 23 19 17 17 31 33 39 DAY 2 25 6 13 2 2 17 11 5 3 21 12 DAYS WITH SKY CLEAR (0-2)/8 18 8 5 17 14 27 31 27 30 13 21 8 219 DAYS WITH P.CLOUDY (3-6)/8 12 14 19 8 15 2 0 4 0 8 7 12 101 DAYS WITH CLOUDY (7-8)/8 1 6 7 5 2 1 0 0 0 10 2 11 45 DAYS WITH VISIBILITY =< 2 KM 3 2 2 0 0 0 0 0 3 1 0 3 14 DURATION OF SUNSHINE HOURS 200.1 142.6 162.1 255.4 286.0 319.9 368.7 344.4 275.5 157.5 221.7 106.8 2840.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.8 865.7 860.9 864.5 864.7 862.8 863.1 863.5 866.8 869.6 870.8 867.2 865.6 MAX. QFE PRESSURE IN HPA 876.8 874.0 871.8 872.8 870.8 867.5 868.6 872.8 872.0 876.0 881.6 880.0 881.6 DAY-HOUR 17- 6 1- 6 23- 6 22- 3 13- 3 6- 6 11- 3 8- 6 25- 6 16- 6 30- 6 1- 0 MIN. QFE PRESSURE IN HPA 856.0 855.0 849.0 855.2 857.9 858.0 857.0 857.4 861.5 860.6 858.3 857.0 849.0 DAY-HOUR 6-12 10-12 13-15 3-21 21-15 12-15 2-15 25-12 5-15 4- 3 7- 3 23-21 MEAN QNH PRESSURE IN HPA 1024.7 1022.2 1016.8 1020.9 1021.1 1018.9 1019.3 1019.8 1023.5 1026.8 1028.1 1024.0 1022.2 MAX. QNH PRESSURE IN HPA 1035.0 1031.8 1029.3 1030.4 1028.1 1024.3 1025.6 1030.4 1029.5 1034.1 1040.5 1038.7 1040.5 DAY-HOUR 17- 6 1- 6 23- 6 22- 3 13- 3 6- 6 11- 3 8- 6 25- 6 16- 6 30- 6 1- 0 MIN. QNH PRESSURE IN HPA 1011.2 1010.0 1003.2 1010.3 1013.4 1013.5 1012.3 1012.8 1017.5 1016.5 1013.8 1012.3 1003.2 DAY-HOUR 6-12 10-12 13-15 3-21 21-15 12-15 2-15 25-12 5-15 4- 3 7- 3 23-21 MEAN QFF PRESSURE IN HPA 1026.8 1023.3 1017.6 1017.7 1013.2 1008.8 1007.6 1008.7 1015.1 1023.8 1028.6 1025.8 1018.1 MAX. QFF PRESSURE IN HPA 1039.8 1034.7 1031.6 1030.5 1023.9 1016.5 1016.3 1018.6 1024.3 1032.1 1045.5 1044.9 1045.5 DAY-HOUR 12- 6 12- 6 23- 6 22- 3 13- 3 6- 3 11- 3 8- 3 24- 6 10- 6 30- 6 1- 3 MIN. QFF PRESSURE IN HPA 1012.4 1010.9 1004.7 1004.1 1004.2 1004.2 1001.4 1001.5 1005.9 1006.5 1009.8 1012.7 1001.4 DAY-HOUR 6-12 25- 9 19- 6 25- 9 21-15 13-12 3- 0 25-12 6- 0 4- 0 7- 3 23-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 867.9 866.1 860.5 864.3 864.6 862.8 863.3 863.7 866.7 869.7 871.7 867.5 865.7 MAX. QFE PRESSURE IN HPA 876.0 873.4 870.0 872.0 869.6 866.0 868.0 871.0 871.0 874.5 880.6 880.0 880.6 DAY 12 1 23 22 13 6 11 8 26 16 30 1 MIN. QFE PRESSURE IN HPA 859.0 858.0 849.0 855.2 858.2 859.2 857.0 859.5 862.5 861.0 864.0 858.3 849.0 DAY 24 9 14 4 22 13 3 25 6 4 21 24 MEAN QNH PRESSURE IN HPA 1024.8 1022.8 1016.3 1020.7 1021.1 1019.0 1019.5 1020.0 1023.4 1026.9 1029.2 1024.3 1022.3 MAX. QNH PRESSURE IN HPA 1034.1 1031.1 1027.2 1029.5 1026.7 1022.6 1024.9 1028.4 1028.4 1032.4 1039.3 1038.7 1039.3 DAY 12 1 23 22 13 6 11 8 26 16 30 1 MIN. QNH PRESSURE IN HPA 1014.6 1013.5 1003.2 1010.3 1013.7 1014.9 1012.3 1015.2 1018.6 1016.9 1020.3 1013.8 1003.2 DAY 24 9 14 4 22 13 3 25 6 4 21 24 MEAN QFF PRESSURE IN HPA 1026.4 1023.4 1016.8 1017.4 1013.1 1009.0 1007.7 1008.8 1014.7 1023.2 1028.3 1025.7 1017.9 MAX. QFF PRESSURE IN HPA 1037.2 1032.7 1029.6 1029.0 1021.7 1014.4 1015.6 1015.7 1023.3 1029.4 1043.8 1042.7 1043.8 DAY 12 7 23 22 13 6 11 8 24 11 30 1 MIN. QFF PRESSURE IN HPA 1012.6 1014.1 1005.5 1005.7 1004.8 1005.5 1001.4 1003.5 1005.9 1006.5 1015.2 1014.4 1001.4 DAY 24 9 14 19 22 13 3 15 6 4 21 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 867.8 865.9 860.7 864.6 865.1 863.4 863.9 864.2 867.2 869.6 870.2 867.3 865.8 MAX. QFE PRESSURE IN HPA 876.0 873.7 870.4 872.8 870.8 867.0 868.6 872.0 871.0 875.0 880.6 880.0 880.6 DAY 17 1 23 22 13 28 11 8 25 16 30 1 MIN. QFE PRESSURE IN HPA 858.5 858.0 850.0 856.0 859.9 860.0 857.4 859.7 863.0 860.6 858.3 859.0 850.0 DAY 6 10 14 19 22 9 3 25 6 4 7 24 MEAN QNH PRESSURE IN HPA 1024.6 1022.5 1016.6 1021.0 1021.6 1019.7 1020.2 1020.6 1024.1 1026.7 1027.5 1024.2 1022.4 MAX. QNH PRESSURE IN HPA 1034.1 1031.4 1027.7 1030.4 1028.1 1023.8 1025.6 1029.5 1028.4 1032.9 1039.3 1038.7 1039.3 DAY 17 1 23 22 13 28 11 8 25 16 30 1 MIN. QNH PRESSURE IN HPA 1014.0 1013.5 1004.3 1011.2 1015.6 1015.8 1012.8 1015.4 1019.2 1016.5 1013.8 1014.6 1004.3 DAY 6 10 14 19 22 9 3 25 6 4 7 24 MEAN QFF PRESSURE IN HPA 1027.4 1024.0 1017.8 1018.5 1014.5 1010.3 1009.2 1010.6 1016.5 1024.5 1027.5 1026.5 1018.9 MAX. QFF PRESSURE IN HPA 1038.6 1034.1 1030.3 1030.5 1023.9 1016.5 1016.3 1018.6 1024.1 1031.1 1045.3 1044.9 1045.3 DAY 17 22 23 22 13 6 11 8 24 10 30 1 MIN. QFF PRESSURE IN HPA 1014.8 1014.7 1007.3 1004.3 1006.3 1005.5 1002.1 1005.1 1007.5 1007.2 1009.8 1015.8 1002.1 DAY 24 10 14 25 22 2 3 15 6 4 7 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 868.6 866.4 861.6 865.0 865.4 863.8 864.3 864.6 868.0 870.3 871.1 868.0 866.4 MAX. QFE PRESSURE IN HPA 876.8 874.0 871.8 872.8 870.6 867.5 868.6 872.8 872.0 876.0 881.6 880.0 881.6 DAY 17 1 23 22 13 6 11 8 25 16 30 1 MIN. QFE PRESSURE IN HPA 858.0 858.0 850.0 856.6 860.0 860.0 859.0 860.4 864.0 861.8 859.5 859.0 850.0 DAY 6 10 19 4 23 9 3 25 6 4 7 23 MEAN QNH PRESSURE IN HPA 1025.6 1023.1 1017.6 1021.5 1022.0 1020.1 1020.7 1021.0 1024.9 1027.6 1028.5 1024.9 1023.1 MAX. QNH PRESSURE IN HPA 1035.0 1031.8 1029.3 1030.4 1027.9 1024.3 1025.6 1030.4 1029.5 1034.1 1040.5 1038.7 1040.5 DAY 17 1 23 22 13 6 11 8 25 16 30 1 MIN. QNH PRESSURE IN HPA 1013.5 1013.5 1004.3 1011.9 1015.8 1015.8 1014.6 1016.2 1020.3 1017.8 1015.2 1014.6 1004.3 DAY 6 10 19 4 23 9 3 25 6 4 7 23 MEAN QFF PRESSURE IN HPA 1028.3 1024.4 1018.5 1018.5 1013.9 1009.6 1008.8 1009.8 1016.3 1024.9 1030.6 1027.1 1019.2 MAX. QFF PRESSURE IN HPA 1039.8 1034.7 1031.6 1029.2 1022.6 1015.9 1015.8 1018.5 1024.3 1032.1 1045.5 1044.4 1045.5 DAY 12 12 23 22 13 6 11 8 24 10 30 1 MIN. QFF PRESSURE IN HPA 1014.2 1014.3 1004.7 1004.5 1005.9 1005.3 1003.1 1004.4 1008.6 1009.6 1018.7 1014.9 1003.1 DAY 6 10 19 25 23 9 16 15 6 4 21 23 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 868.1 866.0 861.2 864.6 864.9 863.0 863.5 863.8 867.1 869.8 870.4 867.3 865.8 MAX. QFE PRESSURE IN HPA 875.4 873.6 871.0 871.6 870.0 866.2 867.6 871.8 871.5 874.8 880.8 879.0 880.8 DAY 17 1 23 22 13 30 11 8 25 16 30 1 MIN. QFE PRESSURE IN HPA 857.0 857.0 850.0 856.4 860.0 859.8 858.8 859.4 863.0 861.8 858.5 858.2 850.0 DAY 6 10 19 4 23 13 3 25 11 4 7 23 MEAN QNH PRESSURE IN HPA 1025.1 1022.6 1017.2 1021.0 1021.3 1019.2 1019.7 1020.1 1023.9 1027.0 1027.7 1024.1 1022.4 MAX. QNH PRESSURE IN HPA 1033.4 1031.3 1028.4 1029.0 1027.2 1022.9 1024.5 1029.3 1028.9 1032.7 1039.6 1037.5 1039.6 DAY 17 1 23 22 13 30 11 8 25 16 30 1 MIN. QNH PRESSURE IN HPA 1012.3 1012.3 1004.3 1011.6 1015.8 1015.5 1014.4 1015.1 1019.2 1017.8 1014.0 1013.7 1004.3 DAY 6 10 19 4 23 13 3 25 11 4 7 23 MEAN QFF PRESSURE IN HPA 1026.7 1023.0 1017.7 1017.3 1013.1 1008.6 1007.6 1008.3 1014.9 1023.6 1029.0 1025.3 1017.9 MAX. QFF PRESSURE IN HPA 1036.6 1033.4 1029.9 1026.8 1021.1 1013.5 1014.2 1016.8 1022.1 1030.3 1043.6 1041.6 1043.6 DAY 12 6 23 22 13 6 11 8 24 10 30 1 MIN. QFF PRESSURE IN HPA 1012.8 1010.9 1004.8 1004.1 1005.7 1005.0 1002.7 1003.5 1007.8 1009.5 1016.8 1013.6 1002.7 DAY 6 25 19 25 23 24 16 25 5 4 21 23 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 866.8 864.6 860.4 863.8 863.9 862.0 862.3 862.4 866.0 868.9 869.5 866.4 864.8 MAX. QFE PRESSURE IN HPA 874.0 872.0 869.0 869.5 868.0 865.0 866.5 869.8 870.0 873.8 879.9 877.2 879.9 DAY 17 1 23 22 13 22 10 8 25 15 30 1 MIN. QFE PRESSURE IN HPA 856.0 855.0 850.7 855.7 859.0 858.4 857.0 857.4 861.8 861.0 859.4 858.4 850.7 DAY 6 10 13 4 24 13 3 25 5 4 6 23 MEAN QNH PRESSURE IN HPA 1023.6 1021.0 1016.3 1020.1 1020.3 1018.1 1018.4 1018.5 1022.7 1026.0 1026.6 1023.1 1021.2 MAX. QNH PRESSURE IN HPA 1031.8 1029.5 1026.1 1026.6 1024.9 1021.5 1023.2 1027.0 1027.2 1031.6 1038.5 1035.4 1038.5 DAY 17 1 23 22 13 22 10 8 25 15 30 1 MIN. QNH PRESSURE IN HPA 1011.2 1010.0 1005.1 1010.8 1014.6 1013.9 1012.3 1012.8 1017.8 1016.9 1015.1 1013.9 1005.1 DAY 6 10 13 4 24 13 3 25 5 4 6 23 MEAN QFF PRESSURE IN HPA 1024.9 1021.8 1016.7 1016.6 1012.1 1007.7 1006.1 1006.9 1013.6 1022.5 1027.6 1024.4 1016.8 MAX. QFF PRESSURE IN HPA 1034.3 1032.3 1027.9 1024.9 1019.1 1011.1 1012.7 1014.1 1019.9 1028.6 1042.4 1039.1 1042.4 DAY 12 6 22 21 13 6 11 8 23 10 30 1 MIN. QFF PRESSURE IN HPA 1012.4 1010.9 1007.0 1004.6 1005.3 1004.2 1001.6 1001.5 1007.2 1009.3 1016.6 1014.1 1001.5 DAY 6 10 19 25 24 13 3 25 5 3 21 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.4 865.0 860.6 863.7 863.8 861.7 861.8 862.2 865.6 869.2 870.0 866.8 864.8 MAX. QFE PRESSURE IN HPA 874.8 872.4 869.0 869.0 868.0 864.5 866.0 868.4 870.0 874.0 880.2 877.5 880.2 DAY 17 1 22 21 12 29 10 7 25 16 30 1 MIN. QFE PRESSURE IN HPA 856.0 857.5 849.0 856.0 857.9 858.0 857.0 858.0 861.5 862.2 859.5 859.2 849.0 DAY 6 8 13 3 21 12 2 25 5 3 6 23 MEAN QNH PRESSURE IN HPA 1024.2 1021.5 1016.4 1020.0 1020.1 1017.7 1017.9 1018.3 1022.2 1026.3 1027.2 1023.6 1021.3 MAX. QNH PRESSURE IN HPA 1032.7 1030.0 1026.1 1026.1 1024.9 1020.9 1022.6 1025.4 1027.2 1031.8 1038.9 1035.8 1038.9 DAY 17 1 22 21 12 29 10 7 25 16 30 1 MIN. QNH PRESSURE IN HPA 1011.2 1012.9 1003.2 1011.2 1013.4 1013.5 1012.3 1013.5 1017.5 1018.3 1015.2 1014.9 1003.2 DAY 6 8 13 3 21 12 2 25 5 3 6 23 MEAN QFF PRESSURE IN HPA 1026.8 1023.2 1017.5 1017.3 1012.9 1007.9 1006.6 1008.0 1014.5 1024.2 1027.2 1025.9 1017.7 MAX. QFF PRESSURE IN HPA 1036.8 1033.2 1029.2 1026.6 1018.9 1011.8 1012.7 1014.2 1020.8 1031.9 1045.0 1041.5 1045.0 DAY 17 6 22 21 12 5 11 7 30 27 30 1 MIN. QFF PRESSURE IN HPA 1013.0 1012.6 1005.7 1005.0 1004.2 1004.5 1001.4 1004.0 1007.7 1010.4 1010.5 1016.3 1001.4 DAY 6 8 13 25 21 13 2 24 5 3 6 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 868.1 865.8 861.3 864.7 864.8 862.6 862.9 863.5 866.7 869.9 872.1 867.3 865.8 MAX. QFE PRESSURE IN HPA 875.8 873.0 870.0 871.0 869.8 865.0 867.0 870.0 870.6 874.0 880.8 878.0 880.8 DAY 11 6 23 21 12 5 10 7 25 15 30 1 MIN. QFE PRESSURE IN HPA 857.4 858.5 850.8 856.0 858.1 859.0 857.7 859.2 862.6 862.4 865.0 858.2 850.8 DAY 6 8 13 3 21 8 2 25 10 3 20 23 MEAN QNH PRESSURE IN HPA 1025.0 1022.4 1017.3 1021.2 1021.3 1018.7 1019.1 1019.8 1023.5 1027.1 1029.6 1024.1 1022.4 MAX. QNH PRESSURE IN HPA 1033.8 1030.6 1027.2 1028.4 1027.0 1021.5 1023.8 1027.2 1027.9 1031.8 1039.6 1036.4 1039.6 DAY 11 6 23 21 12 5 10 7 25 15 30 1 MIN. QNH PRESSURE IN HPA 1012.8 1014.0 1005.2 1011.2 1013.6 1014.6 1013.1 1014.9 1018.7 1018.5 1021.5 1013.7 1005.2 DAY 6 8 13 3 21 8 2 25 10 3 20 23 MEAN QFF PRESSURE IN HPA 1027.6 1024.0 1018.1 1018.1 1013.3 1008.4 1007.3 1008.7 1015.0 1024.1 1029.9 1026.1 1018.4 MAX. QFF PRESSURE IN HPA 1038.8 1034.2 1029.4 1028.3 1021.0 1013.5 1014.0 1015.0 1022.5 1030.1 1044.4 1041.6 1044.4 DAY 11 6 22 21 12 5 10 7 23 10 30 1 MIN. QFF PRESSURE IN HPA 1014.1 1013.1 1005.8 1007.3 1004.7 1004.6 1002.0 1004.3 1007.4 1009.1 1017.6 1014.5 1002.0 DAY 6 3 13 25 21 8 2 25 5 3 20 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 868.0 865.6 861.2 864.9 864.9 862.9 863.3 863.8 866.9 870.0 872.2 867.0 865.9 MAX. QFE PRESSURE IN HPA 876.0 872.7 870.0 872.0 869.6 865.8 867.6 871.0 871.0 874.5 880.8 878.0 880.8 DAY 11 6 22 21 12 27 10 7 25 15 30 1 MIN. QFE PRESSURE IN HPA 858.4 858.5 850.4 855.2 858.6 859.2 857.5 859.6 862.8 862.0 864.2 857.0 850.4 DAY 6 8 13 3 21 8 2 25 10 3 20 23 MEAN QNH PRESSURE IN HPA 1025.0 1022.2 1017.1 1021.4 1021.4 1019.0 1019.5 1020.2 1023.7 1027.2 1029.8 1023.7 1022.5 MAX. QNH PRESSURE IN HPA 1034.1 1030.3 1027.2 1029.5 1026.7 1022.4 1024.5 1028.4 1028.4 1032.4 1039.6 1036.4 1039.6 DAY 11 6 22 21 12 27 10 7 25 15 30 1 MIN. QNH PRESSURE IN HPA 1013.9 1014.0 1004.8 1010.3 1014.2 1014.9 1012.9 1015.3 1019.0 1018.1 1020.6 1012.3 1004.8 DAY 6 8 13 3 21 8 2 25 10 3 20 23 MEAN QFF PRESSURE IN HPA 1026.6 1023.1 1017.6 1017.7 1013.2 1008.7 1007.7 1008.8 1015.1 1023.6 1029.2 1025.0 1018.0 MAX. QFF PRESSURE IN HPA 1037.7 1033.8 1029.2 1029.3 1021.0 1014.2 1014.7 1015.9 1022.8 1029.4 1043.8 1040.1 1043.8 DAY 11 6 22 21 12 5 10 7 23 10 30 1 MIN. QFF PRESSURE IN HPA 1012.9 1014.8 1007.2 1006.1 1005.1 1004.6 1001.6 1003.8 1006.3 1007.5 1015.6 1012.7 1001.6 DAY 23 8 13 3 21 8 2 24 5 3 20 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.4 -0.1 5.7 10.9 17.5 21.4 24.2 23.8 21.1 14.9 7.4 3.0 12.3 MINIMUN AIR TEMPERATURE (C) -5.1 -2.8 1.7 5.6 10.7 13.0 16.4 16.6 11.6 8.2 2.4 -0.8 6.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 1 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 20 13 1 0 0 0 0 0 0 0 2 9 45 DAYS WITH FREEZING MIN.<= 0 27 22 11 4 0 0 0 0 0 0 10 19 93 TEMPERATURE RECORDS LOWEST(C) -14.6 -9.0 -4.8 -1.6 4.4 10.0 11.0 10.4 8.6 2.0 -6.0 -12.0 -14.6 DAY 20 19 6 1 7 24 28 25 30 23 14 29 MAXIMUM AIR TEMPERATURE (C) 0.8 3.2 10.3 16.6 24.0 28.4 30.8 29.6 27.8 21.9 12.7 7.9 17.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 10 18 12 7 0 0 0 47 DAYS WITH MAXIMUM TEMP. <= 0 11 9 0 0 0 0 0 0 0 0 0 3 23 TEMPERATURE RECORDS HIGHEST(C) 5.4 11.0 16.0 23.4 29.4 34.4 39.0 37.0 33.2 26.6 20.6 16.4 39.0 DAY 25 23 19 17 27 13 31 1 8 5 3 10 DIF. BETWEEN (MAX.-MIN.) (C) 5.9 6.0 8.6 11.0 13.3 15.4 14.4 13.0 16.2 13.7 10.3 8.7 11.4 MEAN DAILY TEMP. (MDT) (C) -2.1 0.2 6.0 11.1 17.3 20.7 23.6 23.1 19.7 15.0 7.6 3.5 12.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 3.0 18.6 79.4 69.0 10.1 0.0 0.0 0.0 180.1 HEATING DEG. DAYS(BASE 18 0C) 624.0 516.0 360.6 206.9 43.3 1.8 0.0 0.1 6.7 92.3 313.1 448.0 2612.9 DEWPOINT (MEAN C) -4.8 -3.4 -0.4 4.0 5.8 5.5 11.9 10.1 5.2 3.8 -1.8 -3.3 2.7 MIXING RATIO (G/KG) 3.18 3.55 4.42 6.17 6.90 6.78 10.57 9.34 6.62 5.97 4.10 3.64 5.94 VAPOUR PRESSURE (HPA) 4.41 4.90 6.07 8.48 9.47 9.27 14.34 12.72 9.10 8.25 5.66 5.03 8.14 SATURATION DEF. (HPA) 0.89 1.37 3.40 5.12 11.47 17.45 17.11 17.79 17.46 9.57 5.25 3.13 9.17 RELATIVE HUMIDITY (MEAN %) 84 79 68 65 49 38 48 45 39 52 56 66 57 RELATIVE HUMIDITY (MAX. %) 92 90 87 88 70 61 64 63 57 73 78 82 75 RELATIVE HUMIDITY (MIN. %) 75 68 50 45 33 25 37 31 26 34 36 51 43 RELATIVE HUMIDITY (MEAN% 03UTC) 87 85 80 82 70 57 63 62 56 68 64 77 71 RELATIVE HUMIDITY (MEAN% 09UTC) 81 75 58 53 39 29 42 37 32 40 43 56 49 RELATIVE HUMIDITY (MEAN% 15UTC) 85 76 61 53 36 29 38 35 29 44 55 63 50 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 80.2 64.7 124.1 53.0 7.0 4.8 0.0 2.5 0.0 34.0 28.0 37.7 436.0 DAYS WITH PRECIPITATION >=10 4 1 4 1 0 0 0 0 0 2 0 2 14 DAYS WITH PRECIPITATION >= 5 7 5 8 5 1 0 0 0 0 2 3 3 34 DAYS WITH PRECIPITATION >= 1 11 11 13 13 1 3 0 1 0 5 6 5 69 DAYS WITH PRECIPITATION 12 11 15 16 1 4 0 2 0 5 11 7 84 GREATEST DAILY PRECIPITATION 23.0 16.0 32.4 10.0 7.0 2.0 0.0 2.4 0.0 16.0 8.3 13.0 32.4 DAY 18 1 8 29 1 30 ** 4 ** 15 10 17 DAY WITH THUNDER STORM 2 0 1 1 0 0 0 0 0 0 0 0 4 DAYS WITH SNOW OR SLEET 10 9 4 0 0 0 0 0 0 0 1 5 29 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 180 180 180 180 225 360 45 45 225 180 180 180 PREVAILING WIND SPEED(KNOTS) 12.7 12.5 12.4 10.2 11.9 12.3 8.8 8.2 7.1 14.1 12.6 11.1 11.7 PREVAILING WIND PERCENT 19.4 13.8 30.3 17.6 19.0 15.0 10.5 23.1 11.6 17.7 31.4 23.4 16.5 CALMS PERCENT OF WIND 68.5 71.1 48.0 60.7 54.4 65.0 73.4 47.6 61.8 65.7 41.4 56.0 59.6 NO. OF WIND OBSERVATION 248 232 244 239 248 240 248 212 173 248 239 248 2819 VECTOR WIND DIRECTION (MEAN) 194 202 198 204 206 205 21 22 204 204 200 198 201 VECTOR WIND MAGNITUDE(KNOTS) 3.0 3.0 6.1 2.3 4.3 2.3 1.3 1.6 1.2 3.7 6.5 4.4 2.8 WIND STEADINESES (MEAN %) 78.9 85.7 92.4 62.2 79.6 62.2 56.5 35.6 30.0 86.0 91.5 93.6 62.2 WIND SPEED (MEAN KNOTS) 3.8 3.5 6.6 3.7 5.4 3.7 2.3 4.5 4.0 4.3 7.1 4.7 4.5 FASTEST WIND DIRECTION 210 210 210 210 230 220 30 220 270 210 200 220 230 FASTEST WIND SPEED (KNOTS) 27 33 33 21 35 27 29 19 27 31 29 23 35 DAY 31 29 3 28 9 14 1 29 5 4 8 27 DAYS WITH SKY CLEAR (0-2)/8 6 6 16 9 26 24 30 28 30 17 17 12 221 DAYS WITH P.CLOUDY (3-6)/8 10 8 11 12 5 6 1 2 0 11 10 16 92 DAYS WITH CLOUDY (7-8)/8 15 15 4 9 0 0 0 1 0 3 3 3 53 DAYS WITH VISIBILITY =< 2 KM 7 1 0 1 0 0 0 0 0 0 0 3 12 DURATION OF SUNSHINE HOURS 71.8 108.5 233.7 184.3 351.3 326.5 367.5 331.7 304.5 219.5 201.0 172.7 2873.0 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.1 865.6 860.9 864.0 863.5 860.9 859.1 860.2 864.4 867.1 866.8 865.1 863.7 MAX. QFE PRESSURE IN HPA 878.0 876.6 870.0 875.0 869.8 866.6 864.0 867.6 869.9 873.8 874.7 873.4 878.0 DAY-HOUR 9-18 6- 6 17- 6 8- 9 16- 9 12- 6 27- 6 21- 3 29- 6 16- 9 6- 6 21-18 MIN. QFE PRESSURE IN HPA 858.2 850.6 847.8 856.0 855.6 853.0 854.0 854.6 859.2 859.2 857.2 846.1 846.1 DAY-HOUR 28-12 1-12 4-12 30-21 1- 0 30-15 25-15 29-15 17-12 30-15 19-18 27- 3 MEAN QNH PRESSURE IN HPA 1023.9 1022.2 1016.8 1020.3 1019.7 1016.8 1014.7 1016.0 1020.9 1023.9 1023.6 1021.6 1020.0 MAX. QNH PRESSURE IN HPA 1036.4 1034.8 1027.2 1032.9 1027.0 1023.3 1020.3 1024.5 1027.1 1031.6 1032.6 1031.1 1036.4 DAY-HOUR 9-18 6- 6 17- 6 8- 9 16- 9 12- 6 27- 6 21- 3 29- 6 16- 9 6- 6 21-18 MIN. QNH PRESSURE IN HPA 1013.7 1005.0 1001.8 1011.2 1010.7 1007.7 1008.9 1009.6 1014.9 1014.9 1012.6 999.9 999.9 DAY-HOUR 28-12 1-12 4-12 30-21 1- 0 30-15 25-15 29-15 17-12 30-15 19-18 27- 3 MEAN QFF PRESSURE IN HPA 1029.3 1026.0 1016.8 1017.3 1012.9 1007.7 1003.8 1005.5 ****** 1018.6 1022.8 1023.4 ****** MAX. QFF PRESSURE IN HPA 1043.6 1040.7 1028.5 1032.4 1022.4 1013.9 1011.7 1015.2 ****** 1029.8 1034.2 1038.8 ****** DAY-HOUR 9- 6 6- 6 17- 3 8- 9 5- 6 27- 6 27- 3 21- 3 **-** 16- 9 23- 3 29- 3 MIN. QFF PRESSURE IN HPA 1015.7 1005.2 1001.6 1006.2 1004.3 1001.0 996.5 998.5 ****** 1008.7 1010.4 1001.9 ****** DAY-HOUR 31-21 1-12 3- 3 30-21 28- 0 30-15 15-12 1- 9 **-** 30- 0 19-18 26-18 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 867.0 865.4 860.2 863.8 863.4 861.0 859.3 860.0 ****** 866.9 867.0 865.1 ****** MAX. QFE PRESSURE IN HPA 878.0 874.8 869.6 872.8 869.0 865.0 862.9 863.0 ****** 872.4 872.9 871.5 ****** DAY 10 6 17 9 16 13 31 6 ** 17 6 22 MIN. QFE PRESSURE IN HPA 859.0 852.5 850.3 858.2 855.6 856.5 856.0 856.2 ****** 861.2 859.0 846.9 ****** DAY 26 2 3 30 1 24 15 3 ** 30 20 27 MEAN QNH PRESSURE IN HPA 1023.8 1022.0 1016.0 1020.1 1019.7 1017.0 1014.9 1015.8 ****** 1023.7 1023.7 1021.6 ****** MAX. QNH PRESSURE IN HPA 1036.4 1032.7 1026.7 1030.4 1026.1 1021.5 1019.1 1019.2 ****** 1030.0 1030.5 1028.9 ****** DAY 10 6 17 9 16 13 31 6 ** 17 6 22 MIN. QNH PRESSURE IN HPA 1014.6 1007.2 1004.7 1013.7 1010.7 1011.8 1011.2 1011.4 ****** 1017.1 1014.6 1000.8 ****** DAY 26 2 3 30 1 24 15 3 ** 30 20 27 MEAN QFF PRESSURE IN HPA 1029.1 1025.6 1015.7 1016.8 1012.7 1007.9 1004.1 1005.0 ****** 1018.0 1022.5 1022.9 ****** MAX. QFF PRESSURE IN HPA 1042.1 1038.4 1026.5 1030.5 1021.6 1012.8 1009.9 1011.0 ****** 1026.4 1032.6 1037.3 ****** DAY 10 7 17 9 6 4 27 6 ** 17 15 29 MIN. QFF PRESSURE IN HPA 1016.0 1007.9 1003.4 1008.9 1004.3 1002.4 999.3 999.7 ****** 1008.7 1012.6 1002.0 ****** DAY 26 2 3 29 28 17 15 2 ** 30 19 27 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.9 865.5 860.5 864.1 863.7 861.7 859.8 861.1 864.8 867.2 866.9 865.0 863.9 MAX. QFE PRESSURE IN HPA 878.0 875.2 869.6 872.0 869.2 865.6 863.4 867.6 869.0 871.9 873.4 871.5 878.0 DAY 10 6 17 9 16 13 27 21 29 17 6 3 MIN. QFE PRESSURE IN HPA 858.8 853.0 849.6 858.6 855.8 857.0 856.0 856.4 860.4 862.0 860.4 846.1 846.1 DAY 26 2 3 30 1 24 15 29 17 30 19 27 MEAN QNH PRESSURE IN HPA 1023.7 1022.1 1016.3 1020.5 1020.0 1017.7 1015.6 1017.0 1021.3 1024.0 1023.7 1021.5 1020.3 MAX. QNH PRESSURE IN HPA 1036.4 1033.2 1026.7 1029.5 1026.3 1022.2 1019.7 1024.5 1026.1 1029.4 1031.1 1028.9 1036.4 DAY 10 6 17 9 16 13 27 21 29 17 6 3 MIN. QNH PRESSURE IN HPA 1014.4 1007.7 1003.9 1014.2 1011.0 1012.3 1011.2 1011.6 1016.2 1018.1 1016.2 999.9 999.9 DAY 26 2 3 30 1 24 15 29 17 30 19 27 MEAN QFF PRESSURE IN HPA 1029.5 1026.2 1016.8 1018.0 1013.9 1009.2 1005.4 1007.1 1013.9 1019.6 1023.6 1024.0 1017.3 MAX. QFF PRESSURE IN HPA 1043.0 1039.0 1028.5 1030.2 1021.8 1013.9 1011.7 1015.2 1021.3 1027.2 1034.2 1038.8 1043.0 DAY 3 6 17 9 6 4 27 21 30 16 23 29 MIN. QFF PRESSURE IN HPA 1015.9 1009.0 1001.6 1010.2 1006.3 1004.5 999.1 1000.3 1007.2 1012.0 1013.0 1002.1 999.1 DAY 26 2 3 29 1 16 15 29 9 30 19 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.8 866.5 861.4 864.9 864.1 861.8 860.1 861.4 865.4 868.3 867.7 865.9 864.6 MAX. QFE PRESSURE IN HPA 878.0 876.6 870.0 874.0 869.5 866.6 864.0 867.3 869.9 873.4 874.7 872.8 878.0 DAY 10 6 17 8 16 12 27 21 29 16 6 3 MIN. QFE PRESSURE IN HPA 859.5 854.8 850.0 859.0 856.0 857.3 856.2 856.8 860.8 861.6 860.0 847.4 847.4 DAY 26 2 4 30 1 24 15 29 17 30 28 27 MEAN QNH PRESSURE IN HPA 1024.6 1023.2 1017.3 1021.4 1020.5 1017.9 1015.9 1017.4 1022.0 1025.2 1024.6 1022.6 1021.0 MAX. QNH PRESSURE IN HPA 1036.4 1034.8 1027.2 1031.8 1026.6 1023.3 1020.3 1024.1 1027.1 1031.1 1032.6 1030.4 1036.4 DAY 10 6 17 8 16 12 27 21 29 16 6 3 MIN. QNH PRESSURE IN HPA 1015.2 1009.8 1004.3 1014.6 1011.2 1012.7 1011.4 1012.1 1016.7 1017.6 1015.8 1001.3 1001.3 DAY 26 2 4 30 1 24 15 29 17 30 28 27 MEAN QFF PRESSURE IN HPA 1030.4 1027.3 1017.4 1018.7 1013.5 1008.6 1005.0 1006.5 ****** 1020.0 1024.0 1024.8 ****** MAX. QFF PRESSURE IN HPA 1043.6 1040.7 1027.8 1031.7 1022.4 1013.9 1011.2 1011.7 ****** 1029.8 1033.8 1038.4 ****** DAY 9 6 17 9 5 27 27 5 ** 16 15 29 MIN. QFF PRESSURE IN HPA 1016.8 1010.6 1003.7 1010.6 1006.0 1002.3 998.4 999.5 ****** 1011.4 1014.5 1004.2 ****** DAY 26 2 3 30 1 15 15 1 ** 30 19 27 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 867.4 866.3 861.3 864.5 863.6 861.1 859.4 860.6 864.4 867.4 866.9 865.3 864.0 MAX. QFE PRESSURE IN HPA 878.0 876.0 869.0 875.0 869.8 866.0 863.0 866.5 869.1 873.8 873.7 872.8 878.0 DAY 10 6 16 8 16 12 27 21 30 16 6 21 MIN. QFE PRESSURE IN HPA 859.3 854.0 849.0 858.8 856.0 856.2 855.7 856.5 860.2 861.6 859.5 849.0 849.0 DAY 26 1 4 20 1 30 15 29 17 30 28 26 MEAN QNH PRESSURE IN HPA 1024.3 1022.9 1017.2 1020.9 1019.9 1017.0 1015.1 1016.5 1020.8 1024.2 1023.7 1021.8 1020.4 MAX. QNH PRESSURE IN HPA 1036.4 1034.1 1026.1 1032.9 1027.0 1022.6 1019.2 1023.2 1026.2 1031.6 1031.4 1030.4 1036.4 DAY 10 6 16 8 16 12 27 21 30 16 6 21 MIN. QNH PRESSURE IN HPA 1015.0 1008.9 1003.2 1014.4 1011.2 1011.4 1010.8 1011.8 1016.0 1017.6 1015.2 1003.2 1003.2 DAY 26 1 4 20 1 30 15 29 17 30 28 26 MEAN QFF PRESSURE IN HPA 1029.5 1026.6 1016.8 1017.4 1012.6 1007.5 1003.8 1005.3 ****** 1018.3 1022.4 1023.0 ****** MAX. QFF PRESSURE IN HPA 1043.4 1039.9 1026.0 1032.4 1022.4 1013.1 1010.1 1011.4 ****** 1029.8 1030.5 1036.4 ****** DAY 9 6 16 8 5 26 27 5 ** 16 15 29 MIN. QFF PRESSURE IN HPA 1016.1 1009.3 1004.5 1008.2 1005.3 1001.8 998.0 998.5 ****** 1012.1 1013.9 1003.6 ****** DAY 26 1 4 20 9 16 15 1 ** 30 28 26 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 866.4 864.8 860.4 863.3 862.7 860.1 858.2 859.4 863.1 866.2 866.0 864.3 862.9 MAX. QFE PRESSURE IN HPA 877.0 875.4 868.0 873.6 868.7 865.3 861.0 864.6 867.0 872.4 871.8 872.6 877.0 DAY 9 6 16 8 16 12 30 21 29 16 6 21 MIN. QFE PRESSURE IN HPA 858.2 850.6 847.8 857.8 856.0 854.7 854.4 855.3 859.2 859.7 859.6 848.5 847.8 DAY 28 1 4 20 1 30 15 29 17 30 19 26 MEAN QNH PRESSURE IN HPA 1023.1 1021.3 1016.2 1019.5 1018.8 1015.9 1013.7 1015.0 1019.3 1022.9 1022.6 1020.7 1019.1 MAX. QNH PRESSURE IN HPA 1035.2 1033.4 1024.9 1031.3 1025.7 1021.8 1016.9 1021.0 1023.8 1030.0 1029.3 1030.2 1035.2 DAY 9 6 16 8 16 12 30 21 29 16 6 21 MIN. QNH PRESSURE IN HPA 1013.7 1005.0 1001.8 1013.2 1011.2 1009.7 1009.4 1010.4 1014.9 1015.4 1015.3 1002.6 1001.8 DAY 28 1 4 20 1 30 15 29 17 30 19 26 MEAN QFF PRESSURE IN HPA 1028.3 1024.8 1016.0 1016.1 1011.7 1006.7 1002.5 1004.2 ****** 1017.2 1021.4 1022.0 ****** MAX. QFF PRESSURE IN HPA 1041.9 1038.9 1025.1 1031.0 1021.2 1012.8 1006.9 1010.4 ****** 1027.4 1030.8 1035.8 ****** DAY 9 6 16 8 5 26 27 20 ** 16 14 29 MIN. QFF PRESSURE IN HPA 1015.8 1005.2 1003.1 1007.6 1004.9 1001.4 996.5 999.3 ****** 1008.9 1013.1 1002.5 ****** DAY 28 1 4 20 27 30 15 11 ** 30 19 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.8 865.2 861.1 863.3 862.7 859.9 857.8 859.1 863.1 866.6 866.5 864.8 863.1 MAX. QFE PRESSURE IN HPA 877.4 875.0 869.0 873.0 868.2 865.0 861.0 864.4 867.6 872.8 872.7 873.1 877.4 DAY 9 6 16 8 16 12 30 21 30 16 6 21 MIN. QFE PRESSURE IN HPA 859.0 851.0 847.8 857.0 856.8 853.0 854.0 854.6 859.2 859.2 857.8 849.0 847.8 DAY 28 1 4 30 1 30 25 29 17 30 19 26 MEAN QNH PRESSURE IN HPA 1023.6 1021.7 1017.0 1019.5 1018.9 1015.6 1013.2 1014.7 1019.3 1023.3 1023.2 1021.3 1019.3 MAX. QNH PRESSURE IN HPA 1035.7 1032.9 1026.1 1030.6 1025.2 1021.5 1016.9 1020.8 1024.5 1030.4 1030.3 1030.8 1035.7 DAY 9 6 16 8 16 12 30 21 30 16 6 21 MIN. QNH PRESSURE IN HPA 1014.6 1005.5 1001.8 1012.3 1012.1 1007.7 1008.9 1009.6 1014.9 1014.9 1013.2 1003.2 1001.8 DAY 28 1 4 30 1 30 25 29 17 30 19 26 MEAN QFF PRESSURE IN HPA 1029.2 1025.7 1017.5 1016.9 1012.6 1007.1 1002.7 1004.9 1011.8 1018.9 1023.2 1023.9 1016.2 MAX. QFF PRESSURE IN HPA 1042.5 1038.9 1027.0 1030.7 1021.0 1012.9 1008.1 1011.6 1019.4 1028.2 1032.7 1037.4 1042.5 DAY 3 6 16 8 5 26 27 21 30 16 22 29 MIN. QFF PRESSURE IN HPA 1016.7 1005.5 1002.8 1008.1 1004.9 1001.0 998.1 998.8 1006.0 1010.8 1010.9 1004.2 998.1 DAY 31 1 4 17 27 30 25 29 8 30 19 26 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 867.2 865.7 861.2 864.1 863.7 860.8 858.8 859.9 ****** 867.2 866.9 865.3 ****** MAX. QFE PRESSURE IN HPA 878.0 875.8 869.4 873.6 869.0 865.0 862.0 864.2 ****** 873.6 873.0 873.4 ****** DAY 9 6 16 8 16 12 30 5 ** 16 5 21 MIN. QFE PRESSURE IN HPA 859.8 852.0 849.0 857.6 859.2 855.0 855.7 856.0 ****** 861.9 857.2 847.0 ****** DAY 28 1 4 30 27 30 8 3 ** 30 19 26 MEAN QNH PRESSURE IN HPA 1024.1 1022.3 1017.2 1020.5 1020.0 1016.6 1014.4 1015.6 ****** 1024.0 1023.7 1021.8 ****** MAX. QNH PRESSURE IN HPA 1036.4 1033.8 1026.5 1031.3 1026.1 1021.5 1018.1 1020.6 ****** 1031.3 1030.6 1031.1 ****** DAY 9 6 16 8 16 12 30 5 ** 16 5 21 MIN. QNH PRESSURE IN HPA 1015.5 1006.6 1003.2 1013.0 1014.9 1010.0 1010.8 1011.2 ****** 1017.9 1012.6 1000.9 ****** DAY 28 1 4 30 27 30 8 3 ** 30 19 26 MEAN QFF PRESSURE IN HPA 1029.7 1026.4 1017.3 1017.4 1013.1 1007.4 1003.3 1005.1 ****** 1018.8 1023.0 1024.0 ****** MAX. QFF PRESSURE IN HPA 1043.0 1040.0 1027.0 1031.5 1021.1 1012.8 1007.8 1012.3 ****** 1029.0 1033.3 1038.4 ****** DAY 2 6 16 8 5 26 27 5 ** 16 22 29 MIN. QFF PRESSURE IN HPA 1016.4 1006.3 1004.4 1008.0 1006.4 1002.0 999.2 999.8 ****** 1013.3 1010.4 1001.9 ****** DAY 31 29 4 30 24 30 15 1 ** 12 19 26 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 867.2 865.5 861.1 864.1 863.9 861.2 859.2 860.3 ****** 867.2 867.0 865.2 ****** MAX. QFE PRESSURE IN HPA 878.0 875.0 869.9 873.4 869.0 865.7 862.6 864.2 ****** 873.6 873.1 872.3 ****** DAY 9 6 16 8 15 12 26 5 ** 16 5 21 MIN. QFE PRESSURE IN HPA 859.4 853.0 850.8 856.0 859.0 856.2 856.5 855.8 ****** 862.2 857.6 846.9 ****** DAY 31 1 8 30 24 30 8 2 ** 29 19 26 MEAN QNH PRESSURE IN HPA 1024.0 1022.1 1017.0 1020.4 1020.3 1017.1 1014.9 1016.1 ****** 1024.0 1023.7 1021.7 ****** MAX. QNH PRESSURE IN HPA 1036.4 1032.9 1027.1 1031.1 1026.1 1022.3 1018.7 1020.6 ****** 1031.3 1030.8 1029.8 ****** DAY 9 6 16 8 15 12 26 5 ** 16 5 21 MIN. QNH PRESSURE IN HPA 1015.1 1007.7 1005.2 1011.2 1014.6 1011.4 1011.8 1011.0 ****** 1018.3 1013.0 1000.8 ****** DAY 31 1 8 30 24 30 8 2 ** 29 19 26 MEAN QFF PRESSURE IN HPA 1029.2 1025.7 1016.7 1016.9 1013.0 1007.7 1003.7 1005.3 ****** 1018.1 1022.5 1023.0 ****** MAX. QFF PRESSURE IN HPA 1042.6 1039.5 1027.0 1031.3 1021.7 1012.6 1009.5 1012.1 ****** 1028.3 1032.7 1036.6 ****** DAY 3 6 16 8 5 26 26 5 ** 16 14 28 MIN. QFF PRESSURE IN HPA 1015.7 1006.2 1005.4 1006.2 1005.1 1003.1 999.3 999.8 ****** 1011.4 1012.1 1002.1 ****** DAY 31 29 2 30 27 30 15 1 ** 29 19 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -6.5 -7.7 6.2 14.6 17.9 23.4 27.1 25.5 20.8 15.7 8.7 3.2 12.4 MINIMUN AIR TEMPERATURE (C) -10.2 -12.4 2.0 7.3 9.7 13.0 17.7 16.0 11.6 9.7 5.1 -0.7 5.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 1 0 0 0 0 3 DAYS WITH MINIMUM TEMP. <=-4 26 26 0 0 0 0 0 0 0 0 1 2 55 DAYS WITH FREEZING MIN.<= 0 31 27 9 0 0 0 0 0 0 0 1 20 88 TEMPERATURE RECORDS LOWEST(C) -18.0 -19.2 -2.8 2.6 4.8 9.8 12.4 12.8 5.2 1.6 -4.4 -7.4 -19.2 DAY 15 16 30 2 12 2 2 30 23 25 22 5 MAXIMUM AIR TEMPERATURE (C) -2.0 -2.2 11.1 21.6 25.0 31.4 34.9 33.7 29.0 22.2 13.4 8.1 18.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 5 20 31 27 13 2 0 0 98 DAYS WITH MAXIMUM TEMP. <= 0 21 22 0 0 0 0 0 0 0 0 0 0 43 TEMPERATURE RECORDS HIGHEST(C) 5.0 9.4 18.4 25.2 31.6 37.4 40.8 37.4 36.8 30.0 18.2 11.6 40.8 DAY 19 28 24 17 26 29 21 14 2 5 28 1 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 10.2 9.1 14.3 15.3 18.4 17.2 17.7 17.4 12.5 8.3 8.8 13.2 MEAN DAILY TEMP. (MDT) (C) -6.1 -7.3 6.6 14.4 17.4 22.2 26.3 24.8 20.3 16.0 9.2 3.7 12.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 4.9 44.8 165.1 119.3 37.0 8.2 0.0 0.0 379.3 HEATING DEG. DAYS(BASE 18 0C) 724.8 708.0 354.9 107.0 50.8 0.0 0.0 0.0 22.4 97.5 262.8 444.1 2772.3 DEWPOINT (MEAN C) -10.1 -11.1 0.1 3.1 3.4 2.3 7.8 5.5 1.7 2.5 2.3 -2.7 0.4 MIXING RATIO (G/KG) 2.15 2.02 4.56 5.66 5.78 5.44 8.10 7.08 5.18 5.48 5.41 3.71 5.05 VAPOUR PRESSURE (HPA) 2.98 2.81 6.28 7.81 7.96 7.47 11.05 9.68 7.13 7.57 7.48 5.14 6.95 SATURATION DEF. (HPA) 0.96 0.93 3.51 9.60 13.81 22.95 26.57 24.75 19.31 11.50 4.07 2.75 11.73 RELATIVE HUMIDITY (MEAN %) 77 79 69 49 42 28 33 32 33 48 67 68 52 RELATIVE HUMIDITY (MAX. %) 87 89 88 70 65 46 52 51 53 67 81 83 69 RELATIVE HUMIDITY (MIN. %) 63 64 49 32 25 15 19 17 19 30 47 50 36 RELATIVE HUMIDITY (MEAN% 03UTC) 82 83 85 69 61 45 50 49 51 62 76 76 66 RELATIVE HUMIDITY (MEAN% 09UTC) 70 70 55 38 31 20 25 25 24 35 54 55 42 RELATIVE HUMIDITY (MEAN% 15UTC) 76 77 58 36 27 17 21 20 23 41 64 63 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 43.5 21.0 84.5 18.5 7.3 0.1 0.0 0.0 2.8 58.6 69.1 24.7 330.1 DAYS WITH PRECIPITATION >=10 1 0 2 1 0 0 0 0 0 2 3 2 11 DAYS WITH PRECIPITATION >= 5 5 2 7 1 1 0 0 0 0 3 3 2 24 DAYS WITH PRECIPITATION >= 1 9 5 11 3 1 0 0 0 1 5 6 3 44 DAYS WITH PRECIPITATION 13 12 15 5 4 1 0 0 1 7 8 4 70 GREATEST DAILY PRECIPITATION 10.0 8.0 22.0 15.0 6.0 0.1 0.0 0.0 2.8 26.0 24.3 10.0 26.0 DAY 11 13 10 10 6 12 ** ** 19 30 11 1 DAY WITH THUNDER STORM 0 0 1 4 2 0 0 0 1 4 1 0 13 DAYS WITH SNOW OR SLEET 13 12 3 0 0 0 0 0 0 0 0 2 30 DAYS WITH DUST 0 0 0 0 2 0 0 0 0 3 0 0 5 WIND DIRECTION (PREVAILING) 45 360 180 180 225 225 45 45 180 225 180 180 225 PREVAILING WIND SPEED(KNOTS) 6.2 8.3 12.1 10.8 12.1 11.9 6.5 8.0 11.2 14.7 12.5 10.7 12.6 PREVAILING WIND PERCENT 5.2 3.1 11.7 10.8 17.3 13.8 13.3 10.5 12.5 25.0 27.1 21.0 11.9 CALMS PERCENT OF WIND 80.6 91.1 70.2 68.3 59.3 62.5 67.3 68.5 62.1 52.8 49.2 57.7 65.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 207 240 198 197 204 214 81 278 203 206 198 197 202 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.2 2.1 1.6 2.6 1.9 0.3 0.2 2.1 4.6 5.5 3.9 2.1 WIND STEADINESES (MEAN %) 30.0 22.2 63.6 53.3 57.8 52.8 10.7 6.7 53.8 79.3 90.2 86.7 58.3 WIND SPEED (MEAN KNOTS) 2.0 0.9 3.3 3.0 4.5 3.6 2.8 3.0 3.9 5.8 6.1 4.5 3.6 FASTEST WIND DIRECTION 220 210 210 240 240 210 210 210 220 210 220 210 210 FASTEST WIND SPEED (KNOTS) 27 16 21 27 23 19 19 23 23 29 27 31 31 DAY 1 27 26 15 27 23 7 1 17 3 18 1 DAYS WITH SKY CLEAR (0-2)/8 17 15 10 17 21 29 29 31 29 24 14 18 254 DAYS WITH P.CLOUDY (3-6)/8 4 8 12 12 10 1 2 0 1 5 10 10 75 DAYS WITH CLOUDY (7-8)/8 10 5 9 1 0 0 0 0 0 2 6 3 36 DAYS WITH VISIBILITY =< 2 KM 5 6 0 0 0 0 0 0 0 0 0 1 12 DURATION OF SUNSHINE HOURS 123.5 126.8 167.9 262.8 338.6 334.0 364.0 341.4 301.3 230.9 171.0 ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.0 869.2 862.9 866.3 865.2 861.7 860.6 861.3 863.9 867.4 867.3 866.0 864.9 MAX. QFE PRESSURE IN HPA 873.2 877.8 869.2 871.2 870.3 866.6 865.8 867.9 872.6 874.2 872.3 872.6 877.8 DAY-HOUR 21-21 8- 6 7- 6 9- 6 14-18 13- 6 9- 6 19- 6 23- 6 27- 6 3- 6 18- 6 MIN. QFE PRESSURE IN HPA 858.7 859.6 850.0 860.9 858.8 856.0 854.0 853.1 857.3 861.2 860.9 860.2 850.0 DAY-HOUR 3- 3 1- 3 29- 6 13-12 6-15 9-15 31-15 1-15 13-12 12-12 19-12 12-21 MEAN QNH PRESSURE IN HPA 1023.7 1026.3 1019.1 1023.0 1021.7 1017.8 1016.5 1017.2 1020.3 1024.2 1024.1 1022.6 1021.4 MAX. QNH PRESSURE IN HPA 1030.9 1036.1 1026.3 1028.6 1027.6 1023.3 1022.4 1024.8 1030.2 1032.0 1029.8 1030.2 1036.1 DAY-HOUR 21-21 8- 6 7- 6 9- 6 14-18 13- 6 9- 6 19- 6 23- 6 27- 6 3- 6 18- 6 MIN. QNH PRESSURE IN HPA 1014.3 1015.3 1004.3 1016.8 1014.4 1011.2 1008.9 1007.9 1012.7 1017.1 1016.8 1016.0 1004.3 DAY-HOUR 3- 3 1- 3 29- 6 13-12 6-15 9-15 31-15 1-15 13-12 12-12 19-12 12-21 MEAN QFF PRESSURE IN HPA 1031.9 1035.5 1018.9 1018.0 1014.7 1007.8 1004.3 1006.0 1011.7 1018.6 1022.4 1024.4 1017.8 MAX. QFF PRESSURE IN HPA 1041.4 1049.1 1027.5 1026.5 1022.2 1015.2 1011.0 1015.5 1026.2 1030.4 1033.7 1033.2 1049.1 DAY-HOUR 15- 9 8- 6 11-18 2- 3 14- 3 13- 3 10- 6 19- 6 23- 3 24- 6 22- 6 18- 6 MIN. QFF PRESSURE IN HPA 1018.4 1022.9 1004.5 1010.3 1005.1 1000.0 996.5 994.8 1002.7 1008.0 1015.0 1014.8 994.8 DAY-HOUR 2-12 23- 3 29- 3 15- 9 30-21 8-21 31-21 1-12 13-12 7- 0 15-12 12-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 867.0 868.9 862.7 866.4 865.3 861.9 860.8 861.4 864.1 867.4 867.3 866.0 864.9 MAX. QFE PRESSURE IN HPA 872.4 876.2 867.7 870.8 868.9 865.3 864.3 866.6 871.3 873.0 871.6 871.1 876.2 DAY 22 4 6 10 14 13 10 19 23 27 3 19 MIN. QFE PRESSURE IN HPA 859.3 860.3 851.0 862.0 859.0 856.7 856.4 855.1 858.3 861.7 861.7 860.6 851.0 DAY 3 23 29 14 7 9 6 1 13 2 15 13 MEAN QNH PRESSURE IN HPA 1023.7 1026.0 1018.9 1023.1 1021.9 1018.0 1016.7 1017.4 1020.4 1024.2 1024.1 1022.6 1021.4 MAX. QNH PRESSURE IN HPA 1030.0 1034.3 1024.6 1028.1 1025.9 1021.8 1020.7 1023.3 1028.7 1030.6 1029.0 1028.5 1034.3 DAY 22 4 6 10 14 13 10 19 23 27 3 19 MIN. QNH PRESSURE IN HPA 1015.0 1016.1 1005.5 1018.1 1014.6 1012.0 1011.6 1010.2 1013.8 1017.7 1017.7 1016.5 1005.5 DAY 3 23 29 14 7 9 6 1 13 2 15 13 MEAN QFF PRESSURE IN HPA 1031.3 1034.9 1018.2 1017.9 1014.9 1008.2 1004.5 1005.9 1011.5 1018.0 1022.0 1023.9 1017.6 MAX. QFF PRESSURE IN HPA 1040.2 1046.2 1026.2 1024.2 1020.9 1013.7 1008.9 1013.5 1024.6 1028.6 1031.8 1030.2 1046.2 DAY 31 4 12 2 14 13 9 19 23 24 22 18 MIN. QFF PRESSURE IN HPA 1018.9 1023.9 1004.8 1011.1 1007.1 1001.3 998.6 996.7 1003.6 1008.0 1015.7 1016.1 996.7 DAY 3 23 29 18 31 9 6 1 13 7 15 13 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.7 869.0 862.9 866.9 865.8 862.6 861.7 862.2 864.6 867.6 867.3 866.0 865.3 MAX. QFE PRESSURE IN HPA 871.8 876.6 868.0 870.9 869.6 866.3 865.2 867.4 871.7 873.3 871.6 871.7 876.6 DAY 22 8 7 9 14 13 9 19 22 27 3 18 MIN. QFE PRESSURE IN HPA 858.7 859.6 850.4 862.4 859.0 857.6 857.2 855.3 859.0 862.1 861.7 860.8 850.4 DAY 3 1 29 13 7 9 6 1 13 2 15 13 MEAN QNH PRESSURE IN HPA 1023.4 1026.1 1019.1 1023.6 1022.4 1018.8 1017.7 1018.2 1021.0 1024.4 1024.1 1022.6 1021.8 MAX. QNH PRESSURE IN HPA 1029.3 1034.8 1024.9 1028.2 1026.7 1023.0 1021.7 1024.2 1029.2 1031.0 1029.0 1029.2 1034.8 DAY 22 8 7 9 14 13 9 19 22 27 3 18 MIN. QNH PRESSURE IN HPA 1014.3 1015.3 1004.8 1018.5 1014.6 1013.0 1012.6 1010.4 1014.6 1018.2 1017.7 1016.7 1004.8 DAY 3 1 29 13 7 9 6 1 13 2 15 13 MEAN QFF PRESSURE IN HPA 1032.0 1036.0 1019.2 1019.4 1015.9 1009.5 1006.0 1007.7 1013.4 1019.5 1023.0 1024.9 1018.9 MAX. QFF PRESSURE IN HPA 1041.0 1047.4 1027.2 1026.5 1022.2 1015.2 1010.8 1015.4 1026.2 1029.4 1033.2 1032.8 1047.4 DAY 31 4 12 2 14 13 9 19 23 24 22 18 MIN. QFF PRESSURE IN HPA 1019.1 1022.9 1004.5 1013.2 1008.1 1003.1 1000.1 997.9 1006.1 1010.1 1015.6 1016.6 997.9 DAY 3 23 29 13 27 9 6 1 13 2 15 13 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.6 869.9 863.7 867.4 866.0 862.8 862.1 862.6 865.2 868.3 868.3 866.8 865.9 MAX. QFE PRESSURE IN HPA 872.9 877.8 869.2 871.2 869.9 866.6 865.8 867.9 872.6 874.2 872.3 872.6 877.8 DAY 30 8 7 9 14 13 9 19 23 27 3 18 MIN. QFE PRESSURE IN HPA 860.9 861.1 850.0 862.4 859.8 857.2 857.5 855.0 859.9 863.0 863.2 862.7 850.0 DAY 3 23 29 13 7 9 5 1 13 2 19 12 MEAN QNH PRESSURE IN HPA 1024.5 1027.1 1020.0 1024.2 1022.7 1019.0 1018.2 1018.7 1021.7 1025.3 1025.2 1023.6 1022.5 MAX. QNH PRESSURE IN HPA 1030.5 1036.1 1026.3 1028.6 1027.1 1023.3 1022.4 1024.8 1030.2 1032.0 1029.8 1030.2 1036.1 DAY 30 8 7 9 14 13 9 19 23 27 3 18 MIN. QNH PRESSURE IN HPA 1016.8 1017.0 1004.3 1018.5 1015.5 1012.6 1012.9 1010.0 1015.6 1019.2 1019.4 1018.9 1004.3 DAY 3 23 29 13 7 9 5 1 13 2 19 12 MEAN QFF PRESSURE IN HPA 1033.1 1036.8 1020.0 1019.3 1015.5 1008.7 1005.9 1007.2 1013.0 1019.7 1023.9 1025.9 1019.1 MAX. QFF PRESSURE IN HPA 1041.4 1049.1 1027.5 1025.7 1021.0 1014.4 1011.0 1015.5 1025.9 1030.4 1033.7 1033.2 1049.1 DAY 15 8 12 2 14 13 10 19 22 24 22 18 MIN. QFF PRESSURE IN HPA 1022.0 1024.7 1005.1 1012.6 1008.7 1001.4 1000.2 996.6 1005.5 1010.5 1016.4 1017.2 996.6 DAY 3 23 29 29 31 9 5 1 13 7 30 1 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 867.5 869.8 863.4 866.6 865.5 862.0 861.2 861.6 864.1 867.4 867.5 866.1 865.2 MAX. QFE PRESSURE IN HPA 872.6 877.0 868.6 870.5 869.6 865.4 864.8 866.2 871.7 872.4 871.7 872.4 877.0 DAY 22 8 6 9 20 13 9 19 22 22 3 18 MIN. QFE PRESSURE IN HPA 861.4 861.7 850.6 861.3 860.3 856.5 856.0 854.1 858.4 862.3 862.4 861.1 850.6 DAY 2 23 29 13 7 9 5 1 13 30 18 12 MEAN QNH PRESSURE IN HPA 1024.3 1027.0 1019.7 1023.4 1022.0 1018.0 1017.1 1017.6 1020.4 1024.2 1024.3 1022.7 1021.7 MAX. QNH PRESSURE IN HPA 1030.2 1035.2 1025.6 1027.8 1026.7 1021.9 1021.3 1022.9 1029.2 1030.0 1029.2 1030.0 1035.2 DAY 22 8 6 9 20 13 9 19 22 22 3 18 MIN. QNH PRESSURE IN HPA 1017.4 1017.7 1005.0 1017.3 1016.1 1011.8 1011.2 1009.0 1013.9 1018.4 1018.5 1017.0 1005.0 DAY 2 23 29 13 7 9 5 1 13 30 18 12 MEAN QFF PRESSURE IN HPA 1032.0 1035.7 1019.2 1017.6 1014.8 1007.6 1004.6 1005.8 1011.4 1018.0 1022.2 1024.1 1017.7 MAX. QFF PRESSURE IN HPA 1041.4 1046.8 1027.2 1023.6 1020.7 1012.5 1010.5 1013.1 1024.5 1028.4 1030.4 1031.9 1046.8 DAY 15 8 12 2 20 4 10 19 22 24 22 18 MIN. QFF PRESSURE IN HPA 1021.9 1024.7 1005.7 1010.3 1007.7 1000.5 998.4 994.8 1003.8 1010.2 1015.6 1015.5 994.8 DAY 2 23 29 15 31 9 5 1 13 2 30 12 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 866.3 868.5 862.2 865.3 864.2 860.8 859.7 860.1 862.7 866.3 866.5 865.1 864.0 MAX. QFE PRESSURE IN HPA 871.3 875.2 867.5 869.6 867.8 864.6 863.5 864.9 870.4 871.1 870.7 871.2 875.2 DAY 30 8 12 9 20 3 10 19 22 22 3 18 MIN. QFE PRESSURE IN HPA 859.0 860.8 852.0 860.9 859.0 856.1 855.0 853.3 857.3 861.2 860.9 860.4 852.0 DAY 2 1 29 13 6 9 5 1 13 12 19 12 MEAN QNH PRESSURE IN HPA 1022.9 1025.5 1018.3 1021.8 1020.5 1016.7 1015.4 1015.9 1018.9 1023.0 1023.2 1021.7 1020.3 MAX. QNH PRESSURE IN HPA 1028.7 1033.2 1024.3 1026.7 1024.7 1021.0 1019.8 1021.4 1027.7 1028.5 1028.0 1028.6 1033.2 DAY 30 8 12 9 20 3 10 19 22 22 3 18 MIN. QNH PRESSURE IN HPA 1014.6 1016.7 1006.6 1016.8 1014.6 1011.3 1010.0 1008.1 1012.7 1017.1 1016.8 1016.2 1006.6 DAY 2 1 29 13 6 9 5 1 13 12 19 12 MEAN QFF PRESSURE IN HPA 1030.4 1034.2 1017.6 1016.4 1013.5 1006.7 1003.2 1004.5 1010.0 1016.9 1021.1 1022.9 1016.5 MAX. QFF PRESSURE IN HPA 1038.6 1043.7 1025.0 1021.9 1020.0 1012.7 1008.6 1011.6 1022.5 1026.5 1028.9 1030.0 1043.7 DAY 15 5 12 1 13 3 10 19 22 24 22 18 MIN. QFF PRESSURE IN HPA 1018.4 1024.4 1006.1 1010.9 1006.9 1001.2 997.9 994.8 1002.7 1008.9 1015.0 1015.5 994.8 DAY 2 13 28 13 6 30 5 1 13 2 15 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.6 868.8 862.2 865.3 863.9 860.5 859.0 859.7 862.8 866.9 866.9 865.8 864.0 MAX. QFE PRESSURE IN HPA 872.2 875.4 867.4 869.2 868.0 864.3 863.0 864.3 870.5 871.8 870.8 871.9 875.4 DAY 30 8 6 9 14 3 9 19 22 27 3 18 MIN. QFE PRESSURE IN HPA 858.8 861.7 852.9 861.2 858.8 856.0 854.0 853.1 857.7 861.4 860.9 861.0 852.9 DAY 2 1 28 13 6 9 31 1 13 2 19 12 MEAN QNH PRESSURE IN HPA 1023.3 1025.8 1018.3 1021.9 1020.3 1016.3 1014.6 1015.5 1018.9 1023.7 1023.6 1022.4 1020.4 MAX. QNH PRESSURE IN HPA 1029.7 1033.4 1024.2 1026.3 1024.9 1020.7 1019.2 1020.7 1027.8 1029.3 1028.1 1029.4 1033.4 DAY 30 8 6 9 14 3 9 19 22 27 3 18 MIN. QNH PRESSURE IN HPA 1014.4 1017.7 1007.6 1017.1 1014.4 1011.2 1008.9 1007.9 1013.1 1017.4 1016.8 1016.9 1007.6 DAY 2 1 28 13 6 9 31 1 13 2 19 12 MEAN QFF PRESSURE IN HPA 1031.9 1035.5 1018.5 1017.4 1013.8 1006.9 1002.9 1005.0 1011.4 1018.9 1022.4 1024.6 1017.4 MAX. QFF PRESSURE IN HPA 1038.9 1045.6 1026.6 1022.7 1020.0 1012.1 1008.2 1011.6 1024.1 1027.5 1030.4 1032.4 1045.6 DAY 15 5 11 1 14 3 9 19 22 24 21 18 MIN. QFF PRESSURE IN HPA 1018.9 1025.3 1006.4 1012.3 1006.5 1001.7 997.4 996.0 1004.7 1009.4 1016.1 1016.0 996.0 DAY 2 13 28 12 30 30 5 1 8 2 19 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 867.2 869.3 863.2 866.5 865.2 861.6 860.0 861.3 864.0 867.8 867.4 866.2 865.0 MAX. QFE PRESSURE IN HPA 872.9 876.2 868.0 870.7 870.3 865.2 864.1 865.4 871.1 872.5 871.8 872.1 876.2 DAY 30 3 6 8 14 3 9 18 22 27 21 18 MIN. QFE PRESSURE IN HPA 859.5 861.9 853.6 862.4 860.1 856.7 854.9 854.5 859.2 863.0 861.9 861.2 853.6 DAY 2 22 28 13 6 8 31 1 13 6 19 31 MEAN QNH PRESSURE IN HPA 1024.0 1026.4 1019.4 1023.2 1021.8 1017.6 1015.7 1017.2 1020.3 1024.7 1024.2 1022.9 1021.4 MAX. QNH PRESSURE IN HPA 1030.5 1034.3 1024.9 1028.0 1027.6 1021.7 1020.5 1021.9 1028.5 1030.1 1029.3 1029.6 1034.3 DAY 30 3 6 8 14 3 9 18 22 27 21 18 MIN. QNH PRESSURE IN HPA 1015.2 1017.9 1008.4 1018.5 1015.9 1012.0 1009.9 1009.5 1014.9 1019.2 1017.9 1017.1 1008.4 DAY 2 22 28 13 6 8 31 1 13 6 19 31 MEAN QFF PRESSURE IN HPA 1032.6 1035.9 1019.5 1018.3 1014.6 1007.3 1003.4 1005.8 1011.7 1019.2 1022.9 1025.2 1018.0 MAX. QFF PRESSURE IN HPA 1040.6 1047.2 1027.5 1024.0 1021.3 1012.6 1008.5 1012.8 1024.1 1027.9 1032.3 1032.7 1047.2 DAY 30 5 11 1 14 12 9 19 22 24 21 18 MIN. QFF PRESSURE IN HPA 1019.6 1025.5 1008.1 1012.9 1005.3 1001.0 997.3 997.0 1005.3 1009.8 1016.6 1016.6 997.0 DAY 2 22 28 12 30 8 31 1 13 6 19 12 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 867.2 869.4 863.1 866.5 865.4 861.8 860.5 861.6 864.1 867.7 867.3 866.1 865.1 MAX. QFE PRESSURE IN HPA 873.2 876.2 868.0 870.7 869.1 865.4 864.3 866.2 871.3 873.1 871.8 871.9 876.2 DAY 21 3 6 8 14 3 9 18 22 26 21 18 MIN. QFE PRESSURE IN HPA 859.8 861.5 853.3 862.0 860.1 856.7 855.1 855.5 858.5 862.6 862.2 860.2 853.3 DAY 2 22 28 13 6 8 31 1 12 2 19 12 MEAN QNH PRESSURE IN HPA 1024.0 1026.5 1019.3 1023.2 1022.0 1017.9 1016.3 1017.6 1020.5 1024.6 1024.1 1022.8 1021.6 MAX. QNH PRESSURE IN HPA 1030.9 1034.3 1024.9 1028.0 1026.2 1021.9 1020.7 1022.9 1028.7 1030.8 1029.3 1029.4 1034.3 DAY 21 3 6 8 14 3 9 18 22 26 21 18 MIN. QNH PRESSURE IN HPA 1015.5 1017.5 1008.1 1018.1 1015.9 1012.0 1010.2 1010.6 1014.0 1018.7 1018.3 1016.0 1008.1 DAY 2 22 28 13 6 8 31 1 12 2 19 12 MEAN QFF PRESSURE IN HPA 1031.8 1035.0 1018.8 1017.5 1014.7 1007.5 1003.8 1006.0 1011.5 1018.4 1022.0 1024.1 1017.6 MAX. QFF PRESSURE IN HPA 1039.9 1045.8 1026.4 1024.4 1020.5 1013.0 1009.1 1012.7 1023.9 1027.8 1031.4 1031.2 1045.8 DAY 30 8 11 1 13 12 9 18 22 23 21 18 MIN. QFF PRESSURE IN HPA 1019.8 1024.3 1007.2 1010.7 1005.1 1000.0 996.5 998.1 1003.8 1008.7 1016.6 1014.8 996.5 DAY 2 28 28 17 30 8 31 1 12 6 19 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.0 0.2 5.1 10.6 16.4 22.8 25.7 24.0 21.4 14.2 9.5 2.3 12.5 MINIMUN AIR TEMPERATURE (C) -4.9 -2.4 0.2 4.9 8.7 13.4 17.2 14.9 11.3 7.4 3.1 -2.6 5.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 3 0 0 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 20 9 5 0 0 0 0 0 0 0 0 10 44 DAYS WITH FREEZING MIN.<= 0 27 22 14 1 0 0 0 0 0 0 12 19 95 TEMPERATURE RECORDS LOWEST(C) -13.0 -9.4 -8.2 -1.0 1.6 9.0 12.4 12.2 6.8 1.4 -3.2 -17.8 -17.8 DAY 26 1 17 4 3 28 8 25 18 16 14 28 MAXIMUM AIR TEMPERATURE (C) 2.0 3.6 11.1 16.7 23.3 30.2 33.0 32.1 30.5 21.3 17.1 7.8 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 15 23 22 19 0 0 0 79 DAYS WITH MAXIMUM TEMP. <= 0 11 7 1 0 0 0 0 0 0 0 0 7 26 TEMPERATURE RECORDS HIGHEST(C) 8.0 10.8 18.0 26.8 29.6 34.2 39.4 37.4 33.0 27.2 25.4 17.6 39.4 DAY 4 27 23 27 31 12 18 6 5 11 3 4 DIF. BETWEEN (MAX.-MIN.) (C) 6.9 6.0 10.9 11.8 14.6 16.8 15.8 17.2 19.2 13.9 14.0 10.4 13.2 MEAN DAILY TEMP. (MDT) (C) -1.5 0.6 5.7 10.8 16.0 21.8 25.1 23.5 20.9 14.4 10.1 2.6 12.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 2.2 34.7 129.0 77.9 17.9 0.0 0.0 0.0 261.7 HEATING DEG. DAYS(BASE 18 0C) 603.8 486.6 382.6 218.2 76.9 0.0 0.0 0.0 0.1 113.4 237.3 478.1 2597.0 DEWPOINT (MEAN C) -6.4 -4.7 -2.0 1.5 3.2 3.9 8.3 6.9 0.3 2.5 -1.0 -3.6 0.7 MIXING RATIO (G/KG) 2.89 3.21 3.98 5.05 5.92 6.11 8.31 7.61 4.71 5.46 4.20 3.66 5.09 VAPOUR PRESSURE (HPA) 4.00 4.43 5.50 6.94 8.14 8.38 11.33 10.41 6.49 7.55 5.82 5.07 7.00 SATURATION DEF. (HPA) 1.48 1.94 3.77 6.60 11.60 20.70 23.20 20.91 20.64 9.47 6.87 3.10 10.86 RELATIVE HUMIDITY (MEAN %) 74 72 63 57 46 33 36 37 28 50 52 68 51 RELATIVE HUMIDITY (MAX. %) 88 85 83 79 69 54 54 56 45 71 73 84 70 RELATIVE HUMIDITY (MIN. %) 57 58 43 37 28 18 22 22 14 31 30 49 34 RELATIVE HUMIDITY (MEAN% 03UTC) 82 82 78 74 65 52 53 55 44 68 70 77 67 RELATIVE HUMIDITY (MEAN% 09UTC) 64 65 51 44 35 24 28 30 20 38 36 59 41 RELATIVE HUMIDITY (MEAN% 15UTC) 72 66 53 44 32 20 25 24 18 43 46 65 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 44.5 34.0 63.7 91.4 11.4 0.0 0.1 0.0 0.0 19.6 20.3 27.6 312.6 DAYS WITH PRECIPITATION >=10 0 2 2 4 0 0 0 0 0 0 1 1 10 DAYS WITH PRECIPITATION >= 5 5 2 5 4 1 0 0 0 0 2 1 2 22 DAYS WITH PRECIPITATION >= 1 10 8 9 8 3 0 0 0 0 4 3 4 49 DAYS WITH PRECIPITATION 17 16 16 10 3 0 1 0 0 7 3 7 80 GREATEST DAILY PRECIPITATION 8.9 10.0 16.9 33.0 5.0 0.0 0.1 0.0 0.0 8.0 17.0 17.0 33.0 DAY 24 2 7 2 14 ** 18 ** ** 15 10 24 DAY WITH THUNDER STORM 0 0 2 1 1 0 0 0 0 2 0 0 6 DAYS WITH SNOW OR SLEET 14 14 4 2 0 0 0 0 0 0 0 2 36 DAYS WITH DUST 0 0 0 0 0 1 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 180 180 225 225 225 225 45 45 225 225 225 180 225 PREVAILING WIND SPEED(KNOTS) 8.9 11.8 11.1 12.5 14.1 12.4 8.1 8.1 12.0 8.3 11.3 10.6 11.6 PREVAILING WIND PERCENT 10.2 17.4 10.5 24.2 17.7 21.3 22.2 19.8 11.3 12.5 13.3 15.7 12.9 CALMS PERCENT OF WIND 72.1 62.5 65.3 53.8 54.8 53.3 52.8 57.3 68.8 65.7 70.4 69.8 62.2 NO. OF WIND OBSERVATION 244 224 248 240 248 240 248 248 240 248 240 248 2916 VECTOR WIND DIRECTION (MEAN) 205 199 235 213 207 213 12 18 209 206 202 200 209 VECTOR WIND MAGNITUDE(KNOTS) 1.4 2.8 0.5 4.1 2.6 2.6 2.1 1.3 1.1 1.2 2.4 2.6 1.5 WIND STEADINESES (MEAN %) 60.9 70.0 14.7 80.4 55.3 51.0 51.2 36.1 36.7 44.4 80.0 86.7 40.5 WIND SPEED (MEAN KNOTS) 2.3 4.0 3.4 5.1 4.7 5.1 4.1 3.6 3.0 2.7 3.0 3.0 3.7 FASTEST WIND DIRECTION 200 200 210 220 210 210 360 210 220 200 200 200 210 FASTEST WIND SPEED (KNOTS) 19 19 17 23 41 23 17 19 23 23 23 23 41 DAY 6 16 8 12 2 16 12 4 20 24 9 14 DAYS WITH SKY CLEAR (0-2)/8 8 7 13 12 22 30 29 31 30 21 19 13 235 DAYS WITH P.CLOUDY (3-6)/8 11 7 12 13 8 0 2 0 0 9 10 9 81 DAYS WITH CLOUDY (7-8)/8 12 14 6 5 1 0 0 0 0 1 1 9 49 DAYS WITH VISIBILITY =< 2 KM 4 3 0 1 0 0 0 0 0 1 0 4 13 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** 378.4 363.4 350.7 197.1 100.7 190.7 119.7 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.6 863.8 867.4 862.9 863.7 861.4 860.3 861.6 863.6 868.2 868.8 867.8 864.7 MAX. QFE PRESSURE IN HPA 876.6 873.3 877.5 870.1 870.4 866.7 865.2 867.4 869.4 877.3 877.9 878.5 878.5 DAY-HOUR 26- 6 8- 6 9- 9 24- 6 16- 6 8- 6 8- 6 29- 6 23- 6 15- 9 23- 6 28- 6 MIN. QFE PRESSURE IN HPA 856.1 850.4 858.7 850.1 854.8 854.2 855.8 856.7 858.4 861.7 860.0 856.0 850.1 DAY-HOUR 4-12 19- 0 31-21 2- 0 12-15 26-15 29-12 7-12 4-12 25-18 9-12 24-15 MEAN QNH PRESSURE IN HPA 1023.4 1020.1 1024.2 1019.1 1020.0 1017.4 1016.2 1017.6 1019.8 1025.2 1025.9 1024.6 1021.1 MAX. QNH PRESSURE IN HPA 1034.8 1031.0 1035.8 1027.3 1027.7 1023.4 1021.7 1024.2 1026.5 1035.6 1036.2 1036.9 1036.9 DAY-HOUR 26- 6 8- 6 9- 9 24- 6 16- 6 8- 6 8- 6 29- 6 23- 6 15- 9 23- 6 28- 6 MIN. QNH PRESSURE IN HPA 1011.3 1004.8 1014.3 1004.4 1009.8 1009.1 1011.0 1012.0 1013.9 1017.7 1015.8 1011.2 1004.4 DAY-HOUR 4-12 19- 0 31-21 2- 0 12-15 26-15 29-12 7-12 4-12 25-18 9-12 24-15 MEAN QFF PRESSURE IN HPA 1028.4 1023.8 1024.9 1016.3 1013.8 1007.6 1004.7 1007.1 1011.0 1020.4 1023.9 1027.1 1017.4 MAX. QFF PRESSURE IN HPA 1044.7 1035.9 1041.7 1025.3 1023.0 1015.0 1012.1 1015.5 1019.5 1036.3 1037.2 1050.4 1050.4 DAY-HOUR 26- 6 8- 6 17- 3 3-21 16- 3 8- 3 8- 3 29- 6 23- 3 16- 3 14- 6 28-18 MIN. QFF PRESSURE IN HPA 1011.7 1004.0 1010.8 1002.4 1003.2 997.2 998.6 1000.2 1003.7 1009.7 1010.6 1014.8 997.2 DAY-HOUR 4-12 19- 0 31-21 2- 0 2- 0 27- 0 29-12 6-12 4-12 1- 0 9-12 24-15 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 866.5 863.8 867.2 862.7 863.7 861.6 860.5 861.8 863.7 868.2 868.8 867.7 864.7 MAX. QFE PRESSURE IN HPA 875.0 872.3 876.0 869.3 869.4 865.6 864.0 865.8 867.8 876.7 876.8 877.6 877.6 DAY 26 8 10 25 16 8 9 29 24 16 23 28 MIN. QFE PRESSURE IN HPA 857.2 850.4 860.4 850.1 856.1 854.5 856.9 857.7 859.5 862.6 862.2 856.8 850.1 DAY 23 19 5 2 2 27 29 7 5 1 9 25 MEAN QNH PRESSURE IN HPA 1023.3 1020.1 1024.0 1018.9 1020.0 1017.6 1016.3 1017.8 1020.0 1025.1 1025.8 1024.6 1021.1 MAX. QNH PRESSURE IN HPA 1032.9 1029.8 1034.1 1026.4 1026.5 1022.2 1020.3 1022.4 1024.7 1034.9 1035.0 1035.9 1035.9 DAY 26 8 10 25 16 8 9 29 24 16 23 28 MIN. QNH PRESSURE IN HPA 1012.6 1004.8 1016.2 1004.4 1011.3 1009.5 1012.2 1013.1 1015.2 1018.7 1018.3 1012.1 1004.4 DAY 23 19 5 2 2 27 29 7 5 1 9 25 MEAN QFF PRESSURE IN HPA 1027.8 1023.5 1024.4 1015.8 1013.8 1007.9 1004.8 1007.3 1010.8 1019.9 1023.1 1026.4 1017.1 MAX. QFF PRESSURE IN HPA 1041.6 1034.5 1041.5 1024.0 1021.5 1014.2 1010.4 1013.0 1017.2 1036.0 1035.4 1047.4 1047.4 DAY 26 8 17 4 16 8 8 2 23 16 14 29 MIN. QFF PRESSURE IN HPA 1014.9 1004.0 1012.9 1002.4 1003.2 997.2 999.6 1000.9 1004.7 1009.7 1011.9 1016.2 997.2 DAY 4 19 5 2 2 27 28 7 5 1 9 25 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.5 863.7 867.4 862.9 864.2 862.2 861.4 862.6 864.3 868.6 869.0 867.7 865.0 MAX. QFE PRESSURE IN HPA 875.1 872.3 875.4 869.6 869.6 866.4 865.0 867.0 868.9 876.7 876.8 877.8 877.8 DAY 26 8 17 25 16 8 9 29 23 16 23 28 MIN. QFE PRESSURE IN HPA 857.7 851.4 861.4 852.8 855.8 854.5 857.5 858.8 860.1 862.7 861.7 857.6 851.4 DAY 23 19 5 2 2 27 29 7 5 14 9 25 MEAN QNH PRESSURE IN HPA 1023.2 1020.0 1024.2 1019.1 1020.6 1018.3 1017.3 1018.7 1020.7 1025.6 1026.0 1024.6 1021.5 MAX. QNH PRESSURE IN HPA 1033.0 1029.8 1033.4 1026.7 1026.7 1023.1 1021.5 1023.8 1025.9 1034.9 1035.0 1036.1 1036.1 DAY 26 8 17 25 16 8 9 29 23 16 23 28 MIN. QNH PRESSURE IN HPA 1013.1 1005.9 1017.4 1007.5 1011.0 1009.5 1012.9 1014.4 1015.9 1018.9 1017.7 1013.0 1005.9 DAY 23 19 5 2 2 27 29 7 5 14 9 25 MEAN QFF PRESSURE IN HPA 1028.6 1024.0 1025.4 1016.7 1014.9 1008.9 1006.3 1008.9 1012.7 1021.6 1025.0 1027.5 1018.4 MAX. QFF PRESSURE IN HPA 1042.7 1035.0 1041.7 1025.1 1023.0 1015.0 1012.1 1014.6 1019.5 1036.3 1036.8 1049.9 1049.9 DAY 26 8 17 23 16 8 8 29 23 16 14 28 MIN. QFF PRESSURE IN HPA 1014.8 1006.7 1015.3 1006.7 1003.4 997.4 1001.7 1004.0 1006.6 1011.4 1012.1 1017.4 997.4 DAY 4 19 5 2 2 27 29 7 1 1 9 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.3 864.6 868.2 863.4 864.6 862.4 861.6 863.0 864.9 869.4 870.0 868.6 865.7 MAX. QFE PRESSURE IN HPA 876.6 873.3 876.8 870.1 870.4 866.7 865.2 867.4 869.4 877.1 877.9 878.5 878.5 DAY 26 8 9 24 16 8 8 29 23 16 23 28 MIN. QFE PRESSURE IN HPA 858.1 853.0 862.3 855.2 855.8 855.1 858.2 859.2 860.5 863.0 862.1 860.2 853.0 DAY 4 19 11 1 2 27 29 7 5 14 9 25 MEAN QNH PRESSURE IN HPA 1024.1 1021.1 1025.1 1019.7 1021.0 1018.5 1017.6 1019.2 1021.4 1026.6 1027.2 1025.6 1022.3 MAX. QNH PRESSURE IN HPA 1034.8 1031.0 1035.0 1027.3 1027.7 1023.4 1021.7 1024.2 1026.5 1035.3 1036.2 1036.9 1036.9 DAY 26 8 9 24 16 8 8 29 23 16 23 28 MIN. QNH PRESSURE IN HPA 1013.6 1007.7 1018.4 1010.3 1011.0 1010.2 1013.7 1014.9 1016.3 1019.2 1018.2 1016.0 1007.7 DAY 4 19 11 1 2 27 29 7 5 14 9 25 MEAN QFF PRESSURE IN HPA 1029.4 1025.0 1026.0 1016.8 1014.8 1008.5 1006.1 1008.5 1012.5 1021.9 1025.6 1028.4 1018.6 MAX. QFF PRESSURE IN HPA 1044.7 1035.9 1041.3 1024.1 1022.5 1014.4 1011.7 1015.5 1019.4 1035.1 1037.2 1050.2 1050.2 DAY 26 8 17 23 16 7 8 29 23 16 14 28 MIN. QFF PRESSURE IN HPA 1014.6 1008.7 1016.0 1006.8 1003.9 998.0 1001.3 1002.7 1005.8 1011.5 1012.1 1020.2 998.0 DAY 4 19 24 1 2 27 27 7 5 1 9 9 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 866.9 864.2 867.8 863.1 864.0 861.6 860.8 862.0 863.9 868.6 869.1 868.0 865.0 MAX. QFE PRESSURE IN HPA 876.1 872.9 877.5 869.5 869.2 866.3 864.3 866.7 868.5 877.3 876.5 877.6 877.6 DAY 26 8 9 24 16 8 9 29 23 15 23 28 MIN. QFE PRESSURE IN HPA 857.4 852.3 861.5 854.3 856.3 855.4 857.1 857.6 859.7 862.6 861.2 860.7 852.3 DAY 4 15 24 1 12 26 27 7 5 14 9 24 MEAN QNH PRESSURE IN HPA 1023.7 1020.6 1024.7 1019.3 1020.3 1017.6 1016.7 1018.0 1020.2 1025.6 1026.1 1025.0 1021.5 MAX. QNH PRESSURE IN HPA 1034.2 1030.5 1035.8 1026.6 1026.3 1023.0 1020.7 1023.4 1025.5 1035.6 1034.6 1035.9 1035.9 DAY 26 8 9 24 16 8 9 29 23 15 23 28 MIN. QNH PRESSURE IN HPA 1012.8 1007.0 1017.5 1009.2 1011.5 1010.5 1012.4 1013.0 1015.4 1018.7 1017.1 1016.6 1007.0 DAY 4 15 24 1 12 26 27 7 5 14 9 24 MEAN QFF PRESSURE IN HPA 1028.4 1023.9 1025.0 1016.3 1013.9 1007.6 1004.9 1007.1 1010.8 1020.2 1023.4 1026.9 1017.4 MAX. QFF PRESSURE IN HPA 1042.9 1035.2 1039.1 1024.8 1020.9 1014.4 1010.6 1014.1 1017.6 1035.3 1034.0 1047.8 1047.8 DAY 26 8 17 4 16 7 8 29 23 15 14 28 MIN. QFF PRESSURE IN HPA 1013.2 1007.7 1014.7 1006.8 1005.1 999.2 999.4 1000.6 1004.1 1010.3 1011.1 1017.8 999.2 DAY 4 15 24 1 2 27 22 7 5 1 9 17 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 865.8 863.0 866.5 862.3 862.8 860.5 859.4 860.4 862.3 867.2 867.7 866.8 863.7 MAX. QFE PRESSURE IN HPA 874.6 871.0 876.3 868.1 867.7 865.5 863.0 864.6 867.0 876.8 875.0 877.1 877.1 DAY 26 8 9 24 16 4 8 29 23 15 22 28 MIN. QFE PRESSURE IN HPA 856.1 851.0 860.2 853.4 854.9 854.7 855.8 856.7 858.4 862.3 860.0 856.8 851.0 DAY 4 15 24 1 12 26 29 7 4 14 9 24 MEAN QNH PRESSURE IN HPA 1022.4 1019.2 1023.2 1018.4 1019.0 1016.4 1015.1 1016.2 1018.4 1024.0 1024.6 1023.5 1020.0 MAX. QNH PRESSURE IN HPA 1032.5 1028.4 1034.4 1025.0 1024.6 1022.1 1019.2 1021.0 1023.8 1035.0 1032.9 1035.3 1035.3 DAY 26 8 9 24 16 4 8 29 23 15 22 28 MIN. QNH PRESSURE IN HPA 1011.3 1005.5 1016.0 1008.2 1009.9 1009.7 1011.0 1012.0 1013.9 1018.4 1015.8 1012.1 1005.5 DAY 4 15 24 1 12 26 29 7 4 14 9 24 MEAN QFF PRESSURE IN HPA 1027.0 1022.5 1023.5 1015.4 1012.7 1006.7 1003.6 1005.6 1009.2 1018.8 1021.9 1025.4 1016.0 MAX. QFF PRESSURE IN HPA 1040.9 1033.1 1038.1 1023.1 1019.7 1013.6 1009.4 1011.5 1016.6 1035.5 1031.6 1047.1 1047.1 DAY 26 8 17 4 16 7 8 29 23 15 23 28 MIN. QFF PRESSURE IN HPA 1011.7 1006.5 1013.6 1006.2 1004.3 998.8 998.6 1000.2 1003.7 1012.0 1010.6 1015.1 998.6 DAY 4 15 31 28 12 26 29 6 4 1 9 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.3 863.4 866.8 862.2 862.6 860.1 858.9 860.0 862.3 867.4 868.3 867.4 863.8 MAX. QFE PRESSURE IN HPA 874.7 871.5 876.4 867.9 867.1 865.1 862.3 863.8 866.7 876.5 875.8 877.7 877.7 DAY 26 7 9 24 15 4 8 29 23 15 22 28 MIN. QFE PRESSURE IN HPA 857.9 852.1 860.4 852.9 854.8 854.2 856.0 856.8 858.7 862.5 862.4 856.0 852.1 DAY 4 15 31 1 12 26 29 6 4 25 9 24 MEAN QNH PRESSURE IN HPA 1022.9 1019.7 1023.5 1018.3 1018.8 1015.9 1014.5 1015.8 1018.4 1024.2 1025.2 1024.2 1020.1 MAX. QNH PRESSURE IN HPA 1032.6 1028.9 1034.5 1024.8 1023.9 1021.6 1018.4 1020.1 1023.4 1034.6 1033.8 1036.0 1036.0 DAY 26 7 9 24 15 4 8 29 23 15 22 28 MIN. QNH PRESSURE IN HPA 1013.4 1006.7 1016.2 1007.6 1009.8 1009.1 1011.2 1012.1 1014.3 1018.6 1018.5 1011.2 1006.7 DAY 4 15 31 1 12 26 29 6 4 25 9 24 MEAN QFF PRESSURE IN HPA 1028.4 1023.6 1024.6 1015.9 1013.0 1006.5 1003.4 1005.9 1010.4 1020.2 1024.2 1027.2 1017.0 MAX. QFF PRESSURE IN HPA 1042.7 1034.3 1036.9 1024.1 1019.9 1012.9 1009.0 1011.2 1017.4 1035.2 1033.7 1050.3 1050.3 DAY 26 7 17 4 15 7 8 29 23 15 13 28 MIN. QFF PRESSURE IN HPA 1015.1 1008.2 1013.6 1005.6 1005.0 998.8 999.7 1001.5 1005.3 1013.1 1013.4 1014.8 998.8 DAY 4 15 31 1 12 26 28 6 4 25 8 24 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 867.0 864.0 867.6 863.4 863.8 861.3 860.0 861.3 863.6 868.3 868.9 868.0 864.8 MAX. QFE PRESSURE IN HPA 874.8 872.3 877.3 869.3 868.8 866.1 863.8 865.2 867.4 876.9 876.3 877.7 877.7 DAY 26 7 9 24 15 4 15 29 23 15 22 28 MIN. QFE PRESSURE IN HPA 858.7 853.9 860.3 853.2 856.7 854.9 856.5 857.7 859.9 861.7 861.9 856.6 853.2 DAY 4 15 31 1 12 26 29 6 4 25 9 24 MEAN QNH PRESSURE IN HPA 1023.8 1020.3 1024.5 1019.7 1020.1 1017.2 1015.7 1017.2 1019.9 1025.2 1025.9 1024.9 1021.2 MAX. QNH PRESSURE IN HPA 1032.7 1029.8 1035.6 1026.4 1025.8 1022.7 1020.1 1021.7 1024.2 1035.1 1034.4 1036.0 1036.0 DAY 26 7 9 24 15 4 15 29 23 15 22 28 MIN. QNH PRESSURE IN HPA 1014.3 1008.8 1016.1 1008.0 1012.0 1009.9 1011.8 1013.1 1015.6 1017.7 1017.9 1011.9 1008.0 DAY 4 15 31 1 12 26 29 6 4 25 9 24 MEAN QFF PRESSURE IN HPA 1029.1 1024.1 1025.3 1016.8 1013.8 1007.2 1004.2 1006.6 1011.0 1020.6 1024.4 1027.9 1017.6 MAX. QFF PRESSURE IN HPA 1043.0 1035.0 1039.5 1024.5 1020.9 1013.3 1009.9 1012.7 1016.8 1035.1 1035.2 1050.4 1050.4 DAY 26 7 16 3 15 7 8 29 22 15 13 28 MIN. QFF PRESSURE IN HPA 1016.0 1008.8 1013.1 1005.2 1006.7 997.8 999.5 1001.5 1005.6 1011.6 1012.6 1015.8 997.8 DAY 4 18 31 1 12 26 29 6 4 25 9 24 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 867.0 863.9 867.6 863.5 864.0 861.5 860.4 861.6 863.7 868.3 869.0 867.9 864.9 MAX. QFE PRESSURE IN HPA 875.0 872.3 877.3 869.5 869.4 866.1 864.3 865.7 868.1 876.9 876.8 877.3 877.3 DAY 25 7 9 23 15 7 8 29 23 15 22 28 MIN. QFE PRESSURE IN HPA 857.8 851.8 858.7 852.1 856.8 854.9 856.9 857.7 859.7 861.7 862.4 856.4 851.8 DAY 22 18 31 1 12 26 29 6 4 25 9 24 MEAN QNH PRESSURE IN HPA 1023.7 1020.2 1024.5 1019.8 1020.3 1017.5 1016.2 1017.6 1020.0 1025.3 1026.1 1024.9 1021.4 MAX. QNH PRESSURE IN HPA 1032.9 1029.8 1035.6 1026.6 1026.5 1022.7 1020.7 1022.3 1025.0 1035.1 1035.0 1035.6 1035.6 DAY 25 7 9 23 15 7 8 29 23 15 22 28 MIN. QNH PRESSURE IN HPA 1013.2 1006.4 1014.3 1006.7 1012.1 1009.9 1012.2 1013.1 1015.4 1017.7 1018.5 1011.6 1006.4 DAY 22 18 31 1 12 26 29 6 4 25 9 24 MEAN QFF PRESSURE IN HPA 1028.5 1023.5 1024.8 1016.7 1013.9 1007.6 1004.5 1006.8 1010.6 1020.0 1023.4 1027.0 1017.3 MAX. QFF PRESSURE IN HPA 1041.4 1034.7 1040.5 1025.3 1021.0 1014.3 1010.5 1012.8 1017.1 1035.5 1035.4 1048.2 1048.2 DAY 26 7 16 3 15 7 7 29 23 15 13 28 MIN. QFF PRESSURE IN HPA 1015.2 1004.7 1010.8 1003.8 1004.5 998.1 999.4 1000.4 1004.7 1013.1 1012.6 1015.4 998.1 DAY 4 18 31 1 1 26 27 6 4 13 8 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.8 0.0 6.0 13.1 16.5 22.2 25.4 25.7 21.1 14.7 8.3 0.8 12.7 MINIMUN AIR TEMPERATURE (C) -5.2 -4.1 1.9 6.8 9.4 13.9 17.6 17.3 12.6 8.6 3.6 -1.6 6.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 2 0 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 20 15 2 0 0 0 0 0 0 0 0 10 47 DAYS WITH FREEZING MIN.<= 0 27 24 9 0 0 0 0 0 0 0 6 21 87 TEMPERATURE RECORDS LOWEST(C) -11.8 -11.2 -6.2 2.2 3.2 9.2 14.4 11.0 7.6 4.2 -3.4 -7.8 -11.8 DAY 15 10 10 7 24 1 13 31 28 30 27 18 MAXIMUM AIR TEMPERATURE (C) 2.4 4.6 11.0 19.4 22.9 29.4 32.5 33.6 29.3 21.8 14.2 4.2 18.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 12 26 25 10 0 0 0 73 DAYS WITH MAXIMUM TEMP. <= 0 8 6 0 0 0 0 0 0 0 0 0 5 19 TEMPERATURE RECORDS HIGHEST(C) 6.4 11.8 23.4 28.8 27.0 34.8 37.0 40.2 36.8 26.0 20.0 10.4 40.2 DAY 5 26 30 25 7 26 31 5 1 7 2 1 DIF. BETWEEN (MAX.-MIN.) (C) 7.6 8.7 9.1 12.6 13.5 15.5 14.9 16.3 16.7 13.2 10.6 5.8 12.1 MEAN DAILY TEMP. (MDT) (C) -1.4 0.3 6.5 13.1 16.1 21.7 25.0 25.5 20.9 15.2 8.9 1.3 12.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 43.1 125.4 138.4 31.8 0.0 0.0 0.0 338.7 HEATING DEG. DAYS(BASE 18 0C) 601.5 496.4 357.9 150.1 66.4 0.8 0.0 0.0 7.7 84.9 274.0 516.3 2556.0 DEWPOINT (MEAN C) -5.3 -6.2 0.0 2.6 2.5 6.9 8.3 7.3 2.5 4.8 1.4 -4.0 1.7 MIXING RATIO (G/KG) 3.05 2.99 4.59 5.46 5.45 7.52 8.25 8.01 5.57 6.44 5.00 3.41 5.48 VAPOUR PRESSURE (HPA) 4.22 4.14 6.32 7.52 7.49 10.29 11.24 10.93 7.68 8.89 6.92 4.71 7.53 SATURATION DEF. (HPA) 1.31 2.29 3.55 8.40 12.02 17.76 22.52 23.91 18.79 8.50 4.47 1.91 10.45 RELATIVE HUMIDITY (MEAN %) 78 66 68 53 43 41 37 36 34 57 65 72 54 RELATIVE HUMIDITY (MAX. %) 89 81 86 79 65 64 56 54 53 78 85 85 73 RELATIVE HUMIDITY (MIN. %) 64 47 49 32 25 24 22 20 18 34 43 56 36 RELATIVE HUMIDITY (MEAN% 03UTC) 84 77 80 73 63 63 55 52 51 72 79 79 69 RELATIVE HUMIDITY (MEAN% 09UTC) 69 58 61 40 33 30 28 26 25 40 52 65 44 RELATIVE HUMIDITY (MEAN% 15UTC) 79 59 59 42 30 27 24 23 22 48 57 69 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 30.6 45.1 96.4 86.2 5.5 24.4 0.0 0.0 0.0 22.7 73.0 106.3 490.2 DAYS WITH PRECIPITATION >=10 0 1 3 5 0 1 0 0 0 0 2 3 15 DAYS WITH PRECIPITATION >= 5 3 3 7 5 0 1 0 0 0 3 2 5 29 DAYS WITH PRECIPITATION >= 1 7 6 12 9 2 3 0 0 0 6 2 12 59 DAYS WITH PRECIPITATION 8 11 17 10 3 5 0 0 0 9 3 15 81 GREATEST DAILY PRECIPITATION 9.0 28.6 23.0 27.0 3.5 20.0 0.0 0.0 0.0 6.0 56.0 44.0 56.0 DAY 14 26 23 4 16 21 ** ** ** 16 4 9 DAY WITH THUNDER STORM 0 0 1 4 1 5 0 0 0 1 0 2 14 DAYS WITH SNOW OR SLEET 5 7 2 0 0 0 0 0 0 0 0 11 25 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 180 180 225 225 45 45 45 225 225 225 225 225 PREVAILING WIND SPEED(KNOTS) 11.6 11.4 11.5 11.1 13.3 7.7 8.6 6.3 10.7 10.3 9.3 8.4 10.6 PREVAILING WIND PERCENT 12.5 16.5 14.5 22.9 22.2 12.9 19.8 14.5 14.6 14.5 14.6 19.8 13.7 CALMS PERCENT OF WIND 72.6 62.1 62.1 48.8 43.5 64.6 59.3 61.7 62.5 69.0 65.8 54.4 60.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 196 200 199 206 207 9 20 355 205 212 206 207 206 VECTOR WIND MAGNITUDE(KNOTS) 2.3 2.5 2.4 4.2 3.9 0.5 1.7 0.5 1.9 1.7 2.2 2.9 1.8 WIND STEADINESES (MEAN %) 85.2 65.8 68.6 79.2 65.0 16.1 47.2 16.7 57.6 68.0 75.9 80.6 50.0 WIND SPEED (MEAN KNOTS) 2.7 3.8 3.5 5.3 6.0 3.1 3.6 3.0 3.3 2.5 2.9 3.6 3.6 FASTEST WIND DIRECTION 200 160 180 200 180 230 210 210 200 240 210 210 200 FASTEST WIND SPEED (KNOTS) 17 23 23 29 27 19 19 23 19 23 19 17 29 DAY 18 16 7 9 16 21 6 6 18 26 3 28 DAYS WITH SKY CLEAR (0-2)/8 11 10 5 12 21 29 31 29 30 20 19 11 228 DAYS WITH P.CLOUDY (3-6)/8 12 11 12 12 7 1 0 2 0 6 9 10 82 DAYS WITH CLOUDY (7-8)/8 8 7 14 6 3 0 0 0 0 5 2 10 55 DAYS WITH VISIBILITY =< 2 KM 8 1 3 0 0 0 1 0 0 2 0 2 17 DURATION OF SUNSHINE HOURS 116.4 157.0 131.5 231.0 317.5 348.6 374.6 309.3 285.7 211.6 183.7 113.5 2780.4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.3 866.0 863.5 864.3 862.4 861.9 859.6 860.3 865.3 868.1 868.8 864.8 864.3 MAX. QFE PRESSURE IN HPA 875.0 874.8 870.4 870.9 869.0 868.6 865.2 865.5 871.3 872.7 876.0 874.5 876.0 DAY-HOUR 12-18 15- 6 29- 6 19- 6 24-18 17- 6 11- 6 27- 6 27- 6 20- 9 24- 6 17- 6 MIN. QFE PRESSURE IN HPA 857.6 856.5 849.9 855.9 852.8 854.4 853.0 854.7 858.1 864.0 859.6 853.2 849.9 DAY-HOUR 25-12 4- 0 6-12 4-15 16-15 11-15 13-15 11-15 3-12 25-12 30-21 31-15 MEAN QNH PRESSURE IN HPA 1023.0 1022.6 1019.7 1020.7 1018.6 1017.9 1015.3 1016.2 1021.9 1025.1 1025.8 1021.3 1020.7 MAX. QNH PRESSURE IN HPA 1032.9 1032.7 1027.7 1028.2 1026.1 1025.6 1021.7 1022.1 1028.7 1030.3 1034.1 1032.4 1034.1 DAY-HOUR 12-18 15- 6 29- 6 19- 6 24-18 17- 6 11- 6 27- 6 27- 6 20- 9 24- 6 17- 6 MIN. QNH PRESSURE IN HPA 1013.0 1011.8 1004.2 1011.1 1007.5 1009.4 1007.7 1009.7 1013.6 1020.3 1015.3 1008.0 1004.2 DAY-HOUR 25-12 4- 0 6-12 4-15 16-15 11-15 13-15 11-15 3-12 25-12 30-21 31-15 MEAN QFF PRESSURE IN HPA 1028.0 1026.4 1019.7 1016.4 1012.4 1008.4 1003.9 1004.6 1013.1 1019.9 1024.4 1024.6 1016.8 MAX. QFF PRESSURE IN HPA 1040.1 1039.9 1033.1 1025.8 1023.9 1016.4 1012.4 1012.5 1024.3 1026.8 1036.5 1038.2 1040.1 DAY-HOUR 1- 3 15- 6 11- 6 14- 3 24-18 17- 6 12- 3 27- 6 27- 6 20-15 24- 6 17- 6 MIN. QFF PRESSURE IN HPA 1014.5 1014.4 1004.0 1005.8 999.7 998.3 997.2 995.5 1002.5 1013.6 1012.7 1010.2 995.5 DAY-HOUR 31-12 4- 0 6-12 9- 9 16-15 26-18 13-15 6- 0 3-12 25-21 30-21 31-18 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 866.5 865.7 863.2 864.1 862.5 862.1 859.7 860.4 865.3 868.0 868.9 865.0 864.3 MAX. QFE PRESSURE IN HPA 874.8 873.2 868.0 868.8 868.8 867.1 864.6 864.2 870.0 871.5 873.6 873.6 874.8 DAY 13 15 29 14 25 17 12 27 16 13 24 17 MIN. QFE PRESSURE IN HPA 858.8 856.5 851.9 858.0 857.0 855.9 856.6 856.0 860.1 864.9 863.8 858.0 851.9 DAY 31 4 7 9 22 11 15 6 19 15 5 28 MEAN QNH PRESSURE IN HPA 1023.2 1022.3 1019.5 1020.4 1018.6 1018.2 1015.5 1016.2 1021.8 1025.0 1025.9 1021.5 1020.7 MAX. QNH PRESSURE IN HPA 1032.7 1030.9 1024.9 1025.8 1025.8 1023.9 1021.0 1020.6 1027.2 1028.9 1031.3 1031.3 1032.7 DAY 13 15 29 14 25 17 12 27 16 13 24 17 MIN. QNH PRESSURE IN HPA 1014.4 1011.8 1006.5 1013.5 1012.3 1011.1 1011.9 1011.2 1015.9 1021.4 1020.1 1013.5 1006.5 DAY 31 4 7 9 22 11 15 6 19 15 5 28 MEAN QFF PRESSURE IN HPA 1027.8 1025.8 1019.3 1016.0 1012.3 1008.8 1004.0 1004.5 1012.6 1019.4 1024.0 1024.3 1016.6 MAX. QFF PRESSURE IN HPA 1040.0 1036.7 1030.4 1025.8 1023.2 1014.3 1011.6 1010.3 1020.9 1026.4 1032.0 1036.4 1040.0 DAY 1 15 11 14 25 18 12 27 27 21 24 17 MIN. QFF PRESSURE IN HPA 1015.8 1014.4 1006.5 1006.7 1004.7 999.1 998.6 995.5 1004.2 1014.6 1016.3 1012.9 995.5 DAY 31 4 7 9 22 27 23 6 19 26 3 1 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.3 865.7 863.5 864.6 863.0 862.7 860.6 861.2 865.9 868.4 869.0 864.8 864.7 MAX. QFE PRESSURE IN HPA 874.6 873.5 868.8 869.8 869.0 868.2 864.8 865.1 870.6 872.0 874.3 873.6 874.6 DAY 13 15 29 19 25 17 12 27 16 13 24 17 MIN. QFE PRESSURE IN HPA 857.6 856.5 852.3 857.0 858.1 855.9 856.9 857.0 860.6 865.2 863.5 856.6 852.3 DAY 31 4 6 4 22 11 15 6 19 10 4 4 MEAN QNH PRESSURE IN HPA 1022.9 1022.3 1019.8 1021.0 1019.2 1018.9 1016.5 1017.2 1022.6 1025.4 1026.1 1021.2 1021.1 MAX. QNH PRESSURE IN HPA 1032.5 1031.2 1025.8 1027.0 1026.1 1025.2 1021.3 1021.6 1027.9 1029.5 1032.1 1031.3 1032.5 DAY 13 15 29 19 25 17 12 27 16 13 24 17 MIN. QNH PRESSURE IN HPA 1013.0 1011.8 1007.0 1012.3 1013.6 1011.1 1012.2 1012.3 1016.5 1021.7 1019.8 1011.9 1007.0 DAY 31 4 6 4 22 11 15 6 19 10 4 4 MEAN QFF PRESSURE IN HPA 1028.5 1026.7 1020.2 1017.3 1013.5 1009.8 1005.4 1006.2 1014.6 1021.0 1025.4 1024.7 1017.8 MAX. QFF PRESSURE IN HPA 1040.1 1038.2 1031.9 1025.8 1023.3 1016.1 1012.4 1012.3 1022.0 1026.8 1034.3 1037.4 1040.1 DAY 1 15 11 14 25 17 12 27 27 21 24 17 MIN. QFF PRESSURE IN HPA 1014.6 1015.4 1007.9 1006.7 1006.3 1001.0 1000.3 998.1 1005.9 1016.1 1017.2 1012.5 998.1 DAY 31 4 6 9 2 11 23 6 19 10 4 1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.2 866.7 864.3 865.3 863.3 863.0 860.9 861.7 866.7 869.3 869.7 865.4 865.3 MAX. QFE PRESSURE IN HPA 874.8 874.8 870.4 870.9 869.0 868.6 865.2 865.5 871.3 872.4 876.0 874.5 876.0 DAY 13 15 29 19 25 17 11 27 27 20 24 17 MIN. QFE PRESSURE IN HPA 859.0 858.0 851.1 857.2 858.3 856.0 857.0 857.7 860.9 866.0 863.6 857.2 851.1 DAY 31 4 6 9 22 11 15 6 3 10 4 4 MEAN QNH PRESSURE IN HPA 1023.9 1023.5 1020.7 1021.8 1019.5 1019.2 1016.8 1017.7 1023.4 1026.4 1026.9 1022.0 1021.8 MAX. QNH PRESSURE IN HPA 1032.7 1032.7 1027.7 1028.2 1026.1 1025.6 1021.7 1022.1 1028.7 1030.0 1034.1 1032.4 1034.1 DAY 13 15 29 19 25 17 11 27 27 20 24 17 MIN. QNH PRESSURE IN HPA 1014.6 1013.5 1005.6 1012.6 1013.8 1011.2 1012.3 1013.1 1016.8 1022.6 1019.9 1012.6 1005.6 DAY 31 4 6 9 22 11 15 6 3 10 4 4 MEAN QFF PRESSURE IN HPA 1029.4 1027.7 1020.9 1017.5 1013.2 1009.5 1005.4 1006.0 1014.8 1021.4 1026.0 1025.9 1018.1 MAX. QFF PRESSURE IN HPA 1040.1 1039.9 1033.1 1025.4 1022.7 1016.4 1011.6 1012.5 1024.3 1026.7 1036.5 1038.2 1040.1 DAY 1 15 11 14 25 17 11 27 27 21 24 17 MIN. QFF PRESSURE IN HPA 1016.3 1016.6 1005.4 1007.2 1006.7 1000.5 1001.2 998.5 1005.2 1016.6 1017.8 1013.9 998.5 DAY 31 4 6 9 28 11 7 6 3 10 4 4 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 866.6 866.5 864.0 864.6 862.6 862.3 860.1 860.8 865.7 868.5 869.0 864.9 864.6 MAX. QFE PRESSURE IN HPA 874.3 874.6 869.6 870.5 867.3 868.6 864.6 864.2 870.2 872.7 874.8 873.3 874.8 DAY 12 15 11 19 24 17 11 27 15 20 24 17 MIN. QFE PRESSURE IN HPA 858.9 859.7 850.8 856.6 857.8 855.4 856.7 857.5 859.6 865.2 863.6 855.7 850.8 DAY 31 4 6 9 22 11 13 6 3 25 4 31 MEAN QNH PRESSURE IN HPA 1023.3 1023.2 1020.3 1021.0 1018.7 1018.4 1015.9 1016.7 1022.3 1025.5 1026.1 1021.4 1021.1 MAX. QNH PRESSURE IN HPA 1032.1 1032.5 1026.7 1027.8 1024.1 1025.6 1021.0 1020.6 1027.4 1030.3 1032.7 1031.0 1032.7 DAY 12 15 11 19 24 17 11 27 15 20 24 17 MIN. QNH PRESSURE IN HPA 1014.5 1015.4 1005.2 1011.9 1013.2 1010.5 1012.0 1012.9 1015.3 1021.7 1019.9 1010.8 1005.2 DAY 31 4 6 9 22 11 13 6 3 25 4 31 MEAN QFF PRESSURE IN HPA 1028.0 1026.6 1019.9 1016.2 1012.3 1008.7 1004.5 1004.8 1013.1 1019.7 1024.3 1024.3 1016.9 MAX. QFF PRESSURE IN HPA 1038.7 1038.3 1031.9 1024.3 1021.4 1016.4 1010.9 1010.8 1021.4 1026.3 1033.2 1036.2 1038.7 DAY 12 15 11 14 24 17 11 27 27 20 24 17 MIN. QFF PRESSURE IN HPA 1016.2 1016.7 1005.0 1005.8 1005.4 1000.2 999.5 998.5 1003.8 1015.1 1016.6 1012.3 998.5 DAY 31 20 6 9 16 11 7 6 3 10 1 4 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 865.4 865.3 862.8 863.7 861.7 861.0 858.7 859.3 864.2 867.3 867.8 864.0 863.4 MAX. QFE PRESSURE IN HPA 873.6 872.5 868.5 868.6 867.8 866.6 863.6 862.9 868.8 872.0 873.3 871.7 873.6 DAY 12 15 11 19 24 17 11 27 15 20 24 17 MIN. QFE PRESSURE IN HPA 857.6 858.7 849.9 856.0 855.9 854.6 854.0 855.6 858.1 864.0 861.5 854.0 849.9 DAY 25 20 6 4 16 11 13 5 3 25 30 31 MEAN QNH PRESSURE IN HPA 1022.0 1021.9 1019.0 1019.9 1017.7 1016.9 1014.2 1015.0 1020.5 1024.1 1024.7 1020.4 1019.7 MAX. QNH PRESSURE IN HPA 1031.3 1030.1 1025.5 1025.6 1024.7 1023.3 1019.9 1019.1 1025.8 1029.5 1031.0 1029.2 1031.3 DAY 12 15 11 19 24 17 11 27 15 20 24 17 MIN. QNH PRESSURE IN HPA 1013.0 1014.3 1004.2 1011.2 1011.1 1009.6 1008.9 1010.7 1013.6 1020.3 1017.5 1008.9 1004.2 DAY 25 20 6 4 16 11 13 5 3 25 30 31 MEAN QFF PRESSURE IN HPA 1026.4 1025.3 1018.8 1015.5 1011.4 1007.4 1002.8 1003.3 1011.5 1018.5 1022.7 1023.2 1015.6 MAX. QFF PRESSURE IN HPA 1038.3 1035.0 1030.7 1023.0 1022.0 1013.2 1009.6 1009.1 1018.9 1026.7 1031.8 1034.2 1038.3 DAY 12 15 11 13 24 17 11 27 26 20 24 17 MIN. QFF PRESSURE IN HPA 1014.5 1014.7 1004.0 1006.2 1002.6 999.0 998.4 997.2 1002.5 1014.3 1013.7 1011.0 997.2 DAY 31 20 6 9 16 26 13 6 3 10 30 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.0 865.7 862.9 863.6 861.4 860.5 858.1 858.9 864.2 867.4 868.1 864.5 863.4 MAX. QFE PRESSURE IN HPA 874.1 872.3 868.5 868.3 868.2 866.3 863.3 862.1 868.5 871.7 873.2 872.2 874.1 DAY 12 14 11 19 24 17 11 27 26 20 24 17 MIN. QFE PRESSURE IN HPA 858.5 858.6 850.2 855.9 852.8 854.4 853.0 854.7 858.9 864.0 860.8 853.2 850.2 DAY 25 3 6 4 16 11 13 11 3 25 30 31 MEAN QNH PRESSURE IN HPA 1022.6 1022.2 1019.1 1019.8 1017.4 1016.4 1013.6 1014.4 1020.5 1024.3 1025.0 1020.9 1019.7 MAX. QNH PRESSURE IN HPA 1031.9 1029.8 1025.5 1025.3 1025.2 1023.0 1019.5 1018.2 1025.5 1029.2 1030.9 1029.7 1031.9 DAY 12 14 11 19 24 17 11 27 26 20 24 17 MIN. QNH PRESSURE IN HPA 1014.0 1014.2 1004.5 1011.1 1007.5 1009.4 1007.7 1009.7 1014.5 1020.3 1016.7 1008.0 1004.5 DAY 25 3 6 4 16 11 13 11 3 25 30 31 MEAN QFF PRESSURE IN HPA 1028.0 1026.5 1019.3 1016.1 1011.7 1007.2 1002.5 1003.5 1012.7 1019.8 1024.3 1024.5 1016.3 MAX. QFF PRESSURE IN HPA 1039.4 1036.0 1031.3 1023.7 1023.1 1013.7 1009.8 1009.0 1019.9 1026.8 1033.2 1036.0 1039.4 DAY 12 13 11 13 24 17 11 27 26 20 24 17 MIN. QFF PRESSURE IN HPA 1015.7 1015.3 1004.7 1007.9 999.7 998.3 997.2 997.7 1004.8 1016.1 1014.1 1010.3 997.2 DAY 31 20 6 9 16 26 13 5 3 25 30 31 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 866.4 866.1 863.6 864.6 862.5 861.6 859.1 860.1 865.3 868.1 868.8 865.1 864.3 MAX. QFE PRESSURE IN HPA 875.0 873.1 868.5 869.4 869.0 866.8 863.9 863.2 869.7 872.3 873.7 873.4 875.0 DAY 12 14 11 19 24 17 11 31 15 20 24 16 MIN. QFE PRESSURE IN HPA 859.2 857.8 851.5 857.2 856.4 855.1 855.4 855.6 860.0 864.0 860.4 853.2 851.5 DAY 31 3 6 4 16 26 15 11 3 25 30 31 MEAN QNH PRESSURE IN HPA 1023.1 1022.8 1019.9 1021.1 1018.6 1017.6 1014.7 1015.9 1021.9 1025.1 1025.8 1021.6 1020.7 MAX. QNH PRESSURE IN HPA 1032.9 1030.8 1025.5 1026.5 1026.1 1023.5 1020.2 1019.4 1026.9 1029.8 1031.4 1031.1 1032.9 DAY 12 14 11 19 24 17 11 31 15 20 24 16 MIN. QNH PRESSURE IN HPA 1014.9 1013.2 1006.0 1012.6 1011.6 1010.2 1010.5 1010.7 1015.8 1020.3 1016.2 1008.0 1006.0 DAY 31 3 6 4 16 26 15 11 3 25 30 31 MEAN QFF PRESSURE IN HPA 1028.4 1026.9 1020.1 1016.8 1012.3 1007.9 1003.3 1004.3 1013.3 1020.1 1024.9 1025.4 1017.0 MAX. QFF PRESSURE IN HPA 1039.5 1037.5 1031.1 1024.7 1023.9 1013.8 1010.1 1009.3 1020.8 1026.4 1034.1 1036.5 1039.5 DAY 12 14 10 13 24 16 11 27 26 20 24 17 MIN. QFF PRESSURE IN HPA 1015.9 1015.7 1006.4 1009.5 1004.0 998.3 999.4 998.2 1004.7 1014.6 1013.8 1010.2 998.2 DAY 31 3 5 9 16 26 22 11 3 25 30 31 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 866.2 866.1 863.5 864.5 862.7 862.0 859.5 860.5 865.4 868.1 868.8 865.0 864.4 MAX. QFE PRESSURE IN HPA 875.0 873.2 868.6 869.5 869.0 867.4 864.2 863.2 869.8 871.6 873.5 873.8 875.0 DAY 12 14 10 19 24 17 11 31 26 20 23 16 MIN. QFE PRESSURE IN HPA 859.0 857.0 851.5 857.6 857.0 855.9 856.2 856.4 860.0 864.8 859.6 853.8 851.5 DAY 31 3 6 4 16 10 15 5 3 25 30 31 MEAN QNH PRESSURE IN HPA 1022.9 1022.7 1019.7 1020.9 1018.9 1018.0 1015.2 1016.3 1021.9 1025.0 1025.9 1021.5 1020.7 MAX. QNH PRESSURE IN HPA 1032.9 1030.9 1025.6 1026.6 1026.1 1024.2 1020.6 1019.4 1027.0 1029.0 1031.2 1031.6 1032.9 DAY 12 14 10 19 24 17 11 31 26 20 23 16 MIN. QNH PRESSURE IN HPA 1014.6 1012.3 1006.0 1013.0 1012.3 1011.1 1011.4 1011.6 1015.8 1021.3 1015.3 1008.7 1006.0 DAY 31 3 6 4 16 10 15 5 3 25 30 31 MEAN QFF PRESSURE IN HPA 1027.4 1026.0 1019.3 1016.0 1012.5 1008.2 1003.7 1004.4 1012.7 1019.2 1024.1 1024.5 1016.5 MAX. QFF PRESSURE IN HPA 1038.2 1036.3 1031.5 1025.0 1023.7 1014.9 1010.4 1009.6 1020.3 1025.6 1031.5 1036.0 1038.2 DAY 12 14 10 13 24 17 11 27 26 20 23 16 MIN. QFF PRESSURE IN HPA 1016.2 1014.6 1006.6 1008.8 1005.0 998.8 999.3 996.9 1003.6 1013.6 1012.7 1010.2 996.9 DAY 31 3 6 8 16 26 22 5 3 25 30 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.9 -1.3 1.5 10.1 13.0 19.9 24.3 22.2 18.8 14.4 6.8 1.6 10.6 MINIMUN AIR TEMPERATURE (C) -7.2 -3.9 -3.1 4.5 8.4 12.0 15.0 14.9 10.5 6.6 2.4 -1.0 4.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 0 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 20 13 12 0 0 0 0 0 0 0 3 6 54 DAYS WITH FREEZING MIN.<= 0 29 27 24 1 0 0 0 0 0 0 7 18 106 TEMPERATURE RECORDS LOWEST(C) -14.6 -12.4 -10.4 -0.4 3.4 7.8 11.0 9.2 5.0 2.0 -11.2 -9.2 -14.6 DAY 10 12 1 3 2 5 1 31 30 30 27 27 MAXIMUM AIR TEMPERATURE (C) 0.1 2.1 6.7 16.0 18.3 26.9 32.5 29.0 27.0 22.5 12.4 5.2 16.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 4 24 9 7 0 0 0 44 DAYS WITH MAXIMUM TEMP. <= 0 19 6 4 0 0 0 0 0 0 0 0 2 31 TEMPERATURE RECORDS HIGHEST(C) 4.6 6.8 14.8 22.0 29.4 33.4 39.0 35.4 32.6 27.0 19.0 11.4 39.0 DAY 1 19 30 12 29 29 30 17 9 13 6 14 DIF. BETWEEN (MAX.-MIN.) (C) 7.3 6.0 9.8 11.5 9.9 14.9 17.5 14.1 16.5 15.9 10.0 6.2 11.7 MEAN DAILY TEMP. (MDT) (C) -3.6 -0.9 1.8 10.2 13.3 19.4 23.8 22.0 18.7 14.6 7.4 2.1 10.7 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.4 7.7 89.7 45.5 3.3 0.0 0.0 0.0 146.6 HEATING DEG. DAYS(BASE 18 0C) 668.5 546.9 501.6 232.7 153.3 7.3 0.0 0.8 22.0 109.3 318.7 492.8 3054.0 DEWPOINT (MEAN C) -9.6 -7.7 -5.7 1.1 6.0 7.6 6.5 8.5 2.1 0.3 -0.5 -4.7 0.3 MIXING RATIO (G/KG) 2.27 2.63 3.08 4.89 6.96 7.87 7.55 8.30 5.29 4.62 4.58 3.34 5.12 VAPOUR PRESSURE (HPA) 3.14 3.63 4.26 6.73 9.56 10.75 10.31 11.37 7.29 6.39 6.34 4.62 7.03 SATURATION DEF. (HPA) 1.67 2.11 3.04 6.14 6.13 13.50 21.69 16.59 15.85 10.99 4.25 2.46 8.70 RELATIVE HUMIDITY (MEAN %) 66 63 61 58 66 50 37 45 37 42 63 65 54 RELATIVE HUMIDITY (MAX. %) 80 76 80 81 84 76 58 65 58 64 83 78 74 RELATIVE HUMIDITY (MIN. %) 51 50 41 37 47 27 20 29 19 24 44 51 37 RELATIVE HUMIDITY (MEAN% 03UTC) 71 65 74 75 79 72 56 63 54 62 72 71 68 RELATIVE HUMIDITY (MEAN% 09UTC) 57 60 52 43 56 36 28 34 27 27 53 55 44 RELATIVE HUMIDITY (MEAN% 15UTC) 64 63 52 47 54 32 23 33 24 35 58 65 46 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 33.9 88.2 13.1 56.1 106.2 16.3 0.0 1.4 0.0 0.0 92.8 81.3 489.3 DAYS WITH PRECIPITATION >=10 1 2 0 3 2 0 0 0 0 0 6 3 17 DAYS WITH PRECIPITATION >= 5 1 4 1 4 9 1 0 0 0 0 6 4 30 DAYS WITH PRECIPITATION >= 1 6 12 4 9 17 5 0 1 0 0 9 6 69 DAYS WITH PRECIPITATION 14 17 11 10 21 9 0 1 0 0 10 13 106 GREATEST DAILY PRECIPITATION 14.6 29.0 5.3 13.0 19.0 8.0 0.0 1.4 0.0 0.0 25.0 31.4 31.4 DAY 3 23 15 18 9 24 ** 28 ** ** 7 16 DAY WITH THUNDER STORM 0 0 0 1 6 3 0 1 0 0 2 0 13 DAYS WITH SNOW OR SLEET 14 16 7 2 0 0 0 0 0 0 5 7 51 DAYS WITH DUST 1 0 0 0 0 0 0 0 0 3 0 0 4 WIND DIRECTION (PREVAILING) 180 180 180 225 225 225 45 45 225 225 180 180 180 PREVAILING WIND SPEED(KNOTS) 11.7 11.6 9.8 10.2 10.8 11.1 7.1 7.3 12.1 12.3 11.4 9.6 10.5 PREVAILING WIND PERCENT 23.8 33.2 20.6 21.3 14.9 13.8 12.9 18.1 12.1 14.1 22.5 32.7 15.4 CALMS PERCENT OF WIND 58.1 35.3 52.0 50.4 65.7 62.5 62.9 57.3 65.0 64.9 55.4 47.2 56.5 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 192 199 202 208 221 211 233 17 212 206 201 193 202 VECTOR WIND MAGNITUDE(KNOTS) 3.3 6.2 2.7 3.2 1.3 1.8 0.5 1.9 1.3 2.1 4.4 4.3 2.4 WIND STEADINESES (MEAN %) 75.0 89.9 67.5 71.1 48.1 51.4 16.1 59.4 41.9 63.6 88.0 89.6 60.0 WIND SPEED (MEAN KNOTS) 4.4 6.9 4.0 4.5 2.7 3.5 3.1 3.2 3.1 3.3 5.0 4.8 4.0 FASTEST WIND DIRECTION 190 180 220 220 210 230 210 360 210 210 230 210 210 FASTEST WIND SPEED (KNOTS) 23 23 19 23 17 19 21 16 23 31 29 23 31 DAY 1 1 30 12 9 3 25 10 13 26 6 13 DAYS WITH SKY CLEAR (0-2)/8 12 9 16 12 7 22 30 29 28 25 14 8 212 DAYS WITH P.CLOUDY (3-6)/8 10 13 8 11 12 7 1 2 2 6 13 16 101 DAYS WITH CLOUDY (7-8)/8 9 7 7 7 12 1 0 0 0 0 3 7 53 DAYS WITH VISIBILITY =< 2 KM 4 2 1 0 0 0 0 0 0 0 0 0 7 DURATION OF SUNSHINE HOURS 136.7 140.5 192.1 223.1 179.9 316.3 374.7 330.9 288.5 258.4 145.5 84.4 2671.0 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 865.4 861.8 864.8 863.3 864.7 861.5 860.5 863.9 865.6 867.6 867.6 865.4 864.3 MAX. QFE PRESSURE IN HPA 876.5 872.6 876.3 868.5 871.4 866.9 866.8 870.8 871.7 873.2 876.2 871.3 876.5 DAY-HOUR 5- 6 15-18 12- 6 19-18 14- 6 12- 6 6- 6 31- 6 29- 6 29- 6 4- 6 10- 6 MIN. QFE PRESSURE IN HPA 851.2 850.8 852.4 857.0 855.0 856.2 855.0 857.2 860.3 862.6 849.7 859.3 849.7 DAY-HOUR 30-15 24-12 30-15 17-21 9- 0 27-15 31-15 18-15 13-15 10-12 24-18 13-12 MEAN QNH PRESSURE IN HPA 1021.9 1017.8 1021.2 1019.6 1021.1 1017.4 1016.3 1020.3 1022.2 1024.4 1024.5 1022.0 1020.7 MAX. QNH PRESSURE IN HPA 1034.6 1030.2 1034.4 1025.5 1028.8 1023.7 1023.5 1028.1 1029.2 1030.9 1034.3 1028.7 1034.6 DAY-HOUR 5- 6 15-18 12- 6 19-18 14- 6 12- 6 6- 6 31- 6 29- 6 29- 6 4- 6 10- 6 MIN. QNH PRESSURE IN HPA 1005.7 1005.2 1007.1 1012.3 1010.0 1011.4 1010.0 1012.6 1016.1 1018.7 1004.0 1015.0 1004.0 DAY-HOUR 30-15 24-12 30-15 17-21 9- 0 27-15 31-15 18-15 13-15 10-12 24-18 13-12 MEAN QFF PRESSURE IN HPA 1028.3 1022.3 1024.1 1017.0 1016.8 1009.1 1005.7 1010.6 1014.7 1019.6 1024.0 1024.7 1018.1 MAX. QFF PRESSURE IN HPA 1046.0 1037.4 1041.3 1025.6 1026.1 1015.9 1014.5 1020.7 1026.1 1028.2 1034.3 1034.8 1046.0 DAY-HOUR 5- 6 16- 3 12- 6 19- 6 2- 9 6- 9 12- 6 31- 6 29- 6 31- 6 18- 6 28-18 MIN. QFF PRESSURE IN HPA 1010.9 1006.5 1004.6 1010.4 1005.3 1001.5 996.9 1002.1 1007.6 1010.5 1002.4 1014.4 996.9 DAY-HOUR 30-15 24-12 30-12 17-21 9- 0 27-12 31-12 1- 0 13-12 10-12 24-18 13-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 865.2 861.6 864.6 863.1 864.5 861.5 860.6 863.9 865.7 867.5 867.4 865.5 864.3 MAX. QFE PRESSURE IN HPA 876.2 872.0 874.7 867.8 869.8 866.1 864.7 869.4 870.3 872.3 874.6 870.8 876.2 DAY 5 16 12 8 14 11 6 12 29 30 18 1 MIN. QFE PRESSURE IN HPA 852.8 854.7 853.4 857.0 855.0 858.1 856.1 858.5 861.4 863.7 855.6 860.5 852.8 DAY 31 5 31 18 9 17 10 19 25 11 25 14 MEAN QNH PRESSURE IN HPA 1021.7 1017.6 1021.1 1019.3 1020.9 1017.5 1016.5 1020.2 1022.2 1024.4 1024.2 1022.0 1020.6 MAX. QNH PRESSURE IN HPA 1034.3 1029.5 1032.6 1024.7 1027.0 1022.7 1021.1 1026.5 1027.6 1029.8 1032.5 1028.1 1034.3 DAY 5 16 12 8 14 11 6 12 29 30 18 1 MIN. QNH PRESSURE IN HPA 1007.5 1009.7 1008.2 1012.3 1010.0 1013.6 1011.3 1014.0 1017.4 1020.0 1010.7 1016.3 1007.5 DAY 31 5 31 18 9 17 10 19 25 11 25 14 MEAN QFF PRESSURE IN HPA 1027.7 1021.7 1023.7 1016.6 1016.6 1009.2 1005.8 1010.3 1014.5 1019.0 1023.3 1024.5 1017.8 MAX. QFF PRESSURE IN HPA 1044.0 1036.6 1040.2 1024.1 1024.1 1014.5 1012.1 1020.2 1023.9 1026.6 1031.7 1031.9 1044.0 DAY 5 16 12 7 14 12 13 12 29 30 18 29 MIN. QFF PRESSURE IN HPA 1011.8 1011.3 1004.9 1011.6 1005.3 1003.5 997.6 1002.1 1007.9 1011.7 1010.7 1015.4 997.6 DAY 1 24 31 14 9 28 31 1 25 11 7 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 865.1 861.5 864.9 863.3 864.7 862.0 861.4 864.7 866.3 867.9 867.7 865.3 864.6 MAX. QFE PRESSURE IN HPA 875.7 871.5 875.2 868.1 870.5 866.5 865.9 870.0 870.9 871.9 874.9 870.4 875.7 DAY 5 16 12 8 14 12 6 31 29 30 18 1 MIN. QFE PRESSURE IN HPA 854.1 854.5 854.1 857.8 855.5 857.9 856.4 859.6 861.2 863.0 857.5 860.1 854.1 DAY 31 24 31 18 9 17 10 1 25 26 25 15 MEAN QNH PRESSURE IN HPA 1021.6 1017.5 1021.3 1019.6 1021.2 1018.1 1017.3 1021.1 1022.9 1024.8 1024.5 1021.9 1021.0 MAX. QNH PRESSURE IN HPA 1033.7 1028.9 1033.2 1025.0 1027.8 1023.2 1022.5 1027.2 1028.2 1029.4 1032.8 1027.7 1033.7 DAY 5 16 12 8 14 12 6 31 29 30 18 1 MIN. QNH PRESSURE IN HPA 1009.0 1009.5 1009.0 1013.2 1010.6 1013.4 1011.6 1015.3 1017.1 1019.2 1012.9 1015.9 1009.0 DAY 31 24 31 18 9 17 10 1 25 26 25 15 MEAN QFF PRESSURE IN HPA 1028.5 1022.4 1024.8 1017.6 1017.0 1010.1 1007.0 1011.9 1016.1 1021.0 1024.6 1025.0 1018.8 MAX. QFF PRESSURE IN HPA 1045.1 1037.4 1040.9 1025.1 1024.5 1015.2 1014.2 1020.5 1025.8 1027.9 1033.3 1032.9 1045.1 DAY 5 16 12 19 14 12 12 31 29 30 18 29 MIN. QFF PRESSURE IN HPA 1012.7 1011.0 1007.2 1012.2 1005.8 1004.6 1000.0 1003.1 1008.5 1012.1 1012.4 1015.4 1000.0 DAY 1 24 31 14 9 28 10 1 25 26 22 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.2 862.3 865.6 864.0 865.4 862.3 861.7 865.1 866.9 868.8 868.7 866.2 865.3 MAX. QFE PRESSURE IN HPA 876.5 871.4 876.3 868.4 871.4 866.9 866.8 870.8 871.7 873.2 876.2 871.3 876.5 DAY 5 16 12 8 14 12 6 31 29 29 4 10 MIN. QFE PRESSURE IN HPA 855.2 854.1 855.5 860.0 855.6 858.2 856.4 860.5 862.5 863.4 859.5 861.1 854.1 DAY 30 24 22 18 9 17 10 1 17 26 25 14 MEAN QNH PRESSURE IN HPA 1022.8 1018.4 1022.2 1020.3 1021.9 1018.4 1017.7 1021.6 1023.7 1025.8 1025.7 1022.8 1021.8 MAX. QNH PRESSURE IN HPA 1034.6 1028.8 1034.4 1025.4 1028.8 1023.7 1023.5 1028.1 1029.2 1030.9 1034.3 1028.7 1034.6 DAY 5 16 12 8 14 12 6 31 29 29 4 10 MIN. QNH PRESSURE IN HPA 1010.3 1009.0 1010.6 1015.8 1010.7 1013.7 1011.6 1016.3 1018.6 1019.7 1015.2 1017.0 1009.0 DAY 30 24 22 18 9 17 10 1 17 26 25 14 MEAN QFF PRESSURE IN HPA 1029.5 1023.0 1025.3 1017.8 1017.7 1010.0 1006.9 1011.9 1016.2 1021.1 1025.5 1025.8 1019.2 MAX. QFF PRESSURE IN HPA 1046.0 1036.8 1041.3 1025.6 1026.1 1014.9 1014.5 1020.7 1026.1 1028.2 1034.3 1033.3 1046.0 DAY 5 16 12 19 2 12 12 31 29 31 18 28 MIN. QFF PRESSURE IN HPA 1014.8 1011.0 1009.1 1011.5 1005.3 1004.8 999.6 1005.1 1010.0 1013.5 1014.4 1016.3 999.6 DAY 2 23 31 14 9 27 10 1 17 26 22 14 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 865.9 862.1 865.3 863.6 865.1 861.9 860.8 864.4 865.9 867.8 868.0 865.5 864.7 MAX. QFE PRESSURE IN HPA 876.2 871.2 875.8 868.2 870.8 866.2 866.1 869.5 870.7 872.3 875.0 870.6 876.2 DAY 5 15 12 19 14 12 6 31 28 29 4 1 MIN. QFE PRESSURE IN HPA 853.6 851.5 855.4 860.4 855.9 858.2 856.4 860.0 861.7 863.6 859.8 860.0 851.5 DAY 30 24 30 22 9 27 10 18 17 26 7 15 MEAN QNH PRESSURE IN HPA 1022.5 1018.2 1021.8 1019.8 1021.6 1017.9 1016.7 1020.8 1022.6 1024.7 1024.9 1022.1 1021.1 MAX. QNH PRESSURE IN HPA 1034.3 1028.6 1033.8 1025.2 1028.1 1022.9 1022.7 1026.6 1028.0 1029.8 1032.9 1027.9 1034.3 DAY 5 15 12 19 14 12 6 31 28 29 4 1 MIN. QNH PRESSURE IN HPA 1008.4 1006.0 1010.5 1016.2 1011.1 1013.7 1011.6 1015.8 1017.7 1019.9 1015.5 1015.8 1006.0 DAY 30 24 30 22 9 27 10 18 17 26 7 15 MEAN QFF PRESSURE IN HPA 1028.4 1022.4 1024.5 1016.9 1017.1 1009.3 1005.8 1010.9 1014.6 1019.2 1024.1 1024.5 1018.1 MAX. QFF PRESSURE IN HPA 1044.2 1034.6 1040.0 1024.5 1026.1 1015.9 1013.3 1018.7 1025.0 1026.0 1031.6 1032.4 1044.2 DAY 5 16 12 19 2 6 13 31 29 29 18 28 MIN. QFF PRESSURE IN HPA 1013.3 1008.8 1006.9 1011.4 1005.9 1003.2 998.3 1005.0 1008.9 1011.8 1012.1 1014.4 998.3 DAY 30 24 30 13 9 27 31 1 17 10 7 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 864.7 861.1 864.1 862.6 864.3 860.7 859.6 863.0 864.6 866.5 866.9 864.7 863.6 MAX. QFE PRESSURE IN HPA 874.5 871.2 873.7 867.0 869.4 865.6 864.6 868.0 869.4 871.0 873.4 870.0 874.5 DAY 4 15 12 19 14 11 7 31 28 29 17 10 MIN. QFE PRESSURE IN HPA 852.2 850.8 853.1 859.5 857.0 856.5 855.1 858.2 860.7 862.6 857.0 859.3 850.8 DAY 30 24 30 14 9 27 31 18 13 10 24 13 MEAN QNH PRESSURE IN HPA 1021.2 1017.0 1020.4 1018.8 1020.6 1016.6 1015.3 1019.2 1021.1 1023.2 1023.7 1021.1 1019.9 MAX. QNH PRESSURE IN HPA 1032.4 1028.6 1031.4 1023.8 1026.5 1022.2 1021.0 1024.9 1026.5 1028.4 1031.1 1027.2 1032.4 DAY 4 15 12 19 14 11 7 31 28 29 17 10 MIN. QNH PRESSURE IN HPA 1006.8 1005.2 1007.9 1015.2 1012.3 1011.8 1010.2 1013.7 1016.6 1018.7 1012.3 1015.0 1005.2 DAY 30 24 30 14 9 27 31 18 13 10 24 13 MEAN QFF PRESSURE IN HPA 1027.2 1021.1 1023.0 1016.2 1016.3 1008.3 1004.6 1009.4 1013.5 1017.9 1022.8 1023.6 1017.0 MAX. QFF PRESSURE IN HPA 1041.5 1033.4 1037.6 1023.5 1025.3 1014.3 1011.6 1017.0 1023.2 1024.5 1030.2 1032.3 1041.5 DAY 5 15 12 19 2 6 12 31 30 29 27 28 MIN. QFF PRESSURE IN HPA 1011.5 1006.5 1004.6 1010.6 1008.4 1001.5 996.9 1003.1 1007.6 1010.5 1010.8 1014.7 996.9 DAY 30 24 30 22 9 27 31 18 13 10 7 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 865.2 861.5 864.2 862.7 863.9 860.4 859.2 862.6 864.5 866.8 867.1 865.2 863.6 MAX. QFE PRESSURE IN HPA 875.6 871.7 873.5 866.8 869.1 865.5 863.8 867.9 869.5 871.3 873.9 869.6 875.6 DAY 4 15 12 19 14 10 7 11 28 29 17 10 MIN. QFE PRESSURE IN HPA 851.2 852.8 852.4 858.4 856.6 856.2 855.0 857.2 860.3 862.8 855.3 859.9 851.2 DAY 30 24 30 17 8 27 31 18 13 10 24 13 MEAN QNH PRESSURE IN HPA 1021.7 1017.5 1020.5 1018.8 1020.2 1016.2 1014.9 1018.7 1020.9 1023.5 1023.9 1021.7 1019.9 MAX. QNH PRESSURE IN HPA 1033.6 1029.2 1031.2 1023.5 1026.2 1022.1 1020.1 1024.8 1026.6 1028.7 1031.7 1026.7 1033.6 DAY 4 15 12 19 14 10 7 11 28 29 17 10 MIN. QNH PRESSURE IN HPA 1005.7 1007.5 1007.1 1013.9 1011.9 1011.4 1010.0 1012.6 1016.1 1019.0 1010.4 1015.6 1005.7 DAY 30 24 30 17 8 27 31 18 13 10 24 13 MEAN QFF PRESSURE IN HPA 1028.6 1022.4 1023.9 1016.8 1016.0 1008.2 1004.6 1009.7 1014.1 1019.7 1023.9 1024.9 1017.7 MAX. QFF PRESSURE IN HPA 1044.0 1035.4 1038.4 1023.6 1026.0 1014.5 1010.9 1017.9 1023.9 1027.9 1033.0 1034.6 1044.0 DAY 9 15 12 19 2 10 12 31 30 31 26 28 MIN. QFF PRESSURE IN HPA 1010.9 1009.6 1005.0 1011.0 1007.4 1001.9 997.6 1002.6 1007.9 1011.8 1010.4 1015.8 997.6 DAY 30 24 30 13 9 27 31 18 13 10 24 13 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 865.6 862.2 864.8 863.7 864.8 861.4 860.2 863.8 865.5 867.7 867.6 865.6 864.4 MAX. QFE PRESSURE IN HPA 876.2 872.6 873.8 868.5 870.0 866.7 864.6 869.3 870.7 871.8 874.8 870.3 876.2 DAY 4 15 11 19 13 10 6 11 28 29 17 10 MIN. QFE PRESSURE IN HPA 852.0 854.1 853.8 858.3 857.1 857.4 856.1 857.6 861.4 863.5 849.7 860.5 849.7 DAY 30 7 30 17 8 27 9 18 24 10 24 13 MEAN QNH PRESSURE IN HPA 1022.2 1018.3 1021.2 1020.0 1021.3 1017.3 1016.0 1020.1 1022.0 1024.6 1024.4 1022.2 1020.8 MAX. QNH PRESSURE IN HPA 1034.3 1030.2 1031.6 1025.5 1027.2 1023.4 1021.0 1026.4 1028.0 1029.3 1032.7 1027.6 1034.3 DAY 4 15 11 19 13 10 6 11 28 29 17 10 MIN. QNH PRESSURE IN HPA 1006.6 1009.0 1008.7 1013.8 1012.4 1012.8 1011.3 1013.0 1017.4 1019.8 1004.0 1016.3 1004.0 DAY 30 7 30 17 8 27 9 18 24 10 24 13 MEAN QFF PRESSURE IN HPA 1028.9 1023.0 1024.2 1017.4 1017.0 1008.9 1005.2 1010.5 1014.6 1019.8 1024.3 1025.3 1018.3 MAX. QFF PRESSURE IN HPA 1045.0 1037.0 1038.4 1025.1 1025.7 1015.1 1012.2 1019.2 1025.4 1027.5 1033.1 1034.8 1045.0 DAY 4 15 11 19 2 10 12 11 28 31 17 28 MIN. QFF PRESSURE IN HPA 1011.4 1011.6 1006.2 1011.8 1007.8 1003.0 999.6 1003.1 1009.3 1012.0 1002.4 1015.8 999.6 DAY 30 20 30 13 8 27 9 18 24 10 24 13 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 865.5 862.1 864.7 863.6 864.8 861.6 860.5 864.1 865.6 867.8 867.7 865.4 864.5 MAX. QFE PRESSURE IN HPA 876.2 872.5 874.1 868.5 870.1 866.7 864.6 869.7 870.7 872.2 874.9 870.3 876.2 DAY 4 15 11 19 13 10 6 11 28 29 17 10 MIN. QFE PRESSURE IN HPA 852.6 853.6 853.7 857.0 856.4 857.9 856.6 857.7 861.4 863.7 854.6 859.7 852.6 DAY 30 20 30 17 8 27 9 18 24 10 24 13 MEAN QNH PRESSURE IN HPA 1022.0 1018.2 1021.2 1019.9 1021.3 1017.6 1016.4 1020.4 1022.2 1024.7 1024.6 1021.9 1020.9 MAX. QNH PRESSURE IN HPA 1034.3 1030.1 1031.9 1025.5 1027.3 1023.4 1021.0 1026.9 1028.0 1029.7 1032.8 1027.6 1034.3 DAY 4 15 11 19 13 10 6 11 28 29 17 10 MIN. QNH PRESSURE IN HPA 1007.3 1008.4 1008.6 1012.3 1011.6 1013.4 1011.9 1013.1 1017.4 1020.0 1009.6 1015.4 1007.3 DAY 30 20 30 17 8 27 9 18 24 10 24 13 MEAN QFF PRESSURE IN HPA 1027.9 1022.5 1023.7 1017.0 1016.7 1009.0 1005.4 1010.6 1014.3 1019.2 1023.9 1024.3 1017.9 MAX. QFF PRESSURE IN HPA 1043.7 1036.6 1038.8 1024.9 1023.8 1014.6 1012.6 1019.8 1025.5 1026.9 1032.0 1033.4 1043.7 DAY 4 15 11 7 2 10 12 11 28 29 17 28 MIN. QFF PRESSURE IN HPA 1011.3 1009.8 1005.3 1010.4 1005.9 1003.2 999.5 1002.9 1008.0 1011.5 1012.1 1014.4 999.5 DAY 2 20 30 17 8 27 30 18 24 10 24 13 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.5 -0.6 3.7 11.1 15.2 21.1 24.2 23.6 21.0 12.9 5.2 1.0 11.3 MINIMUN AIR TEMPERATURE (C) -5.6 -3.8 -1.0 6.1 9.7 12.6 15.9 15.5 11.9 6.2 2.2 -1.8 5.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 1 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 17 11 4 0 0 0 0 0 0 0 3 5 40 DAYS WITH FREEZING MIN.<= 0 27 26 21 1 0 0 0 0 0 0 8 26 109 TEMPERATURE RECORDS LOWEST(C) -15.0 -13.8 -6.4 0.0 3.8 9.0 12.4 12.8 8.4 1.0 -5.2 -6.4 -15.0 DAY 21 6 22 24 4 22 1 29 28 8 30 17 MAXIMUM AIR TEMPERATURE (C) 1.1 3.7 9.1 17.0 21.2 27.9 31.6 30.9 29.3 20.0 9.0 4.3 17.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 9 22 21 13 0 0 0 65 DAYS WITH MAXIMUM TEMP. <= 0 14 6 1 0 0 0 0 0 0 0 0 4 25 TEMPERATURE RECORDS HIGHEST(C) 9.2 15.0 21.6 26.0 26.0 35.0 37.0 37.0 34.4 28.2 18.0 11.4 37.0 DAY 28 27 30 19 27 27 24 31 1 1 9 2 DIF. BETWEEN (MAX.-MIN.) (C) 6.7 7.5 10.1 10.9 11.5 15.3 15.7 15.4 17.4 13.8 6.8 6.1 11.4 MEAN DAILY TEMP. (MDT) (C) -2.3 -0.1 4.1 11.5 15.4 20.3 23.8 23.2 20.6 13.1 5.6 1.3 11.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 17.0 87.3 69.9 20.7 0.0 0.0 0.0 194.9 HEATING DEG. DAYS(BASE 18 0C) 628.0 505.8 432.0 196.2 88.7 2.9 0.0 0.0 2.8 156.9 372.5 518.6 2904.3 DEWPOINT (MEAN C) -6.4 -5.1 -3.5 1.0 6.5 6.2 8.8 7.6 3.2 2.2 0.7 -1.2 1.7 MIXING RATIO (G/KG) 2.84 3.13 3.51 4.92 7.17 7.18 8.52 7.93 5.93 5.36 4.83 4.09 5.45 VAPOUR PRESSURE (HPA) 3.93 4.33 4.85 6.77 9.85 9.83 11.63 10.86 8.16 7.43 6.68 5.69 7.50 SATURATION DEF. (HPA) 1.45 1.81 3.60 7.04 8.09 16.32 20.05 19.64 18.22 8.32 2.52 0.99 9.00 RELATIVE HUMIDITY (MEAN %) 76 73 63 55 60 43 41 40 36 54 75 87 59 RELATIVE HUMIDITY (MAX. %) 86 86 82 77 82 68 62 61 58 75 91 94 77 RELATIVE HUMIDITY (MIN. %) 64 58 44 35 39 26 24 24 19 32 58 76 42 RELATIVE HUMIDITY (MEAN% 03UTC) 80 80 76 69 76 63 60 58 55 70 82 90 72 RELATIVE HUMIDITY (MEAN% 09UTC) 71 65 53 44 46 31 30 28 26 39 64 79 48 RELATIVE HUMIDITY (MEAN% 15UTC) 76 69 54 43 49 28 28 30 23 45 74 87 51 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 43.7 70.2 91.7 136.1 75.0 4.0 4.8 2.3 0.0 34.4 155.9 60.3 678.4 DAYS WITH PRECIPITATION >=10 0 3 3 3 2 0 0 0 0 1 6 3 21 DAYS WITH PRECIPITATION >= 5 4 4 3 5 4 0 0 0 0 1 9 3 33 DAYS WITH PRECIPITATION >= 1 8 6 8 10 11 1 1 1 0 4 12 4 66 DAYS WITH PRECIPITATION 15 11 13 11 14 1 2 4 0 4 15 7 97 GREATEST DAILY PRECIPITATION 9.3 22.2 50.4 49.0 20.1 4.0 4.0 1.4 0.0 31.0 52.0 24.2 52.0 DAY 7 20 8 8 12 1 28 7 ** 28 1 14 DAY WITH THUNDER STORM 0 0 0 2 5 1 1 1 0 0 0 0 10 DAYS WITH SNOW OR SLEET 15 11 10 0 0 0 0 0 0 0 6 4 46 DAYS WITH DUST 0 0 0 0 1 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 180 180 180 180 180 180 360 45 180 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 12.8 10.2 10.9 10.9 10.2 9.5 5.5 6.5 10.4 9.1 10.2 10.7 10.5 PREVAILING WIND PERCENT 17.7 20.1 16.5 28.8 22.2 14.6 14.2 10.5 9.6 11.7 15.8 3.6 13.8 CALMS PERCENT OF WIND 52.0 61.6 62.1 43.3 56.5 52.7 66.8 66.1 68.3 69.0 71.3 89.5 63.3 NO. OF WIND OBSERVATION 248 224 248 240 248 239 247 248 240 248 240 248 2918 VECTOR WIND DIRECTION (MEAN) 193 194 205 202 199 208 16 345 205 188 194 178 199 VECTOR WIND MAGNITUDE(KNOTS) 2.9 2.4 2.2 5.2 2.5 1.6 1.1 0.2 0.7 0.9 2.1 0.3 1.6 WIND STEADINESES (MEAN %) 65.9 72.7 64.7 88.1 64.1 38.1 52.4 7.1 28.0 40.9 77.8 42.9 50.0 WIND SPEED (MEAN KNOTS) 4.4 3.3 3.4 5.9 3.9 4.2 2.1 2.8 2.5 2.2 2.7 0.7 3.2 FASTEST WIND DIRECTION 210 210 210 210 200 210 220 260 200 200 190 180 210 FASTEST WIND SPEED (KNOTS) 39 23 23 33 23 23 17 27 19 17 23 16 39 DAY 29 13 3 11 17 20 2 27 21 1 11 1 DAYS WITH SKY CLEAR (0-2)/8 12 8 14 6 7 24 29 24 30 21 8 8 191 DAYS WITH P.CLOUDY (3-6)/8 7 12 9 15 15 6 2 7 0 8 8 8 97 DAYS WITH CLOUDY (7-8)/8 12 8 8 9 9 0 0 0 0 2 14 15 77 DAYS WITH VISIBILITY =< 2 KM 2 5 2 0 0 0 0 0 0 0 1 12 22 DURATION OF SUNSHINE HOURS 126.2 103.1 206.9 106.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.8 865.5 864.5 863.7 864.1 862.4 861.7 863.2 864.4 870.4 867.3 870.0 865.3 MAX. QFE PRESSURE IN HPA 873.8 873.2 873.7 869.5 870.0 873.1 867.7 867.4 869.7 876.5 875.7 876.5 876.5 DAY-HOUR 6- 6 9-18 23- 6 17- 6 8-18 22- 6 27- 6 30- 6 16- 6 18- 6 21- 6 26- 6 MIN. QFE PRESSURE IN HPA 852.2 856.2 852.7 857.0 858.1 855.2 855.4 857.5 859.6 863.4 853.4 862.1 852.2 DAY-HOUR 8- 3 3- 3 5-12 20-12 2-12 3-12 11-15 13-12 3-12 3-12 11- 0 5- 3 MEAN QNH PRESSURE IN HPA 1023.5 1022.0 1020.9 1020.0 1020.4 1018.5 1017.7 1019.4 1020.8 1027.6 1024.1 1027.2 1021.8 MAX. QNH PRESSURE IN HPA 1031.6 1030.9 1031.4 1026.6 1027.2 1030.8 1024.6 1024.2 1026.9 1034.6 1033.7 1034.6 1034.6 DAY-HOUR 6- 6 9-18 23- 6 17- 6 8-18 22- 6 27- 6 30- 6 16- 6 18- 6 21- 6 26- 6 MIN. QNH PRESSURE IN HPA 1006.8 1011.4 1007.4 1012.3 1013.6 1010.3 1010.5 1012.9 1015.3 1019.7 1008.2 1018.2 1006.8 DAY-HOUR 8- 3 3- 3 5-12 20-12 2-12 3-12 11-15 13-12 3-12 3-12 11- 0 5- 3 MEAN QFF PRESSURE IN HPA 1029.0 1026.2 1022.4 1016.9 1014.9 1009.6 1007.1 1009.1 1012.1 1023.6 1024.5 1030.6 1018.8 MAX. QFF PRESSURE IN HPA 1041.1 1036.2 1035.9 1026.6 1025.3 1025.1 1013.7 1016.4 1019.5 1031.7 1036.4 1038.2 1041.1 DAY-HOUR 19- 6 6- 6 23- 6 23- 6 8-18 22- 3 27- 6 30- 3 16- 3 18- 3 29-21 20- 9 MIN. QFF PRESSURE IN HPA 1009.9 1015.7 1008.1 1007.2 1005.6 1001.8 1000.6 1001.7 1005.0 1010.1 1005.2 1018.8 1000.6 DAY-HOUR 8-18 1-21 3- 9 20-12 31-12 3-12 11-12 13-12 3-12 2- 0 11- 0 5-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 866.8 865.2 864.5 863.7 863.9 862.5 861.8 863.2 864.5 870.3 867.1 870.0 865.3 MAX. QFE PRESSURE IN HPA 872.8 871.4 871.6 868.9 869.5 871.8 865.1 866.4 869.0 876.0 875.1 874.6 876.0 DAY 15 10 31 1 9 22 28 29 16 18 21 27 MIN. QFE PRESSURE IN HPA 854.0 856.7 856.4 857.6 859.1 857.8 858.3 858.9 861.0 863.7 853.4 862.8 853.4 DAY 8 3 6 26 12 3 11 10 3 2 11 5 MEAN QNH PRESSURE IN HPA 1023.6 1021.7 1020.9 1020.0 1020.3 1018.6 1017.9 1019.5 1020.9 1027.5 1023.9 1027.2 1021.8 MAX. QNH PRESSURE IN HPA 1030.4 1028.8 1029.0 1025.9 1026.6 1029.3 1021.6 1023.1 1026.1 1034.1 1033.0 1032.5 1034.1 DAY 15 10 31 1 9 22 28 29 16 18 21 27 MIN. QNH PRESSURE IN HPA 1008.9 1012.0 1011.6 1013.0 1014.7 1013.2 1013.8 1014.5 1016.9 1020.0 1008.2 1019.0 1008.2 DAY 8 3 6 26 12 3 11 10 3 2 11 5 MEAN QFF PRESSURE IN HPA 1028.9 1025.7 1022.2 1016.6 1014.8 1009.8 1007.0 1009.1 1011.9 1022.8 1024.0 1030.1 1018.6 MAX. QFF PRESSURE IN HPA 1038.6 1034.8 1032.9 1024.0 1024.2 1023.2 1011.1 1013.9 1018.1 1029.6 1035.6 1037.3 1038.6 DAY 15 6 23 24 9 22 21 29 16 18 30 20 MIN. QFF PRESSURE IN HPA 1011.4 1016.5 1012.1 1009.1 1007.3 1004.0 1001.8 1002.6 1006.0 1010.1 1005.2 1020.5 1001.8 DAY 9 3 6 11 12 27 25 10 3 2 11 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.6 865.3 864.5 863.8 864.1 863.1 862.6 864.0 865.0 870.9 867.3 869.8 865.6 MAX. QFE PRESSURE IN HPA 872.4 870.9 871.7 869.0 869.6 873.0 866.7 867.0 869.2 876.3 875.1 874.9 876.3 DAY 6 10 23 17 9 22 27 24 16 18 21 26 MIN. QFE PRESSURE IN HPA 852.2 856.2 855.8 858.3 859.7 858.4 859.3 859.9 861.7 864.6 854.2 862.1 852.2 DAY 8 3 8 26 2 3 11 10 3 28 11 5 MEAN QNH PRESSURE IN HPA 1023.3 1021.9 1020.9 1020.1 1020.5 1019.3 1018.7 1020.3 1021.5 1028.2 1024.1 1027.0 1022.1 MAX. QNH PRESSURE IN HPA 1030.0 1028.2 1029.2 1026.1 1026.7 1030.6 1023.4 1023.8 1026.3 1034.4 1033.0 1032.8 1034.4 DAY 6 10 23 17 9 22 27 24 16 18 21 26 MIN. QNH PRESSURE IN HPA 1006.8 1011.4 1011.0 1013.8 1015.4 1013.9 1015.0 1015.6 1017.7 1021.0 1009.1 1018.2 1006.8 DAY 8 3 8 26 2 3 11 10 3 28 11 5 MEAN QFF PRESSURE IN HPA 1029.2 1026.3 1022.9 1017.4 1015.3 1010.9 1008.4 1010.7 1013.6 1025.0 1024.9 1030.9 1019.6 MAX. QFF PRESSURE IN HPA 1039.6 1035.4 1034.5 1024.2 1024.9 1025.1 1012.4 1016.4 1019.5 1031.7 1035.8 1038.1 1039.6 DAY 20 6 23 24 9 22 27 30 16 18 30 20 MIN. QFF PRESSURE IN HPA 1011.9 1016.0 1013.0 1009.1 1007.6 1005.3 1004.0 1004.1 1007.5 1013.9 1006.9 1020.2 1004.0 DAY 8 3 8 20 31 3 25 10 3 2 11 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.6 866.2 865.3 864.3 864.5 863.3 862.9 864.3 865.6 871.7 868.0 870.7 866.2 MAX. QFE PRESSURE IN HPA 873.8 872.0 873.7 869.5 870.0 873.1 867.7 867.4 869.7 876.5 875.7 876.5 876.5 DAY 6 9 23 17 9 22 27 30 16 18 21 26 MIN. QFE PRESSURE IN HPA 853.0 857.5 856.6 858.7 859.1 856.8 858.7 859.5 862.4 864.5 856.0 862.4 853.0 DAY 8 3 3 20 6 3 11 13 3 28 11 5 MEAN QNH PRESSURE IN HPA 1024.5 1022.9 1021.9 1020.7 1020.9 1019.5 1019.1 1020.7 1022.2 1029.1 1024.9 1028.0 1022.9 MAX. QNH PRESSURE IN HPA 1031.6 1029.5 1031.4 1026.6 1027.2 1030.8 1024.6 1024.2 1026.9 1034.6 1033.7 1034.6 1034.6 DAY 6 9 23 17 9 22 27 30 16 18 21 26 MIN. QNH PRESSURE IN HPA 1007.7 1012.9 1011.9 1014.3 1014.7 1012.1 1014.3 1015.2 1018.5 1020.9 1011.2 1018.5 1007.7 DAY 8 3 3 20 6 3 11 13 3 28 11 5 MEAN QFF PRESSURE IN HPA 1030.3 1027.5 1023.6 1017.6 1015.2 1010.4 1008.4 1010.2 1013.4 1025.2 1025.5 1031.6 1019.9 MAX. QFF PRESSURE IN HPA 1041.1 1036.2 1035.9 1026.6 1024.8 1023.9 1013.7 1015.2 1019.2 1031.2 1036.0 1037.8 1041.1 DAY 19 6 23 23 9 22 27 24 16 20 30 26 MIN. QFF PRESSURE IN HPA 1010.3 1017.2 1011.7 1008.0 1007.0 1003.1 1003.8 1003.2 1007.4 1012.9 1009.7 1020.3 1003.1 DAY 8 28 3 20 31 3 25 10 3 2 11 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 867.2 866.0 864.7 863.9 864.4 862.8 862.2 863.4 864.8 870.8 867.5 870.1 865.7 MAX. QFE PRESSURE IN HPA 873.8 872.6 871.8 869.3 869.3 872.1 866.6 866.9 869.0 875.5 874.9 875.9 875.9 DAY 19 9 23 17 8 22 27 30 15 18 21 26 MIN. QFE PRESSURE IN HPA 853.6 858.2 854.0 858.1 858.3 855.8 857.7 858.8 860.8 864.3 856.6 862.5 853.6 DAY 8 3 3 11 6 3 11 13 7 28 11 5 MEAN QNH PRESSURE IN HPA 1024.0 1022.7 1021.2 1020.2 1020.9 1019.0 1018.3 1019.7 1021.2 1028.1 1024.4 1027.3 1022.2 MAX. QNH PRESSURE IN HPA 1031.6 1030.2 1029.3 1026.4 1026.4 1029.6 1023.3 1023.7 1026.1 1033.5 1032.8 1034.0 1034.0 DAY 19 9 23 17 8 22 27 30 15 18 21 26 MIN. QNH PRESSURE IN HPA 1008.4 1013.7 1008.9 1013.6 1013.8 1011.0 1013.1 1014.4 1016.7 1020.7 1011.9 1018.6 1008.4 DAY 8 3 3 11 6 3 11 13 7 28 11 5 MEAN QFF PRESSURE IN HPA 1028.9 1026.6 1022.2 1016.8 1015.0 1009.9 1007.5 1008.9 1012.0 1023.6 1024.6 1030.4 1018.9 MAX. QFF PRESSURE IN HPA 1039.6 1034.4 1032.7 1024.7 1024.1 1022.4 1012.5 1013.9 1017.5 1029.1 1034.9 1038.2 1039.6 DAY 19 9 23 23 8 22 27 30 15 18 30 20 MIN. QFF PRESSURE IN HPA 1010.9 1016.6 1008.1 1009.1 1006.5 1002.1 1002.3 1002.6 1006.2 1011.0 1009.0 1019.1 1002.1 DAY 8 28 3 20 31 3 11 13 3 2 10 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 866.1 864.9 863.6 862.8 863.7 861.7 860.9 862.3 863.3 869.4 866.6 869.3 864.5 MAX. QFE PRESSURE IN HPA 872.6 872.3 870.5 868.6 869.0 870.8 866.0 865.2 867.8 874.1 873.7 874.8 874.8 DAY 19 9 30 17 8 22 27 24 15 17 21 26 MIN. QFE PRESSURE IN HPA 853.3 858.0 852.7 857.0 858.1 855.2 856.1 857.5 859.6 863.4 855.1 862.5 852.7 DAY 8 3 5 20 2 3 11 13 3 3 10 5 MEAN QNH PRESSURE IN HPA 1022.8 1021.4 1019.8 1019.0 1020.0 1017.7 1016.8 1018.4 1019.6 1026.5 1023.3 1026.4 1021.0 MAX. QNH PRESSURE IN HPA 1030.2 1029.8 1027.8 1025.6 1026.1 1028.1 1022.6 1021.7 1024.7 1031.9 1031.4 1032.7 1032.7 DAY 19 9 30 17 8 22 27 24 15 17 21 26 MIN. QNH PRESSURE IN HPA 1008.1 1013.5 1007.4 1012.3 1013.6 1010.3 1011.3 1012.9 1015.3 1019.7 1010.2 1018.6 1007.4 DAY 8 3 5 20 2 3 11 13 3 3 10 5 MEAN QFF PRESSURE IN HPA 1027.9 1025.2 1020.9 1015.6 1014.4 1008.9 1005.9 1008.0 1010.6 1022.0 1023.4 1029.2 1017.7 MAX. QFF PRESSURE IN HPA 1038.6 1034.9 1031.3 1022.6 1023.2 1021.6 1011.8 1012.6 1016.0 1027.4 1033.0 1035.9 1038.6 DAY 19 9 23 23 8 22 27 24 15 17 29 20 MIN. QFF PRESSURE IN HPA 1010.7 1015.8 1008.8 1007.2 1005.6 1001.8 1000.6 1001.7 1005.0 1010.8 1006.0 1018.8 1000.6 DAY 8 28 5 20 31 3 11 13 3 2 10 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.4 864.9 863.8 862.9 863.5 861.3 860.3 861.8 863.2 869.4 866.9 869.8 864.5 MAX. QFE PRESSURE IN HPA 872.7 872.5 870.6 868.6 869.0 870.0 864.0 865.7 867.6 874.3 874.1 875.1 875.1 DAY 6 9 30 16 8 22 27 28 15 17 21 26 MIN. QFE PRESSURE IN HPA 853.9 858.5 853.2 858.2 858.6 855.9 855.4 857.6 860.0 863.6 855.3 864.4 853.2 DAY 8 2 5 26 2 3 11 13 3 3 10 4 MEAN QNH PRESSURE IN HPA 1023.1 1021.4 1020.1 1019.1 1019.7 1017.2 1016.1 1017.9 1019.5 1026.5 1023.6 1027.0 1020.9 MAX. QNH PRESSURE IN HPA 1030.3 1030.1 1027.9 1025.6 1026.1 1027.2 1020.3 1022.3 1024.5 1032.1 1031.9 1033.0 1033.0 DAY 6 9 30 16 8 22 27 28 15 17 21 26 MIN. QNH PRESSURE IN HPA 1008.8 1014.0 1008.0 1013.7 1014.2 1011.1 1010.5 1013.0 1015.8 1019.9 1010.4 1020.8 1008.0 DAY 8 2 5 26 2 3 11 13 3 3 10 4 MEAN QFF PRESSURE IN HPA 1028.9 1025.8 1021.9 1016.5 1014.6 1008.8 1005.8 1008.2 1011.6 1023.3 1024.4 1030.8 1018.4 MAX. QFF PRESSURE IN HPA 1039.9 1035.5 1032.0 1022.4 1023.6 1020.5 1009.8 1013.3 1016.1 1029.2 1034.1 1036.1 1039.9 DAY 19 9 23 23 8 22 27 29 22 17 29 26 MIN. QFF PRESSURE IN HPA 1012.2 1017.5 1009.7 1008.6 1010.0 1003.3 1000.6 1002.9 1006.6 1013.6 1007.2 1022.4 1000.6 DAY 8 2 5 19 12 3 11 13 3 2 10 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 866.9 865.6 864.8 864.1 864.3 862.1 861.4 863.0 864.4 870.2 867.3 870.4 865.4 MAX. QFE PRESSURE IN HPA 872.9 873.2 871.6 869.2 870.0 870.1 867.3 866.3 869.0 875.0 874.6 875.7 875.7 DAY 19 9 30 16 8 22 28 28 15 17 20 26 MIN. QFE PRESSURE IN HPA 853.9 858.0 855.0 858.4 859.8 857.8 856.1 859.0 861.5 865.0 856.2 864.6 853.9 DAY 8 2 5 26 1 3 11 9 7 3 10 4 MEAN QNH PRESSURE IN HPA 1023.6 1022.2 1021.3 1020.5 1020.6 1018.2 1017.4 1019.2 1020.7 1027.4 1024.2 1027.7 1021.9 MAX. QNH PRESSURE IN HPA 1030.5 1030.9 1029.0 1026.3 1027.2 1027.3 1024.1 1023.0 1026.1 1032.9 1032.5 1033.7 1033.7 DAY 19 9 30 16 8 22 28 28 15 17 20 26 MIN. QNH PRESSURE IN HPA 1008.8 1013.5 1010.0 1013.9 1015.5 1013.2 1011.3 1014.6 1017.5 1021.5 1011.4 1021.0 1008.8 DAY 8 2 5 26 1 3 11 9 7 3 10 4 MEAN QFF PRESSURE IN HPA 1029.4 1026.8 1022.9 1017.5 1014.9 1009.1 1006.6 1008.7 1012.0 1023.6 1024.8 1031.3 1018.9 MAX. QFF PRESSURE IN HPA 1041.1 1035.9 1032.4 1024.1 1025.3 1019.8 1013.3 1013.5 1018.1 1029.2 1036.0 1037.0 1041.1 DAY 20 9 23 23 8 21 28 28 15 17 29 16 MIN. QFF PRESSURE IN HPA 1009.9 1017.2 1010.5 1009.1 1009.9 1004.4 1001.4 1001.8 1006.8 1013.0 1008.3 1023.9 1001.4 DAY 8 2 5 19 31 26 11 9 1 1 10 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 866.8 865.6 865.0 864.1 864.3 862.5 861.8 863.3 864.5 870.3 867.4 870.2 865.5 MAX. QFE PRESSURE IN HPA 873.1 872.4 871.8 869.2 869.7 871.2 865.3 866.7 869.2 875.6 875.3 875.4 875.6 DAY 14 9 30 16 8 21 27 28 15 17 20 26 MIN. QFE PRESSURE IN HPA 854.0 857.5 855.9 858.6 860.3 858.4 857.3 858.9 862.0 865.1 856.1 863.0 854.0 DAY 7 2 7 25 1 2 11 9 2 1 10 4 MEAN QNH PRESSURE IN HPA 1023.5 1022.2 1021.5 1020.5 1020.7 1018.6 1017.9 1019.6 1020.9 1027.6 1024.3 1027.5 1022.1 MAX. QNH PRESSURE IN HPA 1030.8 1030.0 1029.3 1026.3 1026.9 1028.6 1021.8 1023.4 1026.3 1033.6 1033.3 1033.4 1033.6 DAY 14 9 30 16 8 21 27 28 15 17 20 26 MIN. QNH PRESSURE IN HPA 1008.9 1012.9 1011.1 1014.2 1016.1 1013.9 1012.7 1014.5 1018.1 1021.6 1011.3 1019.2 1008.9 DAY 7 2 7 25 1 2 11 9 2 1 10 4 MEAN QFF PRESSURE IN HPA 1028.5 1026.1 1022.5 1017.1 1014.9 1009.4 1007.0 1008.8 1011.8 1023.1 1024.6 1030.5 1018.7 MAX. QFF PRESSURE IN HPA 1039.5 1035.4 1032.2 1024.0 1025.2 1021.7 1011.1 1013.7 1018.2 1029.1 1036.4 1037.3 1039.5 DAY 20 5 22 23 8 21 20 29 15 17 29 19 MIN. QFF PRESSURE IN HPA 1010.6 1015.7 1010.8 1008.8 1009.4 1004.5 1002.2 1002.8 1006.7 1011.6 1008.1 1021.2 1002.2 DAY 8 1 7 19 31 26 11 9 2 1 10 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.8 2.4 7.3 13.3 16.3 21.0 24.2 24.2 18.7 14.0 8.3 -0.5 12.6 MINIMUN AIR TEMPERATURE (C) -1.0 -1.3 2.4 6.5 9.1 13.4 16.3 15.8 11.1 7.8 4.4 -3.4 6.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 5 7 0 0 0 0 0 0 0 0 0 16 28 DAYS WITH FREEZING MIN.<= 0 22 19 7 0 0 0 0 0 0 0 3 22 73 TEMPERATURE RECORDS LOWEST(C) -5.4 -6.6 -2.6 1.4 5.0 8.0 10.4 12.8 7.2 3.2 -2.0 -16.2 -16.2 DAY 25 4 2 4 7 30 1 3 16 12 9 7 MAXIMUM AIR TEMPERATURE (C) 5.6 7.2 12.2 19.8 22.5 27.7 30.8 31.3 25.9 20.8 13.3 3.3 18.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 8 18 21 1 0 0 0 49 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 5 6 TEMPERATURE RECORDS HIGHEST(C) 13.0 14.0 20.0 27.6 30.0 35.0 36.6 36.8 32.6 24.0 20.0 9.4 36.8 DAY 3 27 31 21 27 10 30 18 12 6 3 2 DIF. BETWEEN (MAX.-MIN.) (C) 6.6 8.5 9.8 13.3 13.4 14.3 14.5 15.5 14.8 13.0 8.9 6.7 11.6 MEAN DAILY TEMP. (MDT) (C) 2.3 3.0 7.3 13.1 15.8 20.5 23.6 23.6 18.5 14.3 8.8 -0.0 12.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 2.3 21.4 83.7 79.4 2.9 0.0 0.0 0.0 189.7 HEATING DEG. DAYS(BASE 18 0C) 486.7 421.0 330.7 147.9 88.6 10.8 0.0 0.0 10.7 114.5 275.7 559.1 2445.7 DEWPOINT (MEAN C) -2.0 -3.6 0.3 3.9 7.6 7.1 11.1 9.4 5.3 5.4 1.9 -5.4 3.4 MIXING RATIO (G/KG) 3.90 3.51 4.60 6.04 7.78 7.59 9.92 9.05 6.72 6.69 5.23 3.13 6.18 VAPOUR PRESSURE (HPA) 5.40 4.84 6.35 8.32 10.67 10.38 13.48 12.33 9.27 9.25 7.21 4.34 8.49 SATURATION DEF. (HPA) 1.75 2.62 4.26 7.77 8.93 15.87 17.80 19.22 13.20 7.29 4.04 1.87 8.72 RELATIVE HUMIDITY (MEAN %) 78 67 64 57 59 45 46 43 45 60 67 71 59 RELATIVE HUMIDITY (MAX. %) 90 83 84 81 83 66 67 61 67 82 85 83 78 RELATIVE HUMIDITY (MIN. %) 61 47 46 35 39 27 29 27 27 37 46 54 40 RELATIVE HUMIDITY (MEAN% 03UTC) 84 76 78 76 78 64 65 60 65 79 79 79 74 RELATIVE HUMIDITY (MEAN% 09UTC) 71 58 51 45 46 34 37 34 32 44 52 65 47 RELATIVE HUMIDITY (MEAN% 15UTC) 74 63 57 42 45 30 32 30 33 51 65 67 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 73.2 30.6 56.5 89.0 30.5 5.0 0.0 0.0 12.0 38.0 117.8 52.6 505.2 DAYS WITH PRECIPITATION >=10 4 1 1 3 1 0 0 0 0 1 3 2 16 DAYS WITH PRECIPITATION >= 5 6 2 7 7 2 1 0 0 2 2 5 3 37 DAYS WITH PRECIPITATION >= 1 8 6 10 10 4 1 0 0 2 11 10 7 69 DAYS WITH PRECIPITATION 10 11 10 10 4 1 0 0 2 11 13 12 84 GREATEST DAILY PRECIPITATION 16.1 10.2 10.0 22.0 16.0 5.0 0.0 0.0 7.0 13.0 44.0 20.5 44.0 DAY 4 28 12 30 13 28 ** ** 9 15 6 3 DAY WITH THUNDER STORM 0 0 0 4 2 1 0 0 1 2 1 0 11 DAYS WITH SNOW OR SLEET 5 5 1 0 0 0 0 0 0 0 0 6 17 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 180 180 180 180 45 360 45 360 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 9.1 11.0 9.6 9.9 10.3 5.8 7.1 7.2 6.3 7.2 10.6 11.2 10.2 PREVAILING WIND PERCENT 17.3 29.9 24.7 15.4 16.1 14.2 17.7 12.5 17.5 11.7 32.5 31.0 16.2 CALMS PERCENT OF WIND 71.0 49.6 58.3 67.1 62.5 54.8 60.1 66.1 69.2 70.6 50.8 53.2 61.2 NO. OF WIND OBSERVATION 248 224 247 240 248 239 248 248 240 248 240 248 2918 VECTOR WIND DIRECTION (MEAN) 184 187 194 199 195 341 20 18 12 198 192 189 191 VECTOR WIND MAGNITUDE(KNOTS) 1.7 3.3 3.3 2.2 1.5 0.7 1.8 0.9 1.0 0.8 4.7 4.5 1.5 WIND STEADINESES (MEAN %) 70.8 68.7 86.8 73.3 48.4 20.0 60.0 33.3 50.0 40.0 92.2 91.8 44.1 WIND SPEED (MEAN KNOTS) 2.4 4.8 3.8 3.0 3.1 3.5 3.0 2.7 2.0 2.0 5.1 4.9 3.4 FASTEST WIND DIRECTION 210 200 180 190 200 220 210 200 210 180 200 220 200 FASTEST WIND SPEED (KNOTS) 23 23 23 27 19 23 19 16 16 17 29 27 29 DAY 31 1 7 1 9 16 19 1 12 18 28 2 DAYS WITH SKY CLEAR (0-2)/8 12 9 11 17 21 25 31 31 24 20 13 14 228 DAYS WITH P.CLOUDY (3-6)/8 9 14 12 6 8 4 0 0 6 10 10 12 91 DAYS WITH CLOUDY (7-8)/8 10 5 8 7 2 1 0 0 0 1 7 5 46 DAYS WITH VISIBILITY =< 2 KM 6 0 0 0 0 0 0 0 0 0 0 0 6 DURATION OF SUNSHINE HOURS ****** ****** ****** 230.1 313.4 338.5 384.7 240.5 249.5 222.4 163.9 148.0 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.1 864.3 864.5 865.6 864.9 861.1 859.4 860.8 868.2 869.8 865.5 867.8 864.9 MAX. QFE PRESSURE IN HPA 877.0 875.8 871.5 873.4 871.6 866.0 864.5 867.0 874.2 876.4 875.1 876.3 877.0 DAY-HOUR 18-18 18- 9 1-18 5- 6 18- 6 8- 6 1- 6 15- 6 23- 6 11- 6 2- 6 7- 6 MIN. QFE PRESSURE IN HPA 852.0 852.6 851.5 852.3 857.5 856.0 853.9 854.1 861.2 865.2 858.0 852.0 851.5 DAY-HOUR 31-21 1- 0 12- 0 1-15 4-15 25-15 30-12 1-15 7-15 18- 0 25-18 3-12 MEAN QNH PRESSURE IN HPA 1023.8 1020.6 1020.9 1022.2 1021.4 1017.0 1015.1 1016.7 1025.1 1027.0 1022.0 1024.7 1021.4 MAX. QNH PRESSURE IN HPA 1035.2 1033.8 1028.9 1031.1 1029.0 1022.6 1020.9 1023.8 1032.0 1034.5 1033.0 1034.4 1035.2 DAY-HOUR 18-18 18- 9 1-18 5- 6 18- 6 8- 6 1- 6 15- 6 23- 6 11- 6 2- 6 7- 6 MIN. QNH PRESSURE IN HPA 1006.6 1007.3 1006.0 1007.0 1012.9 1011.2 1008.8 1009.0 1017.1 1021.7 1013.5 1006.6 1006.0 DAY-HOUR 31-21 1- 0 12- 0 1-15 4-15 25-15 30-12 1-15 7-15 18- 0 25-18 3-12 MEAN QFF PRESSURE IN HPA 1026.5 1022.8 1020.1 1017.7 1015.2 1008.1 1004.2 1005.8 1017.7 1022.2 1020.5 1028.9 1017.5 MAX. QFF PRESSURE IN HPA 1040.3 1039.1 1031.1 1030.2 1024.8 1015.1 1013.5 1012.5 1025.9 1030.5 1031.6 1047.0 1047.0 DAY-HOUR 18-18 18- 9 1-18 5- 6 18- 3 28-18 1- 6 15- 3 23- 6 11- 6 9- 6 7- 3 MIN. QFF PRESSURE IN HPA 1005.4 1005.4 1005.7 1003.7 1007.8 1001.9 996.1 996.4 1008.7 1014.1 1010.7 1007.8 996.1 DAY-HOUR 31-21 1- 0 7- 9 1-15 4-15 25-15 30-12 1- 9 7-12 14-12 17- 0 3-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 867.2 863.9 864.4 865.6 864.9 861.2 859.7 860.8 868.2 869.7 865.6 867.6 864.9 MAX. QFE PRESSURE IN HPA 876.0 874.7 869.8 871.6 870.7 864.7 863.5 865.8 872.3 875.0 873.2 875.6 876.0 DAY 19 19 18 5 18 8 2 15 24 11 2 7 MIN. QFE PRESSURE IN HPA 856.2 852.6 851.5 856.6 858.3 857.7 855.6 855.7 862.6 865.2 858.2 853.0 851.5 DAY 16 1 12 2 1 3 30 1 8 18 17 4 MEAN QNH PRESSURE IN HPA 1024.0 1020.2 1020.8 1022.2 1021.3 1017.1 1015.4 1016.7 1025.2 1026.9 1022.2 1024.5 1021.4 MAX. QNH PRESSURE IN HPA 1034.1 1032.6 1027.0 1029.0 1028.0 1021.1 1019.8 1022.4 1029.8 1032.9 1030.9 1033.6 1034.1 DAY 19 19 18 5 18 8 2 15 24 11 2 7 MIN. QNH PRESSURE IN HPA 1011.4 1007.3 1006.0 1011.9 1013.8 1013.1 1010.7 1010.8 1018.7 1021.7 1013.7 1007.7 1006.0 DAY 16 1 12 2 1 3 30 1 8 18 17 4 MEAN QFF PRESSURE IN HPA 1026.3 1021.9 1019.8 1017.5 1015.2 1008.1 1004.5 1005.7 1017.3 1021.6 1020.1 1028.2 1017.2 MAX. QFF PRESSURE IN HPA 1038.8 1037.2 1028.6 1027.2 1024.0 1014.9 1012.2 1010.8 1023.7 1028.0 1029.8 1045.3 1045.3 DAY 19 19 2 5 18 29 1 15 23 11 10 7 MIN. QFF PRESSURE IN HPA 1014.3 1005.4 1006.2 1008.8 1008.7 1002.5 998.3 998.9 1009.6 1015.8 1010.7 1011.5 998.3 DAY 16 1 7 23 1 16 31 1 8 14 17 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 867.0 863.8 864.7 865.8 865.2 861.7 860.4 861.6 868.7 870.0 865.6 867.4 865.1 MAX. QFE PRESSURE IN HPA 875.6 874.7 870.7 872.1 871.2 865.5 864.3 866.4 873.2 875.0 873.6 876.0 876.0 DAY 19 19 18 5 18 8 2 15 23 11 2 7 MIN. QFE PRESSURE IN HPA 854.6 853.4 851.5 857.6 859.2 857.3 856.0 856.0 863.6 865.4 858.1 853.0 851.5 DAY 16 1 12 2 1 3 30 1 8 18 17 4 MEAN QNH PRESSURE IN HPA 1023.8 1020.1 1021.1 1022.4 1021.8 1017.7 1016.3 1017.6 1025.7 1027.2 1022.2 1024.3 1021.7 MAX. QNH PRESSURE IN HPA 1033.6 1032.6 1028.0 1029.6 1028.6 1022.1 1020.7 1023.1 1030.9 1032.9 1031.3 1034.1 1034.1 DAY 19 19 18 5 18 8 2 15 23 11 2 7 MIN. QNH PRESSURE IN HPA 1009.6 1008.2 1006.0 1013.0 1014.9 1012.7 1011.2 1011.2 1019.9 1021.9 1013.6 1007.7 1006.0 DAY 16 1 12 2 1 3 30 1 8 18 17 4 MEAN QFF PRESSURE IN HPA 1026.7 1022.7 1021.0 1018.4 1016.1 1009.1 1005.9 1007.2 1018.9 1023.1 1021.3 1028.9 1018.3 MAX. QFF PRESSURE IN HPA 1038.4 1037.6 1030.5 1028.6 1024.8 1014.5 1013.3 1012.5 1025.1 1030.0 1031.3 1047.0 1047.0 DAY 19 19 2 5 18 29 1 15 23 11 9 7 MIN. QFF PRESSURE IN HPA 1011.9 1008.9 1007.3 1010.0 1010.1 1003.0 999.8 999.9 1011.3 1017.3 1012.0 1010.4 999.8 DAY 16 1 7 23 5 3 31 1 8 14 17 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.9 864.8 865.5 866.4 865.5 862.0 860.7 862.1 869.4 870.9 866.4 868.4 865.8 MAX. QFE PRESSURE IN HPA 876.4 875.4 871.1 873.4 871.6 866.0 864.5 867.0 874.2 876.4 875.1 876.3 876.4 DAY 18 18 1 5 18 8 1 15 23 11 2 7 MIN. QFE PRESSURE IN HPA 855.8 855.7 853.5 858.1 859.3 858.6 856.2 856.2 864.6 867.2 858.8 854.0 853.5 DAY 16 1 12 2 1 3 30 1 2 17 17 3 MEAN QNH PRESSURE IN HPA 1024.9 1021.3 1022.0 1023.1 1022.1 1018.0 1016.6 1018.1 1026.5 1028.2 1023.1 1025.4 1022.4 MAX. QNH PRESSURE IN HPA 1034.5 1033.4 1028.5 1031.1 1029.0 1022.6 1020.9 1023.8 1032.0 1034.5 1033.0 1034.4 1034.5 DAY 18 18 1 5 18 8 1 15 23 11 2 7 MIN. QNH PRESSURE IN HPA 1011.0 1010.8 1008.3 1013.6 1015.0 1014.2 1011.4 1011.4 1021.0 1024.0 1014.4 1008.9 1008.3 DAY 16 1 12 2 1 3 30 1 2 17 17 3 MEAN QFF PRESSURE IN HPA 1028.0 1023.8 1021.5 1018.8 1015.9 1008.8 1005.7 1007.2 1019.2 1023.6 1021.9 1029.9 1018.7 MAX. QFF PRESSURE IN HPA 1039.8 1038.9 1031.0 1030.2 1024.3 1014.5 1013.5 1012.0 1025.9 1030.5 1031.6 1046.7 1046.7 DAY 18 18 2 5 18 29 1 15 23 11 9 7 MIN. QFF PRESSURE IN HPA 1014.5 1011.3 1007.1 1010.9 1010.0 1003.4 999.2 998.5 1011.5 1017.6 1013.2 1009.3 998.5 DAY 16 1 7 30 1 16 30 1 2 14 17 3 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 867.5 864.7 865.0 866.0 865.2 861.5 859.9 861.4 868.6 870.2 865.6 868.2 865.3 MAX. QFE PRESSURE IN HPA 876.5 875.8 871.2 872.6 870.4 865.1 864.0 866.2 873.2 875.3 874.1 875.9 876.5 DAY 9 18 1 5 18 8 1 15 23 11 2 7 MIN. QFE PRESSURE IN HPA 855.6 856.3 853.4 857.0 859.3 858.1 855.0 854.9 863.8 866.9 858.7 852.4 852.4 DAY 16 12 7 30 1 25 30 1 7 14 17 3 MEAN QNH PRESSURE IN HPA 1024.4 1021.1 1021.4 1022.6 1021.8 1017.5 1015.7 1017.3 1025.6 1027.4 1022.2 1025.1 1021.9 MAX. QNH PRESSURE IN HPA 1034.6 1033.8 1028.6 1030.2 1027.7 1021.6 1020.3 1022.9 1030.9 1033.3 1031.9 1034.0 1034.6 DAY 9 18 1 5 18 8 1 15 23 11 2 7 MIN. QNH PRESSURE IN HPA 1010.7 1011.5 1008.2 1012.3 1015.0 1013.6 1010.0 1009.9 1020.1 1023.7 1014.3 1007.1 1007.1 DAY 16 12 7 30 1 25 30 1 7 14 17 3 MEAN QFF PRESSURE IN HPA 1026.8 1023.0 1020.2 1017.8 1015.2 1008.3 1004.7 1006.0 1017.7 1022.1 1020.2 1029.0 1017.6 MAX. QFF PRESSURE IN HPA 1039.4 1039.1 1029.8 1028.6 1022.9 1013.4 1012.9 1011.1 1024.0 1028.6 1030.3 1044.9 1044.9 DAY 18 18 1 5 17 29 1 15 23 11 9 7 MIN. QFF PRESSURE IN HPA 1013.0 1011.3 1005.7 1006.6 1009.4 1003.1 997.2 996.4 1010.3 1016.1 1011.9 1007.9 996.4 DAY 16 12 7 30 5 16 30 1 1 1 17 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 866.4 863.6 863.8 865.1 864.2 860.5 858.5 859.9 867.3 869.1 864.7 867.3 864.2 MAX. QFE PRESSURE IN HPA 876.0 875.0 870.3 871.5 870.1 864.3 863.0 864.4 872.0 874.4 872.8 874.7 876.0 DAY 18 18 1 5 17 7 1 15 23 11 2 7 MIN. QFE PRESSURE IN HPA 855.8 855.7 854.0 854.9 858.0 856.7 853.9 854.2 862.0 865.4 858.8 852.0 852.0 DAY 16 13 7 1 4 25 30 1 7 14 17 3 MEAN QNH PRESSURE IN HPA 1023.1 1019.9 1020.1 1021.6 1020.6 1016.3 1014.0 1015.6 1024.2 1026.1 1021.1 1024.1 1020.6 MAX. QNH PRESSURE IN HPA 1034.1 1032.9 1027.6 1028.9 1027.3 1020.7 1019.2 1020.8 1029.5 1032.2 1030.4 1032.6 1034.1 DAY 18 18 1 5 17 7 1 15 23 11 2 7 MIN. QNH PRESSURE IN HPA 1011.0 1010.8 1008.9 1009.9 1013.5 1012.0 1008.8 1009.1 1018.1 1021.9 1014.4 1006.6 1006.6 DAY 16 13 7 1 4 25 30 1 7 14 17 3 MEAN QFF PRESSURE IN HPA 1025.3 1021.7 1018.9 1016.9 1014.2 1007.3 1003.1 1004.6 1016.4 1020.9 1019.2 1027.8 1016.4 MAX. QFF PRESSURE IN HPA 1039.0 1037.8 1028.8 1027.2 1022.9 1012.9 1011.4 1009.4 1022.7 1027.6 1029.1 1042.5 1042.5 DAY 18 18 1 5 17 29 1 15 23 11 9 7 MIN. QFF PRESSURE IN HPA 1012.0 1011.2 1007.0 1006.8 1007.8 1002.3 996.1 996.7 1008.7 1014.1 1011.9 1007.8 996.1 DAY 16 13 7 30 27 25 30 1 7 14 23 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.6 864.0 863.7 864.6 864.0 859.9 857.9 859.4 867.2 869.2 864.9 867.5 864.1 MAX. QFE PRESSURE IN HPA 876.5 875.2 870.0 870.8 870.2 864.2 862.5 864.0 871.6 873.9 872.0 874.4 876.5 DAY 18 18 1 5 17 7 1 15 23 11 2 7 MIN. QFE PRESSURE IN HPA 857.8 856.5 855.0 852.3 857.5 856.0 854.2 854.1 861.2 865.5 858.6 853.0 852.3 DAY 16 13 7 1 4 25 30 1 7 16 25 3 MEAN QNH PRESSURE IN HPA 1023.4 1020.3 1020.0 1021.1 1020.3 1015.7 1013.4 1015.1 1024.0 1026.2 1021.4 1024.3 1020.4 MAX. QNH PRESSURE IN HPA 1034.6 1033.2 1027.2 1028.1 1027.4 1020.6 1018.6 1020.3 1029.0 1031.7 1029.5 1032.2 1034.6 DAY 18 18 1 5 17 7 1 15 23 11 2 7 MIN. QNH PRESSURE IN HPA 1013.2 1011.8 1010.0 1007.0 1012.9 1011.2 1009.1 1009.0 1017.1 1022.1 1014.2 1007.7 1007.0 DAY 16 13 7 1 4 25 30 1 7 16 25 3 MEAN QFF PRESSURE IN HPA 1026.2 1022.9 1019.7 1017.1 1014.5 1007.1 1002.9 1004.8 1017.2 1022.2 1020.6 1029.0 1017.0 MAX. QFF PRESSURE IN HPA 1039.7 1038.4 1028.7 1026.9 1023.4 1013.2 1011.0 1009.9 1023.3 1029.0 1030.7 1044.5 1044.5 DAY 18 18 1 5 17 28 1 15 23 11 9 7 MIN. QFF PRESSURE IN HPA 1014.5 1012.9 1009.8 1003.7 1007.8 1001.9 997.5 997.8 1009.9 1015.9 1013.8 1009.9 997.5 DAY 16 13 6 1 4 25 30 1 7 14 25 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 867.1 864.7 864.5 865.5 865.0 860.9 858.8 860.4 868.1 869.9 865.5 868.0 864.9 MAX. QFE PRESSURE IN HPA 877.0 875.5 871.5 871.3 870.6 864.2 862.9 864.4 872.6 874.9 872.6 875.2 877.0 DAY 18 18 1 5 17 7 1 14 23 10 1 21 MIN. QFE PRESSURE IN HPA 856.2 856.6 853.0 855.1 859.0 858.0 854.9 856.2 861.9 866.1 858.0 853.5 853.0 DAY 31 11 11 1 4 25 30 10 7 16 25 3 MEAN QNH PRESSURE IN HPA 1023.9 1021.1 1020.9 1022.1 1021.4 1016.8 1014.4 1016.2 1025.0 1027.1 1022.1 1025.0 1021.3 MAX. QNH PRESSURE IN HPA 1035.2 1033.5 1028.9 1028.7 1027.9 1020.6 1019.1 1020.8 1030.2 1032.8 1030.2 1033.2 1035.2 DAY 18 18 1 5 17 7 1 14 23 10 1 21 MIN. QNH PRESSURE IN HPA 1011.4 1011.9 1007.7 1010.2 1014.6 1013.5 1009.9 1011.4 1017.9 1022.7 1013.5 1008.3 1007.7 DAY 31 11 11 1 4 25 30 10 7 16 25 3 MEAN QFF PRESSURE IN HPA 1026.9 1023.6 1020.3 1017.8 1015.1 1007.7 1003.4 1005.4 1017.7 1022.5 1020.9 1029.5 1017.6 MAX. QFF PRESSURE IN HPA 1040.3 1038.8 1031.1 1027.4 1023.6 1015.1 1010.5 1009.6 1024.0 1029.4 1031.5 1043.9 1043.9 DAY 18 18 1 5 17 28 2 15 23 11 9 6 MIN. QFF PRESSURE IN HPA 1010.9 1012.9 1007.0 1007.3 1009.2 1003.6 997.5 999.5 1009.4 1016.1 1012.6 1011.1 997.5 DAY 31 11 6 1 31 25 15 1 2 14 25 3 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 866.8 864.8 864.5 865.9 865.4 861.4 859.3 860.9 868.2 869.9 865.6 868.0 865.1 MAX. QFE PRESSURE IN HPA 876.8 875.1 870.8 871.3 870.9 864.6 863.5 865.6 872.4 875.0 873.2 875.2 876.8 DAY 18 18 1 5 17 7 1 14 23 10 1 6 MIN. QFE PRESSURE IN HPA 852.0 855.1 851.9 857.1 859.8 858.5 855.6 856.2 862.1 866.1 858.0 853.5 851.9 DAY 31 11 11 1 1 1 30 10 7 17 30 3 MEAN QNH PRESSURE IN HPA 1023.6 1021.3 1020.9 1022.5 1021.9 1017.3 1015.0 1016.8 1025.2 1027.1 1022.2 1024.9 1021.6 MAX. QNH PRESSURE IN HPA 1035.0 1033.0 1028.1 1028.7 1028.2 1021.0 1019.8 1022.2 1030.0 1032.9 1030.9 1033.2 1035.0 DAY 18 18 1 5 17 7 1 14 23 10 1 6 MIN. QNH PRESSURE IN HPA 1006.6 1010.2 1006.5 1012.4 1015.5 1014.0 1010.7 1011.4 1018.2 1022.7 1013.5 1008.3 1006.5 DAY 31 11 11 1 1 1 30 10 7 17 30 3 MEAN QFF PRESSURE IN HPA 1026.0 1023.2 1019.6 1017.7 1015.3 1008.2 1003.9 1005.6 1017.3 1021.8 1020.2 1028.8 1017.3 MAX. QFF PRESSURE IN HPA 1039.9 1037.8 1030.3 1026.8 1023.9 1015.0 1011.4 1009.9 1023.0 1028.3 1030.3 1044.2 1044.2 DAY 18 18 1 5 17 28 1 7 23 10 9 6 MIN. QFF PRESSURE IN HPA 1005.4 1009.7 1006.6 1009.0 1010.1 1002.9 998.1 998.6 1009.0 1015.3 1012.1 1010.6 998.1 DAY 31 11 6 30 31 16 31 1 7 14 30 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.0 2.9 7.4 11.3 16.8 20.7 24.7 25.5 20.7 12.7 7.4 1.3 12.9 MINIMUN AIR TEMPERATURE (C) -0.8 -1.1 1.8 5.8 10.1 13.3 16.1 16.0 12.5 5.5 1.9 -3.0 6.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 1 0 0 0 0 3 DAYS WITH MINIMUM TEMP. <=-4 5 6 0 0 0 0 0 0 0 0 6 13 30 DAYS WITH FREEZING MIN.<= 0 16 18 11 2 0 0 0 0 0 0 12 29 88 TEMPERATURE RECORDS LOWEST(C) -8.0 -5.0 -3.2 -0.4 5.4 10.4 10.0 13.0 5.6 1.4 -5.8 -9.0 -9.0 DAY 23 26 1 6 10 1 30 22 22 20 27 20 MAXIMUM AIR TEMPERATURE (C) 8.1 7.9 13.8 16.9 22.9 27.1 31.6 33.9 28.4 20.4 13.7 7.0 19.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 5 24 28 15 1 0 0 73 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.0 12.8 19.0 21.0 28.2 32.6 36.0 39.0 36.0 30.0 20.2 13.2 39.0 DAY 2 21 23 30 25 28 25 5 3 2 21 31 DIF. BETWEEN (MAX.-MIN.) (C) 8.9 9.0 12.0 11.1 12.8 13.8 15.5 17.9 15.9 14.9 11.8 10.0 12.8 MEAN DAILY TEMP. (MDT) (C) 3.7 3.4 7.8 11.4 16.5 20.2 23.9 25.0 20.4 13.0 7.8 2.0 12.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 16.7 88.8 122.9 33.9 0.2 0.0 0.0 262.5 HEATING DEG. DAYS(BASE 18 0C) 443.9 408.3 315.3 199.4 58.3 7.3 0.0 0.0 20.9 160.3 305.5 495.8 2415.0 DEWPOINT (MEAN C) -2.2 -2.8 -0.8 2.9 6.5 8.5 8.4 6.9 4.4 0.9 -2.8 -5.9 2.0 MIXING RATIO (G/KG) 3.83 3.69 4.28 5.61 7.19 8.27 8.51 7.76 6.34 4.81 3.90 2.92 5.59 VAPOUR PRESSURE (HPA) 5.30 5.11 5.90 7.72 9.89 11.31 11.58 10.60 8.71 6.66 5.40 4.06 7.69 SATURATION DEF. (HPA) 2.53 2.65 4.85 6.15 10.05 14.22 20.84 23.98 17.37 9.03 5.65 2.89 10.02 RELATIVE HUMIDITY (MEAN %) 71 68 59 60 54 51 40 36 40 49 53 62 54 RELATIVE HUMIDITY (MAX. %) 87 85 83 82 77 75 61 61 65 74 73 80 75 RELATIVE HUMIDITY (MIN. %) 50 49 37 40 34 30 24 18 20 26 31 40 33 RELATIVE HUMIDITY (MEAN% 03UTC) 81 81 77 78 73 72 57 57 59 68 67 75 70 RELATIVE HUMIDITY (MEAN% 09UTC) 60 61 45 45 39 36 31 26 29 31 40 49 41 RELATIVE HUMIDITY (MEAN% 15UTC) 62 59 45 48 43 35 26 21 28 38 46 55 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 50.2 44.6 32.3 102.3 20.4 45.1 0.0 0.0 8.8 0.0 33.6 13.2 350.5 DAYS WITH PRECIPITATION >=10 2 1 1 3 0 2 0 0 0 0 2 0 11 DAYS WITH PRECIPITATION >= 5 2 4 3 7 1 2 0 0 1 0 3 1 24 DAYS WITH PRECIPITATION >= 1 4 6 7 9 7 7 0 0 2 0 4 5 51 DAYS WITH PRECIPITATION 9 8 7 12 10 7 0 0 2 1 6 6 68 GREATEST DAILY PRECIPITATION 23.0 19.0 10.0 29.0 5.0 20.0 0.0 0.0 5.7 0.0 15.0 7.0 29.0 DAY 16 5 17 11 4 2 ** ** 29 ** 3 12 DAY WITH THUNDER STORM 0 0 0 2 6 4 0 0 1 0 0 0 13 DAYS WITH SNOW OR SLEET 3 4 1 0 0 0 0 0 0 0 1 6 15 DAYS WITH DUST 0 0 0 0 0 0 0 0 1 0 0 0 1 WIND DIRECTION (PREVAILING) 180 180 180 180 180 360 360 45 180 360 180 180 180 PREVAILING WIND SPEED(KNOTS) 10.7 8.9 10.3 10.4 9.3 6.4 6.4 6.5 10.6 5.5 10.4 9.0 10.2 PREVAILING WIND PERCENT 27.0 13.8 16.9 19.6 10.9 8.8 18.2 10.5 15.4 10.5 24.2 11.7 13.8 CALMS PERCENT OF WIND 60.5 74.6 64.5 61.7 66.5 70.8 57.1 59.9 60.0 69.0 61.3 79.4 65.4 NO. OF WIND OBSERVATION 248 224 248 240 248 240 247 247 240 248 240 247 2917 VECTOR WIND DIRECTION (MEAN) 192 191 203 201 210 253 7 219 200 188 192 184 200 VECTOR WIND MAGNITUDE(KNOTS) 3.6 1.3 3.4 3.3 1.8 0.8 1.1 0.7 1.9 0.6 3.6 1.1 1.7 WIND STEADINESES (MEAN %) 92.3 65.0 91.9 86.8 56.2 30.8 36.7 20.0 54.3 23.1 90.0 73.3 54.8 WIND SPEED (MEAN KNOTS) 3.9 2.0 3.7 3.8 3.2 2.6 3.0 3.5 3.5 2.6 4.0 1.5 3.1 FASTEST WIND DIRECTION 210 190 220 210 210 270 180 210 190 180 210 200 210 FASTEST WIND SPEED (KNOTS) 23 17 25 29 23 29 17 19 19 25 29 19 29 DAY 16 8 25 3 2 15 25 28 5 3 11 22 DAYS WITH SKY CLEAR (0-2)/8 20 12 16 11 20 24 31 31 23 26 24 18 256 DAYS WITH P.CLOUDY (3-6)/8 6 10 11 13 9 4 0 0 7 5 5 4 74 DAYS WITH CLOUDY (7-8)/8 5 6 4 6 2 2 0 0 0 0 1 9 35 DAYS WITH VISIBILITY =< 2 KM 0 1 0 0 0 0 1 0 0 0 0 0 2 DURATION OF SUNSHINE HOURS 171.2 152.7 235.6 ****** ****** 227.7 385.3 327.4 277.0 266.2 220.7 162.4 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 868.0 866.1 865.1 864.0 866.1 862.8 858.8 861.0 864.3 868.3 867.5 868.7 865.1 MAX. QFE PRESSURE IN HPA 875.5 872.4 875.0 870.0 870.7 867.8 863.1 866.4 871.0 877.4 875.7 873.3 877.4 DAY-HOUR 7- 0 12- 6 3- 6 7- 0 22- 6 2- 6 4- 6 20- 6 13- 6 25- 6 15-18 10- 9 MIN. QFE PRESSURE IN HPA 857.5 853.4 855.7 855.4 857.9 854.1 853.8 856.2 857.1 861.5 859.3 864.3 853.4 DAY-HOUR 16-18 5- 3 25- 3 19- 9 2- 9 29- 0 16-15 3-15 19-15 3-12 23-21 4-12 MEAN QNH PRESSURE IN HPA 1024.9 1022.8 1021.6 1020.3 1022.8 1019.0 1014.4 1017.0 1020.7 1025.2 1024.3 1025.7 1021.6 MAX. QNH PRESSURE IN HPA 1033.5 1030.0 1032.9 1027.2 1028.0 1024.7 1019.3 1023.1 1028.4 1035.7 1033.7 1031.0 1035.7 DAY-HOUR 7- 0 12- 6 3- 6 7- 0 22- 6 2- 6 4- 6 20- 6 13- 6 25- 6 15-18 10- 9 MIN. QNH PRESSURE IN HPA 1012.9 1008.2 1010.8 1010.5 1013.4 1009.0 1008.7 1011.4 1012.4 1017.5 1015.0 1020.7 1008.2 DAY-HOUR 16-18 5- 3 25- 3 19- 9 2- 9 29- 0 16-15 3-15 19-15 3-12 23-21 4-12 MEAN QFF PRESSURE IN HPA 1026.9 1024.7 1020.7 1017.0 1016.3 1010.2 1003.4 1005.6 1012.1 1021.3 1023.6 1028.8 1017.6 MAX. QFF PRESSURE IN HPA 1036.9 1033.8 1034.4 1027.1 1024.7 1018.9 1009.2 1013.1 1023.8 1033.4 1035.6 1037.4 1037.4 DAY-HOUR 6-18 12- 6 3- 6 6- 6 12-15 2- 6 4- 3 20- 6 22- 3 25- 6 15-18 20- 6 MIN. QFF PRESSURE IN HPA 1013.8 1009.3 1006.4 1006.1 1006.0 995.8 997.6 999.8 1001.8 1008.4 1011.2 1022.3 995.8 DAY-HOUR 16-21 4-21 25- 3 19- 9 2- 9 29- 0 16-12 7-12 4-12 3- 9 23-12 4-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 868.1 866.0 865.0 864.0 866.1 862.9 858.9 861.0 864.4 868.4 867.5 868.8 865.1 MAX. QFE PRESSURE IN HPA 875.5 871.0 873.2 870.0 869.4 866.9 862.7 864.5 870.4 875.8 874.8 872.6 875.8 DAY 7 13 3 7 22 1 4 25 22 25 16 20 MIN. QFE PRESSURE IN HPA 861.1 853.9 856.8 857.0 860.0 854.1 855.3 858.4 858.7 863.0 860.1 865.0 853.9 DAY 17 5 17 19 2 29 16 16 20 11 24 4 MEAN QNH PRESSURE IN HPA 1025.0 1022.7 1021.5 1020.4 1022.7 1019.1 1014.5 1016.9 1020.9 1025.4 1024.3 1025.8 1021.6 MAX. QNH PRESSURE IN HPA 1033.5 1028.4 1030.9 1027.2 1026.5 1023.7 1018.9 1020.9 1027.7 1033.8 1032.7 1030.2 1033.8 DAY 7 13 3 7 22 1 4 25 22 25 16 20 MIN. QNH PRESSURE IN HPA 1017.0 1008.8 1012.1 1012.3 1015.8 1009.0 1010.4 1013.9 1014.3 1019.2 1015.9 1021.5 1008.8 DAY 17 5 17 19 2 29 16 16 20 11 24 4 MEAN QFF PRESSURE IN HPA 1026.4 1024.2 1020.2 1016.8 1016.2 1010.4 1003.4 1005.5 1011.8 1020.9 1023.0 1028.3 1017.3 MAX. QFF PRESSURE IN HPA 1035.4 1030.4 1031.6 1026.5 1022.1 1016.7 1008.7 1011.2 1023.4 1031.0 1033.4 1035.7 1035.7 DAY 7 14 3 7 13 1 4 25 22 26 16 20 MIN. QFF PRESSURE IN HPA 1017.2 1010.3 1008.7 1006.6 1009.7 995.8 999.2 1001.4 1002.5 1011.6 1012.5 1023.5 995.8 DAY 11 5 25 19 6 29 16 7 4 11 24 4 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 868.0 865.9 865.1 864.2 866.4 863.2 859.7 861.8 864.7 868.6 867.4 868.7 865.3 MAX. QFE PRESSURE IN HPA 875.1 871.3 874.0 869.2 870.2 866.7 862.9 865.4 870.1 876.0 873.8 872.3 876.0 DAY 7 13 3 7 22 1 4 20 13 25 16 10 MIN. QFE PRESSURE IN HPA 861.1 853.4 855.7 856.7 858.0 854.7 855.5 858.7 858.7 862.7 859.8 864.7 853.4 DAY 11 5 25 19 2 29 16 8 20 11 11 4 MEAN QNH PRESSURE IN HPA 1024.9 1022.5 1021.6 1020.6 1023.1 1019.4 1015.4 1017.8 1021.2 1025.6 1024.3 1025.7 1021.8 MAX. QNH PRESSURE IN HPA 1033.0 1028.7 1031.8 1026.3 1027.4 1023.4 1019.1 1021.9 1027.3 1034.1 1031.6 1029.8 1034.1 DAY 7 13 3 7 22 1 4 20 13 25 16 10 MIN. QNH PRESSURE IN HPA 1017.0 1008.2 1010.8 1012.0 1013.5 1009.7 1010.6 1014.3 1014.3 1018.9 1015.5 1021.1 1008.2 DAY 11 5 25 19 2 29 16 8 20 11 11 4 MEAN QFF PRESSURE IN HPA 1027.5 1024.9 1021.3 1017.9 1017.3 1011.1 1004.8 1007.1 1013.4 1022.4 1024.3 1029.5 1018.5 MAX. QFF PRESSURE IN HPA 1035.7 1032.1 1034.3 1026.0 1024.5 1018.0 1009.2 1012.0 1023.8 1032.4 1034.0 1037.4 1037.4 DAY 7 12 3 6 13 1 4 20 22 27 16 20 MIN. QFF PRESSURE IN HPA 1017.5 1009.8 1006.4 1007.7 1007.1 997.1 999.5 1002.2 1004.1 1010.1 1012.8 1024.9 997.1 DAY 11 5 25 3 2 29 16 6 4 3 11 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 868.8 866.9 865.9 864.8 866.9 863.6 860.0 862.2 865.3 869.4 868.2 869.5 866.0 MAX. QFE PRESSURE IN HPA 875.1 872.4 875.0 869.8 870.7 867.8 863.1 866.4 871.0 877.4 875.3 873.0 877.4 DAY 7 12 3 7 22 2 4 20 13 25 15 10 MIN. QFE PRESSURE IN HPA 862.8 854.3 857.6 855.8 858.4 854.6 855.6 859.5 860.0 862.7 860.3 865.7 854.3 DAY 11 5 17 19 2 29 16 3 4 11 11 4 MEAN QNH PRESSURE IN HPA 1025.9 1023.6 1022.5 1021.2 1023.7 1019.8 1015.8 1018.3 1021.9 1026.5 1025.1 1026.6 1022.6 MAX. QNH PRESSURE IN HPA 1033.0 1030.0 1032.9 1027.0 1028.0 1024.7 1019.3 1023.1 1028.4 1035.7 1033.3 1030.6 1035.7 DAY 7 12 3 7 22 2 4 20 13 25 15 10 MIN. QNH PRESSURE IN HPA 1019.0 1009.2 1013.0 1011.0 1013.9 1009.6 1010.7 1015.2 1015.8 1018.9 1016.1 1022.3 1009.2 DAY 11 5 17 19 2 29 16 3 4 11 11 4 MEAN QFF PRESSURE IN HPA 1028.4 1025.9 1022.1 1018.0 1017.1 1010.9 1004.7 1006.8 1013.4 1022.7 1024.7 1030.4 1018.8 MAX. QFF PRESSURE IN HPA 1036.2 1033.8 1034.4 1027.1 1022.5 1018.9 1009.0 1013.1 1022.6 1033.4 1034.2 1037.4 1037.4 DAY 7 12 3 6 13 2 7 20 22 25 16 20 MIN. QFF PRESSURE IN HPA 1019.6 1010.9 1009.6 1006.7 1006.7 997.5 998.7 1001.6 1003.8 1009.2 1014.1 1025.7 997.5 DAY 11 5 25 19 2 29 16 7 4 3 11 12 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 868.3 866.7 865.5 864.3 866.4 863.0 859.3 861.5 864.7 868.5 867.5 869.0 865.4 MAX. QFE PRESSURE IN HPA 874.7 872.2 873.9 869.5 870.0 866.8 862.4 865.7 870.3 876.5 874.3 873.3 876.5 DAY 7 12 3 6 22 1 3 24 13 25 15 10 MIN. QFE PRESSURE IN HPA 861.1 856.0 858.5 855.4 857.9 854.6 855.1 858.6 858.8 862.0 861.5 865.2 854.6 DAY 11 5 17 19 2 29 16 3 19 3 23 4 MEAN QNH PRESSURE IN HPA 1025.2 1023.4 1022.1 1020.7 1023.1 1019.2 1015.0 1017.5 1021.1 1025.5 1024.4 1026.1 1021.9 MAX. QNH PRESSURE IN HPA 1032.6 1029.7 1031.7 1026.6 1027.2 1023.5 1018.5 1022.3 1027.6 1034.6 1032.1 1031.0 1034.6 DAY 7 12 3 6 22 1 3 24 13 25 15 10 MIN. QNH PRESSURE IN HPA 1017.0 1011.2 1014.0 1010.5 1013.4 1009.6 1010.2 1014.2 1014.4 1018.1 1017.5 1021.7 1009.6 DAY 11 5 17 19 2 29 16 3 19 3 23 4 MEAN QFF PRESSURE IN HPA 1026.7 1024.8 1020.8 1017.0 1016.2 1010.2 1003.8 1005.7 1012.0 1021.0 1023.1 1028.7 1017.5 MAX. QFF PRESSURE IN HPA 1035.5 1031.9 1032.1 1025.9 1021.3 1017.2 1008.5 1011.8 1021.6 1032.1 1032.4 1036.2 1036.2 DAY 7 13 3 6 13 2 3 24 21 25 27 19 MIN. QFF PRESSURE IN HPA 1017.7 1012.9 1011.8 1006.1 1006.0 997.8 998.1 1001.1 1002.0 1008.4 1013.1 1024.0 997.8 DAY 10 5 25 19 2 29 16 7 4 3 23 31 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 867.2 865.6 864.2 863.2 865.5 862.3 858.1 860.2 863.3 867.3 866.7 867.8 864.3 MAX. QFE PRESSURE IN HPA 873.6 871.0 872.2 867.2 869.5 865.7 861.7 863.8 869.3 874.8 874.0 872.2 874.8 DAY 6 13 3 12 22 1 3 24 21 25 15 19 MIN. QFE PRESSURE IN HPA 860.7 855.8 856.7 857.6 859.0 855.0 853.9 856.9 857.3 861.5 860.1 864.3 853.9 DAY 11 5 16 19 2 29 16 3 19 3 23 4 MEAN QNH PRESSURE IN HPA 1024.0 1022.2 1020.6 1019.5 1022.1 1018.4 1013.5 1015.9 1019.6 1024.1 1023.5 1024.7 1020.7 MAX. QNH PRESSURE IN HPA 1031.3 1028.4 1029.7 1024.0 1026.6 1022.3 1017.7 1020.1 1026.4 1032.7 1031.8 1029.7 1032.7 DAY 6 13 3 12 22 1 3 24 21 25 15 19 MIN. QNH PRESSURE IN HPA 1016.6 1011.0 1012.0 1013.0 1014.6 1010.0 1008.8 1012.2 1012.7 1017.5 1015.9 1020.7 1008.8 DAY 11 5 16 19 2 29 16 3 19 3 23 4 MEAN QFF PRESSURE IN HPA 1025.3 1023.6 1019.2 1015.9 1015.5 1009.7 1002.4 1004.4 1010.6 1019.7 1022.2 1027.2 1016.3 MAX. QFF PRESSURE IN HPA 1033.5 1030.1 1029.9 1023.2 1020.0 1016.8 1008.1 1010.3 1022.1 1029.5 1031.5 1034.8 1034.8 DAY 7 12 3 6 13 3 3 24 21 26 15 19 MIN. QFF PRESSURE IN HPA 1016.7 1013.7 1010.1 1008.3 1008.4 997.7 997.6 999.8 1001.8 1008.5 1011.2 1022.3 997.6 DAY 10 5 16 19 2 29 16 7 4 3 23 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.5 865.8 864.3 863.2 865.4 861.9 857.5 859.8 863.3 867.4 867.1 868.2 864.3 MAX. QFE PRESSURE IN HPA 874.0 871.1 871.7 867.7 869.7 866.3 861.1 863.2 869.6 874.7 874.0 872.3 874.7 DAY 6 13 2 6 12 2 3 24 21 25 15 9 MIN. QFE PRESSURE IN HPA 859.8 856.7 855.9 859.1 859.9 855.6 853.8 856.2 857.1 862.0 860.0 864.7 853.8 DAY 16 5 16 2 2 29 16 3 19 3 23 4 MEAN QNH PRESSURE IN HPA 1024.4 1022.4 1020.7 1019.5 1021.9 1017.9 1012.9 1015.5 1019.5 1024.2 1023.9 1025.1 1020.7 MAX. QNH PRESSURE IN HPA 1031.8 1028.5 1029.2 1024.6 1026.9 1023.0 1017.0 1019.4 1026.7 1032.6 1031.8 1029.8 1032.6 DAY 6 13 2 6 12 2 3 24 21 25 15 9 MIN. QNH PRESSURE IN HPA 1015.5 1012.0 1011.1 1014.7 1015.6 1010.7 1008.7 1011.4 1012.4 1018.1 1015.8 1021.1 1008.7 DAY 16 5 16 2 2 29 16 3 19 3 23 4 MEAN QFF PRESSURE IN HPA 1026.8 1024.7 1020.3 1016.7 1016.1 1009.6 1002.3 1004.9 1011.8 1021.1 1024.0 1028.9 1017.3 MAX. QFF PRESSURE IN HPA 1034.8 1031.1 1030.8 1024.4 1024.7 1018.2 1007.5 1009.7 1022.3 1030.8 1034.4 1036.3 1036.3 DAY 6 12 2 6 12 2 3 24 21 25 15 19 MIN. QFF PRESSURE IN HPA 1017.6 1014.5 1009.3 1009.8 1008.8 999.4 998.2 1000.6 1003.3 1009.6 1011.5 1025.2 998.2 DAY 16 4 16 2 2 29 15 3 4 3 23 31 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 868.2 866.1 865.1 864.1 866.2 862.6 858.3 860.8 864.3 868.3 867.8 868.7 865.0 MAX. QFE PRESSURE IN HPA 875.2 871.0 872.7 868.9 869.6 866.0 861.8 864.0 870.0 875.1 875.7 872.9 875.7 DAY 6 1 2 6 12 2 3 24 21 26 15 19 MIN. QFE PRESSURE IN HPA 857.5 857.8 855.8 860.3 860.7 856.2 855.0 857.1 858.2 863.0 860.1 864.9 855.0 DAY 16 4 16 18 4 28 16 3 19 3 23 25 MEAN QNH PRESSURE IN HPA 1025.1 1022.8 1021.6 1020.4 1022.8 1018.7 1013.8 1016.7 1020.7 1025.3 1024.6 1025.8 1021.5 MAX. QNH PRESSURE IN HPA 1033.2 1028.4 1030.3 1025.9 1026.7 1022.6 1017.8 1020.3 1027.2 1033.0 1033.7 1030.5 1033.7 DAY 6 1 2 6 12 2 3 24 21 26 15 19 MIN. QNH PRESSURE IN HPA 1012.9 1013.2 1011.0 1016.1 1016.6 1011.4 1010.0 1012.4 1013.7 1019.2 1015.9 1021.4 1010.0 DAY 16 4 16 18 4 28 16 3 19 3 23 25 MEAN QFF PRESSURE IN HPA 1027.7 1025.2 1021.1 1017.2 1016.1 1009.8 1002.7 1005.2 1012.2 1021.5 1024.3 1029.5 1017.7 MAX. QFF PRESSURE IN HPA 1036.9 1032.1 1031.8 1025.4 1021.8 1017.0 1007.8 1010.2 1023.2 1031.2 1035.6 1037.2 1037.2 DAY 6 12 2 6 12 2 3 24 21 26 15 19 MIN. QFF PRESSURE IN HPA 1014.6 1012.6 1008.1 1010.9 1010.5 1000.0 998.6 1000.4 1003.6 1010.7 1011.6 1025.3 998.6 DAY 16 4 16 2 4 28 16 3 3 3 23 31 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 868.2 866.2 865.4 864.2 866.4 863.0 858.8 861.3 864.5 868.5 867.7 868.8 865.3 MAX. QFE PRESSURE IN HPA 875.2 871.2 873.2 869.2 869.8 866.2 862.5 864.1 870.4 875.5 874.5 872.9 875.5 DAY 6 13 2 6 12 1 3 31 21 25 15 19 MIN. QFE PRESSURE IN HPA 857.5 855.5 858.0 857.4 860.8 856.0 855.5 857.6 858.5 862.6 859.3 865.0 855.5 DAY 16 4 16 18 5 28 16 3 19 10 23 25 MEAN QNH PRESSURE IN HPA 1025.2 1022.8 1021.9 1020.6 1023.1 1019.2 1014.4 1017.2 1020.9 1025.5 1024.6 1025.8 1021.8 MAX. QNH PRESSURE IN HPA 1033.2 1028.6 1030.9 1026.3 1027.0 1022.9 1018.6 1020.5 1027.7 1033.5 1032.4 1030.5 1033.5 DAY 6 13 2 6 12 1 3 31 21 25 15 19 MIN. QNH PRESSURE IN HPA 1012.9 1010.6 1013.5 1012.8 1016.7 1011.2 1010.6 1013.0 1014.0 1018.7 1015.0 1021.5 1010.6 DAY 16 4 16 18 5 28 16 3 19 10 23 25 MEAN QFF PRESSURE IN HPA 1026.6 1024.3 1020.6 1016.8 1016.1 1010.1 1003.2 1005.5 1011.9 1021.1 1023.4 1028.4 1017.3 MAX. QFF PRESSURE IN HPA 1035.2 1031.3 1031.8 1025.4 1021.7 1016.4 1008.5 1010.5 1023.3 1031.3 1033.0 1036.4 1036.4 DAY 6 13 2 6 12 2 3 24 21 25 15 19 MIN. QFF PRESSURE IN HPA 1013.8 1009.3 1011.5 1007.3 1010.2 998.8 999.0 1002.0 1002.8 1012.3 1012.0 1023.3 998.8 DAY 16 4 24 18 5 28 16 3 3 3 23 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.3 3.4 4.9 10.9 18.2 21.4 25.9 25.7 22.2 13.9 6.5 6.3 13.3 MINIMUN AIR TEMPERATURE (C) -2.9 -0.1 1.2 6.0 11.3 13.7 18.1 16.7 14.0 7.7 0.6 2.7 7.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 4 0 1 0 0 0 5 DAYS WITH MINIMUM TEMP. <=-4 12 5 0 0 0 0 0 0 0 0 4 0 21 DAYS WITH FREEZING MIN.<= 0 24 14 11 1 0 0 0 0 0 2 14 8 74 TEMPERATURE RECORDS LOWEST(C) -10.8 -5.6 -3.2 0.0 8.0 9.6 14.2 13.2 9.0 0.0 -4.2 -2.2 -10.8 DAY 22 3 17 6 1 7 15 24 23 28 12 1 MAXIMUM AIR TEMPERATURE (C) 3.2 7.8 9.5 16.4 24.1 27.8 32.5 33.6 29.8 20.6 13.3 11.2 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 9 25 29 17 0 0 0 81 DAYS WITH MAXIMUM TEMP. <= 0 8 2 0 0 0 0 0 0 0 0 0 0 10 TEMPERATURE RECORDS HIGHEST(C) 12.8 14.6 18.4 24.0 30.0 35.0 38.0 37.0 35.0 29.8 17.4 15.4 38.0 DAY 1 25 30 30 27 30 31 5 15 3 21 27 DIF. BETWEEN (MAX.-MIN.) (C) 6.1 7.9 8.3 10.4 12.8 14.1 14.4 16.9 15.8 12.9 12.7 8.5 11.7 MEAN DAILY TEMP. (MDT) (C) 0.2 3.9 5.3 11.2 17.7 20.7 25.3 25.1 21.9 14.1 7.0 7.0 13.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 2.4 23.3 132.9 127.8 47.3 0.0 0.0 0.0 333.7 HEATING DEG. DAYS(BASE 18 0C) 552.7 410.2 392.6 203.3 37.6 2.6 0.0 0.0 6.1 124.2 331.0 341.5 2401.8 DEWPOINT (MEAN C) -5.5 -2.5 -0.4 1.0 6.2 4.7 9.2 5.2 2.6 2.1 -0.6 -0.2 1.8 MIXING RATIO (G/KG) 3.04 3.80 4.37 4.96 7.09 6.40 8.82 6.83 5.53 5.29 4.37 4.45 5.41 VAPOUR PRESSURE (HPA) 4.21 5.25 6.01 6.83 9.75 8.78 12.05 9.35 7.60 7.31 6.07 6.16 7.45 SATURATION DEF. (HPA) 2.00 2.87 2.92 6.68 12.08 17.88 22.59 25.37 20.57 9.50 4.11 3.62 10.85 RELATIVE HUMIDITY (MEAN %) 69 68 70 54 51 37 38 31 32 50 64 65 52 RELATIVE HUMIDITY (MAX. %) 81 83 89 76 75 57 59 50 54 72 84 80 72 RELATIVE HUMIDITY (MIN. %) 55 51 52 34 32 23 22 17 16 29 40 45 35 RELATIVE HUMIDITY (MEAN% 03UTC) 77 79 84 70 71 55 57 49 52 67 83 77 68 RELATIVE HUMIDITY (MEAN% 09UTC) 62 62 61 43 40 28 29 21 20 37 46 53 42 RELATIVE HUMIDITY (MEAN% 15UTC) 66 60 61 44 37 25 27 21 21 40 55 63 43 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 94.5 66.0 58.8 84.3 30.3 0.2 7.2 3.0 1.0 34.0 4.0 32.4 415.7 DAYS WITH PRECIPITATION >=10 2 2 1 4 1 0 0 0 0 1 0 2 13 DAYS WITH PRECIPITATION >= 5 7 4 3 6 3 0 0 0 0 1 0 2 26 DAYS WITH PRECIPITATION >= 1 11 8 12 8 6 0 3 1 1 3 2 5 60 DAYS WITH PRECIPITATION 14 12 15 10 7 1 5 1 1 6 2 8 82 GREATEST DAILY PRECIPITATION 25.0 18.0 18.8 23.4 10.0 0.2 3.0 3.0 1.0 29.0 3.0 13.7 29.0 DAY 6 2 18 12 20 4 18 29 22 16 6 29 DAY WITH THUNDER STORM 0 1 1 4 3 2 1 1 0 0 0 0 13 DAYS WITH SNOW OR SLEET 11 5 6 0 0 0 0 0 0 0 0 0 22 DAYS WITH DUST 0 1 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 180 180 180 180 225 360 45 360 180 180 45 180 180 PREVAILING WIND SPEED(KNOTS) 8.3 9.5 9.5 9.7 11.5 6.5 6.0 5.3 9.2 11.3 5.5 9.7 9.7 PREVAILING WIND PERCENT 7.7 18.1 23.0 29.6 13.3 17.5 16.5 10.9 22.5 19.8 4.6 29.8 15.5 CALMS PERCENT OF WIND 75.4 65.5 52.8 43.3 58.9 52.5 64.1 64.9 56.7 60.1 89.6 56.9 61.7 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 208 192 196 194 204 217 23 228 200 195 11 189 196 VECTOR WIND MAGNITUDE(KNOTS) 0.8 2.0 2.9 3.4 2.1 0.7 1.6 0.4 3.0 3.0 0.2 3.8 1.7 WIND STEADINESES (MEAN %) 47.1 62.5 74.4 65.4 61.8 18.9 72.7 16.0 76.9 73.2 28.6 95.0 53.1 WIND SPEED (MEAN KNOTS) 1.7 3.2 3.9 5.2 3.4 3.7 2.2 2.5 3.9 4.1 0.7 4.0 3.2 FASTEST WIND DIRECTION 180 220 180 210 200 210 180 210 180 220 180 190 220 FASTEST WIND SPEED (KNOTS) 17 25 21 25 25 23 14 19 21 29 16 25 29 DAY 6 9 29 8 16 1 11 21 4 25 2 29 DAYS WITH SKY CLEAR (0-2)/8 7 6 7 12 17 27 26 31 27 22 20 11 213 DAYS WITH P.CLOUDY (3-6)/8 11 13 13 11 8 3 5 0 3 8 8 11 94 DAYS WITH CLOUDY (7-8)/8 13 10 11 7 6 0 0 0 0 1 2 9 59 DAYS WITH VISIBILITY =< 2 KM 0 0 1 0 0 0 0 1 0 0 0 0 2 DURATION OF SUNSHINE HOURS 102.0 127.7 146.8 196.8 278.0 364.6 359.2 332.7 275.6 250.6 205.7 143.4 2783.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.8 864.3 862.0 864.0 864.8 862.4 862.3 862.0 863.2 867.0 870.8 867.7 864.8 MAX. QFE PRESSURE IN HPA 875.1 871.0 868.6 872.1 871.2 868.2 868.6 870.0 870.0 874.3 879.6 872.7 879.6 DAY-HOUR 26- 6 24- 6 29- 6 4- 6 3-21 12- 0 3- 6 29- 6 30-21 18-15 18- 6 4- 6 MIN. QFE PRESSURE IN HPA 857.2 854.4 853.4 851.7 858.8 856.7 855.1 855.9 855.3 860.0 863.8 861.4 851.7 DAY-HOUR 6-12 1-18 7-12 12-18 28-18 19- 0 6-15 7-15 21-21 26-18 6-12 29- 9 MEAN QNH PRESSURE IN HPA 1023.5 1020.7 1018.0 1020.4 1021.2 1018.5 1018.4 1018.0 1019.4 1023.8 1028.1 1024.6 1021.2 MAX. QNH PRESSURE IN HPA 1033.0 1028.4 1025.6 1029.6 1028.6 1025.2 1025.6 1027.2 1027.2 1032.1 1038.2 1030.3 1038.2 DAY-HOUR 26- 6 24- 6 29- 6 4- 6 3-21 12- 0 3- 6 29- 6 30-21 18-15 18- 6 4- 6 MIN. QNH PRESSURE IN HPA 1012.6 1009.4 1008.2 1006.3 1014.4 1012.0 1010.2 1011.1 1010.4 1015.8 1020.1 1017.4 1006.3 DAY-HOUR 6-12 1-18 7-12 12-18 28-18 19- 0 6-15 7-15 21-21 26-18 6-12 29- 9 MEAN QFF PRESSURE IN HPA 1027.5 1022.3 1018.6 1017.4 1013.9 1009.5 1006.8 1006.7 1010.1 1019.1 1028.0 1024.4 1017.0 MAX. QFF PRESSURE IN HPA 1039.0 1033.2 1026.8 1031.3 1021.0 1018.9 1014.6 1017.3 1019.0 1030.5 1041.9 1032.3 1041.9 DAY-HOUR 26- 6 3- 6 28-18 4- 6 3-21 12- 3 3- 6 29- 6 24- 6 18-15 18- 6 4- 6 MIN. QFF PRESSURE IN HPA 1014.6 1009.7 1008.4 1002.1 1004.7 1000.3 999.0 999.8 1001.6 1010.2 1016.1 1016.3 999.0 DAY-HOUR 6- 6 9-12 7-15 12-18 28-15 18-21 6-15 8-12 21-21 26-18 6- 9 29- 6 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 866.8 864.2 861.7 864.0 864.8 862.6 862.5 862.1 863.3 867.0 870.9 867.7 864.8 MAX. QFE PRESSURE IN HPA 874.7 869.4 867.9 871.2 869.1 868.2 868.0 868.3 868.8 873.7 878.7 872.0 878.7 DAY 26 24 29 4 4 12 4 29 26 19 16 4 MIN. QFE PRESSURE IN HPA 859.8 856.9 855.6 852.6 860.0 856.7 857.8 857.5 856.4 860.1 866.0 862.2 852.6 DAY 6 2 2 13 29 19 7 8 22 27 2 14 MEAN QNH PRESSURE IN HPA 1023.5 1020.5 1017.7 1020.3 1021.3 1018.8 1018.6 1018.2 1019.5 1023.8 1028.3 1024.6 1021.3 MAX. QNH PRESSURE IN HPA 1032.6 1026.5 1024.8 1028.6 1026.2 1025.2 1024.9 1025.3 1025.8 1031.4 1037.2 1029.5 1037.2 DAY 26 24 29 4 4 12 4 29 26 19 16 4 MIN. QNH PRESSURE IN HPA 1015.5 1012.2 1010.7 1007.3 1015.8 1012.0 1013.2 1012.9 1011.6 1015.9 1022.6 1018.3 1007.3 DAY 6 2 2 13 29 19 7 8 22 27 2 14 MEAN QFF PRESSURE IN HPA 1027.1 1021.7 1018.0 1017.3 1013.9 1009.7 1007.1 1006.6 1009.8 1018.6 1027.5 1024.0 1016.8 MAX. QFF PRESSURE IN HPA 1036.5 1030.7 1025.3 1030.5 1019.2 1017.5 1013.5 1014.4 1017.7 1028.8 1039.3 1030.2 1039.3 DAY 26 4 29 4 22 12 4 30 25 19 18 4 MIN. QFF PRESSURE IN HPA 1015.8 1012.3 1011.4 1004.4 1007.1 1000.6 1001.0 1001.5 1002.9 1011.4 1018.4 1017.0 1000.6 DAY 6 9 25 13 25 19 29 8 8 14 6 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.5 864.2 861.8 864.2 865.0 863.0 863.2 862.7 863.6 867.2 871.0 867.6 865.0 MAX. QFE PRESSURE IN HPA 874.7 869.4 868.2 870.9 868.4 868.2 867.8 869.1 869.5 873.7 879.0 872.3 879.0 DAY 26 24 29 4 4 12 3 29 26 19 18 4 MIN. QFE PRESSURE IN HPA 858.6 857.0 854.2 854.0 860.3 858.0 858.2 857.6 857.6 860.6 866.2 862.2 854.0 DAY 6 9 2 13 29 4 7 8 22 27 2 14 MEAN QNH PRESSURE IN HPA 1023.2 1020.5 1017.8 1020.5 1021.5 1019.2 1019.4 1018.9 1019.9 1024.0 1028.3 1024.5 1021.5 MAX. QNH PRESSURE IN HPA 1032.6 1026.5 1025.2 1028.2 1025.4 1025.2 1024.7 1026.2 1026.6 1031.4 1037.5 1029.8 1037.5 DAY 26 24 29 4 4 12 3 29 26 19 18 4 MIN. QNH PRESSURE IN HPA 1014.2 1012.3 1009.1 1008.9 1016.1 1013.5 1013.7 1013.0 1013.0 1016.5 1022.9 1018.3 1008.9 DAY 6 9 2 13 29 4 7 8 22 27 2 14 MEAN QFF PRESSURE IN HPA 1027.6 1022.5 1018.7 1018.2 1014.9 1010.8 1008.4 1008.3 1011.5 1020.1 1029.0 1024.9 1017.9 MAX. QFF PRESSURE IN HPA 1038.1 1031.3 1026.2 1030.3 1020.1 1018.9 1013.7 1016.3 1018.5 1030.1 1041.3 1031.9 1041.3 DAY 26 3 29 4 7 12 4 29 25 19 18 4 MIN. QFF PRESSURE IN HPA 1015.1 1010.3 1010.0 1005.0 1007.4 1002.5 1002.9 1001.7 1004.0 1013.0 1020.0 1018.1 1001.7 DAY 6 9 2 13 28 4 29 8 8 26 6 14 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.4 865.2 862.8 864.8 865.6 863.3 863.5 863.1 864.1 868.1 871.8 868.4 865.7 MAX. QFE PRESSURE IN HPA 875.1 871.0 868.6 872.1 868.6 868.2 868.6 870.0 869.4 874.1 879.6 872.7 879.6 DAY 26 24 29 4 7 12 3 29 25 18 18 4 MIN. QFE PRESSURE IN HPA 857.8 857.5 856.2 856.6 860.3 859.1 858.7 858.0 859.1 862.5 866.5 862.2 856.2 DAY 6 9 2 13 29 18 7 8 21 27 6 29 MEAN QNH PRESSURE IN HPA 1024.2 1021.7 1018.9 1021.3 1022.1 1019.6 1019.7 1019.4 1020.5 1025.1 1029.3 1025.4 1022.3 MAX. QNH PRESSURE IN HPA 1033.0 1028.4 1025.6 1029.6 1025.6 1025.2 1025.6 1027.2 1026.5 1031.9 1038.2 1030.3 1038.2 DAY 26 24 29 4 7 12 3 29 25 18 18 4 MIN. QNH PRESSURE IN HPA 1013.2 1012.9 1011.4 1011.9 1016.1 1014.7 1014.3 1013.5 1014.7 1018.6 1023.2 1018.3 1011.4 DAY 6 9 2 13 29 18 7 8 21 27 6 29 MEAN QFF PRESSURE IN HPA 1028.6 1023.6 1019.7 1018.5 1014.7 1010.4 1008.1 1007.9 1011.1 1020.5 1029.8 1025.7 1018.2 MAX. QFF PRESSURE IN HPA 1039.0 1033.2 1025.7 1031.3 1019.7 1018.3 1014.6 1017.3 1019.0 1029.8 1041.9 1032.3 1041.9 DAY 26 3 29 4 7 12 3 29 24 18 18 4 MIN. QFF PRESSURE IN HPA 1014.6 1010.3 1011.3 1007.5 1007.2 1003.5 1003.1 1000.9 1003.3 1014.2 1020.1 1016.3 1000.9 DAY 6 9 2 13 29 18 6 8 8 5 6 29 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 867.2 864.9 862.6 864.4 865.2 862.7 862.8 862.5 863.4 867.4 871.1 868.0 865.2 MAX. QFE PRESSURE IN HPA 874.8 870.0 866.8 871.1 868.2 867.7 868.4 869.4 869.0 873.7 878.8 872.5 878.8 DAY 26 13 29 4 7 12 3 29 25 18 18 4 MIN. QFE PRESSURE IN HPA 858.0 858.2 855.9 856.5 860.5 857.7 857.7 857.4 856.8 862.9 864.6 861.4 855.9 DAY 6 9 7 13 29 18 6 8 21 27 6 29 MEAN QNH PRESSURE IN HPA 1024.0 1021.4 1018.7 1020.8 1021.7 1018.9 1018.9 1018.6 1019.6 1024.2 1028.4 1024.9 1021.7 MAX. QNH PRESSURE IN HPA 1032.7 1027.2 1023.5 1028.5 1025.2 1024.6 1025.4 1026.5 1026.1 1031.4 1037.3 1030.1 1037.3 DAY 26 13 29 4 7 12 3 29 25 18 18 4 MIN. QNH PRESSURE IN HPA 1013.5 1013.7 1011.1 1011.8 1016.3 1013.1 1013.1 1012.8 1012.1 1019.1 1021.0 1017.4 1011.1 DAY 6 9 7 13 29 18 6 8 21 27 6 29 MEAN QFF PRESSURE IN HPA 1027.7 1022.7 1019.0 1017.4 1014.0 1009.6 1007.0 1006.8 1009.6 1019.0 1027.6 1024.2 1017.0 MAX. QFF PRESSURE IN HPA 1037.7 1032.9 1024.8 1029.3 1018.7 1017.5 1014.3 1016.2 1018.0 1028.5 1039.7 1030.8 1039.7 DAY 26 3 28 4 7 12 3 29 24 18 18 4 MIN. QFF PRESSURE IN HPA 1015.1 1011.0 1011.0 1006.2 1007.3 1001.8 1001.4 1000.9 1002.4 1012.8 1016.1 1016.6 1000.9 DAY 6 9 2 13 25 18 6 8 8 5 6 29 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 866.1 863.6 861.5 863.5 864.4 861.7 861.4 861.0 862.2 866.3 869.9 867.0 864.1 MAX. QFE PRESSURE IN HPA 873.0 869.0 866.5 869.0 869.3 866.3 867.2 867.6 867.6 873.3 877.2 870.6 877.2 DAY 26 22 28 4 17 12 3 29 25 18 17 4 MIN. QFE PRESSURE IN HPA 857.2 856.3 853.4 856.6 860.0 857.0 856.4 856.4 855.7 861.1 863.8 862.3 853.4 DAY 6 1 7 12 28 18 6 7 21 26 6 29 MEAN QNH PRESSURE IN HPA 1022.8 1019.9 1017.5 1019.8 1020.7 1017.7 1017.4 1017.0 1018.3 1022.9 1027.0 1023.8 1020.4 MAX. QNH PRESSURE IN HPA 1030.6 1026.1 1023.2 1026.1 1026.4 1023.0 1024.0 1024.5 1024.5 1031.0 1035.4 1027.9 1035.4 DAY 26 22 28 4 17 12 3 29 25 18 17 4 MIN. QNH PRESSURE IN HPA 1012.6 1011.5 1008.2 1011.9 1015.8 1012.3 1011.6 1011.6 1010.8 1017.0 1020.1 1018.4 1008.2 DAY 6 1 7 12 28 18 6 7 21 26 6 29 MEAN QFF PRESSURE IN HPA 1026.4 1021.0 1017.7 1016.6 1013.4 1008.7 1005.8 1005.4 1008.6 1017.9 1026.2 1023.1 1015.9 MAX. QFF PRESSURE IN HPA 1035.2 1031.3 1023.9 1026.7 1018.7 1015.8 1012.1 1014.0 1016.0 1028.6 1037.3 1028.4 1037.3 DAY 26 3 28 4 17 12 3 29 24 18 18 4 MIN. QFF PRESSURE IN HPA 1014.9 1009.7 1008.6 1006.8 1006.1 1001.9 1000.6 999.8 1002.8 1011.4 1016.2 1017.7 999.8 DAY 6 9 7 9 28 19 6 8 8 26 6 29 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.4 863.8 861.5 863.4 864.0 861.4 860.8 860.7 862.3 866.4 870.0 867.3 864.0 MAX. QFE PRESSURE IN HPA 873.2 869.4 867.4 869.2 869.0 865.8 866.6 866.6 867.9 874.3 877.6 871.0 877.6 DAY 25 22 28 4 17 11 3 29 25 18 17 4 MIN. QFE PRESSURE IN HPA 858.6 854.9 853.5 852.8 858.9 857.0 855.1 855.9 857.0 860.8 865.0 862.5 852.8 DAY 6 1 7 12 28 18 6 7 21 26 2 29 MEAN QNH PRESSURE IN HPA 1023.0 1020.1 1017.4 1019.6 1020.4 1017.4 1016.6 1016.6 1018.4 1023.1 1027.3 1024.1 1020.3 MAX. QNH PRESSURE IN HPA 1030.9 1026.5 1024.2 1026.3 1026.1 1022.4 1023.3 1023.3 1024.8 1032.1 1035.9 1028.4 1035.9 DAY 25 22 28 4 17 11 3 29 25 18 17 4 MIN. QNH PRESSURE IN HPA 1014.2 1009.9 1008.3 1007.5 1014.5 1012.3 1010.2 1011.1 1012.3 1016.7 1021.5 1018.6 1007.5 DAY 6 1 7 12 28 18 6 7 21 26 2 29 MEAN QFF PRESSURE IN HPA 1027.4 1022.0 1018.3 1017.2 1013.7 1008.8 1005.6 1006.1 1010.2 1019.2 1027.9 1024.5 1016.7 MAX. QFF PRESSURE IN HPA 1035.8 1031.9 1025.6 1027.2 1019.2 1016.2 1011.3 1013.9 1017.2 1030.5 1039.4 1030.1 1039.4 DAY 26 3 28 4 17 11 3 29 25 18 17 3 MIN. QFF PRESSURE IN HPA 1015.9 1010.1 1008.4 1003.6 1004.7 1003.1 999.0 1000.5 1004.6 1011.3 1019.7 1018.3 999.0 DAY 6 1 7 12 28 18 6 7 8 26 6 29 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 867.0 864.3 862.1 863.9 864.4 862.1 861.8 861.7 863.3 867.0 870.8 867.8 864.7 MAX. QFE PRESSURE IN HPA 873.9 869.2 868.0 870.4 869.1 867.5 867.3 867.2 869.0 874.3 878.5 872.0 878.5 DAY 25 22 28 3 17 11 3 29 25 18 17 3 MIN. QFE PRESSURE IN HPA 860.5 854.4 854.8 851.7 858.8 857.2 857.0 857.0 856.8 860.0 865.6 863.8 851.7 DAY 6 1 18 12 28 18 6 7 21 26 1 29 MEAN QNH PRESSURE IN HPA 1023.8 1020.7 1018.2 1020.3 1020.7 1018.2 1017.8 1017.7 1019.5 1023.8 1028.1 1024.7 1021.1 MAX. QNH PRESSURE IN HPA 1031.7 1026.3 1024.9 1027.7 1026.2 1024.3 1024.1 1024.0 1026.1 1032.1 1036.9 1029.5 1036.9 DAY 25 22 28 3 17 11 3 29 25 18 17 3 MIN. QNH PRESSURE IN HPA 1016.3 1009.4 1009.8 1006.3 1014.4 1012.6 1012.3 1012.3 1012.1 1015.8 1022.2 1020.1 1006.3 DAY 6 1 18 12 28 18 6 7 21 26 1 29 MEAN QFF PRESSURE IN HPA 1028.3 1022.6 1018.9 1017.4 1013.3 1009.0 1006.1 1006.2 1010.2 1019.3 1028.6 1024.9 1017.1 MAX. QFF PRESSURE IN HPA 1037.1 1032.8 1026.8 1028.6 1018.5 1017.4 1012.7 1015.6 1018.7 1029.7 1040.5 1031.8 1040.5 DAY 25 3 28 3 12 11 3 29 30 18 17 3 MIN. QFF PRESSURE IN HPA 1018.1 1010.0 1010.9 1002.1 1004.8 1001.0 1001.0 1000.5 1004.2 1010.2 1020.2 1018.6 1000.5 DAY 6 1 7 12 24 18 6 7 7 26 6 29 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 866.9 864.5 862.2 864.2 864.9 862.6 862.4 862.1 863.6 867.1 871.0 867.8 864.9 MAX. QFE PRESSURE IN HPA 874.6 870.1 868.4 871.0 871.2 868.1 867.4 867.7 870.0 873.9 879.0 872.2 879.0 DAY 25 22 28 3 3 11 3 28 30 18 17 3 MIN. QFE PRESSURE IN HPA 860.5 855.8 856.6 852.5 859.8 856.9 858.1 857.5 855.3 860.0 865.5 863.1 852.5 DAY 5 1 18 12 24 18 6 7 21 26 2 13 MEAN QNH PRESSURE IN HPA 1023.6 1021.0 1018.3 1020.5 1021.4 1018.7 1018.5 1018.2 1019.9 1023.9 1028.3 1024.7 1021.4 MAX. QNH PRESSURE IN HPA 1032.5 1027.3 1025.4 1028.4 1028.6 1025.0 1024.2 1024.6 1027.2 1031.7 1037.5 1029.7 1037.5 DAY 25 22 28 3 3 11 3 28 30 18 17 3 MIN. QNH PRESSURE IN HPA 1016.3 1011.0 1011.9 1007.2 1015.5 1012.2 1013.6 1012.9 1010.4 1015.8 1022.1 1019.3 1007.2 DAY 5 1 18 12 24 18 6 7 21 26 2 13 MEAN QFF PRESSURE IN HPA 1027.4 1022.3 1018.4 1017.0 1013.7 1009.4 1006.5 1006.3 1009.8 1018.9 1027.5 1024.0 1016.8 MAX. QFF PRESSURE IN HPA 1037.0 1032.4 1026.5 1029.6 1021.0 1017.5 1012.7 1014.5 1018.9 1028.3 1039.6 1030.5 1039.6 DAY 25 3 28 3 3 11 3 29 30 18 17 3 MIN. QFF PRESSURE IN HPA 1015.9 1012.2 1011.6 1003.0 1005.2 1000.3 1000.7 1001.3 1001.6 1010.7 1018.4 1017.7 1000.3 DAY 5 9 25 12 24 18 28 7 21 26 2 13 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.6 -2.4 1.9 10.7 16.9 22.3 24.8 25.9 19.9 15.7 7.4 3.8 12.3 MINIMUN AIR TEMPERATURE (C) -3.2 -7.3 -1.4 5.1 9.9 14.1 16.5 16.8 12.6 9.6 3.6 0.6 6.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 13 16 7 0 0 0 0 0 0 0 0 5 41 DAYS WITH FREEZING MIN.<= 0 23 24 20 6 0 0 0 0 0 0 2 12 87 TEMPERATURE RECORDS LOWEST(C) -16.6 -18.0 -10.0 -3.2 4.0 10.0 14.2 13.0 7.2 5.0 -2.0 -6.4 -18.0 DAY 29 7 9 11 6 7 18 16 16 30 29 22 MAXIMUM AIR TEMPERATURE (C) 5.3 3.5 6.1 16.6 23.5 29.7 32.2 34.2 27.1 22.6 12.2 8.3 18.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 13 22 28 6 0 0 0 70 DAYS WITH MAXIMUM TEMP. <= 0 7 9 2 0 0 0 0 0 0 0 0 0 18 TEMPERATURE RECORDS HIGHEST(C) 12.8 12.0 16.4 29.0 30.6 33.4 38.2 38.6 32.0 28.4 18.0 16.0 38.6 DAY 5 18 31 26 30 22 29 26 1 18 17 7 DIF. BETWEEN (MAX.-MIN.) (C) 8.5 10.8 7.5 11.5 13.6 15.6 15.7 17.4 14.5 13.0 8.6 7.7 12.0 MEAN DAILY TEMP. (MDT) (C) 1.1 -1.9 2.3 10.8 16.7 21.9 24.4 25.5 19.9 16.1 7.9 4.5 12.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.7 38.6 105.3 139.2 14.2 0.0 0.0 0.0 298.0 HEATING DEG. DAYS(BASE 18 0C) 524.7 556.9 485.5 218.5 61.4 0.0 0.0 0.0 8.7 65.8 302.4 419.0 2642.9 DEWPOINT (MEAN C) -4.5 -6.7 -2.9 0.7 5.4 7.5 9.4 8.1 4.7 5.2 2.0 -2.4 2.2 MIXING RATIO (G/KG) 3.31 2.90 3.67 4.84 6.62 7.86 9.12 8.47 6.42 6.49 5.18 3.81 5.72 VAPOUR PRESSURE (HPA) 4.58 4.01 5.04 6.66 9.11 10.73 12.40 11.55 8.84 8.96 7.16 5.27 7.86 SATURATION DEF. (HPA) 2.31 1.61 2.25 7.33 11.14 17.42 20.46 23.50 15.62 9.64 3.41 3.05 9.81 RELATIVE HUMIDITY (MEAN %) 72 74 72 54 50 43 42 37 41 53 71 66 56 RELATIVE HUMIDITY (MAX. %) 86 88 89 76 73 66 61 54 62 72 87 84 75 RELATIVE HUMIDITY (MIN. %) 56 56 56 35 30 24 28 22 24 35 50 48 39 RELATIVE HUMIDITY (MEAN% 03UTC) 80 82 83 70 71 63 58 52 58 66 83 76 70 RELATIVE HUMIDITY (MEAN% 09UTC) 65 64 62 41 36 33 33 31 31 40 59 54 46 RELATIVE HUMIDITY (MEAN% 15UTC) 67 69 68 44 37 26 31 25 30 46 65 61 47 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 80.2 40.4 99.7 40.0 54.8 2.9 9.0 0.0 0.0 29.5 81.2 18.1 455.8 DAYS WITH PRECIPITATION >=10 4 2 4 1 2 0 0 0 0 1 2 0 16 DAYS WITH PRECIPITATION >= 5 4 3 7 3 3 0 1 0 0 2 5 1 29 DAYS WITH PRECIPITATION >= 1 7 6 13 8 8 1 2 0 0 6 7 6 64 DAYS WITH PRECIPITATION 8 8 15 13 9 4 2 0 0 6 8 10 83 GREATEST DAILY PRECIPITATION 25.0 13.0 20.8 10.3 19.0 2.0 6.0 0.0 0.0 11.0 35.0 5.8 35.0 DAY 16 26 4 9 21 6 4 ** ** 19 4 1 DAY WITH THUNDER STORM 0 1 0 1 7 2 2 0 0 1 1 0 15 DAYS WITH SNOW OR SLEET 7 8 9 3 0 0 0 0 0 0 0 3 30 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 180 180 180 225 225 360 45 225 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 10.3 11.6 12.2 10.4 9.8 11.4 7.2 5.8 12.0 9.0 9.4 10.3 10.5 PREVAILING WIND PERCENT 16.1 15.2 25.8 30.0 12.9 15.8 13.3 9.7 17.1 16.9 5.0 20.6 14.4 CALMS PERCENT OF WIND 70.2 70.5 52.0 50.0 67.3 62.5 62.9 64.9 54.2 63.3 84.2 65.3 63.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 198 195 197 196 201 216 360 207 202 197 193 195 199 VECTOR WIND MAGNITUDE(KNOTS) 2.8 2.7 4.9 4.8 1.8 1.7 0.4 0.7 2.4 2.6 0.7 3.1 2.3 WIND STEADINESES (MEAN %) 90.3 90.0 89.1 92.3 60.0 48.6 13.3 25.0 53.3 78.8 53.8 91.2 65.7 WIND SPEED (MEAN KNOTS) 3.1 3.0 5.5 5.2 3.0 3.5 3.0 2.8 4.5 3.3 1.3 3.4 3.5 FASTEST WIND DIRECTION 210 180 210 210 210 210 190 210 200 210 210 180 210 FASTEST WIND SPEED (KNOTS) 21 23 27 25 29 27 16 19 23 23 23 23 29 DAY 7 4 23 10 3 28 23 13 2 2 5 8 DAYS WITH SKY CLEAR (0-2)/8 16 17 9 9 16 26 29 31 28 19 12 9 221 DAYS WITH P.CLOUDY (3-6)/8 8 8 12 16 12 3 2 0 2 9 10 17 99 DAYS WITH CLOUDY (7-8)/8 7 3 10 5 3 1 0 0 0 3 8 5 45 DAYS WITH VISIBILITY =< 2 KM 0 0 3 1 0 0 0 0 0 0 0 0 4 DURATION OF SUNSHINE HOURS 161.5 188.2 173.7 235.9 279.9 341.4 378.9 332.7 282.5 212.6 157.2 146.9 2891.4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 865.8 865.9 861.7 863.0 865.2 861.5 859.6 861.0 865.3 867.6 868.3 866.2 864.3 MAX. QFE PRESSURE IN HPA 872.9 874.4 875.5 870.2 871.3 866.6 866.0 866.1 871.9 874.0 878.4 873.9 878.4 DAY-HOUR 23-21 7- 9 11- 6 13- 6 12- 6 8- 6 19- 6 24- 6 14-18 9- 6 8- 6 28- 6 MIN. QFE PRESSURE IN HPA 852.4 855.6 851.1 853.1 855.0 854.0 854.4 854.9 859.1 861.5 863.4 856.2 851.1 DAY-HOUR 15-21 5- 3 28-12 5- 3 4- 3 24-15 11-15 5-15 2-15 2-12 4-21 9-12 MEAN QNH PRESSURE IN HPA 1022.4 1022.5 1017.8 1019.2 1021.7 1017.4 1015.2 1017.0 1021.8 1024.4 1025.3 1022.9 1020.6 MAX. QNH PRESSURE IN HPA 1030.5 1032.2 1033.5 1027.4 1028.7 1023.3 1022.6 1022.7 1029.4 1031.8 1036.8 1031.7 1036.8 DAY-HOUR 23-21 7- 9 11- 6 13- 6 12- 6 8- 6 19- 6 24- 6 14-18 9- 6 8- 6 28- 6 MIN. QNH PRESSURE IN HPA 1007.1 1010.7 1005.6 1007.9 1010.0 1008.9 1009.4 1009.9 1014.7 1017.5 1019.7 1011.4 1005.6 DAY-HOUR 15-21 5- 3 28-12 5- 3 4- 3 24-15 11-15 5-15 2-15 2-12 4-21 9-12 MEAN QFF PRESSURE IN HPA 1025.8 1027.9 1020.2 1016.3 1015.3 1007.8 1004.1 1005.4 1013.6 1018.7 1024.4 1024.2 1017.0 MAX. QFF PRESSURE IN HPA 1038.8 1044.3 1039.6 1029.3 1023.9 1015.0 1012.3 1012.8 1025.5 1025.6 1036.4 1037.9 1044.3 DAY-HOUR 19- 6 7- 6 11- 6 13- 6 7- 3 7- 3 19- 6 24- 6 15- 3 8- 6 8- 6 28- 6 MIN. QFF PRESSURE IN HPA 1008.2 1014.4 1005.8 1006.1 1004.0 998.1 997.7 996.8 1003.7 1008.9 1017.1 1010.5 996.8 DAY-HOUR 15-21 21-21 28-12 5- 3 4- 0 24-15 16-12 5-12 2- 9 6-12 5- 9 9-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 866.0 865.6 861.5 862.8 865.2 861.6 859.7 861.0 865.4 867.4 868.3 866.2 864.2 MAX. QFE PRESSURE IN HPA 872.9 872.0 873.6 868.9 870.4 866.0 863.5 863.9 871.6 872.2 876.9 872.6 876.9 DAY 24 7 11 13 12 8 8 25 15 9 8 28 MIN. QFE PRESSURE IN HPA 852.4 856.0 852.9 855.2 855.9 856.2 856.2 856.6 860.0 863.2 863.6 856.3 852.4 DAY 16 5 29 5 4 30 17 6 3 2 5 10 MEAN QNH PRESSURE IN HPA 1022.6 1022.2 1017.5 1019.0 1021.8 1017.6 1015.4 1016.9 1021.9 1024.3 1025.3 1022.8 1020.6 MAX. QNH PRESSURE IN HPA 1030.5 1029.5 1031.3 1025.9 1027.7 1022.6 1019.8 1020.2 1029.0 1029.7 1035.1 1030.2 1035.1 DAY 24 7 11 13 12 8 8 25 15 9 8 28 MIN. QNH PRESSURE IN HPA 1007.1 1011.2 1007.6 1010.3 1011.1 1011.4 1011.4 1011.9 1015.8 1019.4 1019.9 1011.5 1007.1 DAY 16 5 29 5 4 30 17 6 3 2 5 10 MEAN QFF PRESSURE IN HPA 1025.4 1027.2 1019.7 1015.8 1015.2 1008.1 1004.2 1005.2 1013.4 1018.0 1024.0 1023.7 1016.7 MAX. QFF PRESSURE IN HPA 1036.7 1040.9 1037.1 1027.8 1022.6 1014.4 1010.7 1009.8 1025.2 1023.4 1034.2 1034.6 1040.9 DAY 19 7 11 13 7 8 8 16 15 9 8 28 MIN. QFF PRESSURE IN HPA 1009.7 1014.6 1007.3 1007.5 1004.0 1000.9 999.7 998.8 1004.5 1010.9 1017.4 1011.2 998.8 DAY 16 5 29 28 4 30 11 6 2 6 5 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 865.7 865.5 861.6 862.8 865.5 862.1 860.2 861.6 865.7 867.8 868.4 866.1 864.4 MAX. QFE PRESSURE IN HPA 872.2 872.5 874.2 869.4 871.0 866.1 865.2 865.3 871.4 872.5 877.2 872.6 877.2 DAY 24 7 11 13 12 8 19 24 15 9 8 28 MIN. QFE PRESSURE IN HPA 852.5 855.6 853.0 853.1 855.0 857.2 856.4 857.0 859.9 863.1 863.8 856.2 852.5 DAY 16 5 25 5 4 24 11 5 3 2 5 10 MEAN QNH PRESSURE IN HPA 1022.2 1022.1 1017.6 1019.0 1022.1 1018.2 1016.0 1017.6 1022.3 1024.7 1025.4 1022.7 1020.8 MAX. QNH PRESSURE IN HPA 1029.7 1030.1 1032.0 1026.5 1028.4 1022.7 1021.7 1021.8 1028.8 1030.1 1035.4 1030.2 1035.4 DAY 24 7 11 13 12 8 19 24 15 9 8 28 MIN. QNH PRESSURE IN HPA 1007.2 1010.7 1007.7 1007.9 1010.0 1012.6 1011.6 1012.3 1015.6 1019.3 1020.1 1011.4 1007.2 DAY 16 5 25 5 4 24 11 5 3 2 5 10 MEAN QFF PRESSURE IN HPA 1025.9 1028.3 1020.5 1016.7 1016.3 1009.0 1005.6 1006.8 1014.8 1019.7 1025.1 1024.6 1017.8 MAX. QFF PRESSURE IN HPA 1037.7 1043.5 1037.9 1029.2 1023.9 1015.0 1010.8 1012.1 1025.5 1025.2 1035.3 1035.9 1043.5 DAY 19 7 11 13 7 7 19 21 15 10 8 28 MIN. QFF PRESSURE IN HPA 1010.1 1015.1 1007.5 1006.1 1005.2 1001.1 999.9 1000.6 1005.2 1011.4 1017.8 1011.5 999.9 DAY 16 22 25 5 4 24 11 5 2 6 5 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.6 866.6 862.4 863.8 865.9 862.3 860.6 862.2 866.3 868.5 869.2 867.0 865.1 MAX. QFE PRESSURE IN HPA 872.8 874.2 875.5 870.2 871.3 866.6 866.0 866.1 871.6 874.0 878.4 873.9 878.4 DAY 24 7 11 13 12 8 19 24 14 9 8 28 MIN. QFE PRESSURE IN HPA 854.6 858.4 853.0 853.8 856.5 857.0 856.2 857.0 859.8 863.4 865.6 856.9 853.0 DAY 16 5 19 9 4 24 11 5 2 2 3 10 MEAN QNH PRESSURE IN HPA 1023.3 1023.3 1018.5 1020.1 1022.5 1018.4 1016.4 1018.2 1023.0 1025.5 1026.3 1023.7 1021.6 MAX. QNH PRESSURE IN HPA 1030.4 1032.0 1033.5 1027.4 1028.7 1023.3 1022.6 1022.7 1029.0 1031.8 1036.8 1031.7 1036.8 DAY 24 7 11 13 12 8 19 24 14 9 8 28 MIN. QNH PRESSURE IN HPA 1009.6 1013.9 1007.7 1008.7 1011.8 1012.3 1011.4 1012.3 1015.5 1019.7 1022.2 1012.2 1007.7 DAY 16 5 19 9 4 24 11 5 2 2 3 10 MEAN QFF PRESSURE IN HPA 1027.1 1029.3 1021.1 1017.4 1016.0 1008.6 1005.1 1006.7 1014.9 1020.0 1025.9 1025.6 1018.1 MAX. QFF PRESSURE IN HPA 1038.8 1044.3 1039.6 1029.3 1022.8 1014.8 1012.3 1012.8 1024.3 1025.6 1036.4 1037.9 1044.3 DAY 19 7 11 13 6 8 19 24 15 8 8 28 MIN. QFF PRESSURE IN HPA 1012.5 1015.2 1009.0 1008.3 1006.9 1001.1 998.9 999.6 1004.0 1011.3 1019.4 1012.6 998.9 DAY 16 22 25 9 4 24 11 5 2 6 3 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 866.3 866.5 862.2 863.3 865.5 861.9 859.9 861.5 865.6 867.9 868.7 866.4 864.6 MAX. QFE PRESSURE IN HPA 872.5 874.4 874.8 870.0 870.6 866.1 864.8 865.3 871.6 873.5 878.3 872.8 878.3 DAY 23 7 11 13 12 8 19 24 14 9 8 28 MIN. QFE PRESSURE IN HPA 855.4 859.5 852.3 853.6 857.0 856.4 855.5 856.1 859.5 862.5 865.0 856.8 852.3 DAY 16 4 19 9 4 30 11 5 2 6 5 10 MEAN QNH PRESSURE IN HPA 1023.0 1023.2 1018.2 1019.6 1022.1 1017.9 1015.7 1017.5 1022.2 1024.9 1025.8 1023.0 1021.1 MAX. QNH PRESSURE IN HPA 1030.1 1032.2 1032.7 1027.2 1027.9 1022.7 1021.3 1021.8 1029.0 1031.2 1036.7 1030.4 1036.7 DAY 23 7 11 13 12 8 19 24 14 9 8 28 MIN. QNH PRESSURE IN HPA 1010.5 1015.2 1007.0 1008.4 1012.3 1011.6 1010.6 1011.3 1015.2 1018.6 1021.5 1012.1 1007.0 DAY 16 4 19 9 4 30 11 5 2 6 5 10 MEAN QFF PRESSURE IN HPA 1025.9 1028.1 1020.4 1016.3 1015.3 1008.1 1004.2 1005.4 1013.4 1018.4 1024.4 1024.0 1017.0 MAX. QFF PRESSURE IN HPA 1036.3 1042.7 1038.1 1027.7 1022.0 1013.7 1011.0 1011.4 1023.6 1024.6 1036.1 1034.9 1042.7 DAY 20 7 11 13 6 6 19 24 14 8 8 28 MIN. QFF PRESSURE IN HPA 1013.1 1014.6 1007.4 1008.7 1008.4 1000.4 998.4 998.1 1003.7 1009.7 1017.1 1011.6 998.1 DAY 16 22 6 9 4 30 11 5 2 6 5 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 865.2 865.3 861.3 862.4 864.4 860.8 858.7 860.2 864.4 866.7 867.6 865.3 863.5 MAX. QFE PRESSURE IN HPA 872.0 872.7 873.4 868.8 869.2 864.8 863.5 863.8 871.3 871.8 876.5 871.5 876.5 DAY 23 7 11 13 12 8 19 24 14 9 8 27 MIN. QFE PRESSURE IN HPA 855.6 858.2 851.1 854.2 855.7 854.6 854.4 855.3 859.3 861.5 864.5 856.2 851.1 DAY 16 4 28 9 4 24 16 5 2 2 19 9 MEAN QNH PRESSURE IN HPA 1021.7 1021.9 1017.2 1018.5 1020.8 1016.7 1014.3 1016.0 1020.8 1023.4 1024.4 1021.9 1019.8 MAX. QNH PRESSURE IN HPA 1029.5 1030.3 1031.1 1025.8 1026.3 1021.3 1019.8 1020.1 1028.7 1029.3 1034.6 1028.9 1034.6 DAY 23 7 11 13 12 8 19 24 14 9 8 27 MIN. QNH PRESSURE IN HPA 1010.7 1013.7 1005.6 1009.1 1010.8 1009.6 1009.4 1010.4 1015.0 1017.5 1020.9 1011.4 1005.6 DAY 16 4 28 9 4 24 16 5 2 2 19 9 MEAN QFF PRESSURE IN HPA 1024.6 1026.7 1019.4 1015.4 1014.1 1007.0 1003.0 1004.1 1012.4 1017.3 1023.0 1022.8 1015.8 MAX. QFF PRESSURE IN HPA 1035.4 1041.1 1036.2 1025.9 1021.7 1012.5 1009.3 1009.5 1023.4 1023.3 1034.2 1033.4 1041.1 DAY 19 7 11 13 6 9 19 24 14 31 7 28 MIN. QFF PRESSURE IN HPA 1013.1 1014.8 1005.8 1008.6 1006.1 998.6 997.7 996.8 1003.9 1008.9 1017.3 1010.5 996.8 DAY 15 22 28 5 3 24 16 5 2 6 3 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 865.2 865.5 861.2 862.5 864.2 860.3 858.4 859.9 864.3 866.9 867.8 866.0 863.5 MAX. QFE PRESSURE IN HPA 872.0 872.2 873.6 868.5 868.9 864.7 863.1 863.6 871.0 871.5 876.5 872.9 876.5 DAY 23 7 11 13 8 8 19 24 14 9 7 27 MIN. QFE PRESSURE IN HPA 855.0 858.2 851.6 855.9 855.0 854.0 854.4 854.9 859.1 862.1 864.5 856.9 851.6 DAY 15 4 28 9 4 24 11 5 2 2 30 9 MEAN QNH PRESSURE IN HPA 1021.8 1022.0 1017.2 1018.6 1020.6 1016.2 1013.9 1015.6 1020.7 1023.7 1024.7 1022.7 1019.8 MAX. QNH PRESSURE IN HPA 1029.5 1029.7 1031.3 1025.5 1025.9 1021.1 1019.3 1019.9 1028.4 1028.9 1034.6 1030.5 1034.6 DAY 23 7 11 13 8 8 19 24 14 9 7 27 MIN. QNH PRESSURE IN HPA 1010.0 1013.7 1006.1 1011.1 1010.0 1008.9 1009.4 1009.9 1014.7 1018.2 1020.9 1012.2 1006.1 DAY 15 4 28 9 4 24 11 5 2 2 30 9 MEAN QFF PRESSURE IN HPA 1025.6 1028.1 1020.0 1016.3 1014.7 1007.0 1003.3 1004.6 1013.3 1018.7 1024.4 1024.5 1016.7 MAX. QFF PRESSURE IN HPA 1037.7 1042.0 1036.5 1026.2 1022.2 1012.9 1008.9 1009.3 1023.5 1024.7 1035.4 1034.9 1042.0 DAY 19 7 11 13 6 7 19 24 14 31 7 27 MIN. QFF PRESSURE IN HPA 1010.9 1015.5 1007.4 1009.7 1005.8 998.1 998.3 997.9 1004.8 1010.7 1018.6 1011.8 997.9 DAY 15 22 25 27 4 24 11 5 2 2 3 9 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 865.8 866.0 861.9 863.2 865.4 861.2 859.3 861.0 865.3 867.7 868.3 866.4 864.3 MAX. QFE PRESSURE IN HPA 872.7 872.5 873.5 869.0 869.4 865.5 863.2 863.9 871.9 872.4 876.9 872.9 876.9 DAY 23 7 11 13 8 7 19 24 14 9 7 27 MIN. QFE PRESSURE IN HPA 853.4 858.9 852.3 856.4 858.5 855.2 855.5 856.4 860.5 862.8 864.4 857.3 852.3 DAY 15 4 28 9 4 24 16 5 2 2 4 9 MEAN QNH PRESSURE IN HPA 1022.5 1022.6 1017.9 1019.4 1021.9 1017.1 1014.9 1016.9 1021.8 1024.6 1025.3 1023.1 1020.7 MAX. QNH PRESSURE IN HPA 1030.3 1030.1 1031.2 1026.1 1026.5 1022.1 1019.4 1020.2 1029.4 1030.0 1035.1 1030.5 1035.1 DAY 23 7 11 13 8 7 19 24 14 9 7 27 MIN. QNH PRESSURE IN HPA 1008.2 1014.5 1007.0 1011.6 1014.0 1010.3 1010.6 1011.6 1016.3 1019.0 1020.8 1012.7 1007.0 DAY 15 4 28 9 4 24 16 5 2 2 4 9 MEAN QFF PRESSURE IN HPA 1026.4 1028.5 1020.3 1016.6 1015.3 1007.3 1003.6 1005.3 1013.7 1019.0 1024.8 1024.9 1017.2 MAX. QFF PRESSURE IN HPA 1038.3 1042.6 1037.4 1026.9 1021.4 1014.5 1008.5 1009.7 1025.3 1024.7 1035.1 1035.5 1042.6 DAY 19 7 10 12 6 7 19 21 14 31 7 27 MIN. QFF PRESSURE IN HPA 1009.0 1016.9 1006.9 1007.5 1009.0 998.9 998.8 998.7 1005.0 1011.6 1018.8 1012.9 998.7 DAY 15 22 28 27 3 30 11 5 2 2 4 9 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 865.9 866.0 862.0 863.2 865.7 861.5 859.8 861.2 865.4 867.8 868.3 866.4 864.4 MAX. QFE PRESSURE IN HPA 872.9 872.0 873.6 869.2 869.6 865.9 863.4 864.3 871.6 872.4 876.9 872.6 876.9 DAY 23 16 11 13 11 7 19 24 14 9 7 27 MIN. QFE PRESSURE IN HPA 852.4 856.7 853.0 854.0 857.8 855.9 856.4 856.6 860.6 863.6 863.4 856.9 852.4 DAY 15 4 28 4 3 29 10 5 2 2 4 9 MEAN QNH PRESSURE IN HPA 1022.5 1022.6 1018.1 1019.4 1022.3 1017.5 1015.5 1017.2 1022.0 1024.7 1025.3 1023.1 1020.8 MAX. QNH PRESSURE IN HPA 1030.5 1029.5 1031.3 1026.3 1026.7 1022.5 1019.7 1020.7 1029.0 1030.0 1035.1 1030.2 1035.1 DAY 23 16 11 13 11 7 19 24 14 9 7 27 MIN. QNH PRESSURE IN HPA 1007.1 1012.0 1007.7 1008.9 1013.2 1011.1 1011.6 1011.9 1016.5 1019.9 1019.7 1012.2 1007.1 DAY 15 4 28 4 3 29 10 5 2 2 4 9 MEAN QFF PRESSURE IN HPA 1025.6 1027.5 1020.1 1016.1 1015.3 1007.7 1004.0 1005.2 1013.3 1018.3 1024.0 1024.0 1016.8 MAX. QFF PRESSURE IN HPA 1036.6 1039.4 1037.0 1027.5 1022.4 1014.8 1009.7 1009.8 1024.3 1024.8 1034.7 1034.9 1039.4 DAY 18 7 10 12 6 7 7 15 14 31 7 27 MIN. QFF PRESSURE IN HPA 1008.2 1014.4 1007.7 1006.1 1006.8 1000.4 999.6 998.5 1004.7 1010.9 1017.3 1011.4 998.5 DAY 15 21 28 4 3 29 10 5 1 2 4 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.5 -0.8 6.2 12.5 16.9 23.5 25.5 26.1 21.5 14.8 11.9 6.9 13.5 MINIMUN AIR TEMPERATURE (C) -5.5 -4.6 2.2 6.7 10.1 14.6 18.3 17.5 13.2 7.2 6.9 2.5 7.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 2 0 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 17 19 0 0 0 0 0 0 0 0 0 2 38 DAYS WITH FREEZING MIN.<= 0 29 26 11 2 0 0 0 0 0 0 0 9 77 TEMPERATURE RECORDS LOWEST(C) -14.8 -11.4 -3.6 0.0 5.6 10.2 15.0 15.2 9.0 2.6 1.2 -4.8 -14.8 DAY 16 16 26 1 5 4 26 5 27 13 26 14 MAXIMUM AIR TEMPERATURE (C) 1.6 3.6 11.0 18.7 23.5 31.1 31.8 34.1 29.0 22.5 18.1 12.8 19.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 21 23 30 15 0 0 0 89 DAYS WITH MAXIMUM TEMP. <= 0 5 7 0 0 0 0 0 0 0 0 0 0 12 TEMPERATURE RECORDS HIGHEST(C) 5.0 10.0 16.8 28.0 29.4 37.4 36.2 39.6 38.0 29.0 22.0 20.0 39.6 DAY 25 6 28 15 9 23 23 30 1 5 8 10 DIF. BETWEEN (MAX.-MIN.) (C) 7.1 8.2 8.8 12.0 13.4 16.5 13.5 16.6 15.8 15.3 11.2 10.3 12.4 MEAN DAILY TEMP. (MDT) (C) -2.0 -0.5 6.6 12.7 16.8 22.9 25.1 25.8 21.1 14.9 12.5 7.6 13.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 2.2 63.3 125.8 148.7 34.2 0.0 0.0 0.0 374.2 HEATING DEG. DAYS(BASE 18 0C) 618.8 517.6 354.0 161.4 56.3 0.0 0.0 0.0 7.2 100.6 164.9 321.0 2301.8 DEWPOINT (MEAN C) -7.1 -7.3 -1.4 3.4 6.7 6.8 10.8 7.9 4.1 0.5 1.0 -3.2 1.8 MIXING RATIO (G/KG) 2.68 2.70 4.13 5.78 7.36 7.50 9.80 8.08 6.14 4.71 4.90 3.61 5.62 VAPOUR PRESSURE (HPA) 3.71 3.74 5.69 7.96 10.11 10.28 13.35 11.06 8.45 6.52 6.79 5.01 7.72 SATURATION DEF. (HPA) 1.53 2.27 4.15 7.37 10.12 20.39 20.40 24.63 18.70 11.41 7.65 5.50 11.18 RELATIVE HUMIDITY (MEAN %) 72 63 61 57 55 38 43 36 36 42 52 54 51 RELATIVE HUMIDITY (MAX. %) 85 80 80 78 79 60 61 54 57 64 72 73 70 RELATIVE HUMIDITY (MIN. %) 56 46 41 37 33 21 28 20 20 23 33 35 33 RELATIVE HUMIDITY (MEAN% 03UTC) 80 73 75 75 78 58 58 53 56 62 65 67 67 RELATIVE HUMIDITY (MEAN% 09UTC) 64 55 49 45 40 28 34 27 26 28 39 44 40 RELATIVE HUMIDITY (MEAN% 15UTC) 68 56 51 45 38 25 30 23 24 33 47 46 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 104.9 50.5 96.8 58.1 37.6 3.8 6.0 0.0 0.0 0.8 16.9 31.2 406.6 DAYS WITH PRECIPITATION >=10 4 2 2 2 0 0 0 0 0 0 1 1 12 DAYS WITH PRECIPITATION >= 5 7 3 6 4 4 0 1 0 0 0 1 3 29 DAYS WITH PRECIPITATION >= 1 11 7 11 8 9 1 1 0 0 0 1 5 54 DAYS WITH PRECIPITATION 15 11 11 9 9 2 1 0 0 1 4 7 70 GREATEST DAILY PRECIPITATION 34.0 20.0 45.8 21.8 8.6 3.0 6.0 0.0 0.0 0.8 16.0 13.3 45.8 DAY 26 8 17 28 12 3 29 ** ** 19 11 30 DAY WITH THUNDER STORM 0 0 1 2 6 1 2 0 0 0 0 1 13 DAYS WITH SNOW OR SLEET 15 9 3 0 0 0 0 0 0 0 0 3 30 DAYS WITH DUST 1 0 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 180 180 180 225 225 45 360 45 225 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 10.8 11.3 10.8 11.2 11.1 7.1 5.8 6.9 11.3 8.6 11.1 10.1 10.5 PREVAILING WIND PERCENT 15.3 16.1 35.1 16.7 15.3 10.0 13.7 9.3 10.0 8.1 18.3 19.8 12.7 CALMS PERCENT OF WIND 75.4 64.3 45.2 65.4 69.0 67.5 65.3 71.8 73.3 72.6 65.0 64.1 66.6 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 190 195 197 206 204 344 12 63 201 216 198 197 200 VECTOR WIND MAGNITUDE(KNOTS) 1.9 1.9 5.7 2.6 2.4 0.2 0.8 0.2 1.2 1.1 3.4 3.0 1.8 WIND STEADINESES (MEAN %) 79.2 55.9 95.0 78.8 80.0 7.7 30.8 8.0 50.0 47.8 87.2 88.2 56.2 WIND SPEED (MEAN KNOTS) 2.4 3.4 6.0 3.3 3.0 2.6 2.6 2.5 2.4 2.3 3.9 3.4 3.2 FASTEST WIND DIRECTION 210 210 210 200 200 180 200 210 210 210 180 200 210 FASTEST WIND SPEED (KNOTS) 19 23 29 23 25 17 19 19 23 23 29 25 29 DAY 1 8 24 17 21 24 5 16 24 1 10 17 DAYS WITH SKY CLEAR (0-2)/8 9 10 12 13 15 30 28 31 29 26 20 12 235 DAYS WITH P.CLOUDY (3-6)/8 10 12 10 7 15 0 3 0 1 3 10 15 86 DAYS WITH CLOUDY (7-8)/8 12 6 9 10 1 0 0 0 0 2 0 4 44 DAYS WITH VISIBILITY =< 2 KM 2 3 1 1 0 0 0 0 0 0 0 1 8 DURATION OF SUNSHINE HOURS 116.7 136.1 210.7 216.0 302.6 375.5 361.7 329.9 286.2 246.0 215.4 170.6 2967.4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 864.4 865.9 863.0 864.5 864.6 863.6 860.7 862.9 864.1 868.2 868.2 868.9 864.9 MAX. QFE PRESSURE IN HPA 873.3 878.3 871.5 875.3 871.8 869.7 867.9 866.6 869.7 875.4 874.2 876.6 878.3 DAY-HOUR 22- 6 22-18 26- 6 12- 6 8- 6 17- 3 20- 6 25- 3 27- 6 13- 6 21-18 29- 6 MIN. QFE PRESSURE IN HPA 853.2 852.0 852.9 855.7 857.7 858.6 854.0 858.2 858.5 860.9 861.0 862.0 852.0 DAY-HOUR 12-18 8- 3 29-15 21-12 21-15 24-15 5-15 12-15 4-12 1-18 10-12 17- 3 MEAN QNH PRESSURE IN HPA 1020.8 1022.6 1019.2 1020.9 1021.0 1019.9 1016.5 1019.1 1020.5 1025.1 1025.1 1026.0 1021.4 MAX. QNH PRESSURE IN HPA 1031.0 1036.7 1028.9 1033.3 1029.3 1026.9 1024.8 1023.3 1026.9 1033.4 1032.0 1034.8 1036.7 DAY-HOUR 22- 6 22-18 26- 6 12- 6 8- 6 17- 3 20- 6 25- 3 27- 6 13- 6 21-18 29- 6 MIN. QNH PRESSURE IN HPA 1008.0 1006.6 1007.6 1010.8 1013.1 1014.2 1008.9 1013.7 1014.0 1016.8 1016.9 1018.1 1006.6 DAY-HOUR 12-18 8- 3 29-15 21-12 21-15 24-15 5-15 12-15 4-12 1-18 10-12 17- 3 MEAN QFF PRESSURE IN HPA 1026.2 1026.9 1019.0 1016.9 1014.4 1009.7 1005.0 1007.5 1011.5 1020.0 1021.7 1025.6 1017.0 MAX. QFF PRESSURE IN HPA 1038.7 1043.2 1031.6 1028.7 1025.9 1017.8 1013.1 1012.8 1021.3 1031.4 1030.3 1036.7 1043.2 DAY-HOUR 22- 6 22-18 26- 6 12- 6 4- 6 17- 3 21- 6 3- 3 27- 3 13- 3 25- 6 29- 6 MIN. QFF PRESSURE IN HPA 1011.5 1005.5 1003.5 1006.1 1004.7 1001.4 997.4 1001.0 1002.1 1008.4 1011.0 1013.6 997.4 DAY-HOUR 30- 0 8- 3 29-15 17-12 29- 0 24- 3 5- 9 12-12 4-12 1-18 9-21 17- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 864.3 865.7 862.9 864.3 864.6 863.8 860.9 863.0 864.3 868.2 868.2 869.0 864.9 MAX. QFE PRESSURE IN HPA 871.2 877.6 869.5 874.5 870.8 868.6 866.5 865.8 868.7 873.5 873.2 876.3 877.6 DAY 22 23 26 12 8 6 20 3 29 14 22 29 MIN. QFE PRESSURE IN HPA 854.2 852.2 854.8 856.8 858.2 859.1 854.8 859.1 860.2 862.3 862.0 862.8 852.2 DAY 30 8 30 24 21 24 5 13 4 1 10 24 MEAN QNH PRESSURE IN HPA 1020.7 1022.3 1019.0 1020.7 1021.0 1020.1 1016.8 1019.2 1020.7 1025.2 1025.2 1026.1 1021.4 MAX. QNH PRESSURE IN HPA 1028.6 1035.9 1026.6 1032.4 1028.1 1025.6 1023.2 1022.4 1025.7 1031.2 1030.9 1034.4 1035.9 DAY 22 23 26 12 8 6 20 3 29 14 22 29 MIN. QNH PRESSURE IN HPA 1009.1 1006.8 1009.8 1012.1 1013.7 1014.7 1009.8 1014.7 1016.0 1018.4 1018.1 1019.0 1006.8 DAY 30 8 30 24 21 24 5 13 4 1 10 24 MEAN QFF PRESSURE IN HPA 1025.6 1026.3 1018.5 1016.5 1014.4 1009.9 1005.2 1007.4 1011.2 1019.7 1021.2 1025.0 1016.7 MAX. QFF PRESSURE IN HPA 1034.7 1041.0 1029.1 1027.1 1025.5 1016.4 1011.2 1011.3 1019.6 1028.3 1028.9 1036.2 1041.0 DAY 22 23 26 12 4 6 21 3 27 13 25 29 MIN. QFF PRESSURE IN HPA 1011.5 1006.5 1006.9 1007.6 1004.7 1002.0 998.1 1002.1 1003.7 1010.4 1011.3 1014.7 998.1 DAY 30 8 30 18 29 24 5 13 4 1 10 17 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 864.1 865.6 862.9 864.6 865.0 864.4 861.4 863.7 864.7 868.6 868.5 868.9 865.2 MAX. QFE PRESSURE IN HPA 871.7 877.4 870.4 874.9 871.6 869.7 867.3 866.6 869.4 874.4 873.3 876.0 877.4 DAY 22 23 26 12 8 17 20 25 27 13 22 29 MIN. QFE PRESSURE IN HPA 854.0 852.0 854.6 857.4 858.3 858.8 855.3 860.0 860.6 862.8 862.1 862.0 852.0 DAY 30 8 17 22 29 24 5 16 5 1 10 17 MEAN QNH PRESSURE IN HPA 1020.4 1022.2 1019.1 1021.1 1021.5 1020.8 1017.4 1020.0 1021.1 1025.6 1025.4 1026.0 1021.7 MAX. QNH PRESSURE IN HPA 1029.2 1035.7 1027.7 1032.8 1029.0 1026.9 1024.1 1023.3 1026.5 1032.2 1031.0 1034.1 1035.7 DAY 22 23 26 12 8 17 20 25 27 13 22 29 MIN. QNH PRESSURE IN HPA 1008.9 1006.6 1009.6 1012.8 1013.8 1014.4 1010.4 1015.8 1016.5 1019.0 1018.2 1018.1 1006.6 DAY 30 8 17 22 29 24 5 16 5 1 10 17 MEAN QFF PRESSURE IN HPA 1026.3 1027.0 1019.3 1017.7 1015.5 1011.1 1006.4 1009.1 1012.9 1021.4 1022.7 1026.1 1018.0 MAX. QFF PRESSURE IN HPA 1036.6 1041.4 1031.2 1028.6 1025.2 1017.8 1013.0 1012.8 1021.3 1031.4 1030.1 1035.9 1041.4 DAY 22 23 26 12 4 17 21 3 27 13 25 29 MIN. QFF PRESSURE IN HPA 1012.3 1005.5 1008.8 1009.1 1005.9 1001.4 999.0 1003.3 1006.9 1012.1 1012.5 1013.6 999.0 DAY 30 8 17 18 29 24 5 16 4 1 10 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 865.1 866.6 863.6 865.3 865.4 864.6 861.7 864.1 865.2 869.5 869.3 869.9 865.9 MAX. QFE PRESSURE IN HPA 873.3 877.9 871.5 875.3 871.8 869.6 867.9 866.6 869.7 875.4 873.9 876.6 877.9 DAY 22 23 26 12 8 17 20 25 27 13 21 29 MIN. QFE PRESSURE IN HPA 856.4 853.2 853.9 857.3 857.9 859.3 854.8 860.0 861.2 862.8 862.4 864.3 853.2 DAY 30 8 17 21 21 24 5 16 5 1 10 17 MEAN QNH PRESSURE IN HPA 1021.6 1023.4 1019.9 1021.8 1021.9 1021.1 1017.7 1020.5 1021.7 1026.6 1026.4 1027.1 1022.5 MAX. QNH PRESSURE IN HPA 1031.0 1036.2 1028.9 1033.3 1029.3 1026.7 1024.8 1023.3 1026.9 1033.4 1031.7 1034.8 1036.2 DAY 22 23 26 12 8 17 20 25 27 13 21 29 MIN. QNH PRESSURE IN HPA 1011.6 1008.0 1008.8 1012.7 1013.4 1015.0 1009.8 1015.8 1017.1 1019.0 1018.5 1020.7 1008.0 DAY 30 8 17 21 21 24 5 16 5 1 10 17 MEAN QFF PRESSURE IN HPA 1027.4 1028.1 1020.1 1018.1 1015.4 1010.7 1006.1 1008.8 1012.8 1021.9 1023.4 1027.5 1018.3 MAX. QFF PRESSURE IN HPA 1038.7 1043.0 1031.6 1028.7 1025.9 1017.4 1013.1 1012.4 1020.8 1031.3 1030.3 1036.7 1043.0 DAY 22 22 26 12 4 17 21 25 27 13 25 29 MIN. QFF PRESSURE IN HPA 1015.3 1007.3 1007.8 1008.7 1005.6 1001.8 997.8 1001.7 1005.1 1011.7 1012.7 1018.1 997.8 DAY 30 8 17 21 29 24 5 16 2 1 10 17 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 864.9 866.6 863.2 864.9 864.9 864.1 861.2 863.5 864.5 868.5 868.4 869.0 865.3 MAX. QFE PRESSURE IN HPA 872.8 878.0 871.2 874.7 871.5 868.7 867.0 865.8 869.3 874.7 873.7 875.8 878.0 DAY 22 22 26 12 8 17 20 3 27 13 22 29 MIN. QFE PRESSURE IN HPA 857.0 854.3 854.4 856.2 857.8 859.2 854.3 859.4 860.4 862.0 861.2 863.4 854.3 DAY 12 8 17 21 21 24 5 16 5 1 10 20 MEAN QNH PRESSURE IN HPA 1021.4 1023.3 1019.4 1021.4 1021.4 1020.4 1017.1 1019.8 1020.9 1025.5 1025.4 1026.1 1021.8 MAX. QNH PRESSURE IN HPA 1030.4 1036.4 1028.6 1032.6 1028.9 1025.7 1023.8 1022.4 1026.4 1032.6 1031.4 1033.8 1036.4 DAY 22 22 26 12 8 17 20 3 27 13 22 29 MIN. QNH PRESSURE IN HPA 1012.3 1009.2 1009.4 1011.4 1013.2 1014.9 1009.2 1015.1 1016.2 1018.1 1017.1 1019.7 1009.2 DAY 12 8 17 21 21 24 5 16 5 1 10 20 MEAN QFF PRESSURE IN HPA 1026.4 1027.3 1018.9 1017.1 1014.5 1009.9 1005.3 1007.8 1011.4 1019.6 1021.3 1025.2 1017.1 MAX. QFF PRESSURE IN HPA 1037.0 1042.6 1030.3 1026.9 1025.1 1015.9 1011.5 1011.2 1019.6 1028.8 1028.8 1035.6 1042.6 DAY 22 22 26 6 4 17 20 3 27 13 24 29 MIN. QFF PRESSURE IN HPA 1015.9 1008.0 1006.3 1007.0 1005.8 1002.1 997.4 1001.8 1003.5 1009.2 1011.0 1017.8 997.4 DAY 30 8 29 21 29 24 5 16 2 1 10 17 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 863.9 865.5 862.4 863.8 864.0 863.1 859.9 862.1 863.1 867.1 867.1 867.9 864.1 MAX. QFE PRESSURE IN HPA 871.1 877.0 868.2 873.1 870.0 867.3 865.5 864.1 867.7 873.1 872.5 874.1 877.0 DAY 22 22 26 12 3 16 20 8 26 9 24 28 MIN. QFE PRESSURE IN HPA 855.3 854.6 854.1 855.7 858.0 859.0 854.3 858.7 858.5 861.2 861.0 862.5 854.1 DAY 12 14 29 21 21 24 5 12 4 1 10 20 MEAN QNH PRESSURE IN HPA 1020.3 1022.0 1018.5 1020.1 1020.3 1019.3 1015.6 1018.1 1019.4 1023.8 1023.9 1024.8 1020.5 MAX. QNH PRESSURE IN HPA 1028.5 1035.2 1025.2 1030.8 1027.2 1024.1 1022.1 1020.5 1024.6 1030.8 1030.1 1031.9 1035.2 DAY 22 22 26 12 3 16 20 8 26 9 24 28 MIN. QNH PRESSURE IN HPA 1010.4 1009.6 1009.0 1010.8 1013.5 1014.6 1009.2 1014.3 1014.0 1017.1 1016.9 1018.6 1009.0 DAY 12 14 29 21 21 24 5 12 4 1 10 20 MEAN QFF PRESSURE IN HPA 1025.1 1025.9 1017.9 1015.8 1013.6 1009.1 1004.0 1006.2 1010.0 1018.4 1019.9 1023.7 1015.8 MAX. QFF PRESSURE IN HPA 1035.2 1041.1 1026.3 1025.6 1025.2 1015.5 1009.8 1010.0 1018.4 1027.3 1028.2 1033.5 1041.1 DAY 22 22 21 6 3 3 21 8 26 9 24 28 MIN. QFF PRESSURE IN HPA 1014.5 1010.2 1004.2 1006.1 1005.8 1002.5 997.5 1001.0 1002.1 1009.5 1011.3 1015.6 997.5 DAY 30 8 29 17 29 26 5 12 4 1 10 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 864.2 865.5 862.6 863.7 863.7 862.5 859.3 861.7 863.0 867.2 867.5 868.5 864.1 MAX. QFE PRESSURE IN HPA 871.1 877.4 868.5 872.6 870.0 866.7 865.0 863.7 867.7 873.2 872.9 874.7 877.4 DAY 22 22 21 11 3 16 20 6 26 9 21 28 MIN. QFE PRESSURE IN HPA 854.2 855.1 852.9 855.7 857.7 858.6 854.0 858.2 858.6 861.6 861.3 863.1 852.9 DAY 12 7 29 21 21 24 5 12 4 1 9 23 MEAN QNH PRESSURE IN HPA 1020.5 1022.1 1018.7 1019.9 1020.0 1018.6 1015.0 1017.7 1019.2 1024.0 1024.4 1025.5 1020.5 MAX. QNH PRESSURE IN HPA 1028.5 1035.7 1025.5 1030.2 1027.2 1023.4 1021.5 1020.0 1024.6 1030.9 1030.5 1032.6 1035.7 DAY 22 22 21 11 3 16 20 6 26 9 21 28 MIN. QNH PRESSURE IN HPA 1009.1 1010.2 1007.6 1010.8 1013.1 1014.2 1008.9 1013.7 1014.2 1017.6 1017.3 1019.3 1007.6 DAY 12 7 29 21 21 24 5 12 4 1 9 23 MEAN QFF PRESSURE IN HPA 1026.4 1026.8 1019.0 1016.4 1013.9 1008.9 1003.9 1006.7 1011.1 1019.8 1021.6 1025.8 1016.7 MAX. QFF PRESSURE IN HPA 1036.5 1042.0 1028.0 1025.9 1024.8 1014.5 1010.1 1010.3 1019.2 1028.2 1028.9 1034.2 1042.0 DAY 22 22 21 11 3 3 21 6 26 9 24 28 MIN. QFF PRESSURE IN HPA 1014.4 1009.4 1003.5 1007.1 1006.6 1002.2 997.8 1001.3 1004.9 1011.1 1011.9 1016.4 997.8 DAY 12 7 29 21 21 24 4 12 4 1 9 17 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 864.5 866.1 863.4 864.5 864.6 863.2 860.3 862.6 864.0 868.0 868.4 869.0 864.9 MAX. QFE PRESSURE IN HPA 871.1 878.3 869.2 874.0 870.4 867.4 865.6 865.7 868.3 874.3 874.2 875.5 878.3 DAY 22 22 21 11 3 16 20 2 26 13 21 28 MIN. QFE PRESSURE IN HPA 853.2 854.3 855.3 856.7 858.6 860.0 855.1 858.9 860.2 860.9 861.6 862.7 853.2 DAY 12 7 29 22 20 23 5 12 3 1 9 23 MEAN QNH PRESSURE IN HPA 1020.9 1022.7 1019.6 1021.0 1021.0 1019.4 1016.1 1018.7 1020.3 1025.0 1025.4 1026.1 1021.3 MAX. QNH PRESSURE IN HPA 1028.5 1036.7 1026.3 1031.8 1027.7 1024.2 1022.2 1022.3 1025.3 1032.1 1032.0 1033.5 1036.7 DAY 22 22 21 11 3 16 20 2 26 13 21 28 MIN. QNH PRESSURE IN HPA 1008.0 1009.2 1010.4 1012.0 1014.2 1015.8 1010.2 1014.5 1016.0 1016.8 1017.6 1018.9 1008.0 DAY 12 7 29 22 20 23 5 12 3 1 9 23 MEAN QFF PRESSURE IN HPA 1026.7 1027.4 1019.7 1017.1 1014.3 1009.0 1004.4 1007.0 1011.4 1020.2 1022.3 1026.5 1017.2 MAX. QFF PRESSURE IN HPA 1037.0 1043.2 1028.7 1027.2 1025.1 1014.7 1010.3 1011.2 1019.4 1028.8 1029.7 1035.4 1043.2 DAY 22 22 21 11 3 5 20 2 26 13 24 28 MIN. QFF PRESSURE IN HPA 1013.4 1008.3 1007.2 1007.6 1006.9 1002.6 997.7 1001.8 1004.5 1008.4 1011.5 1017.6 997.7 DAY 12 7 29 21 29 23 5 16 3 1 9 17 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 864.5 866.0 863.4 864.7 864.8 863.6 860.9 863.0 864.2 868.3 868.3 869.0 865.1 MAX. QFE PRESSURE IN HPA 871.6 878.0 869.7 874.7 870.8 868.6 865.7 866.2 868.5 874.1 873.6 876.0 878.0 DAY 21 22 21 11 3 16 19 2 26 13 21 28 MIN. QFE PRESSURE IN HPA 853.8 853.6 855.5 857.4 858.6 859.7 855.8 859.1 860.2 862.3 861.9 863.0 853.6 DAY 12 7 29 21 20 26 4 12 4 1 9 23 MEAN QNH PRESSURE IN HPA 1020.9 1022.6 1019.6 1021.1 1021.2 1019.9 1016.8 1019.2 1020.6 1025.2 1025.3 1026.1 1021.6 MAX. QNH PRESSURE IN HPA 1029.0 1036.4 1026.9 1032.6 1028.1 1025.6 1022.3 1022.9 1025.5 1031.9 1031.3 1034.1 1036.4 DAY 21 22 21 11 3 16 19 2 26 13 21 28 MIN. QNH PRESSURE IN HPA 1008.7 1008.4 1010.6 1012.8 1014.2 1015.4 1011.0 1014.7 1016.0 1018.4 1017.9 1019.2 1008.4 DAY 12 7 29 21 20 26 4 12 4 1 9 23 MEAN QFF PRESSURE IN HPA 1025.9 1026.7 1019.1 1016.8 1014.2 1009.3 1005.0 1007.2 1011.1 1019.3 1021.2 1025.3 1016.8 MAX. QFF PRESSURE IN HPA 1035.2 1041.5 1028.4 1027.1 1025.4 1015.2 1010.2 1011.3 1019.0 1028.0 1028.9 1036.1 1041.5 DAY 22 22 21 11 3 5 20 2 26 12 24 28 MIN. QFF PRESSURE IN HPA 1013.6 1006.9 1007.8 1007.9 1005.8 1002.4 999.2 1002.0 1003.5 1009.0 1011.0 1016.9 999.2 DAY 29 7 29 21 20 23 5 12 1 1 9 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.5 4.3 6.6 12.7 19.0 24.4 25.3 27.4 21.3 16.2 7.0 3.4 14.1 MINIMUN AIR TEMPERATURE (C) -1.2 -0.1 1.3 6.4 10.8 16.5 17.9 19.6 13.2 10.1 2.7 -0.8 8.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 9 0 0 0 0 10 DAYS WITH MINIMUM TEMP. <=-4 4 2 0 0 0 0 0 0 0 0 2 5 13 DAYS WITH FREEZING MIN.<= 0 17 17 12 0 0 0 0 0 0 0 9 21 76 TEMPERATURE RECORDS LOWEST(C) -6.4 -4.2 -3.2 2.2 3.6 12.8 15.0 14.0 6.8 2.2 -5.0 -5.6 -6.4 DAY 4 21 6 10 22 5 3 31 29 14 30 6 MAXIMUM AIR TEMPERATURE (C) 5.7 10.0 12.8 19.0 26.9 31.4 31.7 35.0 28.9 22.9 12.9 8.9 20.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 8 24 25 31 13 0 0 0 101 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 10.6 13.8 18.0 26.0 34.6 35.0 37.8 39.0 34.6 29.6 19.0 15.6 39.0 DAY 30 2 8 28 30 21 31 6 7 4 18 29 DIF. BETWEEN (MAX.-MIN.) (C) 6.9 10.1 11.5 12.6 16.1 14.9 13.8 15.4 15.7 12.8 10.2 9.7 12.5 MEAN DAILY TEMP. (MDT) (C) 2.2 5.0 7.0 12.7 18.9 24.0 24.8 27.3 21.0 16.5 7.8 4.0 14.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 18.6 89.1 117.5 195.0 40.3 1.8 0.0 0.0 462.3 HEATING DEG. DAYS(BASE 18 0C) 488.8 364.6 339.9 162.6 32.0 0.0 0.0 0.0 8.8 70.2 306.5 433.4 2206.8 DEWPOINT (MEAN C) -2.5 -3.7 -3.4 0.5 1.9 5.5 8.1 6.6 4.2 1.6 -0.5 -1.9 1.4 MIXING RATIO (G/KG) 3.75 3.47 3.58 4.73 5.26 7.00 8.08 7.53 6.18 5.10 4.34 3.90 5.24 VAPOUR PRESSURE (HPA) 5.19 4.79 4.93 6.51 7.23 9.56 11.02 10.30 8.49 7.04 6.01 5.42 7.21 SATURATION DEF. (HPA) 1.74 3.85 5.18 8.93 16.36 22.33 22.38 27.78 18.40 12.59 4.58 2.63 12.23 RELATIVE HUMIDITY (MEAN %) 77 59 53 48 37 33 36 30 37 42 63 71 49 RELATIVE HUMIDITY (MAX. %) 90 81 74 71 61 50 53 47 56 60 81 86 68 RELATIVE HUMIDITY (MIN. %) 59 37 31 27 18 20 23 17 20 26 42 51 31 RELATIVE HUMIDITY (MEAN% 03UTC) 86 74 70 69 55 47 51 45 54 54 79 82 64 RELATIVE HUMIDITY (MEAN% 09UTC) 64 49 39 33 25 26 29 23 26 30 50 55 37 RELATIVE HUMIDITY (MEAN% 15UTC) 71 50 39 34 25 22 26 20 25 38 56 67 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 39.8 51.7 33.9 18.1 5.0 0.0 1.4 5.0 0.3 27.0 26.8 28.0 237.0 DAYS WITH PRECIPITATION >=10 1 2 1 1 0 0 0 0 0 0 1 1 7 DAYS WITH PRECIPITATION >= 5 2 4 2 1 0 0 0 1 0 2 2 3 17 DAYS WITH PRECIPITATION >= 1 7 6 7 4 2 0 0 1 0 7 3 6 43 DAYS WITH PRECIPITATION 11 8 9 4 2 0 3 1 1 9 5 6 59 GREATEST DAILY PRECIPITATION 19.9 23.1 18.0 13.0 3.0 0.0 0.8 5.0 0.3 9.0 17.0 10.0 23.1 DAY 9 18 11 1 20 ** 15 17 26 30 1 10 DAY WITH THUNDER STORM 0 0 1 2 0 0 0 1 1 2 1 0 8 DAYS WITH SNOW OR SLEET 5 5 1 0 0 0 0 0 0 1 4 0 16 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 1 0 0 1 WIND DIRECTION (PREVAILING) 180 180 180 180 180 180 360 360 180 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 10.4 10.9 11.5 11.7 11.5 11.1 7.7 8.4 9.9 10.9 9.6 9.9 10.7 PREVAILING WIND PERCENT 4.8 35.3 14.9 17.5 15.3 14.6 16.9 10.1 9.6 16.5 15.8 6.0 13.4 CALMS PERCENT OF WIND 85.5 42.4 64.5 55.8 61.3 60.0 64.1 67.7 66.7 61.3 68.3 85.5 65.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 211 192 204 202 206 206 13 246 211 200 194 202 202 VECTOR WIND MAGNITUDE(KNOTS) 0.3 5.7 2.2 3.1 2.6 2.2 1.6 0.4 1.3 2.9 1.9 1.1 1.8 WIND STEADINESES (MEAN %) 27.3 90.5 62.9 67.4 60.5 53.7 55.2 13.3 44.8 72.5 70.4 78.6 52.9 WIND SPEED (MEAN KNOTS) 1.1 6.3 3.5 4.6 4.3 4.1 2.9 3.0 2.9 4.0 2.7 1.4 3.4 FASTEST WIND DIRECTION 190 190 210 210 210 200 20 210 180 180 230 180 190 FASTEST WIND SPEED (KNOTS) 17 25 23 23 23 21 16 19 19 23 21 17 25 DAY 27 3 20 13 7 4 22 29 22 12 16 27 DAYS WITH SKY CLEAR (0-2)/8 13 18 15 16 22 28 28 22 29 18 14 14 237 DAYS WITH P.CLOUDY (3-6)/8 7 7 10 11 9 2 3 9 1 9 11 11 90 DAYS WITH CLOUDY (7-8)/8 11 3 6 3 0 0 0 0 0 4 5 6 38 DAYS WITH VISIBILITY =< 2 KM 6 1 1 1 1 0 0 0 0 2 1 0 13 DURATION OF SUNSHINE HOURS 131.5 203.5 228.0 258.8 294.0 354.9 359.3 298.3 299.1 230.5 167.7 149.6 2975.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.2 864.2 863.3 864.0 863.6 860.9 860.0 861.8 863.6 866.6 867.5 870.3 864.4 MAX. QFE PRESSURE IN HPA 878.4 871.8 870.5 871.0 870.5 866.8 864.2 870.2 869.5 872.0 874.5 876.9 878.4 DAY-HOUR 2- 6 11- 6 18- 9 10- 6 28- 6 16- 6 18- 3 20- 6 28- 6 13- 9 3- 6 5- 6 MIN. QFE PRESSURE IN HPA 856.6 849.4 853.5 854.6 856.1 852.0 854.0 856.9 858.4 862.6 859.6 859.8 849.4 DAY-HOUR 9-12 20-12 21- 0 8- 9 20- 3 24-12 21-15 6-15 12-12 4- 9 26- 3 15-12 MEAN QNH PRESSURE IN HPA 1023.9 1020.6 1019.5 1020.4 1019.9 1016.8 1015.8 1017.8 1019.8 1023.3 1024.4 1027.6 1020.8 MAX. QNH PRESSURE IN HPA 1036.8 1029.3 1027.8 1028.4 1027.8 1023.5 1020.6 1027.4 1026.6 1029.5 1032.4 1035.1 1036.8 DAY-HOUR 2- 6 11- 6 18- 9 10- 6 28- 6 16- 6 18- 3 20- 6 28- 6 13- 9 3- 6 5- 6 MIN. QNH PRESSURE IN HPA 1011.9 1003.6 1008.3 1009.6 1011.3 1006.6 1008.9 1012.2 1013.9 1018.7 1015.3 1015.5 1003.6 DAY-HOUR 9-12 20-12 21- 0 8- 9 20- 3 24-12 21-15 6-15 12-12 4- 9 26- 3 15-12 MEAN QFF PRESSURE IN HPA 1026.8 1021.6 1019.2 1016.5 1012.4 1006.1 1004.6 1005.5 1010.9 1017.2 1023.9 1029.4 1016.2 MAX. QFF PRESSURE IN HPA 1041.3 1032.2 1029.5 1027.4 1021.9 1014.6 1010.5 1016.6 1021.9 1026.0 1036.8 1038.6 1041.3 DAY-HOUR 2- 6 11- 6 18- 9 10- 3 21- 3 17- 3 28- 3 20- 3 28- 3 13-18 30- 6 5- 6 MIN. QFF PRESSURE IN HPA 1014.2 1003.7 1004.6 1005.4 1002.9 993.9 996.3 998.7 1003.3 1009.5 1012.2 1015.5 993.9 DAY-HOUR 9-12 20-12 21- 0 8- 3 20- 0 24-21 21-15 6-12 12-12 10-12 25- 0 15- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 867.1 864.3 863.3 864.2 863.7 861.2 860.2 862.0 863.6 866.5 867.4 870.5 864.5 MAX. QFE PRESSURE IN HPA 876.9 869.9 869.5 869.7 869.1 866.0 863.8 868.8 868.1 870.1 873.4 875.0 876.9 DAY 2 12 5 11 28 16 26 20 28 7 3 6 MIN. QFE PRESSURE IN HPA 857.6 855.3 853.5 857.1 856.6 852.4 855.7 858.4 860.5 863.0 859.9 862.8 852.4 DAY 9 20 21 8 20 25 22 7 7 31 26 14 MEAN QNH PRESSURE IN HPA 1023.9 1020.6 1019.5 1020.6 1019.9 1017.1 1016.0 1018.0 1019.8 1023.2 1024.2 1027.7 1020.9 MAX. QNH PRESSURE IN HPA 1035.1 1027.1 1026.6 1026.9 1026.2 1022.6 1020.1 1025.8 1025.0 1027.3 1031.1 1032.9 1035.1 DAY 2 12 5 11 28 16 26 20 28 7 3 6 MIN. QNH PRESSURE IN HPA 1013.0 1010.4 1008.3 1012.4 1011.9 1007.1 1010.8 1013.9 1016.3 1019.2 1015.6 1019.0 1007.1 DAY 9 20 21 8 20 25 22 7 7 31 26 14 MEAN QFF PRESSURE IN HPA 1026.2 1021.1 1018.7 1016.4 1012.4 1006.4 1004.7 1005.5 1010.5 1016.6 1023.1 1029.0 1015.9 MAX. QFF PRESSURE IN HPA 1038.9 1029.2 1027.4 1025.2 1020.5 1013.1 1009.0 1014.7 1020.3 1025.0 1034.5 1036.4 1038.9 DAY 2 12 19 11 21 17 26 20 28 27 30 6 MIN. QFF PRESSURE IN HPA 1015.3 1009.4 1004.6 1007.7 1002.9 994.4 998.0 1000.0 1005.2 1011.5 1012.2 1018.2 994.4 DAY 9 20 21 8 20 25 22 7 13 10 25 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 867.0 864.4 863.5 864.4 864.1 861.8 861.0 862.6 864.2 867.0 867.5 870.4 864.8 MAX. QFE PRESSURE IN HPA 877.7 870.4 869.6 870.0 869.6 866.7 864.2 869.7 868.8 870.5 873.4 875.2 877.7 DAY 2 11 5 11 28 17 18 20 28 13 3 5 MIN. QFE PRESSURE IN HPA 857.1 854.0 855.2 855.1 856.1 852.6 857.0 859.0 860.9 863.1 859.6 863.1 852.6 DAY 9 20 21 8 20 25 14 13 16 31 26 14 MEAN QNH PRESSURE IN HPA 1023.8 1020.8 1019.8 1020.8 1020.4 1017.9 1016.9 1018.7 1020.5 1023.7 1024.3 1027.7 1021.3 MAX. QNH PRESSURE IN HPA 1036.0 1027.7 1026.7 1027.2 1026.7 1023.4 1020.6 1026.9 1025.8 1027.8 1031.1 1033.2 1036.0 DAY 2 11 5 11 28 17 18 20 28 13 3 5 MIN. QNH PRESSURE IN HPA 1012.4 1008.9 1010.3 1010.2 1011.3 1007.3 1012.3 1014.6 1016.8 1019.3 1015.3 1019.3 1007.3 DAY 9 20 21 8 20 25 14 13 16 31 26 14 MEAN QFF PRESSURE IN HPA 1026.9 1022.3 1019.9 1017.6 1013.6 1007.6 1006.1 1007.1 1012.4 1018.5 1024.5 1030.2 1017.2 MAX. QFF PRESSURE IN HPA 1040.6 1030.6 1028.3 1027.4 1021.9 1014.6 1010.5 1016.6 1021.9 1025.4 1035.9 1037.6 1040.6 DAY 2 11 5 10 21 17 28 20 28 14 30 5 MIN. QFF PRESSURE IN HPA 1015.0 1008.8 1008.0 1005.4 1003.0 995.7 999.1 1002.2 1007.4 1011.9 1013.6 1019.2 995.7 DAY 9 20 21 8 20 25 22 7 13 12 25 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 868.0 865.2 864.3 864.7 864.4 862.0 861.3 862.9 864.6 867.7 868.5 871.3 865.4 MAX. QFE PRESSURE IN HPA 878.4 871.8 870.1 871.0 870.5 866.8 864.0 870.2 869.5 871.8 874.5 876.9 878.4 DAY 2 11 18 10 28 16 18 20 28 13 3 5 MIN. QFE PRESSURE IN HPA 857.2 853.2 857.0 855.1 860.3 853.2 857.0 859.4 861.0 864.4 861.5 862.4 853.2 DAY 9 20 21 8 14 25 21 7 15 12 26 15 MEAN QNH PRESSURE IN HPA 1024.9 1021.7 1020.6 1021.2 1020.7 1018.1 1017.2 1019.1 1021.0 1024.6 1025.5 1028.7 1022.0 MAX. QNH PRESSURE IN HPA 1036.8 1029.3 1027.3 1028.4 1027.8 1023.5 1020.3 1027.4 1026.6 1029.3 1032.4 1035.1 1036.8 DAY 2 11 18 10 28 16 18 20 28 13 3 5 MIN. QNH PRESSURE IN HPA 1012.6 1008.0 1012.3 1010.2 1016.1 1008.0 1012.3 1015.1 1016.9 1020.8 1017.5 1018.5 1008.0 DAY 9 20 21 8 14 25 21 7 15 12 26 15 MEAN QFF PRESSURE IN HPA 1028.2 1023.4 1020.7 1017.3 1013.0 1007.2 1006.0 1006.7 1012.0 1018.7 1025.3 1031.2 1017.5 MAX. QFF PRESSURE IN HPA 1041.3 1032.2 1029.1 1027.4 1020.3 1013.8 1010.1 1016.1 1021.5 1025.6 1036.8 1038.6 1041.3 DAY 2 11 18 10 21 16 27 20 28 27 30 5 MIN. QFF PRESSURE IN HPA 1015.4 1007.9 1010.2 1006.9 1005.7 996.6 999.6 1001.9 1006.6 1012.5 1014.6 1018.1 996.6 DAY 9 20 21 8 18 25 21 6 12 12 25 15 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 867.5 864.7 863.7 864.1 863.8 861.3 860.5 862.1 863.7 866.9 867.8 870.5 864.7 MAX. QFE PRESSURE IN HPA 877.4 871.2 870.5 871.0 869.5 866.3 863.2 869.0 868.7 872.0 873.4 876.2 877.4 DAY 2 11 18 10 28 16 28 20 28 13 30 5 MIN. QFE PRESSURE IN HPA 857.2 850.7 856.5 854.6 859.2 852.9 857.0 858.5 859.0 862.6 861.8 860.3 850.7 DAY 9 20 21 8 19 25 21 6 7 4 26 15 MEAN QNH PRESSURE IN HPA 1024.4 1021.1 1020.0 1020.5 1020.2 1017.3 1016.4 1018.2 1020.0 1023.6 1024.7 1027.8 1021.2 MAX. QNH PRESSURE IN HPA 1035.7 1028.6 1027.8 1028.4 1026.6 1023.0 1019.4 1026.1 1025.7 1029.5 1031.1 1034.3 1035.7 DAY 2 11 18 10 28 16 28 20 28 13 30 5 MIN. QNH PRESSURE IN HPA 1012.6 1005.1 1011.8 1009.6 1014.9 1007.6 1012.3 1014.0 1014.6 1018.7 1017.8 1016.1 1005.1 DAY 9 20 21 8 19 25 21 6 7 4 26 15 MEAN QFF PRESSURE IN HPA 1027.0 1021.8 1019.4 1016.1 1012.3 1006.4 1004.9 1005.5 1010.6 1017.0 1023.7 1029.0 1016.1 MAX. QFF PRESSURE IN HPA 1039.7 1030.5 1029.5 1026.4 1019.7 1012.5 1008.7 1015.0 1019.9 1025.6 1035.4 1037.2 1039.7 DAY 2 11 18 10 1 16 28 20 28 25 30 5 MIN. QFF PRESSURE IN HPA 1015.0 1004.7 1008.3 1007.4 1005.5 995.5 999.5 1000.9 1003.6 1009.8 1013.5 1015.5 995.5 DAY 9 20 20 13 19 24 21 7 7 10 25 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 866.3 863.1 862.4 863.2 862.9 860.1 859.0 860.8 862.4 865.6 866.7 869.3 863.5 MAX. QFE PRESSURE IN HPA 876.2 869.2 869.8 869.3 869.4 865.0 862.2 867.0 867.3 870.4 872.2 875.0 876.2 DAY 2 11 18 10 28 16 18 20 28 13 30 5 MIN. QFE PRESSURE IN HPA 856.6 849.4 855.7 855.9 857.9 852.0 855.0 857.1 858.4 862.6 861.3 859.8 849.4 DAY 9 20 26 8 19 24 21 6 12 12 25 15 MEAN QNH PRESSURE IN HPA 1023.0 1019.4 1018.5 1019.4 1019.0 1015.9 1014.6 1016.7 1018.5 1022.2 1023.4 1026.4 1019.8 MAX. QNH PRESSURE IN HPA 1034.3 1026.3 1027.0 1026.4 1026.5 1021.5 1018.3 1023.8 1024.1 1027.7 1029.7 1032.9 1034.3 DAY 2 11 18 10 28 16 18 20 28 13 30 5 MIN. QNH PRESSURE IN HPA 1011.9 1003.6 1010.8 1011.1 1013.4 1006.6 1010.0 1012.4 1013.9 1018.7 1017.3 1015.5 1003.6 DAY 9 20 26 8 19 24 21 6 12 12 25 15 MEAN QFF PRESSURE IN HPA 1025.3 1019.8 1017.7 1015.1 1011.5 1005.1 1003.3 1004.2 1009.3 1015.8 1022.3 1027.6 1014.8 MAX. QFF PRESSURE IN HPA 1038.7 1028.4 1029.1 1024.6 1018.7 1010.9 1007.7 1012.8 1018.5 1024.3 1034.4 1035.9 1038.7 DAY 2 11 18 10 1 16 28 20 28 25 30 5 MIN. QFF PRESSURE IN HPA 1014.2 1003.7 1008.2 1007.0 1004.5 994.8 997.2 998.7 1003.3 1009.5 1013.6 1015.6 994.8 DAY 9 20 21 13 19 24 21 6 12 10 25 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.7 863.4 862.4 863.1 862.7 859.7 858.5 860.5 862.5 865.8 867.2 869.8 863.5 MAX. QFE PRESSURE IN HPA 875.6 869.2 867.8 869.4 869.7 864.5 862.0 866.9 867.3 870.2 872.7 874.9 875.6 DAY 2 11 18 10 28 16 18 19 30 13 2 5 MIN. QFE PRESSURE IN HPA 858.8 849.6 856.7 857.3 857.0 852.7 854.0 856.9 858.9 862.8 861.1 860.4 849.6 DAY 9 20 21 13 13 24 21 6 12 10 25 15 MEAN QNH PRESSURE IN HPA 1023.4 1019.7 1018.5 1019.3 1018.8 1015.4 1014.1 1016.3 1018.7 1022.3 1024.0 1027.0 1019.8 MAX. QNH PRESSURE IN HPA 1033.6 1026.3 1024.7 1026.5 1026.9 1020.9 1018.1 1023.7 1024.1 1027.4 1030.3 1032.8 1033.6 DAY 2 11 18 10 28 16 18 19 30 13 2 5 MIN. QNH PRESSURE IN HPA 1014.4 1003.9 1012.0 1012.7 1012.3 1007.4 1008.9 1012.2 1014.5 1019.0 1017.0 1016.2 1003.9 DAY 9 20 21 13 13 24 21 6 12 10 25 15 MEAN QFF PRESSURE IN HPA 1026.5 1021.2 1018.6 1016.0 1011.9 1005.1 1003.3 1004.8 1010.6 1017.2 1024.2 1029.4 1015.7 MAX. QFF PRESSURE IN HPA 1039.2 1029.1 1027.5 1025.8 1019.1 1011.3 1008.2 1012.6 1018.7 1025.0 1035.3 1037.8 1039.2 DAY 2 11 18 10 1 16 27 20 27 26 30 5 MIN. QFF PRESSURE IN HPA 1017.1 1005.6 1010.1 1009.1 1004.6 996.3 996.3 999.7 1005.6 1010.4 1014.7 1016.7 996.3 DAY 9 20 21 1 13 24 21 6 11 10 25 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 867.3 864.2 863.4 864.2 863.6 860.5 859.5 861.6 863.8 866.6 867.7 870.5 864.4 MAX. QFE PRESSURE IN HPA 875.2 870.1 869.7 869.7 870.3 866.0 862.8 868.4 868.4 870.7 873.4 875.5 875.5 DAY 1 11 18 10 28 16 17 19 30 13 2 5 MIN. QFE PRESSURE IN HPA 859.2 854.3 856.5 858.8 857.8 852.7 854.8 858.0 860.5 864.1 861.6 860.6 852.7 DAY 8 20 20 1 13 24 21 6 15 10 25 15 MEAN QNH PRESSURE IN HPA 1024.2 1020.6 1019.7 1020.6 1019.9 1016.4 1015.2 1017.6 1020.1 1023.3 1024.6 1027.8 1020.8 MAX. QNH PRESSURE IN HPA 1033.2 1027.3 1026.9 1026.9 1027.6 1022.6 1019.0 1025.4 1025.4 1028.0 1031.1 1033.5 1033.5 DAY 1 11 18 10 28 16 17 19 30 13 2 5 MIN. QNH PRESSURE IN HPA 1014.9 1009.2 1011.8 1014.4 1013.2 1007.4 1009.8 1013.5 1016.3 1020.5 1017.6 1016.5 1007.4 DAY 8 20 20 1 13 24 21 6 15 10 25 15 MEAN QFF PRESSURE IN HPA 1027.5 1022.2 1019.6 1016.7 1012.2 1005.5 1003.9 1005.3 1011.2 1017.5 1024.5 1030.1 1016.3 MAX. QFF PRESSURE IN HPA 1038.7 1030.6 1029.3 1025.3 1020.0 1012.7 1008.8 1013.9 1019.4 1026.0 1035.7 1038.3 1038.7 DAY 2 11 18 10 1 16 16 19 27 13 30 5 MIN. QFF PRESSURE IN HPA 1017.3 1010.4 1009.1 1009.7 1005.1 995.2 996.8 1000.2 1005.6 1012.4 1014.8 1016.9 995.2 DAY 8 3 20 13 13 24 21 6 10 10 24 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 867.4 864.4 863.4 864.5 863.9 861.0 860.2 862.0 863.8 866.6 867.8 870.4 864.6 MAX. QFE PRESSURE IN HPA 876.2 870.1 869.3 869.7 870.1 866.0 863.4 869.0 869.0 870.3 873.4 875.2 876.2 DAY 1 11 18 10 28 16 27 19 30 6 2 5 MIN. QFE PRESSURE IN HPA 858.2 855.9 854.5 858.7 858.4 852.4 855.3 858.8 860.4 863.3 860.7 861.9 852.4 DAY 8 20 20 7 19 24 21 6 11 30 25 15 MEAN QNH PRESSURE IN HPA 1024.2 1020.7 1019.7 1021.0 1020.3 1016.9 1016.0 1018.0 1020.1 1023.3 1024.7 1027.7 1021.1 MAX. QNH PRESSURE IN HPA 1034.3 1027.3 1026.4 1026.9 1027.3 1022.6 1019.7 1026.1 1026.1 1027.6 1031.1 1033.2 1034.3 DAY 1 11 18 10 28 16 27 19 30 6 2 5 MIN. QNH PRESSURE IN HPA 1013.7 1011.1 1009.5 1014.3 1013.9 1007.1 1010.4 1014.4 1016.2 1019.5 1016.6 1017.9 1007.1 DAY 8 20 20 7 19 24 21 6 11 30 25 15 MEAN QFF PRESSURE IN HPA 1026.8 1021.4 1018.9 1016.5 1012.3 1006.1 1004.5 1005.4 1010.8 1016.8 1023.7 1028.9 1016.0 MAX. QFF PRESSURE IN HPA 1037.6 1029.5 1028.8 1024.9 1020.7 1012.4 1008.5 1014.7 1019.9 1025.5 1034.3 1036.5 1037.6 DAY 2 11 18 10 20 16 27 19 27 13 29 5 MIN. QFF PRESSURE IN HPA 1016.6 1011.4 1005.7 1010.3 1004.3 993.9 997.5 1000.1 1004.5 1011.3 1012.8 1017.6 993.9 DAY 8 19 20 7 19 24 21 6 10 10 24 13 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.1 1.2 5.6 14.4 18.8 23.2 27.7 26.4 21.3 13.3 6.3 3.0 13.4 MINIMUN AIR TEMPERATURE (C) -3.3 -2.8 -0.0 8.2 11.3 14.4 19.5 18.2 12.9 7.3 1.7 -0.0 7.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 7 5 0 0 0 0 12 DAYS WITH MINIMUM TEMP. <=-4 11 9 5 0 0 0 0 0 0 0 0 3 28 DAYS WITH FREEZING MIN.<= 0 24 22 17 0 0 0 0 0 0 0 10 14 87 TEMPERATURE RECORDS LOWEST(C) -14.6 -10.4 -7.6 2.8 6.0 10.0 16.0 12.8 11.0 2.8 -2.8 -6.0 -14.6 DAY 17 9 16 11 11 14 1 31 25 30 17 29 MAXIMUM AIR TEMPERATURE (C) 4.1 6.3 11.4 20.3 25.6 30.8 35.3 33.8 29.4 20.1 11.9 7.3 19.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 3 19 31 29 15 0 0 0 97 DAYS WITH MAXIMUM TEMP. <= 0 6 2 0 0 0 0 0 0 0 0 0 0 8 TEMPERATURE RECORDS HIGHEST(C) 13.8 13.6 18.4 26.0 31.0 37.2 39.4 39.4 34.0 27.0 17.4 13.6 39.4 DAY 3 24 29 14 25 29 21 2 6 11 13 1 DIF. BETWEEN (MAX.-MIN.) (C) 7.4 9.1 11.4 12.1 14.3 16.4 15.8 15.6 16.5 12.8 10.2 7.3 12.4 MEAN DAILY TEMP. (MDT) (C) 0.4 1.7 5.7 14.3 18.4 22.6 27.4 26.0 21.2 13.7 6.8 3.6 13.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.4 62.5 197.4 155.1 18.0 0.0 0.0 0.0 434.4 HEATING DEG. DAYS(BASE 18 0C) 545.1 472.2 381.5 114.9 24.8 2.5 0.0 0.0 0.0 133.5 335.5 445.7 2455.8 DEWPOINT (MEAN C) -5.5 -5.9 -4.4 2.0 2.1 2.2 6.1 4.3 2.3 2.4 0.2 -1.4 0.4 MIXING RATIO (G/KG) 3.06 2.92 3.40 5.29 5.31 5.44 7.16 6.58 5.47 5.41 4.56 4.04 4.89 VAPOUR PRESSURE (HPA) 4.23 4.05 4.68 7.28 7.30 7.46 9.79 9.01 7.52 7.48 6.32 5.60 6.73 SATURATION DEF. (HPA) 2.24 2.90 4.92 9.82 15.52 22.56 28.94 26.91 19.09 8.56 3.50 2.13 12.26 RELATIVE HUMIDITY (MEAN %) 69 63 54 47 37 29 28 28 32 52 68 75 49 RELATIVE HUMIDITY (MAX. %) 86 81 74 68 58 45 43 44 49 71 86 88 66 RELATIVE HUMIDITY (MIN. %) 52 43 33 28 20 16 17 16 18 34 48 57 32 RELATIVE HUMIDITY (MEAN% 03UTC) 77 74 71 64 55 42 42 42 46 68 82 82 62 RELATIVE HUMIDITY (MEAN% 09UTC) 61 52 40 37 27 23 21 22 25 41 54 63 39 RELATIVE HUMIDITY (MEAN% 15UTC) 65 54 42 33 24 18 18 18 23 44 61 73 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 42.6 31.8 51.1 48.9 8.1 0.0 3.0 0.0 3.4 45.1 21.5 57.8 313.3 DAYS WITH PRECIPITATION >=10 0 2 2 1 0 0 0 0 0 2 0 1 8 DAYS WITH PRECIPITATION >= 5 2 2 3 3 0 0 0 0 0 4 1 4 19 DAYS WITH PRECIPITATION >= 1 11 3 6 7 3 0 2 0 2 6 5 8 53 DAYS WITH PRECIPITATION 16 9 7 11 4 0 2 0 3 8 7 13 80 GREATEST DAILY PRECIPITATION 6.6 19.0 21.0 18.0 4.0 0.0 2.0 0.0 2.0 17.3 9.0 19.1 21.0 DAY 5 13 23 29 9 ** 15 ** 29 24 24 21 DAY WITH THUNDER STORM 0 0 1 3 1 0 0 0 1 4 0 1 11 DAYS WITH SNOW OR SLEET 13 7 3 0 0 0 0 0 0 0 0 6 29 DAYS WITH DUST 1 0 0 2 0 0 0 0 0 0 0 0 3 WIND DIRECTION (PREVAILING) 180 180 180 180 225 360 45 180 180 180 360 180 180 PREVAILING WIND SPEED(KNOTS) 12.2 9.4 11.7 11.9 12.5 7.2 7.9 10.4 10.8 9.4 5.8 11.0 11.0 PREVAILING WIND PERCENT 27.4 22.0 20.6 22.5 18.1 8.8 14.9 10.5 12.9 8.5 4.6 19.4 14.3 CALMS PERCENT OF WIND 57.7 61.6 57.7 53.8 56.9 67.5 69.0 63.7 67.1 75.4 88.3 69.8 65.7 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 192 192 196 201 201 244 19 208 199 208 332 193 198 VECTOR WIND MAGNITUDE(KNOTS) 4.0 2.4 3.7 4.7 4.1 0.4 1.9 0.7 1.6 0.3 0.1 2.4 1.8 WIND STEADINESES (MEAN %) 85.1 70.6 82.2 88.7 85.4 14.8 79.2 21.2 51.6 15.0 12.5 82.8 54.5 WIND SPEED (MEAN KNOTS) 4.7 3.4 4.5 5.3 4.8 2.7 2.4 3.3 3.1 2.0 0.8 2.9 3.3 FASTEST WIND DIRECTION 180 180 190 200 210 210 360 210 190 190 180 180 180 FASTEST WIND SPEED (KNOTS) 31 23 21 29 25 17 16 21 23 16 14 23 31 DAY 19 6 11 8 19 4 11 26 28 19 27 20 DAYS WITH SKY CLEAR (0-2)/8 11 17 17 9 22 28 25 31 27 17 13 8 225 DAYS WITH P.CLOUDY (3-6)/8 9 7 10 15 8 2 6 0 3 11 9 15 95 DAYS WITH CLOUDY (7-8)/8 11 5 4 6 1 0 0 0 0 3 8 8 46 DAYS WITH VISIBILITY =< 2 KM 1 1 1 1 0 0 0 0 0 1 0 1 6 DURATION OF SUNSHINE HOURS 131.3 196.0 236.2 220.9 296.7 372.9 342.0 347.3 294.4 230.6 159.1 132.4 2959.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 864.1 865.5 863.8 864.0 862.6 861.3 861.1 861.8 863.1 867.1 869.2 866.7 864.2 MAX. QFE PRESSURE IN HPA 874.4 874.0 871.2 870.5 866.7 868.8 868.3 867.3 868.0 872.0 876.9 874.3 876.9 DAY-HOUR 30- 9 10-21 26-21 2- 6 11- 3 13- 6 30- 6 8- 6 9- 6 30- 6 17- 6 4- 6 MIN. QFE PRESSURE IN HPA 849.6 853.8 852.3 856.6 856.3 856.9 853.5 855.8 857.2 863.6 863.9 857.9 849.6 DAY-HOUR 21- 3 6-21 24-15 9-12 19-15 23-15 10-15 30-12 6-12 23-12 22-12 21- 3 MEAN QNH PRESSURE IN HPA 1020.4 1022.0 1020.1 1020.3 1018.8 1017.3 1017.1 1017.9 1019.3 1023.9 1026.3 1023.5 1020.6 MAX. QNH PRESSURE IN HPA 1032.2 1031.8 1028.6 1027.8 1023.4 1025.8 1025.3 1024.1 1024.9 1029.5 1035.1 1032.1 1035.1 DAY-HOUR 30- 9 10-21 26-21 2- 6 11- 3 13- 6 30- 6 8- 6 9- 6 30- 6 17- 6 4- 6 MIN. QNH PRESSURE IN HPA 1003.9 1008.7 1007.0 1011.9 1011.5 1012.2 1008.3 1011.0 1012.6 1019.9 1020.2 1013.4 1003.9 DAY-HOUR 21- 3 6-21 24-15 9-12 19-15 23-15 10-15 30-12 6-12 23-12 22-12 21- 3 MEAN QFF PRESSURE IN HPA 1024.1 1025.1 1020.4 1015.3 1011.3 1007.4 1004.7 1006.2 1010.4 1019.5 1026.2 1025.3 1016.3 MAX. QFF PRESSURE IN HPA 1039.5 1038.8 1031.6 1024.5 1019.4 1019.1 1012.9 1014.3 1017.0 1028.0 1037.7 1037.9 1039.5 DAY-HOUR 30-18 10- 6 1- 6 2- 6 10- 3 13- 6 31- 3 8- 3 25- 3 29- 6 17- 6 29- 6 MIN. QFF PRESSURE IN HPA 1005.6 1009.5 1005.8 1005.3 1003.8 1001.6 996.4 1000.2 1001.8 1013.4 1018.0 1013.8 996.4 DAY-HOUR 21- 3 6-21 24-15 14-12 19-15 19- 6 10-15 2-18 6-12 13-12 13-12 20-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 864.2 865.4 863.7 864.0 862.7 861.6 861.3 862.1 863.1 867.1 869.4 866.6 864.3 MAX. QFE PRESSURE IN HPA 873.5 873.4 871.0 869.4 866.3 867.1 866.8 866.2 866.4 870.6 875.9 873.4 875.9 DAY 31 11 27 2 11 13 31 9 23 29 17 29 MIN. QFE PRESSURE IN HPA 851.0 855.0 854.6 858.8 858.9 857.8 855.6 857.0 858.2 863.6 865.6 858.1 851.0 DAY 21 7 24 21 19 26 11 31 1 24 22 21 MEAN QNH PRESSURE IN HPA 1020.6 1021.9 1020.0 1020.4 1018.8 1017.6 1017.3 1018.1 1019.3 1023.9 1026.5 1023.3 1020.6 MAX. QNH PRESSURE IN HPA 1031.2 1031.1 1028.4 1026.5 1023.0 1023.9 1023.5 1022.9 1023.1 1027.9 1034.0 1031.1 1034.0 DAY 31 11 27 2 11 13 31 9 23 29 17 29 MIN. QNH PRESSURE IN HPA 1005.5 1010.0 1009.6 1014.4 1014.5 1013.2 1010.7 1012.3 1013.7 1019.9 1022.2 1013.6 1005.5 DAY 21 7 24 21 19 26 11 31 1 24 22 21 MEAN QFF PRESSURE IN HPA 1023.8 1024.4 1020.0 1015.0 1011.3 1007.8 1004.8 1006.2 1010.2 1019.1 1025.9 1024.7 1016.1 MAX. QFF PRESSURE IN HPA 1037.6 1035.9 1030.9 1023.1 1018.1 1017.2 1011.0 1012.1 1014.5 1025.7 1035.0 1036.1 1037.6 DAY 31 11 1 2 10 13 31 8 29 29 17 29 MIN. QFF PRESSURE IN HPA 1007.0 1011.6 1008.3 1006.5 1006.0 1003.5 998.4 1000.6 1003.8 1014.0 1019.2 1014.3 998.4 DAY 21 7 24 15 19 19 11 4 7 23 13 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 863.9 865.4 863.9 864.3 863.2 862.3 862.2 862.7 863.6 867.4 869.3 866.5 864.6 MAX. QFE PRESSURE IN HPA 873.1 872.2 870.0 869.9 866.7 868.1 867.6 867.0 867.6 871.0 876.3 873.2 876.3 DAY 31 11 27 2 11 13 31 8 23 29 17 29 MIN. QFE PRESSURE IN HPA 849.6 856.5 853.8 858.1 858.1 858.4 856.3 858.0 859.0 863.9 865.0 857.9 849.6 DAY 21 7 24 10 19 19 11 31 3 24 22 21 MEAN QNH PRESSURE IN HPA 1020.2 1022.0 1020.2 1020.6 1019.5 1018.4 1018.3 1018.9 1019.9 1024.2 1026.4 1023.2 1021.0 MAX. QNH PRESSURE IN HPA 1030.8 1029.7 1027.2 1027.1 1023.4 1025.0 1024.5 1023.8 1024.5 1028.4 1034.4 1030.9 1034.4 DAY 31 11 27 2 11 13 31 8 23 29 17 29 MIN. QNH PRESSURE IN HPA 1003.9 1011.8 1008.7 1013.6 1013.6 1013.9 1011.5 1013.5 1014.6 1020.2 1021.5 1013.4 1003.9 DAY 21 7 24 10 19 19 11 31 3 24 22 21 MEAN QFF PRESSURE IN HPA 1024.2 1025.6 1021.3 1016.2 1012.5 1008.9 1006.4 1007.8 1011.9 1020.6 1026.9 1025.5 1017.3 MAX. QFF PRESSURE IN HPA 1038.7 1037.2 1031.0 1024.5 1019.4 1018.6 1012.9 1014.3 1017.0 1027.5 1037.0 1036.5 1038.7 DAY 31 10 1 2 10 13 31 8 25 29 17 29 MIN. QFF PRESSURE IN HPA 1005.6 1015.3 1007.6 1008.2 1005.9 1003.7 997.9 1001.6 1005.6 1015.6 1020.4 1014.4 997.9 DAY 21 7 24 15 19 19 11 4 7 12 13 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 864.9 866.3 864.7 864.9 863.6 862.4 862.5 863.1 864.3 868.2 870.2 867.6 865.2 MAX. QFE PRESSURE IN HPA 874.0 873.3 871.1 870.5 866.7 868.8 868.3 867.3 868.0 872.0 876.9 874.3 876.9 DAY 31 10 27 2 11 13 30 8 9 30 17 4 MIN. QFE PRESSURE IN HPA 852.2 858.2 854.2 859.0 858.2 858.1 857.2 858.4 859.8 865.0 865.9 859.4 852.2 DAY 21 6 24 21 19 26 11 31 3 23 22 21 MEAN QNH PRESSURE IN HPA 1021.4 1023.0 1021.1 1021.3 1019.9 1018.5 1018.6 1019.3 1020.7 1025.1 1027.4 1024.4 1021.7 MAX. QNH PRESSURE IN HPA 1031.8 1031.0 1028.5 1027.8 1023.4 1025.8 1025.3 1024.1 1024.9 1029.5 1035.1 1032.1 1035.1 DAY 31 10 27 2 11 13 30 8 9 30 17 4 MIN. QNH PRESSURE IN HPA 1006.8 1013.7 1009.1 1014.6 1013.7 1013.6 1012.6 1013.9 1015.5 1021.5 1022.5 1015.1 1006.8 DAY 21 6 24 21 19 26 11 31 3 23 22 21 MEAN QFF PRESSURE IN HPA 1025.5 1026.5 1021.7 1016.4 1012.3 1008.4 1006.0 1007.6 1011.7 1020.9 1027.7 1026.7 1017.6 MAX. QFF PRESSURE IN HPA 1039.3 1038.8 1031.6 1024.5 1018.0 1019.1 1012.8 1013.9 1016.2 1028.0 1037.7 1037.9 1039.3 DAY 30 10 1 2 10 13 30 8 29 29 17 29 MIN. QFF PRESSURE IN HPA 1009.0 1014.9 1008.1 1008.5 1005.9 1001.6 999.3 1001.0 1005.0 1015.5 1021.1 1016.4 999.3 DAY 21 6 24 15 26 19 11 4 7 12 13 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 864.1 865.8 864.1 864.3 863.0 861.7 861.6 862.3 863.3 867.3 869.4 867.0 864.5 MAX. QFE PRESSURE IN HPA 874.4 873.3 870.3 869.5 866.5 867.8 867.5 866.7 867.0 871.1 875.3 873.4 875.3 DAY 30 10 27 2 10 13 30 8 25 29 17 4 MIN. QFE PRESSURE IN HPA 852.0 857.0 853.0 858.9 857.0 857.9 856.6 857.0 859.2 863.9 865.3 860.4 852.0 DAY 19 6 24 9 19 26 10 30 3 23 22 21 MEAN QNH PRESSURE IN HPA 1020.5 1022.4 1020.5 1020.7 1019.2 1017.8 1017.6 1018.4 1019.6 1024.2 1026.6 1023.8 1020.9 MAX. QNH PRESSURE IN HPA 1032.2 1031.0 1027.6 1026.6 1023.2 1024.7 1024.3 1023.4 1023.8 1028.5 1033.3 1031.1 1033.3 DAY 30 10 27 2 10 13 30 8 25 29 17 4 MIN. QNH PRESSURE IN HPA 1006.6 1012.3 1007.7 1014.5 1012.3 1013.4 1011.9 1012.3 1014.9 1020.2 1021.8 1016.2 1006.6 DAY 19 6 24 9 19 26 10 30 3 23 22 21 MEAN QFF PRESSURE IN HPA 1023.8 1025.2 1020.4 1015.4 1011.3 1007.7 1005.0 1006.3 1010.2 1019.3 1026.1 1025.2 1016.3 MAX. QFF PRESSURE IN HPA 1038.7 1037.2 1031.0 1023.1 1018.8 1018.2 1011.6 1012.9 1014.9 1025.8 1034.6 1035.3 1038.7 DAY 30 10 15 2 10 13 30 8 25 30 17 29 MIN. QFF PRESSURE IN HPA 1008.1 1013.2 1007.4 1008.1 1004.4 1003.0 998.5 1000.6 1003.9 1014.2 1018.6 1016.7 998.5 DAY 19 6 24 21 19 19 8 3 6 23 13 20 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 863.2 864.6 862.9 863.2 861.9 860.4 860.3 860.9 862.0 866.2 868.3 866.1 863.3 MAX. QFE PRESSURE IN HPA 873.5 872.2 868.3 866.9 866.1 866.4 866.3 865.5 865.5 870.0 873.2 872.1 873.5 DAY 30 10 3 2 6 13 30 8 28 15 17 4 MIN. QFE PRESSURE IN HPA 852.0 855.0 852.5 856.6 856.7 856.9 854.5 855.8 857.2 863.6 863.9 859.4 852.0 DAY 19 6 24 9 19 26 10 30 6 23 22 20 MEAN QNH PRESSURE IN HPA 1019.4 1021.1 1019.1 1019.5 1018.0 1016.2 1016.1 1016.7 1018.0 1022.8 1025.2 1022.8 1019.6 MAX. QNH PRESSURE IN HPA 1031.2 1029.7 1025.3 1023.7 1022.7 1023.1 1023.0 1022.1 1022.1 1027.2 1030.9 1029.6 1031.2 DAY 30 10 3 2 6 13 30 8 28 15 17 4 MIN. QNH PRESSURE IN HPA 1006.6 1010.0 1007.2 1011.9 1012.0 1012.2 1009.5 1011.0 1012.6 1019.9 1020.2 1015.1 1006.6 DAY 19 6 24 9 19 26 10 30 6 23 22 20 MEAN QFF PRESSURE IN HPA 1022.6 1023.5 1019.0 1014.1 1010.4 1006.4 1003.6 1004.9 1008.9 1018.0 1024.6 1024.2 1015.0 MAX. QFF PRESSURE IN HPA 1037.7 1034.9 1029.0 1019.9 1018.2 1017.0 1010.2 1011.3 1014.9 1024.3 1032.0 1033.2 1037.7 DAY 30 10 15 2 10 13 30 8 29 15 17 29 MIN. QFF PRESSURE IN HPA 1009.4 1010.2 1007.1 1005.3 1003.9 1002.2 997.1 1000.2 1001.8 1013.4 1018.0 1015.4 997.1 DAY 19 6 24 14 19 26 10 30 6 13 13 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 863.7 865.0 863.2 863.1 861.4 860.0 859.6 860.5 862.0 866.4 868.6 866.6 863.3 MAX. QFE PRESSURE IN HPA 873.6 872.6 869.3 866.9 865.3 866.0 865.3 864.8 865.5 871.0 874.0 872.7 874.0 DAY 30 10 26 1 10 13 30 8 28 15 16 28 MIN. QFE PRESSURE IN HPA 855.0 854.4 852.3 856.6 856.3 856.9 853.5 856.0 857.8 863.6 863.9 859.4 852.3 DAY 19 6 24 9 19 23 10 30 3 23 30 20 MEAN QNH PRESSURE IN HPA 1019.9 1021.5 1019.4 1019.3 1017.4 1015.7 1015.3 1016.3 1018.1 1023.1 1025.7 1023.3 1019.6 MAX. QNH PRESSURE IN HPA 1031.3 1030.2 1026.4 1023.7 1021.8 1022.6 1021.8 1021.3 1022.1 1028.4 1031.8 1030.3 1031.8 DAY 30 10 26 1 10 13 30 8 28 15 16 28 MIN. QNH PRESSURE IN HPA 1010.0 1009.4 1007.0 1011.9 1011.5 1012.2 1008.3 1011.2 1013.2 1019.9 1020.2 1015.1 1007.0 DAY 19 6 24 9 19 23 10 30 3 23 30 20 MEAN QFF PRESSURE IN HPA 1024.0 1025.0 1020.3 1014.9 1010.4 1006.2 1003.4 1005.3 1010.0 1019.5 1026.1 1025.6 1015.9 MAX. QFF PRESSURE IN HPA 1039.1 1037.2 1029.0 1020.6 1017.8 1016.7 1009.9 1011.4 1014.5 1025.9 1034.0 1035.2 1039.1 DAY 30 10 15 1 10 13 30 8 29 15 16 29 MIN. QFF PRESSURE IN HPA 1012.2 1010.8 1005.8 1006.4 1003.8 1002.0 996.4 1000.5 1004.0 1014.9 1019.8 1015.5 996.4 DAY 20 6 24 14 19 27 10 2 6 13 13 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 864.4 865.6 863.9 864.1 862.4 861.0 860.5 861.4 863.1 867.1 869.3 866.9 864.1 MAX. QFE PRESSURE IN HPA 874.0 873.5 871.0 869.0 866.1 865.6 866.0 865.9 865.9 870.7 874.8 873.6 874.8 DAY 30 10 26 1 10 13 30 8 28 15 16 28 MIN. QFE PRESSURE IN HPA 853.0 854.4 854.4 858.4 857.2 858.0 854.6 857.2 859.0 864.0 864.5 859.6 853.0 DAY 20 6 24 9 19 25 10 30 2 24 30 20 MEAN QNH PRESSURE IN HPA 1020.7 1022.2 1020.3 1020.4 1018.5 1016.9 1016.4 1017.4 1019.3 1023.9 1026.4 1023.7 1020.5 MAX. QNH PRESSURE IN HPA 1031.8 1031.2 1028.4 1026.1 1022.7 1022.2 1022.6 1022.5 1022.5 1028.0 1032.7 1031.3 1032.7 DAY 30 10 26 1 10 13 30 8 28 15 16 28 MIN. QNH PRESSURE IN HPA 1007.7 1009.4 1009.4 1013.9 1012.6 1013.5 1009.6 1012.6 1014.6 1020.3 1020.9 1015.3 1007.7 DAY 20 6 24 9 19 25 10 30 2 24 30 20 MEAN QFF PRESSURE IN HPA 1024.8 1025.7 1020.7 1015.5 1010.9 1006.7 1003.8 1005.8 1010.4 1019.8 1026.7 1025.9 1016.4 MAX. QFF PRESSURE IN HPA 1039.5 1038.4 1030.7 1022.8 1018.0 1015.5 1009.3 1012.5 1014.4 1025.5 1034.7 1036.4 1039.5 DAY 30 10 15 1 10 13 30 8 30 28 16 28 MIN. QFF PRESSURE IN HPA 1009.7 1010.7 1009.3 1006.2 1004.9 1002.6 996.9 1000.2 1004.3 1014.3 1020.5 1016.0 996.9 DAY 20 6 24 14 19 28 10 2 6 9 30 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 864.3 865.8 864.0 864.2 862.8 861.5 861.1 861.9 863.4 867.3 869.4 866.8 864.4 MAX. QFE PRESSURE IN HPA 874.4 874.0 871.2 869.6 866.3 866.3 867.0 866.6 866.8 870.9 875.4 873.4 875.4 DAY 30 10 26 1 10 12 30 8 22 15 16 28 MIN. QFE PRESSURE IN HPA 853.4 853.8 855.0 859.1 858.4 857.8 855.0 857.0 859.0 864.4 864.9 858.4 853.4 DAY 20 6 23 9 19 25 10 30 6 23 30 20 MEAN QNH PRESSURE IN HPA 1020.7 1022.4 1020.3 1020.5 1019.0 1017.4 1017.1 1017.9 1019.7 1024.1 1026.5 1023.5 1020.8 MAX. QNH PRESSURE IN HPA 1032.2 1031.8 1028.6 1026.7 1023.0 1023.0 1023.8 1023.3 1023.5 1028.2 1033.4 1031.1 1033.4 DAY 30 10 26 1 10 12 30 8 22 15 16 28 MIN. QNH PRESSURE IN HPA 1008.2 1008.7 1010.0 1014.7 1013.9 1013.2 1010.0 1012.3 1014.6 1020.8 1021.4 1013.9 1008.2 DAY 20 6 23 9 19 25 10 30 6 23 30 20 MEAN QFF PRESSURE IN HPA 1024.0 1025.2 1020.1 1015.2 1011.1 1007.3 1004.4 1005.9 1010.4 1019.3 1026.0 1025.0 1016.2 MAX. QFF PRESSURE IN HPA 1038.3 1037.9 1030.4 1023.3 1018.2 1015.8 1010.4 1012.5 1015.2 1025.8 1034.4 1036.2 1038.3 DAY 30 10 15 1 10 13 30 8 30 15 16 28 MIN. QFF PRESSURE IN HPA 1009.6 1009.5 1008.5 1006.0 1005.5 1003.1 997.7 1000.3 1003.6 1013.7 1019.8 1013.8 997.7 DAY 20 6 23 14 19 19 10 2 6 11 12 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.1 3.0 10.5 14.5 17.8 23.6 25.7 26.9 22.3 15.1 7.6 5.2 14.4 MINIMUN AIR TEMPERATURE (C) -3.3 -1.0 4.8 7.8 10.3 14.4 18.3 18.2 13.9 8.8 3.2 2.4 8.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 5 0 0 0 0 8 DAYS WITH MINIMUM TEMP. <=-4 10 5 0 0 0 0 0 0 0 0 1 3 19 DAYS WITH FREEZING MIN.<= 0 23 14 6 0 0 0 0 0 0 0 6 3 52 TEMPERATURE RECORDS LOWEST(C) -16.8 -11.8 -2.4 2.4 5.8 10.0 13.8 13.6 10.8 2.6 -11.4 -7.0 -16.8 DAY 28 1 12 13 11 2 19 22 15 27 20 22 MAXIMUM AIR TEMPERATURE (C) 4.9 7.8 16.7 20.9 24.7 31.3 32.4 35.0 30.3 22.0 13.1 8.7 20.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 19 28 31 20 0 0 0 100 DAYS WITH MAXIMUM TEMP. <= 0 6 0 0 0 0 0 0 0 0 0 0 0 6 TEMPERATURE RECORDS HIGHEST(C) 11.4 16.6 24.8 27.0 31.6 38.4 36.8 39.0 34.0 29.4 22.4 13.6 39.0 DAY 16 28 28 30 28 22 27 9 2 5 4 29 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 8.8 11.9 13.1 14.4 16.9 14.1 16.8 16.4 13.2 9.9 6.3 12.4 MEAN DAILY TEMP. (MDT) (C) 0.8 3.4 10.8 14.4 17.5 22.9 25.4 26.6 22.1 15.4 8.1 5.5 14.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 2.2 66.7 136.3 172.2 40.7 0.0 0.0 0.0 418.1 HEATING DEG. DAYS(BASE 18 0C) 533.7 409.2 224.4 113.5 35.4 0.0 0.0 0.0 0.3 87.4 295.8 387.0 2086.7 DEWPOINT (MEAN C) -4.8 -3.5 0.2 1.7 0.9 1.8 8.2 5.2 2.5 2.0 -1.8 -0.8 0.9 MIXING RATIO (G/KG) 3.22 3.48 4.59 5.13 4.97 5.35 8.11 6.69 5.47 5.21 4.11 4.34 5.06 VAPOUR PRESSURE (HPA) 4.46 4.81 6.33 7.06 6.82 7.34 11.07 9.17 7.53 7.20 5.69 6.00 6.96 SATURATION DEF. (HPA) 2.07 2.97 7.04 10.26 14.58 23.42 23.29 28.17 20.65 10.80 5.51 3.01 12.65 RELATIVE HUMIDITY (MEAN %) 72 65 53 46 37 27 36 28 30 45 55 68 47 RELATIVE HUMIDITY (MAX. %) 86 82 74 70 60 45 54 44 46 65 76 81 65 RELATIVE HUMIDITY (MIN. %) 54 48 33 26 20 14 21 15 17 27 37 56 31 RELATIVE HUMIDITY (MEAN% 03UTC) 81 74 69 66 56 43 52 43 45 61 66 74 61 RELATIVE HUMIDITY (MEAN% 09UTC) 61 53 38 33 25 20 27 23 22 34 45 60 37 RELATIVE HUMIDITY (MEAN% 15UTC) 67 61 44 34 26 16 24 18 20 38 51 67 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 38.5 28.4 45.6 23.5 14.1 3.0 5.0 0.8 0.7 11.2 44.7 77.2 292.7 DAYS WITH PRECIPITATION >=10 1 0 1 0 1 0 0 0 0 0 2 3 8 DAYS WITH PRECIPITATION >= 5 4 2 4 2 1 0 0 0 0 1 2 6 22 DAYS WITH PRECIPITATION >= 1 6 8 6 5 2 1 2 0 0 3 4 10 47 DAYS WITH PRECIPITATION 8 9 8 6 5 1 2 1 2 7 10 12 71 GREATEST DAILY PRECIPITATION 11.4 9.0 16.1 8.6 10.0 3.0 3.0 0.8 0.4 7.0 23.0 21.0 23.0 DAY 25 10 9 8 2 19 20 8 28 1 18 4 DAY WITH THUNDER STORM 0 0 0 3 2 0 1 1 0 0 2 0 9 DAYS WITH SNOW OR SLEET 7 7 0 0 0 0 0 0 0 0 3 1 18 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 1 0 0 1 WIND DIRECTION (PREVAILING) 180 180 180 180 180 360 360 225 180 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 10.6 12.0 11.2 11.3 11.6 7.3 7.4 11.4 9.3 11.4 10.7 11.0 10.9 PREVAILING WIND PERCENT 6.5 29.9 23.0 22.5 21.8 11.7 13.7 10.5 19.6 17.7 22.9 31.9 17.9 CALMS PERCENT OF WIND 85.9 54.9 61.7 62.1 54.8 62.5 70.6 67.7 59.6 54.8 57.9 51.6 62.1 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 192 189 194 196 201 228 8 221 205 199 199 192 198 VECTOR WIND MAGNITUDE(KNOTS) 0.4 4.3 3.5 3.8 3.4 0.9 1.5 1.5 1.8 3.2 2.9 5.0 2.4 WIND STEADINESES (MEAN %) 30.8 86.0 87.5 90.5 66.7 26.5 65.2 48.4 51.4 69.6 70.7 92.6 63.2 WIND SPEED (MEAN KNOTS) 1.3 5.0 4.0 4.2 5.1 3.4 2.3 3.1 3.5 4.6 4.1 5.4 3.8 FASTEST WIND DIRECTION 200 190 190 210 180 200 240 210 220 180 160 200 180 FASTEST WIND SPEED (KNOTS) 17 23 23 29 23 19 16 19 19 33 29 23 33 DAY 14 23 3 19 4 6 8 19 28 16 21 19 DAYS WITH SKY CLEAR (0-2)/8 11 9 15 12 17 30 26 30 27 19 11 6 213 DAYS WITH P.CLOUDY (3-6)/8 9 15 9 12 12 0 5 1 3 11 13 11 101 DAYS WITH CLOUDY (7-8)/8 11 4 7 6 2 0 0 0 0 1 6 14 51 DAYS WITH VISIBILITY =< 2 KM 3 1 0 0 0 0 0 0 0 0 2 9 15 DURATION OF SUNSHINE HOURS 120.8 164.1 232.1 254.1 320.0 385.4 360.0 351.2 299.9 261.4 162.2 118.5 3029.7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 868.1 864.7 864.1 863.7 861.8 860.8 860.5 862.1 864.3 866.8 866.9 867.0 864.2 MAX. QFE PRESSURE IN HPA 873.9 874.0 873.1 872.2 867.0 868.0 865.5 867.4 869.5 874.1 874.6 874.4 874.6 DAY-HOUR 30- 6 12- 6 1- 6 1-21 19- 6 2- 3 29- 6 11- 6 24- 6 9- 6 2- 6 9-18 MIN. QFE PRESSURE IN HPA 863.0 848.1 851.3 858.2 854.9 851.6 855.0 855.2 859.1 860.1 851.4 857.0 848.1 DAY-HOUR 19-12 21- 0 25- 3 12- 9 29-15 17-15 10-15 29-15 5-12 25-15 18- 3 20- 3 MEAN QNH PRESSURE IN HPA 1025.0 1021.1 1020.5 1020.0 1017.8 1016.7 1016.3 1018.2 1020.7 1023.5 1023.7 1023.8 1020.6 MAX. QNH PRESSURE IN HPA 1031.7 1031.8 1030.8 1029.7 1023.8 1024.9 1022.1 1024.2 1026.6 1031.9 1032.5 1032.2 1032.5 DAY-HOUR 30- 6 12- 6 1- 6 1-21 19- 6 2- 3 29- 6 11- 6 24- 6 9- 6 2- 6 9-18 MIN. QNH PRESSURE IN HPA 1019.2 1002.1 1005.8 1013.7 1009.9 1006.1 1010.0 1010.3 1014.7 1015.9 1005.9 1012.3 1002.1 DAY-HOUR 19-12 21- 0 25- 3 12- 9 29-15 17-15 10-15 29-15 5-12 25-15 18- 3 20- 3 MEAN QFF PRESSURE IN HPA 1028.9 1023.1 1017.8 1014.9 1010.8 1006.5 1004.8 1006.2 1011.3 1018.2 1022.8 1024.3 1015.8 MAX. QFF PRESSURE IN HPA 1042.9 1035.4 1031.1 1024.6 1018.1 1018.2 1010.7 1013.9 1018.3 1029.0 1037.8 1036.6 1042.9 DAY-HOUR 30- 6 12- 6 11- 6 2- 6 18- 3 2- 3 21- 3 12- 3 24- 6 27- 6 20- 3 22- 6 MIN. QFF PRESSURE IN HPA 1021.0 1001.9 1001.8 1008.2 1001.2 996.4 999.0 999.0 1003.6 1009.2 1003.9 1010.8 996.4 DAY-HOUR 18- 0 21- 0 24-12 25-18 29- 6 17-15 11-15 29-12 5-12 25-21 17-21 20- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 868.1 864.5 864.1 863.9 861.9 861.0 860.7 862.3 864.4 866.7 866.9 867.1 864.3 MAX. QFE PRESSURE IN HPA 872.9 872.2 871.2 871.5 866.0 866.6 863.7 866.4 868.3 872.5 873.5 873.9 873.9 DAY 31 11 1 2 17 2 16 11 24 10 2 10 MIN. QFE PRESSURE IN HPA 864.1 848.1 851.9 858.7 855.0 854.0 857.1 857.8 860.6 861.2 851.8 858.1 848.1 DAY 24 21 25 12 9 17 11 30 5 26 18 5 MEAN QNH PRESSURE IN HPA 1025.0 1020.9 1020.4 1020.2 1017.9 1016.9 1016.6 1018.4 1020.8 1023.5 1023.6 1023.9 1020.7 MAX. QNH PRESSURE IN HPA 1030.5 1029.7 1028.6 1028.9 1022.6 1023.3 1020.0 1023.1 1025.3 1030.1 1031.2 1031.7 1031.7 DAY 31 11 1 2 17 2 16 11 24 10 2 10 MIN. QNH PRESSURE IN HPA 1020.5 1002.1 1006.5 1014.3 1010.0 1008.9 1012.4 1013.2 1016.5 1017.1 1006.4 1013.6 1002.1 DAY 24 21 25 12 9 17 11 30 5 26 18 5 MEAN QFF PRESSURE IN HPA 1028.2 1022.6 1017.4 1014.9 1010.9 1006.9 1005.0 1006.0 1011.2 1017.7 1022.3 1024.2 1015.6 MAX. QFF PRESSURE IN HPA 1040.6 1032.8 1029.1 1022.7 1016.3 1016.5 1009.6 1011.7 1016.4 1026.4 1036.4 1033.4 1040.6 DAY 28 11 11 2 19 2 22 12 24 27 20 22 MIN. QFF PRESSURE IN HPA 1021.0 1001.9 1002.9 1008.2 1004.0 997.3 1000.4 999.8 1005.0 1010.5 1004.1 1013.2 997.3 DAY 18 21 25 12 9 17 11 30 5 26 18 20 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 868.0 864.5 864.3 864.2 862.3 861.8 861.6 863.1 865.0 866.9 866.9 866.8 864.6 MAX. QFE PRESSURE IN HPA 872.7 872.5 872.3 871.4 866.5 868.0 864.6 867.0 868.4 872.9 873.9 873.1 873.9 DAY 30 12 1 1 18 2 28 5 19 9 2 10 MIN. QFE PRESSURE IN HPA 863.4 848.3 851.3 858.3 855.8 854.3 857.6 858.3 861.0 863.0 851.4 857.0 848.3 DAY 19 21 25 12 3 17 11 30 5 26 18 20 MEAN QNH PRESSURE IN HPA 1024.9 1020.9 1020.6 1020.6 1018.4 1017.8 1017.6 1019.3 1021.4 1023.7 1023.7 1023.6 1021.0 MAX. QNH PRESSURE IN HPA 1030.3 1030.1 1029.8 1028.8 1023.2 1024.9 1021.0 1023.8 1025.4 1030.5 1031.7 1030.8 1031.7 DAY 30 12 1 1 18 2 28 5 19 9 2 10 MIN. QNH PRESSURE IN HPA 1019.7 1002.4 1005.8 1013.8 1011.0 1009.2 1013.0 1013.8 1016.9 1019.2 1005.9 1012.3 1002.4 DAY 19 21 25 12 3 17 11 30 5 26 18 20 MEAN QFF PRESSURE IN HPA 1029.1 1023.4 1018.6 1016.2 1012.1 1008.0 1006.6 1007.9 1012.9 1019.1 1023.3 1024.5 1016.8 MAX. QFF PRESSURE IN HPA 1041.4 1033.5 1030.7 1024.2 1018.1 1018.2 1010.7 1013.9 1017.5 1026.9 1037.8 1035.3 1041.4 DAY 28 12 11 2 18 2 21 12 24 28 20 22 MIN. QFF PRESSURE IN HPA 1021.1 1004.2 1003.8 1010.0 1005.0 998.5 1001.0 1001.0 1007.0 1012.1 1005.2 1010.8 998.5 DAY 19 21 24 12 8 17 11 30 5 6 18 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 869.0 865.5 865.0 864.7 862.6 861.9 861.8 863.5 865.4 867.8 867.9 867.7 865.2 MAX. QFE PRESSURE IN HPA 873.9 874.0 873.1 872.1 867.0 867.9 865.5 867.4 869.5 874.1 874.6 874.2 874.6 DAY 30 12 1 2 19 2 29 11 24 9 2 9 MIN. QFE PRESSURE IN HPA 864.0 849.8 852.0 858.8 856.9 854.3 858.0 858.9 861.1 863.4 854.0 859.2 849.8 DAY 19 21 25 12 29 17 9 30 5 6 18 5 MEAN QNH PRESSURE IN HPA 1026.0 1022.0 1021.5 1021.1 1018.7 1017.9 1017.8 1019.7 1022.0 1024.7 1024.8 1024.6 1021.7 MAX. QNH PRESSURE IN HPA 1031.7 1031.8 1030.8 1029.6 1023.8 1024.8 1022.1 1024.2 1026.6 1031.9 1032.5 1032.0 1032.5 DAY 30 12 1 2 19 2 29 11 24 9 2 9 MIN. QNH PRESSURE IN HPA 1020.3 1004.1 1006.6 1014.4 1012.2 1009.2 1013.5 1014.5 1017.0 1019.7 1008.9 1014.9 1004.1 DAY 19 21 25 12 29 17 9 30 5 6 18 5 MEAN QFF PRESSURE IN HPA 1030.4 1024.5 1019.1 1016.0 1011.7 1007.6 1006.2 1007.7 1012.6 1019.3 1024.2 1025.5 1017.1 MAX. QFF PRESSURE IN HPA 1042.9 1035.4 1031.1 1024.6 1018.0 1016.2 1009.8 1013.5 1018.3 1029.0 1037.8 1036.6 1042.9 DAY 30 12 11 2 19 2 22 12 24 27 20 22 MIN. QFF PRESSURE IN HPA 1022.4 1006.8 1003.9 1010.5 1001.2 997.6 1001.4 1002.3 1005.9 1010.8 1009.9 1014.8 997.6 DAY 19 21 24 12 29 17 9 30 5 6 18 20 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 868.7 865.2 864.5 864.0 861.9 861.1 861.0 862.5 864.5 867.0 867.1 867.1 864.6 MAX. QFE PRESSURE IN HPA 873.6 872.6 872.4 872.0 866.7 866.7 864.5 867.0 868.1 873.2 872.7 874.3 874.3 DAY 30 11 1 1 18 2 29 5 24 9 14 9 MIN. QFE PRESSURE IN HPA 863.4 850.4 852.0 858.2 856.8 853.8 857.1 857.4 860.5 861.7 854.2 859.4 850.4 DAY 19 21 25 12 9 17 9 29 5 25 18 5 MEAN QNH PRESSURE IN HPA 1025.7 1021.8 1021.0 1020.3 1018.0 1017.1 1016.9 1018.7 1020.9 1023.8 1023.9 1023.8 1021.0 MAX. QNH PRESSURE IN HPA 1031.3 1030.2 1030.0 1029.5 1023.4 1023.4 1020.9 1023.8 1025.0 1030.9 1030.3 1032.1 1032.1 DAY 30 11 1 1 18 2 29 5 24 9 14 9 MIN. QNH PRESSURE IN HPA 1019.7 1004.8 1006.6 1013.7 1012.1 1008.7 1012.4 1012.8 1016.3 1017.7 1009.1 1015.1 1004.8 DAY 19 21 25 12 9 17 9 29 5 25 18 5 MEAN QFF PRESSURE IN HPA 1029.2 1023.3 1017.9 1014.8 1010.6 1006.7 1005.3 1006.3 1011.0 1017.9 1022.6 1024.1 1015.8 MAX. QFF PRESSURE IN HPA 1041.2 1033.0 1030.5 1022.4 1017.5 1015.5 1010.2 1011.3 1016.3 1026.5 1035.9 1034.3 1041.2 DAY 30 10 11 1 18 1 22 11 21 27 20 9 MIN. QFF PRESSURE IN HPA 1021.5 1006.3 1004.4 1008.8 1003.6 997.5 1000.9 1000.9 1005.3 1009.9 1008.0 1015.0 997.5 DAY 19 21 25 12 29 17 9 29 5 6 17 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 867.4 864.1 863.2 862.9 860.9 859.7 859.6 861.0 863.2 865.9 866.2 866.3 863.4 MAX. QFE PRESSURE IN HPA 872.4 871.6 870.6 871.0 865.2 866.1 863.0 865.0 866.5 871.6 872.0 874.0 874.0 DAY 30 10 1 1 18 1 15 11 24 9 14 9 MIN. QFE PRESSURE IN HPA 863.0 851.1 851.9 858.6 855.0 852.2 856.0 855.5 859.1 860.6 854.7 859.5 851.1 DAY 19 21 25 12 3 17 10 29 5 25 17 4 MEAN QNH PRESSURE IN HPA 1024.2 1020.5 1019.4 1019.1 1016.8 1015.5 1015.3 1016.9 1019.4 1022.5 1022.8 1023.0 1019.6 MAX. QNH PRESSURE IN HPA 1030.0 1029.0 1027.9 1028.4 1021.7 1022.7 1019.2 1021.5 1023.2 1029.0 1029.5 1031.8 1031.8 DAY 30 10 1 1 18 1 15 11 24 9 14 9 MIN. QNH PRESSURE IN HPA 1019.2 1005.6 1006.5 1014.2 1010.0 1006.8 1011.2 1010.6 1014.7 1016.5 1009.7 1015.2 1005.6 DAY 19 21 25 12 3 17 10 29 5 25 17 4 MEAN QFF PRESSURE IN HPA 1027.4 1022.0 1016.4 1013.8 1009.8 1005.5 1003.7 1004.7 1009.8 1016.8 1021.5 1023.2 1014.5 MAX. QFF PRESSURE IN HPA 1038.2 1031.9 1028.1 1021.0 1016.1 1015.5 1007.7 1009.9 1013.9 1024.9 1033.1 1033.6 1038.2 DAY 30 10 11 1 18 1 22 11 24 27 20 9 MIN. QFF PRESSURE IN HPA 1021.2 1008.3 1001.8 1009.8 1003.6 996.4 1000.0 999.0 1003.6 1009.9 1006.8 1015.1 996.4 DAY 19 21 24 12 29 17 8 29 5 18 17 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.6 864.4 863.5 862.8 860.8 859.4 859.0 860.7 863.1 866.1 866.5 866.8 863.4 MAX. QFE PRESSURE IN HPA 872.9 872.0 870.4 871.0 865.2 865.1 862.0 864.2 866.3 871.1 871.8 874.1 874.1 DAY 30 10 4 1 13 1 28 11 23 9 14 9 MIN. QFE PRESSURE IN HPA 863.0 853.0 853.4 859.6 854.9 851.6 855.0 855.2 859.1 860.1 854.4 858.5 851.6 DAY 19 20 25 12 29 17 10 29 5 25 17 19 MEAN QNH PRESSURE IN HPA 1024.4 1020.7 1019.7 1018.9 1016.7 1015.1 1014.6 1016.6 1019.3 1022.8 1023.2 1023.5 1019.6 MAX. QNH PRESSURE IN HPA 1030.5 1029.5 1027.7 1028.4 1021.7 1021.6 1018.1 1020.6 1023.0 1028.5 1029.3 1031.9 1031.9 DAY 30 10 4 1 13 1 28 11 23 9 14 9 MIN. QNH PRESSURE IN HPA 1019.2 1007.7 1008.2 1015.3 1009.9 1006.1 1010.0 1010.3 1014.7 1015.9 1009.4 1014.0 1006.1 DAY 19 20 25 12 29 17 10 29 5 25 17 19 MEAN QFF PRESSURE IN HPA 1028.6 1023.1 1017.6 1014.6 1010.3 1005.3 1003.5 1005.3 1010.8 1018.2 1022.8 1024.4 1015.4 MAX. QFF PRESSURE IN HPA 1040.0 1032.5 1028.1 1021.8 1015.6 1014.3 1007.9 1009.8 1015.4 1027.2 1034.5 1034.2 1040.0 DAY 30 10 11 1 18 1 20 11 19 27 19 22 MIN. QFF PRESSURE IN HPA 1021.2 1008.3 1005.1 1010.2 1003.1 996.4 999.0 999.6 1005.3 1009.9 1007.3 1012.8 996.4 DAY 19 20 24 25 7 17 11 29 5 25 17 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 868.1 864.8 864.3 863.6 861.8 860.5 859.8 861.9 864.3 866.8 867.1 867.2 864.2 MAX. QFE PRESSURE IN HPA 873.3 872.2 871.0 871.9 866.0 866.0 863.0 865.3 869.0 871.9 872.5 874.4 874.4 DAY 30 10 1 1 13 1 29 11 23 9 14 9 MIN. QFE PRESSURE IN HPA 864.6 852.2 854.4 859.4 855.9 853.4 856.6 857.7 860.3 860.9 853.7 858.0 852.2 DAY 19 20 24 25 29 17 11 29 5 25 17 4 MEAN QNH PRESSURE IN HPA 1025.1 1021.2 1020.7 1019.9 1017.8 1016.3 1015.6 1017.9 1020.7 1023.6 1023.9 1024.0 1020.5 MAX. QNH PRESSURE IN HPA 1031.0 1029.7 1028.4 1029.4 1022.6 1022.6 1019.2 1021.8 1026.1 1029.4 1030.1 1032.2 1032.2 DAY 30 10 1 1 13 1 29 11 23 9 14 9 MIN. QNH PRESSURE IN HPA 1021.0 1006.8 1009.4 1015.1 1011.1 1008.2 1011.9 1013.1 1016.1 1016.8 1008.6 1013.5 1006.8 DAY 19 20 24 25 29 17 11 29 5 25 17 4 MEAN QFF PRESSURE IN HPA 1029.5 1023.5 1018.1 1014.8 1010.8 1006.0 1004.0 1006.0 1011.3 1018.4 1023.2 1024.8 1015.9 MAX. QFF PRESSURE IN HPA 1041.3 1033.2 1028.7 1023.5 1015.6 1014.7 1008.1 1011.0 1017.6 1026.8 1036.0 1034.6 1041.3 DAY 30 10 11 1 5 1 21 11 23 27 19 21 MIN. QFF PRESSURE IN HPA 1023.0 1007.0 1004.4 1008.2 1001.9 996.8 999.8 1001.0 1005.1 1010.3 1005.8 1012.3 996.8 DAY 19 20 23 25 29 17 11 29 5 25 17 19 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 868.2 864.8 864.3 863.9 862.1 860.9 860.4 862.2 864.5 867.0 866.9 867.2 864.4 MAX. QFE PRESSURE IN HPA 873.0 872.4 870.4 872.2 866.0 866.8 863.5 866.0 868.7 872.5 872.8 874.1 874.1 DAY 30 10 3 1 13 1 21 10 23 9 1 9 MIN. QFE PRESSURE IN HPA 863.7 849.6 853.3 859.7 856.0 853.4 857.0 857.7 860.7 860.9 852.1 857.8 849.6 DAY 23 20 24 11 8 17 11 29 5 25 17 4 MEAN QNH PRESSURE IN HPA 1025.1 1021.2 1020.6 1020.2 1018.2 1016.8 1016.2 1018.3 1020.9 1023.8 1023.7 1024.0 1020.7 MAX. QNH PRESSURE IN HPA 1030.6 1030.0 1027.7 1029.7 1022.6 1023.5 1019.8 1022.6 1025.7 1030.1 1030.4 1031.9 1031.9 DAY 30 10 3 1 13 1 21 10 23 9 1 9 MIN. QNH PRESSURE IN HPA 1020.0 1003.9 1008.1 1015.4 1011.2 1008.2 1012.3 1013.1 1016.6 1016.8 1006.7 1013.2 1003.9 DAY 23 20 24 11 8 17 11 29 5 25 17 4 MEAN QFF PRESSURE IN HPA 1028.7 1022.6 1017.4 1014.6 1010.7 1006.4 1004.5 1006.1 1011.1 1018.0 1022.4 1024.2 1015.6 MAX. QFF PRESSURE IN HPA 1040.0 1033.1 1029.2 1023.5 1015.9 1016.3 1009.7 1010.9 1016.4 1026.8 1036.1 1033.6 1040.0 DAY 27 10 10 1 22 1 21 11 23 27 19 9 MIN. QFF PRESSURE IN HPA 1022.2 1002.7 1004.1 1009.7 1004.3 996.7 1000.6 999.4 1005.2 1009.2 1003.9 1012.1 996.7 DAY 17 20 23 11 7 17 11 29 4 25 17 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.2 3.2 8.2 11.5 16.3 22.5 25.9 25.4 22.8 17.1 7.9 -0.9 13.2 MINIMUN AIR TEMPERATURE (C) -4.4 -1.4 2.8 7.3 9.2 14.1 17.8 16.9 13.4 10.5 3.2 -3.5 7.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 0 0 1 0 0 3 DAYS WITH MINIMUM TEMP. <=-4 20 10 1 0 0 0 0 0 0 0 0 12 43 DAYS WITH FREEZING MIN.<= 0 24 17 8 0 0 0 0 0 0 0 9 23 81 TEMPERATURE RECORDS LOWEST(C) -16.0 -8.0 -4.0 3.2 4.8 9.0 15.6 12.8 11.0 4.0 -1.8 -14.2 -16.0 DAY 25 5 1 22 2 4 2 31 26 23 23 14 MAXIMUM AIR TEMPERATURE (C) 3.4 8.9 14.6 16.5 23.0 29.3 32.9 33.3 32.0 24.6 13.9 2.3 19.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 12 28 29 26 3 0 0 100 DAYS WITH MAXIMUM TEMP. <= 0 6 0 0 0 0 0 0 0 0 0 0 13 19 TEMPERATURE RECORDS HIGHEST(C) 11.6 15.4 20.6 21.0 30.2 35.2 36.8 37.0 36.0 31.8 21.6 10.4 37.0 DAY 1 22 13 17 30 27 11 14 3 1 9 9 DIF. BETWEEN (MAX.-MIN.) (C) 7.8 10.3 11.8 9.2 13.8 15.2 15.1 16.4 18.6 14.1 10.7 5.8 12.4 MEAN DAILY TEMP. (MDT) (C) -0.5 3.7 8.7 11.9 16.1 21.7 25.4 25.1 22.7 17.6 8.5 -0.6 13.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.3 43.3 135.2 127.5 52.2 12.0 0.0 0.0 371.5 HEATING DEG. DAYS(BASE 18 0C) 574.8 399.7 288.9 182.7 77.5 0.1 0.0 0.0 0.0 44.9 283.5 575.7 2427.7 DEWPOINT (MEAN C) -6.2 -5.1 -2.4 2.8 4.9 3.4 6.9 5.3 1.1 3.4 -0.1 -4.3 0.8 MIXING RATIO (G/KG) 2.96 3.18 3.87 5.52 6.42 5.85 7.54 6.82 4.92 5.75 4.49 3.37 5.06 VAPOUR PRESSURE (HPA) 4.10 4.40 5.34 7.58 8.81 8.03 10.32 9.33 6.79 7.94 6.22 4.66 6.96 SATURATION DEF. (HPA) 1.89 3.65 6.11 6.32 10.78 20.44 24.27 24.55 22.51 12.72 5.02 1.36 11.63 RELATIVE HUMIDITY (MEAN %) 70 57 52 57 52 32 33 31 27 44 61 78 50 RELATIVE HUMIDITY (MAX. %) 84 75 73 75 75 50 50 48 43 63 80 90 67 RELATIVE HUMIDITY (MIN. %) 53 38 32 41 32 18 19 17 13 25 41 65 33 RELATIVE HUMIDITY (MEAN% 03UTC) 78 69 66 66 70 47 48 46 42 59 75 82 62 RELATIVE HUMIDITY (MEAN% 09UTC) 63 46 37 47 41 23 25 25 19 30 47 73 40 RELATIVE HUMIDITY (MEAN% 15UTC) 66 50 42 51 38 20 21 20 18 38 54 78 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 83.2 33.6 63.9 61.2 47.4 0.0 8.0 0.0 0.0 12.7 37.9 118.0 465.9 DAYS WITH PRECIPITATION >=10 4 1 2 3 3 0 0 0 0 0 2 4 19 DAYS WITH PRECIPITATION >= 5 6 3 3 3 4 0 1 0 0 1 2 6 29 DAYS WITH PRECIPITATION >= 1 8 4 10 8 5 0 1 0 0 3 6 9 54 DAYS WITH PRECIPITATION 12 6 11 12 8 0 1 0 0 8 8 16 82 GREATEST DAILY PRECIPITATION 23.8 13.0 27.0 19.7 13.0 0.0 8.0 0.0 0.0 7.6 18.0 35.1 35.1 DAY 23 12 18 18 4 ** 22 ** ** 19 25 10 DAY WITH THUNDER STORM 0 0 1 3 5 0 1 0 0 1 0 1 12 DAYS WITH SNOW OR SLEET 10 0 1 0 0 0 0 0 0 0 1 12 24 DAYS WITH DUST 0 0 1 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 180 180 180 180 180 180 360 180 180 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 12.0 11.6 11.8 11.3 9.3 11.0 6.3 8.5 10.1 10.4 11.1 10.7 10.9 PREVAILING WIND PERCENT 26.2 24.6 32.7 42.9 14.9 12.9 12.1 15.7 15.8 11.3 9.6 15.3 18.8 CALMS PERCENT OF WIND 61.7 58.9 43.5 29.2 55.2 52.5 58.1 52.0 66.7 64.5 75.4 73.4 57.6 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 189 193 194 193 201 212 335 207 203 213 199 191 198 VECTOR WIND MAGNITUDE(KNOTS) 3.2 2.9 5.1 6.3 1.6 1.7 0.5 1.3 2.1 1.9 1.0 1.9 2.4 WIND STEADINESES (MEAN %) 74.4 65.9 82.3 84.0 44.4 35.4 15.2 32.5 67.7 59.4 45.5 76.0 58.5 WIND SPEED (MEAN KNOTS) 4.3 4.4 6.2 7.5 3.6 4.8 3.3 4.0 3.1 3.2 2.2 2.5 4.1 FASTEST WIND DIRECTION 180 270 180 210 190 210 210 210 190 180 180 180 180 FASTEST WIND SPEED (KNOTS) 23 27 29 25 25 23 21 21 17 25 23 21 29 DAY 7 16 26 9 24 19 25 15 12 3 12 9 DAYS WITH SKY CLEAR (0-2)/8 12 15 15 4 13 27 28 31 30 13 14 5 207 DAYS WITH P.CLOUDY (3-6)/8 11 10 7 15 16 3 3 0 0 15 10 10 100 DAYS WITH CLOUDY (7-8)/8 8 3 9 11 2 0 0 0 0 3 6 16 58 DAYS WITH VISIBILITY =< 2 KM 6 0 0 0 1 0 0 0 0 0 1 8 16 DURATION OF SUNSHINE HOURS 141.3 190.4 228.1 192.8 313.0 375.7 374.4 364.1 320.3 217.8 167.2 76.1 2961.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.6 867.1 864.1 861.4 862.6 861.5 861.7 860.8 865.2 867.4 869.2 865.6 864.4 MAX. QFE PRESSURE IN HPA 878.5 877.9 875.8 869.1 869.1 868.1 867.2 866.4 870.1 873.2 878.2 875.6 878.5 DAY-HOUR 27- 6 6- 6 10- 6 1- 6 17- 6 25- 3 29- 3 31- 6 29- 6 11- 6 18- 6 3- 6 MIN. QFE PRESSURE IN HPA 854.6 856.0 853.9 852.7 857.8 853.8 853.8 855.0 859.8 861.5 860.6 849.3 849.3 DAY-HOUR 7-12 12- 3 22- 3 3-12 24- 9 19-15 24-12 14-15 10-12 21- 9 12- 0 21- 6 MEAN QNH PRESSURE IN HPA 1023.3 1023.9 1020.4 1017.3 1018.8 1017.5 1017.8 1016.6 1021.7 1024.2 1026.3 1022.1 1020.8 MAX. QNH PRESSURE IN HPA 1036.9 1036.2 1033.8 1026.2 1026.2 1025.0 1024.0 1023.1 1027.3 1030.9 1036.6 1033.6 1036.9 DAY-HOUR 27- 6 6- 6 10- 6 1- 6 17- 6 25- 3 29- 3 31- 6 29- 6 11- 6 18- 6 3- 6 MIN. QNH PRESSURE IN HPA 1009.6 1011.2 1008.8 1007.4 1013.2 1008.7 1008.7 1010.0 1015.5 1017.5 1016.5 1003.5 1003.5 DAY-HOUR 7-12 12- 3 22- 3 3-12 24- 9 19-15 24-12 14-15 10-12 21- 9 12- 0 21- 6 MEAN QFF PRESSURE IN HPA 1027.9 1025.8 1019.1 1013.9 1012.6 1007.9 1006.3 1005.4 1012.2 1017.7 1025.2 1026.5 1016.7 MAX. QFF PRESSURE IN HPA 1047.1 1041.9 1035.1 1025.1 1020.6 1016.0 1013.2 1014.3 1019.1 1025.2 1037.9 1041.5 1047.1 DAY-HOUR 27- 6 6- 6 10- 9 1- 3 17- 3 25- 3 29- 3 31- 3 29- 3 23- 6 18- 6 14-15 MIN. QFF PRESSURE IN HPA 1008.3 1010.0 1003.4 1005.8 1003.8 998.6 996.3 998.2 1006.1 1010.2 1010.2 1005.3 996.3 DAY-HOUR 7-12 25- 0 26-21 3-12 28-21 19-15 24-12 14-15 10-12 21- 9 12- 0 21- 6 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 866.7 867.0 864.1 861.2 862.8 861.6 862.0 860.9 865.3 867.3 869.2 865.5 864.5 MAX. QFE PRESSURE IN HPA 877.1 876.8 874.2 867.3 868.0 867.2 866.1 865.1 868.7 872.4 876.9 874.6 877.1 DAY 27 6 11 1 17 25 30 31 21 11 18 3 MIN. QFE PRESSURE IN HPA 857.1 856.8 855.6 853.8 859.0 855.4 855.6 856.4 861.7 862.6 860.6 850.1 850.1 DAY 8 25 22 4 20 19 24 15 11 30 12 21 MEAN QNH PRESSURE IN HPA 1023.4 1023.7 1020.5 1017.1 1018.9 1017.6 1018.0 1016.8 1021.8 1024.2 1026.3 1022.1 1020.9 MAX. QNH PRESSURE IN HPA 1035.3 1035.0 1032.0 1024.1 1024.9 1024.0 1022.7 1021.6 1025.7 1030.0 1035.1 1032.5 1035.3 DAY 27 6 11 1 17 25 30 31 21 11 18 3 MIN. QNH PRESSURE IN HPA 1012.4 1012.1 1010.7 1008.7 1014.6 1010.5 1010.7 1011.6 1017.7 1018.7 1016.5 1004.4 1004.4 DAY 8 25 22 4 20 19 24 15 11 30 12 21 MEAN QFF PRESSURE IN HPA 1027.5 1025.1 1018.9 1013.5 1012.7 1008.1 1006.5 1005.4 1011.8 1017.2 1024.6 1026.2 1016.5 MAX. QFF PRESSURE IN HPA 1043.8 1038.6 1033.5 1023.1 1019.7 1015.5 1011.7 1012.0 1015.6 1023.8 1035.6 1040.6 1043.8 DAY 27 6 11 1 17 8 30 31 29 23 18 14 MIN. QFF PRESSURE IN HPA 1013.4 1010.0 1007.2 1007.2 1004.4 999.4 997.8 999.3 1006.9 1011.5 1010.2 1006.0 997.8 DAY 8 25 27 4 29 19 24 16 11 3 12 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.4 867.0 864.3 861.3 863.1 862.0 862.6 861.7 865.9 867.5 869.4 865.3 864.7 MAX. QFE PRESSURE IN HPA 877.1 877.1 874.5 868.5 868.8 868.1 867.2 866.2 869.3 872.7 877.0 874.7 877.1 DAY 27 6 11 1 17 25 29 31 21 11 18 3 MIN. QFE PRESSURE IN HPA 856.9 856.0 853.9 853.3 860.0 855.4 855.1 856.2 862.5 862.8 860.7 849.6 849.6 DAY 8 12 22 3 20 19 24 15 19 30 12 21 MEAN QNH PRESSURE IN HPA 1023.1 1023.8 1020.7 1017.2 1019.3 1018.1 1018.8 1017.7 1022.5 1024.4 1026.5 1021.8 1021.2 MAX. QNH PRESSURE IN HPA 1035.3 1035.3 1032.4 1025.5 1025.8 1025.0 1024.0 1022.9 1026.4 1030.3 1035.2 1032.6 1035.3 DAY 27 6 11 1 17 25 29 31 21 11 18 3 MIN. QNH PRESSURE IN HPA 1012.2 1011.2 1008.8 1008.1 1015.8 1010.5 1010.2 1011.4 1018.6 1019.0 1016.6 1003.9 1003.9 DAY 8 12 22 3 20 19 24 15 19 30 12 21 MEAN QFF PRESSURE IN HPA 1028.0 1026.3 1019.9 1014.3 1013.7 1008.9 1007.7 1007.1 1013.9 1018.8 1026.0 1026.3 1017.6 MAX. QFF PRESSURE IN HPA 1045.5 1040.6 1033.9 1025.1 1020.6 1016.0 1013.2 1014.3 1019.1 1024.7 1037.6 1041.1 1045.5 DAY 27 6 11 1 17 25 29 31 29 23 18 14 MIN. QFF PRESSURE IN HPA 1013.4 1010.4 1008.4 1006.9 1006.1 1000.0 998.6 999.3 1008.5 1012.1 1011.3 1005.6 998.6 DAY 7 12 22 25 29 19 24 15 19 3 12 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.4 868.0 865.0 861.8 863.4 862.4 862.8 861.9 866.4 868.3 870.3 866.1 865.3 MAX. QFE PRESSURE IN HPA 878.5 877.9 875.8 869.1 869.1 868.0 867.2 866.4 870.1 873.2 878.2 875.6 878.5 DAY 27 6 10 1 17 25 29 31 29 11 18 3 MIN. QFE PRESSURE IN HPA 857.5 857.8 854.6 853.3 859.7 855.4 854.8 856.2 862.6 862.9 862.6 849.3 849.3 DAY 8 12 22 3 24 19 24 15 10 21 13 21 MEAN QNH PRESSURE IN HPA 1024.2 1025.0 1021.4 1017.8 1019.7 1018.5 1019.0 1017.9 1023.1 1025.3 1027.6 1022.8 1021.9 MAX. QNH PRESSURE IN HPA 1036.9 1036.2 1033.8 1026.2 1026.2 1024.9 1024.0 1023.1 1027.3 1030.9 1036.6 1033.6 1036.9 DAY 27 6 10 1 17 25 29 31 29 11 18 3 MIN. QNH PRESSURE IN HPA 1012.9 1013.2 1009.6 1008.1 1015.4 1010.5 1009.8 1011.4 1018.7 1019.1 1018.7 1003.5 1003.5 DAY 8 12 22 3 24 19 24 15 10 21 13 21 MEAN QFF PRESSURE IN HPA 1029.3 1027.2 1020.6 1014.5 1013.5 1008.7 1007.4 1006.6 1013.6 1018.9 1026.9 1027.3 1017.9 MAX. QFF PRESSURE IN HPA 1047.1 1041.9 1034.8 1024.9 1020.3 1015.4 1013.0 1014.1 1018.9 1025.2 1037.9 1041.3 1047.1 DAY 27 6 11 1 17 8 29 31 29 23 18 14 MIN. QFF PRESSURE IN HPA 1015.4 1013.2 1008.7 1006.9 1006.0 999.2 997.5 998.9 1008.5 1012.3 1014.7 1005.3 997.5 DAY 7 12 27 3 29 19 24 15 19 3 12 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 866.9 867.8 864.3 861.5 862.8 861.8 862.0 861.0 865.4 867.5 869.5 865.7 864.7 MAX. QFE PRESSURE IN HPA 877.6 876.8 875.8 867.5 868.6 867.5 866.6 865.3 869.2 871.6 877.5 874.8 877.6 DAY 27 6 10 1 17 24 29 31 29 11 18 3 MIN. QFE PRESSURE IN HPA 857.1 858.5 854.8 853.6 857.8 855.2 854.0 855.8 861.6 861.5 862.2 850.0 850.0 DAY 7 26 22 3 24 19 24 15 10 21 12 21 MEAN QNH PRESSURE IN HPA 1023.6 1024.6 1020.7 1017.5 1019.0 1017.8 1018.1 1016.9 1021.9 1024.3 1026.7 1022.3 1021.1 MAX. QNH PRESSURE IN HPA 1035.9 1035.0 1033.8 1024.3 1025.6 1024.3 1023.3 1021.8 1026.3 1029.0 1035.8 1032.7 1035.9 DAY 27 6 10 1 17 24 29 31 29 11 18 3 MIN. QNH PRESSURE IN HPA 1012.4 1014.0 1009.8 1008.4 1013.2 1010.3 1008.9 1011.0 1017.6 1017.5 1018.3 1004.3 1004.3 DAY 7 26 22 3 24 19 24 15 10 21 12 21 MEAN QFF PRESSURE IN HPA 1027.9 1026.0 1019.0 1013.7 1012.6 1008.1 1006.4 1005.3 1011.8 1017.1 1025.0 1026.4 1016.6 MAX. QFF PRESSURE IN HPA 1045.7 1039.3 1035.1 1021.6 1019.6 1014.1 1011.5 1012.2 1017.1 1022.7 1035.8 1039.9 1045.7 DAY 27 5 10 1 17 24 29 31 29 23 18 14 MIN. QFF PRESSURE IN HPA 1011.6 1012.5 1007.7 1007.4 1005.3 998.8 996.5 998.4 1007.3 1010.2 1013.3 1006.5 996.5 DAY 7 26 26 3 24 19 24 15 10 21 12 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 865.8 866.3 863.1 860.9 861.7 860.8 860.8 859.7 864.0 866.3 868.3 865.0 863.5 MAX. QFE PRESSURE IN HPA 875.7 874.9 874.0 867.4 866.9 866.3 865.0 863.6 867.6 871.5 876.3 873.6 876.3 DAY 27 5 6 1 17 24 29 12 21 10 18 29 MIN. QFE PRESSURE IN HPA 854.6 856.4 854.2 852.7 857.8 854.4 853.8 855.3 859.8 861.7 860.7 850.8 850.8 DAY 7 26 20 3 24 19 24 7 10 21 12 21 MEAN QNH PRESSURE IN HPA 1022.4 1023.0 1019.3 1016.8 1017.7 1016.6 1016.7 1015.4 1020.3 1023.0 1025.3 1021.5 1019.8 MAX. QNH PRESSURE IN HPA 1033.7 1032.8 1031.8 1024.2 1023.7 1023.0 1021.5 1019.9 1024.5 1028.9 1034.4 1031.3 1034.4 DAY 27 5 6 1 17 24 29 12 21 10 18 29 MIN. QNH PRESSURE IN HPA 1009.6 1011.6 1009.1 1007.4 1013.2 1009.4 1008.7 1010.4 1015.5 1017.7 1016.6 1005.2 1005.2 DAY 7 26 20 3 24 19 24 7 10 21 12 21 MEAN QFF PRESSURE IN HPA 1026.5 1024.4 1017.6 1013.1 1011.3 1007.2 1005.1 1004.0 1010.4 1016.1 1023.6 1025.6 1015.4 MAX. QFF PRESSURE IN HPA 1043.0 1036.7 1031.8 1021.9 1018.0 1014.1 1010.3 1010.0 1014.9 1020.2 1034.2 1039.2 1043.0 DAY 27 4 10 1 17 24 29 30 29 22 18 29 MIN. QFF PRESSURE IN HPA 1008.3 1010.8 1006.4 1005.8 1004.5 998.8 996.3 998.4 1006.1 1010.5 1011.3 1007.5 996.3 DAY 7 26 26 3 24 19 24 7 10 3 12 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.2 866.6 863.2 861.0 861.6 860.4 860.3 859.4 864.1 866.8 868.6 865.5 863.6 MAX. QFE PRESSURE IN HPA 875.7 875.7 873.5 867.2 866.6 865.5 864.4 863.0 867.2 871.3 875.9 873.9 875.9 DAY 27 5 6 1 17 24 29 30 23 10 17 29 MIN. QFE PRESSURE IN HPA 854.6 856.2 854.7 853.3 858.1 853.8 853.9 855.0 860.2 862.6 861.2 851.1 851.1 DAY 7 26 26 3 19 19 24 14 10 29 12 20 MEAN QNH PRESSURE IN HPA 1022.9 1023.3 1019.5 1016.9 1017.6 1016.2 1016.1 1015.1 1020.5 1023.5 1025.7 1022.0 1019.9 MAX. QNH PRESSURE IN HPA 1033.7 1033.7 1031.2 1024.0 1023.3 1022.1 1020.8 1019.2 1024.0 1028.7 1034.0 1031.7 1034.0 DAY 27 5 6 1 17 24 29 30 23 10 17 29 MIN. QNH PRESSURE IN HPA 1009.6 1011.4 1009.7 1008.1 1013.6 1008.7 1008.8 1010.0 1016.0 1018.7 1017.1 1005.6 1005.6 DAY 7 26 26 3 19 19 24 14 10 29 12 20 MEAN QFF PRESSURE IN HPA 1027.9 1025.7 1018.6 1013.8 1011.9 1007.0 1005.0 1004.5 1011.9 1017.9 1025.3 1026.6 1016.4 MAX. QFF PRESSURE IN HPA 1044.4 1039.6 1032.2 1022.4 1017.3 1013.3 1010.3 1009.9 1016.5 1021.8 1035.9 1041.5 1044.4 DAY 25 5 10 1 17 7 29 31 29 22 17 14 MIN. QFF PRESSURE IN HPA 1009.0 1011.9 1005.7 1007.7 1005.9 998.6 997.9 998.2 1008.0 1012.3 1012.8 1007.7 997.9 DAY 7 26 26 3 28 19 24 14 10 3 12 20 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 866.8 867.3 864.3 861.8 862.7 861.4 861.5 860.6 865.2 867.7 869.3 865.9 864.6 MAX. QFE PRESSURE IN HPA 875.7 876.8 874.0 866.9 867.5 866.5 865.2 864.2 868.2 872.4 876.7 874.3 876.8 DAY 26 5 6 1 16 24 29 30 23 10 17 2 MIN. QFE PRESSURE IN HPA 855.6 857.3 855.0 854.0 858.5 855.0 856.0 856.2 861.3 862.7 862.3 851.8 851.8 DAY 7 26 26 3 19 19 24 15 10 29 12 20 MEAN QNH PRESSURE IN HPA 1023.6 1024.1 1020.7 1017.9 1018.9 1017.4 1017.5 1016.4 1021.8 1024.5 1026.4 1022.5 1021.0 MAX. QNH PRESSURE IN HPA 1033.7 1035.0 1031.8 1023.7 1024.3 1023.2 1021.7 1020.6 1025.2 1030.0 1034.9 1032.1 1035.0 DAY 26 5 6 1 16 24 29 30 23 10 17 2 MIN. QNH PRESSURE IN HPA 1010.7 1012.7 1010.0 1008.9 1014.0 1010.0 1011.2 1011.4 1017.3 1018.9 1018.4 1006.4 1006.4 DAY 7 26 26 3 19 19 24 15 10 29 12 20 MEAN QFF PRESSURE IN HPA 1028.7 1026.3 1019.7 1014.5 1012.7 1007.6 1006.0 1005.2 1012.3 1018.2 1025.8 1027.0 1017.0 MAX. QFF PRESSURE IN HPA 1044.5 1040.9 1033.2 1021.2 1018.5 1014.8 1010.8 1011.0 1016.9 1023.1 1036.3 1041.2 1044.5 DAY 25 5 10 1 16 7 29 30 29 22 17 14 MIN. QFF PRESSURE IN HPA 1012.0 1012.9 1003.8 1008.2 1004.5 999.0 998.6 998.7 1007.9 1012.7 1013.3 1008.2 998.6 DAY 7 26 26 3 28 19 24 15 10 29 11 20 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 866.9 867.2 864.4 861.7 863.1 861.8 861.9 860.9 865.4 867.6 869.4 865.7 864.7 MAX. QFE PRESSURE IN HPA 876.9 876.8 874.4 866.2 868.0 867.2 865.8 865.1 868.5 872.4 876.9 874.7 876.9 DAY 26 5 10 1 16 24 29 30 20 10 17 2 MIN. QFE PRESSURE IN HPA 856.7 857.3 855.0 853.2 859.0 855.7 856.2 856.4 861.3 863.0 861.9 849.6 849.6 DAY 7 26 26 3 19 19 23 14 10 21 11 20 MEAN QNH PRESSURE IN HPA 1023.6 1024.0 1020.8 1017.7 1019.3 1017.8 1018.0 1016.8 1022.0 1024.5 1026.6 1022.3 1021.1 MAX. QNH PRESSURE IN HPA 1035.1 1035.0 1032.2 1022.9 1024.9 1024.0 1022.4 1021.6 1025.5 1030.0 1035.1 1032.6 1035.1 DAY 26 5 10 1 16 24 29 30 20 10 17 2 MIN. QNH PRESSURE IN HPA 1012.0 1012.7 1010.0 1008.0 1014.6 1010.8 1011.4 1011.6 1017.3 1019.2 1017.9 1003.9 1003.9 DAY 7 26 26 3 19 19 23 14 10 21 11 20 MEAN QFF PRESSURE IN HPA 1027.9 1025.4 1019.0 1013.9 1012.8 1008.1 1006.3 1005.3 1011.9 1017.3 1025.0 1026.4 1016.6 MAX. QFF PRESSURE IN HPA 1044.6 1039.4 1034.7 1019.0 1019.1 1015.1 1010.9 1012.1 1016.5 1023.4 1035.8 1039.8 1044.6 DAY 26 5 10 1 16 7 29 30 29 22 17 13 MIN. QFF PRESSURE IN HPA 1012.6 1010.5 1003.4 1006.9 1003.8 999.8 998.3 998.8 1006.7 1012.3 1011.8 1005.3 998.3 DAY 7 24 26 3 28 19 24 15 10 29 11 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.8 2.2 4.9 12.1 16.4 21.4 25.6 25.9 20.9 17.2 6.8 2.2 13.1 MINIMUN AIR TEMPERATURE (C) -1.1 -0.7 1.1 7.3 9.3 13.7 17.7 17.7 13.1 10.2 2.9 -0.4 7.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 3 1 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 7 5 3 0 0 0 0 0 0 0 1 9 25 DAYS WITH FREEZING MIN.<= 0 21 18 10 2 0 0 0 0 0 0 8 15 74 TEMPERATURE RECORDS LOWEST(C) -9.0 -5.4 -7.4 -0.8 2.4 7.8 15.0 14.8 9.0 5.6 -4.2 -7.4 -9.0 DAY 18 14 2 1 1 7 31 26 24 31 24 12 MAXIMUM AIR TEMPERATURE (C) 5.7 6.5 9.8 17.7 23.6 28.8 32.6 33.8 28.5 24.7 11.9 5.6 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 13 29 30 10 1 0 0 83 DAYS WITH MAXIMUM TEMP. <= 0 4 0 0 0 0 0 0 0 0 0 0 2 6 TEMPERATURE RECORDS HIGHEST(C) 13.4 12.0 14.8 24.0 27.8 34.4 38.0 41.4 36.4 30.0 18.4 13.4 41.4 DAY 9 8 6 5 20 28 13 11 5 9 1 18 DIF. BETWEEN (MAX.-MIN.) (C) 6.8 7.2 8.7 10.4 14.3 15.1 14.9 16.1 15.4 14.5 9.0 6.0 11.5 MEAN DAILY TEMP. (MDT) (C) 2.3 2.9 5.5 12.5 16.5 21.3 25.2 25.7 20.8 17.5 7.4 2.6 13.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 37.8 128.9 146.7 35.2 0.0 0.0 0.0 348.6 HEATING DEG. DAYS(BASE 18 0C) 486.2 423.4 388.9 167.7 60.3 6.5 0.0 0.0 7.0 32.9 318.5 476.3 2367.7 DEWPOINT (MEAN C) -3.9 -3.6 -2.0 2.5 5.7 7.6 8.5 7.6 4.3 2.7 -0.2 -1.9 2.3 MIXING RATIO (G/KG) 3.38 3.46 4.00 5.46 6.87 7.81 8.44 7.89 6.23 5.54 4.52 3.94 5.63 VAPOUR PRESSURE (HPA) 4.69 4.77 5.50 7.51 9.44 10.68 11.49 10.79 8.57 7.64 6.26 5.46 7.73 SATURATION DEF. (HPA) 2.55 2.55 3.43 7.29 10.19 16.14 22.52 24.31 17.58 13.00 4.02 2.01 10.47 RELATIVE HUMIDITY (MEAN %) 69 68 64 56 53 44 37 34 37 42 64 76 54 RELATIVE HUMIDITY (MAX. %) 81 83 82 73 77 66 55 52 55 62 81 87 71 RELATIVE HUMIDITY (MIN. %) 53 51 45 40 30 26 24 20 22 24 45 62 37 RELATIVE HUMIDITY (MEAN% 03UTC) 77 76 75 67 74 64 53 51 54 58 76 83 67 RELATIVE HUMIDITY (MEAN% 09UTC) 63 59 53 47 38 35 30 28 29 29 51 68 44 RELATIVE HUMIDITY (MEAN% 15UTC) 66 64 57 47 37 31 25 21 27 33 60 74 45 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 18.1 42.6 118.7 90.7 30.6 8.0 0.0 0.2 0.0 28.1 55.5 60.9 453.4 DAYS WITH PRECIPITATION >=10 0 0 6 2 1 0 0 0 0 1 3 3 16 DAYS WITH PRECIPITATION >= 5 2 4 6 6 2 1 0 0 0 2 4 5 32 DAYS WITH PRECIPITATION >= 1 3 11 12 9 4 1 0 0 0 5 7 8 60 DAYS WITH PRECIPITATION 8 17 15 10 12 1 0 1 0 7 8 13 92 GREATEST DAILY PRECIPITATION 8.3 7.2 21.0 28.7 16.0 8.0 0.0 0.2 0.0 14.4 14.0 18.4 28.7 DAY 28 22 20 16 24 15 ** 10 ** 29 11 6 DAY WITH THUNDER STORM 0 1 3 7 8 1 0 0 0 3 3 2 28 DAYS WITH SNOW OR SLEET 7 14 5 1 0 0 0 0 0 0 1 8 36 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 180 180 180 180 360 45 45 180 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 10.7 10.7 10.4 11.6 11.5 6.5 7.4 7.0 9.7 11.3 10.6 10.0 10.6 PREVAILING WIND PERCENT 24.2 40.2 30.2 27.5 9.3 12.9 15.7 13.3 13.3 25.8 20.0 25.4 19.4 CALMS PERCENT OF WIND 62.5 37.9 44.8 42.1 66.9 60.0 56.5 62.1 62.5 59.3 70.8 64.9 57.7 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 192 193 195 200 215 299 17 15 199 196 184 186 195 VECTOR WIND MAGNITUDE(KNOTS) 2.7 5.9 4.2 4.9 0.9 0.5 0.4 0.7 1.0 4.0 2.1 2.6 2.3 WIND STEADINESES (MEAN %) 73.0 90.8 79.2 76.6 31.0 16.7 11.8 25.9 31.3 88.9 72.4 76.5 57.5 WIND SPEED (MEAN KNOTS) 3.7 6.5 5.3 6.4 2.9 3.0 3.4 2.7 3.2 4.5 2.9 3.4 4.0 FASTEST WIND DIRECTION 180 190 180 210 220 360 210 190 210 180 180 210 180 FASTEST WIND SPEED (KNOTS) 17 29 29 33 25 21 16 19 21 35 25 21 35 DAY 6 19 19 6 7 5 8 5 18 29 10 9 DAYS WITH SKY CLEAR (0-2)/8 5 3 5 5 19 27 31 30 30 16 13 7 191 DAYS WITH P.CLOUDY (3-6)/8 14 19 15 15 9 3 0 1 0 13 10 10 109 DAYS WITH CLOUDY (7-8)/8 12 6 11 10 3 0 0 0 0 2 7 14 65 DAYS WITH VISIBILITY =< 2 KM 5 4 3 3 2 0 0 0 1 1 2 7 28 DURATION OF SUNSHINE HOURS 122.8 157.8 198.6 172.7 284.6 355.7 368.0 350.2 312.4 244.2 162.6 107.3 2836.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.6 861.9 862.5 863.6 865.1 861.5 859.1 862.3 864.1 866.3 868.6 868.6 864.2 MAX. QFE PRESSURE IN HPA 874.2 871.1 874.9 871.5 873.2 868.3 866.1 866.0 871.9 872.9 877.8 878.5 878.5 DAY-HOUR 11-21 12- 6 2- 6 30-18 1- 6 6- 6 3- 6 18- 6 22-21 15- 6 25- 6 11-15 MIN. QFE PRESSURE IN HPA 851.5 847.5 848.1 853.5 857.3 854.3 854.3 858.4 858.5 854.7 858.5 855.8 847.5 DAY-HOUR 28-12 19- 3 26- 0 20-15 7- 9 30-15 1-15 14-12 7-12 29- 0 9-15 18-21 MEAN QNH PRESSURE IN HPA 1023.3 1017.9 1018.6 1019.9 1021.6 1017.4 1014.7 1018.4 1020.5 1023.0 1025.6 1025.6 1020.5 MAX. QNH PRESSURE IN HPA 1032.0 1028.5 1032.8 1028.9 1030.9 1025.3 1022.7 1022.6 1029.4 1030.5 1036.1 1036.9 1036.9 DAY-HOUR 11-21 12- 6 2- 6 30-18 1- 6 6- 6 3- 6 18- 6 22-21 15- 6 25- 6 11-15 MIN. QNH PRESSURE IN HPA 1006.0 1001.5 1002.1 1008.3 1012.7 1009.2 1009.2 1013.9 1014.0 1009.7 1014.0 1011.0 1001.5 DAY-HOUR 28-12 19- 3 26- 0 20-15 7- 9 30-15 1-15 14-12 7-12 29- 0 9-15 18-21 MEAN QFF PRESSURE IN HPA 1026.1 1020.1 1019.2 1016.1 1015.3 1008.3 1003.3 1006.9 1011.8 1016.3 1025.2 1028.0 1016.4 MAX. QFF PRESSURE IN HPA 1035.1 1033.1 1039.1 1027.9 1029.3 1020.8 1011.9 1012.4 1024.5 1024.2 1040.1 1042.0 1042.0 DAY-HOUR 11- 6 12- 6 2- 6 29- 6 1- 6 6- 6 3- 6 18- 6 23- 3 23- 3 25- 6 11-18 MIN. QFF PRESSURE IN HPA 1009.1 1003.0 998.8 1002.7 1006.0 999.3 997.6 1001.9 1001.8 1002.3 1011.0 1008.4 997.6 DAY-HOUR 28-12 20- 0 26- 0 20-15 7- 9 30-18 7-15 14-12 5-21 29- 0 9-18 18-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 866.5 861.6 862.2 863.1 865.4 861.8 859.3 862.5 864.3 866.2 868.5 868.5 864.2 MAX. QFE PRESSURE IN HPA 873.3 869.3 872.7 869.2 871.8 867.7 864.6 865.1 871.9 871.1 875.6 877.5 877.5 DAY 12 7 2 30 1 6 4 18 23 16 25 12 MIN. QFE PRESSURE IN HPA 857.0 848.3 848.1 856.0 858.8 857.0 855.5 860.0 859.6 854.7 860.8 857.9 848.1 DAY 29 19 26 21 29 30 1 15 6 29 9 19 MEAN QNH PRESSURE IN HPA 1023.3 1017.6 1018.3 1019.3 1021.9 1017.9 1014.9 1018.6 1020.7 1022.8 1025.5 1025.5 1020.5 MAX. QNH PRESSURE IN HPA 1031.0 1026.4 1030.3 1026.3 1029.3 1024.6 1021.0 1021.6 1029.4 1028.5 1033.6 1035.8 1035.8 DAY 12 7 2 30 1 6 4 18 23 16 25 12 MIN. QNH PRESSURE IN HPA 1012.3 1002.4 1002.1 1011.2 1014.4 1012.3 1010.6 1015.8 1015.3 1009.7 1016.7 1013.4 1002.1 DAY 29 19 26 21 29 30 1 15 6 29 9 19 MEAN QFF PRESSURE IN HPA 1025.7 1019.2 1018.6 1015.4 1015.6 1008.7 1003.5 1006.9 1011.6 1015.7 1024.6 1027.6 1016.1 MAX. QFF PRESSURE IN HPA 1032.5 1028.6 1036.2 1025.1 1027.5 1018.1 1009.9 1011.0 1022.7 1022.1 1035.8 1041.6 1041.6 DAY 12 12 2 29 1 7 3 18 23 23 25 12 MIN. QFF PRESSURE IN HPA 1013.8 1003.0 998.8 1003.4 1006.3 1000.3 998.5 1002.9 1002.1 1002.3 1012.4 1011.4 998.5 DAY 28 20 26 26 29 30 8 15 6 29 9 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 866.5 861.5 862.4 863.4 865.6 862.4 860.0 863.3 864.9 866.6 868.7 868.4 864.5 MAX. QFE PRESSURE IN HPA 872.7 869.2 873.7 869.1 872.1 868.0 865.5 865.8 871.9 871.7 876.0 876.5 876.5 DAY 12 12 2 3 1 6 3 4 23 15 25 12 MIN. QFE PRESSURE IN HPA 855.1 847.5 848.2 855.7 858.7 857.9 855.7 860.6 860.1 858.2 860.4 859.2 847.5 DAY 28 19 26 20 7 30 1 15 7 29 9 19 MEAN QNH PRESSURE IN HPA 1023.2 1017.5 1018.5 1019.6 1022.2 1018.5 1015.7 1019.5 1021.4 1023.4 1025.7 1025.3 1020.9 MAX. QNH PRESSURE IN HPA 1030.3 1026.3 1031.4 1026.2 1029.6 1024.9 1022.1 1022.4 1029.4 1029.2 1034.1 1034.6 1034.6 DAY 12 12 2 3 1 6 3 4 23 15 25 12 MIN. QNH PRESSURE IN HPA 1010.2 1001.5 1002.3 1010.8 1014.3 1013.4 1010.8 1016.5 1015.9 1013.7 1016.2 1014.9 1001.5 DAY 28 19 26 20 7 30 1 15 7 29 9 19 MEAN QFF PRESSURE IN HPA 1026.5 1020.1 1019.6 1016.4 1016.4 1009.8 1004.6 1008.5 1013.4 1017.6 1026.0 1028.1 1017.2 MAX. QFF PRESSURE IN HPA 1033.1 1031.6 1038.1 1025.5 1028.0 1020.6 1011.6 1012.0 1024.5 1024.2 1037.7 1041.5 1041.5 DAY 11 12 2 29 1 6 3 18 23 23 25 12 MIN. QFF PRESSURE IN HPA 1012.8 1003.6 1000.8 1004.8 1007.1 1002.7 999.2 1004.7 1004.4 1007.2 1012.3 1014.4 999.2 DAY 28 19 26 20 29 30 8 13 6 27 9 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 867.5 862.6 863.3 864.1 865.9 862.5 860.1 863.6 865.3 867.3 869.7 869.4 865.1 MAX. QFE PRESSURE IN HPA 873.9 871.1 874.9 870.3 873.2 868.3 866.1 866.0 871.9 872.9 877.8 877.7 877.8 DAY 12 12 2 30 1 6 3 18 23 15 25 11 MIN. QFE PRESSURE IN HPA 854.7 850.0 850.8 856.0 857.9 857.8 855.7 860.8 860.5 859.4 860.9 859.4 850.0 DAY 28 20 26 20 7 30 8 14 7 27 9 6 MEAN QNH PRESSURE IN HPA 1024.4 1018.7 1019.6 1020.5 1022.5 1018.6 1015.9 1019.9 1021.9 1024.1 1026.8 1026.6 1021.6 MAX. QNH PRESSURE IN HPA 1031.7 1028.5 1032.8 1027.6 1030.9 1025.3 1022.7 1022.6 1029.4 1030.5 1036.1 1036.0 1036.1 DAY 12 12 2 30 1 6 3 18 23 15 25 11 MIN. QNH PRESSURE IN HPA 1009.7 1004.3 1005.2 1011.2 1013.4 1013.2 1010.8 1016.7 1016.3 1015.1 1016.8 1015.1 1004.3 DAY 28 20 26 20 7 30 8 14 7 27 9 6 MEAN QFF PRESSURE IN HPA 1027.6 1021.3 1020.6 1016.8 1016.2 1009.5 1004.3 1008.3 1013.1 1017.5 1026.8 1029.2 1017.6 MAX. QFF PRESSURE IN HPA 1035.1 1033.1 1039.1 1027.9 1029.3 1020.8 1011.9 1012.4 1023.7 1023.3 1040.1 1041.2 1041.2 DAY 11 12 2 29 1 6 3 18 23 23 25 25 MIN. QFF PRESSURE IN HPA 1012.4 1005.9 1005.6 1004.6 1006.9 1003.1 998.0 1003.8 1004.1 1007.5 1013.3 1016.0 998.0 DAY 28 20 26 26 29 30 8 13 6 27 10 18 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 866.9 862.3 863.0 863.9 865.2 861.8 859.5 862.7 864.5 866.4 868.8 868.7 864.5 MAX. QFE PRESSURE IN HPA 873.2 870.9 874.5 870.5 872.4 867.7 865.7 865.0 870.5 872.1 876.5 877.4 877.4 DAY 11 12 2 30 1 6 3 8 22 15 25 11 MIN. QFE PRESSURE IN HPA 852.9 849.6 850.8 855.2 857.3 857.1 855.6 860.2 859.9 858.4 859.6 858.4 849.6 DAY 28 19 26 20 7 30 8 14 7 29 9 6 MEAN QNH PRESSURE IN HPA 1023.7 1018.4 1019.2 1020.2 1021.8 1017.8 1015.2 1018.9 1020.9 1023.1 1025.9 1025.7 1020.9 MAX. QNH PRESSURE IN HPA 1030.9 1028.2 1032.4 1027.8 1030.0 1024.6 1022.3 1021.5 1027.8 1029.6 1034.6 1035.7 1035.7 DAY 11 12 2 30 1 6 3 8 22 15 25 11 MIN. QNH PRESSURE IN HPA 1007.6 1003.9 1005.2 1010.3 1012.7 1012.4 1010.7 1016.0 1015.6 1013.9 1015.3 1013.9 1003.9 DAY 28 19 26 20 7 30 8 14 7 29 9 6 MEAN QFF PRESSURE IN HPA 1026.1 1020.4 1019.6 1016.2 1015.1 1008.4 1003.5 1007.1 1011.8 1015.9 1025.0 1027.9 1016.4 MAX. QFF PRESSURE IN HPA 1032.6 1032.9 1037.6 1026.6 1028.1 1019.4 1011.2 1011.4 1021.3 1021.1 1036.6 1039.9 1039.9 DAY 11 12 2 29 1 6 3 17 22 22 25 25 MIN. QFF PRESSURE IN HPA 1010.5 1004.6 1005.3 1003.8 1006.0 1001.6 998.4 1002.7 1003.6 1007.0 1011.9 1014.2 998.4 DAY 28 19 19 20 7 30 8 14 6 27 9 18 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 865.8 861.3 861.9 863.1 864.2 860.4 858.3 861.3 863.0 865.4 867.8 868.0 863.4 MAX. QFE PRESSURE IN HPA 872.1 869.6 872.5 870.5 870.6 866.3 864.4 863.7 869.7 870.7 875.5 877.6 877.6 DAY 11 28 2 30 1 6 3 17 22 15 25 11 MIN. QFE PRESSURE IN HPA 851.5 849.6 851.6 854.7 858.1 855.5 854.4 858.4 858.5 858.8 858.8 858.4 849.6 DAY 28 19 26 20 7 30 1 14 7 29 9 6 MEAN QNH PRESSURE IN HPA 1022.4 1017.2 1017.9 1019.4 1020.6 1016.2 1013.8 1017.2 1019.2 1021.9 1024.7 1024.9 1019.6 MAX. QNH PRESSURE IN HPA 1029.6 1026.7 1030.1 1027.8 1027.9 1023.0 1020.8 1020.0 1026.9 1028.0 1033.5 1035.9 1035.9 DAY 11 28 2 30 1 6 3 17 22 15 25 11 MIN. QNH PRESSURE IN HPA 1006.0 1003.9 1006.1 1009.7 1013.6 1010.6 1009.4 1013.9 1014.0 1014.4 1014.4 1013.9 1003.9 DAY 28 19 26 20 7 30 1 14 7 29 9 6 MEAN QFF PRESSURE IN HPA 1024.6 1019.0 1018.2 1015.4 1014.3 1006.9 1002.3 1005.5 1010.1 1015.0 1023.8 1027.0 1015.2 MAX. QFF PRESSURE IN HPA 1031.3 1031.5 1035.5 1025.5 1025.3 1017.7 1010.2 1009.6 1019.7 1019.8 1035.8 1039.3 1039.3 DAY 11 28 2 30 1 6 3 17 22 22 25 12 MIN. QFF PRESSURE IN HPA 1009.1 1004.3 1005.1 1003.0 1007.0 999.6 998.3 1001.9 1002.9 1007.6 1011.7 1012.0 998.3 DAY 28 19 26 20 29 30 7 14 7 29 9 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.3 861.5 861.9 863.1 864.1 860.2 857.7 860.9 862.9 865.6 868.1 868.4 863.4 MAX. QFE PRESSURE IN HPA 873.0 869.9 872.5 870.7 870.1 865.9 863.8 863.7 869.8 870.4 875.8 878.5 878.5 DAY 11 28 2 30 1 6 3 17 22 15 25 11 MIN. QFE PRESSURE IN HPA 852.9 850.5 852.1 853.5 858.1 854.3 854.3 858.6 858.7 858.5 858.5 859.0 850.5 DAY 28 19 26 20 28 30 1 14 5 28 9 18 MEAN QNH PRESSURE IN HPA 1022.9 1017.4 1017.9 1019.3 1020.5 1015.9 1013.2 1016.8 1019.1 1022.2 1025.0 1025.4 1019.6 MAX. QNH PRESSURE IN HPA 1030.6 1027.1 1030.1 1028.0 1027.3 1022.5 1020.1 1020.0 1027.0 1027.7 1033.8 1036.9 1036.9 DAY 11 28 2 30 1 6 3 17 22 15 25 11 MIN. QNH PRESSURE IN HPA 1007.6 1004.9 1006.7 1008.3 1013.6 1009.2 1009.2 1014.2 1014.3 1014.0 1014.0 1014.6 1004.9 DAY 28 19 26 20 28 30 1 14 5 28 9 18 MEAN QFF PRESSURE IN HPA 1026.1 1020.1 1018.8 1016.0 1014.7 1007.1 1002.1 1005.8 1011.1 1016.5 1025.3 1028.3 1016.0 MAX. QFF PRESSURE IN HPA 1033.6 1032.5 1036.4 1025.8 1025.5 1017.3 1009.5 1009.7 1021.2 1021.6 1036.6 1041.3 1041.3 DAY 11 28 2 30 1 6 3 17 22 17 25 11 MIN. QFF PRESSURE IN HPA 1011.5 1005.9 1007.6 1002.7 1006.6 999.5 997.6 1003.0 1003.8 1007.8 1011.0 1012.1 997.6 DAY 28 19 26 20 28 30 7 23 5 28 9 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 866.9 862.1 862.7 864.1 865.2 861.1 858.9 862.0 864.0 866.5 868.7 868.8 864.2 MAX. QFE PRESSURE IN HPA 873.7 870.5 872.9 871.5 870.2 867.7 864.0 864.4 871.5 871.6 876.4 878.5 878.5 DAY 11 28 1 30 1 5 3 17 22 15 25 11 MIN. QFE PRESSURE IN HPA 854.7 850.8 853.3 855.0 858.8 854.9 855.3 860.1 859.6 857.1 858.9 857.4 850.8 DAY 28 18 12 20 28 30 7 23 5 28 9 18 MEAN QNH PRESSURE IN HPA 1023.6 1018.2 1018.8 1020.4 1021.7 1017.0 1014.5 1018.1 1020.3 1023.2 1025.7 1025.9 1020.6 MAX. QNH PRESSURE IN HPA 1031.4 1027.8 1030.5 1028.9 1027.4 1024.6 1020.3 1020.8 1028.9 1029.0 1034.5 1036.9 1036.9 DAY 11 28 1 30 1 5 3 17 22 15 25 11 MIN. QNH PRESSURE IN HPA 1009.7 1005.2 1008.1 1010.0 1014.4 1009.9 1010.4 1015.9 1015.3 1012.4 1014.5 1012.8 1005.2 DAY 28 18 12 20 28 30 7 23 5 28 9 18 MEAN QFF PRESSURE IN HPA 1026.8 1020.8 1019.7 1016.7 1015.4 1007.9 1002.9 1006.6 1011.6 1016.7 1025.7 1028.5 1016.6 MAX. QFF PRESSURE IN HPA 1035.0 1033.0 1036.8 1026.8 1025.3 1017.9 1009.8 1010.4 1022.5 1021.7 1037.1 1042.0 1042.0 DAY 11 28 1 30 1 5 3 17 22 22 25 11 MIN. QFF PRESSURE IN HPA 1013.9 1007.9 1007.5 1004.3 1006.6 999.3 997.9 1003.3 1003.0 1005.8 1011.0 1010.1 997.9 DAY 28 19 12 20 28 30 7 13 5 28 9 18 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 866.7 862.1 862.5 863.9 865.4 861.6 859.3 862.4 864.2 866.4 868.7 868.6 864.3 MAX. QFE PRESSURE IN HPA 874.2 870.2 873.3 871.5 870.2 867.9 864.5 864.8 871.9 871.2 876.0 877.8 877.8 DAY 11 28 1 30 1 5 3 3 22 15 25 11 MIN. QFE PRESSURE IN HPA 856.0 850.4 852.5 856.0 859.0 856.0 855.6 860.0 859.6 856.1 860.4 855.8 850.4 DAY 28 18 12 20 28 30 7 14 5 28 9 18 MEAN QNH PRESSURE IN HPA 1023.5 1018.2 1018.6 1020.2 1021.9 1017.6 1015.0 1018.5 1020.6 1023.1 1025.7 1025.7 1020.7 MAX. QNH PRESSURE IN HPA 1032.0 1027.4 1031.0 1028.9 1027.4 1024.8 1020.9 1021.3 1029.4 1028.6 1034.1 1036.1 1036.1 DAY 11 28 1 30 1 5 3 3 22 15 25 11 MIN. QNH PRESSURE IN HPA 1011.2 1004.8 1007.2 1011.2 1014.6 1011.2 1010.7 1015.8 1015.3 1011.3 1016.2 1011.0 1004.8 DAY 28 18 12 20 28 30 7 14 5 28 9 18 MEAN QFF PRESSURE IN HPA 1025.9 1020.1 1018.9 1016.2 1015.2 1008.2 1003.3 1006.7 1011.6 1016.0 1024.9 1027.9 1016.2 MAX. QFF PRESSURE IN HPA 1033.8 1032.7 1037.1 1026.7 1024.6 1018.2 1009.3 1010.4 1022.6 1021.3 1034.8 1040.6 1040.6 DAY 11 28 1 30 1 6 3 17 22 22 24 11 MIN. QFF PRESSURE IN HPA 1014.1 1007.0 1005.6 1005.3 1006.9 1000.6 998.8 1003.0 1001.8 1004.0 1012.5 1008.4 998.8 DAY 14 18 25 20 28 30 7 13 5 28 9 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.0 3.6 9.1 10.4 15.7 22.3 24.7 25.6 21.1 16.3 7.3 -1.5 13.0 MINIMUN AIR TEMPERATURE (C) -0.8 -0.9 3.0 3.9 8.9 13.0 16.4 16.9 12.6 9.5 4.0 -5.5 6.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 5 4 2 1 0 0 0 0 0 0 3 20 35 DAYS WITH FREEZING MIN.<= 0 18 17 9 7 0 0 0 0 0 0 7 30 88 TEMPERATURE RECORDS LOWEST(C) -7.4 -8.2 -6.4 -4.6 4.6 9.4 11.0 14.0 8.2 3.8 -5.4 -15.6 -15.6 DAY 21 24 16 6 13 4 1 23 30 24 30 18 MAXIMUM AIR TEMPERATURE (C) 6.2 8.7 15.3 16.5 21.8 29.9 32.1 33.5 29.5 23.6 11.7 3.2 19.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 15 24 31 15 1 0 0 86 DAYS WITH MAXIMUM TEMP. <= 0 1 2 0 0 0 0 0 0 0 0 0 7 10 TEMPERATURE RECORDS HIGHEST(C) 9.6 15.8 24.2 25.6 27.8 34.4 36.6 38.4 36.0 30.8 17.6 10.4 38.4 DAY 22 29 28 14 26 26 19 19 2 1 4 5 DIF. BETWEEN (MAX.-MIN.) (C) 7.0 9.6 12.3 12.6 12.9 16.9 15.7 16.6 16.9 14.1 7.7 8.7 12.6 MEAN DAILY TEMP. (MDT) (C) 2.7 3.9 9.2 10.2 15.3 21.5 24.3 25.2 21.0 16.5 7.9 -1.2 13.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 33.0 101.5 130.2 44.2 2.3 0.0 0.0 311.2 HEATING DEG. DAYS(BASE 18 0C) 474.2 408.9 274.8 234.2 89.5 0.0 0.0 0.0 6.0 70.0 304.1 594.9 2456.6 DEWPOINT (MEAN C) -2.9 -3.8 -2.1 0.4 6.1 5.6 8.7 7.0 2.4 2.7 2.2 -6.4 1.7 MIXING RATIO (G/KG) 3.64 3.51 3.92 4.78 6.97 6.83 8.48 7.64 5.50 5.52 5.56 2.85 5.43 VAPOUR PRESSURE (HPA) 5.02 4.84 5.42 6.58 9.55 9.37 11.58 10.44 7.59 7.65 7.68 3.95 7.47 SATURATION DEF. (HPA) 2.18 3.41 7.12 6.89 9.02 18.84 20.77 23.79 19.16 12.03 3.01 1.73 10.66 RELATIVE HUMIDITY (MEAN %) 72 61 49 54 56 37 40 33 34 44 72 72 52 RELATIVE HUMIDITY (MAX. %) 84 79 70 75 79 58 59 50 50 63 88 88 70 RELATIVE HUMIDITY (MIN. %) 57 42 30 35 36 21 23 20 19 27 54 53 35 RELATIVE HUMIDITY (MEAN% 03UTC) 76 70 65 69 71 54 58 49 50 60 82 85 66 RELATIVE HUMIDITY (MEAN% 09UTC) 62 50 39 44 43 28 31 27 25 33 60 62 42 RELATIVE HUMIDITY (MEAN% 15UTC) 71 59 39 44 44 23 25 22 24 38 70 69 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 92.8 35.5 33.0 103.7 76.4 0.0 11.6 0.0 0.0 6.7 130.9 26.8 517.4 DAYS WITH PRECIPITATION >=10 3 0 1 1 2 0 1 0 0 0 4 1 13 DAYS WITH PRECIPITATION >= 5 4 5 1 5 4 0 1 0 0 0 8 2 30 DAYS WITH PRECIPITATION >= 1 9 5 1 5 8 0 1 0 0 2 13 5 49 DAYS WITH PRECIPITATION 13 11 4 9 12 0 3 0 0 4 14 6 76 GREATEST DAILY PRECIPITATION 34.1 8.6 32.0 68.0 39.0 0.0 10.0 0.0 0.0 4.8 26.0 11.0 68.0 DAY 3 11 7 23 1 ** 9 ** ** 31 17 12 DAY WITH THUNDER STORM 1 0 0 3 7 1 3 0 0 0 3 0 18 DAYS WITH SNOW OR SLEET 10 7 0 1 0 0 0 0 0 0 2 6 26 DAYS WITH DUST 0 0 0 0 0 0 1 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 180 180 180 180 180 180 45 45 45 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 9.8 11.7 11.4 12.5 9.4 8.9 7.0 6.8 5.5 9.2 10.6 11.8 10.4 PREVAILING WIND PERCENT 35.9 39.2 14.9 20.4 21.8 15.0 17.7 12.9 10.8 14.5 20.8 6.5 17.6 CALMS PERCENT OF WIND 47.6 42.7 51.6 50.8 56.9 57.5 57.3 64.1 61.3 64.9 62.1 82.7 58.4 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 188 193 207 193 197 203 13 246 222 205 193 191 196 VECTOR WIND MAGNITUDE(KNOTS) 4.7 6.2 2.1 2.4 2.9 1.0 1.4 0.1 0.9 1.8 3.1 0.8 2.0 WIND STEADINESES (MEAN %) 90.4 95.4 43.7 47.1 72.5 28.6 46.7 3.6 29.0 64.3 86.1 53.3 52.6 WIND SPEED (MEAN KNOTS) 5.2 6.5 4.8 5.1 4.0 3.5 3.0 2.8 3.1 2.8 3.6 1.5 3.8 FASTEST WIND DIRECTION 210 180 210 200 160 210 350 210 190 210 180 190 210 FASTEST WIND SPEED (KNOTS) 19 25 39 29 27 21 17 17 27 27 25 19 39 DAY 23 15 6 3 20 9 9 11 10 9 22 10 DAYS WITH SKY CLEAR (0-2)/8 9 11 7 12 10 30 29 31 30 21 11 15 216 DAYS WITH P.CLOUDY (3-6)/8 13 13 16 9 16 0 2 0 0 8 9 6 92 DAYS WITH CLOUDY (7-8)/8 9 5 8 9 5 0 0 0 0 2 10 10 58 DAYS WITH VISIBILITY =< 2 KM 6 2 0 1 0 0 0 0 0 0 1 7 17 DURATION OF SUNSHINE HOURS 150.8 188.4 202.5 219.1 257.8 378.2 368.8 360.3 316.0 254.3 144.3 133.1 2973.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 863.2 864.6 866.5 863.2 862.3 862.2 861.2 860.8 866.2 868.9 866.7 867.9 864.5 MAX. QFE PRESSURE IN HPA 870.6 871.2 874.9 871.5 867.5 868.8 866.4 865.0 872.5 875.3 873.4 877.6 877.6 DAY-HOUR 1- 0 25- 6 9- 6 12- 6 21- 9 13- 6 7- 6 29- 6 27- 6 27- 6 30- 6 3- 6 MIN. QFE PRESSURE IN HPA 852.4 853.4 858.0 853.0 850.3 856.0 855.5 854.5 858.6 858.8 852.0 858.6 850.3 DAY-HOUR 23-12 15-12 31- 0 16-12 15-12 15-15 10-15 3-12 5-15 21-21 23- 3 15-12 MEAN QNH PRESSURE IN HPA 1019.4 1021.1 1023.2 1019.5 1018.4 1018.3 1017.2 1016.7 1022.8 1026.0 1023.5 1024.8 1020.9 MAX. QNH PRESSURE IN HPA 1027.9 1028.6 1032.8 1028.9 1024.3 1025.8 1023.1 1021.5 1030.1 1033.3 1031.1 1035.9 1035.9 DAY-HOUR 1- 0 25- 6 9- 6 12- 6 21- 9 13- 6 7- 6 29- 6 27- 6 27- 6 30- 6 3- 6 MIN. QNH PRESSURE IN HPA 1007.1 1008.2 1013.5 1007.7 1004.7 1011.2 1010.6 1009.5 1014.2 1014.4 1006.6 1014.2 1004.7 DAY-HOUR 23-12 15-12 31- 0 16-12 15-12 15-15 10-15 3-12 5-15 21-21 23- 3 15-12 MEAN QFF PRESSURE IN HPA 1021.8 1022.6 1021.5 1016.8 1012.5 1008.8 1006.2 1005.4 1014.1 1020.0 1022.6 1029.7 1016.8 MAX. QFF PRESSURE IN HPA 1031.9 1032.9 1033.9 1029.8 1020.1 1018.4 1012.7 1011.0 1024.0 1030.4 1035.7 1042.2 1042.2 DAY-HOUR 1- 6 25- 6 9- 6 6- 6 18- 3 13- 6 7- 6 30- 3 30- 6 27- 6 30- 6 18-15 MIN. QFF PRESSURE IN HPA 1007.1 1007.5 1005.8 1003.8 998.8 1001.8 1000.6 996.6 1001.6 1005.4 1005.1 1017.0 996.6 DAY-HOUR 23-12 14-21 6- 0 16-12 15-12 20-12 10-15 3- 9 5-21 21-21 23- 3 15-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 863.2 864.5 866.5 863.1 862.2 862.4 861.6 860.9 866.3 868.8 866.7 867.8 864.5 MAX. QFE PRESSURE IN HPA 870.6 870.1 873.7 870.1 866.3 867.4 865.6 864.3 871.1 874.2 872.7 875.8 875.8 DAY 1 10 9 12 22 6 7 30 30 27 30 3 MIN. QFE PRESSURE IN HPA 854.6 854.6 858.0 854.1 852.6 859.3 858.5 855.7 859.4 859.3 853.2 859.7 852.6 DAY 24 15 31 3 13 17 12 3 6 22 23 15 MEAN QNH PRESSURE IN HPA 1019.4 1020.9 1023.2 1019.3 1018.3 1018.6 1017.6 1016.8 1023.0 1025.8 1023.5 1024.7 1020.9 MAX. QNH PRESSURE IN HPA 1027.9 1027.3 1031.4 1027.3 1023.0 1024.2 1022.2 1020.7 1028.5 1032.0 1030.3 1033.8 1033.8 DAY 1 10 9 12 22 6 7 30 30 27 30 3 MIN. QNH PRESSURE IN HPA 1009.6 1009.6 1013.5 1009.0 1007.3 1015.0 1014.0 1010.8 1015.1 1015.0 1008.0 1015.4 1007.3 DAY 24 15 31 3 13 17 12 3 6 22 23 15 MEAN QFF PRESSURE IN HPA 1021.5 1022.0 1021.0 1016.5 1012.2 1009.1 1006.6 1005.3 1013.8 1019.3 1022.2 1029.2 1016.6 MAX. QFF PRESSURE IN HPA 1031.5 1031.3 1032.0 1029.0 1019.6 1016.1 1012.0 1010.0 1021.5 1027.8 1034.0 1039.9 1039.9 DAY 1 24 9 6 18 6 1 30 30 27 30 18 MIN. QFF PRESSURE IN HPA 1009.6 1009.4 1005.8 1004.6 1000.2 1004.5 1004.1 998.1 1002.9 1006.5 1005.9 1018.3 998.1 DAY 24 15 6 23 13 24 10 3 6 22 23 15 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 863.1 864.5 866.9 863.4 862.5 863.1 862.1 861.6 866.9 869.3 866.8 867.8 864.8 MAX. QFE PRESSURE IN HPA 869.9 870.0 873.9 870.8 866.9 868.6 866.2 864.6 871.7 874.4 872.8 876.8 876.8 DAY 1 8 9 12 26 13 7 29 27 27 30 3 MIN. QFE PRESSURE IN HPA 854.3 855.2 858.7 854.5 853.5 859.8 858.8 855.9 860.9 862.8 852.0 858.8 852.0 DAY 23 15 31 3 16 15 12 3 6 22 23 15 MEAN QNH PRESSURE IN HPA 1019.3 1021.0 1023.6 1019.7 1018.7 1019.3 1018.2 1017.6 1023.6 1026.4 1023.6 1024.7 1021.3 MAX. QNH PRESSURE IN HPA 1027.1 1027.2 1031.7 1028.1 1023.7 1025.6 1022.9 1021.0 1029.2 1032.2 1030.4 1035.0 1035.0 DAY 1 8 9 12 26 13 7 29 27 27 30 3 MIN. QNH PRESSURE IN HPA 1009.2 1010.3 1014.3 1009.5 1008.3 1015.5 1014.4 1011.1 1016.8 1019.0 1006.6 1014.4 1006.6 DAY 23 15 31 3 16 15 12 3 6 22 23 15 MEAN QFF PRESSURE IN HPA 1022.1 1023.2 1022.4 1017.5 1013.1 1010.1 1007.6 1006.9 1015.8 1021.4 1023.1 1030.2 1017.8 MAX. QFF PRESSURE IN HPA 1031.3 1032.2 1032.5 1029.7 1020.1 1017.4 1012.4 1011.0 1023.4 1029.7 1035.6 1041.8 1041.8 DAY 1 24 9 6 18 13 7 30 30 27 30 3 MIN. QFF PRESSURE IN HPA 1009.5 1010.8 1006.4 1006.5 1003.6 1004.9 1004.1 999.1 1006.3 1013.2 1005.1 1017.7 999.1 DAY 23 14 6 3 16 24 23 3 6 3 23 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 864.0 865.5 867.6 864.0 862.8 863.2 862.3 861.9 867.4 870.3 867.6 868.8 865.5 MAX. QFE PRESSURE IN HPA 870.2 871.2 874.9 871.5 867.2 868.8 866.4 865.0 872.5 875.3 873.4 877.6 877.6 DAY 1 25 9 12 21 13 7 29 27 27 30 3 MIN. QFE PRESSURE IN HPA 854.9 855.8 859.8 855.2 852.8 859.3 859.2 855.3 861.4 864.1 852.6 860.1 852.6 DAY 23 15 31 3 15 15 11 3 5 21 23 15 MEAN QNH PRESSURE IN HPA 1020.4 1022.1 1024.5 1020.3 1018.9 1019.4 1018.4 1018.0 1024.2 1027.6 1024.5 1025.9 1022.0 MAX. QNH PRESSURE IN HPA 1027.4 1028.6 1032.8 1028.9 1024.0 1025.8 1023.1 1021.5 1030.1 1033.3 1031.1 1035.9 1035.9 DAY 1 25 9 12 21 13 7 29 27 27 30 3 MIN. QNH PRESSURE IN HPA 1009.9 1011.0 1015.5 1010.3 1007.5 1015.0 1014.9 1010.4 1017.4 1020.5 1007.3 1015.9 1007.3 DAY 23 15 31 3 15 15 11 3 5 21 23 15 MEAN QFF PRESSURE IN HPA 1023.2 1024.0 1023.0 1017.8 1013.0 1009.8 1007.5 1006.4 1015.5 1021.7 1023.7 1031.0 1018.0 MAX. QFF PRESSURE IN HPA 1031.9 1032.9 1033.9 1029.8 1019.4 1018.4 1012.7 1010.4 1024.0 1030.4 1035.7 1041.9 1041.9 DAY 1 25 9 6 18 13 7 30 30 27 30 18 MIN. QFF PRESSURE IN HPA 1010.3 1012.0 1009.0 1006.7 1002.0 1004.1 1004.5 997.4 1006.0 1012.3 1007.3 1019.7 997.4 DAY 23 15 6 3 15 29 23 3 6 3 23 15 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 863.4 865.2 867.0 863.6 862.4 862.5 861.7 861.2 866.4 869.3 866.9 868.2 864.8 MAX. QFE PRESSURE IN HPA 868.6 871.0 874.2 870.2 867.5 868.3 865.4 864.6 871.5 874.2 872.2 876.0 876.0 DAY 1 25 9 12 21 13 7 29 27 27 30 3 MIN. QFE PRESSURE IN HPA 854.1 855.4 859.3 855.8 850.9 858.5 858.2 854.8 859.7 862.9 853.5 859.2 850.9 DAY 23 15 31 23 15 15 12 3 5 21 23 15 MEAN QNH PRESSURE IN HPA 1019.7 1021.7 1023.8 1019.9 1018.5 1018.6 1017.7 1017.1 1023.1 1026.4 1023.6 1025.1 1021.3 MAX. QNH PRESSURE IN HPA 1025.6 1028.4 1032.0 1027.4 1024.3 1025.3 1021.9 1021.0 1028.9 1032.0 1029.7 1034.1 1034.1 DAY 1 25 9 12 21 13 7 29 27 27 30 3 MIN. QNH PRESSURE IN HPA 1009.0 1010.5 1015.0 1011.0 1005.3 1014.0 1013.7 1009.8 1015.4 1019.1 1008.3 1014.9 1005.3 DAY 23 15 31 23 15 15 12 3 5 21 23 15 MEAN QFF PRESSURE IN HPA 1021.7 1022.8 1021.8 1017.0 1012.3 1008.8 1006.6 1005.3 1013.8 1019.8 1022.3 1029.6 1016.8 MAX. QFF PRESSURE IN HPA 1029.7 1031.3 1032.5 1028.3 1019.2 1017.7 1011.5 1009.7 1021.4 1027.7 1033.6 1041.1 1041.1 DAY 1 25 9 5 21 13 7 29 30 27 30 18 MIN. QFF PRESSURE IN HPA 1009.0 1011.7 1009.7 1007.5 999.2 1003.3 1003.5 996.6 1004.0 1010.2 1009.2 1017.7 996.6 DAY 23 15 5 23 15 29 23 3 5 3 23 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 862.6 863.9 865.8 862.6 861.7 861.3 860.2 859.9 865.1 868.0 866.0 867.2 863.7 MAX. QFE PRESSURE IN HPA 867.6 869.9 872.7 869.0 866.4 866.9 863.9 863.5 870.0 872.8 871.6 874.9 874.9 DAY 11 29 8 27 18 13 6 29 27 27 29 3 MIN. QFE PRESSURE IN HPA 852.4 853.4 858.5 853.0 850.3 856.8 857.1 854.5 859.0 860.9 855.9 858.6 850.3 DAY 23 15 31 16 15 15 10 3 5 21 23 15 MEAN QNH PRESSURE IN HPA 1018.7 1020.3 1022.4 1018.7 1017.7 1017.3 1016.0 1015.6 1021.6 1024.9 1022.6 1024.0 1020.0 MAX. QNH PRESSURE IN HPA 1024.5 1027.1 1030.3 1026.1 1023.1 1023.7 1020.2 1019.8 1027.2 1030.4 1029.0 1032.8 1032.8 DAY 11 29 8 27 18 13 6 29 27 27 29 3 MIN. QNH PRESSURE IN HPA 1007.1 1008.2 1014.0 1007.7 1004.7 1012.1 1012.4 1009.5 1014.6 1016.8 1011.1 1014.2 1004.7 DAY 23 15 31 16 15 15 10 3 5 21 23 15 MEAN QFF PRESSURE IN HPA 1020.7 1021.3 1020.2 1015.7 1011.7 1007.8 1004.9 1004.0 1012.5 1018.4 1021.3 1028.5 1015.6 MAX. QFF PRESSURE IN HPA 1028.3 1029.8 1029.6 1027.2 1018.9 1015.6 1009.8 1008.6 1020.3 1026.3 1032.6 1040.2 1040.2 DAY 11 24 8 5 18 5 6 29 30 27 29 18 MIN. QFF PRESSURE IN HPA 1007.1 1010.9 1008.8 1003.8 998.8 1001.8 1001.7 996.8 1003.9 1010.2 1011.0 1017.0 996.8 DAY 23 14 30 16 15 20 22 3 5 21 17 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 862.9 864.0 865.7 862.4 861.6 861.0 859.7 859.5 865.0 868.1 866.3 867.5 863.7 MAX. QFE PRESSURE IN HPA 869.0 869.9 873.2 868.9 866.2 866.5 863.2 863.0 869.5 872.2 872.1 875.2 875.2 DAY 11 29 8 27 18 5 7 29 27 26 29 3 MIN. QFE PRESSURE IN HPA 853.3 853.5 858.5 853.5 851.4 856.0 855.5 854.5 858.6 860.2 856.9 859.4 851.4 DAY 23 22 30 16 15 15 10 3 5 21 22 15 MEAN QNH PRESSURE IN HPA 1019.1 1020.3 1022.3 1018.5 1017.6 1016.9 1015.5 1015.2 1021.5 1025.0 1023.0 1024.4 1020.0 MAX. QNH PRESSURE IN HPA 1026.1 1027.1 1030.9 1025.9 1022.9 1023.2 1019.4 1019.2 1026.6 1029.7 1029.6 1033.2 1033.2 DAY 11 29 8 27 18 5 7 29 27 26 29 3 MIN. QNH PRESSURE IN HPA 1008.1 1008.3 1014.0 1008.3 1005.9 1011.2 1010.6 1009.5 1014.2 1016.0 1012.2 1015.1 1005.9 DAY 23 22 30 16 15 15 10 3 5 21 22 15 MEAN QFF PRESSURE IN HPA 1021.9 1022.4 1021.0 1016.2 1012.0 1007.7 1004.8 1004.5 1013.8 1020.0 1022.6 1029.8 1016.4 MAX. QFF PRESSURE IN HPA 1030.4 1030.7 1031.7 1027.3 1018.6 1015.3 1008.9 1009.1 1022.1 1027.9 1034.5 1042.2 1042.2 DAY 11 24 8 5 18 5 5 29 30 27 28 18 MIN. QFF PRESSURE IN HPA 1008.9 1009.4 1009.0 1005.8 1001.6 1002.0 1000.6 998.4 1004.1 1010.5 1010.2 1019.3 998.4 DAY 23 22 5 16 15 15 10 3 5 21 22 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 863.4 864.8 866.5 863.4 862.7 862.1 860.8 860.7 866.1 868.9 866.9 868.1 864.5 MAX. QFE PRESSURE IN HPA 869.0 870.4 873.9 869.8 867.3 866.8 864.0 864.1 870.3 873.8 872.7 875.6 875.6 DAY 11 29 8 27 18 5 5 29 26 26 29 3 MIN. QFE PRESSURE IN HPA 853.7 855.1 858.8 854.8 853.9 857.5 857.3 855.3 858.8 859.8 855.0 859.7 853.7 DAY 23 22 30 16 15 15 10 3 5 21 22 15 MEAN QNH PRESSURE IN HPA 1019.6 1021.3 1023.2 1019.6 1018.9 1018.1 1016.7 1016.6 1022.7 1025.9 1023.6 1025.0 1020.9 MAX. QNH PRESSURE IN HPA 1026.1 1027.7 1031.7 1027.0 1024.1 1023.5 1020.3 1020.5 1027.6 1031.6 1030.3 1033.6 1033.6 DAY 11 29 8 27 18 5 5 29 26 26 29 3 MIN. QNH PRESSURE IN HPA 1008.6 1010.2 1014.4 1009.8 1008.8 1012.9 1012.7 1010.4 1014.4 1015.5 1010.0 1015.4 1008.6 DAY 23 22 30 16 15 15 10 3 5 21 22 15 MEAN QFF PRESSURE IN HPA 1022.3 1023.1 1021.6 1017.0 1013.0 1008.5 1005.7 1005.1 1014.1 1020.1 1023.0 1030.1 1017.0 MAX. QFF PRESSURE IN HPA 1030.7 1032.0 1032.5 1029.7 1019.1 1014.8 1009.8 1009.4 1021.5 1028.4 1034.4 1042.0 1042.0 DAY 11 24 8 5 18 13 5 29 30 26 28 18 MIN. QFF PRESSURE IN HPA 1009.3 1008.4 1009.4 1006.9 1003.5 1002.8 1001.8 997.3 1002.3 1007.5 1008.5 1020.2 997.3 DAY 23 14 30 22 12 15 22 3 5 21 22 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 863.2 864.8 866.5 863.6 862.8 862.5 861.4 861.0 866.4 868.9 866.8 868.0 864.7 MAX. QFE PRESSURE IN HPA 868.9 870.4 873.9 870.2 867.1 867.6 864.9 864.5 870.8 874.2 872.3 875.9 875.9 DAY 29 29 8 27 22 5 6 29 29 26 29 3 MIN. QFE PRESSURE IN HPA 854.3 854.1 858.8 855.1 853.8 859.1 858.6 855.9 859.1 858.8 855.3 860.2 853.8 DAY 23 14 30 16 15 23 10 3 5 21 22 15 MEAN QNH PRESSURE IN HPA 1019.4 1021.2 1023.2 1019.8 1019.0 1018.6 1017.4 1016.9 1023.0 1026.0 1023.6 1025.0 1021.1 MAX. QNH PRESSURE IN HPA 1025.9 1027.7 1031.7 1027.4 1023.9 1024.5 1021.4 1020.9 1028.1 1032.0 1029.8 1034.0 1034.0 DAY 29 29 8 27 22 5 6 29 29 26 29 3 MIN. QNH PRESSURE IN HPA 1009.2 1009.0 1014.4 1010.2 1008.7 1014.7 1014.2 1011.1 1014.7 1014.4 1010.4 1016.0 1008.7 DAY 23 14 30 16 15 23 10 3 5 21 22 15 MEAN QFF PRESSURE IN HPA 1021.5 1022.3 1021.1 1016.9 1012.8 1008.8 1006.3 1005.3 1013.9 1019.4 1022.4 1029.5 1016.7 MAX. QFF PRESSURE IN HPA 1029.2 1030.9 1032.3 1029.5 1019.4 1016.0 1011.0 1010.1 1021.3 1027.8 1033.6 1039.5 1039.5 DAY 29 24 8 5 21 5 6 29 30 26 29 18 MIN. QFF PRESSURE IN HPA 1008.9 1007.5 1007.8 1006.9 1001.9 1003.1 1002.5 997.9 1001.6 1005.4 1009.1 1019.3 997.9 DAY 23 14 5 22 12 23 22 3 5 21 17 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 M MEANS AND EXTREMES FOR THE YEAR 2005 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.5 -1.8 7.8 13.1 16.3 22.4 26.9 26.1 21.5 14.9 7.3 5.1 13.2 MINIMUN AIR TEMPERATURE (C) -4.8 -5.6 3.2 6.9 9.4 14.0 18.6 18.1 13.4 8.2 2.9 0.6 7.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 2 0 0 0 0 5 DAYS WITH MINIMUM TEMP. <=-4 18 16 1 0 0 0 0 0 0 0 0 6 41 DAYS WITH FREEZING MIN.<= 0 26 23 8 2 0 0 0 0 0 3 7 15 84 TEMPERATURE RECORDS LOWEST(C) -13.2 -19.4 -5.0 -1.4 4.6 9.0 15.2 15.4 10.6 -0.6 -2.0 -8.0 -19.4 DAY 26 12 26 6 6 7 1 31 29 25 25 30 MAXIMUM AIR TEMPERATURE (C) 2.6 3.1 13.0 19.1 22.8 29.5 34.3 33.5 29.2 22.2 13.0 10.9 19.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 15 31 27 15 0 0 0 88 DAYS WITH MAXIMUM TEMP. <= 0 7 10 0 0 0 0 0 0 0 0 0 0 17 TEMPERATURE RECORDS HIGHEST(C) 10.8 12.4 20.6 29.4 29.2 34.6 38.8 38.6 34.4 29.6 22.8 21.8 38.8 DAY 2 28 30 24 27 16 18 20 10 11 1 4 DIF. BETWEEN (MAX.-MIN.) (C) 7.4 8.7 9.8 12.2 13.4 15.5 15.7 15.4 15.8 14.0 10.1 10.3 12.3 MEAN DAILY TEMP. (MDT) (C) -1.1 -1.2 8.1 13.0 16.1 21.7 26.5 25.8 21.3 15.2 8.0 5.7 13.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 41.3 170.1 148.3 26.7 0.6 0.0 0.0 387.0 HEATING DEG. DAYS(BASE 18 0C) 592.9 538.6 306.3 155.4 68.6 0.0 0.0 0.0 0.4 99.2 301.4 380.4 2443.2 DEWPOINT (MEAN C) -5.7 -6.2 -2.2 2.4 5.6 5.1 8.7 8.0 4.0 0.5 -0.4 -2.3 1.5 MIXING RATIO (G/KG) 2.98 2.99 3.88 5.45 6.75 6.61 8.64 8.14 6.15 4.84 4.38 3.84 5.39 VAPOUR PRESSURE (HPA) 4.12 4.13 5.35 7.51 9.27 9.05 11.78 11.12 8.45 6.70 6.07 5.32 7.41 SATURATION DEF. (HPA) 1.62 1.74 5.71 8.61 10.17 19.39 25.08 24.12 18.37 11.47 4.64 4.06 11.25 RELATIVE HUMIDITY (MEAN %) 76 74 53 52 53 36 36 35 36 41 62 62 51 RELATIVE HUMIDITY (MAX. %) 89 87 70 75 77 58 54 52 55 62 80 79 70 RELATIVE HUMIDITY (MIN. %) 60 57 36 32 32 20 20 22 20 24 42 43 34 RELATIVE HUMIDITY (MEAN% 03UTC) 84 84 64 71 73 53 52 50 54 58 78 73 66 RELATIVE HUMIDITY (MEAN% 09UTC) 68 64 42 39 40 26 26 29 27 29 50 50 41 RELATIVE HUMIDITY (MEAN% 15UTC) 72 67 46 42 40 23 23 24 24 33 54 56 42 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 63.1 64.6 12.7 65.5 48.2 0.3 1.8 1.0 4.0 13.6 23.5 27.0 325.3 DAYS WITH PRECIPITATION >=10 4 1 0 2 1 0 0 0 0 0 1 1 10 DAYS WITH PRECIPITATION >= 5 5 4 1 4 3 0 0 0 0 1 2 2 22 DAYS WITH PRECIPITATION >= 1 6 10 3 7 7 0 1 1 1 3 3 4 46 DAYS WITH PRECIPITATION 11 12 9 9 10 1 2 1 1 4 6 6 72 GREATEST DAILY PRECIPITATION 20.0 19.0 6.0 30.0 25.0 0.3 1.0 1.0 4.0 6.8 10.2 11.8 30.0 DAY 18 6 10 16 3 2 26 11 30 4 8 23 DAY WITH THUNDER STORM 0 0 0 4 6 0 1 0 0 1 1 0 13 DAYS WITH SNOW OR SLEET 9 9 3 1 0 0 0 0 0 0 1 1 24 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 180 180 180 180 180 180 45 45 180 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 9.8 10.6 12.0 10.2 10.2 9.6 6.1 7.0 10.5 11.0 9.1 9.3 10.3 PREVAILING WIND PERCENT 15.7 16.5 39.5 21.7 10.9 15.8 14.9 15.7 15.0 20.2 15.0 24.2 16.9 CALMS PERCENT OF WIND 74.2 67.4 34.7 49.6 61.7 50.4 59.3 60.5 59.2 59.7 73.3 62.5 59.3 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 187 194 194 202 204 202 3 10 197 196 188 191 196 VECTOR WIND MAGNITUDE(KNOTS) 1.9 2.0 6.2 3.5 1.4 1.5 1.2 1.1 1.6 3.1 1.4 3.0 1.9 WIND STEADINESES (MEAN %) 79.2 66.7 82.7 74.5 41.2 36.6 41.4 35.5 47.1 79.5 66.7 88.2 51.4 WIND SPEED (MEAN KNOTS) 2.4 3.0 7.5 4.7 3.4 4.1 2.9 3.1 3.4 3.9 2.1 3.4 3.7 FASTEST WIND DIRECTION 210 190 210 260 210 210 210 210 210 210 200 210 210 FASTEST WIND SPEED (KNOTS) 29 19 39 25 23 25 16 17 19 29 17 21 39 DAY 31 1 30 2 2 6 15 21 11 19 1 16 DAYS WITH SKY CLEAR (0-2)/8 7 11 12 11 13 28 29 30 28 22 13 19 223 DAYS WITH P.CLOUDY (3-6)/8 12 7 14 12 15 2 2 1 2 9 14 9 99 DAYS WITH CLOUDY (7-8)/8 12 10 5 7 3 0 0 0 0 0 3 3 43 DAYS WITH VISIBILITY =< 2 KM 13 6 0 0 0 0 0 0 0 0 0 1 20 DURATION OF SUNSHINE HOURS 96.7 135.0 217.5 237.2 298.0 365.8 370.5 353.4 307.2 268.4 176.2 195.2 3021.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 865.7 864.4 863.0 865.5 863.8 861.5 860.7 861.4 863.8 867.8 868.4 868.3 864.5 MAX. QFE PRESSURE IN HPA 874.1 875.4 869.9 874.7 868.8 867.1 864.8 866.9 868.2 877.0 875.5 877.8 877.8 DAY-HOUR 9- 6 16- 6 26- 6 6- 6 22- 6 7- 6 28- 6 29-21 7- 3 23- 6 23- 9 29- 6 MIN. QFE PRESSURE IN HPA 852.9 853.7 854.1 858.5 854.6 854.8 854.4 855.5 859.5 859.2 859.4 855.7 852.9 DAY-HOUR 23- 3 1-15 24- 3 2-15 3- 3 20-12 5-15 8-15 11-12 19-18 5-12 23-15 MEAN QNH PRESSURE IN HPA 1022.3 1020.8 1019.2 1022.1 1020.1 1017.5 1016.6 1017.4 1020.1 1024.6 1025.4 1025.3 1020.9 MAX. QNH PRESSURE IN HPA 1031.9 1033.4 1027.1 1032.6 1025.8 1023.9 1021.3 1023.7 1025.2 1035.2 1033.5 1036.1 1036.1 DAY-HOUR 9- 6 16- 6 26- 6 6- 6 22- 6 7- 6 28- 6 29-21 7- 3 23- 6 23- 9 29- 6 MIN. QNH PRESSURE IN HPA 1007.6 1008.6 1009.0 1014.0 1009.6 1009.8 1009.4 1010.6 1015.2 1014.9 1015.1 1010.8 1007.6 DAY-HOUR 23- 3 1-15 24- 3 2-15 3- 3 20-12 5-15 8-15 11-12 19-18 5-12 23-15 MEAN QFF PRESSURE IN HPA 1027.1 1025.8 1018.1 1017.9 1013.8 1007.9 1004.4 1005.7 1011.1 1019.5 1024.7 1026.0 1016.8 MAX. QFF PRESSURE IN HPA 1039.1 1044.0 1031.8 1034.3 1019.9 1016.3 1009.9 1013.7 1018.0 1035.4 1034.2 1043.1 1044.0 DAY-HOUR 29- 6 16- 6 26- 6 6- 3 22- 3 7- 3 8- 3 29-21 30-21 23- 6 25- 6 29- 6 MIN. QFF PRESSURE IN HPA 1008.5 1008.8 1006.0 1007.9 1004.7 998.9 997.4 998.5 1004.2 1008.1 1010.8 1009.9 997.4 DAY-HOUR 3- 3 1-15 23-12 30-18 3- 6 20- 9 5-12 20-12 11-21 19-15 5-12 16-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 865.9 864.2 862.9 865.4 863.7 861.7 860.9 861.6 863.9 867.8 868.4 868.4 864.6 MAX. QFE PRESSURE IN HPA 872.5 874.0 867.6 873.3 868.0 866.1 864.0 865.8 866.9 875.5 872.9 877.4 877.4 DAY 9 16 26 6 18 8 28 30 7 23 25 31 MIN. QFE PRESSURE IN HPA 853.3 856.0 854.2 860.0 855.1 856.0 855.4 856.9 859.8 859.5 863.5 856.7 853.3 DAY 23 2 24 16 3 21 6 8 12 20 6 24 MEAN QNH PRESSURE IN HPA 1022.5 1020.5 1019.1 1022.0 1020.0 1017.7 1016.8 1017.6 1020.2 1024.7 1025.3 1025.4 1021.0 MAX. QNH PRESSURE IN HPA 1030.1 1031.8 1024.5 1031.0 1024.9 1022.7 1020.3 1022.4 1023.7 1033.5 1030.5 1035.7 1035.7 DAY 9 16 26 6 18 8 28 30 7 23 25 31 MIN. QNH PRESSURE IN HPA 1008.1 1011.2 1009.1 1015.8 1010.2 1011.2 1010.5 1012.2 1015.5 1015.2 1019.8 1012.0 1008.1 DAY 23 2 24 16 3 21 6 8 12 20 6 24 MEAN QFF PRESSURE IN HPA 1027.0 1025.1 1017.8 1017.6 1013.8 1008.2 1004.7 1005.5 1010.9 1019.2 1024.1 1025.3 1016.6 MAX. QFF PRESSURE IN HPA 1037.9 1041.5 1028.2 1032.5 1018.7 1014.8 1008.6 1012.4 1015.4 1033.4 1031.6 1040.6 1041.5 DAY 29 16 26 6 22 7 8 30 7 23 25 31 MIN. QFF PRESSURE IN HPA 1009.6 1011.7 1006.9 1009.5 1005.2 999.4 998.7 1000.0 1004.4 1008.8 1014.7 1012.7 998.7 DAY 3 1 24 26 3 21 6 9 12 20 5 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 865.7 864.3 863.1 865.8 864.0 862.2 861.6 862.3 864.5 868.1 868.5 868.4 864.9 MAX. QFE PRESSURE IN HPA 872.5 874.5 868.5 874.1 868.5 866.9 864.5 865.8 868.2 875.9 872.8 877.2 877.2 DAY 9 16 26 6 22 7 8 30 7 23 23 31 MIN. QFE PRESSURE IN HPA 852.9 856.1 854.1 860.1 854.6 856.1 855.9 857.4 860.7 859.5 863.5 857.6 852.9 DAY 23 1 24 2 3 20 6 8 12 20 8 24 MEAN QNH PRESSURE IN HPA 1022.3 1020.7 1019.3 1022.4 1020.4 1018.3 1017.6 1018.4 1020.9 1025.0 1025.5 1025.4 1021.4 MAX. QNH PRESSURE IN HPA 1030.1 1032.4 1025.5 1031.9 1025.5 1023.7 1020.9 1022.4 1025.2 1034.0 1030.4 1035.4 1035.4 DAY 9 16 26 6 22 7 8 30 7 23 23 31 MIN. QNH PRESSURE IN HPA 1007.6 1011.3 1009.0 1015.9 1009.6 1011.3 1011.1 1012.8 1016.6 1015.2 1019.8 1013.0 1007.6 DAY 23 1 24 2 3 20 6 8 12 20 8 24 MEAN QFF PRESSURE IN HPA 1027.5 1026.2 1018.8 1018.8 1014.6 1009.0 1005.9 1007.2 1012.8 1020.7 1025.5 1026.7 1017.8 MAX. QFF PRESSURE IN HPA 1038.4 1043.8 1030.5 1034.3 1019.9 1016.3 1009.9 1013.0 1018.0 1034.8 1033.3 1041.8 1043.8 DAY 29 16 26 6 22 7 8 30 7 23 25 31 MIN. QFF PRESSURE IN HPA 1008.5 1011.6 1009.0 1010.0 1005.3 1000.0 1000.0 1001.2 1007.3 1009.5 1015.9 1013.1 1000.0 DAY 3 1 24 26 3 20 6 8 11 20 5 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION MAHABAD (40726) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 36 46 N LONGITUDE 45 43 E DATA PROCESSING CENTER ELEVATION 1385.0 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 866.6 865.2 863.8 866.3 864.4 862.4 861.8 862.6 864.9 868.8 869.4 869.4 865.5 MAX. QFE PRESSURE IN HPA 874.1 875.4 869.9 874.7 868.8 867.1 864.8 866.0 868.2 877.0 875.3 877.8 877.8 DAY 9 16 26 6 22 7 28 30 7 23 23 29 MIN. QFE PRESSURE IN HPA 854.5 857.1 855.0 859.6 854.6 855.8 856.1 857.4 860.6 860.1 863.4 859.5 854.5 DAY 3 1 24 2 3 20 6 8 11 20 5 17 MEAN QNH PRESSURE IN HPA 1023.3 1021.8 1020.1 1023.0 1020.8 1018.5 1017.9 1018.7 1021.4 1025.9 1026.5 1026.5 1022.0 MAX. QNH PRESSURE IN HPA 1031.9 1033.4 1027.1 1032.6 1025.8 1023.9 1021.3 1022.6 1025.2 1035.2 1033.3 1036.1 1036.1 DAY 9 16 26 6 22 7 28 30 7 23 23 29 MIN. QNH PRESSURE IN HPA 1009.5 1012.4 1010.0 1015.3 1009.6 1011.0 1011.3 1012.8 1016.5 1015.9 1019.7 1015.2 1009.5 DAY 3 1 24 2 3 20 6 8 11 20 5 17 MEAN QFF PRESSURE IN HPA 1028.5 1027.1 1019.2 1018.7 1014.4 1008.8 1005.7 1007.0 1012.3 1020.8 1026.1 1027.7 1018.0 MAX. QFF PRESSURE IN HPA 1039.1 1044.0 1031.8 1034.3 1019.9 1015.5 1009.3 1013.1 1017.4 1035.4 1034.2 1043.1 1044.0 DAY 29 16 26 6 21 7 8 30 7 23 25 29 MIN. QFF PRESSURE IN HPA 1009.2 1012.6 1009.7 1010.3 1004.7 999.5 999.1 999.4 1005.5 1010.2 1015.3 1013.1 999.1 DAY 3 1 24 30 3 20 5 8 11 20 5 16 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 866.0 865.0 863.4 865.9 864.0 861.8 861.1 861.7 864.0 867.9 868.6 868.5 864.8 MAX. QFE PRESSURE IN HPA 873.6 874.7 869.1 873.4 868.3 866.8 863.9 865.2 866.9 875.8 875.5 876.8 876.8 DAY 9 16 26 6 21 7 28 30 7 23 23 29 MIN. QFE PRESSURE IN HPA 854.4 856.4 856.8 859.4 855.8 855.1 855.3 856.7 860.2 860.0 862.2 859.2 854.4 DAY 24 1 24 2 3 20 5 8 11 20 5 16 MEAN QNH PRESSURE IN HPA 1022.7 1021.4 1019.7 1022.5 1020.4 1017.9 1017.0 1017.7 1020.3 1024.8 1025.6 1025.4 1021.3 MAX. QNH PRESSURE IN HPA 1031.3 1032.6 1026.2 1031.1 1025.3 1023.5 1020.2 1021.7 1023.7 1033.8 1033.5 1035.0 1035.0 DAY 9 16 26 6 21 7 28 30 7 23 23 29 MIN. QNH PRESSURE IN HPA 1009.4 1011.6 1012.1 1015.1 1011.0 1010.2 1010.4 1012.0 1016.0 1015.8 1018.3 1014.9 1009.4 DAY 24 1 24 2 3 20 5 8 11 20 5 16 MEAN QFF PRESSURE IN HPA 1027.1 1026.0 1018.2 1017.9 1013.8 1008.1 1004.7 1005.7 1010.8 1019.0 1024.5 1025.6 1016.8 MAX. QFF PRESSURE IN HPA 1037.3 1042.2 1030.4 1032.3 1019.9 1015.4 1008.7 1012.5 1015.3 1033.6 1033.3 1040.9 1042.2 DAY 29 16 26 6 21 7 8 30 7 23 23 29 MIN. QFF PRESSURE IN HPA 1009.6 1011.9 1009.4 1008.5 1006.4 998.9 997.7 998.9 1004.9 1009.8 1014.7 1012.6 997.7 DAY 3 1 23 25 3 20 5 8 11 20 5 16 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 865.1 863.8 862.2 864.9 863.1 860.8 859.7 860.2 862.7 866.8 867.5 867.3 863.7 MAX. QFE PRESSURE IN HPA 872.1 873.5 866.4 872.2 867.0 865.2 862.8 863.6 865.4 874.4 875.0 875.6 875.6 DAY 9 16 26 5 21 8 19 30 7 23 23 29 MIN. QFE PRESSURE IN HPA 853.8 854.7 855.1 858.9 856.1 854.8 854.6 855.8 859.5 860.1 859.4 856.7 853.8 DAY 24 1 23 2 3 20 5 8 11 20 5 23 MEAN QNH PRESSURE IN HPA 1021.6 1020.1 1018.3 1021.4 1019.3 1016.6 1015.4 1016.0 1018.8 1023.5 1024.3 1024.1 1020.0 MAX. QNH PRESSURE IN HPA 1029.6 1031.2 1023.1 1029.7 1023.8 1021.7 1019.0 1019.9 1021.9 1032.2 1032.9 1033.6 1033.6 DAY 9 16 26 5 21 8 19 30 7 23 23 29 MIN. QNH PRESSURE IN HPA 1008.7 1009.7 1010.2 1014.5 1011.3 1009.8 1009.6 1011.0 1015.2 1015.9 1015.1 1012.0 1008.7 DAY 24 1 23 2 3 20 5 8 11 20 5 23 MEAN QFF PRESSURE IN HPA 1026.0 1024.6 1016.9 1017.0 1013.1 1007.1 1003.3 1004.1 1009.5 1018.0 1023.1 1024.1 1015.6 MAX. QFF PRESSURE IN HPA 1035.9 1040.4 1025.9 1030