STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.5 0.5 0.8 9.9 13.4 16.6 22.1 21.8 19.4 12.1 4.0 -1.2 10.0 MINIMUN AIR TEMPERATURE (C) -3.4 -3.1 -3.1 6.0 7.9 10.6 15.7 14.8 11.4 7.9 1.8 -4.5 5.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 13 11 10 0 0 0 0 0 0 0 1 19 54 DAYS WITH FREEZING MIN.<= 0 24 22 28 0 0 0 0 0 0 0 12 25 111 TEMPERATURE RECORDS LOWEST(C) -16.2 -13.0 -13.2 1.0 4.2 4.8 11.2 10.6 6.0 2.4 -4.2 -14.0 -16.2 DAY 21 11 3 5 6 22 22 6 30 25 30 12 MAXIMUM AIR TEMPERATURE (C) 4.9 4.9 5.6 14.6 19.4 22.7 28.6 28.5 26.9 18.1 7.5 2.7 15.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 10 9 5 0 0 0 24 DAYS WITH MAXIMUM TEMP. <= 0 4 3 4 0 0 0 0 0 0 0 0 11 22 TEMPERATURE RECORDS HIGHEST(C) 9.6 12.2 14.2 22.2 26.6 27.2 35.4 32.2 32.0 24.8 19.6 10.2 35.4 DAY 6 27 28 15 25 12 9 1 22 19 2 25 DIF. BETWEEN (MAX.-MIN.) (C) 8.3 8.0 8.7 8.6 11.5 12.1 12.9 13.7 15.5 10.2 5.7 7.2 10.2 MEAN DAILY TEMP. (MDT) (C) 0.7 0.9 1.2 10.3 13.6 16.6 22.2 21.7 19.1 13.0 4.6 -0.9 10.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 0.0 48.8 32.4 5.7 0.0 0.0 0.0 86.9 HEATING DEG. DAYS(BASE 18 0C) 534.8 478.8 519.6 231.5 135.5 53.0 1.3 0.0 16.8 155.0 400.6 569.9 3096.9 DEWPOINT (MEAN C) -6.4 -4.9 -4.4 3.5 5.5 9.4 12.3 10.4 7.0 6.2 -0.3 -7.2 2.6 MIXING RATIO (G/KG) 2.89 3.16 3.32 5.80 6.77 8.78 10.65 9.38 7.51 6.96 4.46 2.70 6.03 VAPOUR PRESSURE (HPA) 3.98 4.34 4.57 7.95 9.24 11.93 14.47 12.79 10.29 9.55 6.12 3.72 8.25 SATURATION DEF. (HPA) 2.70 2.30 2.24 4.58 6.70 7.77 13.25 14.21 13.50 5.04 2.46 2.24 6.42 RELATIVE HUMIDITY (MEAN %) 62 69 70 67 62 66 56 51 49 70 76 64 64 RELATIVE HUMIDITY (MAX. %) 76 84 85 84 85 86 76 72 71 88 87 74 81 RELATIVE HUMIDITY (MIN. %) 49 55 54 50 38 45 38 33 31 48 61 52 46 RELATIVE HUMIDITY (MEAN% 03UTC) 65 78 81 79 81 83 75 71 69 85 81 70 77 RELATIVE HUMIDITY (MEAN% 09UTC) 54 59 62 55 51 50 46 41 35 57 66 59 53 RELATIVE HUMIDITY (MEAN% 15UTC) 64 63 60 61 49 54 45 37 38 62 74 61 56 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 20.0 17.8 28.3 31.0 65.4 84.0 3.4 7.0 25.1 18.2 31.1 22.1 353.4 DAYS WITH PRECIPITATION >=10 0 0 0 1 2 5 0 0 1 0 1 1 11 DAYS WITH PRECIPITATION >= 5 2 1 2 1 7 8 0 1 2 0 2 2 28 DAYS WITH PRECIPITATION >= 1 5 3 8 6 10 8 2 1 3 5 5 3 59 DAYS WITH PRECIPITATION 10 8 14 13 17 13 5 2 3 12 20 5 122 GREATEST DAILY PRECIPITATION 7.0 8.2 7.7 19.1 13.0 18.0 2.0 7.0 15.8 4.0 11.0 12.6 19.1 DAY 15 6 1 3 17 10 26 23 30 7 29 2 DAY WITH THUNDER STORM 0 0 0 2 10 10 3 3 3 5 0 0 36 DAYS WITH SNOW OR SLEET 8 8 11 0 0 0 0 0 0 0 13 6 46 DAYS WITH DUST 1 0 0 0 0 2 1 0 3 0 0 0 7 WIND DIRECTION (PREVAILING) 270 270 90 90 90 90 90 90 90 270 270 270 90 PREVAILING WIND SPEED(KNOTS) 11.9 10.5 7.5 7.9 8.6 8.4 8.7 9.5 8.9 8.8 8.9 11.7 8.2 PREVAILING WIND PERCENT 39.1 25.4 19.4 22.5 16.1 20.4 34.3 29.0 19.6 15.7 18.3 40.7 15.9 CALMS PERCENT OF WIND 25.0 38.8 57.3 42.5 33.9 47.5 35.1 37.9 54.2 46.8 49.6 23.0 40.9 NO. OF WIND OBSERVATION 248 224 248 240 242 240 248 248 240 248 240 248 2914 VECTOR WIND DIRECTION (MEAN) 270 265 86 120 207 86 87 87 111 212 235 262 222 VECTOR WIND MAGNITUDE(KNOTS) 7.0 4.6 1.6 1.6 1.6 2.4 4.8 4.8 1.9 1.1 2.1 7.3 0.6 WIND STEADINESES (MEAN %) 81.4 73.0 50.0 31.4 25.4 53.3 80.0 84.2 44.2 26.2 47.7 81.1 10.7 WIND SPEED (MEAN KNOTS) 8.6 6.3 3.2 5.1 6.3 4.5 6.0 5.7 4.3 4.2 4.4 9.0 5.6 FASTEST WIND DIRECTION 220 250 300 250 270 270 230 100 250 200 270 240 240 FASTEST WIND SPEED (KNOTS) 29 35 19 35 33 29 23 19 31 23 29 37 37 DAY 14 3 4 15 22 10 30 10 24 19 14 28 DAYS WITH SKY CLEAR (0-2)/8 12 5 8 3 10 11 19 23 23 7 3 14 138 DAYS WITH P.CLOUDY (3-6)/8 13 12 6 10 14 15 10 6 5 14 6 11 122 DAYS WITH CLOUDY (7-8)/8 6 11 17 17 7 4 2 2 2 10 21 6 105 DAYS WITH VISIBILITY =< 2 KM 4 4 4 3 1 4 0 0 0 2 5 1 28 DURATION OF SUNSHINE HOURS 160.6 140.1 127.0 122.4 235.0 247.1 295.8 301.0 286.4 172.6 64.2 178.7 2330.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 860.2 858.3 861.3 860.8 858.7 858.0 859.9 861.3 863.4 863.7 862.0 860.4 860.7 MAX. QFE PRESSURE IN HPA 868.6 865.8 868.0 869.2 867.5 865.5 864.8 866.0 868.0 871.5 868.8 872.0 872.0 DAY-HOUR 23- 9 22- 9 27- 6 5- 6 19- 6 2-21 3- 6 30- 6 7- 6 15-18 12-18 10- 6 MIN. QFE PRESSURE IN HPA 845.3 848.0 855.0 853.8 847.0 851.4 854.8 854.7 858.0 856.0 850.5 845.8 845.3 DAY-HOUR 19-12 6- 9 24-15 11-15 3-15 12-15 9-15 14-15 25-12 1-15 8-15 27-12 MEAN QNH PRESSURE IN HPA 1016.6 1014.5 1017.9 1017.4 1014.9 1014.1 1016.3 1017.9 1020.3 1020.6 1018.7 1016.9 1017.2 MAX. QNH PRESSURE IN HPA 1026.3 1023.1 1025.6 1027.0 1025.0 1022.7 1021.9 1023.3 1025.6 1029.6 1026.5 1030.2 1030.2 DAY-HOUR 23- 9 22- 9 27- 6 5- 6 19- 6 2-21 3- 6 30- 6 7- 6 15-18 12-18 10- 6 MIN. QNH PRESSURE IN HPA 999.6 1002.7 1010.7 1009.3 1001.5 1006.6 1010.5 1010.4 1014.1 1011.8 1005.5 1000.2 999.6 DAY-HOUR 19-12 6- 9 24-15 11-15 3-15 12-15 9-15 14-15 25-12 1-15 8-15 27-12 MEAN QFF PRESSURE IN HPA 1019.9 1017.7 1021.1 1014.8 1009.9 1007.4 1006.4 1008.3 1012.2 1016.7 1019.7 1020.8 1014.6 MAX. QFF PRESSURE IN HPA 1037.0 1026.7 1034.4 1026.5 1022.1 1017.3 1014.2 1014.4 1021.9 1027.2 1029.8 1037.8 1037.8 DAY-HOUR 23-18 11- 6 2-15 5- 6 18- 3 3- 3 2- 6 30- 6 30- 6 15-18 16- 6 11- 6 MIN. QFF PRESSURE IN HPA 1000.0 1004.9 1011.7 1003.8 997.3 998.1 998.4 1000.3 1004.4 1007.5 1002.8 1000.8 997.3 DAY-HOUR 19-12 6- 9 10- 0 11-12 3-15 12-15 9-12 14-18 24-12 23- 0 9- 0 27-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 860.2 858.4 861.3 860.6 858.5 858.0 860.0 861.3 863.4 863.7 861.9 860.2 860.6 MAX. QFE PRESSURE IN HPA 867.4 865.0 867.8 868.0 867.0 865.0 864.0 864.3 867.0 871.0 868.0 871.6 871.6 DAY 24 22 28 5 20 3 3 4 8 15 16 7 MIN. QFE PRESSURE IN HPA 851.0 851.0 855.0 854.0 848.2 853.0 856.0 856.0 859.0 858.0 850.6 850.2 848.2 DAY 20 4 25 11 3 13 10 15 15 1 9 27 MEAN QNH PRESSURE IN HPA 1016.7 1014.5 1017.9 1017.1 1014.7 1014.1 1016.4 1017.9 1020.3 1020.6 1018.6 1016.7 1017.1 MAX. QNH PRESSURE IN HPA 1024.9 1022.2 1025.4 1025.6 1024.4 1022.2 1021.0 1021.4 1024.4 1029.0 1025.6 1029.7 1029.7 DAY 24 22 28 5 20 3 3 4 8 15 16 7 MIN. QNH PRESSURE IN HPA 1006.1 1006.1 1010.7 1009.6 1002.9 1008.4 1011.8 1011.8 1015.3 1014.1 1005.7 1005.2 1002.9 DAY 20 4 25 11 3 13 10 15 15 1 9 27 MEAN QFF PRESSURE IN HPA 1019.2 1017.5 1020.7 1014.3 1009.7 1007.4 1006.3 1008.0 1011.7 1016.2 1019.0 1019.9 1014.2 MAX. QFF PRESSURE IN HPA 1034.3 1024.7 1031.9 1025.1 1019.3 1016.0 1013.3 1012.9 1021.4 1025.9 1027.9 1036.7 1036.7 DAY 24 19 3 5 20 3 3 4 30 16 13 11 MIN. QFF PRESSURE IN HPA 1007.1 1007.5 1011.7 1005.3 998.4 1000.2 999.0 1000.9 1006.3 1007.5 1002.8 1004.1 998.4 DAY 12 4 10 11 4 13 10 15 25 23 9 27 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 860.0 858.1 861.3 860.7 859.1 858.2 860.3 861.6 863.7 863.9 862.0 860.2 860.7 MAX. QFE PRESSURE IN HPA 867.2 865.0 867.2 868.0 866.5 865.0 864.0 864.3 866.8 871.0 868.0 871.2 871.2 DAY 28 22 27 5 18 3 3 30 7 15 16 10 MIN. QFE PRESSURE IN HPA 851.0 848.5 855.0 854.0 849.0 854.0 857.0 856.8 859.5 857.0 851.0 849.5 848.5 DAY 12 6 25 11 4 13 9 15 15 1 9 27 MEAN QNH PRESSURE IN HPA 1016.4 1014.2 1017.9 1017.2 1015.3 1014.4 1016.8 1018.2 1020.7 1020.8 1018.7 1016.6 1017.3 MAX. QNH PRESSURE IN HPA 1024.7 1022.2 1024.7 1025.6 1023.9 1022.2 1021.0 1021.4 1024.2 1029.0 1025.6 1029.2 1029.2 DAY 28 22 27 5 18 3 3 30 7 15 16 10 MIN. QNH PRESSURE IN HPA 1006.1 1003.3 1010.7 1009.6 1003.8 1009.6 1013.0 1012.8 1015.9 1013.0 1006.1 1004.4 1003.3 DAY 12 6 25 11 4 13 9 15 15 1 9 27 MEAN QFF PRESSURE IN HPA 1020.1 1017.9 1021.4 1015.1 1011.1 1008.1 1007.4 1009.3 1013.5 1017.4 1019.9 1021.2 1015.2 MAX. QFF PRESSURE IN HPA 1035.0 1026.3 1031.7 1025.8 1022.1 1017.3 1013.7 1013.6 1021.6 1026.7 1028.4 1036.3 1036.3 DAY 24 11 3 5 18 3 3 30 30 16 16 11 MIN. QFF PRESSURE IN HPA 1007.3 1007.3 1013.9 1006.1 999.6 1000.8 1000.7 1002.8 1007.9 1008.7 1004.9 1004.6 999.6 DAY 19 4 25 11 4 13 10 15 25 23 9 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 860.9 858.9 862.1 861.8 859.6 858.6 860.8 862.3 864.6 864.6 862.6 860.9 861.5 MAX. QFE PRESSURE IN HPA 868.4 865.3 868.0 869.2 867.5 865.0 864.8 866.0 868.0 871.3 868.8 872.0 872.0 DAY 23 22 27 5 19 3 3 30 7 15 16 10 MIN. QFE PRESSURE IN HPA 849.5 848.5 856.5 855.0 849.9 854.8 857.3 857.7 861.0 858.0 851.0 848.8 848.5 DAY 19 6 25 11 4 13 20 15 15 1 9 27 MEAN QNH PRESSURE IN HPA 1017.4 1015.1 1018.8 1018.5 1016.0 1014.8 1017.3 1019.1 1021.7 1021.7 1019.4 1017.4 1018.1 MAX. QNH PRESSURE IN HPA 1026.0 1022.5 1025.6 1027.0 1025.0 1022.2 1021.9 1023.3 1025.6 1029.4 1026.5 1030.2 1030.2 DAY 23 22 27 5 19 3 3 30 7 15 16 10 MIN. QNH PRESSURE IN HPA 1004.4 1003.3 1012.4 1010.7 1004.9 1010.5 1013.3 1013.8 1017.6 1014.1 1006.1 1003.6 1003.3 DAY 19 6 25 11 4 13 20 15 15 1 9 27 MEAN QFF PRESSURE IN HPA 1021.1 1018.8 1022.3 1016.2 1010.7 1008.0 1007.7 1009.5 1013.7 1018.2 1020.7 1022.0 1015.7 MAX. QFF PRESSURE IN HPA 1035.9 1026.7 1030.9 1026.5 1021.2 1015.6 1014.2 1014.4 1021.9 1027.0 1029.8 1037.8 1037.8 DAY 23 11 2 5 17 3 2 30 30 15 16 11 MIN. QFF PRESSURE IN HPA 1004.9 1006.7 1014.3 1006.1 999.9 1002.1 1000.8 1003.2 1007.4 1008.0 1003.5 1003.3 999.9 DAY 19 4 6 11 4 13 9 15 25 23 9 27 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 860.3 858.6 861.7 861.1 858.9 858.0 860.2 861.7 863.8 863.9 862.0 860.5 860.9 MAX. QFE PRESSURE IN HPA 868.6 865.8 868.0 868.0 866.6 864.2 864.5 864.8 868.0 871.3 868.5 871.7 871.7 DAY 23 22 27 5 18 3 3 30 7 15 16 10 MIN. QFE PRESSURE IN HPA 847.8 848.0 857.0 854.5 849.8 854.0 856.4 856.0 859.8 858.0 852.0 847.0 847.0 DAY 19 6 24 11 4 12 9 22 25 1 8 27 MEAN QNH PRESSURE IN HPA 1016.7 1014.8 1018.4 1017.7 1015.1 1014.2 1016.6 1018.3 1020.8 1020.8 1018.7 1017.0 1017.4 MAX. QNH PRESSURE IN HPA 1026.3 1023.1 1025.6 1025.6 1024.0 1021.2 1021.6 1021.9 1025.6 1029.4 1026.2 1029.8 1029.8 DAY 23 22 27 5 18 3 3 30 7 15 16 10 MIN. QNH PRESSURE IN HPA 1002.5 1002.7 1013.0 1010.1 1004.7 1009.6 1012.3 1011.8 1016.2 1014.1 1007.3 1001.5 1001.5 DAY 19 6 24 11 4 12 9 22 25 1 8 27 MEAN QFF PRESSURE IN HPA 1019.4 1017.6 1021.3 1014.8 1009.5 1007.1 1006.5 1008.4 1012.1 1016.6 1019.5 1020.5 1014.4 MAX. QFF PRESSURE IN HPA 1034.7 1024.7 1032.2 1023.9 1021.9 1014.7 1013.5 1013.1 1018.8 1026.6 1029.4 1036.2 1036.2 DAY 23 19 2 5 17 3 3 4 30 15 16 10 MIN. QFF PRESSURE IN HPA 1002.6 1004.9 1014.2 1004.7 1000.5 1000.1 999.4 1000.9 1005.7 1008.7 1004.1 1001.7 999.4 DAY 19 6 6 11 3 12 9 22 25 23 9 27 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 859.8 857.8 860.6 860.3 857.9 857.3 859.1 860.3 862.3 862.7 861.4 859.8 859.9 MAX. QFE PRESSURE IN HPA 868.0 864.0 866.8 866.8 866.0 863.0 863.0 863.5 866.0 870.2 868.0 871.2 871.2 DAY 23 22 16 4 17 2 3 3 7 15 12 10 MIN. QFE PRESSURE IN HPA 845.3 848.0 855.2 854.0 848.5 852.2 855.1 855.0 858.0 856.3 851.0 845.8 845.3 DAY 19 6 24 11 3 12 9 14 25 1 8 27 MEAN QNH PRESSURE IN HPA 1016.2 1013.9 1017.1 1016.7 1014.0 1013.3 1015.4 1016.8 1019.1 1019.5 1018.0 1016.2 1016.3 MAX. QNH PRESSURE IN HPA 1025.6 1021.0 1024.2 1024.2 1023.3 1019.9 1019.9 1020.4 1023.3 1028.1 1025.6 1029.2 1029.2 DAY 23 22 16 4 17 2 3 3 7 15 12 10 MIN. QNH PRESSURE IN HPA 999.6 1002.7 1010.9 1009.6 1003.3 1007.5 1010.8 1010.7 1014.1 1012.2 1006.1 1000.2 999.6 DAY 19 6 24 11 3 12 9 14 25 1 8 27 MEAN QFF PRESSURE IN HPA 1018.8 1016.7 1019.8 1013.7 1008.5 1006.6 1005.2 1006.9 1010.6 1015.0 1018.5 1019.4 1013.3 MAX. QFF PRESSURE IN HPA 1034.4 1024.1 1032.2 1023.1 1021.7 1013.9 1011.7 1011.6 1016.2 1025.1 1028.2 1036.3 1036.3 DAY 23 12 2 4 17 3 3 3 30 15 12 10 MIN. QFF PRESSURE IN HPA 1000.0 1004.9 1012.7 1003.8 998.6 998.9 998.4 1000.3 1004.4 1007.6 1003.0 1000.8 998.4 DAY 19 6 24 11 3 12 9 14 24 4 8 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 860.0 857.9 860.6 860.2 857.8 857.3 858.8 860.1 862.3 862.9 861.6 860.3 860.0 MAX. QFE PRESSURE IN HPA 868.0 864.0 867.0 867.0 866.0 863.9 862.2 863.5 866.0 870.4 867.8 871.2 871.2 DAY 23 22 16 4 17 2 1 3 7 14 12 10 MIN. QFE PRESSURE IN HPA 845.3 850.0 855.0 853.8 847.0 851.4 854.8 854.7 858.0 856.0 850.5 846.0 845.3 DAY 19 6 24 11 3 12 9 14 25 1 8 27 MEAN QNH PRESSURE IN HPA 1016.4 1014.1 1017.1 1016.6 1013.9 1013.3 1015.0 1016.5 1019.1 1019.7 1018.3 1016.7 1016.4 MAX. QNH PRESSURE IN HPA 1025.6 1021.0 1024.4 1024.4 1023.3 1020.9 1018.9 1020.4 1023.3 1028.3 1025.4 1029.2 1029.2 DAY 23 22 16 4 17 2 1 3 7 14 12 10 MIN. QNH PRESSURE IN HPA 999.6 1005.0 1010.7 1009.3 1001.5 1006.6 1010.5 1010.4 1014.1 1011.8 1005.5 1000.4 999.6 DAY 19 6 24 11 3 12 9 14 25 1 8 27 MEAN QFF PRESSURE IN HPA 1020.2 1017.7 1020.5 1014.3 1009.6 1006.9 1005.5 1007.6 1011.9 1016.3 1019.7 1020.8 1014.2 MAX. QFF PRESSURE IN HPA 1035.7 1024.1 1034.4 1023.4 1022.0 1016.0 1011.7 1012.9 1017.2 1025.9 1028.5 1036.5 1036.5 DAY 23 18 2 4 17 2 1 30 29 14 15 10 MIN. QFF PRESSURE IN HPA 1001.5 1008.0 1013.4 1004.7 997.3 998.1 998.6 1000.7 1004.5 1008.1 1003.7 1001.9 997.3 DAY 19 4 9 11 3 12 9 14 24 1 8 27 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 860.4 858.6 861.7 861.0 858.6 858.3 859.8 861.3 863.3 863.8 862.2 860.8 860.8 MAX. QFE PRESSURE IN HPA 868.0 864.6 867.8 868.2 866.8 865.0 863.4 864.9 867.0 871.5 868.8 871.6 871.6 DAY 23 22 16 4 19 2 2 3 7 15 12 6 MIN. QFE PRESSURE IN HPA 847.8 850.9 856.0 854.4 848.0 852.4 855.9 855.4 859.2 857.0 850.5 849.0 847.8 DAY 19 6 9 10 3 12 9 14 14 1 8 27 MEAN QNH PRESSURE IN HPA 1016.9 1014.8 1018.3 1017.6 1014.8 1014.5 1016.2 1017.9 1020.2 1020.8 1019.0 1017.3 1017.3 MAX. QNH PRESSURE IN HPA 1025.6 1021.7 1025.4 1025.8 1024.2 1022.2 1020.3 1022.0 1024.4 1029.6 1026.5 1029.7 1029.7 DAY 23 22 16 4 19 2 2 3 7 15 12 6 MIN. QNH PRESSURE IN HPA 1002.5 1006.0 1011.8 1010.0 1002.7 1007.7 1011.7 1011.2 1015.5 1013.0 1005.5 1003.8 1002.5 DAY 19 6 9 10 3 12 9 14 14 1 8 27 MEAN QFF PRESSURE IN HPA 1020.7 1018.4 1021.8 1015.3 1010.0 1007.6 1006.5 1008.5 1012.3 1017.2 1020.3 1021.7 1015.0 MAX. QFF PRESSURE IN HPA 1037.0 1025.9 1034.3 1025.4 1019.4 1015.7 1013.4 1014.0 1020.6 1027.2 1029.7 1037.0 1037.0 DAY 23 18 2 4 19 2 2 3 29 15 12 10 MIN. QFF PRESSURE IN HPA 1005.2 1008.7 1013.2 1006.4 998.1 999.2 999.2 1000.3 1004.7 1009.8 1003.1 1004.8 998.1 DAY 19 3 9 11 3 12 9 14 24 1 8 27 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 860.3 858.4 861.6 861.0 859.0 858.3 860.2 861.7 863.5 864.0 862.0 860.7 860.9 MAX. QFE PRESSURE IN HPA 867.8 864.5 867.5 868.2 867.0 865.5 864.0 865.0 867.0 871.2 868.2 871.6 871.6 DAY 23 21 27 4 19 2 2 3 7 15 15 6 MIN. QFE PRESSURE IN HPA 849.8 851.0 855.0 854.0 848.5 853.0 856.0 856.0 859.0 858.0 851.0 850.0 848.5 DAY 19 3 24 10 3 12 9 14 30 1 8 27 MEAN QNH PRESSURE IN HPA 1016.8 1014.6 1018.3 1017.5 1015.3 1014.5 1016.7 1018.3 1020.4 1021.0 1018.8 1017.2 1017.5 MAX. QNH PRESSURE IN HPA 1025.4 1021.6 1025.0 1025.8 1024.4 1022.7 1021.0 1022.2 1024.4 1029.2 1025.8 1029.7 1029.7 DAY 23 21 27 4 19 2 2 3 7 15 15 6 MIN. QNH PRESSURE IN HPA 1004.7 1006.1 1010.7 1009.6 1003.3 1008.4 1011.8 1011.8 1015.3 1014.1 1006.1 1005.0 1003.3 DAY 19 3 24 10 3 12 9 14 30 1 8 27 MEAN QFF PRESSURE IN HPA 1019.5 1017.4 1021.1 1014.6 1010.2 1007.3 1006.6 1008.5 1011.8 1016.8 1019.7 1020.9 1014.5 MAX. QFF PRESSURE IN HPA 1034.8 1024.9 1033.9 1024.9 1019.4 1016.0 1013.8 1014.0 1020.6 1026.5 1028.7 1036.8 1036.8 DAY 23 18 2 4 19 2 2 3 29 15 15 10 MIN. QFF PRESSURE IN HPA 1007.7 1007.2 1012.6 1005.5 997.7 998.9 998.4 1000.8 1005.9 1008.1 1002.9 1004.5 997.7 DAY 19 3 9 10 3 12 9 14 24 22 8 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.5 2.5 3.1 8.8 17.1 20.5 22.2 20.9 16.2 6.3 6.6 2.0 10.8 MINIMUN AIR TEMPERATURE (C) -0.4 -1.5 -0.9 2.5 9.8 13.0 14.9 14.6 10.2 3.5 1.7 -0.7 5.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 2 7 7 1 0 0 0 0 0 0 3 7 27 DAYS WITH FREEZING MIN.<= 0 20 19 22 8 0 0 0 0 0 5 10 15 99 TEMPERATURE RECORDS LOWEST(C) -5.0 -6.8 -7.0 -4.6 4.6 10.6 9.4 8.0 4.0 -2.5 -10.6 -10.0 -10.6 DAY 22 7 15 21 6 1 4 30 24 28 29 28 MAXIMUM AIR TEMPERATURE (C) 8.2 8.0 8.2 16.1 24.6 27.4 28.9 27.8 24.1 10.5 12.5 6.0 16.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 8 11 13 4 0 0 0 37 DAYS WITH MAXIMUM TEMP. <= 0 0 3 1 0 0 0 0 0 0 2 0 5 11 TEMPERATURE RECORDS HIGHEST(C) 15.2 17.4 15.0 22.6 30.2 32.5 34.4 35.0 31.6 29.0 18.4 13.0 35.0 DAY 31 3 8 24 9 28 6 3 5 2 6 1 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 9.5 9.1 13.6 14.8 14.4 14.0 13.2 13.9 7.0 10.8 6.7 11.3 MEAN DAILY TEMP. (MDT) (C) 3.9 3.2 3.7 9.3 17.2 20.2 21.9 21.2 17.1 7.0 7.1 2.7 11.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.2 15.6 41.2 45.9 0.1 0.3 0.0 0.0 104.4 HEATING DEG. DAYS(BASE 18 0C) 437.1 413.7 444.7 261.9 36.5 1.4 0.0 15.8 44.4 348.7 326.1 454.9 2785.3 DEWPOINT (MEAN C) -5.9 -3.4 -3.6 -0.6 5.3 8.1 9.7 11.3 6.8 1.9 -3.5 -4.4 1.8 MIXING RATIO (G/KG) 2.92 3.55 3.51 4.44 6.86 8.04 8.96 10.01 7.48 5.20 3.58 3.52 5.67 VAPOUR PRESSURE (HPA) 4.01 4.87 4.79 6.08 9.38 10.96 12.20 13.60 10.23 7.17 4.94 4.83 7.75 SATURATION DEF. (HPA) 4.06 2.84 3.16 6.05 11.12 14.18 15.49 12.33 9.19 3.07 5.44 2.72 7.47 RELATIVE HUMIDITY (MEAN %) 52 68 65 56 52 49 48 57 58 77 54 67 59 RELATIVE HUMIDITY (MAX. %) 65 82 82 79 75 71 65 78 79 88 70 78 76 RELATIVE HUMIDITY (MIN. %) 39 52 47 34 29 29 33 37 38 63 36 56 41 RELATIVE HUMIDITY (MEAN% 03UTC) 61 76 76 73 70 67 62 74 74 85 60 70 71 RELATIVE HUMIDITY (MEAN% 09UTC) 44 60 56 43 36 33 37 43 44 68 42 60 47 RELATIVE HUMIDITY (MEAN% 15UTC) 50 65 56 42 38 37 38 45 47 73 51 67 51 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 0.7 16.0 25.5 27.1 30.6 25.3 0.5 24.8 0.7 59.1 14.2 55.7 280.2 DAYS WITH PRECIPITATION >=10 0 0 0 0 1 1 0 2 0 2 1 2 9 DAYS WITH PRECIPITATION >= 5 0 0 2 4 3 3 0 2 0 4 1 3 22 DAYS WITH PRECIPITATION >= 1 0 5 6 5 5 3 0 2 0 11 2 9 48 DAYS WITH PRECIPITATION 2 11 15 9 9 7 3 6 4 17 2 15 100 GREATEST DAILY PRECIPITATION 0.6 4.0 6.1 7.2 11.1 11.0 0.3 14.0 0.6 14.0 13.0 25.0 25.0 DAY 24 8 27 3 30 15 30 5 14 5 7 26 DAY WITH THUNDER STORM 0 1 2 1 6 6 3 4 1 0 0 0 24 DAYS WITH SNOW OR SLEET 0 10 8 3 0 0 0 0 0 7 1 9 38 DAYS WITH DUST 0 0 1 0 3 7 1 0 3 1 0 0 16 WIND DIRECTION (PREVAILING) 270 270 270 270 225 90 90 90 90 90 270 270 270 PREVAILING WIND SPEED(KNOTS) 12.5 11.4 10.5 12.4 13.2 10.1 8.7 9.4 7.9 6.6 11.7 11.8 11.7 PREVAILING WIND PERCENT 38.7 23.2 22.6 28.8 15.3 21.3 29.4 33.9 35.4 21.8 32.5 37.9 17.2 CALMS PERCENT OF WIND 12.5 30.8 36.7 25.0 39.1 42.1 35.5 37.1 33.8 54.4 29.2 23.4 33.3 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 249 260 241 254 207 81 81 89 96 105 262 260 238 VECTOR WIND MAGNITUDE(KNOTS) 10.4 4.2 3.8 5.5 2.0 3.3 4.4 4.9 3.7 2.1 5.9 7.0 1.8 WIND STEADINESES (MEAN %) 86.0 57.5 60.3 62.5 31.3 55.9 72.1 80.3 66.1 63.6 74.7 79.5 25.7 WIND SPEED (MEAN KNOTS) 12.1 7.3 6.3 8.8 6.4 5.9 6.1 6.1 5.6 3.3 7.9 8.8 7.0 FASTEST WIND DIRECTION 240 240 230 210 230 240 310 330 350 210 240 210 240 FASTEST WIND SPEED (KNOTS) 49 35 35 39 33 29 27 29 29 29 35 31 49 DAY 30 24 6 19 2 2 30 7 27 2 3 22 DAYS WITH SKY CLEAR (0-2)/8 8 5 3 9 7 20 25 19 13 5 13 6 133 DAYS WITH P.CLOUDY (3-6)/8 12 10 10 15 19 8 6 9 14 7 12 9 131 DAYS WITH CLOUDY (7-8)/8 11 13 18 6 5 2 0 3 3 19 5 16 101 DAYS WITH VISIBILITY =< 2 KM 1 10 7 3 1 1 0 0 0 7 4 6 40 DURATION OF SUNSHINE HOURS 160.4 121.9 124.0 225.2 251.9 285.4 341.4 286.9 226.2 111.7 171.8 99.8 2406.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 859.9 859.4 854.8 858.5 859.7 859.2 858.8 858.7 861.7 865.2 863.3 859.3 859.9 MAX. QFE PRESSURE IN HPA 871.2 868.6 865.5 867.6 867.0 864.0 864.5 867.0 866.8 872.0 875.0 873.0 875.0 DAY-HOUR 20-21 1- 0 23- 6 30- 6 13- 6 28- 6 10-21 8- 6 19-18 16- 6 29-18 1- 0 MIN. QFE PRESSURE IN HPA 849.4 846.2 842.0 847.0 852.2 853.5 851.5 851.0 855.0 858.0 850.0 849.4 842.0 DAY-HOUR 6-12 10-12 19- 9 19- 9 23-15 2-12 6-15 18-12 5-12 3-12 6-21 23- 9 MEAN QNH PRESSURE IN HPA 1016.3 1015.7 1010.5 1014.8 1016.1 1015.5 1015.0 1014.9 1018.3 1022.4 1020.2 1015.6 1016.3 MAX. QNH PRESSURE IN HPA 1029.2 1026.3 1022.7 1025.1 1024.4 1021.0 1021.6 1024.4 1024.2 1030.2 1033.6 1031.3 1033.6 DAY-HOUR 20-21 1- 0 23- 6 30- 6 13- 6 28- 6 10-21 8- 6 19-18 16- 6 29-18 1- 0 MIN. QNH PRESSURE IN HPA 1004.3 1000.6 995.8 1001.5 1007.5 1009.0 1006.7 1006.1 1010.7 1014.1 1005.0 1004.3 995.8 DAY-HOUR 6-12 10-12 19- 9 19- 9 23-15 2-12 6-15 18-12 5-12 3-12 6-21 23- 9 MEAN QFF PRESSURE IN HPA 1017.8 1017.7 1011.9 1012.9 1009.3 1006.7 1005.3 1005.7 1012.0 1022.1 1019.9 1017.9 1013.3 MAX. QFF PRESSURE IN HPA 1034.5 1031.0 1026.2 1023.3 1019.8 1013.4 1014.7 1015.5 1023.2 1031.9 1042.0 1037.1 1042.0 DAY-HOUR 20-21 6-18 23- 3 21-18 13- 6 6- 6 11- 3 28- 6 23-18 28- 6 29-18 1- 3 MIN. QFF PRESSURE IN HPA 1005.3 1002.1 995.1 997.7 998.2 997.6 995.8 995.5 1001.0 1006.1 998.9 1002.8 995.1 DAY-HOUR 6-12 10-12 19- 9 19- 9 23-12 2- 9 6-15 18-12 5-18 2-21 6-21 23- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 859.8 859.7 854.6 858.5 859.9 859.2 859.0 858.9 861.9 865.1 863.0 859.7 860.0 MAX. QFE PRESSURE IN HPA 871.2 868.6 865.0 866.0 865.7 863.0 864.5 866.0 866.2 871.1 875.0 873.0 875.0 DAY 21 1 23 30 13 28 11 8 20 16 30 1 MIN. QFE PRESSURE IN HPA 851.2 851.0 844.0 849.0 853.0 855.0 853.5 853.0 857.0 858.5 850.0 850.3 844.0 DAY 24 9 14 20 23 2 8 18 6 4 7 24 MEAN QNH PRESSURE IN HPA 1016.2 1016.1 1010.2 1014.8 1016.4 1015.5 1015.3 1015.2 1018.6 1022.2 1019.9 1016.1 1016.4 MAX. QNH PRESSURE IN HPA 1029.2 1026.3 1022.2 1023.3 1023.0 1019.9 1021.6 1023.3 1023.5 1029.1 1033.6 1031.3 1033.6 DAY 21 1 23 30 13 28 11 8 20 16 30 1 MIN. QNH PRESSURE IN HPA 1006.3 1006.1 998.1 1003.8 1008.4 1010.7 1009.0 1008.4 1013.0 1014.7 1005.0 1005.3 998.1 DAY 24 9 14 20 23 2 8 18 6 4 7 24 MEAN QFF PRESSURE IN HPA 1017.3 1017.6 1011.4 1012.9 1009.4 1006.6 1005.4 1005.6 1011.7 1021.5 1019.0 1018.1 1013.0 MAX. QFF PRESSURE IN HPA 1033.6 1028.6 1023.7 1022.4 1016.2 1011.5 1014.2 1014.9 1021.3 1030.3 1039.3 1035.2 1039.3 DAY 21 7 23 21 13 6 11 28 24 28 30 1 MIN. QFF PRESSURE IN HPA 1005.5 1006.8 1001.6 1000.2 998.9 1000.0 997.6 996.5 1002.3 1006.5 999.3 1005.7 996.5 DAY 24 9 19 19 23 2 7 15 6 3 7 24 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 859.8 859.7 854.8 858.7 860.4 859.7 859.3 859.1 862.0 865.1 863.0 859.4 860.1 MAX. QFE PRESSURE IN HPA 871.0 868.4 865.2 866.0 866.0 863.9 864.5 866.6 866.0 871.1 875.0 872.5 875.0 DAY 21 1 23 30 13 28 11 8 20 16 30 1 MIN. QFE PRESSURE IN HPA 851.5 851.0 845.0 848.4 854.0 854.4 853.5 853.8 857.2 858.0 850.8 850.0 845.0 DAY 24 9 14 19 23 2 8 18 22 4 7 24 MEAN QNH PRESSURE IN HPA 1016.2 1016.0 1010.4 1015.0 1016.8 1016.1 1015.7 1015.4 1018.8 1022.3 1019.9 1015.7 1016.5 MAX. QNH PRESSURE IN HPA 1029.0 1026.0 1022.4 1023.3 1023.3 1020.9 1021.6 1024.0 1023.3 1029.1 1033.6 1030.7 1033.6 DAY 21 1 23 30 13 28 11 8 20 16 30 1 MIN. QNH PRESSURE IN HPA 1006.7 1006.1 999.2 1003.1 1009.6 1010.0 1009.0 1009.3 1013.2 1014.1 1005.9 1005.0 999.2 DAY 24 9 14 19 23 2 8 18 22 4 7 24 MEAN QFF PRESSURE IN HPA 1018.4 1018.6 1012.2 1013.5 1010.5 1007.9 1006.4 1006.8 1013.0 1022.3 1020.2 1018.4 1014.0 MAX. QFF PRESSURE IN HPA 1034.2 1027.6 1026.2 1023.0 1017.7 1013.1 1014.7 1015.3 1022.3 1030.8 1041.7 1037.1 1041.7 DAY 21 14 23 21 13 6 11 28 24 28 30 1 MIN. QFF PRESSURE IN HPA 1006.6 1007.3 1000.4 999.3 1000.2 1000.0 998.0 998.4 1004.6 1009.9 1001.5 1005.9 998.0 DAY 24 9 19 19 23 2 8 15 6 3 7 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 860.6 860.2 855.5 859.3 860.6 860.1 859.7 859.6 862.5 865.9 864.0 860.1 860.7 MAX. QFE PRESSURE IN HPA 871.0 868.2 865.5 867.6 867.0 864.0 864.5 867.0 866.0 872.0 875.0 872.2 875.0 DAY 21 1 23 30 13 28 11 8 20 16 30 1 MIN. QFE PRESSURE IN HPA 852.5 851.0 845.0 849.0 854.0 854.4 854.0 854.0 857.2 859.0 851.8 851.1 845.0 DAY 2 10 14 19 23 2 6 18 22 4 7 23 MEAN QNH PRESSURE IN HPA 1017.1 1016.7 1011.2 1015.6 1017.1 1016.5 1016.1 1016.0 1019.3 1023.2 1021.0 1016.6 1017.2 MAX. QNH PRESSURE IN HPA 1029.0 1025.8 1022.7 1025.1 1024.4 1021.0 1021.6 1024.4 1023.3 1030.2 1033.6 1030.4 1033.6 DAY 21 1 23 30 13 28 11 8 20 16 30 1 MIN. QNH PRESSURE IN HPA 1007.8 1006.1 999.2 1003.8 1009.6 1010.0 1009.6 1009.6 1013.2 1015.3 1007.0 1006.2 999.2 DAY 2 10 14 19 23 2 6 18 22 4 7 23 MEAN QFF PRESSURE IN HPA 1018.9 1018.9 1013.0 1014.1 1010.4 1007.8 1006.3 1007.0 1013.4 1023.2 1021.1 1019.2 1014.4 MAX. QFF PRESSURE IN HPA 1034.2 1029.7 1025.7 1023.1 1019.8 1013.4 1014.0 1015.5 1021.2 1031.9 1041.9 1036.5 1041.9 DAY 21 6 23 6 13 6 11 28 24 28 29 1 MIN. QFF PRESSURE IN HPA 1008.0 1007.6 998.7 1000.9 1000.8 998.8 997.9 998.7 1005.5 1011.2 1003.1 1005.1 997.9 DAY 24 10 19 19 23 2 8 15 22 3 7 23 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 860.2 859.7 855.2 858.5 859.6 859.4 858.9 858.7 861.6 865.3 863.3 859.2 860.0 MAX. QFE PRESSURE IN HPA 870.5 867.0 864.0 866.0 866.5 862.7 863.6 866.7 865.2 872.0 874.0 870.0 874.0 DAY 20 6 22 30 13 28 10 8 23 16 29 1 MIN. QFE PRESSURE IN HPA 850.0 849.0 842.0 847.0 853.0 854.0 852.6 852.5 856.5 859.5 853.0 849.4 842.0 DAY 10 10 19 19 23 2 6 18 22 4 7 23 MEAN QNH PRESSURE IN HPA 1016.7 1016.0 1010.9 1014.7 1016.0 1015.7 1015.1 1015.0 1018.3 1022.5 1020.2 1015.5 1016.4 MAX. QNH PRESSURE IN HPA 1028.5 1024.4 1021.0 1023.3 1023.9 1019.5 1020.5 1024.1 1022.4 1030.2 1032.5 1027.9 1032.5 DAY 20 6 22 30 13 28 10 8 23 16 29 1 MIN. QNH PRESSURE IN HPA 1005.0 1003.8 995.8 1001.5 1008.4 1009.6 1008.0 1007.8 1012.4 1015.9 1008.4 1004.3 995.8 DAY 10 10 19 19 23 2 6 18 22 4 7 23 MEAN QFF PRESSURE IN HPA 1017.7 1017.8 1012.1 1012.4 1008.8 1006.6 1005.1 1005.4 1011.5 1021.9 1019.4 1017.4 1013.0 MAX. QFF PRESSURE IN HPA 1033.7 1029.9 1023.0 1022.3 1018.2 1011.4 1012.6 1014.9 1020.1 1030.8 1038.3 1032.1 1038.3 DAY 20 6 22 6 13 6 10 28 23 28 29 27 MIN. QFF PRESSURE IN HPA 1005.7 1004.9 995.1 997.7 998.3 997.6 996.6 996.7 1003.8 1008.9 1005.1 1002.8 995.1 DAY 10 10 19 19 23 2 6 15 22 3 6 23 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 859.1 858.4 854.0 857.7 858.6 858.3 857.9 857.6 860.5 864.6 862.6 858.5 859.0 MAX. QFE PRESSURE IN HPA 869.5 866.0 863.0 864.5 864.6 862.0 863.2 865.0 864.8 871.0 872.2 868.8 872.2 DAY 20 6 22 30 13 22 10 8 23 16 29 1 MIN. QFE PRESSURE IN HPA 849.4 846.2 842.5 847.0 852.4 853.5 852.0 851.0 855.0 858.0 851.4 849.4 842.5 DAY 6 10 19 19 23 2 6 18 5 3 6 23 MEAN QNH PRESSURE IN HPA 1015.4 1014.6 1009.6 1013.8 1014.9 1014.5 1014.0 1013.7 1017.1 1021.7 1019.4 1014.7 1015.3 MAX. QNH PRESSURE IN HPA 1027.3 1023.3 1019.9 1021.6 1021.7 1018.7 1020.1 1022.2 1021.9 1029.0 1030.4 1026.5 1030.4 DAY 20 6 22 30 13 22 10 8 23 16 29 1 MIN. QNH PRESSURE IN HPA 1004.3 1000.6 996.4 1001.5 1007.7 1009.0 1007.3 1006.1 1010.7 1014.1 1006.6 1004.3 996.4 DAY 6 10 19 19 23 2 6 18 5 3 6 23 MEAN QFF PRESSURE IN HPA 1016.3 1016.0 1010.7 1011.7 1007.9 1005.5 1004.0 1004.1 1010.2 1021.1 1018.4 1016.8 1011.9 MAX. QFF PRESSURE IN HPA 1031.6 1029.1 1021.4 1020.4 1015.7 1010.3 1012.0 1013.6 1019.0 1030.3 1035.2 1030.6 1035.2 DAY 20 6 22 21 13 22 10 28 23 28 29 27 MIN. QFF PRESSURE IN HPA 1005.3 1002.1 997.8 998.2 998.2 998.2 996.0 995.5 1001.7 1007.4 1002.3 1003.3 995.5 DAY 6 10 19 19 23 2 6 18 5 2 6 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 859.5 858.7 854.1 857.6 858.7 858.2 857.6 857.5 860.7 864.8 863.0 859.0 859.1 MAX. QFE PRESSURE IN HPA 870.1 866.0 863.0 863.5 864.0 861.8 863.2 863.5 865.1 871.0 873.0 869.1 873.0 DAY 20 6 22 30 18 22 10 8 23 16 29 1 MIN. QFE PRESSURE IN HPA 849.4 850.6 844.8 847.5 852.2 854.0 851.5 851.0 855.0 859.0 850.5 850.0 844.8 DAY 6 8 19 19 23 9 6 18 5 3 6 23 MEAN QNH PRESSURE IN HPA 1015.8 1015.0 1009.7 1013.6 1014.9 1014.4 1013.7 1013.6 1017.2 1021.9 1019.9 1015.3 1015.4 MAX. QNH PRESSURE IN HPA 1028.0 1023.3 1019.9 1020.4 1021.0 1018.5 1020.1 1020.4 1022.3 1029.0 1031.3 1026.8 1031.3 DAY 20 6 22 30 18 22 10 8 23 16 29 1 MIN. QNH PRESSURE IN HPA 1004.3 1005.7 999.0 1002.1 1007.5 1009.6 1006.7 1006.1 1010.7 1015.3 1005.5 1005.0 999.0 DAY 6 8 19 19 23 9 6 18 5 3 6 23 MEAN QFF PRESSURE IN HPA 1017.9 1017.5 1011.4 1012.0 1008.5 1006.1 1004.3 1004.9 1011.4 1022.0 1020.2 1018.0 1012.9 MAX. QFF PRESSURE IN HPA 1033.4 1030.1 1022.5 1021.6 1015.6 1010.9 1012.7 1013.5 1020.1 1031.6 1039.8 1031.9 1039.8 DAY 20 6 22 21 13 22 10 27 23 28 29 1 MIN. QFF PRESSURE IN HPA 1005.8 1007.1 1001.2 999.0 998.6 1001.5 995.8 996.8 1002.6 1008.4 1001.3 1004.9 995.8 DAY 6 8 19 19 23 2 6 18 5 2 6 23 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 860.1 859.3 855.2 859.1 860.0 859.4 858.8 858.9 861.9 865.5 863.8 859.4 860.1 MAX. QFE PRESSURE IN HPA 871.0 866.5 864.8 865.3 864.8 863.0 864.2 865.0 866.8 871.6 875.0 870.0 875.0 DAY 20 6 22 29 18 27 10 7 19 16 29 1 MIN. QFE PRESSURE IN HPA 850.0 850.6 845.7 849.0 852.4 855.0 852.9 853.2 855.2 860.0 850.7 850.0 845.7 DAY 6 8 13 19 22 2 6 18 5 2 6 23 MEAN QNH PRESSURE IN HPA 1016.5 1015.6 1010.9 1015.3 1016.4 1015.8 1015.1 1015.2 1018.7 1022.8 1020.7 1015.7 1016.6 MAX. QNH PRESSURE IN HPA 1029.0 1023.9 1021.9 1022.5 1021.9 1019.9 1021.2 1022.2 1024.2 1029.7 1033.6 1027.9 1033.6 DAY 20 6 22 29 18 27 10 7 19 16 29 1 MIN. QNH PRESSURE IN HPA 1005.0 1005.7 1000.0 1003.8 1007.7 1010.7 1008.3 1008.6 1010.9 1016.4 1005.8 1005.0 1000.0 DAY 6 8 13 19 22 2 6 18 5 2 6 23 MEAN QFF PRESSURE IN HPA 1018.3 1017.9 1012.7 1013.7 1009.6 1006.9 1005.3 1006.2 1012.7 1022.8 1020.9 1018.3 1013.8 MAX. QFF PRESSURE IN HPA 1034.4 1031.0 1024.9 1023.3 1016.3 1012.1 1014.1 1014.8 1023.2 1031.1 1042.0 1032.3 1042.0 DAY 20 6 22 21 13 5 10 27 23 28 29 1 MIN. QFF PRESSURE IN HPA 1006.5 1006.7 1002.5 1001.8 999.8 1000.0 996.7 998.3 1001.0 1007.8 1000.9 1004.4 996.7 DAY 6 8 19 19 23 2 6 18 5 2 6 23 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 860.1 859.3 855.3 859.1 860.2 859.5 859.2 859.3 862.1 865.4 863.6 859.3 860.2 MAX. QFE PRESSURE IN HPA 871.2 866.3 865.0 866.2 865.8 863.0 864.5 866.0 866.8 871.6 875.0 869.0 875.0 DAY 20 21 22 29 12 27 10 7 19 16 29 1 MIN. QFE PRESSURE IN HPA 850.9 850.6 845.4 849.3 853.0 855.5 853.6 853.8 856.8 859.0 850.0 850.8 845.4 DAY 6 8 13 19 22 2 7 17 5 3 6 23 MEAN QNH PRESSURE IN HPA 1016.5 1015.7 1011.1 1015.4 1016.6 1015.9 1015.5 1015.6 1018.8 1022.7 1020.6 1015.7 1016.7 MAX. QNH PRESSURE IN HPA 1029.2 1023.6 1022.2 1023.5 1023.1 1019.9 1021.6 1023.3 1024.2 1029.7 1033.6 1026.7 1033.6 DAY 20 21 22 29 12 27 10 7 19 16 29 1 MIN. QNH PRESSURE IN HPA 1006.0 1005.7 999.7 1004.2 1008.4 1011.3 1009.1 1009.3 1012.8 1015.3 1005.0 1005.9 999.7 DAY 6 8 13 19 22 2 7 17 5 3 6 23 MEAN QFF PRESSURE IN HPA 1017.5 1017.4 1012.3 1013.1 1009.3 1006.7 1005.4 1006.0 1012.1 1022.2 1019.8 1017.6 1013.3 MAX. QFF PRESSURE IN HPA 1034.5 1029.7 1024.4 1022.8 1017.1 1012.3 1014.1 1015.2 1023.0 1030.7 1040.0 1031.1 1040.0 DAY 20 6 22 20 12 5 10 27 23 26 29 27 MIN. QFF PRESSURE IN HPA 1006.0 1006.5 1002.6 1000.4 998.8 1001.0 997.4 997.9 1001.5 1006.1 998.9 1005.7 997.4 DAY 23 8 18 19 22 1 6 14 5 2 6 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.7 -0.7 4.8 10.0 13.8 19.3 20.8 19.2 16.7 12.0 6.4 2.9 10.3 MINIMUN AIR TEMPERATURE (C) -4.6 -3.9 0.9 4.9 8.1 12.0 14.8 14.5 11.4 7.4 1.8 -1.0 5.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 17 16 1 0 0 0 0 0 0 0 2 6 42 DAYS WITH FREEZING MIN.<= 0 29 24 14 6 0 0 0 0 0 0 10 18 101 TEMPERATURE RECORDS LOWEST(C) -14.8 -9.8 -5.4 -3.4 0.4 9.0 9.2 10.0 7.0 1.6 -5.0 -14.8 -14.8 DAY 20 4 6 6 3 18 28 30 22 24 14 29 MAXIMUM AIR TEMPERATURE (C) 1.5 3.3 10.0 15.9 20.2 26.1 26.6 24.7 22.8 17.9 11.9 7.0 15.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 6 4 3 3 0 0 0 16 DAYS WITH MAXIMUM TEMP. <= 0 12 7 0 0 0 0 0 0 0 0 0 4 23 TEMPERATURE RECORDS HIGHEST(C) 7.2 11.2 17.2 20.0 27.4 32.5 35.2 32.8 32.2 24.2 19.8 16.2 35.2 DAY 31 29 30 16 18 13 13 28 8 26 3 9 DIF. BETWEEN (MAX.-MIN.) (C) 6.1 7.2 9.1 11.0 12.1 14.1 11.8 10.2 11.4 10.5 10.1 8.0 10.2 MEAN DAILY TEMP. (MDT) (C) -1.6 -0.3 5.5 10.4 14.2 19.1 20.7 19.6 17.1 12.6 6.9 3.0 10.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 8.6 19.3 10.0 5.4 0.0 0.0 0.0 43.4 HEATING DEG. DAYS(BASE 18 0C) 606.1 530.2 388.1 228.7 122.4 17.9 2.3 10.1 52.5 166.0 334.1 465.4 2923.8 DEWPOINT (MEAN C) -7.4 -7.6 -3.5 1.8 5.2 8.9 11.6 11.6 7.6 5.4 -3.5 -3.9 2.2 MIXING RATIO (G/KG) 2.68 2.64 3.60 5.40 6.76 8.59 10.29 10.18 7.75 6.69 3.62 3.45 5.97 VAPOUR PRESSURE (HPA) 3.69 3.62 4.92 7.37 9.22 11.66 13.95 13.83 10.61 9.17 4.98 4.73 8.15 SATURATION DEF. (HPA) 1.87 2.46 4.00 5.50 7.53 11.72 11.55 9.09 9.28 5.49 5.11 3.34 6.41 RELATIVE HUMIDITY (MEAN %) 67 62 59 62 61 57 59 64 60 67 53 64 61 RELATIVE HUMIDITY (MAX. %) 76 77 80 84 85 83 81 85 80 86 72 77 81 RELATIVE HUMIDITY (MIN. %) 57 48 39 39 37 30 39 45 39 46 36 50 42 RELATIVE HUMIDITY (MEAN% 03UTC) 69 69 69 76 78 79 77 81 76 81 63 69 74 RELATIVE HUMIDITY (MEAN% 09UTC) 64 53 46 47 42 37 44 50 45 53 40 56 48 RELATIVE HUMIDITY (MEAN% 15UTC) 69 59 51 51 53 40 48 54 50 61 49 65 54 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 16.6 13.7 27.5 64.3 53.6 28.9 11.9 32.8 1.0 17.7 17.4 25.2 310.6 DAYS WITH PRECIPITATION >=10 0 0 0 3 2 0 0 1 0 0 1 1 8 DAYS WITH PRECIPITATION >= 5 1 1 2 4 3 3 1 2 0 1 1 2 21 DAYS WITH PRECIPITATION >= 1 5 5 10 10 11 9 4 4 1 5 2 5 71 DAYS WITH PRECIPITATION 10 12 14 19 13 14 7 8 2 13 5 8 125 GREATEST DAILY PRECIPITATION 7.0 6.2 7.0 18.0 13.0 6.2 7.6 21.5 1.0 8.0 14.3 11.0 21.5 DAY 19 17 21 28 22 29 11 4 1 16 10 27 DAY WITH THUNDER STORM 0 0 0 3 11 17 8 9 2 4 0 0 54 DAYS WITH SNOW OR SLEET 10 10 5 5 1 0 0 0 0 0 2 6 39 DAYS WITH DUST 0 0 0 1 5 0 0 3 0 0 3 0 12 WIND DIRECTION (PREVAILING) 270 270 270 270 90 90 90 90 90 90 270 270 270 PREVAILING WIND SPEED(KNOTS) 11.5 11.9 12.3 11.7 7.4 7.6 9.3 8.7 7.7 7.4 10.9 9.5 11.0 PREVAILING WIND PERCENT 35.5 37.5 31.5 15.0 17.3 13.3 37.9 39.9 37.7 17.7 36.7 43.8 19.9 CALMS PERCENT OF WIND 23.4 23.3 18.5 39.6 38.3 42.1 30.6 30.6 33.5 46.8 23.8 15.8 30.6 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 236 248 240 240 2916 VECTOR WIND DIRECTION (MEAN) 271 260 252 231 193 195 74 88 95 174 253 266 247 VECTOR WIND MAGNITUDE(KNOTS) 6.5 6.6 7.1 2.6 1.4 0.5 5.5 5.0 3.2 1.2 6.4 6.5 1.9 WIND STEADINESES (MEAN %) 73.0 73.3 73.2 44.8 23.3 10.0 87.3 82.0 60.4 25.5 76.2 78.3 27.1 WIND SPEED (MEAN KNOTS) 8.9 9.0 9.7 5.8 6.0 5.0 6.3 6.1 5.3 4.7 8.4 8.3 7.0 FASTEST WIND DIRECTION 240 190 270 210 220 230 50 240 270 280 270 230 240 FASTEST WIND SPEED (KNOTS) 39 35 39 31 39 31 27 25 19 39 31 25 39 DAY 30 24 28 15 1 14 6 29 4 20 8 1 DAYS WITH SKY CLEAR (0-2)/8 6 10 7 6 6 13 12 10 15 9 15 14 123 DAYS WITH P.CLOUDY (3-6)/8 13 9 15 13 21 14 17 14 9 15 11 11 162 DAYS WITH CLOUDY (7-8)/8 12 10 9 11 4 3 2 7 6 7 4 6 81 DAYS WITH VISIBILITY =< 2 KM 3 2 2 2 1 0 0 0 0 2 0 3 15 DURATION OF SUNSHINE HOURS 133.6 158.5 189.9 167.1 261.9 270.9 263.3 212.5 209.2 177.8 176.8 161.5 2383.0 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 859.1 858.2 854.6 858.8 858.7 856.5 857.6 859.2 861.6 863.3 860.8 859.4 859.0 MAX. QFE PRESSURE IN HPA 868.0 869.0 864.9 869.1 866.1 861.9 862.3 866.2 868.3 870.1 870.2 867.5 870.2 DAY-HOUR 9- 6 6- 6 17- 6 8- 6 5- 6 8- 6 27- 6 21- 6 21- 6 16- 9 5-18 21-15 MIN. QFE PRESSURE IN HPA 848.7 841.7 841.0 849.0 848.0 848.2 853.2 849.1 853.8 852.2 851.0 841.5 841.0 DAY-HOUR 31-21 1-18 4-12 30-18 1- 0 15-12 8-15 29-12 8-15 30-12 19-21 25-21 MEAN QNH PRESSURE IN HPA 1015.4 1014.3 1010.2 1015.0 1014.9 1012.4 1013.7 1015.5 1018.2 1020.2 1017.3 1015.8 1015.3 MAX. QNH PRESSURE IN HPA 1025.6 1026.7 1022.0 1026.8 1023.4 1018.6 1019.1 1023.5 1025.9 1028.0 1028.1 1025.0 1028.1 DAY-HOUR 9- 6 6- 6 17- 6 8- 6 5- 6 8- 6 27- 6 21- 6 21- 6 16- 9 5-18 21-15 MIN. QNH PRESSURE IN HPA 1003.5 995.5 994.7 1003.8 1002.7 1002.9 1008.6 1003.9 1009.3 1007.5 1006.1 995.2 994.7 DAY-HOUR 31-21 1-18 4-12 30-18 1- 0 15-12 8-15 29-12 8-15 30-12 19-21 25-21 MEAN QFF PRESSURE IN HPA 1020.2 1018.4 1010.6 1012.4 1009.9 1004.2 1004.5 1007.1 1011.6 1016.3 1017.0 1017.4 1012.5 MAX. QFF PRESSURE IN HPA 1031.3 1034.6 1023.9 1028.6 1022.9 1010.7 1012.7 1016.0 1021.8 1028.9 1028.0 1032.4 1034.6 DAY-HOUR 9- 6 6- 6 17- 6 8- 6 3-18 27- 3 27- 3 21- 6 13- 6 16-15 6- 6 28-18 MIN. QFF PRESSURE IN HPA 1002.8 994.5 992.7 999.1 996.9 993.4 998.6 993.5 998.2 1001.1 1002.7 996.0 992.7 DAY-HOUR 31-21 1-18 3- 9 30-21 1-12 15- 9 15- 0 29-12 9- 0 30-12 19-21 25-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 859.1 858.0 854.1 858.5 858.8 857.0 857.7 859.4 861.7 863.5 860.9 859.3 859.0 MAX. QFE PRESSURE IN HPA 867.6 868.0 864.1 867.0 865.3 860.8 861.7 866.0 866.1 868.5 870.0 865.9 870.0 DAY 10 6 17 9 5 8 27 21 30 16 6 22 MIN. QFE PRESSURE IN HPA 849.0 845.0 842.0 851.8 848.0 852.0 854.5 853.2 854.0 855.8 852.0 841.5 841.5 DAY 31 2 3 23 1 15 15 29 9 30 20 26 MEAN QNH PRESSURE IN HPA 1015.3 1014.1 1009.7 1014.7 1015.0 1012.9 1013.8 1015.7 1018.4 1020.4 1017.5 1015.6 1015.3 MAX. QNH PRESSURE IN HPA 1025.1 1025.6 1021.1 1024.4 1022.5 1017.3 1018.4 1023.3 1023.4 1026.2 1027.9 1023.2 1027.9 DAY 10 6 17 9 5 8 27 21 30 16 6 22 MIN. QNH PRESSURE IN HPA 1003.8 999.2 995.8 1007.0 1002.7 1007.3 1010.1 1008.6 1009.6 1011.6 1007.3 995.2 995.2 DAY 31 2 3 23 1 15 15 29 9 30 20 26 MEAN QFF PRESSURE IN HPA 1020.0 1017.8 1009.8 1011.9 1009.9 1004.6 1004.6 1007.0 1011.2 1015.9 1016.7 1016.7 1012.2 MAX. QFF PRESSURE IN HPA 1029.4 1033.1 1022.2 1024.4 1022.6 1009.7 1011.7 1014.6 1019.7 1026.6 1026.7 1030.3 1033.1 DAY 20 6 24 9 5 1 27 21 25 16 6 29 MIN. QFF PRESSURE IN HPA 1006.7 998.6 993.9 1002.6 997.3 996.6 998.6 997.6 998.2 1005.3 1005.4 996.9 993.9 DAY 31 2 3 23 1 15 15 29 9 20 20 26 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 859.1 858.1 854.5 859.0 858.8 857.1 858.0 859.5 862.0 863.6 861.0 859.4 859.2 MAX. QFE PRESSURE IN HPA 867.2 868.0 864.5 867.1 865.2 861.1 861.7 866.0 867.0 869.1 870.0 865.5 870.0 DAY 10 6 17 8 5 8 27 21 21 16 6 5 MIN. QFE PRESSURE IN HPA 849.2 845.0 841.2 852.7 848.3 851.9 854.8 853.0 855.0 855.0 853.2 842.3 841.2 DAY 31 2 3 30 1 24 15 29 9 30 20 26 MEAN QNH PRESSURE IN HPA 1015.3 1014.2 1010.1 1015.2 1015.1 1013.1 1014.2 1015.9 1018.7 1020.5 1017.6 1015.7 1015.5 MAX. QNH PRESSURE IN HPA 1024.7 1025.6 1021.6 1024.6 1022.4 1017.7 1018.4 1023.3 1024.4 1026.8 1027.9 1022.7 1027.9 DAY 10 6 17 8 5 8 27 21 21 16 6 5 MIN. QNH PRESSURE IN HPA 1004.1 999.2 994.9 1008.1 1003.0 1007.1 1010.5 1008.4 1010.7 1010.7 1008.6 996.2 994.9 DAY 31 2 3 30 1 24 15 29 9 30 20 26 MEAN QFF PRESSURE IN HPA 1020.6 1018.9 1010.8 1013.2 1010.6 1005.2 1005.5 1007.9 1012.6 1017.4 1018.0 1018.2 1013.2 MAX. QFF PRESSURE IN HPA 1030.0 1033.9 1023.1 1026.0 1022.6 1010.7 1012.7 1015.4 1020.1 1027.9 1027.8 1031.3 1033.9 DAY 9 6 24 2 5 27 27 21 25 16 6 29 MIN. QFF PRESSURE IN HPA 1006.2 999.7 993.2 1004.1 997.7 997.2 999.4 998.4 999.5 1006.7 1008.1 998.5 993.2 DAY 31 2 3 23 1 15 15 29 9 30 20 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 859.7 858.8 855.0 859.7 859.1 857.2 858.3 859.9 862.5 864.1 861.7 860.3 859.7 MAX. QFE PRESSURE IN HPA 868.0 869.0 864.9 869.1 866.1 861.9 862.3 866.2 868.3 870.0 870.0 866.5 870.0 DAY 9 6 17 8 5 8 27 21 21 16 6 5 MIN. QFE PRESSURE IN HPA 851.0 846.0 843.0 853.3 849.2 851.2 854.8 853.1 856.0 855.2 853.6 844.6 843.0 DAY 31 2 3 30 1 15 15 29 9 30 28 26 MEAN QNH PRESSURE IN HPA 1016.1 1015.1 1010.7 1016.1 1015.3 1013.3 1014.5 1016.3 1019.3 1021.2 1018.4 1016.7 1016.1 MAX. QNH PRESSURE IN HPA 1025.6 1026.7 1022.0 1026.8 1023.4 1018.6 1019.1 1023.5 1025.9 1027.9 1027.9 1023.9 1027.9 DAY 9 6 17 8 5 8 27 21 21 16 6 5 MIN. QNH PRESSURE IN HPA 1006.1 1000.4 997.0 1008.8 1004.1 1006.3 1010.5 1008.5 1011.8 1010.9 1009.1 998.8 997.0 DAY 31 2 3 30 1 15 15 29 9 30 28 26 MEAN QFF PRESSURE IN HPA 1021.2 1019.5 1011.4 1013.8 1010.5 1005.0 1005.3 1008.1 1013.0 1017.4 1018.3 1018.5 1013.5 MAX. QFF PRESSURE IN HPA 1031.3 1034.6 1023.9 1028.6 1022.5 1009.9 1012.4 1016.0 1021.8 1028.8 1028.0 1031.9 1034.6 DAY 9 6 17 8 4 1 27 21 13 16 6 29 MIN. QFF PRESSURE IN HPA 1007.3 1000.7 995.4 1005.5 998.4 995.8 999.7 998.2 1001.1 1007.2 1008.0 1001.3 995.4 DAY 31 2 3 23 1 15 15 29 9 30 19 26 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 859.3 858.4 854.5 859.2 858.5 856.3 857.7 859.1 861.6 863.1 860.7 859.5 859.0 MAX. QFE PRESSURE IN HPA 867.7 869.0 863.1 869.1 866.1 860.8 861.2 866.0 868.0 870.1 869.3 867.2 870.1 DAY 9 6 17 8 5 8 27 21 21 16 5 21 MIN. QFE PRESSURE IN HPA 849.3 844.2 842.0 852.4 848.0 849.8 854.1 850.8 854.8 853.2 853.4 844.6 842.0 DAY 31 1 3 30 1 15 15 29 4 30 19 26 MEAN QNH PRESSURE IN HPA 1015.6 1014.5 1010.2 1015.5 1014.7 1012.2 1013.7 1015.4 1018.2 1020.0 1017.3 1015.8 1015.3 MAX. QNH PRESSURE IN HPA 1025.2 1026.7 1020.0 1026.8 1023.4 1017.3 1017.8 1023.3 1025.6 1028.0 1027.1 1024.7 1028.0 DAY 9 6 17 8 5 8 27 21 21 16 5 21 MIN. QNH PRESSURE IN HPA 1004.2 998.3 995.8 1007.7 1002.7 1004.7 1009.7 1005.9 1010.5 1008.6 1008.9 998.8 995.8 DAY 31 1 3 30 1 15 15 29 4 30 19 26 MEAN QFF PRESSURE IN HPA 1019.9 1018.2 1010.3 1012.6 1009.4 1003.7 1004.3 1006.8 1011.3 1015.7 1016.4 1016.9 1012.1 MAX. QFF PRESSURE IN HPA 1030.1 1034.0 1021.1 1028.0 1022.2 1009.5 1010.3 1015.6 1019.7 1028.9 1026.6 1030.2 1034.0 DAY 2 6 24 8 5 27 27 21 21 16 6 29 MIN. QFF PRESSURE IN HPA 1004.7 996.8 992.7 1003.4 997.1 993.4 998.8 994.5 1001.2 1004.7 1004.6 1001.0 992.7 DAY 31 1 3 30 1 15 15 29 9 30 19 26 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 858.6 857.8 854.0 858.1 857.7 855.4 856.8 858.3 860.4 862.3 860.0 858.8 858.2 MAX. QFE PRESSURE IN HPA 866.3 867.8 862.6 868.0 865.4 860.0 860.0 864.8 866.1 870.1 868.8 866.7 870.1 DAY 9 6 16 8 5 12 27 21 30 16 5 21 MIN. QFE PRESSURE IN HPA 849.5 843.4 841.0 850.3 848.0 848.2 854.0 849.1 854.0 852.2 853.6 844.5 841.0 DAY 31 1 4 30 1 15 8 29 4 30 19 26 MEAN QNH PRESSURE IN HPA 1014.8 1013.9 1009.5 1014.2 1013.8 1011.1 1012.7 1014.4 1016.9 1019.0 1016.5 1015.1 1014.3 MAX. QNH PRESSURE IN HPA 1023.6 1025.4 1019.4 1025.6 1022.6 1016.4 1016.4 1021.9 1023.4 1028.0 1026.5 1024.1 1028.0 DAY 9 6 16 8 5 12 27 21 30 16 5 21 MIN. QNH PRESSURE IN HPA 1004.4 997.4 994.7 1005.3 1002.7 1002.9 1009.6 1003.9 1009.6 1007.5 1009.1 998.7 994.7 DAY 31 1 4 30 1 15 8 29 4 30 19 26 MEAN QFF PRESSURE IN HPA 1019.2 1017.6 1009.6 1011.3 1008.7 1002.9 1003.5 1005.9 1009.8 1014.5 1015.7 1016.2 1011.2 MAX. QFF PRESSURE IN HPA 1029.6 1032.6 1019.6 1025.8 1021.8 1008.5 1009.3 1014.6 1018.4 1028.5 1025.5 1029.4 1032.6 DAY 2 6 24 8 5 27 27 5 30 16 5 29 MIN. QFF PRESSURE IN HPA 1005.8 996.8 995.3 1000.7 996.9 993.5 999.4 993.5 999.4 1001.1 1005.8 1000.8 993.5 DAY 31 1 3 30 1 15 15 29 8 30 19 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 859.0 858.0 854.4 857.9 858.1 855.5 856.8 858.4 860.8 862.8 860.5 859.3 858.4 MAX. QFE PRESSURE IN HPA 867.4 867.8 862.5 867.4 865.4 860.0 860.0 864.0 866.5 870.1 869.1 867.5 870.1 DAY 9 6 16 8 5 12 26 21 30 16 5 21 MIN. QFE PRESSURE IN HPA 849.0 843.2 841.0 849.3 851.0 849.0 853.2 850.1 853.8 853.3 854.0 845.0 841.0 DAY 31 1 4 30 1 15 8 29 8 30 19 26 MEAN QNH PRESSURE IN HPA 1015.2 1014.1 1010.0 1014.1 1014.2 1011.3 1012.7 1014.6 1017.3 1019.6 1017.0 1015.6 1014.6 MAX. QNH PRESSURE IN HPA 1024.9 1025.4 1019.3 1024.9 1022.6 1016.4 1016.4 1021.0 1023.9 1028.0 1026.8 1025.0 1028.0 DAY 9 6 16 8 5 12 26 21 30 16 5 21 MIN. QNH PRESSURE IN HPA 1003.8 997.2 994.7 1004.2 1006.1 1003.8 1008.6 1005.1 1009.3 1008.8 1009.6 999.2 994.7 DAY 31 1 4 30 1 15 8 29 8 30 19 26 MEAN QFF PRESSURE IN HPA 1020.3 1018.7 1010.7 1011.8 1009.6 1003.5 1003.9 1006.6 1011.2 1016.4 1017.4 1018.1 1012.4 MAX. QFF PRESSURE IN HPA 1030.7 1034.0 1020.8 1025.4 1022.4 1008.4 1010.2 1014.7 1019.3 1028.9 1027.4 1030.2 1034.0 DAY 2 6 23 8 5 26 26 5 30 16 5 29 MIN. QFF PRESSURE IN HPA 1004.7 996.7 996.1 1000.1 1000.8 994.8 1000.3 996.1 1000.5 1004.6 1007.8 1002.5 994.8 DAY 31 1 4 30 27 15 8 29 8 30 19 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 859.4 858.4 855.2 858.9 859.2 856.8 857.8 859.4 861.6 863.4 860.9 859.5 859.2 MAX. QFE PRESSURE IN HPA 868.0 868.0 863.8 868.7 865.5 861.0 861.1 865.0 866.2 870.1 870.2 867.5 870.2 DAY 9 6 16 8 5 8 26 20 29 16 5 21 MIN. QFE PRESSURE IN HPA 849.0 841.7 843.0 849.0 853.0 852.0 854.6 853.0 854.0 854.1 852.2 842.2 841.7 DAY 31 1 4 30 27 14 8 29 8 30 19 25 MEAN QNH PRESSURE IN HPA 1015.7 1014.6 1011.0 1015.2 1015.5 1012.7 1013.9 1015.7 1018.3 1020.4 1017.4 1015.8 1015.5 MAX. QNH PRESSURE IN HPA 1025.6 1025.6 1020.8 1026.4 1022.7 1017.6 1017.7 1022.2 1023.5 1028.0 1028.1 1025.0 1028.1 DAY 9 6 16 8 5 8 26 20 29 16 5 21 MIN. QNH PRESSURE IN HPA 1003.8 995.5 997.0 1003.8 1008.4 1007.3 1010.2 1008.4 1009.6 1009.7 1007.5 996.0 995.5 DAY 31 1 4 30 27 14 8 29 8 30 19 25 MEAN QFF PRESSURE IN HPA 1020.7 1019.0 1011.7 1012.7 1010.6 1004.4 1004.6 1007.6 1011.9 1016.8 1017.4 1017.6 1012.9 MAX. QFF PRESSURE IN HPA 1031.2 1033.6 1022.3 1027.2 1022.9 1008.6 1011.4 1015.3 1020.1 1028.7 1027.9 1032.4 1033.6 DAY 2 6 23 8 3 27 26 5 24 16 5 28 MIN. QFF PRESSURE IN HPA 1003.7 994.5 997.9 999.2 1000.5 996.6 1000.9 998.3 1000.0 1004.8 1004.8 997.5 994.5 DAY 31 1 4 30 27 14 8 28 8 30 19 25 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 859.2 858.3 855.1 858.8 859.5 857.0 858.1 859.7 862.0 863.7 860.8 859.4 859.3 MAX. QFE PRESSURE IN HPA 868.0 868.0 864.1 868.9 865.3 861.1 861.8 866.0 867.6 870.1 870.2 866.5 870.2 DAY 9 5 16 8 4 7 26 20 30 16 5 21 MIN. QFE PRESSURE IN HPA 848.7 844.0 843.2 849.0 853.0 852.0 855.0 853.2 854.0 856.2 851.0 841.5 841.5 DAY 31 1 4 30 27 14 8 28 8 30 19 25 MEAN QNH PRESSURE IN HPA 1015.5 1014.4 1010.8 1015.1 1015.8 1012.9 1014.2 1016.0 1018.8 1020.6 1017.3 1015.7 1015.6 MAX. QNH PRESSURE IN HPA 1025.6 1025.6 1021.1 1026.6 1022.5 1017.7 1018.5 1023.3 1025.1 1028.0 1028.1 1023.9 1028.1 DAY 9 5 16 8 4 7 26 20 30 16 5 21 MIN. QNH PRESSURE IN HPA 1003.5 998.1 997.2 1003.8 1008.4 1007.3 1010.7 1008.6 1009.6 1012.1 1006.1 995.2 995.2 DAY 31 1 4 30 27 14 8 28 8 30 19 25 MEAN QFF PRESSURE IN HPA 1019.8 1018.1 1011.0 1012.1 1010.5 1004.3 1004.6 1007.4 1011.8 1016.4 1016.4 1016.8 1012.4 MAX. QFF PRESSURE IN HPA 1029.9 1033.1 1022.2 1027.4 1021.9 1009.1 1011.3 1015.2 1020.5 1028.4 1027.6 1030.8 1033.1 DAY 2 5 23 8 3 26 26 5 30 16 5 28 MIN. QFF PRESSURE IN HPA 1002.8 996.5 998.5 999.1 1000.3 995.0 1000.0 996.6 998.3 1007.9 1002.7 996.0 995.0 DAY 31 1 2 30 27 14 14 28 8 19 19 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.2 -3.8 5.5 13.1 15.4 20.4 23.8 22.6 17.6 13.3 7.2 2.2 11.0 MINIMUN AIR TEMPERATURE (C) -9.7 -9.5 1.1 6.0 8.0 12.5 17.5 16.1 11.1 8.0 3.6 -2.0 5.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 1 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 31 22 3 0 0 0 0 0 0 0 3 12 71 DAYS WITH FREEZING MIN.<= 0 31 26 11 0 0 0 0 0 0 0 4 25 97 TEMPERATURE RECORDS LOWEST(C) -17.0 -20.0 -7.0 1.2 3.0 6.0 14.6 12.0 4.0 3.0 -8.0 -8.5 -20.0 DAY 30 3 31 30 1 11 31 20 22 22 22 5 MAXIMUM AIR TEMPERATURE (C) -1.6 1.2 11.1 20.3 22.7 27.7 29.9 28.9 24.6 19.2 11.2 7.0 16.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 6 16 15 6 0 0 0 44 DAYS WITH MAXIMUM TEMP. <= 0 23 9 2 0 0 0 0 0 0 0 0 4 38 TEMPERATURE RECORDS HIGHEST(C) 4.0 11.2 17.8 25.4 30.0 32.0 34.0 35.5 35.0 27.4 18.0 13.0 35.5 DAY 19 28 24 17 24 19 30 9 1 5 29 25 DIF. BETWEEN (MAX.-MIN.) (C) 8.1 10.7 10.0 14.3 14.7 15.2 12.4 12.8 13.5 11.2 7.6 9.0 11.6 MEAN DAILY TEMP. (MDT) (C) -5.7 -4.2 6.1 13.2 15.3 20.1 23.7 22.5 17.9 13.6 7.4 2.5 11.0 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.7 13.6 83.3 56.5 17.6 0.0 0.0 0.0 171.7 HEATING DEG. DAYS(BASE 18 0C) 734.2 579.1 369.0 144.9 92.5 7.6 0.0 0.1 57.8 147.0 319.2 479.8 2931.2 DEWPOINT (MEAN C) -9.3 -9.1 -0.0 2.2 4.8 8.5 11.4 11.6 8.7 5.5 1.8 -3.8 2.7 MIXING RATIO (G/KG) 2.25 2.36 4.56 5.31 6.44 8.24 10.04 10.24 8.43 6.70 5.30 3.43 6.11 VAPOUR PRESSURE (HPA) 3.10 3.26 6.24 7.30 8.82 11.23 13.65 13.91 11.50 9.20 7.28 4.72 8.35 SATURATION DEF. (HPA) 1.17 1.69 3.23 8.62 9.68 13.89 16.71 14.48 10.15 7.25 3.26 2.70 7.73 RELATIVE HUMIDITY (MEAN %) 74 69 72 52 54 50 48 53 61 64 71 68 61 RELATIVE HUMIDITY (MAX. %) 82 81 90 78 80 72 64 70 83 80 84 84 79 RELATIVE HUMIDITY (MIN. %) 66 54 49 29 29 28 33 35 37 47 57 50 43 RELATIVE HUMIDITY (MEAN% 03UTC) 79 73 86 72 75 71 63 68 81 76 78 77 75 RELATIVE HUMIDITY (MEAN% 09UTC) 70 65 59 35 34 33 37 40 43 53 63 58 49 RELATIVE HUMIDITY (MEAN% 15UTC) 75 67 61 38 40 38 39 42 46 57 67 64 53 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 20.5 12.4 35.8 13.5 35.0 6.3 0.0 5.0 48.0 89.0 18.2 6.5 290.2 DAYS WITH PRECIPITATION >=10 0 0 1 0 1 0 0 0 3 3 0 0 8 DAYS WITH PRECIPITATION >= 5 1 0 3 1 3 1 0 1 3 4 1 0 18 DAYS WITH PRECIPITATION >= 1 7 4 9 3 7 1 0 1 4 7 6 1 50 DAYS WITH PRECIPITATION 10 8 12 7 10 6 0 4 5 8 9 5 84 GREATEST DAILY PRECIPITATION 5.0 4.0 10.3 6.0 10.0 5.0 0.0 5.0 20.0 34.0 6.0 4.7 34.0 DAY 3 2 29 13 5 10 ** 14 15 29 11 4 DAY WITH THUNDER STORM 0 0 0 4 6 4 1 0 2 0 0 0 17 DAYS WITH SNOW OR SLEET 8 8 7 0 0 0 0 0 0 0 1 4 28 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 1 0 0 1 WIND DIRECTION (PREVAILING) 270 270 270 270 90 90 90 90 90 225 270 270 90 PREVAILING WIND SPEED(KNOTS) 11.0 9.0 7.0 9.5 5.9 7.4 7.4 7.5 6.9 13.4 9.1 9.8 6.6 PREVAILING WIND PERCENT 39.4 44.9 18.5 17.5 13.3 25.0 37.9 26.2 29.2 17.7 23.8 27.8 15.7 CALMS PERCENT OF WIND 27.1 26.3 40.7 42.1 40.3 35.8 23.4 39.1 46.3 39.1 37.5 41.9 37.1 NO. OF WIND OBSERVATION 155 198 248 240 248 240 248 248 240 248 240 248 2801 VECTOR WIND DIRECTION (MEAN) 269 276 247 245 221 82 79 86 99 233 239 250 238 VECTOR WIND MAGNITUDE(KNOTS) 5.8 5.0 1.2 0.6 1.1 3.2 5.2 3.7 2.7 2.8 5.2 4.3 0.9 WIND STEADINESES (MEAN %) 81.7 82.0 32.4 13.3 22.0 66.7 88.1 80.4 75.0 54.9 80.0 79.6 17.3 WIND SPEED (MEAN KNOTS) 7.1 6.1 3.7 4.5 5.0 4.8 5.9 4.6 3.6 5.1 6.5 5.4 5.2 FASTEST WIND DIRECTION 250 280 290 240 250 350 20 40 100 230 210 240 210 FASTEST WIND SPEED (KNOTS) 23 21 29 27 31 19 21 19 17 29 33 29 33 DAY 5 23 27 15 7 8 16 10 14 4 30 10 DAYS WITH SKY CLEAR (0-2)/8 15 18 5 8 10 19 19 20 20 13 9 11 167 DAYS WITH P.CLOUDY (3-6)/8 9 5 12 17 17 10 11 9 8 9 8 10 125 DAYS WITH CLOUDY (7-8)/8 7 5 14 5 4 1 1 2 2 9 13 10 73 DAYS WITH VISIBILITY =< 2 KM 4 4 4 0 1 0 0 0 1 0 3 3 20 DURATION OF SUNSHINE HOURS 178.1 192.9 144.2 252.6 269.5 327.8 305.0 277.6 248.3 183.1 121.8 143.2 2644.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 861.6 863.0 858.5 862.4 861.2 859.2 859.7 859.5 861.0 863.6 862.2 860.6 861.0 MAX. QFE PRESSURE IN HPA 870.2 871.2 864.8 867.4 867.5 864.0 865.0 866.4 871.4 871.6 868.7 867.2 871.6 DAY-HOUR 22- 6 4- 6 11-18 20- 6 20- 6 6- 6 9-21 19- 6 22- 6 24- 6 8- 6 20- 6 MIN. QFE PRESSURE IN HPA 852.8 852.8 849.0 856.0 852.2 852.1 852.4 851.6 852.9 854.8 855.3 854.6 849.0 DAY-HOUR 1-12 23- 3 29- 9 13-12 6-12 10-12 5-15 1-15 13-15 2-12 27-15 8-12 MEAN QNH PRESSURE IN HPA 1018.2 1019.8 1014.8 1019.1 1017.8 1015.5 1016.0 1015.8 1017.6 1020.6 1018.9 1017.1 1017.6 MAX. QNH PRESSURE IN HPA 1028.1 1029.2 1021.9 1024.9 1025.0 1021.0 1022.2 1023.8 1029.5 1029.7 1026.4 1024.7 1029.7 DAY-HOUR 22- 6 4- 6 11-18 20- 6 20- 6 6- 6 9-21 19- 6 22- 6 24- 6 8- 6 20- 6 MIN. QNH PRESSURE IN HPA 1008.2 1008.2 1003.8 1011.8 1007.5 1007.4 1007.7 1006.8 1008.3 1010.5 1011.0 1010.2 1003.8 DAY-HOUR 1-12 23- 3 29- 9 13-12 6-12 10-12 5-15 1-15 13-15 2-12 27-15 8-12 MEAN QFF PRESSURE IN HPA ****** 1025.6 1014.8 1014.8 1012.1 1006.8 1005.3 1005.7 1010.4 1016.0 1018.0 1019.3 ****** MAX. QFF PRESSURE IN HPA ****** 1041.4 1025.6 1022.4 1021.4 1013.9 1012.8 1016.9 1028.0 1029.9 1030.1 1027.1 ****** DAY-HOUR **-** 3- 3 11-18 5- 3 1- 3 6- 3 10- 9 19- 3 22- 6 24- 6 21-18 20- 6 MIN. QFF PRESSURE IN HPA ****** 1010.3 1002.3 1006.4 1000.7 998.9 996.5 995.9 999.7 1001.2 1007.3 1010.1 ****** DAY-HOUR **-** 23- 0 27- 9 17-15 6-12 23-12 31-21 1-12 1-15 2-12 27-15 11- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** 862.0 858.7 862.5 861.8 859.8 860.2 859.8 861.6 863.7 862.3 860.6 ****** MAX. QFE PRESSURE IN HPA ****** 868.2 863.8 867.0 866.6 863.3 864.8 866.3 870.0 870.6 868.2 866.3 ****** DAY ** 25 12 20 21 6 10 19 22 23 8 20 MIN. QFE PRESSURE IN HPA ****** 853.2 850.3 856.9 853.0 853.9 855.1 853.2 856.5 855.0 857.0 855.1 ****** DAY ** 23 29 15 7 10 6 1 14 2 28 13 MEAN QNH PRESSURE IN HPA ****** 1018.7 1014.9 1019.3 1018.5 1016.3 1016.6 1016.2 1018.3 1020.7 1019.1 1017.1 ****** MAX. QNH PRESSURE IN HPA ****** 1025.8 1020.8 1024.4 1024.0 1020.2 1021.9 1023.6 1027.9 1028.6 1025.8 1023.6 ****** DAY ** 25 12 20 21 6 10 19 22 23 8 20 MIN. QNH PRESSURE IN HPA ****** 1008.6 1005.3 1012.9 1008.4 1009.4 1010.8 1008.6 1012.4 1010.7 1013.0 1010.8 ****** DAY ** 23 29 15 7 10 6 1 14 2 28 13 MEAN QFF PRESSURE IN HPA ****** 1024.2 1014.6 1014.8 1012.6 1007.4 1005.8 1005.9 1010.6 1015.6 1017.8 1018.9 ****** MAX. QFF PRESSURE IN HPA ****** 1033.3 1023.8 1021.6 1020.3 1013.4 1011.9 1016.6 1025.9 1028.7 1029.6 1025.7 ****** DAY ** 25 12 30 1 13 11 19 22 24 22 28 MIN. QFF PRESSURE IN HPA ****** 1010.3 1002.8 1006.5 1003.4 1001.7 1000.1 996.1 1002.9 1001.6 1007.8 1010.6 ****** DAY ** 23 27 18 7 10 6 1 13 2 30 11 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 861.7 863.3 858.7 862.7 862.1 860.2 860.6 860.3 861.9 864.0 862.3 860.7 861.5 MAX. QFE PRESSURE IN HPA 869.1 870.7 863.5 867.0 866.9 863.9 864.8 866.3 870.8 870.6 868.2 867.0 870.8 DAY 22 4 12 20 20 6 10 19 22 23 8 20 MIN. QFE PRESSURE IN HPA 854.1 852.8 850.3 857.2 853.5 855.0 855.6 853.9 856.4 855.2 856.7 855.1 850.3 DAY 1 23 29 15 7 10 6 1 13 2 30 13 MEAN QNH PRESSURE IN HPA 1018.4 1020.2 1014.9 1019.5 1018.8 1016.6 1017.1 1016.8 1018.6 1021.0 1019.1 1017.2 1018.2 MAX. QNH PRESSURE IN HPA 1026.8 1028.7 1020.4 1024.4 1024.3 1020.9 1021.9 1023.6 1028.8 1028.6 1025.8 1024.4 1028.8 DAY 22 4 12 20 20 6 10 19 22 23 8 20 MIN. QNH PRESSURE IN HPA 1009.7 1008.2 1005.3 1013.2 1009.0 1010.7 1011.4 1009.4 1012.3 1010.9 1012.6 1010.8 1005.3 DAY 1 23 29 15 7 10 6 1 13 2 30 13 MEAN QFF PRESSURE IN HPA 1026.5 1027.7 1015.3 1015.9 1013.6 1008.5 1006.9 1007.3 1011.9 1016.8 1018.6 1019.8 1015.7 MAX. QFF PRESSURE IN HPA 1036.2 1041.4 1023.8 1022.4 1021.4 1013.9 1012.4 1016.9 1027.7 1028.9 1027.4 1026.1 1041.4 DAY 30 3 12 5 1 6 11 19 22 24 22 28 MIN. QFF PRESSURE IN HPA 1016.7 1011.5 1003.8 1008.1 1004.3 1003.2 1001.2 998.2 1003.5 1002.7 1007.6 1010.1 998.2 DAY 2 23 27 18 6 10 6 1 13 2 30 11 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 862.6 864.0 859.2 863.0 862.1 860.1 860.7 860.4 862.1 864.5 863.0 861.3 861.9 MAX. QFE PRESSURE IN HPA 870.2 871.2 864.0 867.4 867.5 864.0 864.9 866.4 871.4 871.6 868.7 867.2 871.6 DAY 22 4 7 20 20 6 10 19 22 24 8 20 MIN. QFE PRESSURE IN HPA 854.8 854.2 849.1 857.7 853.2 854.5 855.7 853.7 857.4 855.2 856.8 855.9 849.1 DAY 1 23 29 15 7 10 6 1 13 2 18 8 MEAN QNH PRESSURE IN HPA 1019.3 1021.0 1015.5 1019.9 1018.8 1016.5 1017.2 1016.9 1018.8 1021.5 1019.8 1018.0 1018.6 MAX. QNH PRESSURE IN HPA 1028.1 1029.2 1021.0 1024.9 1025.0 1021.0 1022.0 1023.8 1029.5 1029.7 1026.4 1024.7 1029.7 DAY 22 4 7 20 20 6 10 19 22 24 8 20 MIN. QNH PRESSURE IN HPA 1010.5 1009.8 1003.9 1013.8 1008.6 1010.1 1011.5 1009.2 1013.5 1010.9 1012.8 1011.7 1003.9 DAY 1 23 29 15 7 10 6 1 13 2 18 8 MEAN QFF PRESSURE IN HPA ****** 1026.1 1015.9 1015.6 1013.2 1007.8 1006.7 1006.9 1012.0 1017.3 1019.2 1020.7 ****** MAX. QFF PRESSURE IN HPA ****** 1034.8 1023.7 1021.2 1019.8 1013.2 1012.8 1016.5 1028.0 1029.9 1027.5 1027.1 ****** DAY ** 25 12 2 1 6 10 19 22 24 22 20 MIN. QFF PRESSURE IN HPA ****** 1013.1 1004.0 1007.7 1003.7 1001.8 1000.8 997.8 1003.7 1002.3 1007.9 1011.2 ****** DAY ** 23 27 15 7 10 31 1 1 2 30 11 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 861.7 863.5 858.6 862.3 861.0 858.9 859.7 859.3 860.8 863.5 862.2 860.6 861.0 MAX. QFE PRESSURE IN HPA 869.8 869.5 863.4 866.5 866.4 863.0 864.7 865.4 870.7 870.8 868.1 866.1 870.8 DAY 22 3 12 20 20 6 10 18 22 23 8 18 MIN. QFE PRESSURE IN HPA 854.1 855.0 849.0 857.2 853.9 853.7 854.4 853.1 855.3 855.2 855.4 855.5 849.0 DAY 1 23 29 14 7 10 6 1 13 2 18 8 MEAN QNH PRESSURE IN HPA 1018.3 1020.4 1014.9 1019.0 1017.6 1015.2 1016.0 1015.7 1017.4 1020.4 1019.0 1017.1 1017.6 MAX. QNH PRESSURE IN HPA 1027.6 1027.3 1020.3 1023.9 1023.8 1019.9 1021.8 1022.6 1028.7 1028.8 1025.7 1023.4 1028.8 DAY 22 3 12 20 20 6 10 18 22 23 8 18 MIN. QNH PRESSURE IN HPA 1009.7 1010.7 1003.8 1013.2 1009.4 1009.2 1010.0 1008.5 1011.0 1010.9 1011.2 1011.3 1003.8 DAY 1 23 29 14 7 10 6 1 13 2 18 8 MEAN QFF PRESSURE IN HPA ****** 1024.6 1014.6 1014.3 1011.4 1006.1 1005.1 1005.2 1009.7 1015.4 1017.7 1018.9 ****** MAX. QFF PRESSURE IN HPA ****** 1033.2 1023.7 1019.9 1018.4 1012.2 1012.8 1015.2 1026.7 1028.7 1025.9 1026.0 ****** DAY ** 25 11 2 20 6 10 18 22 23 8 2 MIN. QFF PRESSURE IN HPA ****** 1012.9 1002.3 1007.5 1004.5 999.7 998.5 996.9 1001.1 1001.7 1007.9 1010.9 ****** DAY ** 23 27 15 7 23 31 1 1 2 30 11 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 860.8 862.6 857.7 861.2 859.9 857.7 858.3 858.1 859.4 862.4 861.5 859.7 859.9 MAX. QFE PRESSURE IN HPA 868.7 868.3 863.2 864.8 865.0 861.8 863.3 864.7 869.6 870.0 867.2 865.2 870.0 DAY 21 3 11 4 20 6 10 18 22 23 7 18 MIN. QFE PRESSURE IN HPA 852.8 854.7 849.2 856.0 852.2 852.1 852.9 852.1 853.4 854.8 855.5 854.6 849.2 DAY 1 1 29 13 6 10 6 1 13 2 18 8 MEAN QNH PRESSURE IN HPA 1017.3 1019.4 1013.8 1017.8 1016.3 1013.7 1014.5 1014.2 1015.7 1019.2 1018.2 1016.1 1016.3 MAX. QNH PRESSURE IN HPA 1026.4 1025.9 1020.1 1021.9 1022.2 1018.5 1020.2 1021.8 1027.4 1027.9 1024.7 1022.4 1027.9 DAY 21 3 11 4 20 6 10 18 22 23 7 18 MIN. QNH PRESSURE IN HPA 1008.2 1010.4 1004.1 1011.8 1007.5 1007.4 1008.3 1007.4 1008.9 1010.5 1011.3 1010.2 1004.1 DAY 1 1 29 13 6 10 6 1 13 2 18 8 MEAN QFF PRESSURE IN HPA ****** 1023.1 1013.5 1013.3 1010.3 1004.9 1003.5 1003.8 1008.1 1014.2 1016.8 1017.8 ****** MAX. QFF PRESSURE IN HPA ****** 1030.8 1023.7 1020.0 1017.4 1010.9 1011.2 1014.3 1025.2 1027.8 1025.8 1025.6 ****** DAY ** 24 11 4 14 12 10 18 22 23 21 2 MIN. QFF PRESSURE IN HPA ****** 1014.2 1002.4 1006.5 1000.7 998.9 997.1 995.9 999.9 1001.2 1007.6 1010.1 ****** DAY ** 22 27 17 6 23 31 1 12 2 27 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 861.2 863.1 857.8 861.3 859.8 857.7 858.1 858.1 859.7 863.0 861.8 860.4 860.2 MAX. QFE PRESSURE IN HPA 869.2 869.1 864.0 865.4 865.4 861.2 863.6 864.5 869.6 870.0 868.0 866.0 870.0 DAY 21 5 11 4 20 6 10 18 22 23 7 18 MIN. QFE PRESSURE IN HPA 853.2 855.4 849.9 856.4 854.0 852.2 852.4 851.6 852.9 855.1 855.3 854.9 849.9 DAY 1 22 15 17 6 9 5 1 13 2 27 8 MEAN QNH PRESSURE IN HPA 1017.7 1020.0 1013.9 1017.9 1016.3 1013.8 1014.3 1014.3 1016.0 1019.8 1018.5 1016.9 1016.6 MAX. QNH PRESSURE IN HPA 1027.0 1026.8 1021.0 1022.6 1022.6 1017.8 1020.5 1021.6 1027.4 1027.9 1025.6 1023.3 1027.9 DAY 21 5 11 4 20 6 10 18 22 23 7 18 MIN. QNH PRESSURE IN HPA 1008.6 1011.2 1004.9 1012.3 1009.6 1007.5 1007.7 1006.8 1008.3 1010.8 1011.0 1010.6 1004.9 DAY 1 22 15 17 6 9 5 1 13 2 27 8 MEAN QFF PRESSURE IN HPA 1025.8 1027.3 1014.2 1014.2 1010.9 1005.6 1003.9 1004.7 1009.4 1015.7 1018.0 1019.5 1014.1 MAX. QFF PRESSURE IN HPA 1035.0 1039.7 1024.9 1021.7 1018.6 1010.5 1011.6 1014.5 1025.7 1028.2 1029.3 1026.5 1039.7 DAY 29 3 11 4 20 12 10 18 22 23 21 27 MIN. QFF PRESSURE IN HPA 1014.4 1014.6 1003.3 1006.4 1002.5 999.8 997.2 996.2 999.7 1002.5 1007.3 1010.6 996.2 DAY 1 22 27 17 30 23 5 1 1 2 27 11 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** 862.4 858.9 862.9 861.5 859.4 859.6 859.8 861.2 864.1 862.3 860.8 ****** MAX. QFE PRESSURE IN HPA ****** 868.1 864.8 867.0 866.6 863.1 864.5 866.3 870.2 871.1 868.2 866.1 ****** DAY ** 24 11 9 20 5 9 18 22 23 7 18 MIN. QFE PRESSURE IN HPA ****** 855.2 851.3 858.0 854.5 853.0 853.6 853.7 855.6 855.6 856.3 856.2 ****** DAY ** 22 29 14 6 9 31 1 13 1 27 10 MEAN QNH PRESSURE IN HPA ****** 1019.2 1015.1 1019.7 1018.1 1015.7 1016.0 1016.2 1017.8 1021.1 1019.0 1017.4 ****** MAX. QNH PRESSURE IN HPA ****** 1025.7 1021.9 1024.4 1024.0 1020.0 1021.6 1023.6 1028.1 1029.1 1025.8 1023.4 ****** DAY ** 24 11 9 20 5 9 18 22 23 7 18 MIN. QNH PRESSURE IN HPA ****** 1010.9 1006.5 1014.1 1010.1 1008.4 1009.1 1009.2 1011.4 1011.4 1012.2 1012.1 ****** DAY ** 22 29 14 6 9 31 1 13 1 27 10 MEAN QFF PRESSURE IN HPA ****** 1025.7 1015.5 1015.3 1012.4 1006.8 1005.3 1006.2 1011.0 1016.9 1018.4 1020.2 ****** MAX. QFF PRESSURE IN HPA ****** 1035.9 1025.6 1021.1 1018.9 1012.2 1012.8 1016.8 1026.3 1029.2 1030.1 1026.9 ****** DAY ** 24 11 4 20 12 10 18 22 23 21 27 MIN. QFF PRESSURE IN HPA ****** 1014.7 1004.8 1007.7 1004.2 1000.0 997.0 998.5 1001.4 1003.1 1008.6 1010.8 ****** DAY ** 22 26 17 6 9 31 1 1 2 27 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** 862.1 858.9 863.1 861.9 859.9 860.1 860.1 861.7 864.2 862.2 860.7 ****** MAX. QFE PRESSURE IN HPA ****** 868.1 864.4 867.1 866.6 863.4 865.0 866.3 870.0 871.1 868.2 865.8 ****** DAY ** 24 11 19 19 6 9 18 21 23 7 19 MIN. QFE PRESSURE IN HPA ****** 854.0 850.9 857.6 853.0 853.6 853.5 854.4 856.7 855.6 856.5 855.7 ****** DAY ** 22 28 14 6 9 31 1 13 1 27 12 MEAN QNH PRESSURE IN HPA ****** 1018.9 1015.2 1019.9 1018.6 1016.3 1016.5 1016.5 1018.4 1021.2 1018.9 1017.2 ****** MAX. QNH PRESSURE IN HPA ****** 1025.7 1021.5 1024.6 1024.0 1020.3 1022.2 1023.6 1027.9 1029.1 1025.8 1023.1 ****** DAY ** 24 11 19 19 6 9 18 21 23 7 19 MIN. QNH PRESSURE IN HPA ****** 1009.6 1006.0 1013.7 1008.4 1009.1 1009.0 1010.0 1012.6 1011.4 1012.4 1011.5 ****** DAY ** 22 28 14 6 9 31 1 13 1 27 12 MEAN QFF PRESSURE IN HPA ****** 1024.2 1015.0 1015.1 1012.3 1007.0 1005.5 1006.0 1010.7 1016.4 1017.6 1019.1 ****** MAX. QFF PRESSURE IN HPA ****** 1034.2 1024.6 1020.7 1019.1 1012.3 1012.5 1016.8 1025.7 1029.2 1029.3 1026.3 ****** DAY ** 24 11 19 12 6 10 18 21 23 21 27 MIN. QFF PRESSURE IN HPA ****** 1011.9 1004.1 1007.4 1002.3 1000.4 996.5 998.9 1002.2 1002.6 1007.6 1011.0 ****** DAY ** 22 26 17 6 9 31 1 1 1 27 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.4 -1.9 3.4 8.4 13.7 20.4 21.9 20.3 19.2 12.2 9.4 1.3 10.3 MINIMUN AIR TEMPERATURE (C) -8.3 -5.7 -1.4 3.3 7.3 12.5 15.1 14.8 11.3 6.5 3.8 -3.1 4.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 26 18 7 3 0 0 0 0 0 0 2 14 70 DAYS WITH FREEZING MIN.<= 0 31 24 19 4 0 0 0 0 0 2 8 19 107 TEMPERATURE RECORDS LOWEST(C) -18.0 -18.2 -12.4 -11.0 1.0 9.0 9.0 11.6 6.0 -1.0 -4.0 -18.0 -18.2 DAY 9 5 18 4 4 18 7 3 22 15 14 27 MAXIMUM AIR TEMPERATURE (C) -0.1 2.7 8.7 14.1 19.8 27.9 27.9 25.8 26.8 18.6 16.0 6.0 16.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 10 12 1 8 0 0 0 31 DAYS WITH MAXIMUM TEMP. <= 0 18 12 3 1 0 0 0 0 0 0 0 8 42 TEMPERATURE RECORDS HIGHEST(C) 5.2 10.7 15.8 26.0 27.0 34.2 33.0 30.0 32.5 26.2 22.5 17.0 34.2 DAY 4 17 23 27 29 3 22 24 13 11 3 2 DIF. BETWEEN (MAX.-MIN.) (C) 8.2 8.4 10.1 10.8 12.5 15.4 12.8 11.0 15.5 12.1 12.2 9.1 11.5 MEAN DAILY TEMP. (MDT) (C) -4.2 -1.5 3.7 8.7 13.5 20.2 21.5 20.3 19.1 12.6 9.9 1.5 10.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 15.7 45.2 11.1 6.1 0.0 0.0 0.0 78.2 HEATING DEG. DAYS(BASE 18 0C) 687.8 546.6 429.8 280.1 141.1 1.5 5.4 7.2 10.3 168.1 243.4 512.9 3034.2 DEWPOINT (MEAN C) -8.5 -5.3 -2.6 1.9 4.3 8.2 10.4 12.1 8.7 5.1 -1.3 -4.6 2.4 MIXING RATIO (G/KG) 2.51 3.09 3.81 5.28 6.45 8.21 9.49 10.43 8.39 6.50 4.17 3.36 5.97 VAPOUR PRESSURE (HPA) 3.46 4.25 5.25 7.22 8.83 11.18 12.90 14.19 11.45 8.93 5.75 4.63 8.17 SATURATION DEF. (HPA) 1.20 1.42 3.08 4.75 7.68 13.95 14.46 10.29 11.86 6.00 6.70 2.87 7.02 RELATIVE HUMIDITY (MEAN %) 75 79 69 68 60 50 50 61 55 66 51 69 63 RELATIVE HUMIDITY (MAX. %) 88 89 88 89 85 76 68 77 75 85 68 82 81 RELATIVE HUMIDITY (MIN. %) 61 64 49 44 38 28 35 45 36 45 33 53 44 RELATIVE HUMIDITY (MEAN% 03UTC) 80 85 80 82 78 71 64 75 72 81 62 74 75 RELATIVE HUMIDITY (MEAN% 09UTC) 68 73 56 55 44 32 39 51 41 50 38 58 50 RELATIVE HUMIDITY (MEAN% 15UTC) 73 78 60 57 46 36 41 51 42 58 45 67 55 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 35.5 10.7 34.4 60.5 27.1 4.3 0.0 0.0 0.0 27.9 3.0 22.9 226.3 DAYS WITH PRECIPITATION >=10 1 0 1 2 0 0 0 0 0 1 0 1 6 DAYS WITH PRECIPITATION >= 5 3 0 3 6 2 0 0 0 0 3 0 2 19 DAYS WITH PRECIPITATION >= 1 6 5 5 10 7 1 0 0 0 5 2 3 44 DAYS WITH PRECIPITATION 10 9 13 15 10 3 4 1 0 7 4 8 84 GREATEST DAILY PRECIPITATION 10.0 3.1 12.9 14.0 9.0 4.0 0.0 0.0 0.0 10.0 2.0 11.0 14.0 DAY 6 2 6 29 13 17 ** ** ** 14 13 22 DAY WITH THUNDER STORM 0 0 0 3 4 5 0 0 0 0 0 0 12 DAYS WITH SNOW OR SLEET 10 8 8 3 0 0 0 0 0 2 1 8 40 DAYS WITH DUST 0 0 1 0 2 1 1 0 1 0 0 0 6 WIND DIRECTION (PREVAILING) 270 270 270 270 135 90 90 90 90 90 270 270 270 PREVAILING WIND SPEED(KNOTS) 10.1 9.9 8.5 8.1 5.6 6.0 7.3 6.5 6.8 5.9 7.3 9.2 8.8 PREVAILING WIND PERCENT 31.9 29.0 25.4 14.6 12.9 20.4 30.2 37.5 20.4 10.5 28.3 28.2 15.0 CALMS PERCENT OF WIND 43.5 44.2 40.3 48.8 51.2 42.9 36.3 30.2 40.8 55.6 38.8 45.2 43.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 274 259 273 247 181 86 78 83 92 203 255 263 245 VECTOR WIND MAGNITUDE(KNOTS) 4.0 4.0 2.1 2.2 1.4 2.0 4.0 4.6 1.9 0.7 3.3 3.3 0.6 WIND STEADINESES (MEAN %) 85.1 75.5 50.0 53.7 34.1 51.3 88.9 90.2 47.5 24.1 75.0 73.3 14.0 WIND SPEED (MEAN KNOTS) 4.7 5.3 4.2 4.1 4.1 3.9 4.5 5.1 4.0 2.9 4.4 4.5 4.3 FASTEST WIND DIRECTION 270 230 240 240 210 250 80 60 30 250 210 250 210 FASTEST WIND SPEED (KNOTS) 27 23 21 29 39 27 17 19 19 21 29 29 39 DAY 13 16 1 21 2 14 4 26 1 31 9 5 DAYS WITH SKY CLEAR (0-2)/8 12 10 15 6 14 23 19 21 26 14 13 13 186 DAYS WITH P.CLOUDY (3-6)/8 10 7 6 13 6 7 9 7 4 12 11 7 99 DAYS WITH CLOUDY (7-8)/8 9 11 10 11 11 0 3 3 0 5 6 11 80 DAYS WITH VISIBILITY =< 2 KM 2 2 4 4 0 0 0 0 0 1 0 4 17 DURATION OF SUNSHINE HOURS ****** ****** 195.7 99.3 ****** ****** ****** ****** ****** ****** 114.6 139.3 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 862.0 859.3 863.2 858.4 860.6 858.5 859.4 860.5 860.8 864.4 863.8 863.0 861.2 MAX. QFE PRESSURE IN HPA 869.7 869.3 875.9 866.7 868.0 864.3 863.8 866.3 867.1 875.0 872.2 870.8 875.9 DAY-HOUR 26- 6 8- 6 16-21 24-21 15-21 30- 6 31- 6 29- 6 16- 6 15- 6 22- 6 28- 6 MIN. QFE PRESSURE IN HPA 851.5 846.7 854.9 848.2 847.8 849.9 852.6 854.5 854.2 856.7 852.9 856.6 846.7 DAY-HOUR 17-12 15-15 31-21 1-15 2- 9 15-12 27-12 7-12 13-15 25-21 9-12 22- 9 MEAN QNH PRESSURE IN HPA 1018.7 1015.6 1020.1 1014.6 1017.1 1014.7 1015.7 1017.0 1017.3 1021.5 1020.8 1019.9 1017.7 MAX. QNH PRESSURE IN HPA 1027.5 1027.1 1034.6 1024.1 1025.6 1021.4 1020.8 1023.6 1024.6 1033.6 1030.4 1028.8 1034.6 DAY-HOUR 26- 6 8- 6 16-21 24-21 15-21 30- 6 31- 6 29- 6 16- 6 15- 6 22- 6 28- 6 MIN. QNH PRESSURE IN HPA 1006.7 1001.2 1010.6 1002.9 1002.5 1004.9 1008.0 1010.1 1009.8 1012.6 1008.3 1012.5 1001.2 DAY-HOUR 17-12 15-15 31-21 1-15 2- 9 15-12 27-12 7-12 13-15 25-21 9-12 22- 9 MEAN QFF PRESSURE IN HPA 1025.2 1020.5 1021.7 1012.9 1012.3 1005.9 1006.0 1008.1 1009.3 1017.6 1018.8 1022.8 1015.1 MAX. QFF PRESSURE IN HPA 1039.9 1035.1 1044.4 1026.5 1024.2 1014.1 1015.2 1016.4 1019.6 1037.1 1032.8 1039.5 1044.4 DAY-HOUR 8-18 4-18 16-21 3- 3 16- 0 30- 6 31-18 1-21 16-18 15- 6 13-18 27- 6 MIN. QFF PRESSURE IN HPA 1008.8 1001.8 1010.2 1000.9 995.6 996.0 996.7 1000.7 999.5 1007.3 1002.2 1012.6 995.6 DAY-HOUR 4- 9 15-12 24-12 21-12 2- 9 15-12 27-12 7-12 13-12 25-21 9-12 17-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 861.9 859.4 863.0 858.3 860.8 859.3 859.8 861.0 861.3 864.5 863.9 863.1 861.3 MAX. QFE PRESSURE IN HPA 868.6 868.6 875.2 865.7 868.0 863.1 863.4 865.0 866.3 873.2 871.8 870.2 875.2 DAY 9 8 17 25 16 7 17 29 24 16 23 28 MIN. QFE PRESSURE IN HPA 853.2 849.3 856.8 852.6 851.7 851.7 856.6 856.2 855.8 858.2 856.6 858.9 849.3 DAY 4 16 1 1 13 27 27 7 5 26 9 17 MEAN QNH PRESSURE IN HPA 1018.6 1015.7 1019.8 1014.5 1017.4 1015.6 1016.2 1017.5 1017.9 1021.6 1020.8 1019.9 1018.0 MAX. QNH PRESSURE IN HPA 1026.3 1026.3 1033.8 1023.0 1025.6 1020.0 1020.3 1022.2 1023.6 1031.5 1029.9 1028.1 1033.8 DAY 9 8 17 25 16 7 17 29 24 16 23 28 MIN. QNH PRESSURE IN HPA 1008.6 1004.2 1012.8 1008.0 1006.9 1006.9 1012.5 1012.1 1011.6 1014.4 1012.5 1015.2 1004.2 DAY 4 16 1 1 13 27 27 7 5 26 9 17 MEAN QFF PRESSURE IN HPA 1024.6 1020.1 1021.1 1012.5 1012.6 1006.7 1006.4 1008.5 1009.4 1017.2 1018.1 1022.4 1015.0 MAX. QFF PRESSURE IN HPA 1037.8 1032.1 1043.8 1025.4 1024.2 1012.9 1011.7 1016.0 1015.9 1033.7 1030.4 1035.9 1043.8 DAY 9 8 17 3 16 7 31 2 24 15 14 28 MIN. QFF PRESSURE IN HPA 1009.9 1004.6 1012.1 1003.5 1000.3 997.7 1000.3 1003.2 1000.5 1009.9 1006.9 1013.2 997.7 DAY 4 16 24 28 12 27 28 7 14 1 9 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 861.8 859.3 863.4 858.6 861.1 859.6 860.2 861.3 861.7 864.8 864.0 863.0 861.6 MAX. QFE PRESSURE IN HPA 868.5 868.6 874.9 865.5 867.7 864.2 863.7 866.2 866.1 873.6 871.9 870.0 874.9 DAY 26 8 17 25 16 30 31 29 24 15 23 28 MIN. QFE PRESSURE IN HPA 852.7 850.6 856.8 851.4 850.5 851.9 856.6 856.9 856.0 859.0 856.8 858.2 850.5 DAY 4 16 1 1 2 27 27 7 5 26 9 22 MEAN QNH PRESSURE IN HPA 1018.5 1015.6 1020.3 1014.8 1017.7 1016.0 1016.6 1018.0 1018.4 1021.9 1021.1 1019.9 1018.2 MAX. QNH PRESSURE IN HPA 1026.2 1026.3 1033.5 1022.7 1025.2 1021.2 1020.7 1023.5 1023.4 1032.0 1030.1 1027.9 1033.5 DAY 26 8 17 25 16 30 31 29 24 15 23 28 MIN. QNH PRESSURE IN HPA 1008.1 1005.7 1012.8 1006.6 1005.5 1007.1 1012.5 1012.9 1011.8 1015.3 1012.8 1014.4 1005.5 DAY 4 16 1 1 2 27 27 7 5 26 9 22 MEAN QFF PRESSURE IN HPA 1025.4 1021.0 1022.3 1013.4 1013.2 1007.6 1007.4 1009.6 1011.1 1018.6 1019.7 1023.2 1016.1 MAX. QFF PRESSURE IN HPA 1038.6 1033.1 1043.7 1026.5 1024.0 1013.7 1013.6 1015.9 1017.3 1035.6 1031.1 1038.1 1043.7 DAY 9 5 17 3 16 7 31 29 23 15 14 27 MIN. QFF PRESSURE IN HPA 1009.4 1007.2 1012.2 1004.1 999.0 997.8 1001.5 1004.2 1002.7 1011.6 1007.7 1013.9 997.8 DAY 4 16 24 28 2 27 28 7 14 25 9 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 862.6 860.0 864.1 859.0 861.1 859.4 860.1 861.4 862.0 865.5 864.8 863.8 862.0 MAX. QFE PRESSURE IN HPA 869.7 869.3 875.0 865.4 867.6 864.3 863.8 866.3 867.1 875.0 872.2 870.8 875.0 DAY 26 8 17 25 16 30 31 29 16 15 22 28 MIN. QFE PRESSURE IN HPA 853.5 850.6 856.7 851.3 849.4 852.9 855.9 857.4 856.0 860.2 856.5 858.4 849.4 DAY 4 15 1 1 2 27 27 7 5 26 9 22 MEAN QNH PRESSURE IN HPA 1019.4 1016.4 1021.1 1015.3 1017.7 1015.8 1016.5 1018.0 1018.7 1022.7 1021.9 1020.7 1018.7 MAX. QNH PRESSURE IN HPA 1027.5 1027.1 1033.6 1022.6 1025.1 1021.4 1020.8 1023.6 1024.6 1033.6 1030.4 1028.8 1033.6 DAY 26 8 17 25 16 30 31 29 16 15 22 28 MIN. QNH PRESSURE IN HPA 1009.0 1005.7 1012.6 1006.5 1004.3 1008.3 1011.7 1013.5 1011.8 1016.7 1012.4 1014.6 1004.3 DAY 4 15 1 1 2 27 27 7 5 26 9 22 MEAN QFF PRESSURE IN HPA 1026.5 1021.6 1023.0 1013.8 1012.9 1007.0 1006.7 1009.4 1011.0 1019.2 1020.3 1024.1 1016.3 MAX. QFF PRESSURE IN HPA 1039.5 1034.4 1042.9 1026.3 1023.7 1014.1 1014.1 1016.3 1019.3 1037.1 1031.5 1039.5 1042.9 DAY 9 8 17 3 16 30 31 29 16 15 14 27 MIN. QFF PRESSURE IN HPA 1010.4 1006.4 1012.8 1004.3 997.7 999.5 1000.6 1004.3 1002.1 1012.7 1006.5 1015.7 997.7 DAY 4 15 1 15 2 27 27 7 5 26 9 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 861.9 859.6 863.6 858.4 860.3 858.2 859.2 860.2 860.6 864.4 863.7 862.9 861.1 MAX. QFE PRESSURE IN HPA 869.3 868.6 873.9 864.3 866.7 862.9 863.6 865.2 866.3 874.8 870.9 870.2 874.8 DAY 26 8 17 25 16 30 31 29 16 15 23 28 MIN. QFE PRESSURE IN HPA 852.9 848.6 856.0 849.7 847.8 851.7 854.0 856.0 855.4 859.1 853.8 856.6 847.8 DAY 4 15 11 1 2 15 27 7 5 25 9 22 MEAN QNH PRESSURE IN HPA 1018.6 1016.0 1020.6 1014.6 1016.7 1014.3 1015.5 1016.6 1017.1 1021.5 1020.6 1019.7 1017.7 MAX. QNH PRESSURE IN HPA 1027.1 1026.3 1032.3 1021.4 1024.1 1019.7 1020.5 1022.4 1023.6 1033.4 1028.9 1028.1 1033.4 DAY 26 8 17 25 16 30 31 29 16 15 23 28 MIN. QNH PRESSURE IN HPA 1008.3 1003.4 1011.8 1004.6 1002.5 1006.9 1009.6 1011.8 1011.2 1015.4 1009.3 1012.5 1002.5 DAY 4 15 11 1 2 15 27 7 5 25 9 22 MEAN QFF PRESSURE IN HPA 1024.7 1020.4 1022.0 1012.6 1011.7 1005.3 1005.6 1007.5 1008.6 1017.1 1018.0 1022.2 1014.6 MAX. QFF PRESSURE IN HPA 1037.0 1032.8 1041.7 1025.5 1021.6 1012.3 1014.0 1016.0 1017.9 1036.1 1029.2 1036.5 1041.7 DAY 9 4 17 3 16 30 31 1 16 15 14 27 MIN. QFF PRESSURE IN HPA 1008.8 1003.4 1010.9 1002.7 995.6 998.3 998.0 1002.4 1001.1 1010.3 1003.2 1013.9 995.6 DAY 4 15 11 28 2 15 27 7 5 25 9 6 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 861.1 858.5 862.4 857.5 859.4 856.8 858.0 859.0 859.1 863.4 862.7 862.1 860.0 MAX. QFE PRESSURE IN HPA 868.5 867.1 873.1 863.4 866.4 861.5 861.7 864.4 865.2 874.1 869.9 869.6 874.1 DAY 26 8 16 3 15 30 31 29 16 15 22 28 MIN. QFE PRESSURE IN HPA 851.5 847.2 856.0 848.5 849.9 849.9 852.6 854.5 854.4 857.8 852.9 856.7 847.2 DAY 17 15 11 1 2 15 27 7 13 25 9 22 MEAN QNH PRESSURE IN HPA 1017.7 1014.8 1019.2 1013.6 1015.8 1012.7 1014.2 1015.3 1015.4 1020.3 1019.5 1018.8 1016.4 MAX. QNH PRESSURE IN HPA 1026.2 1024.6 1031.4 1020.3 1023.8 1018.1 1018.4 1021.5 1022.4 1032.6 1027.8 1027.4 1032.6 DAY 26 8 16 3 15 30 31 29 16 15 22 28 MIN. QNH PRESSURE IN HPA 1006.7 1001.8 1011.8 1003.3 1004.9 1004.9 1008.0 1010.1 1010.0 1013.9 1008.3 1012.6 1001.8 DAY 17 15 11 1 2 15 27 7 13 25 9 22 MEAN QFF PRESSURE IN HPA 1023.8 1019.0 1020.4 1011.5 1010.9 1003.9 1004.4 1006.1 1006.7 1015.9 1016.8 1021.2 1013.4 MAX. QFF PRESSURE IN HPA 1034.3 1030.6 1039.7 1025.8 1021.5 1010.7 1011.9 1015.4 1016.3 1034.8 1027.7 1036.3 1039.7 DAY 9 8 16 3 15 30 31 1 16 15 13 27 MIN. QFF PRESSURE IN HPA 1009.7 1001.8 1010.2 1000.9 998.8 996.0 996.7 1000.7 999.5 1008.0 1002.2 1012.6 996.0 DAY 4 15 24 21 2 15 27 7 13 25 9 17 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 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 861.7 858.9 862.6 857.6 859.7 856.9 858.1 859.1 859.4 863.7 863.5 862.7 860.3 MAX. QFE PRESSURE IN HPA 868.3 867.5 874.5 863.5 866.8 861.2 862.6 864.6 865.5 874.4 871.2 870.1 874.5 DAY 26 7 16 24 15 4 31 29 16 15 22 28 MIN. QFE PRESSURE IN HPA 851.9 846.7 856.1 848.2 852.3 850.3 852.9 855.2 854.2 857.3 854.5 857.1 846.7 DAY 17 15 31 1 12 26 27 6 13 25 9 17 MEAN QNH PRESSURE IN HPA 1018.4 1015.1 1019.4 1013.7 1016.1 1012.9 1014.2 1015.4 1015.7 1020.6 1020.4 1019.6 1016.8 MAX. QNH PRESSURE IN HPA 1025.9 1025.0 1033.0 1020.4 1024.2 1017.8 1019.4 1021.7 1022.7 1032.9 1029.2 1028.0 1033.0 DAY 26 7 16 24 15 4 31 29 16 15 22 28 MIN. QNH PRESSURE IN HPA 1007.1 1001.2 1012.0 1002.9 1007.6 1005.3 1008.3 1010.9 1009.8 1013.3 1010.1 1013.1 1001.2 DAY 17 15 31 1 12 26 27 6 13 25 9 17 MEAN QFF PRESSURE IN HPA 1025.4 1020.4 1021.3 1012.3 1011.6 1004.5 1004.9 1006.8 1008.3 1017.3 1019.1 1023.0 1014.6 MAX. QFF PRESSURE IN HPA 1037.4 1033.8 1042.5 1024.9 1022.7 1010.2 1013.5 1015.0 1017.3 1035.2 1029.9 1038.6 1042.5 DAY 8 4 16 3 15 7 31 1 16 15 13 27 MIN. QFF PRESSURE IN HPA 1011.2 1002.4 1011.5 1001.2 1001.9 996.7 997.3 1001.5 999.8 1009.3 1004.9 1014.0 996.7 DAY 4 15 31 1 2 26 27 6 13 25 9 17 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 862.5 859.5 863.4 859.0 861.0 858.8 859.6 860.8 861.1 864.6 864.2 863.3 861.5 MAX. QFE PRESSURE IN HPA 869.1 868.3 875.6 865.6 867.9 862.9 863.8 865.7 866.8 874.7 871.5 870.1 875.6 DAY 26 7 16 24 15 4 31 29 16 15 22 28 MIN. QFE PRESSURE IN HPA 852.4 848.0 856.6 849.9 853.1 851.7 855.4 856.2 855.5 856.8 856.0 858.0 848.0 DAY 17 15 31 1 12 26 27 6 13 25 9 17 MEAN QNH PRESSURE IN HPA 1019.2 1015.9 1020.4 1015.3 1017.6 1015.0 1016.0 1017.4 1017.7 1021.7 1021.2 1020.2 1018.1 MAX. QNH PRESSURE IN HPA 1026.8 1025.9 1034.3 1022.8 1025.5 1019.7 1020.8 1023.0 1024.2 1033.3 1029.6 1028.0 1034.3 DAY 26 7 16 24 15 4 31 29 16 15 22 28 MIN. QNH PRESSURE IN HPA 1007.7 1002.7 1012.5 1004.9 1008.5 1006.9 1011.2 1012.1 1011.3 1012.8 1011.8 1014.1 1002.7 DAY 17 15 31 1 12 26 27 6 13 25 9 17 MEAN QFF PRESSURE IN HPA 1026.3 1021.0 1022.2 1013.7 1012.7 1006.3 1006.2 1008.6 1009.9 1018.2 1019.7 1023.6 1015.7 MAX. QFF PRESSURE IN HPA 1039.9 1035.1 1043.9 1025.2 1024.0 1011.7 1015.2 1016.2 1019.6 1035.1 1032.8 1038.6 1043.9 DAY 8 4 16 3 15 29 31 1 16 15 13 27 MIN. QFF PRESSURE IN HPA 1012.1 1003.6 1011.5 1004.0 1002.9 997.2 999.9 1003.0 999.8 1007.7 1006.0 1014.6 997.2 DAY 3 15 4 28 11 26 27 6 13 25 9 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 862.4 859.5 863.5 858.9 861.2 859.2 860.0 861.1 861.4 864.6 864.2 863.3 861.6 MAX. QFE PRESSURE IN HPA 868.8 868.9 875.9 866.7 868.0 862.9 863.8 865.3 866.3 874.3 871.8 870.1 875.9 DAY 8 7 16 24 15 6 31 28 23 15 22 28 MIN. QFE PRESSURE IN HPA 853.5 848.0 854.9 851.8 852.8 851.9 856.5 856.4 855.8 856.7 856.5 858.7 848.0 DAY 17 15 31 1 12 26 29 6 4 25 9 18 MEAN QNH PRESSURE IN HPA 1019.1 1015.9 1020.4 1015.2 1017.8 1015.6 1016.4 1017.7 1018.0 1021.7 1021.2 1020.2 1018.3 MAX. QNH PRESSURE IN HPA 1026.5 1026.6 1034.6 1024.1 1025.6 1019.7 1020.8 1022.5 1023.6 1032.8 1029.9 1028.0 1034.6 DAY 8 7 16 24 15 6 31 28 23 15 22 28 MIN. QNH PRESSURE IN HPA 1009.0 1002.7 1010.6 1007.0 1008.2 1007.1 1012.4 1012.3 1011.6 1012.6 1012.4 1014.9 1002.7 DAY 17 15 31 1 12 26 29 6 4 25 9 18 MEAN QFF PRESSURE IN HPA 1025.3 1020.3 1021.7 1013.2 1012.7 1006.4 1006.5 1008.5 1009.6 1017.3 1018.7 1022.8 1015.2 MAX. QFF PRESSURE IN HPA 1039.6 1034.7 1044.4 1024.9 1023.8 1011.9 1015.1 1016.4 1017.8 1034.2 1031.8 1034.9 1044.4 DAY 8 4 16 2 15 6 31 1 16 15 13 27 MIN. QFF PRESSURE IN HPA 1010.0 1003.2 1010.2 1001.8 1002.1 996.9 1000.4 1002.9 999.9 1007.3 1006.2 1012.9 996.9 DAY 3 15 31 28 11 26 27 6 13 25 9 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION AHAR (40704) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 38 26 N LONGITUDE 47 4 E DATA PROCESSING CENTER ELEVATION 1390.5 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.0 -1.3 3.0 11.6 13.6 18.2 22.3 21.4 17.3 13.1 5.8 -0.3 10.2 MINIMUN AIR TEMPERATURE (C) -6.4 -6.2 -1.2 5.2 7.5 11.7 14.9 15.4 10.4 8.3 1.0 -3.3 4.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 25 17 7 0 0 0 0 0 0 0 2 16 67 DAYS WITH FREEZING MIN.<= 0 31 23 17 1 0 0 0 0 0 0 13 23 108 TEMPERATURE RECORDS LOWEST(C) -19.0 -14.5 -17.5 -0.6 3.0 6.0 9.4 11.0 4.2 4.4 -5.0 -11.6 -19.0 DAY 25 13 11 13 7 8 12 14 27 17 18 19 MAXIMUM AIR TEMPERATURE (C) 2.9 3.7 7.7 18.2 20.2 24.4 28.8 27.2 24.5 19.2 11.7 3.7 16.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 16 5 3 0 0 0 27 DAYS WITH MAXIMUM TEMP. <= 0 8 9 5 0 0 0 0 0 0 0 0 5 27 TEMPERATURE RECORDS HIGHEST(C) 9.5 11.4 21.0 25.0 25.5 30.2 34.0 34.5 31.2 24.6 19.2 12.0 34.5 DAY 7 25 30 21 21 30 5 1 18 6 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 9.3 9.9 8.9 13.0 12.7 12.7 13.9 11.8 14.1 10.9 10.7 7.0 11.2 MEAN DAILY TEMP. (MDT) (C) -1.8 -1.2 3.3 11.7 13.9 18.1 21.8 21.3 17.5 13.7 6.4 0.2 10.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.8 48.6 31.3 0.2 0.0 0.0 0.0 82.0 HEATING DEG. DAYS(BASE 18 0C) 612.4 538.7 456.1 188.9 131.0 29.8 2.0 1.7 36.9 132.0 348.5 551.9 3029.9 DEWPOINT (MEAN C) -6.6 -6.8 -1.6 2.6 5.1 9.7 10.2 11.1 7.4 5.8 0.9 -3.9 2.8 MIXING RATIO (G/KG) 2.82 2.84 4.14 5.50 6.61 8.97 9.30 9.82 7.68 6.80 4.84 3.44 6.06 VAPOUR PRESSURE (HPA) 3.89 3.90 5.68 7.53 9.02 12.22 12.63 13.35 10.53 9.35 6.68 4.72 8.29 SATURATION DEF. (HPA) 1.63 2.11 2.58 6.97 7.29 9.56 15.54 12.98 10.19 6.24 2.86 1.46 6.62 RELATIVE HUMIDITY (MEAN %) 73 69 76 59 62 62 50 55 56 65 74 78 65 RELATIVE HUMIDITY (MAX. %) 85 84 91 87 88 86 72 75 79 85 91 90 84 RELATIVE HUMIDITY (MIN. %) 56 50 60 35 37 40 31 37 33 43 52 63 45 RELATIVE HUMIDITY (MEAN% 03UTC) 79 80 86 79 80 82 69 72 76 80 86 83 79 RELATIVE HUMIDITY (MEAN% 09UTC) 64 58 66 45 44 47 37 43 41 49 58 70 52 RELATIVE HUMIDITY (MEAN% 15UTC) 70 64 69 43 47 49 38 44 43 55 69 80 56 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 5.7 19.4 66.4 23.4 54.0 54.8 5.3 1.0 0.0 24.1 23.5 38.0 315.6 DAYS WITH PRECIPITATION >=10 0 0 3 1 2 2 0 0 0 0 1 1 10 DAYS WITH PRECIPITATION >= 5 0 1 5 1 3 4 0 0 0 3 2 4 23 DAYS WITH PRECIPITATION >= 1 1 6 10 5 12 6 2 1 0 4 4 6 57 DAYS WITH PRECIPITATION 6 11 19 8 20 9 5 2 0 6 8 11 105 GREATEST DAILY PRECIPITATION 4.3 8.0 11.0 16.0 13.0 23.0 3.0 1.0 0.0 9.2 12.0 11.0 23.0 DAY 23 27 6 12 24