STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.4 -3.3 7.2 13.1 15.8 22.0 25.6 25.0 18.1 11.0 7.2 -5.2 11.4 MINIMUN AIR TEMPERATURE (C) -4.5 -9.2 2.5 6.8 9.3 13.6 16.4 16.9 10.0 3.6 2.9 -10.5 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 18 23 0 0 0 0 0 0 0 0 1 26 68 DAYS WITH FREEZING MIN.<= 0 30 28 8 0 0 0 0 0 0 6 5 31 108 TEMPERATURE RECORDS LOWEST(C) -9.8 -21.8 -2.6 0.6 0.4 8.4 12.6 13.8 3.6 -1.4 -6.2 -17.8 -21.8 DAY 31 7 1 5 2 18 5 2 30 26 17 30 MAXIMUM AIR TEMPERATURE (C) 5.9 2.2 12.2 20.3 22.9 29.1 32.4 32.9 27.4 19.9 14.0 1.2 18.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 14 31 25 4 0 0 0 76 DAYS WITH MAXIMUM TEMP. <= 0 2 12 0 0 0 0 0 0 0 0 0 11 25 TEMPERATURE RECORDS HIGHEST(C) 11.2 11.2 18.0 28.2 32.6 35.0 35.6 38.4 32.6 28.6 21.4 10.6 38.4 DAY 8 12 21 17 29 21 26 28 3 19 2 14 DIF. BETWEEN (MAX.-MIN.) (C) 10.4 11.4 9.7 13.5 13.6 15.5 16.0 16.0 17.4 16.3 11.1 11.7 13.6 MEAN DAILY TEMP. (MDT) (C) 0.7 -3.5 7.4 13.5 16.1 21.3 24.4 24.9 18.7 11.7 8.4 -4.7 11.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 5.5 31.7 105.7 121.3 6.0 0.0 0.0 0.0 270.2 HEATING DEG. DAYS(BASE 18 0C) 535.0 623.8 329.9 141.3 81.7 0.7 0.0 0.0 19.5 197.7 286.6 702.4 2918.6 DEWPOINT (MEAN C) -4.0 -7.2 2.9 5.0 5.7 7.2 7.4 8.7 3.4 1.4 2.2 -8.0 2.1 MIXING RATIO (G/KG) 3.33 2.76 5.55 6.41 6.81 7.54 7.68 8.54 5.97 4.97 5.23 2.57 5.61 VAPOUR PRESSURE (HPA) 4.63 3.86 7.67 8.84 9.39 10.38 10.56 11.73 8.27 6.93 7.28 3.60 7.76 SATURATION DEF. (HPA) 1.88 1.37 2.82 7.35 9.77 17.35 23.66 21.44 13.83 7.38 3.42 0.84 9.26 RELATIVE HUMIDITY (MEAN %) 75 75 76 63 56 43 35 41 41 57 74 82 60 RELATIVE HUMIDITY (MAX. %) 89 87 91 84 79 67 57 64 63 78 90 91 78 RELATIVE HUMIDITY (MIN. %) 54 61 59 41 34 25 19 22 23 33 53 70 41 RELATIVE HUMIDITY (MEAN% 03UTC) 88 85 90 81 74 64 55 63 60 76 86 84 76 RELATIVE HUMIDITY (MEAN% 09UTC) 62 67 68 49 40 31 22 27 28 40 57 74 47 RELATIVE HUMIDITY (MEAN% 15UTC) 77 77 72 54 50 32 24 29 32 51 71 85 55 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 27.0 14.9 62.6 90.5 47.9 0.5 0.0 0.0 0.0 30.9 37.5 30.0 341.8 DAYS WITH PRECIPITATION >=10 1 0 2 4 2 0 0 0 0 2 1 1 13 DAYS WITH PRECIPITATION >= 5 2 1 4 6 4 0 0 0 0 2 2 3 24 DAYS WITH PRECIPITATION >= 1 4 4 7 7 7 0 0 0 0 2 5 5 41 DAYS WITH PRECIPITATION 10 16 15 8 11 2 0 0 4 2 11 9 88 GREATEST DAILY PRECIPITATION 11.3 6.0 18.2 29.0 14.2 0.3 0.0 0.0 0.0 20.9 19.0 10.0 29.0 DAY 30 14 27 26 2 1 ** ** ** 20 16 7 DAY WITH THUNDER STORM 0 0 3 5 8 0 0 0 0 1 0 0 17 DAYS WITH SNOW OR SLEET 7 10 4 1 1 0 0 0 0 1 3 9 36 DAYS WITH DUST 0 0 0 0 0 2 0 1 0 0 1 0 4 WIND DIRECTION (PREVAILING) 315 315 135 135 135 90 45 45 90 315 135 135 135 PREVAILING WIND SPEED(KNOTS) 5.7 7.4 7.2 6.6 6.9 8.0 9.2 9.5 6.0 6.2 5.8 5.3 6.5 PREVAILING WIND PERCENT 12.4 20.7 31.5 16.7 17.1 22.4 29.5 23.6 17.5 15.3 14.6 16.0 13.8 CALMS PERCENT OF WIND 69.4 56.1 28.4 44.8 34.6 23.3 35.9 18.6 45.4 50.4 59.6 62.6 44.1 NO. OF WIND OBSERVATION 186 164 197 210 217 210 217 220 240 248 240 238 2587 VECTOR WIND DIRECTION (MEAN) 187 293 166 179 106 66 47 62 93 266 179 148 84 VECTOR WIND MAGNITUDE(KNOTS) 0.4 1.3 2.0 0.7 0.9 2.4 3.6 3.4 1.6 0.5 0.8 0.3 0.8 WIND STEADINESES (MEAN %) 19.0 43.3 40.8 18.4 19.1 40.0 67.9 54.8 48.5 16.1 33.3 15.0 20.5 WIND SPEED (MEAN KNOTS) 2.1 3.0 4.9 3.8 4.7 6.0 5.3 6.2 3.3 3.1 2.4 2.0 3.9 FASTEST WIND DIRECTION 140 310 300 170 230 300 90 60 300 300 270 160 60 FASTEST WIND SPEED (KNOTS) 12 14 14 16 16 16 16 17 14 14 14 12 17 DAY 5 14 9 11 1 15 5 4 4 10 12 1 DAYS WITH SKY CLEAR (0-2)/8 15 10 2 12 8 27 29 28 24 22 10 17 204 DAYS WITH P.CLOUDY (3-6)/8 11 13 18 14 18 3 2 3 6 7 15 6 116 DAYS WITH CLOUDY (7-8)/8 5 6 11 4 5 0 0 0 0 2 5 8 46 DAYS WITH VISIBILITY =< 2 KM 2 2 0 0 1 0 0 0 0 0 3 7 15 DURATION OF SUNSHINE HOURS ****** 103.6 134.8 215.3 239.5 344.9 362.4 338.3 289.7 253.3 150.1 136.4 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 870.9 873.6 868.8 867.5 867.9 867.8 866.6 866.4 871.5 873.9 872.4 874.5 870.2 MAX. QFE PRESSURE IN HPA 879.4 881.6 876.6 875.1 873.7 871.7 870.3 870.7 876.6 881.9 882.6 882.5 882.6 DAY-HOUR 4-18 23- 6 5- 6 14- 6 12- 6 13- 6 4- 3 30- 6 22- 6 22- 6 27- 6 18-15 MIN. QFE PRESSURE IN HPA 864.7 859.9 857.9 860.6 859.1 861.4 863.0 861.8 865.1 863.1 861.1 863.1 857.9 DAY-HOUR 14-12 8- 3 16-12 25-12 29-12 21- 0 15-12 15-12 8-15 18- 9 12-12 7- 9 MEAN QNH PRESSURE IN HPA 1016.3 1019.4 1014.0 1012.5 1013.0 1012.9 1011.5 1011.3 1017.0 1019.8 1018.1 1020.4 1015.5 MAX. QNH PRESSURE IN HPA 1026.0 1028.5 1022.8 1021.1 1019.5 1017.3 1015.7 1016.1 1022.8 1028.8 1029.6 1029.5 1029.6 DAY-HOUR 4-18 23- 6 5- 6 14- 6 12- 6 13- 6 4- 3 30- 6 22- 6 22- 6 27- 6 18-15 MIN. QNH PRESSURE IN HPA 1009.3 1003.9 1001.6 1004.7 1003.0 1005.6 1007.4 1006.1 1009.8 1007.5 1005.3 1007.5 1001.6 DAY-HOUR 14-12 8- 3 16-12 25-12 29-12 21- 0 15-12 15-12 8-15 18- 9 12-12 7- 9 MEAN QFF PRESSURE IN HPA 1021.1 ****** 1013.9 1009.0 1008.1 1004.8 1001.7 1001.6 1010.7 1017.4 1017.6 1027.5 ****** MAX. QFF PRESSURE IN HPA 1031.3 ****** 1025.8 1020.8 1016.6 1011.5 1007.1 1009.0 1018.1 1030.2 1031.0 1038.8 ****** DAY-HOUR 5- 6 **-** 5- 6 4-15 12- 3 16- 3 4- 3 31- 3 30-15 22- 3 30-18 18-18 MIN. QFF PRESSURE IN HPA 1012.6 ****** 1001.9 997.0 993.9 995.7 996.8 994.7 1002.7 1000.1 1001.9 1009.6 ****** DAY-HOUR 17- 3 **-** 26-12 25-12 29-12 21- 0 15-15 15-12 8-12 18-12 12-12 14- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 867.5 867.9 867.8 866.6 866.5 871.5 873.9 872.3 874.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 874.0 872.7 871.0 870.1 870.2 875.4 881.2 880.3 881.7 ****** DAY ** ** ** 14 12 13 4 31 22 22 27 19 MIN. QFE PRESSURE IN HPA ****** ****** ****** 861.8 861.2 861.4 863.2 863.3 866.8 865.5 864.6 866.5 ****** DAY ** ** ** 10 30 21 16 8 9 18 13 14 MEAN QNH PRESSURE IN HPA ****** ****** ****** 1012.5 1013.0 1012.9 1011.5 1011.4 1017.1 1019.8 1018.0 1020.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1019.9 1018.4 1016.5 1015.5 1015.6 1021.5 1028.0 1027.0 1028.6 ****** DAY ** ** ** 14 12 13 4 31 22 22 27 19 MIN. QNH PRESSURE IN HPA ****** ****** ****** 1006.1 1005.4 1005.6 1007.6 1007.8 1011.7 1010.3 1009.2 1011.4 ****** DAY ** ** ** 10 30 21 16 8 9 18 13 14 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1008.5 1007.8 1004.6 1001.6 1001.2 1010.2 1016.8 1016.8 1026.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1018.4 1015.3 1010.1 1006.2 1007.1 1014.8 1029.2 1027.7 1037.2 ****** DAY ** ** ** 5 12 16 4 31 27 22 27 19 MIN. QFF PRESSURE IN HPA ****** ****** ****** 1000.2 995.6 995.7 997.1 996.6 1004.4 1002.6 1006.9 1014.0 ****** DAY ** ** ** 10 30 21 16 16 3 18 13 14 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 870.8 873.2 868.8 867.7 868.1 868.5 867.2 867.2 872.0 874.2 872.5 874.3 870.4 MAX. QFE PRESSURE IN HPA 879.0 881.1 876.4 874.4 873.0 871.4 870.3 870.5 876.0 881.4 881.1 881.7 881.7 DAY 5 23 29 14 12 13 4 31 22 22 27 19 MIN. QFE PRESSURE IN HPA 865.5 859.9 859.6 861.6 861.1 862.1 864.2 863.6 867.4 864.5 864.8 865.0 859.6 DAY 17 8 15 10 30 21 16 8 8 18 13 7 MEAN QNH PRESSURE IN HPA 1016.2 1019.0 1014.0 1012.7 1013.2 1013.6 1012.2 1012.2 1017.6 1020.1 1018.2 1020.3 1015.8 MAX. QNH PRESSURE IN HPA 1025.6 1027.9 1022.6 1020.3 1018.8 1016.9 1015.7 1015.9 1022.2 1028.3 1027.9 1028.6 1028.6 DAY 5 23 29 14 12 13 4 31 22 22 27 19 MIN. QNH PRESSURE IN HPA 1010.3 1003.9 1003.6 1005.8 1005.3 1006.4 1008.8 1008.1 1012.4 1009.1 1009.5 1009.7 1003.6 DAY 17 8 15 10 30 21 16 8 8 18 13 7 MEAN QFF PRESSURE IN HPA 1020.8 1026.0 1014.2 1009.7 1008.7 1005.9 1002.9 1003.1 1012.4 1018.9 1018.3 1028.5 1014.1 MAX. QFF PRESSURE IN HPA 1030.2 1036.9 1024.4 1019.9 1016.6 1011.5 1007.1 1009.0 1017.7 1030.2 1029.8 1038.3 1038.3 DAY 5 19 5 5 12 16 4 31 30 22 27 19 MIN. QFF PRESSURE IN HPA 1012.6 1008.9 1002.9 999.8 997.4 997.0 998.9 999.1 1006.6 1003.8 1009.2 1013.4 997.0 DAY 17 14 13 10 30 21 16 8 9 18 12 7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 871.8 874.5 869.7 868.3 868.4 868.7 867.2 867.4 872.4 874.9 873.4 875.4 871.0 MAX. QFE PRESSURE IN HPA 879.2 881.6 876.6 875.1 873.7 871.7 869.7 870.7 876.6 881.9 882.6 882.2 882.6 DAY 5 23 5 14 12 13 3 30 22 22 27 18 MIN. QFE PRESSURE IN HPA 866.0 861.1 859.7 861.7 861.2 862.8 864.3 863.7 867.5 864.6 864.3 864.8 859.7 DAY 17 8 15 10 30 21 16 8 8 18 12 7 MEAN QNH PRESSURE IN HPA 1017.4 1020.4 1015.0 1013.4 1013.5 1013.8 1012.2 1012.5 1018.1 1020.9 1019.2 1021.5 1016.5 MAX. QNH PRESSURE IN HPA 1025.8 1028.5 1022.8 1021.1 1019.5 1017.3 1015.0 1016.1 1022.8 1028.8 1029.6 1029.2 1029.6 DAY 5 23 5 14 12 13 3 30 22 22 27 18 MIN. QNH PRESSURE IN HPA 1010.8 1005.3 1003.7 1005.9 1005.4 1007.2 1008.9 1008.2 1012.5 1009.2 1008.9 1009.5 1003.7 DAY 17 8 15 10 30 21 16 8 8 18 12 7 MEAN QFF PRESSURE IN HPA 1021.9 1026.2 1015.2 1010.0 1008.6 1005.6 1001.8 1002.4 1011.7 1018.5 1019.0 1029.1 1014.2 MAX. QFF PRESSURE IN HPA 1031.3 1037.2 1025.8 1019.4 1016.3 1010.7 1005.5 1008.0 1017.1 1030.0 1030.5 1037.7 1037.7 DAY 5 19 5 5 12 16 4 31 22 21 27 19 MIN. QFF PRESSURE IN HPA 1013.6 1011.1 1004.0 999.2 996.6 997.4 998.3 997.7 1006.0 1002.8 1007.5 1013.1 996.6 DAY 17 8 15 10 29 21 16 8 8 18 12 7 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 871.0 874.2 869.1 867.5 867.8 867.8 866.5 866.2 871.4 873.8 872.4 874.3 870.2 MAX. QFE PRESSURE IN HPA 878.2 880.9 876.0 874.1 873.5 870.8 868.6 869.2 875.0 880.6 881.2 881.5 881.5 DAY 4 19 5 14 12 12 1 30 22 21 27 16 MIN. QFE PRESSURE IN HPA 866.1 860.4 859.5 861.4 860.5 862.2 863.6 863.0 866.6 863.1 861.9 863.1 859.5 DAY 17 8 15 10 29 21 15 15 8 18 12 7 MEAN QNH PRESSURE IN HPA 1016.5 1020.1 1014.3 1012.5 1012.8 1012.8 1011.4 1011.1 1016.9 1019.7 1018.1 1020.3 1015.5 MAX. QNH PRESSURE IN HPA 1024.7 1027.7 1022.2 1020.0 1019.3 1016.3 1013.8 1014.4 1021.0 1027.4 1028.0 1028.4 1028.4 DAY 4 19 5 14 12 12 1 30 22 21 27 16 MIN. QNH PRESSURE IN HPA 1010.9 1004.5 1003.4 1005.6 1004.6 1006.5 1008.1 1007.4 1011.5 1007.5 1006.2 1007.5 1003.4 DAY 17 8 15 10 29 21 15 15 8 18 12 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1009.7 1016.4 1016.9 1025.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1015.3 1029.1 1028.2 1034.7 ****** DAY ** ** ** ** ** ** ** ** 30 21 27 19 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1003.9 1000.2 1003.8 1009.6 ****** DAY ** ** ** ** ** ** ** ** 9 18 12 14 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 870.0 873.2 867.7 866.5 867.0 866.9 865.9 865.1 870.3 872.8 871.7 873.8 869.2 MAX. QFE PRESSURE IN HPA 878.1 879.6 874.9 872.5 873.0 870.1 868.6 867.8 873.8 880.0 879.7 881.5 881.5 DAY 4 18 4 14 12 12 3 30 30 21 27 18 MIN. QFE PRESSURE IN HPA 864.7 860.2 857.9 860.6 859.1 862.1 863.0 861.8 865.2 863.1 861.1 864.4 857.9 DAY 14 8 16 25 29 21 15 15 8 18 12 7 MEAN QNH PRESSURE IN HPA 1015.3 1019.0 1012.8 1011.4 1011.9 1011.8 1010.7 1009.8 1015.7 1018.6 1017.3 1019.7 1014.5 MAX. QNH PRESSURE IN HPA 1024.5 1026.2 1020.9 1018.2 1018.8 1015.5 1013.8 1012.9 1019.7 1026.7 1026.4 1028.4 1028.4 DAY 4 18 4 14 12 12 3 30 30 21 27 18 MIN. QNH PRESSURE IN HPA 1009.3 1004.2 1001.6 1004.7 1003.0 1006.4 1007.4 1006.1 1009.9 1007.5 1005.3 1009.0 1001.6 DAY 14 8 16 25 29 21 15 15 8 18 12 7 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1007.4 1006.6 1003.6 1001.0 999.7 1008.8 1015.5 1016.3 1026.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1018.3 1014.8 1007.5 1004.3 1003.3 1015.7 1028.3 1027.8 1035.6 ****** DAY ** ** ** 4 12 15 3 4 30 21 30 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** 997.0 993.9 996.0 997.0 994.7 1002.7 1000.1 1001.9 1010.4 ****** DAY ** ** ** 25 29 21 15 15 8 18 12 14 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1984 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 870.6 873.7 868.1 867.0 867.4 867.1 866.1 865.3 870.7 873.5 872.2 874.4 869.7 MAX. QFE PRESSURE IN HPA 878.9 880.7 875.4 872.1 872.7 870.2 869.4 868.3 874.4 880.9 879.6 882.5 882.5 DAY 4 18 4 4 12 12 3 30 30 21 30 18 MIN. QFE PRESSURE IN HPA 864.8 861.0 858.6 862.5 859.7 861.9 863.0 862.1 865.1 865.1 862.5 864.8 858.6 DAY 14 8 15 9 29 20 15 15 8 18 12 14 MEAN QNH PRESSURE IN HPA 1016.1 1019.5 1013.3 1011.9 1012.4 1012.1 1010.9 1010.0 1016.1 1019.3 1017.9 1020.3 1015.0 MAX. QNH PRESSURE IN HPA 1025.4 1027.5 1021.5 1017.7 1018.4 1015.6 1014.7 1013.4 1020.3 1027.7 1026.2 1029.5 1029.5 DAY 4 18 4 4 12 12 3 30 30 21 30 18 MIN. QNH PRESSURE IN HPA 1009.5 1005.2 1002.4 1006.9 1003.7 1006.2 1007.4 1006.4 1009.8 1009.8 1006.9 1009.5 1002.4 DAY 14 8 15 9 29 20 15 15 8 18 12 14 MEAN QFF PRESSURE IN HPA 1020.7 1026.3 1013.3 1008.9 1007.8 1004.4 1001.6 1001.0 1010.9 1018.0 1018.1 1028.6 1013.3 MAX. QFF PRESSURE IN HPA 1029.7 1036.0 1023.6 1020.8 1015.2 1009.5 1005.8 1005.8 1018.1 1029.7 1030.3 1038.5 1038.5 DAY 4 18 4 4 12 15 3 31 30 21 30 18 MIN. QFF PRESSURE IN HPA 1013.2 1008.0 1002.2 1001.5 995.2 997.5 996.8 996.3 1003.7 1003.9 1004.7 1013.3 995.2 DAY 14 8 26 17 29 20 15 28 8 18 12 14 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 871.2 872.6 869.2 868.1 868.8 868.2 866.9 866.8 871.9 874.3 872.7 874.6 870.5 MAX. QFE PRESSURE IN HPA 879.4 881.4 876.6 873.8 873.5 871.6 869.6 870.2 875.7 881.6 879.9 882.5 882.5 DAY 4 18 28 13 12 15 3 30 30 21 30 18 MIN. QFE PRESSURE IN HPA 865.9 861.0 861.0 863.9 862.3 862.7 863.8 863.6 866.1 866.2 863.7 865.5 861.0 DAY 14 8 12 9 29 20 15 15 8 17 12 14 MEAN QNH PRESSURE IN HPA 1016.7 1018.4 1014.5 1013.2 1014.0 1013.4 1011.9 1011.7 1017.5 1020.3 1018.4 1020.6 1015.9 MAX. QNH PRESSURE IN HPA 1026.0 1028.3 1022.8 1019.7 1019.3 1017.2 1014.9 1015.6 1021.8 1028.5 1026.6 1029.5 1029.5 DAY 4 18 28 13 12 15 3 30 30 21 30 18 MIN. QNH PRESSURE IN HPA 1010.7 1005.2 1005.2 1008.4 1006.6 1007.1 1008.3 1008.1 1010.9 1011.0 1008.2 1010.3 1005.2 DAY 14 8 12 9 29 20 15 15 8 17 12 14 MEAN QFF PRESSURE IN HPA 1021.2 1025.8 1014.7 1009.7 1009.0 1005.1 1001.4 1001.8 1011.3 1017.9 1018.3 1028.3 1013.7 MAX. QFF PRESSURE IN HPA 1030.6 1036.9 1024.5 1020.5 1015.6 1011.2 1005.5 1007.3 1017.0 1030.1 1031.0 1038.8 1038.8 DAY 4 18 4 4 11 15 3 30 30 21 30 18 MIN. QFF PRESSURE IN HPA 1013.4 1007.8 1002.0 1002.5 997.6 997.7 997.3 997.2 1003.9 1004.1 1006.1 1013.3 997.2 DAY 8 8 26 17 29 20 15 28 8 18 13 14 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 871.9 874.2 872.5 874.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 875.3 881.6 880.1 882.3 ****** DAY ** ** ** ** ** ** ** ** 30 21 3 18 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 866.6 865.5 864.0 865.9 ****** DAY ** ** ** ** ** ** ** ** 8 17 12 14 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1017.5 1020.2 1018.1 1020.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1021.4 1028.5 1026.8 1029.3 ****** DAY ** ** ** ** ** ** ** ** 30 21 3 18 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1011.5 1010.3 1008.6 1010.7 ****** DAY ** ** ** ** ** ** ** ** 8 17 12 14 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1010.4 1017.0 1017.1 1026.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1016.1 1029.2 1030.7 1036.9 ****** DAY ** ** ** ** ** ** ** ** 30 21 30 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1003.8 1002.8 1006.4 1011.6 ****** DAY ** ** ** ** ** ** ** ** 8 17 13 14 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1985 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.9 2.9 3.1 13.5 18.4 24.4 25.1 21.4 19.9 12.2 8.9 2.0 12.6 MINIMUN AIR TEMPERATURE (C) -6.2 -2.5 -1.5 6.7 9.8 15.2 16.7 13.4 10.4 4.6 2.0 -1.9 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 19 11 11 0 0 0 0 0 0 0 0 8 49 DAYS WITH FREEZING MIN.<= 0 28 21 18 0 0 0 0 0 0 1 8 20 96 TEMPERATURE RECORDS LOWEST(C) -15.0 -9.4 -12.0 0.6 6.0 10.0 13.2 10.2 7.2 -0.4 -3.8 -13.0 -15.0 DAY 1 24 11 18 1 12 20 31 25 24 24 8 MAXIMUM AIR TEMPERATURE (C) 5.2 9.6 9.2 21.1 26.4 32.1 32.5 28.3 29.4 20.3 15.3 7.2 19.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 5 26 26 8 15 1 0 0 82 DAYS WITH MAXIMUM TEMP. <= 0 3 2 6 0 0 0 0 0 0 0 0 1 12 TEMPERATURE RECORDS HIGHEST(C) 11.8 19.0 21.6 30.4 32.4 38.0 37.2 31.8 33.2 32.4 23.4 18.8 38.0 DAY 29 15 20 24 17 26 5 7 2 1 4 1 DIF. BETWEEN (MAX.-MIN.) (C) 11.4 12.1 10.7 14.4 16.6 16.9 15.8 14.9 19.0 15.7 13.3 9.1 14.1 MEAN DAILY TEMP. (MDT) (C) -0.5 3.5 3.9 13.9 18.1 23.7 24.6 20.9 19.9 12.4 8.7 2.6 12.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.5 3.7 86.0 111.9 18.0 5.2 1.5 0.0 0.0 226.8 HEATING DEG. DAYS(BASE 18 0C) 573.6 405.1 438.5 132.4 28.3 0.0 0.0 1.7 3.6 177.1 280.3 476.0 2516.6 DEWPOINT (MEAN C) -5.3 -4.4 -3.4 4.2 4.7 7.4 9.9 6.2 2.3 1.6 0.2 -1.8 1.8 MIXING RATIO (G/KG) 3.11 3.29 3.78 6.10 6.39 7.77 9.22 7.02 5.55 5.07 4.60 3.99 5.49 VAPOUR PRESSURE (HPA) 4.32 4.55 5.25 8.42 8.82 10.68 12.65 9.70 7.70 7.05 6.40 5.55 7.59 SATURATION DEF. (HPA) 1.70 3.63 3.40 8.35 13.70 21.55 20.67 16.96 17.27 8.22 5.74 2.00 10.27 RELATIVE HUMIDITY (MEAN %) 74 63 65 59 45 38 43 42 36 53 59 79 55 RELATIVE HUMIDITY (MAX. %) 86 83 82 80 68 61 67 65 57 76 77 90 74 RELATIVE HUMIDITY (MIN. %) 58 40 45 37 26 22 25 23 18 32 43 65 36 RELATIVE HUMIDITY (MEAN% 03UTC) 83 77 80 76 65 57 65 63 55 71 76 85 71 RELATIVE HUMIDITY (MEAN% 09UTC) 64 49 50 44 30 25 28 27 22 36 46 67 41 RELATIVE HUMIDITY (MEAN% 15UTC) 73 57 61 53 37 28 32 30 27 51 60 82 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 40.5 56.0 27.5 30.4 9.1 11.0 0.0 10.4 0.0 6.3 1.6 54.8 247.6 DAYS WITH PRECIPITATION >=10 2 1 0 1 0 1 0 1 0 0 0 2 8 DAYS WITH PRECIPITATION >= 5 3 6 1 3 0 1 0 1 0 0 0 5 20 DAYS WITH PRECIPITATION >= 1 7 12 8 3 4 2 0 1 0 4 1 9 51 DAYS WITH PRECIPITATION 9 12 13 8 8 4 0 2 0 7 4 12 79 GREATEST DAILY PRECIPITATION 16.0 10.0 6.0 13.4 3.0 10.0 0.0 10.0 0.0 2.2 1.0 15.0 16.0 DAY 16 2 24 4 21 22 ** 18 ** 12 15 4 DAY WITH THUNDER STORM 0 0 1 4 4 2 0 1 0 1 0 1 14 DAYS WITH SNOW OR SLEET 6 11 9 0 0 0 0 0 0 0 0 7 33 DAYS WITH DUST 0 0 1 1 0 0 0 0 0 1 0 0 3 WIND DIRECTION (PREVAILING) 135 315 135 135 90 90 45 45 90 315 135 135 135 PREVAILING WIND SPEED(KNOTS) 5.6 7.5 7.0 8.2 5.8 7.1 8.5 8.3 6.1 7.7 6.9 5.8 6.8 PREVAILING WIND PERCENT 7.8 12.2 24.4 21.9 15.2 19.0 21.0 24.4 19.0 13.4 17.2 11.5 12.4 CALMS PERCENT OF WIND 78.8 50.0 31.3 30.5 38.2 24.3 25.2 31.3 38.1 48.8 63.4 68.2 43.9 NO. OF WIND OBSERVATION 217 196 217 210 217 210 214 217 210 217 186 217 2528 VECTOR WIND DIRECTION (MEAN) 164 237 179 160 62 65 57 31 98 182 157 167 95 VECTOR WIND MAGNITUDE(KNOTS) 0.2 1.2 1.6 1.3 1.0 2.2 2.8 2.5 2.0 0.5 0.7 0.8 0.7 WIND STEADINESES (MEAN %) 16.7 35.3 34.0 25.0 25.0 41.5 49.1 51.0 51.3 14.3 30.4 42.1 18.4 WIND SPEED (MEAN KNOTS) 1.2 3.4 4.7 5.2 4.0 5.3 5.7 4.9 3.9 3.5 2.3 1.9 3.8 FASTEST WIND DIRECTION 140 300 150 330 150 160 60 360 60 330 130 160 300 FASTEST WIND SPEED (KNOTS) 12 21 16 16 14 12 14 16 12 14 12 12 21 DAY 2 6 1 13 21 2 9 18 4 1 1 4 DAYS WITH SKY CLEAR (0-2)/8 13 11 5 10 18 24 30 26 30 20 15 9 211 DAYS WITH P.CLOUDY (3-6)/8 6 7 14 13 12 6 1 5 0 9 12 12 97 DAYS WITH CLOUDY (7-8)/8 12 10 12 7 1 0 0 0 0 2 3 10 57 DAYS WITH VISIBILITY =< 2 KM 4 2 2 1 0 0 0 0 0 0 1 5 15 DURATION OF SUNSHINE HOURS 127.0 167.9 165.8 197.6 302.9 331.3 352.4 350.7 302.5 244.2 201.8 117.1 2861.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 870.1 864.4 871.5 867.9 869.1 866.7 867.0 869.4 870.6 872.7 873.6 871.1 869.5 MAX. QFE PRESSURE IN HPA 877.4 874.4 882.2 880.4 877.6 871.8 871.2 873.5 879.0 881.3 880.3 879.4 882.2 DAY-HOUR 14-15 24- 6 5-18 17- 6 12-18 10- 3 15-18 31- 6 22- 6 31-18 1- 0 9- 6 MIN. QFE PRESSURE IN HPA 861.0 851.4 855.8 861.3 862.4 860.9 861.8 864.6 864.4 865.6 869.2 857.5 851.4 DAY-HOUR 2-18 2- 0 24-12 24-15 4-15 20-12 27-12 8-12 7-12 10-18 10-12 19- 3 MEAN QNH PRESSURE IN HPA 1015.5 1009.1 1017.0 1013.0 1014.3 1011.6 1011.9 1014.6 1016.0 1018.4 1019.4 1016.6 1014.8 MAX. QNH PRESSURE IN HPA 1023.7 1020.3 1029.2 1027.1 1024.0 1017.4 1016.7 1019.3 1025.6 1028.2 1027.0 1026.0 1029.2 DAY-HOUR 14-15 24- 6 5-18 17- 6 12-18 10- 3 15-18 31- 6 22- 6 31-18 1- 0 9- 6 MIN. QNH PRESSURE IN HPA 1005.2 994.3 999.3 1005.5 1006.7 1005.0 1006.1 1009.2 1009.0 1010.4 1014.4 1001.2 994.3 DAY-HOUR 2-18 2- 0 24-12 24-15 4-15 20-12 27-12 8-12 7-12 10-18 10-12 19- 3 MEAN QFF PRESSURE IN HPA 1020.2 1011.2 1019.4 1009.4 1008.2 1002.3 1002.2 1006.9 1009.4 1015.8 1018.2 1019.5 1011.9 MAX. QFF PRESSURE IN HPA 1029.3 1028.1 1037.8 1028.7 1019.1 1010.7 1008.0 1013.7 1020.4 1028.7 1028.1 1033.0 1037.8 DAY-HOUR 18- 6 24- 6 5- 6 17- 3 12-18 10- 3 29- 6 31- 3 22- 3 31-18 1- 6 10- 3 MIN. QFF PRESSURE IN HPA 1007.6 992.9 994.7 997.9 1000.4 995.0 995.5 999.9 1000.2 1004.7 1010.4 1000.4 992.9 DAY-HOUR 3- 0 26-18 24-12 24-12 4-12 8-12 27-12 8-12 7-12 10-18 10-12 19- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 869.8 864.0 871.2 867.8 869.0 866.6 867.1 869.3 870.7 872.7 872.9 870.7 869.3 MAX. QFE PRESSURE IN HPA 875.5 872.3 881.9 879.1 876.4 871.2 870.6 872.9 877.1 877.7 880.3 877.9 881.9 DAY 28 24 6 17 13 10 16 31 22 7 1 9 MIN. QFE PRESSURE IN HPA 861.2 851.4 860.8 864.0 863.9 862.1 862.6 865.6 866.1 866.9 869.8 858.8 851.4 DAY 3 2 25 4 4 20 20 8 7 11 27 19 MEAN QNH PRESSURE IN HPA 1015.1 1008.5 1016.7 1012.9 1014.2 1011.5 1012.1 1014.6 1016.2 1018.4 1018.6 1016.1 1014.6 MAX. QNH PRESSURE IN HPA 1021.6 1018.0 1028.8 1025.7 1022.6 1016.7 1016.0 1018.6 1023.4 1024.1 1027.0 1024.3 1028.8 DAY 28 24 6 17 13 10 16 31 22 7 1 9 MIN. QNH PRESSURE IN HPA 1005.4 994.3 1004.9 1008.6 1008.4 1006.4 1007.0 1010.4 1010.9 1011.8 1015.1 1002.7 994.3 DAY 3 2 25 4 4 20 20 8 7 11 27 19 MEAN QFF PRESSURE IN HPA 1019.1 1010.0 1018.5 1008.8 1008.0 1002.1 1002.1 1006.6 1008.8 1014.9 1016.4 1018.4 1011.1 MAX. QFF PRESSURE IN HPA 1027.0 1024.8 1035.2 1027.4 1017.7 1009.7 1005.7 1011.9 1017.5 1021.3 1026.5 1030.1 1035.2 DAY 18 24 5 17 12 10 18 31 23 7 1 9 MIN. QFF PRESSURE IN HPA 1007.6 993.1 1001.5 1000.8 1001.9 996.3 998.2 1000.6 1002.8 1005.6 1011.7 1003.1 993.1 DAY 3 2 25 25 4 21 20 8 7 11 11 19 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 869.7 864.3 871.6 868.2 869.6 867.4 867.8 869.9 871.4 873.0 874.2 871.1 869.9 MAX. QFE PRESSURE IN HPA 875.3 873.2 881.9 879.9 876.4 871.8 871.2 873.3 878.1 878.1 880.3 878.3 881.9 DAY 28 24 6 17 13 10 16 31 22 7 1 9 MIN. QFE PRESSURE IN HPA 863.0 853.7 860.1 863.4 864.7 862.5 862.9 866.1 866.4 866.4 870.6 857.5 853.7 DAY 3 6 24 4 1 21 20 8 7 11 11 19 MEAN QNH PRESSURE IN HPA 1015.0 1008.9 1017.2 1013.4 1014.9 1012.4 1012.8 1015.3 1016.9 1018.8 1020.1 1016.6 1015.2 MAX. QNH PRESSURE IN HPA 1021.4 1019.0 1028.8 1026.6 1022.6 1017.4 1016.7 1019.1 1024.5 1024.5 1027.0 1024.8 1028.8 DAY 28 24 6 17 13 10 16 31 22 7 1 9 MIN. QNH PRESSURE IN HPA 1007.4 996.9 1004.1 1007.9 1009.3 1006.9 1007.3 1010.9 1011.3 1011.3 1016.0 1001.2 996.9 DAY 3 6 24 4 1 21 20 8 7 11 11 19 MEAN QFF PRESSURE IN HPA 1020.6 1011.6 1020.2 1010.3 1009.4 1003.6 1003.4 1008.1 1011.3 1017.1 1020.7 1019.9 1013.0 MAX. QFF PRESSURE IN HPA 1028.8 1027.2 1036.8 1028.7 1018.9 1010.7 1007.3 1013.7 1020.4 1023.7 1028.0 1033.0 1036.8 DAY 18 24 5 17 12 10 16 31 22 7 18 10 MIN. QFF PRESSURE IN HPA 1010.0 996.3 1002.0 1002.1 1004.3 997.1 999.4 1002.1 1005.0 1006.3 1014.5 1000.4 996.3 DAY 3 6 24 25 21 21 20 8 7 11 11 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 870.9 865.3 872.4 868.7 869.8 867.6 867.8 870.2 871.7 873.5 874.9 872.1 870.4 MAX. QFE PRESSURE IN HPA 876.3 874.4 882.2 880.4 876.9 871.6 871.2 873.5 879.0 879.2 880.1 879.4 882.2 DAY 14 24 6 17 12 6 16 31 22 31 1 9 MIN. QFE PRESSURE IN HPA 865.9 854.1 859.2 865.0 864.4 862.7 863.2 866.1 866.8 867.0 871.3 859.3 854.1 DAY 19 6 24 15 1 20 20 8 7 11 8 19 MEAN QNH PRESSURE IN HPA 1016.4 1010.0 1018.1 1013.9 1015.2 1012.6 1012.9 1015.6 1017.3 1019.3 1020.9 1017.7 1015.8 MAX. QNH PRESSURE IN HPA 1022.5 1020.3 1029.2 1027.1 1023.2 1017.2 1016.7 1019.3 1025.6 1025.8 1026.8 1026.0 1029.2 DAY 14 24 6 17 12 6 16 31 22 31 1 9 MIN. QNH PRESSURE IN HPA 1010.7 997.3 1003.1 1009.7 1009.0 1007.1 1007.6 1010.9 1011.7 1012.0 1016.8 1003.2 997.3 DAY 19 6 24 15 1 20 20 8 7 11 8 19 MEAN QFF PRESSURE IN HPA 1021.5 1012.3 1020.8 1010.2 1008.7 1003.0 1002.9 1007.5 1010.3 1016.4 1018.4 1020.6 1012.7 MAX. QFF PRESSURE IN HPA 1029.3 1028.1 1037.8 1028.7 1018.8 1009.8 1008.0 1012.5 1020.3 1025.4 1028.1 1032.2 1037.8 DAY 18 24 5 17 12 10 29 30 22 31 1 8 MIN. QFF PRESSURE IN HPA 1013.6 996.6 1001.2 1002.5 1001.8 996.2 998.5 1001.4 1004.1 1006.3 1014.5 1001.6 996.2 DAY 11 6 24 25 21 21 20 8 7 11 8 19 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 870.2 864.7 871.7 867.9 868.9 866.6 866.8 869.3 870.4 872.3 873.7 871.1 869.5 MAX. QFE PRESSURE IN HPA 876.9 874.1 882.1 879.5 876.6 871.1 870.2 872.2 877.7 879.1 878.3 878.8 882.1 DAY 14 24 5 17 12 6 16 13 22 31 19 9 MIN. QFE PRESSURE IN HPA 864.9 853.0 857.5 863.6 862.8 861.9 863.0 865.4 865.5 866.0 870.0 858.7 853.0 DAY 2 6 24 24 1 20 20 8 7 28 8 19 MEAN QNH PRESSURE IN HPA 1015.6 1009.4 1017.3 1013.0 1014.2 1011.5 1011.7 1014.6 1015.8 1017.9 1019.5 1016.6 1014.8 MAX. QNH PRESSURE IN HPA 1023.2 1020.0 1029.1 1026.1 1022.8 1016.6 1015.6 1017.9 1024.1 1025.7 1024.8 1025.3 1029.1 DAY 14 24 5 17 12 6 16 13 22 31 19 9 MIN. QNH PRESSURE IN HPA 1009.6 996.1 1001.2 1008.1 1007.2 1006.2 1007.4 1010.1 1010.3 1010.8 1015.4 1002.5 996.1 DAY 2 6 24 24 1 20 20 8 7 28 8 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 869.7 863.8 870.5 867.0 868.1 865.6 865.9 868.5 869.2 871.5 872.8 870.6 868.6 MAX. QFE PRESSURE IN HPA 876.8 873.3 881.2 877.5 875.7 870.0 869.2 872.3 876.4 878.9 878.2 878.3 881.2 DAY 14 24 5 17 12 6 16 18 22 31 17 14 MIN. QFE PRESSURE IN HPA 863.1 853.8 855.8 861.9 862.5 860.9 861.8 864.6 864.4 865.9 869.2 859.0 853.8 DAY 2 6 24 24 1 20 27 8 7 10 10 19 MEAN QNH PRESSURE IN HPA 1015.0 1008.4 1015.9 1012.0 1013.2 1010.4 1010.7 1013.7 1014.5 1017.1 1018.5 1016.0 1013.8 MAX. QNH PRESSURE IN HPA 1023.1 1019.1 1028.0 1023.9 1021.8 1015.4 1014.4 1018.0 1022.6 1025.4 1024.7 1024.8 1028.0 DAY 14 24 5 17 12 6 16 18 22 31 17 14 MIN. QNH PRESSURE IN HPA 1007.5 997.0 999.3 1006.2 1006.9 1005.0 1006.1 1009.2 1009.0 1010.7 1014.4 1002.9 997.0 DAY 2 6 24 24 1 20 27 8 7 10 10 19 MEAN QFF PRESSURE IN HPA 1018.8 1009.9 1017.5 1007.9 1006.8 1001.0 1000.7 1005.8 1007.1 1013.7 1014.8 1018.3 1010.2 MAX. QFF PRESSURE IN HPA 1025.8 1026.2 1034.8 1023.4 1017.0 1007.1 1005.3 1012.0 1016.8 1024.1 1020.2 1030.3 1034.8 DAY 14 24 5 17 12 10 29 18 22 31 1 8 MIN. QFF PRESSURE IN HPA 1012.0 996.4 994.7 997.9 1000.4 995.0 995.5 999.9 1000.2 1006.5 1010.4 1001.0 994.7 DAY 2 16 24 24 4 8 27 8 7 10 10 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 870.1 864.3 871.0 867.3 868.4 865.9 866.0 868.7 869.8 872.5 873.4 871.2 869.0 MAX. QFE PRESSURE IN HPA 877.4 873.5 881.4 878.1 876.1 869.5 869.2 872.3 877.0 879.9 879.2 878.7 881.4 DAY 14 24 5 17 12 6 15 30 22 31 17 14 MIN. QFE PRESSURE IN HPA 862.1 853.0 859.8 861.3 862.4 861.2 861.9 864.9 865.4 865.9 869.5 860.3 853.0 DAY 2 26 24 24 4 19 27 8 6 10 26 19 MEAN QNH PRESSURE IN HPA 1015.5 1008.9 1016.5 1012.3 1013.5 1010.7 1010.9 1013.9 1015.1 1018.1 1019.2 1016.7 1014.3 MAX. QNH PRESSURE IN HPA 1023.7 1019.3 1028.3 1024.5 1022.3 1014.8 1014.4 1018.0 1023.3 1026.6 1025.8 1025.2 1028.3 DAY 14 24 5 17 12 6 15 30 22 31 17 14 MIN. QNH PRESSURE IN HPA 1006.4 996.1 1003.8 1005.5 1006.7 1005.4 1006.2 1009.6 1010.1 1010.7 1014.8 1004.4 996.1 DAY 2 26 24 24 4 19 27 8 6 10 26 19 MEAN QFF PRESSURE IN HPA 1020.8 1011.6 1019.3 1009.1 1007.9 1002.0 1001.6 1006.8 1009.5 1016.5 1019.7 1020.0 1012.1 MAX. QFF PRESSURE IN HPA 1029.2 1027.2 1036.0 1025.6 1018.4 1007.9 1006.3 1012.4 1019.2 1027.4 1027.6 1032.8 1036.0 DAY 25 24 5 17 12 10 29 30 22 31 17 9 MIN. QFF PRESSURE IN HPA 1010.7 994.1 1002.3 998.0 1002.1 995.8 997.0 1001.4 1003.7 1007.7 1013.7 1001.8 994.1 DAY 2 26 20 24 4 20 27 8 7 10 10 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 870.3 864.8 871.8 868.5 869.7 867.1 867.5 869.7 871.0 873.4 872.7 871.3 869.8 MAX. QFE PRESSURE IN HPA 876.5 873.8 882.2 879.4 877.6 871.2 871.2 873.3 878.1 881.3 875.0 878.7 882.2 DAY 14 24 5 16 12 9 15 30 22 31 4 14 MIN. QFE PRESSURE IN HPA 861.0 852.1 860.7 863.6 864.7 862.5 863.7 866.4 866.2 865.6 869.9 860.3 852.1 DAY 2 26 24 24 1 19 19 5 6 10 26 19 MEAN QNH PRESSURE IN HPA 1015.7 1009.4 1017.4 1013.7 1015.0 1012.0 1012.5 1015.1 1016.5 1019.2 1018.5 1016.9 1015.2 MAX. QNH PRESSURE IN HPA 1022.7 1019.7 1029.2 1026.0 1024.0 1016.7 1016.7 1019.1 1024.5 1028.2 1021.0 1025.2 1029.2 DAY 14 24 5 16 12 9 15 30 22 31 4 14 MIN. QNH PRESSURE IN HPA 1005.2 995.1 1004.8 1008.1 1009.3 1006.9 1008.2 1011.3 1011.0 1010.4 1015.2 1004.4 995.1 DAY 2 26 24 24 1 19 19 5 6 10 26 19 MEAN QFF PRESSURE IN HPA 1020.5 1011.7 1020.0 1010.0 1008.6 1002.5 1002.5 1007.0 1009.5 1016.5 1017.1 1019.8 1012.1 MAX. QFF PRESSURE IN HPA 1027.8 1026.8 1037.2 1027.3 1019.1 1009.9 1007.0 1012.6 1019.2 1028.7 1021.3 1032.0 1037.2 DAY 25 24 4 17 12 9 16 30 22 31 1 9 MIN. QFF PRESSURE IN HPA 1008.3 992.9 1003.7 1000.6 1002.6 996.3 998.4 1001.7 1003.5 1004.7 1012.6 1001.4 992.9 DAY 2 26 24 24 31 20 26 5 6 10 10 19 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1986 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.2 1.7 1.9 11.9 20.5 24.0 26.6 24.2 21.3 16.7 7.4 2.2 13.2 MINIMUN AIR TEMPERATURE (C) -5.6 -3.3 -2.3 5.7 11.4 13.4 15.8 12.9 9.9 7.8 1.0 -2.7 5.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 13 12 14 0 0 0 0 0 0 0 5 12 56 DAYS WITH FREEZING MIN.<= 0 28 24 25 1 0 0 0 0 0 2 15 24 119 TEMPERATURE RECORDS LOWEST(C) -16.2 -13.6 -7.0 -0.4 7.0 9.6 11.4 9.4 6.0 -0.6 -8.2 -11.0 -16.2 DAY 25 14 17 1 19 11 23 10 4 18 14 13 MAXIMUM AIR TEMPERATURE (C) 7.8 7.5 6.6 17.7 26.1 29.5 31.9 29.8 28.0 23.2 12.3 6.8 18.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 3 12 28 18 6 2 0 0 69 DAYS WITH MAXIMUM TEMP. <= 0 3 4 2 0 0 0 0 0 0 0 0 3 12 TEMPERATURE RECORDS HIGHEST(C) 14.4 18.6 15.8 26.2 30.8 34.6 35.2 34.0 34.6 31.6 25.0 13.8 35.2 DAY 18 27 7 16 23 30 17 15 25 5 4 1 DIF. BETWEEN (MAX.-MIN.) (C) 13.4 10.8 8.9 12.0 14.7 16.1 16.1 16.9 18.1 15.4 11.3 9.5 13.6 MEAN DAILY TEMP. (MDT) (C) 1.1 2.1 2.1 11.7 18.7 21.4 23.8 21.4 19.0 15.5 6.7 2.1 12.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 7.0 25.4 91.6 29.7 9.1 0.5 0.0 0.0 163.3 HEATING DEG. DAYS(BASE 18 0C) 524.4 445.5 473.8 188.5 18.3 0.0 0.0 0.0 14.5 88.2 339.4 494.3 2586.9 DEWPOINT (MEAN C) -4.8 -2.3 -3.2 3.1 6.6 6.0 6.7 4.2 3.0 5.1 -1.0 -2.0 1.8 MIXING RATIO (G/KG) 3.28 3.83 3.57 5.78 7.24 6.92 7.49 6.29 5.83 6.50 4.26 3.98 5.41 VAPOUR PRESSURE (HPA) 4.57 5.31 4.96 8.00 9.98 9.52 10.32 8.69 8.09 9.03 5.92 5.52 7.49 SATURATION DEF. (HPA) 2.31 2.14 2.36 6.55 15.10 21.41 25.80 22.90 19.00 11.27 5.56 2.03 11.37 RELATIVE HUMIDITY (MEAN %) 72 77 73 60 45 34 33 32 35 50 59 76 54 RELATIVE HUMIDITY (MAX. %) 88 91 89 79 68 57 55 55 60 76 79 89 74 RELATIVE HUMIDITY (MIN. %) 52 58 55 43 29 23 22 20 21 33 44 61 38 RELATIVE HUMIDITY (MEAN% 03UTC) 82 88 87 76 68 57 55 55 60 76 77 88 72 RELATIVE HUMIDITY (MEAN% 09UTC) 57 62 60 47 35 26 24 22 24 36 46 66 42 RELATIVE HUMIDITY (MEAN% 15UTC) 77 80 72 58 41 29 27 27 34 51 64 80 53 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 21.0 39.2 38.3 49.2 14.8 4.7 2.0 10.3 1.2 2.2 7.7 68.1 258.7 DAYS WITH PRECIPITATION >=10 0 2 1 1 0 0 0 0 0 0 0 2 6 DAYS WITH PRECIPITATION >= 5 2 3 4 3 1 0 0 1 0 0 1 6 21 DAYS WITH PRECIPITATION >= 1 3 5 7 8 4 1 1 2 1 2 2 8 44 DAYS WITH PRECIPITATION 7 9 16 12 9 5 2 3 3 4 7 11 88 GREATEST DAILY PRECIPITATION 9.0 17.0 13.0 19.0 5.0 4.0 2.0 8.0 1.0 1.0 5.0 23.0 23.0 DAY 21 11 8 21 5 3 21 5 18 6 21 2 DAY WITH THUNDER STORM 0 0 0 3 7 4 0 2 0 1 1 2 20 DAYS WITH SNOW OR SLEET 4 10 12 0 0 0 0 0 0 0 2 7 35 DAYS WITH DUST 0 0 0 0 0 1 2 0 1 1 0 0 5 WIND DIRECTION (PREVAILING) 270 135 315 135 135 45 45 90 45 135 135 315 135 PREVAILING WIND SPEED(KNOTS) 6.8 5.4 6.2 7.2 7.2 8.3 8.9 8.2 8.4 7.0 5.8 6.1 6.8 PREVAILING WIND PERCENT 5.5 15.3 27.3 30.0 16.8 18.7 27.7 25.8 18.0 19.4 26.7 13.5 14.3 CALMS PERCENT OF WIND 81.6 71.9 32.0 29.5 34.8 30.0 21.3 26.5 35.3 41.3 33.3 65.2 43.4 NO. OF WIND OBSERVATION 217 196 194 190 155 150 155 155 150 155 150 155 2022 VECTOR WIND DIRECTION (MEAN) 278 136 195 124 164 84 58 55 49 229 189 273 87 VECTOR WIND MAGNITUDE(KNOTS) 0.5 0.7 0.6 2.4 0.9 2.8 3.7 3.1 1.7 0.7 0.9 0.6 0.9 WIND STEADINESES (MEAN %) 45.5 46.7 13.0 49.0 20.5 53.8 59.7 56.4 37.8 18.4 22.0 30.0 22.5 WIND SPEED (MEAN KNOTS) 1.1 1.5 4.6 4.9 4.4 5.2 6.2 5.5 4.5 3.8 4.1 2.0 4.0 FASTEST WIND DIRECTION 310 150 160 150 150 60 60 60 300 160 300 310 300 FASTEST WIND SPEED (KNOTS) 12 10 14 14 16 16 14 14 16 16 19 14 19 DAY 21 28 3 19 13 19 2 14 17 8 15 10 DAYS WITH SKY CLEAR (0-2)/8 18 10 7 9 14 20 27 29 25 15 5 13 192 DAYS WITH P.CLOUDY (3-6)/8 9 10 13 8 15 10 3 2 4 16 15 10 115 DAYS WITH CLOUDY (7-8)/8 4 8 11 13 2 0 1 0 1 0 10 8 58 DAYS WITH VISIBILITY =< 2 KM 3 2 1 2 1 0 0 0 0 0 0 0 9 DURATION OF SUNSHINE HOURS 173.5 152.4 146.5 175.4 286.5 318.9 343.6 354.9 285.6 229.1 129.1 146.8 2742.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 870.5 869.3 871.2 870.6 868.8 865.9 868.3 869.6 872.4 873.7 872.4 870.8 870.3 MAX. QFE PRESSURE IN HPA 878.9 876.8 879.0 879.0 876.3 871.9 872.6 872.8 877.4 880.7 879.7 883.5 883.5 DAY-HOUR 28-18 22- 6 3- 6 5- 6 19- 6 3- 6 3- 6 24- 3 22- 6 15- 6 16- 6 7- 3 MIN. QFE PRESSURE IN HPA 857.1 862.6 863.6 863.3 862.4 860.6 863.0 864.4 867.7 867.9 864.3 860.4 857.1 DAY-HOUR 20- 9 16- 0 10- 3 11-15 10-15 18-12 20-12 6-15 26-12 5-12 7-12 31- 3 MEAN QNH PRESSURE IN HPA 1016.0 1014.5 1016.7 1016.0 1014.0 1010.7 1013.5 1014.9 1018.1 1019.6 1018.0 1016.3 1015.7 MAX. QNH PRESSURE IN HPA 1025.4 1023.1 1025.6 1025.6 1022.5 1017.5 1018.3 1018.5 1023.7 1027.5 1026.4 1030.7 1030.7 DAY-HOUR 28-18 22- 6 3- 6 5- 6 19- 6 3- 6 3- 6 24- 3 22- 6 15- 6 16- 6 7- 3 MIN. QNH PRESSURE IN HPA 1000.7 1007.0 1008.1 1007.8 1006.7 1004.7 1007.4 1009.0 1012.8 1013.0 1008.9 1004.5 1000.7 DAY-HOUR 20- 9 16- 0 10- 3 11-15 10-15 18-12 20-12 6-15 26-12 5-12 7-12 31- 3 MEAN QFF PRESSURE IN HPA 1020.2 1017.6 1020.0 1013.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1036.9 1027.8 1029.2 1024.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 28-15 13-18 3- 3 5- 3 **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1002.1 1007.5 1009.8 1004.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR 20- 0 7- 0 9-15 11-15 **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 870.3 868.9 871.2 870.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 878.1 874.1 875.9 878.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 29 23 30 5 ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 858.3 862.6 865.6 863.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 20 16 25 12 ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1015.7 1014.1 1016.8 1015.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1024.5 1020.0 1022.0 1024.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 29 23 30 5 ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1002.1 1007.0 1010.4 1008.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 20 16 25 12 ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1018.9 1016.5 1019.4 1012.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.2 1026.1 1026.0 1022.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 29 14 17 5 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1002.1 1007.5 1011.7 1004.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 20 7 25 11 ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 870.5 869.3 871.2 870.9 869.5 866.6 869.0 870.3 873.1 874.4 872.6 870.7 870.7 MAX. QFE PRESSURE IN HPA 878.0 875.4 877.5 878.5 876.2 871.6 872.0 872.8 876.7 879.8 879.0 883.5 883.5 DAY 29 22 3 5 19 3 3 24 22 15 16 7 MIN. QFE PRESSURE IN HPA 857.8 862.7 863.6 864.5 863.2 863.1 865.9 867.0 869.9 870.8 865.1 860.4 857.8 DAY 20 16 10 11 3 18 20 6 4 23 11 31 MEAN QNH PRESSURE IN HPA 1015.9 1014.6 1016.7 1016.4 1014.7 1011.5 1014.2 1015.7 1018.9 1020.3 1018.2 1016.2 1016.1 MAX. QNH PRESSURE IN HPA 1024.4 1021.5 1023.9 1025.0 1022.4 1017.2 1017.6 1018.5 1022.9 1026.5 1025.6 1030.7 1030.7 DAY 29 22 3 5 19 3 3 24 22 15 16 7 MIN. QNH PRESSURE IN HPA 1001.5 1007.1 1008.1 1009.1 1007.6 1007.5 1010.7 1012.0 1015.2 1016.3 1009.8 1004.5 1001.5 DAY 20 16 10 11 3 18 20 6 4 23 11 31 MEAN QFF PRESSURE IN HPA 1021.0 1018.5 1020.1 1014.6 1008.7 1003.8 1005.2 1008.3 1013.5 1017.2 1019.6 1019.9 1014.2 MAX. QFF PRESSURE IN HPA 1035.0 1027.5 1029.2 1024.2 1019.0 1011.0 1010.4 1012.1 1017.8 1025.1 1030.8 1035.4 1035.4 DAY 28 14 3 5 19 3 22 31 22 15 16 7 MIN. QFF PRESSURE IN HPA 1002.6 1009.9 1010.5 1005.2 1000.8 998.7 1001.1 1004.1 1008.5 1010.8 1006.6 1005.1 998.7 DAY 20 16 10 11 3 18 20 15 26 5 11 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.6 870.2 872.1 871.3 869.8 866.6 869.1 870.4 873.5 875.0 873.4 871.9 871.2 MAX. QFE PRESSURE IN HPA 878.6 876.8 879.0 879.0 876.3 871.9 872.6 872.8 877.4 880.7 879.7 883.5 883.5 DAY 28 22 3 5 19 3 3 24 22 15 16 7 MIN. QFE PRESSURE IN HPA 858.8 863.9 865.6 865.1 863.7 862.0 865.7 867.0 869.6 870.7 866.2 863.2 858.8 DAY 20 16 10 11 3 18 20 15 6 5 8 31 MEAN QNH PRESSURE IN HPA 1017.1 1015.6 1017.7 1016.9 1015.1 1011.5 1014.4 1015.8 1019.3 1021.0 1019.2 1017.5 1016.7 MAX. QNH PRESSURE IN HPA 1025.1 1023.1 1025.6 1025.6 1022.5 1017.5 1018.3 1018.5 1023.7 1027.5 1026.4 1030.7 1030.7 DAY 28 22 3 5 19 3 3 24 22 15 16 7 MIN. QNH PRESSURE IN HPA 1002.7 1008.4 1010.4 1009.8 1008.2 1006.3 1010.5 1012.0 1014.9 1016.1 1011.0 1007.6 1002.7 DAY 20 16 10 11 3 18 20 15 6 5 8 31 MEAN QFF PRESSURE IN HPA 1021.4 1018.9 1021.8 1014.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1034.5 1026.0 1027.9 1024.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 28 14 17 5 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1003.2 1010.2 1013.9 1006.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 20 26 25 11 ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 870.4 869.5 871.2 870.5 868.7 865.7 868.2 869.4 872.2 873.5 872.0 870.7 870.2 MAX. QFE PRESSURE IN HPA 878.7 876.3 876.8 878.0 875.8 871.1 871.9 872.0 876.1 878.7 879.0 881.0 881.0 DAY 28 22 3 5 19 2 3 24 22 15 16 7 MIN. QFE PRESSURE IN HPA 857.1 864.1 865.6 864.4 863.0 861.8 864.3 866.0 868.5 868.1 865.1 863.1 857.1 DAY 20 16 10 11 3 18 20 6 26 5 9 30 MEAN QNH PRESSURE IN HPA 1015.8 1014.8 1016.8 1015.9 1013.9 1010.5 1013.4 1014.7 1017.9 1019.3 1017.7 1016.1 1015.6 MAX. QNH PRESSURE IN HPA 1025.2 1022.5 1023.1 1024.4 1021.9 1016.6 1017.5 1017.6 1022.3 1025.2 1025.6 1027.8 1027.8 DAY 28 22 3 5 19 2 3 24 22 15 16 7 MIN. QNH PRESSURE IN HPA 1000.7 1008.7 1010.4 1009.0 1007.4 1006.1 1008.9 1010.8 1013.7 1013.2 1009.8 1007.5 1000.7 DAY 20 16 10 11 3 18 20 6 26 5 9 30 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 869.9 868.7 870.2 869.7 867.9 865.1 867.6 868.8 871.4 872.6 871.6 870.2 869.5 MAX. QFE PRESSURE IN HPA 878.2 875.5 875.8 876.4 874.9 871.3 871.2 871.2 875.0 877.8 879.1 879.0 879.1 DAY 28 22 3 5 19 2 3 17 22 15 21 7 MIN. QFE PRESSURE IN HPA 857.7 864.2 864.4 863.7 862.7 860.6 863.0 864.8 867.7 867.9 864.3 862.1 857.7 DAY 20 16 9 11 10 18 20 6 26 5 7 30 MEAN QNH PRESSURE IN HPA 1015.2 1013.8 1015.5 1015.1 1013.0 1009.7 1012.6 1014.0 1017.0 1018.3 1017.2 1015.5 1014.7 MAX. QNH PRESSURE IN HPA 1024.7 1021.6 1021.9 1022.6 1020.9 1016.8 1016.7 1016.7 1021.0 1024.2 1025.7 1025.6 1025.7 DAY 28 22 3 5 19 2 3 17 22 15 21 7 MIN. QNH PRESSURE IN HPA 1001.4 1008.8 1009.0 1008.2 1007.1 1004.7 1007.4 1009.5 1012.8 1013.0 1008.9 1006.4 1001.4 DAY 20 16 9 11 10 18 20 6 26 5 7 30 MEAN QFF PRESSURE IN HPA 1018.3 1016.0 1018.5 1011.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.4 1024.6 1023.3 1020.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 28 13 17 5 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1003.3 1008.1 1011.8 1004.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 20 26 1 11 ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 870.5 869.1 870.7 870.3 868.4 865.4 867.8 869.2 872.0 873.3 872.3 870.6 870.0 MAX. QFE PRESSURE IN HPA 878.7 875.0 876.2 876.8 875.4 871.6 871.4 871.7 875.4 878.7 879.6 881.2 881.2 DAY 28 22 27 5 19 2 3 31 22 14 15 6 MIN. QFE PRESSURE IN HPA 860.2 864.0 863.7 863.3 862.4 860.9 864.2 864.4 869.0 868.8 864.9 860.6 860.2 DAY 19 6 9 11 10 17 20 6 6 6 7 20 MEAN QNH PRESSURE IN HPA 1015.9 1014.3 1016.1 1015.7 1013.6 1010.1 1012.9 1014.4 1017.6 1019.1 1017.9 1016.1 1015.3 MAX. QNH PRESSURE IN HPA 1025.2 1021.0 1022.4 1023.1 1021.5 1017.2 1016.9 1017.3 1021.5 1025.2 1026.2 1028.0 1028.0 DAY 28 22 27 5 19 2 3 31 22 14 15 6 MIN. QNH PRESSURE IN HPA 1004.2 1008.6 1008.2 1007.8 1006.7 1005.0 1008.8 1009.0 1014.2 1014.0 1009.6 1004.7 1004.2 DAY 19 6 9 11 10 17 20 6 6 6 7 20 MEAN QFF PRESSURE IN HPA 1020.9 1018.0 1019.6 1013.8 1007.5 1002.5 1004.0 1007.2 1012.3 1015.8 1019.3 1019.9 1013.4 MAX. QFF PRESSURE IN HPA 1036.9 1027.7 1026.6 1021.6 1018.0 1010.0 1007.9 1011.9 1017.4 1023.0 1031.2 1033.1 1036.9 DAY 28 13 3 5 18 2 3 31 30 14 16 6 MIN. QFF PRESSURE IN HPA 1006.2 1009.8 1009.8 1004.2 999.2 996.5 998.8 1001.8 1007.4 1008.7 1007.3 1005.5 996.5 DAY 19 6 9 11 10 18 20 6 25 6 7 30 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 870.7 869.5 872.0 871.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 878.9 875.4 876.8 877.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 28 22 27 4 ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA 860.6 864.5 866.6 864.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 19 6 24 11 ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1016.2 1014.8 1017.6 1016.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1025.4 1021.5 1023.1 1024.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 28 22 27 4 ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1004.7 1009.1 1011.5 1008.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 19 6 24 11 ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1020.5 1017.9 1021.1 1013.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1034.4 1027.8 1026.4 1022.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 28 13 16 4 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1005.6 1010.2 1014.1 1005.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY 19 26 24 11 ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.2 4.5 7.2 12.9 20.9 24.8 25.5 26.1 20.2 9.8 9.0 5.6 14.2 MINIMUN AIR TEMPERATURE (C) -1.8 -1.8 2.6 5.4 11.7 13.5 16.0 16.3 11.6 3.4 2.0 -1.7 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 6 5 1 0 0 0 0 0 0 0 1 9 22 DAYS WITH FREEZING MIN.<= 0 25 20 8 5 0 0 0 0 0 8 9 22 97 TEMPERATURE RECORDS LOWEST(C) -7.2 -10.8 -4.6 -1.6 3.4 8.2 10.6 9.4 7.0 -2.8 -4.6 -7.4 -10.8 DAY 22 12 23 2 7 22 5 31 25 16 30 3 MAXIMUM AIR TEMPERATURE (C) 9.4 9.4 11.1 18.2 26.0 29.6 30.7 31.7 26.4 14.5 14.3 11.2 19.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 6 16 19 23 4 0 0 0 68 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 2 2 4 TEMPERATURE RECORDS HIGHEST(C) 16.4 19.0 19.6 27.2 34.2 34.0 36.4 35.2 35.8 26.6 25.4 19.4 36.4 DAY 26 4 9 26 24 18 8 15 6 2 7 20 DIF. BETWEEN (MAX.-MIN.) (C) 11.2 11.2 8.5 12.8 14.3 16.1 14.7 15.4 14.8 11.1 12.3 12.9 13.0 MEAN DAILY TEMP. (MDT) (C) 3.8 3.8 6.8 11.8 18.8 21.5 23.4 24.0 19.0 8.9 8.1 4.8 12.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 13.8 32.6 82.2 97.0 11.0 0.0 0.0 0.0 236.6 HEATING DEG. DAYS(BASE 18 0C) 439.7 396.7 346.1 189.5 33.4 0.0 1.5 0.0 19.0 280.8 296.2 410.3 2413.2 DEWPOINT (MEAN C) -2.4 -1.5 2.3 3.2 7.0 6.1 11.1 9.5 7.0 1.2 1.4 -2.8 3.5 MIXING RATIO (G/KG) 3.74 4.04 5.39 5.75 7.52 7.08 9.78 8.87 7.40 4.95 4.97 3.66 6.10 VAPOUR PRESSURE (HPA) 5.21 5.62 7.45 7.96 10.40 9.78 13.45 12.21 10.25 6.91 6.92 5.09 8.44 SATURATION DEF. (HPA) 3.47 3.47 3.26 8.13 15.76 22.64 20.59 22.84 14.81 6.25 5.53 4.74 10.96 RELATIVE HUMIDITY (MEAN %) 66 69 75 57 45 33 44 39 47 59 63 59 55 RELATIVE HUMIDITY (MAX. %) 85 88 91 82 70 52 66 62 69 78 83 79 75 RELATIVE HUMIDITY (MIN. %) 50 54 61 40 31 24 32 26 33 45 48 45 41 RELATIVE HUMIDITY (MEAN% 03UTC) 82 86 88 81 70 51 66 62 68 78 82 77 74 RELATIVE HUMIDITY (MEAN% 09UTC) 53 58 65 47 34 26 35 29 37 52 52 47 45 RELATIVE HUMIDITY (MEAN% 15UTC) 69 70 75 53 42 30 38 33 44 58 64 61 53 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 16.2 28.1 90.6 30.7 25.1 0.3 14.4 0.0 13.0 50.1 10.2 25.7 304.4 DAYS WITH PRECIPITATION >=10 0 0 2 0 1 0 1 0 0 2 0 1 7 DAYS WITH PRECIPITATION >= 5 2 3 9 3 1 0 1 0 1 2 0 1 23 DAYS WITH PRECIPITATION >= 1 3 5 14 8 2 0 2 0 2 5 3 3 47 DAYS WITH PRECIPITATION 8 9 19 12 7 1 3 2 4 8 5 7 85 GREATEST DAILY PRECIPITATION 6.0 9.0 18.0 9.0 22.0 0.3 12.0 0.0 9.0 22.0 4.0 19.0 22.0 DAY 12 21 29 19 6 5 4 ** 20 9 8 28 DAY WITH THUNDER STORM 0 1 2 2 1 0 4 2 0 0 0 1 13 DAYS WITH SNOW OR SLEET 2 6 7 3 0 0 0 0 0 1 3 3 25 DAYS WITH DUST 0 0 0 0 1 1 0 0 0 1 0 1 4 WIND DIRECTION (PREVAILING) 135 315 135 315 135 90 45 90 135 135 315 135 315 PREVAILING WIND SPEED(KNOTS) 6.5 7.4 7.3 7.1 7.8 8.7 8.7 7.5 6.5 7.5 6.7 5.7 6.8 PREVAILING WIND PERCENT 10.3 17.9 20.6 22.7 23.9 23.3 19.4 21.9 17.3 24.5 22.0 14.8 15.9 CALMS PERCENT OF WIND 63.9 52.9 32.3 30.7 25.2 20.7 21.3 27.7 22.7 29.0 50.7 60.6 36.4 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 211 242 202 202 118 78 50 56 127 151 254 206 110 VECTOR WIND MAGNITUDE(KNOTS) 0.7 0.7 1.2 1.0 1.3 3.7 2.3 2.5 1.1 1.3 0.6 0.8 0.6 WIND STEADINESES (MEAN %) 31.8 21.9 25.0 19.2 24.1 55.2 39.0 48.1 22.4 25.5 18.8 32.0 13.3 WIND SPEED (MEAN KNOTS) 2.2 3.2 4.8 5.2 5.4 6.7 5.9 5.2 4.9 5.1 3.2 2.5 4.5 FASTEST WIND DIRECTION 180 320 140 170 140 300 160 340 150 160 230 240 140 FASTEST WIND SPEED (KNOTS) 12 16 12 16 19 16 16 16 16 14 14 16 19 DAY 7 11 2 19 28 5 23 5 18 4 3 24 DAYS WITH SKY CLEAR (0-2)/8 12 8 4 13 13 29 24 25 22 14 14 14 192 DAYS WITH P.CLOUDY (3-6)/8 15 12 11 9 12 1 7 6 7 9 12 11 112 DAYS WITH CLOUDY (7-8)/8 4 8 16 8 6 0 0 0 1 8 4 6 61 DAYS WITH VISIBILITY =< 2 KM 1 5 2 0 0 0 0 0 0 0 3 1 12 DURATION OF SUNSHINE HOURS 200.0 144.2 104.4 211.8 243.6 364.9 332.0 334.9 259.2 194.7 185.3 160.4 2735.4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.6 871.2 866.8 870.2 870.9 869.6 868.8 868.7 871.9 875.8 874.8 872.2 871.0 MAX. QFE PRESSURE IN HPA 882.1 881.2 876.4 877.4 876.8 873.5 874.5 875.0 878.5 882.3 884.7 883.9 884.7 DAY-HOUR 21- 6 1- 6 23- 6 22- 6 1- 3 28- 3 11- 3 8- 3 24- 6 16- 6 30- 6 1- 6 MIN. QFE PRESSURE IN HPA 861.7 860.7 854.9 860.6 864.7 866.0 860.7 864.0 865.7 867.0 864.7 863.1 854.9 DAY-HOUR 7- 3 10-15 14-12 19-15 22-15 2-15 3-12 15-12 6-12 4-12 7-15 24- 9 MEAN QNH PRESSURE IN HPA 1017.1 1016.8 1011.7 1015.5 1016.3 1014.9 1014.0 1013.9 1017.5 1021.9 1020.8 1017.8 1016.5 MAX. QNH PRESSURE IN HPA 1029.1 1028.0 1022.6 1023.7 1023.1 1019.3 1020.5 1021.0 1025.0 1029.3 1032.0 1031.1 1032.0 DAY-HOUR 21- 6 1- 6 23- 6 22- 6 1- 3 28- 3 11- 3 8- 3 24- 6 16- 6 30- 6 1- 6 MIN. QNH PRESSURE IN HPA 1005.9 1004.8 998.2 1004.7 1009.3 1010.8 1004.8 1008.6 1010.5 1012.0 1009.3 1007.5 998.2 DAY-HOUR 7- 3 10-15 14-12 19-15 22-15 2-15 3-12 15-12 6-12 4-12 7-15 24- 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 871.3 871.3 866.7 870.6 871.6 870.2 869.7 869.6 872.9 876.0 875.0 872.3 871.4 MAX. QFE PRESSURE IN HPA 881.1 880.7 876.1 876.7 876.8 873.5 874.5 875.0 878.2 881.9 883.8 883.2 883.8 DAY 21 1 23 30 1 28 11 8 24 29 30 1 MIN. QFE PRESSURE IN HPA 861.7 861.6 857.1 861.5 865.5 867.0 865.0 866.1 868.6 869.9 866.8 864.2 857.1 DAY 7 11 14 5 23 3 3 19 6 9 7 30 MEAN QNH PRESSURE IN HPA 1016.8 1016.9 1011.6 1016.0 1017.2 1015.6 1015.0 1014.9 1018.6 1022.2 1021.0 1018.0 1017.0 MAX. QNH PRESSURE IN HPA 1027.9 1027.5 1022.3 1022.9 1023.1 1019.3 1020.5 1021.0 1024.7 1028.8 1031.0 1030.3 1031.0 DAY 21 1 23 30 1 28 11 8 24 29 30 1 MIN. QNH PRESSURE IN HPA 1005.9 1005.8 1000.7 1005.7 1010.3 1012.0 1009.7 1010.9 1013.8 1015.2 1011.7 1008.8 1000.7 DAY 7 11 14 5 23 3 3 19 6 9 7 30 MEAN QFF PRESSURE IN HPA 1019.9 1019.5 1011.9 1013.9 1010.9 1007.6 1006.1 1006.1 1013.0 1022.0 1021.5 1020.4 1014.4 MAX. QFF PRESSURE IN HPA 1031.8 1031.5 1027.2 1023.1 1020.2 1012.5 1013.1 1012.3 1022.6 1032.5 1037.2 1037.1 1037.2 DAY 21 12 23 22 1 6 11 8 24 29 30 1 MIN. QFF PRESSURE IN HPA 1006.1 1006.1 1000.3 999.2 1002.8 1002.5 999.1 1000.9 1005.3 1011.3 1008.4 1005.1 999.1 DAY 7 11 20 20 23 3 8 19 6 4 7 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 872.4 872.3 867.5 871.1 871.7 870.3 869.6 869.7 873.2 876.7 875.9 873.3 872.0 MAX. QFE PRESSURE IN HPA 882.1 881.2 876.4 877.4 876.6 873.4 874.0 875.0 878.5 882.3 884.7 883.9 884.7 DAY 21 1 23 22 1 28 11 8 24 16 30 1 MIN. QFE PRESSURE IN HPA 864.3 864.9 857.3 864.5 865.9 867.3 863.8 865.8 868.2 870.5 867.1 864.4 857.3 DAY 7 11 14 5 23 13 3 18 22 9 7 24 MEAN QNH PRESSURE IN HPA 1018.1 1017.9 1012.5 1016.5 1017.3 1015.7 1014.9 1015.0 1019.0 1023.0 1022.0 1019.1 1017.6 MAX. QNH PRESSURE IN HPA 1029.1 1028.0 1022.6 1023.7 1022.8 1019.2 1019.9 1021.0 1025.0 1029.3 1032.0 1031.1 1032.0 DAY 21 1 23 22 1 28 11 8 24 16 30 1 MIN. QNH PRESSURE IN HPA 1008.9 1009.6 1001.0 1009.1 1010.7 1012.3 1008.3 1010.6 1013.3 1015.9 1012.1 1009.0 1001.0 DAY 7 11 14 5 23 13 3 18 22 9 7 24 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 871.5 871.4 866.9 870.1 870.9 869.6 868.6 868.5 871.8 875.6 874.6 871.8 870.9 MAX. QFE PRESSURE IN HPA 880.9 880.1 875.5 876.5 875.4 872.2 873.8 873.9 876.9 881.2 883.8 882.8 883.8 DAY 21 1 23 22 13 28 11 8 24 16 30 1 MIN. QFE PRESSURE IN HPA 862.6 864.1 856.2 863.4 865.1 867.0 862.1 864.5 867.0 868.7 865.6 863.1 856.2 DAY 27 10 14 19 23 13 3 18 22 4 7 24 MEAN QNH PRESSURE IN HPA 1017.1 1017.0 1011.9 1015.5 1016.3 1014.9 1013.8 1013.6 1017.4 1021.7 1020.6 1017.4 1016.4 MAX. QNH PRESSURE IN HPA 1027.7 1026.8 1021.6 1022.7 1021.5 1017.9 1019.7 1019.8 1023.2 1028.0 1031.0 1029.9 1031.0 DAY 21 1 23 22 13 28 11 8 24 16 30 1 MIN. QNH PRESSURE IN HPA 1007.0 1008.7 999.7 1007.9 1009.8 1012.0 1006.4 1009.1 1012.0 1013.9 1010.4 1007.5 999.7 DAY 27 10 14 19 23 13 3 18 22 4 7 24 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 871.1 870.3 866.0 869.3 870.0 868.9 867.9 867.7 870.5 874.9 874.0 871.4 870.2 MAX. QFE PRESSURE IN HPA 880.0 878.0 874.8 876.2 874.9 871.6 872.5 873.5 875.9 880.7 883.1 881.5 883.1 DAY 21 1 22 30 13 22 11 5 20 16 30 1 MIN. QFE PRESSURE IN HPA 863.2 862.0 854.9 861.2 864.9 866.5 860.7 864.0 865.7 867.0 865.0 863.1 854.9 DAY 7 10 14 19 23 13 3 15 6 4 7 24 MEAN QNH PRESSURE IN HPA 1016.6 1015.7 1010.9 1014.6 1015.3 1014.2 1013.0 1012.8 1016.0 1020.9 1019.9 1016.9 1015.6 MAX. QNH PRESSURE IN HPA 1026.7 1024.4 1020.8 1022.4 1020.9 1017.2 1018.2 1019.3 1022.0 1027.5 1030.2 1028.4 1030.2 DAY 21 1 22 30 13 22 11 5 20 16 30 1 MIN. QNH PRESSURE IN HPA 1007.6 1006.3 998.2 1005.4 1009.6 1011.4 1004.8 1008.6 1010.5 1012.0 1009.7 1007.5 998.2 DAY 7 10 14 19 23 13 3 15 6 4 7 24 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.7 870.9 866.9 869.8 870.3 869.2 868.2 868.0 871.3 875.8 874.7 872.1 870.7 MAX. QFE PRESSURE IN HPA 880.3 877.8 875.9 876.7 875.2 872.1 872.3 873.2 876.0 882.0 883.7 882.4 883.7 DAY 21 1 22 30 13 22 11 5 25 16 30 1 MIN. QFE PRESSURE IN HPA 864.0 860.7 856.5 860.6 864.7 866.0 862.7 864.0 866.0 867.4 864.7 864.3 856.5 DAY 2 10 14 19 22 2 8 25 22 4 7 13 MEAN QNH PRESSURE IN HPA 1017.3 1016.4 1011.9 1015.1 1015.7 1014.4 1013.3 1013.1 1016.8 1022.0 1020.7 1017.8 1016.2 MAX. QNH PRESSURE IN HPA 1027.0 1024.2 1022.0 1022.9 1021.2 1017.7 1018.0 1019.0 1022.2 1029.0 1030.9 1029.4 1030.9 DAY 21 1 22 30 13 22 11 5 25 16 30 1 MIN. QNH PRESSURE IN HPA 1008.6 1004.8 1000.0 1004.7 1009.3 1010.8 1007.1 1008.6 1010.8 1012.4 1009.3 1008.9 1000.0 DAY 2 10 14 19 22 2 8 25 22 4 7 13 MEAN QFF PRESSURE IN HPA 1020.2 1018.8 1012.2 1012.9 1009.4 1006.3 1004.5 1004.4 1011.2 1021.8 1021.3 1020.2 1013.6 MAX. QFF PRESSURE IN HPA 1032.7 1029.3 1026.9 1023.5 1015.9 1011.2 1010.9 1010.6 1018.5 1032.5 1036.9 1036.2 1036.9 DAY 21 12 22 6 6 22 11 5 25 28 30 1 MIN. QFF PRESSURE IN HPA 1011.7 1003.8 999.9 998.0 1001.7 1001.6 996.2 998.7 1003.2 1007.3 1004.8 1006.4 996.2 DAY 27 10 14 19 24 2 8 15 5 4 7 24 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.0 0.4 6.8 12.5 17.9 25.8 26.5 24.4 20.7 14.8 10.4 5.4 13.7 MINIMUN AIR TEMPERATURE (C) -6.6 -4.7 2.3 7.7 10.9 15.2 17.2 15.6 11.7 6.3 3.2 -0.4 6.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 22 14 0 0 0 0 0 0 0 0 1 5 42 DAYS WITH FREEZING MIN.<= 0 31 24 4 2 0 0 0 0 0 0 9 15 85 TEMPERATURE RECORDS LOWEST(C) -16.8 -18.8 -2.6 -0.4 4.8 11.4 11.6 10.4 3.6 1.4 -4.0 -9.6 -18.8 DAY 21 7 25 3 6 1 24 25 27 3 16 30 MAXIMUM AIR TEMPERATURE (C) 3.2 5.5 13.3 19.6 23.6 31.2 31.5 29.7 26.7 20.7 16.2 10.6 19.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 17 26 16 6 0 0 0 66 DAYS WITH MAXIMUM TEMP. <= 0 5 7 0 0 0 0 0 0 0 0 0 1 13 TEMPERATURE RECORDS HIGHEST(C) 7.8 16.6 23.6 27.8 32.2 38.0 34.6 36.6 33.0 27.4 24.2 18.0 38.0 DAY 5 24 21 19 28 17 12 12 5 27 4 7 DIF. BETWEEN (MAX.-MIN.) (C) 9.8 10.2 11.0 11.9 12.7 16.0 14.3 14.1 15.0 14.4 13.0 11.0 12.8 MEAN DAILY TEMP. (MDT) (C) -1.7 0.4 7.8 13.6 17.3 23.2 24.4 22.6 19.2 13.5 9.7 5.1 12.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 3.4 72.4 104.9 58.8 19.1 0.0 0.0 0.0 258.6 HEATING DEG. DAYS(BASE 18 0C) 611.1 509.8 316.1 141.4 49.9 0.0 0.0 0.0 30.7 138.6 249.2 388.4 2435.1 DEWPOINT (MEAN C) -4.5 -3.6 0.6 5.4 7.5 6.0 9.7 7.6 7.4 1.4 -0.1 -2.0 3.0 MIXING RATIO (G/KG) 3.26 3.58 4.77 6.76 7.62 7.11 9.22 7.86 7.73 5.03 4.54 3.92 5.95 VAPOUR PRESSURE (HPA) 4.54 4.97 6.59 9.34 10.52 9.78 12.63 10.82 10.68 7.01 6.32 5.44 8.22 SATURATION DEF. (HPA) 1.35 1.82 3.78 6.51 11.27 24.88 23.18 20.85 15.19 10.75 7.26 4.14 10.91 RELATIVE HUMIDITY (MEAN %) 79 77 69 66 55 32 40 38 46 45 54 63 55 RELATIVE HUMIDITY (MAX. %) 89 88 89 88 75 53 62 63 71 66 78 82 75 RELATIVE HUMIDITY (MIN. %) 68 62 43 45 38 20 27 24 30 31 35 47 39 RELATIVE HUMIDITY (MEAN% 03UTC) 85 84 83 82 75 53 62 63 71 65 76 82 73 RELATIVE HUMIDITY (MEAN% 09UTC) 72 66 50 50 42 23 30 28 35 36 39 51 44 RELATIVE HUMIDITY (MEAN% 15UTC) 84 80 61 59 49 28 35 32 42 44 56 65 53 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 54.7 75.1 59.8 83.1 8.0 0.0 11.2 0.8 3.6 1.3 20.0 38.3 355.9 DAYS WITH PRECIPITATION >=10 1 3 2 4 0 0 0 0 0 0 1 1 12 DAYS WITH PRECIPITATION >= 5 3 4 3 6 1 0 1 0 0 0 1 4 23 DAYS WITH PRECIPITATION >= 1 9 8 8 11 1 0 2 0 1 1 2 4 47 DAYS WITH PRECIPITATION 16 11 13 15 5 0 5 2 4 2 4 7 84 GREATEST DAILY PRECIPITATION 22.0 23.0 20.0 15.3 7.0 0.0 7.0 0.5 3.0 1.0 17.0 16.0 23.0 DAY 19 25 5 28 3 ** 27 21 3 18 15 28 DAY WITH THUNDER STORM 0 0 1 7 1 2 3 0 3 0 0 1 18 DAYS WITH SNOW OR SLEET 11 12 6 4 0 0 0 0 0 0 2 3 38 DAYS WITH DUST 1 0 1 0 0 1 0 1 0 0 0 0 4 WIND DIRECTION (PREVAILING) 135 135 135 135 135 135 90 90 135 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 6.7 6.5 8.1 7.1 7.6 8.5 7.9 7.0 6.5 5.8 6.8 7.0 7.2 PREVAILING WIND PERCENT 14.2 19.0 20.6 30.0 29.8 20.7 24.5 20.0 22.7 16.8 13.3 15.5 18.6 CALMS PERCENT OF WIND 61.9 46.7 29.8 32.9 25.1 22.0 29.0 29.7 30.0 52.9 56.0 55.5 38.7 NO. OF WIND OBSERVATION 155 195 248 240 171 150 155 155 150 155 150 155 2079 VECTOR WIND DIRECTION (MEAN) 202 129 197 145 141 92 65 52 115 221 190 186 116 VECTOR WIND MAGNITUDE(KNOTS) 0.4 0.2 1.1 1.8 2.0 1.9 3.4 2.5 0.8 0.2 1.0 1.3 0.8 WIND STEADINESES (MEAN %) 16.7 5.7 21.6 40.9 39.2 33.9 64.2 52.1 17.8 6.5 35.7 46.4 19.5 WIND SPEED (MEAN KNOTS) 2.4 3.5 5.1 4.4 5.1 5.6 5.3 4.8 4.5 3.1 2.8 2.8 4.1 FASTEST WIND DIRECTION 300 180 150 130 150 150 60 60 310 300 300 220 150 FASTEST WIND SPEED (KNOTS) 14 12 17 14 14 19 14 16 16 14 14 14 19 DAY 20 2 23 7 6 17 22 6 21 22 14 27 DAYS WITH SKY CLEAR (0-2)/8 8 8 8 6 21 25 27 26 26 25 17 13 210 DAYS WITH P.CLOUDY (3-6)/8 13 10 15 13 6 5 3 5 4 4 11 15 104 DAYS WITH CLOUDY (7-8)/8 10 11 8 11 4 0 1 0 0 2 2 3 52 DAYS WITH VISIBILITY =< 2 KM 4 5 1 1 1 0 0 0 0 0 1 3 16 DURATION OF SUNSHINE HOURS 131.8 133.2 202.6 160.2 283.4 339.8 338.6 333.8 288.8 252.0 189.1 167.8 2821.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.0 870.6 867.0 870.5 869.9 866.5 866.3 867.7 871.2 874.1 872.9 870.3 869.8 MAX. QFE PRESSURE IN HPA 881.8 880.7 878.1 881.1 877.9 872.6 870.7 874.3 877.5 881.3 882.5 879.1 882.5 DAY-HOUR 3- 6 7- 6 17- 6 8-18 4-18 1- 3 31- 3 21- 6 25- 6 28- 6 6- 6 5- 6 MIN. QFE PRESSURE IN HPA 860.8 862.9 856.4 861.3 862.4 857.1 861.7 861.6 865.5 865.9 864.1 854.0 854.0 DAY-HOUR 29- 3 17-12 5- 0 30-12 1- 0 23-12 8-12 29-12 5-12 30-12 20-12 27-12 MEAN QNH PRESSURE IN HPA 1016.5 1016.0 1012.0 1015.9 1015.3 1011.4 1011.1 1012.7 1016.7 1020.0 1018.6 1015.7 1015.2 MAX. QNH PRESSURE IN HPA 1028.7 1027.5 1024.5 1027.9 1024.3 1018.3 1016.1 1020.2 1023.9 1028.2 1029.5 1025.7 1029.5 DAY-HOUR 3- 6 7- 6 17- 6 8-18 4-18 1- 3 31- 3 21- 6 25- 6 28- 6 6- 6 5- 6 MIN. QNH PRESSURE IN HPA 1004.9 1007.3 999.9 1005.5 1006.7 1000.7 1005.9 1005.8 1010.3 1010.7 1008.7 997.2 997.2 DAY-HOUR 29- 3 17-12 5- 0 30-12 1- 0 23-12 8-12 29-12 5-12 30-12 20-12 27-12 MEAN QFF PRESSURE IN HPA ****** 1019.1 1011.6 1012.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** 1039.5 1025.3 1029.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** 7- 3 17- 6 9- 6 **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** 1007.1 997.1 999.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** 2-15 5- 0 15-12 **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** 870.0 866.8 870.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** 873.5 875.4 879.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 21 17 9 ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** 865.8 856.4 865.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 24 5 1 ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** 1015.3 1011.7 1015.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** 1019.3 1021.5 1025.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 21 17 9 ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** 1010.6 999.9 1010.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 24 5 1 ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** 1017.6 1010.9 1011.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** 1025.2 1020.8 1028.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 16 17 9 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** 1009.4 997.1 1003.5 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 24 5 15 ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 870.7 870.6 867.3 870.8 870.3 867.5 867.2 868.6 872.0 874.6 873.4 870.5 870.3 MAX. QFE PRESSURE IN HPA 880.4 879.8 877.3 879.9 877.2 872.6 870.7 874.1 877.2 881.0 881.4 877.3 881.4 DAY 3 7 17 9 5 1 31 21 25 17 6 5 MIN. QFE PRESSURE IN HPA 860.8 864.5 857.0 865.8 862.9 860.5 863.6 863.6 868.0 866.9 865.3 858.0 857.0 DAY 29 1 5 1 1 24 8 30 5 31 20 26 MEAN QNH PRESSURE IN HPA 1016.1 1016.0 1012.3 1016.2 1015.7 1012.6 1012.2 1013.8 1017.6 1020.5 1019.2 1016.0 1015.7 MAX. QNH PRESSURE IN HPA 1027.1 1026.5 1023.6 1026.6 1023.5 1018.3 1016.1 1020.0 1023.5 1027.8 1028.3 1023.6 1028.3 DAY 3 7 17 9 5 1 31 21 25 17 6 5 MIN. QNH PRESSURE IN HPA 1004.9 1009.1 1000.6 1010.6 1007.3 1004.6 1008.1 1008.1 1013.1 1011.8 1010.0 1001.8 1000.6 DAY 29 1 5 1 1 24 8 30 5 31 20 26 MEAN QFF PRESSURE IN HPA 1021.8 1020.9 1012.5 1013.2 1010.2 1003.9 1002.8 1005.6 1011.8 1018.3 1019.0 1018.0 1013.2 MAX. QFF PRESSURE IN HPA 1036.2 1039.5 1024.5 1028.9 1021.8 1012.7 1007.1 1011.0 1020.7 1028.0 1027.8 1030.4 1039.5 DAY 3 7 17 9 5 1 31 21 25 17 16 30 MIN. QFF PRESSURE IN HPA 1006.7 1009.5 997.6 1004.5 1000.5 995.0 998.4 1000.0 1005.6 1009.3 1007.8 1003.6 995.0 DAY 29 2 5 15 29 24 8 30 5 31 20 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.8 871.5 867.9 871.2 870.4 867.4 867.1 868.7 872.3 875.1 874.0 871.5 870.7 MAX. QFE PRESSURE IN HPA 881.8 880.7 878.1 881.0 877.7 872.3 870.6 874.3 877.5 881.3 882.5 879.1 882.5 DAY 3 7 17 9 5 1 31 21 25 28 6 5 MIN. QFE PRESSURE IN HPA 861.6 865.1 857.9 865.3 863.3 860.6 863.5 864.0 868.0 869.5 865.2 858.6 857.9 DAY 29 1 5 30 1 23 8 29 5 21 20 26 MEAN QNH PRESSURE IN HPA 1017.4 1017.0 1013.0 1016.8 1015.8 1012.4 1012.0 1013.9 1018.0 1021.1 1019.9 1017.0 1016.2 MAX. QNH PRESSURE IN HPA 1028.7 1027.5 1024.5 1027.8 1024.1 1018.0 1016.0 1020.2 1023.9 1028.2 1029.5 1025.7 1029.5 DAY 3 7 17 9 5 1 31 21 25 28 6 5 MIN. QNH PRESSURE IN HPA 1005.8 1009.8 1001.6 1010.0 1007.8 1004.7 1008.0 1008.6 1013.1 1014.8 1009.9 1002.4 1001.6 DAY 29 1 5 30 1 23 8 29 5 21 20 26 MEAN QFF PRESSURE IN HPA ****** 1019.6 1012.9 1013.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** 1026.3 1025.3 1029.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 16 17 9 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** 1009.9 999.1 1004.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 24 5 15 ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 870.9 870.8 866.8 870.4 869.6 866.4 866.2 867.6 870.9 873.7 872.4 870.0 869.6 MAX. QFE PRESSURE IN HPA 881.1 879.8 877.3 880.3 876.8 871.6 869.2 872.9 875.8 880.3 880.1 877.9 881.1 DAY 3 7 17 9 5 1 31 21 21 16 6 5 MIN. QFE PRESSURE IN HPA 861.2 864.1 857.7 862.7 863.4 858.6 862.6 862.8 866.5 867.5 864.2 856.8 856.8 DAY 29 17 5 30 1 23 1 29 5 30 20 27 MEAN QNH PRESSURE IN HPA 1016.4 1016.3 1011.8 1015.8 1014.9 1011.2 1011.0 1012.6 1016.4 1019.6 1018.0 1015.4 1014.9 MAX. QNH PRESSURE IN HPA 1027.9 1026.5 1023.6 1027.0 1023.1 1017.2 1014.4 1018.6 1021.9 1027.0 1026.8 1024.3 1027.9 DAY 3 7 17 9 5 1 31 21 21 16 6 5 MIN. QNH PRESSURE IN HPA 1005.4 1008.7 1001.4 1007.1 1007.9 1002.4 1007.0 1007.2 1011.4 1012.5 1008.8 1000.4 1000.4 DAY 29 17 5 30 1 23 1 29 5 30 20 27 MEAN QFF PRESSURE IN HPA ****** 1017.7 1011.0 1012.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** 1024.2 1024.2 1027.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 15 17 9 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** 1008.4 999.7 1002.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 24 5 30 ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 870.6 870.0 865.8 869.4 868.8 865.5 865.3 866.7 870.0 873.0 871.8 869.4 868.8 MAX. QFE PRESSURE IN HPA 879.6 878.9 875.4 878.7 876.2 870.6 868.7 871.8 875.2 880.2 879.3 876.8 880.2 DAY 3 7 17 9 5 8 30 21 21 16 5 5 MIN. QFE PRESSURE IN HPA 861.8 862.9 857.7 861.3 863.3 857.1 861.7 861.6 865.5 865.9 864.1 854.0 854.0 DAY 29 17 27 30 28 23 8 29 5 30 20 27 MEAN QNH PRESSURE IN HPA 1016.0 1015.3 1010.6 1014.7 1013.9 1010.2 1010.1 1011.6 1015.3 1018.8 1017.4 1014.7 1014.1 MAX. QNH PRESSURE IN HPA 1026.2 1025.4 1021.5 1025.2 1022.4 1016.0 1013.9 1017.4 1021.2 1026.9 1025.9 1023.1 1026.9 DAY 3 7 17 9 5 8 30 21 21 16 5 5 MIN. QNH PRESSURE IN HPA 1006.1 1007.3 1001.4 1005.5 1007.8 1000.7 1005.9 1005.8 1010.3 1010.7 1008.7 997.2 997.2 DAY 29 17 27 30 28 23 8 29 5 30 20 27 MEAN QFF PRESSURE IN HPA ****** 1016.3 1009.8 1011.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** 1023.3 1021.6 1026.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 15 17 8 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** 1007.8 997.6 999.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 24 21 15 ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.2 870.6 866.6 869.8 869.2 865.8 865.5 867.0 870.7 874.0 872.8 870.3 869.5 MAX. QFE PRESSURE IN HPA 879.7 879.9 875.1 879.7 876.8 870.9 868.9 872.3 876.2 881.0 880.8 877.3 881.0 DAY 3 6 17 8 5 8 30 21 21 16 5 5 MIN. QFE PRESSURE IN HPA 863.6 864.0 859.2 863.2 862.5 859.2 861.8 861.8 866.1 866.0 865.3 854.2 854.2 DAY 29 2 9 30 28 23 8 29 5 30 28 27 MEAN QNH PRESSURE IN HPA 1016.7 1016.1 1011.5 1015.1 1014.4 1010.6 1010.3 1011.9 1016.2 1019.9 1018.5 1015.7 1014.7 MAX. QNH PRESSURE IN HPA 1026.4 1026.6 1021.1 1026.4 1023.1 1016.4 1014.1 1018.0 1022.4 1027.8 1027.6 1023.6 1027.8 DAY 3 6 17 8 5 8 30 21 21 16 5 5 MIN. QNH PRESSURE IN HPA 1008.1 1008.6 1003.1 1007.6 1006.9 1003.1 1006.1 1006.1 1010.9 1010.8 1010.0 997.4 997.4 DAY 29 2 9 30 28 23 8 29 5 30 28 27 MEAN QFF PRESSURE IN HPA 1022.3 1020.8 1011.6 1012.1 1008.9 1002.0 1000.9 1003.9 1010.4 1017.6 1018.3 1017.7 1012.2 MAX. QFF PRESSURE IN HPA 1036.1 1039.3 1022.3 1028.8 1021.3 1009.1 1005.1 1010.0 1017.9 1026.6 1027.2 1030.1 1039.3 DAY 3 7 17 8 5 8 30 21 25 16 15 29 MIN. QFF PRESSURE IN HPA 1011.0 1007.1 999.5 1001.8 998.1 992.2 996.5 998.1 1002.6 1008.1 1010.2 996.3 992.2 DAY 29 2 21 15 28 23 8 29 5 30 20 27 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** 870.6 867.6 871.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** 875.2 875.7 881.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 20 17 8 ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** 865.0 860.0 863.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 29 4 30 ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** 1016.1 1012.6 1016.6 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** 1021.2 1021.8 1027.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 20 17 8 ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** 1009.7 1004.0 1008.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 29 4 30 ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** 1019.1 1012.6 1013.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** 1026.1 1022.7 1029.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 15 17 8 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** 1008.5 1002.3 1002.8 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 29 4 23 ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** 870.1 867.5 870.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** 874.4 875.9 880.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 20 17 8 ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** 864.5 858.6 862.9 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 29 4 30 ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** 1015.5 1012.5 1016.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** 1020.3 1022.0 1026.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 20 17 8 ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** 1009.1 1002.4 1007.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 29 4 30 ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** 1017.8 1011.7 1012.3 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** 1024.5 1022.4 1028.2 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 15 17 8 ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** 1007.4 1001.2 1002.7 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** 29 4 30 ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.4 -3.4 7.2 13.6 18.9 25.6 27.6 25.6 21.2 17.1 8.8 4.9 13.6 MINIMUN AIR TEMPERATURE (C) -9.0 -9.6 1.7 6.1 9.0 15.1 18.0 15.2 11.3 7.5 1.1 0.8 5.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 0 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 27 24 0 0 0 0 0 0 0 0 1 0 52 DAYS WITH FREEZING MIN.<= 0 31 28 8 0 3 0 0 0 0 0 11 15 96 TEMPERATURE RECORDS LOWEST(C) -17.8 -17.8 -3.8 1.0 -0.8 10.8 12.8 11.4 3.8 0.6 -4.0 -3.2 -17.8 DAY 31 4 1 2 3 2 31 1 23 25 8 25 MAXIMUM AIR TEMPERATURE (C) 0.7 0.8 12.2 19.8 24.4 31.1 32.5 31.1 27.8 23.4 14.3 8.6 18.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 6 23 27 23 11 5 0 0 95 DAYS WITH MAXIMUM TEMP. <= 0 16 14 0 0 0 0 0 0 0 0 0 0 30 TEMPERATURE RECORDS HIGHEST(C) 9.4 8.4 21.8 26.2 32.8 35.8 38.0 35.6 34.6 31.0 21.0 20.6 38.0 DAY 2 22 26 28 31 24 8 10 2 8 30 1 DIF. BETWEEN (MAX.-MIN.) (C) 9.7 10.4 10.5 13.7 15.4 16.0 14.5 15.9 16.5 15.9 13.2 7.8 13.3 MEAN DAILY TEMP. (MDT) (C) -4.1 -4.4 6.9 13.0 16.7 23.1 25.2 23.1 19.5 15.4 7.7 4.7 12.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 9.3 70.7 130.8 69.8 18.7 0.5 0.0 0.0 299.8 HEATING DEG. DAYS(BASE 18 0C) 686.0 626.9 343.2 146.1 78.2 0.1 0.0 0.0 23.6 103.4 309.0 413.6 2730.1 DEWPOINT (MEAN C) -8.2 -9.0 -0.2 1.2 5.3 6.2 8.9 8.0 4.7 2.0 0.2 0.2 1.6 MIXING RATIO (G/KG) 2.47 2.34 4.48 4.89 6.68 7.13 8.60 8.00 6.40 5.26 4.56 4.53 5.44 VAPOUR PRESSURE (HPA) 3.44 3.27 6.20 6.79 9.25 9.83 11.83 11.02 8.85 7.33 6.35 6.29 7.54 SATURATION DEF. (HPA) 1.57 1.79 4.51 9.77 14.27 24.44 26.14 23.17 18.14 13.90 5.63 2.64 12.16 RELATIVE HUMIDITY (MEAN %) 72 68 64 48 44 32 34 36 38 42 58 74 51 RELATIVE HUMIDITY (MAX. %) 85 82 85 74 68 54 59 57 57 63 79 88 71 RELATIVE HUMIDITY (MIN. %) 58 53 47 28 31 22 22 24 25 27 42 61 37 RELATIVE HUMIDITY (MEAN% 03UTC) 83 79 82 70 68 53 58 56 57 62 78 84 69 RELATIVE HUMIDITY (MEAN% 09UTC) 63 60 53 34 34 24 24 27 29 30 47 65 41 RELATIVE HUMIDITY (MEAN% 15UTC) 75 72 61 39 40 26 28 30 35 43 60 78 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 42.7 30.3 51.0 15.0 1.0 0.4 0.7 0.0 0.4 0.7 16.1 45.3 203.6 DAYS WITH PRECIPITATION >=10 1 1 2 1 0 0 0 0 0 0 0 2 7 DAYS WITH PRECIPITATION >= 5 4 2 4 1 0 0 0 0 0 0 2 3 16 DAYS WITH PRECIPITATION >= 1 8 7 6 4 1 0 0 0 0 0 3 7 36 DAYS WITH PRECIPITATION 17 11 6 7 4 2 1 3 1 2 5 9 68 GREATEST DAILY PRECIPITATION 11.6 14.0 16.0 11.0 1.0 0.4 0.7 0.0 0.4 0.4 6.0 16.0 16.0 DAY 4 23 28 30 15 8 5 ** 20 23 16 16 DAY WITH THUNDER STORM 0 0 3 3 2 1 1 2 0 0 1 1 14 DAYS WITH SNOW OR SLEET 14 13 3 0 0 0 0 0 0 0 0 2 32 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 315 315 315 315 135 45 45 45 135 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 5.4 5.6 6.4 6.9 7.1 9.7 9.6 8.3 7.3 7.2 6.7 7.3 7.0 PREVAILING WIND PERCENT 11.6 15.0 16.0 16.0 19.4 26.0 34.2 27.7 21.3 18.7 21.3 15.5 13.9 CALMS PERCENT OF WIND 69.0 69.3 46.0 44.4 34.2 24.7 21.3 33.5 40.0 40.6 44.7 58.1 43.7 NO. OF WIND OBSERVATION 155 140 187 187 155 150 155 155 150 155 150 155 1894 VECTOR WIND DIRECTION (MEAN) 216 290 185 87 88 74 54 50 101 151 172 171 82 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.7 0.5 0.5 1.2 3.6 4.4 2.9 2.2 0.6 1.5 0.8 1.1 WIND STEADINESES (MEAN %) 11.1 38.9 14.3 12.8 26.7 59.0 66.7 56.9 48.9 15.0 42.9 29.6 27.5 WIND SPEED (MEAN KNOTS) 1.8 1.8 3.5 3.9 4.5 6.1 6.6 5.1 4.5 4.0 3.5 2.7 4.0 FASTEST WIND DIRECTION 150 150 160 310 150 60 80 60 300 120 160 220 60 FASTEST WIND SPEED (KNOTS) 12 10 16 17 14 17 14 19 17 12 14 12 19 DAY 22 14 28 29 12 11 7 3 19 1 21 5 DAYS WITH SKY CLEAR (0-2)/8 13 16 8 16 21 23 27 29 24 24 20 10 231 DAYS WITH P.CLOUDY (3-6)/8 8 6 15 12 7 6 4 2 6 5 8 9 88 DAYS WITH CLOUDY (7-8)/8 10 6 8 2 3 1 0 0 0 2 2 12 46 DAYS WITH VISIBILITY =< 2 KM 0 1 1 0 0 0 0 0 0 0 0 2 4 DURATION OF SUNSHINE HOURS 146.0 175.9 165.6 271.4 283.9 321.6 346.6 350.4 299.4 256.1 217.1 130.9 2964.9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 870.7 873.0 867.9 871.7 871.0 868.1 868.4 868.7 870.1 873.8 873.4 870.8 870.6 MAX. QFE PRESSURE IN HPA 881.0 881.1 875.6 876.6 876.0 872.6 874.3 874.8 880.1 882.0 880.1 875.6 882.0 DAY-HOUR 22- 6 8- 6 8- 6 11- 6 21- 6 2- 3 10- 3 19- 6 23- 6 24- 6 8- 6 18-15 MIN. QFE PRESSURE IN HPA 859.7 860.7 854.5 866.4 864.6 861.9 863.3 861.1 862.8 865.0 867.3 861.0 854.5 DAY-HOUR 17-12 23- 3 30- 9 14-12 7- 3 11-12 6-15 1-12 12-12 2-12 20- 9 5- 9 MEAN QNH PRESSURE IN HPA 1016.2 1018.7 1012.9 1017.3 1016.5 1013.2 1013.6 1013.9 1015.4 1019.6 1019.2 1016.3 1016.1 MAX. QNH PRESSURE IN HPA 1027.8 1027.9 1021.7 1022.8 1022.2 1018.3 1020.2 1020.8 1026.8 1029.0 1026.8 1021.7 1029.0 DAY-HOUR 22- 6 8- 6 8- 6 11- 6 21- 6 2- 3 10- 3 19- 6 23- 6 24- 6 8- 6 18-15 MIN. QNH PRESSURE IN HPA 1003.7 1004.8 997.8 1011.3 1009.2 1006.2 1007.8 1005.3 1007.2 1009.7 1012.3 1005.2 997.8 DAY-HOUR 17-12 23- 3 30- 9 14-12 7- 3 11-12 6-15 1-12 12-12 2-12 20- 9 5- 9 MEAN QFF PRESSURE IN HPA ****** ****** 1011.4 1014.0 ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** 1022.9 1021.1 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** 1- 3 3- 3 **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** 996.1 1005.4 ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** 30- 9 14- 9 **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 870.6 872.6 868.5 872.2 871.9 869.1 869.3 869.5 871.0 874.4 873.7 870.9 871.1 MAX. QFE PRESSURE IN HPA 880.2 879.8 874.3 876.3 875.8 872.6 874.3 874.3 879.5 880.8 879.6 874.1 880.8 DAY 22 8 8 11 21 2 10 19 23 24 8 29 MIN. QFE PRESSURE IN HPA 861.7 860.7 856.9 867.7 864.6 864.7 865.6 863.4 865.3 866.2 867.8 862.1 856.9 DAY 17 23 30 29 7 10 6 2 13 2 20 5 MEAN QNH PRESSURE IN HPA 1016.0 1018.3 1013.6 1017.9 1017.5 1014.3 1014.6 1014.8 1016.5 1020.4 1019.6 1016.4 1016.7 MAX. QNH PRESSURE IN HPA 1026.9 1026.5 1020.2 1022.5 1021.9 1018.3 1020.2 1020.2 1026.1 1027.6 1026.2 1020.0 1027.6 DAY 22 8 8 11 21 2 10 19 23 24 8 29 MIN. QNH PRESSURE IN HPA 1005.9 1004.8 1000.5 1012.8 1009.2 1009.3 1010.4 1007.9 1010.0 1011.0 1012.9 1006.4 1000.5 DAY 17 23 30 29 7 10 6 2 13 2 20 5 MEAN QFF PRESSURE IN HPA 1023.3 1026.0 1014.2 1015.2 1012.5 1005.6 1004.7 1006.4 1010.6 1017.0 1020.5 1018.2 1014.5 MAX. QFF PRESSURE IN HPA 1035.1 1039.6 1022.9 1021.1 1021.4 1012.8 1009.2 1013.2 1025.2 1028.1 1029.8 1022.5 1039.6 DAY 29 4 1 3 1 2 10 20 23 24 8 19 MIN. QFF PRESSURE IN HPA 1010.6 1006.7 997.8 1006.5 1000.9 1000.5 999.8 999.5 1002.7 1004.5 1010.7 1005.4 997.8 DAY 3 23 30 29 7 11 7 2 13 2 16 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.7 873.6 869.3 872.6 871.8 869.0 869.2 869.7 871.2 874.9 874.4 871.8 871.6 MAX. QFE PRESSURE IN HPA 881.0 881.1 875.6 876.6 876.0 872.6 873.7 874.8 880.1 882.0 880.1 875.1 882.0 DAY 22 8 8 11 21 2 10 19 23 24 8 18 MIN. QFE PRESSURE IN HPA 861.6 861.1 856.4 867.8 865.1 864.7 865.6 863.9 865.8 865.9 868.3 861.8 856.4 DAY 17 23 30 14 7 10 6 1 14 2 20 5 MEAN QNH PRESSURE IN HPA 1017.3 1019.5 1014.5 1018.3 1017.4 1014.2 1014.5 1015.0 1016.8 1020.9 1020.3 1017.4 1017.2 MAX. QNH PRESSURE IN HPA 1027.8 1027.9 1021.7 1022.8 1022.2 1018.3 1019.5 1020.8 1026.8 1029.0 1026.8 1021.1 1029.0 DAY 22 8 8 11 21 2 10 19 23 24 8 18 MIN. QNH PRESSURE IN HPA 1005.8 1005.3 999.9 1012.9 1009.8 1009.3 1010.4 1008.4 1010.6 1010.7 1013.4 1006.1 999.9 DAY 17 23 30 14 7 10 6 1 14 2 20 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 870.5 872.9 868.4 871.6 870.8 867.9 868.2 868.6 869.8 873.5 873.0 870.5 870.5 MAX. QFE PRESSURE IN HPA 879.4 880.2 874.8 875.7 875.2 871.4 872.1 872.9 878.6 880.2 878.7 874.8 880.2 DAY 22 8 8 8 21 2 10 19 23 24 8 18 MIN. QFE PRESSURE IN HPA 859.8 861.5 854.5 866.7 865.4 863.8 864.4 862.3 864.3 865.2 867.3 861.0 854.5 DAY 17 23 30 14 7 10 6 1 12 2 20 5 MEAN QNH PRESSURE IN HPA 1015.9 1018.7 1013.5 1017.1 1016.3 1013.0 1013.4 1013.7 1015.2 1019.3 1018.8 1015.9 1015.9 MAX. QNH PRESSURE IN HPA 1026.0 1026.9 1020.8 1021.8 1021.2 1016.9 1017.7 1018.6 1025.1 1026.9 1025.2 1020.8 1026.9 DAY 22 8 8 8 21 2 10 19 23 24 8 18 MIN. QNH PRESSURE IN HPA 1003.8 1005.7 997.8 1011.6 1010.1 1008.3 1009.0 1006.6 1008.9 1009.9 1012.3 1005.2 997.8 DAY 17 23 30 14 7 10 6 1 12 2 20 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 870.1 872.4 867.5 870.6 870.0 867.1 867.6 867.7 868.8 872.6 872.5 870.1 869.7 MAX. QFE PRESSURE IN HPA 878.7 879.3 873.3 874.4 873.8 870.5 871.5 871.5 877.6 878.9 878.0 874.9 879.3 DAY 22 8 8 8 21 6 10 19 23 24 1 18 MIN. QFE PRESSURE IN HPA 859.7 863.0 858.0 866.4 864.6 861.9 863.6 861.1 862.8 865.0 867.7 863.8 858.0 DAY 17 23 30 14 7 11 6 1 12 2 24 5 MEAN QNH PRESSURE IN HPA 1015.4 1018.1 1012.5 1016.0 1015.3 1012.0 1012.6 1012.7 1014.0 1018.3 1018.2 1015.5 1015.1 MAX. QNH PRESSURE IN HPA 1025.2 1025.9 1019.1 1020.3 1019.7 1015.9 1017.1 1017.1 1024.0 1025.4 1024.4 1020.9 1025.9 DAY 22 8 8 8 21 6 10 19 23 24 1 18 MIN. QNH PRESSURE IN HPA 1003.7 1007.4 1001.8 1011.3 1009.2 1006.2 1008.1 1005.3 1007.2 1009.7 1012.8 1008.3 1001.8 DAY 17 23 30 14 7 11 6 1 12 2 24 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 870.8 873.2 868.0 871.2 870.4 867.4 867.8 868.0 869.5 873.5 873.4 870.9 870.4 MAX. QFE PRESSURE IN HPA 880.1 879.6 874.0 875.1 874.4 870.3 871.2 872.1 877.8 879.5 878.6 875.6 880.1 DAY 21 8 8 11 20 2 10 19 23 24 8 18 MIN. QFE PRESSURE IN HPA 861.1 865.6 858.1 866.5 865.4 862.6 863.3 861.2 863.5 866.1 867.8 866.2 858.1 DAY 17 1 28 14 6 10 6 1 12 2 24 8 MEAN QNH PRESSURE IN HPA 1016.2 1019.0 1013.1 1016.7 1015.8 1012.4 1012.8 1013.1 1014.7 1019.4 1019.3 1016.4 1015.8 MAX. QNH PRESSURE IN HPA 1026.8 1026.2 1019.9 1021.1 1020.3 1015.7 1016.7 1017.7 1024.2 1026.1 1025.1 1021.7 1026.8 DAY 21 8 8 11 20 2 10 19 23 24 8 18 MIN. QNH PRESSURE IN HPA 1005.3 1010.4 1001.9 1011.4 1010.1 1007.0 1007.8 1005.4 1008.0 1010.9 1012.9 1011.0 1001.9 DAY 17 1 28 14 6 10 6 1 12 2 24 8 MEAN QFF PRESSURE IN HPA 1023.5 1026.6 1013.7 1014.0 1010.6 1003.8 1003.1 1004.7 1008.8 1016.0 1020.1 1018.3 1013.6 MAX. QFF PRESSURE IN HPA 1036.2 1036.9 1021.7 1019.3 1020.2 1008.7 1006.6 1010.5 1022.0 1026.4 1028.5 1025.2 1036.9 DAY 28 4 1 2 1 2 19 19 23 24 8 18 MIN. QFF PRESSURE IN HPA 1010.3 1013.6 999.5 1006.5 1001.0 997.6 997.5 997.1 1000.0 1004.1 1011.9 1012.5 997.1 DAY 17 23 28 14 31 23 6 1 12 2 15 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.1 1.1 6.8 13.0 20.4 26.3 26.1 25.8 23.3 14.6 10.9 1.4 14.0 MINIMUN AIR TEMPERATURE (C) -5.0 -3.0 0.4 6.2 11.2 15.6 16.8 16.5 12.5 5.8 2.9 -4.5 6.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 16 10 6 0 0 0 0 0 0 0 0 13 45 DAYS WITH FREEZING MIN.<= 0 28 24 11 0 0 0 0 0 0 2 8 24 97 TEMPERATURE RECORDS LOWEST(C) -12.8 -11.8 -5.8 1.4 6.8 11.8 13.0 13.8 7.8 -1.4 -2.2 -20.2 -20.2 DAY 14 8 19 8 15 3 14 14 29 17 18 27 MAXIMUM AIR TEMPERATURE (C) 2.1 4.5 12.2 18.1 25.9 31.9 31.2 31.6 29.8 20.7 16.6 6.1 19.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 4 22 24 21 15 0 0 0 88 DAYS WITH MAXIMUM TEMP. <= 0 9 5 1 0 0 0 0 0 0 0 0 8 23 TEMPERATURE RECORDS HIGHEST(C) 7.6 14.6 19.0 31.2 33.0 37.4 36.4 36.4 36.4 27.8 24.6 19.2 37.4 DAY 4 19 8 29 19 27 30 7 14 1 12 6 DIF. BETWEEN (MAX.-MIN.) (C) 7.1 7.5 11.8 11.9 14.7 16.3 14.4 15.1 17.3 14.9 13.7 10.6 13.0 MEAN DAILY TEMP. (MDT) (C) -1.4 0.7 6.3 12.1 18.6 23.8 24.0 24.1 21.2 13.3 9.8 0.8 12.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.4 8.2 86.9 93.7 95.4 31.6 0.0 0.0 0.0 317.2 HEATING DEG. DAYS(BASE 18 0C) 602.8 483.3 362.6 184.3 21.9 0.0 0.0 0.0 1.1 146.8 246.7 533.4 2582.8 DEWPOINT (MEAN C) -4.7 -3.2 -1.9 3.7 5.2 6.7 7.8 8.0 3.3 2.2 0.0 -5.5 1.8 MIXING RATIO (G/KG) 3.19 3.56 3.95 5.86 6.60 7.38 7.93 8.15 5.89 5.34 4.48 3.10 5.45 VAPOUR PRESSURE (HPA) 4.45 4.95 5.50 8.10 9.11 10.15 10.91 11.23 8.16 7.43 6.26 4.33 7.55 SATURATION DEF. (HPA) 1.40 1.97 5.18 8.02 16.00 25.47 24.11 23.32 22.07 10.37 7.83 3.40 12.43 RELATIVE HUMIDITY (MEAN %) 78 75 59 59 41 33 35 37 31 48 52 65 51 RELATIVE HUMIDITY (MAX. %) 88 89 83 82 65 55 57 60 52 71 76 81 72 RELATIVE HUMIDITY (MIN. %) 67 63 41 42 28 20 23 23 19 30 34 51 37 RELATIVE HUMIDITY (MEAN% 03UTC) 87 88 82 82 64 55 56 60 51 70 75 79 71 RELATIVE HUMIDITY (MEAN% 09UTC) 72 69 47 48 31 23 26 26 23 34 38 54 41 RELATIVE HUMIDITY (MEAN% 15UTC) 78 75 57 57 39 28 29 31 27 50 57 70 50 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 33.0 56.9 24.2 51.0 5.7 0.8 0.9 0.0 0.0 13.4 14.4 36.3 236.6 DAYS WITH PRECIPITATION >=10 1 2 0 0 0 0 0 0 0 1 1 0 5 DAYS WITH PRECIPITATION >= 5 2 3 3 5 0 0 0 0 0 1 1 4 19 DAYS WITH PRECIPITATION >= 1 8 8 4 13 2 0 0 0 0 3 2 8 48 DAYS WITH PRECIPITATION 17 13 7 14 4 2 2 0 0 6 3 9 77 GREATEST DAILY PRECIPITATION 13.0 22.0 7.0 8.3 4.0 0.4 0.9 0.0 0.0 10.0 11.3 8.2 22.0 DAY 7 16 16 6 14 12 7 ** ** 30 14 25 DAY WITH THUNDER STORM 0 1 0 2 3 1 0 0 0 1 0 0 8 DAYS WITH SNOW OR SLEET 15 11 6 0 0 0 0 0 0 0 0 7 39 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 135 270 315 315 135 45 45 45 135 315 135 135 135 PREVAILING WIND SPEED(KNOTS) 6.2 5.3 6.7 7.0 8.0 8.9 8.8 9.4 7.1 6.6 7.1 6.3 7.1 PREVAILING WIND PERCENT 19.4 11.4 24.5 26.7 31.0 21.3 29.0 24.5 22.7 16.1 13.3 18.1 16.2 CALMS PERCENT OF WIND 52.9 62.9 31.0 27.3 15.5 16.7 21.3 20.0 29.3 52.9 67.3 67.7 38.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 199 275 287 207 113 60 55 74 94 204 171 163 88 VECTOR WIND MAGNITUDE(KNOTS) 0.4 0.6 1.3 0.6 2.9 2.4 3.7 3.3 2.6 0.3 0.8 0.9 1.0 WIND STEADINESES (MEAN %) 14.3 30.0 27.1 12.0 44.6 39.3 62.7 55.0 53.1 10.0 36.4 40.9 23.3 WIND SPEED (MEAN KNOTS) 2.8 2.0 4.8 5.0 6.5 6.1 5.9 6.0 4.9 3.0 2.2 2.2 4.3 FASTEST WIND DIRECTION 150 150 300 150 60 60 60 60 150 140 290 300 300 FASTEST WIND SPEED (KNOTS) 12 12 14 12 16 14 14 14 14 14 12 17 17 DAY 6 16 5 3 23 21 2 8 1 14 1 7 DAYS WITH SKY CLEAR (0-2)/8 6 9 12 8 23 29 25 31 29 19 20 13 224 DAYS WITH P.CLOUDY (3-6)/8 10 7 11 16 7 1 3 0 1 11 9 10 86 DAYS WITH CLOUDY (7-8)/8 15 12 8 6 1 0 3 0 0 1 1 8 55 DAYS WITH VISIBILITY =< 2 KM 1 2 0 0 0 0 0 0 0 0 1 0 4 DURATION OF SUNSHINE HOURS 91.0 123.5 183.4 204.6 311.4 342.9 323.0 335.2 297.6 236.4 227.0 136.1 2812.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.9 869.2 872.5 868.2 869.5 867.2 867.5 869.1 870.4 873.7 874.2 872.7 870.5 MAX. QFE PRESSURE IN HPA 878.8 879.7 882.3 875.4 877.1 872.5 871.8 873.8 876.0 883.4 883.2 880.2 883.4 DAY-HOUR 26-15 8- 6 17- 6 3- 6 16- 6 5- 3 17- 3 29- 3 16- 6 15-15 22- 6 29- 6 MIN. QFE PRESSURE IN HPA 864.8 855.9 865.3 858.8 857.0 861.0 863.3 863.9 864.8 867.1 865.0 862.6 855.9 DAY-HOUR 23-12 16- 3 24-12 15-12 13- 9 27-15 4-12 7-12 1-12 14-12 1- 9 25-12 MEAN QNH PRESSURE IN HPA 1017.5 1014.5 1018.2 1013.3 1014.8 1012.2 1012.6 1014.4 1015.8 1019.5 1020.1 1018.4 1015.9 MAX. QNH PRESSURE IN HPA 1025.3 1026.4 1029.3 1021.5 1023.4 1018.2 1017.4 1019.7 1022.2 1030.5 1030.3 1026.9 1030.5 DAY-HOUR 26-15 8- 6 17- 6 3- 6 16- 6 5- 3 17- 3 29- 3 16- 6 15-15 22- 6 29- 6 MIN. QNH PRESSURE IN HPA 1009.5 999.4 1010.0 1002.7 1000.6 1005.2 1007.8 1008.4 1009.5 1012.1 1009.7 1007.0 999.4 DAY-HOUR 23-12 16- 3 24-12 15-12 13- 9 27-15 4-12 7-12 1-12 14-12 1- 9 25-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 871.7 869.2 872.9 868.7 870.7 868.4 868.5 870.3 871.4 874.4 874.6 872.9 871.1 MAX. QFE PRESSURE IN HPA 878.2 878.6 882.2 875.1 877.0 872.5 871.8 873.8 875.6 882.8 882.0 879.7 882.8 DAY 20 8 17 24 16 5 17 29 16 19 23 29 MIN. QFE PRESSURE IN HPA 865.0 855.9 867.0 861.2 859.0 863.3 865.6 866.3 868.2 869.3 865.5 866.7 855.9 DAY 5 16 25 16 13 27 28 8 14 26 1 18 MEAN QNH PRESSURE IN HPA 1017.3 1014.4 1018.6 1013.9 1016.1 1013.5 1013.6 1015.7 1016.9 1020.4 1020.5 1018.7 1016.6 MAX. QNH PRESSURE IN HPA 1024.7 1025.1 1029.2 1021.1 1023.3 1018.2 1017.4 1019.7 1021.7 1029.9 1029.0 1026.4 1029.9 DAY 20 8 17 24 16 5 17 29 16 19 23 29 MIN. QNH PRESSURE IN HPA 1009.7 999.4 1012.0 1005.4 1002.9 1007.8 1010.4 1011.2 1013.3 1014.6 1010.3 1011.6 999.4 DAY 5 16 25 16 13 27 28 8 14 26 1 18 MEAN QFF PRESSURE IN HPA 1022.7 1018.5 1020.1 1011.6 1010.3 1004.6 1004.5 1007.1 1010.4 1018.2 1020.5 1023.3 1014.3 MAX. QFF PRESSURE IN HPA 1033.8 1033.4 1035.4 1020.8 1020.5 1011.5 1008.0 1011.8 1015.5 1032.1 1030.7 1036.0 1036.0 DAY 27 8 17 24 15 7 15 30 24 19 23 29 MIN. QFF PRESSURE IN HPA 1010.7 999.2 1010.1 1001.9 994.4 997.0 1000.4 1001.5 1004.3 1010.1 1007.9 1013.1 994.4 DAY 5 16 25 16 13 27 28 8 14 26 1 18 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 872.8 870.1 873.6 869.1 870.6 868.3 868.3 870.3 871.6 874.9 875.3 873.6 871.5 MAX. QFE PRESSURE IN HPA 878.7 879.7 882.3 875.4 877.1 872.2 871.6 873.6 876.0 883.4 883.2 880.2 883.4 DAY 27 8 17 3 16 5 17 29 16 19 22 29 MIN. QFE PRESSURE IN HPA 865.9 857.9 867.7 862.0 859.3 863.0 865.9 866.3 868.5 869.3 866.4 867.2 857.9 DAY 5 16 25 16 13 27 4 7 5 26 1 25 MEAN QNH PRESSURE IN HPA 1018.5 1015.4 1019.4 1014.4 1016.0 1013.4 1013.5 1015.7 1017.2 1020.9 1021.3 1019.5 1017.1 MAX. QNH PRESSURE IN HPA 1025.2 1026.4 1029.3 1021.5 1023.4 1017.9 1017.2 1019.4 1022.2 1030.5 1030.3 1026.9 1030.5 DAY 27 8 17 3 16 5 17 29 16 19 22 29 MIN. QNH PRESSURE IN HPA 1010.7 1001.6 1012.8 1006.3 1003.2 1007.4 1010.7 1011.2 1013.7 1014.6 1011.3 1012.2 1001.6 DAY 5 16 25 16 13 27 4 7 5 26 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 871.7 869.3 872.5 868.2 869.3 867.1 867.4 868.9 870.1 873.2 873.7 872.3 870.3 MAX. QFE PRESSURE IN HPA 878.1 878.6 881.6 874.4 875.5 870.2 870.9 871.9 874.1 882.9 881.6 878.7 882.9 DAY 26 8 17 3 15 1 17 2 16 15 22 29 MIN. QFE PRESSURE IN HPA 865.5 859.3 867.5 861.2 857.0 862.0 864.1 865.0 866.7 867.3 865.0 863.6 857.0 DAY 23 16 14 15 13 27 5 7 1 14 1 25 MEAN QNH PRESSURE IN HPA 1017.3 1014.6 1018.2 1013.3 1014.6 1012.0 1012.4 1014.1 1015.5 1019.0 1019.5 1018.0 1015.7 MAX. QNH PRESSURE IN HPA 1024.5 1025.1 1028.5 1020.3 1021.6 1015.6 1016.4 1017.5 1020.0 1030.0 1028.5 1025.2 1030.0 DAY 26 8 17 3 15 1 17 2 16 15 22 29 MIN. QNH PRESSURE IN HPA 1010.3 1003.2 1012.5 1005.4 1000.6 1006.3 1008.7 1009.7 1011.6 1012.3 1009.7 1008.1 1000.6 DAY 23 16 14 15 13 27 5 7 1 14 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 871.3 868.5 871.4 867.1 868.2 866.0 866.7 867.9 869.1 872.5 873.1 871.9 869.5 MAX. QFE PRESSURE IN HPA 878.0 877.6 880.4 873.4 874.6 869.2 870.2 871.2 872.9 882.3 881.3 877.8 882.3 DAY 26 8 17 3 15 1 15 2 16 15 22 28 MIN. QFE PRESSURE IN HPA 864.8 859.6 865.3 858.8 857.8 861.1 863.3 863.9 864.8 867.1 865.2 862.6 857.8 DAY 23 16 24 15 13 27 4 7 1 14 1 25 MEAN QNH PRESSURE IN HPA 1016.8 1013.7 1016.9 1012.1 1013.4 1010.9 1011.6 1012.9 1014.3 1018.1 1018.9 1017.5 1014.8 MAX. QNH PRESSURE IN HPA 1024.4 1024.0 1027.1 1019.2 1020.6 1014.4 1015.6 1016.7 1018.6 1029.3 1028.2 1024.2 1029.3 DAY 26 8 17 3 15 1 15 2 16 15 22 28 MIN. QNH PRESSURE IN HPA 1009.5 1003.6 1010.0 1002.7 1001.5 1005.3 1007.8 1008.4 1009.5 1012.1 1009.9 1007.0 1001.5 DAY 23 16 24 15 13 27 4 7 1 14 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.9 869.1 872.1 867.9 869.0 866.3 866.9 868.4 869.6 873.6 874.3 872.9 870.2 MAX. QFE PRESSURE IN HPA 878.8 878.0 881.6 874.1 875.8 869.7 870.5 871.8 873.6 883.4 882.8 878.9 883.4 DAY 26 8 9 3 15 7 16 29 23 15 22 28 MIN. QFE PRESSURE IN HPA 864.9 861.4 865.3 860.3 860.7 861.0 863.6 864.2 865.1 867.7 868.2 863.4 860.3 DAY 17 15 24 15 13 27 4 7 1 31 1 25 MEAN QNH PRESSURE IN HPA 1017.5 1014.4 1017.7 1012.9 1014.2 1011.2 1011.8 1013.5 1014.9 1019.4 1020.2 1018.6 1015.5 MAX. QNH PRESSURE IN HPA 1025.3 1024.4 1028.5 1020.0 1021.9 1015.0 1015.9 1017.4 1019.4 1030.5 1029.9 1025.4 1030.5 DAY 26 8 9 3 15 7 16 29 23 15 22 28 MIN. QNH PRESSURE IN HPA 1009.6 1005.6 1010.0 1004.4 1004.8 1005.2 1008.1 1008.8 1009.8 1012.8 1013.3 1007.9 1004.4 DAY 17 15 24 15 13 27 4 7 1 31 1 25 MEAN QFF PRESSURE IN HPA 1022.9 1018.3 1019.1 1010.5 1008.3 1002.3 1002.8 1004.9 1008.4 1017.2 1020.1 1023.3 1013.2 MAX. QFF PRESSURE IN HPA 1032.0 1032.9 1034.3 1020.3 1019.1 1009.1 1006.2 1010.3 1014.6 1031.9 1029.9 1036.3 1036.3 DAY 26 8 17 3 15 7 15 29 27 15 22 29 MIN. QFF PRESSURE IN HPA 1013.8 1006.2 1007.6 999.6 996.5 993.8 999.0 998.6 1000.8 1009.8 1010.2 1013.3 993.8 DAY 23 15 14 29 12 27 30 7 1 3 12 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.4 1.7 5.8 15.0 16.8 23.3 26.2 23.2 19.0 12.7 6.5 2.8 12.7 MINIMUN AIR TEMPERATURE (C) -5.1 -3.0 1.9 7.6 9.2 13.8 16.5 15.0 12.0 6.0 1.5 -1.2 6.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 18 8 2 0 0 0 0 0 0 0 3 9 40 DAYS WITH FREEZING MIN.<= 0 31 19 9 1 0 0 0 0 0 0 11 20 91 TEMPERATURE RECORDS LOWEST(C) -14.8 -13.8 -7.2 0.0 4.4 9.2 13.0 8.4 4.4 0.6 -5.0 -7.8 -14.8 DAY 2 13 13 14 5 24 15 23 29 14 29 21 MAXIMUM AIR TEMPERATURE (C) 3.5 5.6 9.1 20.3 21.6 28.3 31.2 31.0 27.0 20.5 13.2 8.6 18.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 8 23 21 11 0 0 0 64 DAYS WITH MAXIMUM TEMP. <= 0 1 5 0 0 0 0 0 0 0 0 0 0 6 TEMPERATURE RECORDS HIGHEST(C) 9.4 18.0 18.4 27.4 30.6 32.6 37.0 36.0 34.6 25.4 22.4 16.8 37.0 DAY 14 27 31 25 30 12 7 6 21 26 5 10 DIF. BETWEEN (MAX.-MIN.) (C) 8.6 8.6 7.2 12.7 12.4 14.5 14.7 16.0 15.0 14.5 11.7 9.8 12.1 MEAN DAILY TEMP. (MDT) (C) -0.8 1.3 5.5 13.9 15.4 21.0 23.8 23.0 19.5 13.2 7.3 3.7 12.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 2.3 21.5 88.3 67.5 25.5 0.0 0.0 0.0 205.1 HEATING DEG. DAYS(BASE 18 0C) 583.0 467.3 387.8 127.7 96.6 1.4 0.0 0.0 37.4 147.3 319.5 442.5 2610.5 DEWPOINT (MEAN C) -4.8 -3.8 1.8 4.3 7.1 8.0 8.2 4.7 5.9 1.5 -0.5 -2.5 2.5 MIXING RATIO (G/KG) 3.21 3.46 5.16 6.14 7.53 8.01 8.08 6.59 7.03 5.03 4.41 3.77 5.70 VAPOUR PRESSURE (HPA) 4.48 4.82 7.15 8.50 10.36 11.03 11.11 9.10 9.74 7.01 6.15 5.24 7.89 SATURATION DEF. (HPA) 1.60 2.59 2.57 9.77 9.75 18.64 24.20 20.74 13.97 8.42 4.06 2.68 9.91 RELATIVE HUMIDITY (MEAN %) 75 71 77 54 57 41 36 34 48 50 64 71 57 RELATIVE HUMIDITY (MAX. %) 87 87 90 80 80 64 58 56 70 72 85 87 76 RELATIVE HUMIDITY (MIN. %) 62 55 66 35 43 29 25 19 28 29 41 50 40 RELATIVE HUMIDITY (MEAN% 03UTC) 84 86 89 79 78 64 54 52 66 68 79 83 74 RELATIVE HUMIDITY (MEAN% 09UTC) 70 61 70 43 48 32 29 21 33 35 46 54 45 RELATIVE HUMIDITY (MEAN% 15UTC) 80 73 79 51 54 35 33 24 38 43 61 71 54 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 41.8 44.2 94.4 42.9 61.9 0.8 3.7 0.0 10.1 3.3 13.2 27.6 343.9 DAYS WITH PRECIPITATION >=10 2 3 3 1 3 0 0 0 1 0 0 1 14 DAYS WITH PRECIPITATION >= 5 4 3 7 3 4 0 0 0 1 0 1 3 26 DAYS WITH PRECIPITATION >= 1 7 8 12 7 9 0 2 0 1 1 3 3 53 DAYS WITH PRECIPITATION 13 14 16 11 14 1 3 0 2 5 7 8 94 GREATEST DAILY PRECIPITATION 11.0 13.0 26.0 17.0 18.0 0.8 2.0 0.0 10.0 1.7 8.0 14.0 26.0 DAY 15 22 7 13 11 6 14 ** 27 17 7 13 DAY WITH THUNDER STORM 0 0 0 2 7 0 0 0 0 1 0 0 10 DAYS WITH SNOW OR SLEET 8 8 6 0 0 0 0 0 0 0 0 5 27 DAYS WITH DUST 0 0 0 0 0 0 0 0 1 0 0 0 1 WIND DIRECTION (PREVAILING) 135 135 135 315 315 90 90 90 90 90 315 135 315 PREVAILING WIND SPEED(KNOTS) 5.5 5.9 7.9 7.0 6.8 7.6 6.5 7.0 6.4 4.8 5.4 7.4 6.5 PREVAILING WIND PERCENT 11.0 15.7 26.5 22.7 23.9 21.3 27.1 25.1 15.0 8.1 14.2 11.2 11.6 CALMS PERCENT OF WIND 80.0 63.6 34.8 42.0 36.1 25.3 28.4 43.9 47.0 69.4 66.7 66.8 52.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 239 234 248 240 241 2262 VECTOR WIND DIRECTION (MEAN) 158 195 159 280 259 62 69 73 79 98 248 189 88 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.5 1.7 0.8 0.4 2.6 2.8 3.0 0.8 0.4 0.3 0.5 0.7 WIND STEADINESES (MEAN %) 25.0 21.7 34.7 19.0 9.5 47.3 58.3 75.0 22.9 25.0 15.0 22.7 20.6 WIND SPEED (MEAN KNOTS) 1.2 2.3 4.9 4.2 4.2 5.5 4.8 4.0 3.5 1.6 2.0 2.2 3.4 FASTEST WIND DIRECTION 280 300 180 320 130 300 290 60 140 60 160 300 300 FASTEST WIND SPEED (KNOTS) 10 12 16 16 16 17 16 16 14 10 14 14 17 DAY 5 5 5 1 3 3 8 21 8 8 3 26 DAYS WITH SKY CLEAR (0-2)/8 10 7 3 10 10 24 27 29 23 20 13 12 188 DAYS WITH P.CLOUDY (3-6)/8 8 11 10 15 15 5 3 2 6 10 14 13 112 DAYS WITH CLOUDY (7-8)/8 13 10 18 5 6 1 1 0 1 1 3 6 65 DAYS WITH VISIBILITY =< 2 KM 5 0 4 0 0 0 0 0 0 0 1 3 13 DURATION OF SUNSHINE HOURS 116.8 128.5 97.0 240.9 227.1 334.2 341.9 342.5 274.7 234.4 178.4 137.2 2653.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.5 871.9 870.1 869.9 867.5 868.5 866.8 868.5 872.2 874.5 874.8 870.1 870.5 MAX. QFE PRESSURE IN HPA 879.5 881.1 876.8 877.3 873.4 874.7 871.9 873.0 877.8 878.6 879.4 879.4 881.1 DAY-HOUR 11- 6 15- 6 12-15 29- 6 25- 9 17- 3 11- 6 22- 3 17- 6 21- 6 27- 6 17- 6 MIN. QFE PRESSURE IN HPA 862.0 863.5 855.8 859.0 858.1 860.1 859.7 862.2 864.6 869.1 867.3 860.7 855.8 DAY-HOUR 5- 3 4-12 7- 3 5- 3 22- 9 12-12 7-15 11-12 3-12 4-12 5-12 26- 0 MEAN QNH PRESSURE IN HPA 1017.0 1017.5 1015.5 1015.2 1012.5 1013.7 1011.7 1013.6 1017.9 1020.4 1020.8 1015.4 1015.9 MAX. QNH PRESSURE IN HPA 1026.1 1027.9 1023.1 1023.6 1019.2 1020.7 1017.5 1018.8 1024.2 1025.1 1026.0 1026.0 1027.9 DAY-HOUR 11- 6 15- 6 12-15 29- 6 25- 9 17- 3 11- 6 22- 3 17- 6 21- 6 27- 6 17- 6 MIN. QNH PRESSURE IN HPA 1006.3 1008.0 999.3 1002.9 1001.9 1004.1 1003.7 1006.5 1009.2 1014.3 1012.3 1004.8 999.3 DAY-HOUR 5- 3 4-12 7- 3 5- 3 22- 9 12-12 7-15 11-12 3-12 4-12 5-12 26- 0 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.7 1011.2 1017.0 1020.9 1017.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1013.8 1021.1 1023.5 1029.3 1031.3 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 22- 3 28-18 14- 3 24- 3 17- 6 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.3 999.7 1009.0 1008.1 1004.3 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 6-12 7-12 4-12 5- 9 1-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 868.5 872.1 874.3 874.8 870.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 872.1 876.8 877.2 878.1 877.8 ****** DAY ** ** ** ** ** ** ** 22 16 13 24 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 864.4 866.6 870.4 868.9 860.7 ****** DAY ** ** ** ** ** ** ** 12 20 5 5 26 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1013.6 1017.8 1020.3 1020.9 1015.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1017.7 1023.1 1023.5 1024.5 1024.2 ****** DAY ** ** ** ** ** ** ** 22 16 13 24 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1009.0 1011.5 1015.8 1014.1 1004.8 ****** DAY ** ** ** ** ** ** ** 12 20 5 5 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.6 1010.5 1016.5 1020.3 1017.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.2 1020.2 1021.4 1026.9 1028.7 ****** DAY ** ** ** ** ** ** ** 22 28 14 27 18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.5 1002.3 1009.7 1010.3 1005.0 ****** DAY ** ** ** ** ** ** ** 6 8 5 5 26 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 871.4 872.0 870.2 870.4 867.8 869.3 867.6 869.4 872.9 874.9 875.3 870.4 871.0 MAX. QFE PRESSURE IN HPA 878.6 880.0 875.3 877.0 872.6 874.7 871.2 873.0 877.7 878.2 878.7 878.5 880.0 DAY 12 15 12 29 25 17 12 22 17 21 24 17 MIN. QFE PRESSURE IN HPA 862.0 863.9 855.8 859.0 859.2 862.8 860.5 865.0 867.3 871.2 868.5 861.7 855.8 DAY 5 4 7 5 23 12 8 6 20 5 5 26 MEAN QNH PRESSURE IN HPA 1016.9 1017.7 1015.5 1015.8 1012.9 1014.6 1012.7 1014.6 1018.6 1020.9 1021.4 1015.8 1016.4 MAX. QNH PRESSURE IN HPA 1025.1 1026.7 1021.4 1023.3 1018.3 1020.7 1016.7 1018.8 1024.1 1024.7 1025.2 1025.0 1026.7 DAY 12 15 12 29 25 17 12 22 17 21 24 17 MIN. QNH PRESSURE IN HPA 1006.3 1008.4 999.3 1002.9 1003.1 1007.2 1004.6 1009.7 1012.3 1016.7 1013.7 1005.9 999.3 DAY 5 4 7 5 23 12 8 6 20 5 5 26 MEAN QFF PRESSURE IN HPA 1022.2 1021.7 1016.7 1012.4 1008.3 1006.8 1003.6 1006.6 1012.6 1018.7 1022.4 1018.6 1014.2 MAX. QFF PRESSURE IN HPA 1032.0 1034.9 1027.8 1022.5 1016.5 1013.5 1008.7 1013.8 1020.9 1023.5 1029.3 1029.8 1034.9 DAY 12 15 12 15 25 24 12 22 30 14 24 17 MIN. QFF PRESSURE IN HPA 1008.9 1009.5 998.5 996.5 997.8 997.2 992.0 999.6 1004.8 1012.3 1011.1 1007.8 992.0 DAY 5 4 7 5 23 12 8 6 3 5 5 2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 872.3 872.9 870.9 870.9 868.0 869.3 867.6 869.3 873.1 875.4 875.9 871.0 871.4 MAX. QFE PRESSURE IN HPA 879.5 881.1 876.7 877.3 873.0 874.2 871.9 873.0 877.8 878.6 879.4 879.4 881.1 DAY 11 15 12 29 25 17 11 22 17 21 27 17 MIN. QFE PRESSURE IN HPA 863.0 864.8 857.3 862.2 859.0 863.0 861.8 864.8 867.7 871.8 868.7 864.6 857.3 DAY 5 4 7 5 23 12 8 12 3 4 5 26 MEAN QNH PRESSURE IN HPA 1018.0 1018.6 1016.3 1016.4 1013.1 1014.5 1012.6 1014.6 1018.9 1021.5 1022.0 1016.5 1016.9 MAX. QNH PRESSURE IN HPA 1026.1 1027.9 1022.9 1023.6 1018.8 1020.1 1017.5 1018.8 1024.2 1025.1 1026.0 1026.0 1027.9 DAY 11 15 12 29 25 17 11 22 17 21 27 17 MIN. QNH PRESSURE IN HPA 1007.4 1009.5 1001.0 1006.5 1002.9 1007.4 1006.1 1009.5 1012.8 1017.4 1013.9 1009.2 1001.0 DAY 5 4 7 5 23 12 8 12 3 4 5 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1005.6 1012.0 1018.0 1022.4 1018.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.4 1021.0 1022.9 1029.2 1031.3 ****** DAY ** ** ** ** ** ** ** 22 28 13 27 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.2 1003.4 1012.5 1010.5 1008.5 ****** DAY ** ** ** ** ** ** ** 6 8 5 5 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 871.2 871.8 870.1 869.8 867.2 868.4 866.7 868.1 871.7 874.2 874.4 869.7 870.3 MAX. QFE PRESSURE IN HPA 878.2 880.7 876.7 875.4 873.4 873.4 871.5 872.0 876.1 877.2 878.2 877.3 880.7 DAY 11 15 12 29 25 17 11 22 17 21 23 17 MIN. QFE PRESSURE IN HPA 862.6 863.9 857.2 861.2 858.1 861.0 861.9 863.6 865.8 870.4 867.6 864.3 857.2 DAY 25 4 7 10 22 12 7 11 3 4 5 1 MEAN QNH PRESSURE IN HPA 1016.7 1017.4 1015.5 1015.1 1012.2 1013.5 1011.7 1013.2 1017.3 1020.1 1020.3 1015.0 1015.7 MAX. QNH PRESSURE IN HPA 1024.7 1027.5 1022.9 1021.5 1019.2 1019.2 1017.1 1017.6 1022.3 1023.5 1024.7 1023.6 1027.5 DAY 11 15 12 29 25 17 11 22 17 21 23 17 MIN. QNH PRESSURE IN HPA 1007.0 1008.4 1000.8 1005.4 1001.9 1005.2 1006.2 1008.1 1010.6 1015.8 1012.6 1008.9 1000.8 DAY 25 4 7 10 22 12 7 11 3 4 5 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.3 1011.0 1016.0 1019.7 1016.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1009.6 1020.5 1021.5 1026.9 1028.3 ****** DAY ** ** ** ** ** ** ** 22 27 12 27 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.2 1001.9 1010.2 1008.1 1006.2 ****** DAY ** ** ** ** ** ** ** 6 8 4 5 1 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 870.9 871.0 869.4 868.9 866.8 867.7 866.0 867.3 870.7 873.4 873.7 869.2 869.6 MAX. QFE PRESSURE IN HPA 877.8 879.9 876.6 874.2 873.2 873.3 870.7 871.2 875.4 876.7 877.8 876.5 879.9 DAY 12 15 12 15 25 17 11 22 30 21 24 17 MIN. QFE PRESSURE IN HPA 862.8 863.5 858.9 860.0 858.1 860.1 860.3 862.2 864.6 869.1 867.3 862.6 858.1 DAY 25 4 7 10 22 12 7 11 3 4 5 1 MEAN QNH PRESSURE IN HPA 1016.4 1016.5 1014.6 1014.1 1011.7 1012.8 1010.8 1012.2 1016.2 1019.2 1019.5 1014.5 1014.9 MAX. QNH PRESSURE IN HPA 1024.2 1026.6 1022.8 1020.1 1019.0 1019.1 1016.1 1016.7 1021.5 1022.9 1024.2 1022.7 1026.6 DAY 12 15 12 15 25 17 11 22 30 21 24 17 MIN. QNH PRESSURE IN HPA 1007.2 1008.0 1002.8 1004.0 1001.9 1004.1 1004.4 1006.5 1009.2 1014.3 1012.3 1007.0 1001.9 DAY 25 4 7 10 22 12 7 11 3 4 5 1 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.2 1009.0 1015.4 1018.9 1016.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1010.1 1020.3 1020.3 1026.3 1027.3 ****** DAY ** ** ** ** ** ** ** 22 27 12 27 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.3 999.7 1009.0 1008.2 1004.3 ****** DAY ** ** ** ** ** ** ** 6 7 4 5 1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.6 871.6 870.1 869.4 867.4 868.1 866.2 867.7 871.5 874.2 874.6 870.0 870.2 MAX. QFE PRESSURE IN HPA 878.7 879.6 876.8 874.5 872.4 873.6 870.9 871.3 876.5 877.6 878.8 876.9 879.6 DAY 11 15 12 28 4 17 11 22 30 13 27 17 MIN. QFE PRESSURE IN HPA 864.0 863.7 860.1 861.6 859.3 861.3 859.7 862.5 865.5 869.7 869.2 862.8 859.3 DAY 3 4 7 4 22 11 7 11 7 4 5 1 MEAN QNH PRESSURE IN HPA 1017.2 1017.2 1015.4 1014.7 1012.4 1013.2 1011.0 1012.8 1017.1 1020.1 1020.5 1015.4 1015.6 MAX. QNH PRESSURE IN HPA 1025.2 1026.2 1023.1 1020.5 1018.1 1019.4 1016.4 1016.8 1022.7 1024.0 1025.3 1023.2 1026.2 DAY 11 15 12 28 4 17 11 22 30 13 27 17 MIN. QNH PRESSURE IN HPA 1008.6 1008.2 1004.1 1005.8 1003.2 1005.5 1003.7 1006.9 1010.3 1015.0 1014.4 1007.2 1003.2 DAY 3 4 7 4 22 11 7 11 7 4 5 1 MEAN QFF PRESSURE IN HPA 1022.3 1021.1 1016.4 1011.3 1007.8 1005.4 1001.9 1004.8 1011.2 1017.8 1021.5 1018.2 1013.3 MAX. QFF PRESSURE IN HPA 1031.3 1033.8 1028.9 1020.9 1015.6 1012.4 1008.5 1011.8 1020.6 1023.0 1028.7 1029.0 1033.8 DAY 12 14 12 14 25 23 11 22 30 13 27 17 MIN. QFF PRESSURE IN HPA 1013.0 1009.0 1005.8 1000.4 996.6 995.9 991.9 998.7 1001.7 1010.9 1011.9 1005.8 991.9 DAY 25 4 7 4 22 11 7 11 7 4 5 1 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 869.1 872.8 874.8 875.2 870.4 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 872.6 877.4 878.5 878.4 877.3 ****** DAY ** ** ** ** ** ** ** 31 30 20 23 17 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 864.2 866.5 870.4 870.4 862.7 ****** DAY ** ** ** ** ** ** ** 11 19 4 5 25 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1014.3 1018.6 1020.8 1021.2 1015.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1018.3 1023.7 1025.0 1024.9 1023.6 ****** DAY ** ** ** ** ** ** ** 31 30 20 23 17 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.8 1011.4 1015.8 1015.8 1007.1 ****** DAY ** ** ** ** ** ** ** 11 19 4 5 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1005.3 1011.8 1017.3 1021.6 1018.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1010.5 1021.1 1023.1 1028.6 1029.7 ****** DAY ** ** ** ** ** ** ** 21 28 13 24 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.0 1002.0 1010.5 1012.9 1007.4 ****** DAY ** ** ** ** ** ** ** 11 21 4 5 1 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 868.6 873.0 874.6 875.0 869.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 872.4 877.2 877.9 878.2 877.0 ****** DAY ** ** ** ** ** ** ** 21 15 20 23 16 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 863.8 866.5 871.0 870.0 860.8 ****** DAY ** ** ** ** ** ** ** 11 19 4 4 25 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1013.8 1018.8 1020.6 1021.0 1015.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1018.1 1023.5 1024.3 1024.7 1023.3 ****** DAY ** ** ** ** ** ** ** 21 15 20 23 16 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.3 1011.4 1016.5 1015.4 1004.9 ****** DAY ** ** ** ** ** ** ** 11 19 4 4 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.9 1011.8 1016.6 1020.4 1017.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1010.2 1020.5 1022.2 1026.9 1028.9 ****** DAY ** ** ** ** ** ** ** 21 27 13 24 17 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.4 1001.7 1010.5 1011.5 1004.3 ****** DAY ** ** ** ** ** ** ** 11 7 4 5 1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.3 1.3 2.3 10.1 13.2 21.1 24.4 20.8 17.3 12.0 8.9 2.8 11.1 MINIMUN AIR TEMPERATURE (C) -4.6 -3.0 -2.1 5.2 8.3 14.6 16.5 13.8 9.9 5.1 2.7 -0.6 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 13 12 8 0 0 0 0 0 0 0 3 2 38 DAYS WITH FREEZING MIN.<= 0 26 24 23 1 0 0 0 0 0 3 11 18 106 TEMPERATURE RECORDS LOWEST(C) -18.8 -9.8 -13.6 0.0 0.4 11.4 13.4 6.4 5.6 -2.8 -5.8 -10.4 -18.8 DAY 30 12 13 20 5 9 13 31 13 18 27 29 MAXIMUM AIR TEMPERATURE (C) 3.5 6.6 7.5 16.8 19.3 28.2 31.6 27.9 25.2 20.5 16.8 7.4 17.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 11 27 8 1 0 0 0 47 DAYS WITH MAXIMUM TEMP. <= 0 8 2 3 0 0 0 0 0 0 0 0 0 13 TEMPERATURE RECORDS HIGHEST(C) 11.4 15.0 19.4 26.6 27.8 34.2 35.2 35.0 31.8 26.0 24.6 16.2 35.2 DAY 20 25 30 13 30 19 5 23 25 11 12 16 DIF. BETWEEN (MAX.-MIN.) (C) 8.1 9.6 9.6 11.6 11.0 13.6 15.1 14.1 15.3 15.4 14.1 8.0 12.1 MEAN DAILY TEMP. (MDT) (C) -0.6 1.8 2.7 11.0 13.8 21.4 24.0 20.8 17.5 12.8 9.7 3.4 11.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 37.7 94.9 34.8 1.1 0.0 0.0 0.0 168.5 HEATING DEG. DAYS(BASE 18 0C) 576.4 470.0 474.0 184.8 136.2 1.6 0.0 8.2 31.3 161.5 248.2 452.1 2744.4 DEWPOINT (MEAN C) -5.2 -3.5 -2.1 3.9 6.6 10.5 8.5 6.3 1.8 0.4 -2.2 -0.9 2.0 MIXING RATIO (G/KG) 3.14 3.51 3.91 6.01 7.27 9.39 8.42 7.28 5.32 4.72 3.93 4.23 5.59 VAPOUR PRESSURE (HPA) 4.37 4.87 5.42 8.30 10.05 12.90 11.58 10.06 7.39 6.57 5.49 5.88 7.74 SATURATION DEF. (HPA) 1.59 2.24 2.21 4.72 6.15 13.24 20.21 15.67 13.37 8.51 6.91 1.88 8.06 RELATIVE HUMIDITY (MEAN %) 76 73 75 70 68 55 41 43 40 50 51 79 60 RELATIVE HUMIDITY (MAX. %) 89 87 90 88 85 79 63 66 62 72 73 90 79 RELATIVE HUMIDITY (MIN. %) 57 54 55 49 48 35 24 26 21 28 29 63 41 RELATIVE HUMIDITY (MEAN% 03UTC) 85 84 85 82 81 72 60 62 59 69 66 85 74 RELATIVE HUMIDITY (MEAN% 09UTC) 63 58 62 56 54 39 27 29 25 32 34 68 46 RELATIVE HUMIDITY (MEAN% 15UTC) 75 72 75 64 62 48 29 35 32 44 47 78 55 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 64.6 33.8 74.7 89.2 57.6 21.7 0.1 2.5 1.0 11.8 1.8 49.2 408.0 DAYS WITH PRECIPITATION >=10 2 2 3 2 2 0 0 0 0 0 0 3 14 DAYS WITH PRECIPITATION >= 5 5 2 7 6 5 2 0 0 0 1 0 4 32 DAYS WITH PRECIPITATION >= 1 8 8 9 12 10 5 0 1 1 3 1 7 65 DAYS WITH PRECIPITATION 16 11 20 15 14 10 1 4 1 3 2 10 107 GREATEST DAILY PRECIPITATION 16.0 10.0 13.0 34.0 14.9 7.3 0.1 2.2 1.0 7.8 1.8 14.0 34.0 DAY 17 11 10 19 13 7 8 12 18 7 26 28 DAY WITH THUNDER STORM 0 0 0 4 5 11 1 0 1 0 0 1 23 DAYS WITH SNOW OR SLEET 16 11 11 2 2 0 0 0 0 0 1 6 49 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 1 0 0 1 WIND DIRECTION (PREVAILING) 315 135 135 135 315 135 90 45 90 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 5.4 5.8 6.5 6.8 5.8 6.7 6.4 7.0 6.2 6.0 6.5 7.1 6.4 PREVAILING WIND PERCENT 12.5 12.1 19.7 16.7 13.7 15.4 20.0 16.9 14.2 16.1 19.2 17.3 13.5 CALMS PERCENT OF WIND 62.1 58.6 52.0 47.5 47.6 50.8 40.4 43.8 48.8 55.6 53.3 63.3 52.0 NO. OF WIND OBSERVATION 248 215 244 240 248 240 235 242 240 248 240 248 2888 VECTOR WIND DIRECTION (MEAN) 220 235 170 199 150 106 62 36 83 157 156 145 114 VECTOR WIND MAGNITUDE(KNOTS) 0.4 0.7 1.0 0.3 0.5 1.0 2.2 1.7 1.6 1.0 1.0 1.1 0.6 WIND STEADINESES (MEAN %) 19.0 28.0 33.3 8.3 16.1 30.3 56.4 47.2 47.1 38.5 33.3 44.0 19.4 WIND SPEED (MEAN KNOTS) 2.1 2.5 3.0 3.6 3.1 3.3 3.9 3.6 3.4 2.6 3.0 2.5 3.1 FASTEST WIND DIRECTION 240 200 300 300 160 150 60 70 70 310 320 160 300 FASTEST WIND SPEED (KNOTS) 14 16 16 17 14 16 14 16 16 16 14 14 17 DAY 1 25 25 15 21 17 8 17 9 6 26 3 DAYS WITH SKY CLEAR (0-2)/8 9 10 5 3 6 16 28 23 26 23 18 7 174 DAYS WITH P.CLOUDY (3-6)/8 13 12 16 19 16 13 3 6 4 5 10 14 131 DAYS WITH CLOUDY (7-8)/8 9 7 10 8 9 1 0 2 0 3 2 10 61 DAYS WITH VISIBILITY =< 2 KM 4 2 2 5 1 0 0 0 0 1 2 10 27 DURATION OF SUNSHINE HOURS 116.8 137.5 133.3 156.5 202.1 281.7 354.8 313.2 295.7 263.3 192.3 98.6 2545.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 870.4 867.3 869.6 868.7 870.6 867.5 867.9 870.5 872.5 873.2 873.5 871.5 870.3 MAX. QFE PRESSURE IN HPA 881.2 875.7 877.6 874.7 877.6 873.6 872.9 877.1 877.8 880.0 883.4 878.6 883.4 DAY-HOUR 10- 6 16- 6 12-18 30-18 2-18 6-18 6- 6 31- 6 30- 6 29-18 4- 6 2-18 MIN. QFE PRESSURE IN HPA 859.0 859.1 857.0 862.3 863.7 860.3 862.9 864.6 866.1 867.2 862.1 862.9 857.0 DAY-HOUR 3- 3 25- 9 31- 9 15- 9 10-12 19-12 10-12 1-12 17-15 24-12 26- 9 28- 9 MEAN QNH PRESSURE IN HPA 1015.8 1012.3 1014.9 1013.9 1016.1 1012.5 1013.0 1016.0 1018.2 1019.0 1019.3 1017.1 1015.7 MAX. QNH PRESSURE IN HPA 1028.0 1021.8 1024.0 1020.7 1024.0 1019.4 1018.6 1023.4 1024.2 1026.7 1030.5 1025.1 1030.5 DAY-HOUR 10- 6 16- 6 12-18 30-18 2-18 6-18 6- 6 31- 6 30- 6 29-18 4- 6 2-18 MIN. QNH PRESSURE IN HPA 1002.9 1003.0 1000.6 1006.6 1008.2 1004.4 1007.3 1009.2 1010.9 1012.2 1006.4 1007.3 1000.6 DAY-HOUR 3- 3 25- 9 31- 9 15- 9 10-12 19-12 10-12 1-12 17-15 24-12 26- 9 28- 9 MEAN QFF PRESSURE IN HPA 1020.2 1015.3 1017.3 1011.6 1012.2 1004.3 1003.5 1008.2 1012.3 1016.0 1018.0 1019.1 1013.2 MAX. QFF PRESSURE IN HPA 1035.6 1028.3 1032.6 1019.9 1025.5 1013.2 1011.1 1019.9 1020.8 1024.8 1030.0 1030.3 1035.6 DAY-HOUR 10- 3 16- 6 12-15 30-18 2-18 7- 3 13- 3 31- 3 30- 6 18- 3 4- 3 29- 6 MIN. QFF PRESSURE IN HPA 1004.1 999.6 996.6 1000.2 1000.8 993.6 997.4 1000.2 1002.8 1007.1 1002.6 1007.0 993.6 DAY-HOUR 3- 3 25- 0 31- 6 15- 6 10-12 19-12 10-12 26-12 17-21 24-12 26- 0 28- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 870.0 867.0 869.3 868.2 870.5 867.4 868.0 870.4 872.5 873.2 873.5 871.5 870.1 MAX. QFE PRESSURE IN HPA 880.3 873.5 876.4 871.6 876.0 873.0 871.8 875.5 876.6 879.1 882.4 878.4 882.4 DAY 5 16 13 8 3 7 8 31 30 30 4 3 MIN. QFE PRESSURE IN HPA 860.1 860.1 858.5 862.6 864.8 862.8 864.4 866.3 867.3 868.9 863.2 865.3 858.5 DAY 3 25 31 1 10 28 10 19 18 25 26 28 MEAN QNH PRESSURE IN HPA 1015.3 1012.0 1014.5 1013.3 1015.9 1012.5 1013.1 1015.8 1018.2 1018.9 1019.3 1017.0 1015.5 MAX. QNH PRESSURE IN HPA 1027.0 1019.3 1022.6 1017.2 1022.2 1018.8 1017.4 1021.6 1022.8 1025.7 1029.4 1024.9 1029.4 DAY 5 16 13 8 3 7 8 31 30 30 4 3 MIN. QNH PRESSURE IN HPA 1004.1 1004.1 1002.3 1007.0 1009.5 1007.2 1009.0 1011.2 1012.3 1014.1 1007.6 1010.0 1002.3 DAY 3 25 31 1 10 28 10 19 18 25 26 28 MEAN QFF PRESSURE IN HPA 1019.4 1014.4 1016.8 1010.8 1011.9 1004.3 1003.5 1007.7 1012.1 1015.4 1017.5 1018.6 1012.7 MAX. QFF PRESSURE IN HPA 1034.7 1024.8 1030.6 1018.3 1023.6 1011.9 1009.4 1017.5 1019.1 1023.9 1028.1 1027.9 1034.7 DAY 10 16 13 20 3 7 14 31 30 17 5 29 MIN. QFF PRESSURE IN HPA 1004.7 999.6 997.4 1003.3 1002.4 997.0 999.5 1001.6 1003.5 1008.0 1002.6 1010.9 997.0 DAY 3 25 31 23 10 27 10 25 18 14 26 28 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 870.0 867.4 869.7 868.7 871.0 868.2 868.7 871.2 873.2 873.7 873.8 871.6 870.6 MAX. QFE PRESSURE IN HPA 880.1 874.3 876.7 872.5 876.2 873.2 872.8 876.7 877.0 879.3 882.9 878.3 882.9 DAY 10 16 13 8 3 7 13 31 30 30 4 3 MIN. QFE PRESSURE IN HPA 859.0 860.9 857.1 863.6 865.9 862.8 864.6 866.4 868.4 869.9 862.4 865.8 857.1 DAY 3 25 31 10 19 28 10 1 18 11 26 28 MEAN QNH PRESSURE IN HPA 1015.4 1012.5 1015.0 1013.9 1016.5 1013.3 1013.9 1016.7 1019.0 1019.5 1019.7 1017.2 1016.1 MAX. QNH PRESSURE IN HPA 1026.8 1020.2 1022.9 1018.2 1022.4 1019.0 1018.5 1022.9 1023.3 1025.9 1030.0 1024.8 1030.0 DAY 10 16 13 8 3 7 13 31 30 30 4 3 MIN. QNH PRESSURE IN HPA 1002.9 1005.0 1000.7 1008.1 1010.7 1007.2 1009.2 1011.3 1013.5 1015.2 1006.7 1010.6 1000.7 DAY 3 25 31 10 19 28 10 1 18 11 26 28 MEAN QFF PRESSURE IN HPA 1020.6 1016.0 1018.2 1012.2 1013.0 1005.6 1004.7 1009.5 1014.1 1017.8 1019.6 1019.7 1014.2 MAX. QFF PRESSURE IN HPA 1035.6 1027.1 1032.3 1019.1 1024.2 1013.2 1011.1 1019.9 1020.6 1024.8 1030.0 1029.9 1035.6 DAY 10 16 13 20 3 7 13 31 30 18 4 29 MIN. QFF PRESSURE IN HPA 1004.1 1003.7 997.2 1003.4 1003.8 997.9 1000.0 1003.1 1006.9 1011.2 1003.5 1011.7 997.2 DAY 3 25 31 15 19 28 10 25 18 14 26 28 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.0 868.2 870.3 869.2 871.1 868.1 868.6 871.3 873.4 874.3 874.3 872.4 871.0 MAX. QFE PRESSURE IN HPA 881.2 875.7 877.1 872.6 876.0 872.5 872.9 877.1 877.8 879.3 883.4 878.0 883.4 DAY 10 16 13 8 3 7 6 31 30 30 4 1 MIN. QFE PRESSURE IN HPA 860.5 860.6 857.4 862.5 865.7 862.8 864.3 866.2 869.3 870.2 862.6 865.3 857.4 DAY 1 11 31 15 19 28 10 1 18 24 26 28 MEAN QNH PRESSURE IN HPA 1016.5 1013.3 1015.7 1014.4 1016.6 1013.2 1013.8 1016.8 1019.2 1020.2 1020.3 1018.1 1016.5 MAX. QNH PRESSURE IN HPA 1028.0 1021.8 1023.4 1018.3 1022.2 1018.2 1018.6 1023.4 1024.2 1025.9 1030.5 1024.4 1030.5 DAY 10 16 13 8 3 7 6 31 30 30 4 1 MIN. QNH PRESSURE IN HPA 1004.6 1004.7 1001.1 1006.9 1010.5 1007.2 1008.9 1011.0 1014.6 1015.6 1007.0 1010.0 1001.1 DAY 1 11 31 15 19 28 10 1 18 24 26 28 MEAN QFF PRESSURE IN HPA 1021.2 1016.4 1018.2 1012.3 1012.9 1005.0 1003.9 1008.8 1013.2 1017.2 1019.0 1020.5 1014.0 MAX. QFF PRESSURE IN HPA 1035.4 1028.3 1030.1 1019.5 1023.6 1011.4 1010.4 1019.6 1020.8 1024.6 1029.8 1030.3 1035.4 DAY 10 16 12 20 3 7 13 31 30 16 4 29 MIN. QFF PRESSURE IN HPA 1005.4 1004.7 996.6 1000.2 1002.9 997.0 998.9 1001.0 1007.5 1010.4 1004.2 1011.3 996.6 DAY 1 25 31 15 19 28 10 1 18 11 26 28 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 869.9 867.3 869.5 868.3 870.4 867.3 867.6 870.2 872.0 872.8 872.8 871.1 869.9 MAX. QFE PRESSURE IN HPA 879.3 875.4 877.2 871.5 875.8 872.5 871.4 875.3 876.4 877.8 882.1 876.3 882.1 DAY 10 16 12 8 2 7 6 31 30 29 4 1 MIN. QFE PRESSURE IN HPA 860.5 859.1 857.0 862.3 864.4 861.6 863.5 865.3 867.7 868.4 862.1 862.9 857.0 DAY 1 25 31 15 10 19 10 1 17 24 26 28 MEAN QNH PRESSURE IN HPA 1015.2 1012.3 1014.8 1013.5 1015.9 1012.3 1012.6 1015.6 1017.6 1018.6 1018.5 1016.6 1015.3 MAX. QNH PRESSURE IN HPA 1025.9 1021.5 1023.5 1017.1 1021.9 1018.2 1016.9 1021.4 1022.6 1024.2 1029.1 1022.5 1029.1 DAY 10 16 12 8 2 7 6 31 30 29 4 1 MIN. QNH PRESSURE IN HPA 1004.6 1003.0 1000.6 1006.6 1009.0 1005.8 1008.0 1010.0 1012.8 1013.5 1006.4 1007.3 1000.6 DAY 1 25 31 15 10 19 10 1 17 24 26 28 MEAN QFF PRESSURE IN HPA 1019.1 ****** 1016.3 1010.8 1011.7 1003.8 1003.4 1007.8 1011.1 1014.8 1016.4 1018.1 ****** MAX. QFF PRESSURE IN HPA 1032.2 ****** 1030.3 1017.0 1022.9 1011.8 1008.9 1016.6 1018.9 1022.6 1027.3 1026.3 ****** DAY 10 ** 12 20 2 7 13 31 30 16 4 29 MIN. QFF PRESSURE IN HPA 1004.8 ****** 997.0 1001.7 1001.5 994.5 997.9 1002.6 1004.9 1008.3 1005.4 1007.0 ****** DAY 1 ** 31 15 10 19 10 25 18 24 26 28 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 869.7 866.6 868.9 867.8 869.7 866.5 866.8 869.3 871.1 872.0 872.4 870.7 869.3 MAX. QFE PRESSURE IN HPA 878.4 874.2 876.8 872.1 875.8 871.3 870.3 875.1 875.5 877.9 881.4 875.6 881.4 DAY 9 16 12 30 2 12 7 31 30 29 4 1 MIN. QFE PRESSURE IN HPA 862.9 860.5 858.0 864.2 863.7 860.3 862.9 864.6 866.2 867.2 865.9 865.9 858.0 DAY 17 11 31 18 10 19 10 1 17 24 26 19 MEAN QNH PRESSURE IN HPA 1015.0 1011.5 1014.1 1012.8 1015.1 1011.3 1011.7 1014.6 1016.6 1017.6 1018.1 1016.2 1014.5 MAX. QNH PRESSURE IN HPA 1024.9 1020.1 1023.1 1017.7 1021.9 1016.8 1015.7 1021.1 1021.6 1024.3 1028.3 1021.7 1028.3 DAY 9 16 12 30 2 12 7 31 30 29 4 1 MIN. QNH PRESSURE IN HPA 1007.3 1004.6 1001.8 1008.8 1008.2 1004.4 1007.3 1009.2 1011.0 1012.2 1010.7 1010.7 1001.8 DAY 17 11 31 18 10 19 10 1 17 24 26 19 MEAN QFF PRESSURE IN HPA 1019.0 1013.9 1016.2 1010.3 1010.9 1003.2 1002.1 1006.6 1010.5 1014.0 1016.3 1017.8 1011.7 MAX. QFF PRESSURE IN HPA 1030.9 1025.8 1031.2 1016.6 1023.1 1010.8 1008.0 1017.2 1018.1 1021.6 1026.5 1024.4 1031.2 DAY 9 16 12 30 2 12 13 31 30 16 4 29 MIN. QFF PRESSURE IN HPA 1009.2 1002.6 998.7 1003.6 1000.8 993.6 997.4 1000.2 1003.4 1007.1 1007.7 1010.2 993.6 DAY 17 25 31 14 10 19 10 26 25 24 25 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 870.7 867.3 869.6 868.3 870.2 866.9 867.0 869.8 872.0 872.9 873.3 871.6 870.0 MAX. QFE PRESSURE IN HPA 880.0 874.7 877.5 872.5 876.5 871.3 870.8 875.9 876.4 879.0 882.2 877.5 882.2 DAY 9 16 12 30 2 6 7 31 30 29 4 2 MIN. QFE PRESSURE IN HPA 863.8 860.8 859.1 864.4 864.2 861.8 863.4 865.1 866.1 868.1 866.4 866.2 859.1 DAY 30 25 30 18 10 19 10 1 17 24 25 27 MEAN QNH PRESSURE IN HPA 1016.1 1012.3 1014.9 1013.5 1015.6 1011.9 1012.0 1015.2 1017.6 1018.6 1019.1 1017.1 1015.3 MAX. QNH PRESSURE IN HPA 1026.7 1020.7 1023.9 1018.2 1022.7 1016.8 1016.3 1022.0 1022.6 1025.6 1029.2 1023.9 1029.2 DAY 9 16 12 30 2 6 7 31 30 29 4 2 MIN. QNH PRESSURE IN HPA 1008.3 1004.9 1003.0 1009.0 1008.8 1006.1 1007.9 1009.8 1010.9 1013.2 1011.3 1011.0 1003.0 DAY 30 25 30 18 10 19 10 1 17 24 25 27 MEAN QFF PRESSURE IN HPA 1021.3 1015.9 1017.9 1011.7 1012.0 1004.1 1002.9 1008.1 1012.8 1016.9 1019.0 1019.7 1013.5 MAX. QFF PRESSURE IN HPA 1034.0 1027.7 1032.6 1017.3 1024.4 1010.7 1008.9 1019.5 1020.6 1024.1 1029.0 1027.6 1034.0 DAY 9 16 12 30 2 6 14 31 30 17 4 2 MIN. QFF PRESSURE IN HPA 1012.6 1005.1 1000.2 1004.8 1002.8 996.1 998.3 1001.3 1004.6 1010.0 1008.0 1011.4 996.1 DAY 3 25 30 22 10 19 10 1 25 13 25 19 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 871.0 867.9 870.2 869.8 871.4 868.1 868.3 871.2 873.0 873.6 874.0 871.8 870.9 MAX. QFE PRESSURE IN HPA 880.3 874.7 877.6 874.7 877.6 873.6 872.1 876.9 877.1 880.0 883.2 878.6 883.2 DAY 9 16 12 30 2 6 7 31 29 29 3 2 MIN. QFE PRESSURE IN HPA 862.8 861.0 859.7 865.7 865.7 863.2 864.9 866.7 866.3 868.7 866.0 866.3 859.7 DAY 30 25 30 9 9 26 18 18 17 24 25 30 MEAN QNH PRESSURE IN HPA 1016.5 1012.9 1015.5 1015.1 1016.9 1013.2 1013.4 1016.7 1018.8 1019.5 1019.9 1017.4 1016.3 MAX. QNH PRESSURE IN HPA 1027.0 1020.7 1024.0 1020.7 1024.0 1019.4 1017.7 1023.2 1023.4 1026.7 1030.3 1025.1 1030.3 DAY 9 16 12 30 2 6 7 31 29 29 3 2 MIN. QNH PRESSURE IN HPA 1007.2 1005.2 1003.7 1010.5 1010.5 1007.6 1009.6 1011.6 1011.2 1013.9 1010.8 1011.2 1003.7 DAY 30 25 30 9 9 26 18 18 17 24 25 30 MEAN QFF PRESSURE IN HPA 1021.2 1016.1 1018.0 1013.0 1013.1 1004.9 1003.6 1008.8 1012.8 1016.5 1018.7 1019.8 1013.9 MAX. QFF PRESSURE IN HPA 1034.4 1027.5 1030.6 1019.9 1025.5 1012.8 1009.7 1019.5 1020.3 1024.7 1029.4 1027.8 1034.4 DAY 9 16 12 30 2 6 13 31 30 16 4 2 MIN. QFF PRESSURE IN HPA 1011.5 1004.2 1000.2 1006.6 1004.4 997.6 999.2 1001.7 1003.8 1009.7 1007.0 1012.6 997.6 DAY 16 25 30 14 9 26 10 1 17 13 25 27 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 870.7 ****** 869.5 869.2 870.9 867.7 868.7 871.2 872.7 873.5 873.9 871.4 ****** MAX. QFE PRESSURE IN HPA 880.3 ****** 877.0 874.1 876.9 873.4 871.6 876.4 876.8 879.7 883.0 878.3 ****** DAY 9 ** 12 30 2 6 7 31 29 29 3 2 MIN. QFE PRESSURE IN HPA 862.7 ****** 859.1 865.1 865.2 862.8 864.7 866.5 866.8 868.7 864.9 864.8 ****** DAY 2 ** 30 9 9 27 9 18 17 24 25 27 MEAN QNH PRESSURE IN HPA 1016.2 ****** 1014.8 1014.5 1016.4 1012.8 1013.9 1016.7 1018.5 1019.3 1019.7 1017.0 ****** MAX. QNH PRESSURE IN HPA 1027.0 ****** 1023.3 1020.0 1023.2 1019.2 1017.2 1022.6 1023.1 1026.4 1030.1 1024.8 ****** DAY 9 ** 12 30 2 6 7 31 29 29 3 2 MIN. QNH PRESSURE IN HPA 1007.1 ****** 1003.0 1009.8 1009.9 1007.2 1009.3 1011.4 1011.7 1013.9 1009.6 1009.5 ****** DAY 2 ** 30 9 9 27 9 18 17 24 25 27 MEAN QFF PRESSURE IN HPA 1020.1 ****** 1016.6 1011.9 1012.1 1004.1 1004.0 1008.7 1011.9 1015.6 1017.7 1018.6 ****** MAX. QFF PRESSURE IN HPA 1034.4 ****** 1031.5 1019.7 1024.4 1012.3 1009.0 1018.1 1018.6 1024.2 1028.9 1027.1 ****** DAY 9 ** 12 19 2 6 13 31 30 16 4 2 MIN. QFF PRESSURE IN HPA 1007.6 ****** 998.6 1003.1 1003.0 996.5 999.3 1002.5 1002.8 1008.9 1005.0 1009.6 ****** DAY 2 ** 30 14 9 27 17 24 17 13 25 27 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -2.1 0.5 4.7 12.7 16.3 21.4 23.7 22.3 20.1 10.8 4.1 2.4 11.4 MINIMUN AIR TEMPERATURE (C) -6.2 -2.8 0.5 7.0 11.2 14.2 16.1 14.3 12.3 4.0 0.2 -1.8 5.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 21 9 5 0 0 0 0 0 0 0 4 5 44 DAYS WITH FREEZING MIN.<= 0 29 24 14 0 0 0 0 0 0 4 16 26 113 TEMPERATURE RECORDS LOWEST(C) -15.2 -13.0 -5.6 1.8 3.6 9.4 13.2 9.4 6.2 -3.6 -10.0 -9.6 -15.2 DAY 20 17 14 14 11 23 10 2 27 8 15 1 MAXIMUM AIR TEMPERATURE (C) 2.8 4.9 10.1 19.8 22.9 29.0 30.7 29.8 28.6 18.8 9.4 8.6 17.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 1 15 19 17 13 1 0 0 66 DAYS WITH MAXIMUM TEMP. <= 0 10 3 0 0 0 0 0 0 0 0 2 2 17 TEMPERATURE RECORDS HIGHEST(C) 12.4 12.6 19.8 29.8 30.6 36.2 36.6 33.6 33.6 31.0 19.8 16.4 36.6 DAY 27 28 30 20 27 17 3 28 13 1 11 23 DIF. BETWEEN (MAX.-MIN.) (C) 9.0 7.7 9.6 12.8 11.7 14.8 14.6 15.5 16.3 14.8 9.2 10.4 12.2 MEAN DAILY TEMP. (MDT) (C) -1.7 1.0 5.3 13.4 17.0 21.6 23.4 22.1 20.4 11.4 4.8 3.4 11.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 3.3 44.9 74.1 43.4 27.4 0.2 0.0 0.0 193.3 HEATING DEG. DAYS(BASE 18 0C) 609.9 475.5 394.3 141.4 55.2 3.0 0.0 0.0 12.9 208.5 396.3 453.1 2750.1 DEWPOINT (MEAN C) -7.9 -3.4 -1.4 3.9 8.3 9.3 8.7 8.6 6.6 -1.1 -0.1 -1.8 2.5 MIXING RATIO (G/KG) 2.55 3.55 4.12 5.98 8.17 8.72 8.41 8.38 7.32 4.34 4.48 3.88 5.82 VAPOUR PRESSURE (HPA) 3.56 4.94 5.71 8.28 11.26 11.99 11.58 11.55 10.12 6.06 6.24 5.42 8.06 SATURATION DEF. (HPA) 1.97 1.65 3.42 7.37 8.20 15.07 18.72 16.46 14.94 7.80 2.45 2.23 8.36 RELATIVE HUMIDITY (MEAN %) 67 77 69 61 63 52 42 45 46 48 77 76 60 RELATIVE HUMIDITY (MAX. %) 81 90 87 81 84 76 66 63 68 67 91 89 79 RELATIVE HUMIDITY (MIN. %) 50 61 48 38 40 30 24 29 26 28 59 55 41 RELATIVE HUMIDITY (MEAN% 03UTC) 76 84 84 76 75 68 62 60 64 64 88 86 74 RELATIVE HUMIDITY (MEAN% 09UTC) 56 67 55 45 46 35 27 32 30 33 63 62 46 RELATIVE HUMIDITY (MEAN% 15UTC) 67 77 63 55 57 41 30 35 37 44 76 76 55 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 14.1 74.0 55.2 52.2 56.5 13.9 0.2 0.3 2.0 5.5 40.0 12.6 326.5 DAYS WITH PRECIPITATION >=10 0 3 2 1 1 0 0 0 0 0 2 0 9 DAYS WITH PRECIPITATION >= 5 0 4 5 4 2 0 0 0 0 0 3 1 19 DAYS WITH PRECIPITATION >= 1 6 9 9 10 7 4 0 0 2 2 7 2 58 DAYS WITH PRECIPITATION 11 13 13 13 14 4 1 1 2 4 14 8 98 GREATEST DAILY PRECIPITATION 4.0 23.6 12.1 16.0 36.8 4.4 0.2 0.3 1.0 2.7 12.0 9.0 36.8 DAY 31 5 9 13 8 1 8 23 8 30 29 6 DAY WITH THUNDER STORM 0 0 0 4 6 4 0 1 0 0 0 0 15 DAYS WITH SNOW OR SLEET 10 12 7 0 0 0 0 0 0 0 7 6 42 DAYS WITH DUST 0 0 0 0 0 0 1 0 1 1 0 0 3 WIND DIRECTION (PREVAILING) 135 135 315 135 135 315 45 90 135 135 135 270 135 PREVAILING WIND SPEED(KNOTS) 8.4 6.6 7.0 6.5 6.3 7.3 8.6 6.4 7.2 5.5 7.3 5.1 6.6 PREVAILING WIND PERCENT 10.9 16.1 24.2 28.3 19.8 14.6 22.2 21.8 16.7 19.4 20.0 8.5 15.2 CALMS PERCENT OF WIND 66.5 49.6 36.7 37.9 39.1 41.3 36.7 38.7 38.8 46.4 43.3 70.6 45.5 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 173 152 281 153 119 67 42 59 114 142 177 153 105 VECTOR WIND MAGNITUDE(KNOTS) 0.4 0.7 0.8 1.6 1.3 1.1 2.5 1.9 0.9 0.9 1.0 0.3 0.6 WIND STEADINESES (MEAN %) 18.2 20.0 20.0 41.0 36.1 26.8 54.3 47.5 23.1 29.0 27.0 18.8 17.1 WIND SPEED (MEAN KNOTS) 2.2 3.5 4.0 3.9 3.6 4.1 4.6 4.0 3.9 3.1 3.7 1.6 3.5 FASTEST WIND DIRECTION 130 150 310 150 290 290 30 90 320 260 130 300 30 FASTEST WIND SPEED (KNOTS) 17 16 14 14 17 16 29 14 16 14 17 12 29 DAY 8 1 23 21 7 21 28 1 15 1 12 6 DAYS WITH SKY CLEAR (0-2)/8 15 8 11 4 4 21 27 27 29 23 4 11 184 DAYS WITH P.CLOUDY (3-6)/8 8 9 8 18 20 7 4 3 1 7 16 11 112 DAYS WITH CLOUDY (7-8)/8 8 11 12 8 7 2 0 1 0 1 10 9 69 DAYS WITH VISIBILITY =< 2 KM 1 7 3 3 2 1 1 0 0 0 7 7 32 DURATION OF SUNSHINE HOURS 143.6 122.6 181.2 188.5 216.0 322.1 295.8 ****** 214.5 253.6 123.2 129.3 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.6 871.3 870.2 869.2 869.7 868.4 868.6 870.2 871.1 876.6 873.4 874.1 871.2 MAX. QFE PRESSURE IN HPA 882.9 880.5 878.3 877.6 877.5 878.0 873.5 875.0 879.1 883.0 880.7 879.9 883.0 DAY-HOUR 6- 6 9- 6 17- 6 1- 3 9-18 22-18 27- 3 28-18 23- 6 20- 6 21-18 27- 6 MIN. QFE PRESSURE IN HPA 859.7 863.9 857.9 860.7 864.8 863.0 864.0 864.2 864.6 867.4 861.3 865.8 857.9 DAY-HOUR 9-12 15- 9 22- 0 21- 0 23-12 4-12 24-15 12-12 13-12 1-12 14- 9 5- 0 MEAN QNH PRESSURE IN HPA 1017.2 1016.9 1015.5 1014.4 1015.0 1013.6 1013.8 1015.5 1016.6 1022.8 1019.2 1020.0 1016.7 MAX. QNH PRESSURE IN HPA 1030.0 1027.3 1024.8 1024.0 1023.9 1024.4 1019.3 1021.0 1025.7 1030.1 1027.5 1026.6 1030.1 DAY-HOUR 6- 6 9- 6 17- 6 1- 3 9-18 22-18 27- 3 28-18 23- 6 20- 6 21-18 27- 6 MIN. QNH PRESSURE IN HPA 1003.7 1008.4 1001.6 1004.8 1009.5 1007.4 1008.6 1008.8 1009.2 1012.4 1005.5 1010.6 1001.6 DAY-HOUR 9-12 15- 9 22- 0 21- 0 23-12 4-12 24-15 12-12 13-12 1-12 14- 9 5- 0 MEAN QFF PRESSURE IN HPA 1022.3 1020.3 1016.5 1010.8 1009.4 1005.2 1004.3 1006.8 1009.1 1020.5 1020.5 1022.4 1014.0 MAX. QFF PRESSURE IN HPA 1035.5 1032.7 1028.8 1023.4 1023.3 1020.7 1010.2 1012.7 1020.4 1029.4 1032.8 1031.9 1035.5 DAY-HOUR 6- 6 9- 6 16- 6 1- 3 9-18 22-18 29- 3 24- 3 23- 3 8- 3 30-15 6-18 MIN. QFF PRESSURE IN HPA 1006.2 1009.4 1000.0 995.8 1000.7 996.7 999.1 998.9 1000.1 1004.2 1004.4 1012.7 995.8 DAY-HOUR 9-12 21-12 22- 0 21- 0 23-12 19- 0 24-15 12-12 13-12 1-12 10-21 5-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 871.3 870.7 869.4 868.9 869.6 868.3 868.6 870.0 871.2 876.5 873.1 874.0 871.0 MAX. QFE PRESSURE IN HPA 880.7 878.4 876.8 877.2 875.9 876.4 872.9 874.0 877.9 881.5 879.7 879.1 881.5 DAY 6 10 17 1 10 23 28 29 23 17 22 27 MIN. QFE PRESSURE IN HPA 860.8 865.9 857.9 860.7 865.2 863.7 865.7 865.2 865.6 869.1 862.9 865.8 857.9 DAY 9 7 22 21 7 4 25 13 14 29 14 5 MEAN QNH PRESSURE IN HPA 1016.9 1016.2 1014.7 1014.1 1014.8 1013.4 1013.8 1015.3 1016.7 1022.7 1018.9 1019.8 1016.4 MAX. QNH PRESSURE IN HPA 1027.5 1024.9 1023.1 1023.5 1022.0 1022.6 1018.6 1019.9 1024.3 1028.4 1026.4 1025.7 1028.4 DAY 6 10 17 1 10 23 28 29 23 17 22 27 MIN. QNH PRESSURE IN HPA 1004.9 1010.7 1001.6 1004.8 1009.9 1008.2 1010.5 1009.9 1010.4 1014.3 1007.3 1010.6 1001.6 DAY 9 7 22 21 7 4 25 13 14 29 14 5 MEAN QFF PRESSURE IN HPA 1021.6 1019.3 1015.3 1010.2 1009.1 1005.1 1004.4 1006.7 1008.9 1019.9 1019.7 1021.6 1013.5 MAX. QFF PRESSURE IN HPA 1033.0 1029.2 1026.1 1021.0 1021.6 1018.7 1009.1 1011.2 1017.3 1027.0 1029.4 1030.0 1033.0 DAY 7 17 17 1 10 23 28 24 16 8 22 7 MIN. QFF PRESSURE IN HPA 1010.4 1010.8 1000.0 995.8 1003.4 996.7 1000.7 1000.7 1000.6 1008.3 1006.3 1013.6 995.8 DAY 9 3 22 21 7 19 25 13 14 1 11 5 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 871.6 871.3 870.1 869.7 869.9 869.0 869.4 871.0 872.0 877.0 873.6 874.2 871.6 MAX. QFE PRESSURE IN HPA 881.6 878.8 877.3 877.6 876.4 876.6 873.5 874.5 879.0 881.8 879.9 879.4 881.8 DAY 6 9 31 1 9 23 27 29 23 17 22 27 MIN. QFE PRESSURE IN HPA 860.3 865.4 858.9 864.0 865.5 864.4 866.4 866.0 866.6 870.5 862.6 866.8 858.9 DAY 9 15 22 14 7 4 12 13 14 1 14 5 MEAN QNH PRESSURE IN HPA 1017.2 1016.8 1015.5 1015.0 1015.3 1014.2 1014.7 1016.5 1017.6 1023.3 1019.4 1020.2 1017.1 MAX. QNH PRESSURE IN HPA 1028.5 1025.3 1023.6 1024.0 1022.6 1022.8 1019.3 1020.5 1025.6 1028.7 1026.6 1026.0 1028.7 DAY 6 9 31 1 9 23 27 29 23 17 22 27 MIN. QNH PRESSURE IN HPA 1004.4 1010.1 1002.8 1008.6 1010.3 1009.0 1011.3 1010.8 1011.5 1015.9 1007.0 1011.7 1002.8 DAY 9 15 22 14 7 4 12 13 14 1 14 5 MEAN QFF PRESSURE IN HPA 1023.1 1020.8 1017.1 1012.2 1010.1 1006.3 1005.5 1008.5 1011.1 1022.2 1021.2 1023.4 1015.1 MAX. QFF PRESSURE IN HPA 1033.9 1030.4 1027.8 1023.4 1022.3 1018.6 1010.2 1012.7 1020.4 1029.4 1030.9 1029.6 1033.9 DAY 6 9 16 1 10 23 29 24 23 8 22 7 MIN. QFF PRESSURE IN HPA 1009.0 1010.9 1002.3 1003.0 1004.0 1000.3 1001.6 1002.0 1003.3 1010.1 1006.8 1015.2 1000.3 DAY 9 3 22 12 7 18 25 13 14 1 14 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 872.6 872.2 871.0 870.2 870.2 869.0 869.3 871.1 872.2 877.7 874.3 875.2 872.1 MAX. QFE PRESSURE IN HPA 882.9 880.5 878.3 877.2 877.0 876.8 873.5 874.0 879.1 883.0 880.6 879.9 883.0 DAY 6 9 17 1 9 22 27 31 23 20 21 27 MIN. QFE PRESSURE IN HPA 861.2 864.9 859.3 865.2 865.8 865.2 866.8 866.4 867.1 870.2 862.3 867.7 859.3 DAY 9 15 22 13 14 3 12 12 14 1 14 5 MEAN QNH PRESSURE IN HPA 1018.3 1017.9 1016.4 1015.6 1015.6 1014.2 1014.6 1016.6 1017.9 1024.1 1020.3 1021.2 1017.7 MAX. QNH PRESSURE IN HPA 1030.0 1027.3 1024.8 1023.5 1023.3 1023.1 1019.3 1019.9 1025.7 1030.1 1027.4 1026.6 1030.1 DAY 6 9 17 1 9 22 27 31 23 20 21 27 MIN. QNH PRESSURE IN HPA 1005.4 1009.6 1003.2 1009.9 1010.6 1009.9 1011.7 1011.3 1012.1 1015.6 1006.6 1012.8 1003.2 DAY 9 15 22 13 14 3 12 12 14 1 14 5 MEAN QFF PRESSURE IN HPA 1023.6 1021.6 1017.6 1012.2 1010.0 1005.8 1005.0 1007.7 1010.3 1021.8 1021.7 1024.1 1015.1 MAX. QFF PRESSURE IN HPA 1035.5 1032.7 1028.8 1021.7 1022.8 1018.2 1009.5 1011.8 1020.3 1028.6 1031.1 1029.3 1035.5 DAY 6 9 16 1 10 22 27 24 23 8 30 7 MIN. QFF PRESSURE IN HPA 1008.0 1010.4 1003.7 1005.0 1003.7 999.5 1001.0 1001.3 1002.0 1008.0 1005.7 1016.3 999.5 DAY 9 3 22 22 14 19 1 12 14 1 14 5 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 871.3 871.4 870.2 869.1 869.6 868.2 868.3 870.0 870.8 876.2 873.0 873.7 871.0 MAX. QFE PRESSURE IN HPA 881.9 879.8 877.2 875.8 876.6 877.2 872.3 872.4 877.2 881.2 879.1 878.0 881.9 DAY 6 9 16 1 9 22 27 31 23 20 21 20 MIN. QFE PRESSURE IN HPA 860.3 863.9 859.6 863.0 865.0 864.1 865.1 865.3 866.1 868.3 861.3 866.2 859.6 DAY 9 15 22 13 14 3 13 12 14 1 14 5 MEAN QNH PRESSURE IN HPA 1016.8 1016.9 1015.6 1014.3 1014.9 1013.3 1013.4 1015.3 1016.2 1022.3 1018.7 1019.6 1016.5 MAX. QNH PRESSURE IN HPA 1028.8 1026.5 1023.5 1021.9 1022.8 1023.5 1018.0 1018.1 1023.5 1028.0 1025.7 1024.4 1028.8 DAY 6 9 16 1 9 22 27 31 23 20 21 20 MIN. QNH PRESSURE IN HPA 1004.4 1008.4 1003.6 1007.4 1009.7 1008.7 1009.8 1010.0 1010.9 1013.4 1005.5 1011.0 1003.6 DAY 9 15 22 13 14 3 13 12 14 1 14 5 MEAN QFF PRESSURE IN HPA 1021.4 1020.0 1016.3 1010.3 1009.0 1004.7 1003.7 1006.2 1008.1 1019.3 1019.6 1021.5 1013.3 MAX. QFF PRESSURE IN HPA 1034.1 1031.2 1027.7 1019.6 1022.1 1019.1 1008.7 1010.4 1016.8 1026.1 1031.5 1027.9 1034.1 DAY 6 9 14 24 9 22 27 25 23 8 30 6 MIN. QFF PRESSURE IN HPA 1006.4 1009.9 1004.0 1003.0 1000.9 998.2 999.7 999.9 1000.5 1005.3 1006.2 1013.2 998.2 DAY 9 3 22 20 23 19 13 12 14 1 10 5 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 870.9 870.7 869.4 868.0 868.8 867.4 867.6 869.0 869.7 875.3 872.8 873.3 870.2 MAX. QFE PRESSURE IN HPA 881.4 879.3 876.2 873.9 876.6 876.4 871.2 871.5 875.8 880.1 878.9 878.4 881.4 DAY 6 9 17 1 9 22 27 31 23 17 21 6 MIN. QFE PRESSURE IN HPA 859.7 863.9 860.5 862.0 864.8 863.0 864.3 864.2 864.6 867.4 863.8 866.4 859.7 DAY 9 21 12 13 23 4 24 12 13 1 10 5 MEAN QNH PRESSURE IN HPA 1016.4 1016.1 1014.6 1013.1 1014.0 1012.4 1012.6 1014.2 1015.0 1021.3 1018.5 1019.1 1015.6 MAX. QNH PRESSURE IN HPA 1028.3 1025.9 1022.4 1019.8 1022.8 1022.6 1016.7 1017.1 1021.9 1026.8 1025.4 1024.9 1028.3 DAY 6 9 17 1 9 22 27 31 23 17 21 6 MIN. QNH PRESSURE IN HPA 1003.7 1008.4 1004.6 1006.3 1009.5 1007.4 1008.9 1008.8 1009.2 1012.4 1008.3 1011.3 1003.7 DAY 9 21 12 13 23 4 24 12 13 1 10 5 MEAN QFF PRESSURE IN HPA 1021.0 1019.1 1015.2 1009.1 1008.2 1004.0 1003.3 1005.5 1007.2 1018.6 1019.5 1020.7 1012.6 MAX. QFF PRESSURE IN HPA 1033.5 1030.7 1026.0 1018.6 1021.9 1018.0 1008.0 1009.9 1015.4 1025.0 1031.5 1029.2 1033.5 DAY 6 9 16 24 9 22 28 24 23 8 30 6 MIN. QFF PRESSURE IN HPA 1006.2 1009.4 1003.4 1000.9 1000.7 998.1 999.5 998.9 1000.1 1004.2 1005.1 1012.7 998.1 DAY 9 21 21 20 23 17 24 12 13 1 10 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.7 871.3 870.1 868.5 869.3 867.8 867.9 869.4 870.3 876.3 873.5 874.1 870.9 MAX. QFE PRESSURE IN HPA 881.6 880.0 877.0 873.9 877.1 877.1 872.0 872.9 876.3 881.0 880.1 879.5 881.6 DAY 6 9 16 24 9 22 27 28 23 16 21 6 MIN. QFE PRESSURE IN HPA 860.0 864.2 860.6 863.0 865.9 864.3 864.0 864.5 865.1 867.9 864.5 867.2 860.0 DAY 8 21 21 20 23 3 24 12 13 1 10 4 MEAN QNH PRESSURE IN HPA 1017.3 1016.9 1015.5 1013.7 1014.6 1012.9 1012.9 1014.6 1015.7 1022.5 1019.3 1020.0 1016.3 MAX. QNH PRESSURE IN HPA 1028.5 1026.7 1023.3 1019.8 1023.4 1023.4 1017.6 1018.6 1022.5 1027.8 1026.8 1026.1 1028.5 DAY 6 9 16 24 9 22 27 28 23 16 21 6 MIN. QNH PRESSURE IN HPA 1004.0 1008.8 1004.7 1007.4 1010.7 1008.9 1008.6 1009.1 1009.8 1013.0 1009.1 1012.2 1004.0 DAY 8 21 21 20 23 3 24 12 13 1 10 4 MEAN QFF PRESSURE IN HPA 1023.0 1020.8 1017.0 1010.8 1009.3 1005.0 1004.0 1006.6 1009.2 1021.4 1021.2 1023.1 1014.3 MAX. QFF PRESSURE IN HPA 1034.4 1032.6 1028.1 1019.9 1023.0 1019.1 1009.7 1010.8 1017.3 1027.9 1032.8 1030.8 1034.4 DAY 6 9 16 24 9 22 28 24 23 7 30 6 MIN. QFF PRESSURE IN HPA 1008.0 1010.1 1003.5 1001.0 1002.8 998.5 999.1 999.9 1001.9 1006.4 1006.4 1015.8 998.5 DAY 9 21 9 20 23 18 24 12 3 1 10 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 872.0 871.8 870.8 869.7 870.4 869.1 869.1 870.6 871.6 877.1 873.8 874.5 871.7 MAX. QFE PRESSURE IN HPA 881.4 880.5 877.6 875.6 877.5 878.0 873.5 875.0 877.3 882.0 880.7 879.4 882.0 DAY 6 9 31 24 9 22 27 28 22 16 21 6 MIN. QFE PRESSURE IN HPA 860.0 865.2 860.4 863.3 866.7 865.1 865.4 865.3 866.4 868.4 864.0 866.7 860.0 DAY 8 21 21 20 6 3 24 12 13 28 10 4 MEAN QNH PRESSURE IN HPA 1017.7 1017.4 1016.2 1015.0 1015.8 1014.4 1014.3 1016.1 1017.2 1023.3 1019.7 1020.4 1017.3 MAX. QNH PRESSURE IN HPA 1028.3 1027.3 1024.0 1021.7 1023.9 1024.4 1019.3 1021.0 1023.6 1029.0 1027.5 1026.0 1029.0 DAY 6 9 31 24 9 22 27 28 22 16 21 6 MIN. QNH PRESSURE IN HPA 1004.0 1009.9 1004.5 1007.8 1011.6 1009.8 1010.1 1010.0 1011.3 1013.5 1008.6 1011.6 1004.0 DAY 8 21 21 20 6 3 24 12 13 28 10 4 MEAN QFF PRESSURE IN HPA 1022.9 1021.0 1017.4 1011.5 1010.2 1005.9 1004.8 1007.2 1009.7 1021.1 1021.3 1023.3 1014.7 MAX. QFF PRESSURE IN HPA 1034.3 1032.6 1028.7 1021.8 1023.3 1020.7 1010.0 1011.4 1018.1 1027.8 1032.4 1031.9 1034.3 DAY 6 9 16 24 9 22 28 24 23 7 30 6 MIN. QFF PRESSURE IN HPA 1009.4 1010.8 1003.3 999.8 1004.8 998.5 1000.1 1000.1 1001.7 1006.4 1004.8 1015.0 998.5 DAY 8 21 8 20 23 18 24 12 13 1 10 4 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 871.7 871.3 870.4 869.3 870.0 868.7 868.8 870.3 871.4 876.8 873.5 874.0 871.3 MAX. QFE PRESSURE IN HPA 880.2 879.2 877.3 874.6 876.2 877.2 873.5 874.2 877.0 882.0 879.9 878.9 882.0 DAY 5 9 16 24 9 22 27 28 22 16 21 26 MIN. QFE PRESSURE IN HPA 860.0 865.9 859.8 862.1 866.3 864.8 865.1 865.4 866.2 867.8 864.4 866.0 859.8 DAY 8 6 21 20 6 3 24 12 13 28 10 4 MEAN QNH PRESSURE IN HPA 1017.3 1016.8 1015.8 1014.6 1015.3 1013.9 1014.0 1015.7 1016.9 1023.1 1019.3 1019.9 1016.9 MAX. QNH PRESSURE IN HPA 1026.9 1025.8 1023.6 1020.6 1022.4 1023.5 1019.3 1020.1 1023.3 1029.0 1026.6 1025.4 1029.0 DAY 5 9 16 24 9 22 27 28 22 16 21 26 MIN. QNH PRESSURE IN HPA 1004.0 1010.7 1003.8 1006.4 1011.2 1009.5 1009.8 1010.1 1011.0 1012.9 1009.0 1010.8 1003.8 DAY 8 6 21 20 6 3 24 12 13 28 10 4 MEAN QFF PRESSURE IN HPA 1021.9 1019.9 1016.4 1010.5 1009.3 1005.2 1004.3 1006.6 1008.8 1020.1 1020.4 1021.8 1013.8 MAX. QFF PRESSURE IN HPA 1034.1 1029.7 1027.4 1020.1 1022.1 1020.1 1009.8 1010.9 1016.5 1026.6 1029.5 1031.0 1034.1 DAY 19 9 16 23 9 22 27 24 15 7 30 6 MIN. QFF PRESSURE IN HPA 1009.1 1011.7 1001.3 997.5 1004.5 997.9 999.8 1000.0 1000.9 1006.1 1004.4 1014.3 997.5 DAY 8 21 8 20 6 18 24 12 13 28 10 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.9 0.9 8.2 12.1 18.2 21.8 24.2 26.4 18.3 13.0 11.0 2.4 13.1 MINIMUN AIR TEMPERATURE (C) -2.8 -4.3 2.2 5.8 10.8 14.2 16.4 16.1 7.6 5.8 4.6 -3.1 6.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 1 0 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 10 13 0 1 0 0 0 0 0 0 0 15 39 DAYS WITH FREEZING MIN.<= 0 26 27 6 5 0 0 0 0 0 0 0 23 87 TEMPERATURE RECORDS LOWEST(C) -8.6 -11.6 -2.6 -4.6 4.4 9.4 13.4 12.8 4.0 0.4 0.2 -10.6 -11.6 DAY 22 11 2 5 19 7 3 18 17 27 12 8 MAXIMUM AIR TEMPERATURE (C) 6.6 5.4 13.3 19.2 25.4 29.6 31.8 32.3 24.1 18.1 16.0 6.9 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 3 13 25 28 0 0 0 0 71 DAYS WITH MAXIMUM TEMP. <= 0 0 5 0 0 0 0 0 0 0 0 0 4 9 TEMPERATURE RECORDS HIGHEST(C) 16.0 15.2 23.0 31.0 31.6 35.4 35.0 37.0 28.4 25.0 22.4 17.6 37.0 DAY 5 27 22 26 28 16 31 1 12 19 5 20 DIF. BETWEEN (MAX.-MIN.) (C) 9.4 9.7 11.1 13.4 14.6 15.4 15.4 16.2 16.5 12.3 11.4 10.0 13.0 MEAN DAILY TEMP. (MDT) (C) 1.9 0.6 7.8 12.5 18.1 21.9 24.1 24.2 15.9 12.0 10.3 1.9 12.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.1 5.2 41.7 97.7 100.0 0.0 0.0 0.0 0.0 246.7 HEATING DEG. DAYS(BASE 18 0C) 499.7 488.1 317.2 179.6 32.4 0.4 0.0 0.0 70.1 187.3 231.9 498.3 2505.0 DEWPOINT (MEAN C) -3.1 -4.1 1.8 2.5 4.8 8.8 8.6 8.2 -1.3 3.7 3.7 -4.2 2.4 MIXING RATIO (G/KG) 3.61 3.33 5.11 5.53 6.40 8.44 8.31 8.27 4.18 5.92 5.91 3.47 5.71 VAPOUR PRESSURE (HPA) 5.02 4.62 7.09 7.66 8.86 11.59 11.42 11.37 5.83 8.25 8.20 4.82 7.89 SATURATION DEF. (HPA) 1.78 2.29 4.35 7.80 13.19 15.70 20.12 24.36 16.28 7.51 5.47 2.96 10.15 RELATIVE HUMIDITY (MEAN %) 77 73 69 57 47 48 41 36 30 58 66 65 56 RELATIVE HUMIDITY (MAX. %) 90 89 88 81 72 74 64 61 51 82 87 84 77 RELATIVE HUMIDITY (MIN. %) 59 56 50 33 26 27 23 21 18 41 48 48 38 RELATIVE HUMIDITY (MEAN% 03UTC) 86 87 87 77 62 64 59 61 51 82 85 83 74 RELATIVE HUMIDITY (MEAN% 09UTC) 67 62 56 40 29 30 26 24 21 46 54 54 42 RELATIVE HUMIDITY (MEAN% 15UTC) 77 72 65 48 38 36 31 29 26 60 67 66 51 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 41.8 26.4 48.3 37.8 9.7 2.3 0.6 0.0 0.0 51.8 20.8 25.0 264.5 DAYS WITH PRECIPITATION >=10 0 0 2 2 0 0 0 0 0 3 1 1 9 DAYS WITH PRECIPITATION >= 5 5 3 3 4 1 0 0 0 0 4 1 1 22 DAYS WITH PRECIPITATION >= 1 8 8 9 5 2 1 0 0 0 5 4 6 48 DAYS WITH PRECIPITATION 13 14 14 10 8 3 1 0 0 6 13 10 92 GREATEST DAILY PRECIPITATION 8.6 7.0 17.8 12.0 6.0 1.0 0.6 0.0 0.0 19.6 13.1 13.0 19.6 DAY 6 9 13 18 6 15 13 ** ** 23 18 1 DAY WITH THUNDER STORM 0 0 1 3 4 4 0 0 0 0 0 0 12 DAYS WITH SNOW OR SLEET 10 10 2 2 0 0 0 0 0 0 0 3 27 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 270 135 135 270 45 45 45 45 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 6.4 6.1 8.4 8.2 7.5 8.1 7.8 8.5 7.4 6.7 7.0 5.8 7.1 PREVAILING WIND PERCENT 16.7 22.1 21.0 21.3 14.5 21.3 23.0 28.4 25.3 14.2 16.7 13.5 11.6 CALMS PERCENT OF WIND 59.7 38.3 36.5 34.2 38.7 40.0 40.7 21.9 46.0 59.4 53.3 58.7 43.4 NO. OF WIND OBSERVATION 216 149 181 240 248 240 248 155 150 155 150 155 2287 VECTOR WIND DIRECTION (MEAN) 278 274 157 141 46 40 60 73 58 149 182 208 80 VECTOR WIND MAGNITUDE(KNOTS) 0.9 1.3 1.2 1.0 0.6 1.7 2.2 3.4 2.3 0.7 0.7 0.8 0.6 WIND STEADINESES (MEAN %) 37.5 36.1 25.0 21.7 14.3 39.5 53.7 61.8 65.7 29.2 24.1 33.3 16.2 WIND SPEED (MEAN KNOTS) 2.4 3.6 4.8 4.6 4.2 4.3 4.1 5.5 3.5 2.4 2.9 2.4 3.7 FASTEST WIND DIRECTION 300 270 150 240 270 60 80 90 60 60 130 150 240 FASTEST WIND SPEED (KNOTS) 16 12 17 23 16 16 14 16 14 12 14 14 23 DAY 18 27 23 26 6 22 2 22 6 11 7 2 DAYS WITH SKY CLEAR (0-2)/8 10 7 9 8 17 23 31 31 27 17 10 14 204 DAYS WITH P.CLOUDY (3-6)/8 13 9 9 15 12 7 0 0 3 9 12 14 103 DAYS WITH CLOUDY (7-8)/8 8 12 13 7 2 0 0 0 0 5 8 3 58 DAYS WITH VISIBILITY =< 2 KM 10 6 4 2 0 0 0 0 0 1 3 4 30 DURATION OF SUNSHINE HOURS 137.4 127.2 157.8 231.6 297.6 329.1 360.8 352.4 306.4 206.9 164.1 179.5 2850.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.2 869.1 870.1 871.1 869.8 866.7 866.2 867.6 874.3 875.4 871.3 872.3 870.4 MAX. QFE PRESSURE IN HPA 881.8 880.5 876.5 882.2 876.2 871.3 870.0 872.3 881.1 881.0 879.1 880.5 882.2 DAY-HOUR 9-18 18- 6 1- 3 5- 6 18-18 8-18 2- 3 15- 3 23- 3 23- 6 2- 6 22- 6 MIN. QFE PRESSURE IN HPA 859.3 856.9 860.5 860.0 860.2 860.9 862.0 861.4 868.7 867.6 857.8 856.1 856.1 DAY-HOUR 16-21 1-12 12-12 2-12 1-12 22-12 20-12 1-12 1-12 14-12 26- 6 4- 3 MEAN QNH PRESSURE IN HPA 1016.7 1014.3 1015.5 1016.6 1015.2 1011.7 1011.0 1012.7 1020.2 1021.4 1016.9 1017.9 1015.8 MAX. QNH PRESSURE IN HPA 1028.7 1027.3 1022.7 1029.2 1022.4 1016.8 1015.4 1018.0 1027.9 1027.8 1025.7 1027.3 1029.2 DAY-HOUR 9-18 18- 6 1- 3 5- 6 18-18 8-18 2- 3 15- 3 23- 3 23- 6 2- 6 22- 6 MIN. QNH PRESSURE IN HPA 1003.2 1000.5 1004.6 1004.0 1004.2 1005.0 1006.3 1005.6 1013.9 1012.6 1001.5 999.6 999.6 DAY-HOUR 16-21 1-12 12-12 2-12 1-12 22-12 20-12 1-12 1-12 14-12 26- 6 4- 3 MEAN QFF PRESSURE IN HPA 1020.6 ****** ****** 1013.4 1008.7 1003.1 1001.3 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1034.4 ****** ****** 1033.9 1020.2 1009.6 1007.8 ****** ****** ****** ****** ****** ****** DAY-HOUR 10- 6 **-** **-** 5- 6 18-18 9- 3 2- 3 **-** **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA 1005.8 ****** ****** 998.7 997.6 994.8 994.9 ****** ****** ****** ****** ****** ****** DAY-HOUR 16-21 **-** **-** 2- 9 1-12 22-12 7-12 **-** **-** **-** **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 871.2 ****** ****** 871.0 869.6 867.0 866.6 ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 880.8 ****** ****** 878.6 875.1 870.4 869.5 ****** ****** ****** ****** ****** ****** DAY 10 ** ** 5 19 9 14 ** ** ** ** ** MIN. QFE PRESSURE IN HPA 859.6 ****** ****** 863.3 862.1 863.2 863.1 ****** ****** ****** ****** ****** ****** DAY 17 ** ** 2 2 16 21 ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1016.7 ****** ****** 1016.5 1014.9 1012.0 1011.5 ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1027.6 ****** ****** 1025.1 1021.1 1015.8 1014.8 ****** ****** ****** ****** ****** ****** DAY 10 ** ** 5 19 9 14 ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1003.6 ****** ****** 1007.8 1006.4 1007.6 1007.5 ****** ****** ****** ****** ****** ****** DAY 17 ** ** 2 2 16 21 ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1020.3 ****** ****** 1013.2 1008.5 1003.4 1001.8 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1032.9 ****** ****** 1028.7 1018.6 1008.7 1006.4 ****** ****** ****** ****** ****** ****** DAY 10 ** ** 5 19 9 14 ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1005.9 ****** ****** 1003.6 999.6 996.5 997.5 ****** ****** ****** ****** ****** ****** DAY 17 ** ** 24 2 17 21 ** ** ** ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 871.1 869.3 870.4 871.6 870.2 867.7 867.3 868.8 875.0 875.8 871.6 872.4 870.9 MAX. QFE PRESSURE IN HPA 880.6 879.4 876.5 880.5 875.5 871.1 870.0 872.3 881.1 880.1 877.3 879.4 881.1 DAY 10 18 1 5 20 9 2 15 23 23 3 22 MIN. QFE PRESSURE IN HPA 861.7 860.9 863.5 862.9 863.0 864.1 864.2 863.3 870.8 870.0 858.8 856.1 856.1 DAY 17 12 15 2 2 16 20 2 1 15 26 4 MEAN QNH PRESSURE IN HPA 1016.6 1014.6 1015.9 1017.2 1015.6 1012.7 1012.2 1014.0 1021.1 1022.0 1017.1 1018.0 1016.4 MAX. QNH PRESSURE IN HPA 1027.4 1026.0 1022.7 1027.3 1021.6 1016.6 1015.4 1018.0 1027.9 1026.8 1023.6 1026.0 1027.9 DAY 10 18 1 5 20 9 2 15 23 23 3 22 MIN. QNH PRESSURE IN HPA 1005.9 1005.0 1008.0 1007.3 1007.4 1008.7 1008.8 1007.8 1016.3 1015.4 1002.7 999.6 999.6 DAY 17 12 15 2 2 16 20 2 1 15 26 4 MEAN QFF PRESSURE IN HPA 1020.4 1018.8 1016.0 1014.8 1009.7 1004.6 1003.1 1005.0 1017.1 1020.2 1016.1 1021.9 1014.0 MAX. QFF PRESSURE IN HPA 1033.7 1031.4 1025.0 1032.3 1019.0 1009.6 1007.8 1009.1 1024.2 1025.2 1022.5 1034.8 1034.8 DAY 10 18 1 5 19 9 2 8 23 24 3 8 MIN. QFF PRESSURE IN HPA 1008.7 1006.6 1006.9 1004.2 1001.8 998.6 998.7 996.9 1009.7 1013.1 1002.0 997.0 996.9 DAY 17 9 15 26 6 16 20 2 1 15 26 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 872.1 870.3 871.0 872.0 870.4 867.4 866.9 868.7 875.3 876.4 872.3 873.2 871.3 MAX. QFE PRESSURE IN HPA 881.7 880.5 876.5 882.2 875.3 871.0 869.7 872.2 881.1 881.0 879.1 880.5 882.2 DAY 10 18 1 5 20 8 13 15 23 23 2 22 MIN. QFE PRESSURE IN HPA 864.2 861.0 863.0 862.2 863.2 863.6 863.7 863.5 870.8 870.5 857.8 857.0 857.0 DAY 17 12 15 2 1 22 20 2 1 14 26 4 MEAN QNH PRESSURE IN HPA 1017.8 1015.7 1016.5 1017.6 1015.8 1012.4 1011.8 1013.9 1021.4 1022.6 1018.0 1019.0 1016.9 MAX. QNH PRESSURE IN HPA 1028.6 1027.3 1022.7 1029.2 1021.4 1016.5 1015.0 1017.9 1027.9 1027.8 1025.7 1027.3 1029.2 DAY 10 18 1 5 20 8 13 15 23 23 2 22 MIN. QNH PRESSURE IN HPA 1008.8 1005.2 1007.4 1006.5 1007.6 1008.1 1008.2 1008.0 1016.3 1015.9 1001.5 1000.6 1000.6 DAY 17 12 15 2 1 22 20 2 1 14 26 4 MEAN QFF PRESSURE IN HPA 1022.2 ****** ****** 1014.5 1009.3 1003.8 1002.0 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1034.4 ****** ****** 1033.9 1017.9 1009.3 1006.3 ****** ****** ****** ****** ****** ****** DAY 10 ** ** 5 19 8 10 ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1010.7 ****** ****** 1001.6 1001.2 998.4 997.2 ****** ****** ****** ****** ****** ****** DAY 17 ** ** 2 6 16 20 ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 871.0 869.2 870.0 870.9 869.5 866.2 865.7 867.4 874.0 875.0 870.9 871.9 870.1 MAX. QFE PRESSURE IN HPA 879.7 879.6 876.0 882.0 875.0 870.5 868.2 870.8 880.0 880.0 877.8 878.8 882.0 DAY 10 18 1 5 18 8 2 15 23 23 2 22 MIN. QFE PRESSURE IN HPA 862.8 858.7 861.7 860.3 861.4 861.4 862.6 862.4 869.5 868.5 858.3 856.7 856.7 DAY 25 1 15 2 1 22 8 1 1 14 26 4 MEAN QNH PRESSURE IN HPA 1016.5 1014.5 1015.3 1016.4 1014.7 1011.0 1010.4 1012.4 1019.9 1021.1 1016.3 1017.6 1015.5 MAX. QNH PRESSURE IN HPA 1026.4 1026.2 1022.2 1029.0 1021.0 1015.9 1013.3 1016.3 1026.7 1026.7 1024.2 1025.3 1029.0 DAY 10 18 1 5 18 8 2 15 23 23 2 22 MIN. QNH PRESSURE IN HPA 1007.2 1002.5 1005.9 1004.4 1005.6 1005.6 1007.0 1006.7 1014.8 1013.7 1002.1 1000.3 1000.3 DAY 25 1 15 2 1 22 8 1 1 14 26 4 MEAN QFF PRESSURE IN HPA 1020.3 ****** ****** 1012.7 1008.0 1002.2 1000.2 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1031.2 ****** ****** 1032.9 1017.2 1009.0 1004.7 ****** ****** ****** ****** ****** ****** DAY 10 ** ** 5 18 8 2 ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1010.2 ****** ****** 998.7 998.6 994.9 995.9 ****** ****** ****** ****** ****** ****** DAY 26 ** ** 2 6 22 8 ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 870.5 868.5 868.9 869.9 868.7 865.2 864.8 866.4 873.2 874.3 870.5 871.5 869.4 MAX. QFE PRESSURE IN HPA 879.3 878.5 874.2 880.4 874.4 869.7 867.8 869.9 879.3 879.3 877.1 877.8 880.4 DAY 9 18 1 5 18 8 13 15 23 23 2 22 MIN. QFE PRESSURE IN HPA 861.6 856.9 860.5 860.0 860.2 860.9 862.0 861.4 868.7 867.6 861.3 858.2 856.9 DAY 25 1 12 2 1 22 20 1 1 14 26 4 MEAN QNH PRESSURE IN HPA 1015.9 1013.6 1014.2 1015.2 1013.9 1010.0 1009.4 1011.2 1019.0 1020.2 1015.9 1017.0 1014.6 MAX. QNH PRESSURE IN HPA 1025.9 1025.0 1020.1 1027.1 1020.3 1015.0 1012.9 1015.2 1025.9 1025.9 1023.4 1024.2 1027.1 DAY 9 18 1 5 18 8 13 15 23 23 2 22 MIN. QNH PRESSURE IN HPA 1005.8 1000.5 1004.6 1004.0 1004.2 1005.0 1006.3 1005.6 1013.9 1012.6 1005.5 1002.0 1000.5 DAY 25 1 12 2 1 22 20 1 1 14 26 4 MEAN QFF PRESSURE IN HPA 1019.8 ****** ****** 1011.9 1007.5 1001.4 999.7 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1030.4 ****** ****** 1030.4 1016.7 1008.3 1004.6 ****** ****** ****** ****** ****** ****** DAY 9 ** ** 5 18 8 13 ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1009.8 ****** ****** 1001.0 997.6 994.8 994.9 ****** ****** ****** ****** ****** ****** DAY 16 ** ** 2 1 22 7 ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.1 869.2 869.7 870.4 869.3 865.9 865.1 866.9 873.9 875.3 871.4 872.5 870.1 MAX. QFE PRESSURE IN HPA 880.5 879.0 874.2 879.7 874.9 870.1 868.2 870.0 879.8 879.6 877.7 879.0 880.5 DAY 9 18 3 5 18 8 13 7 22 23 2 7 MIN. QFE PRESSURE IN HPA 861.0 857.4 861.6 861.5 861.5 862.7 862.6 861.8 869.3 868.6 863.8 860.0 857.4 DAY 16 1 12 2 1 16 7 1 2 14 26 4 MEAN QNH PRESSURE IN HPA 1016.6 1014.4 1015.0 1015.8 1014.6 1010.7 1009.8 1011.9 1019.8 1021.4 1017.0 1018.1 1015.4 MAX. QNH PRESSURE IN HPA 1027.3 1025.6 1020.1 1026.4 1020.9 1015.5 1013.3 1015.4 1026.5 1026.2 1024.1 1025.6 1027.3 DAY 9 18 3 5 18 8 13 7 22 23 2 7 MIN. QNH PRESSURE IN HPA 1005.2 1001.1 1005.8 1005.7 1005.7 1007.1 1007.0 1006.1 1014.6 1013.8 1008.3 1004.0 1001.1 DAY 16 1 12 2 1 16 7 1 2 14 26 4 MEAN QFF PRESSURE IN HPA 1020.4 1018.6 1015.1 1013.3 1008.6 1002.7 1000.7 1003.1 1015.9 1019.5 1015.9 1022.0 1013.0 MAX. QFF PRESSURE IN HPA 1032.9 1031.7 1023.6 1029.9 1018.0 1008.7 1005.7 1007.0 1023.3 1025.0 1022.1 1033.4 1033.4 DAY 9 18 1 5 18 8 1 7 22 23 2 7 MIN. QFF PRESSURE IN HPA 1008.8 1000.2 1004.4 1003.4 1001.3 996.8 996.3 995.7 1008.5 1011.6 1008.2 1003.9 995.7 DAY 16 1 7 26 1 16 7 1 1 14 23 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 871.7 ****** ****** 871.6 870.6 867.5 866.7 ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 881.8 ****** ****** 880.5 876.2 871.3 869.6 ****** ****** ****** ****** ****** ****** DAY 9 ** ** 5 18 8 13 ** ** ** ** ** MIN. QFE PRESSURE IN HPA 860.9 ****** ****** 863.8 863.1 863.8 863.7 ****** ****** ****** ****** ****** ****** DAY 16 ** ** 2 1 16 20 ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1017.3 ****** ****** 1017.2 1016.1 1012.5 1011.6 ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1028.7 ****** ****** 1027.3 1022.4 1016.8 1014.9 ****** ****** ****** ****** ****** ****** DAY 9 ** ** 5 18 8 13 ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1005.0 ****** ****** 1008.3 1007.5 1008.3 1008.2 ****** ****** ****** ****** ****** ****** DAY 16 ** ** 2 1 16 20 ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1021.5 ****** ****** 1014.1 1009.5 1003.9 1001.9 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.9 ****** ****** 1031.4 1020.2 1009.3 1006.2 ****** ****** ****** ****** ****** ****** DAY 9 ** ** 5 18 8 1 ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1007.3 ****** ****** 1004.1 1001.3 996.9 997.3 ****** ****** ****** ****** ****** ****** DAY 16 ** ** 26 1 16 20 ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 871.2 ****** ****** 871.2 870.4 867.1 866.6 ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 881.4 ****** ****** 879.8 875.7 871.0 869.3 ****** ****** ****** ****** ****** ****** DAY 9 ** ** 5 18 8 1 ** ** ** ** ** MIN. QFE PRESSURE IN HPA 859.3 ****** ****** 863.1 862.5 863.3 863.3 ****** ****** ****** ****** ****** ****** DAY 16 ** ** 2 1 15 20 ** ** ** ** ** MEAN QNH PRESSURE IN HPA 1016.7 ****** ****** 1016.7 1015.8 1012.1 1011.5 ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1028.3 ****** ****** 1026.5 1021.8 1016.5 1014.6 ****** ****** ****** ****** ****** ****** DAY 9 ** ** 5 18 8 1 ** ** ** ** ** MIN. QNH PRESSURE IN HPA 1003.2 ****** ****** 1007.5 1006.9 1007.8 1007.8 ****** ****** ****** ****** ****** ****** DAY 16 ** ** 2 1 15 20 ** ** ** ** ** MEAN QFF PRESSURE IN HPA 1020.3 ****** ****** 1013.1 1008.9 1003.2 1001.3 ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1033.4 ****** ****** 1030.1 1018.9 1009.0 1005.9 ****** ****** ****** ****** ****** ****** DAY 9 ** ** 5 18 8 2 ** ** ** ** ** MIN. QFF PRESSURE IN HPA 1005.8 ****** ****** 1002.8 999.9 996.2 996.5 ****** ****** ****** ****** ****** ****** DAY 16 ** ** 25 1 16 20 ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1995 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.3 4.0 7.7 14.7 19.9 24.1 27.4 24.8 19.4 13.6 10.9 0.9 14.2 MINIMUN AIR TEMPERATURE (C) -2.5 -2.1 0.7 7.3 10.0 13.8 18.4 16.6 11.1 4.8 2.2 -3.5 6.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 5 0 0 0 0 0 5 DAYS WITH MINIMUM TEMP. <=-4 7 9 4 0 0 0 0 0 0 1 3 14 38 DAYS WITH FREEZING MIN.<= 0 28 16 12 0 0 0 0 0 0 5 10 28 99 TEMPERATURE RECORDS LOWEST(C) -8.6 -13.0 -5.4 2.0 5.0 9.0 13.8 12.4 6.0 -6.0 -5.6 -7.6 -13.0 DAY 20 26 7 7 21 1 26 8 23 19 29 21 MAXIMUM AIR TEMPERATURE (C) 8.4 9.0 13.0 20.1 24.7 29.3 33.5 33.0 26.9 19.6 17.6 6.5 20.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 13 28 27 9 1 0 0 80 DAYS WITH MAXIMUM TEMP. <= 0 1 1 0 0 0 0 0 0 0 0 0 2 4 TEMPERATURE RECORDS HIGHEST(C) 15.4 15.0 22.0 29.6 33.0 38.0 40.6 38.2 33.6 30.0 25.0 13.8 40.6 DAY 17 4 25 4 7 30 16 12 20 4 11 31 DIF. BETWEEN (MAX.-MIN.) (C) 10.9 11.1 12.3 12.8 14.7 15.5 15.1 16.4 15.8 14.8 15.4 10.0 13.7 MEAN DAILY TEMP. (MDT) (C) 3.0 3.5 6.8 13.7 17.3 21.6 26.0 24.8 19.0 12.2 9.9 1.5 13.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 6.2 39.1 154.3 118.1 13.3 0.0 0.0 0.0 331.0 HEATING DEG. DAYS(BASE 18 0C) 466.2 407.0 346.1 132.1 44.2 3.7 0.0 0.0 26.1 186.1 243.2 511.9 2366.7 DEWPOINT (MEAN C) -2.6 -1.9 -0.7 3.2 1.1 5.3 7.0 5.8 1.0 0.9 -4.0 -4.4 0.9 MIXING RATIO (G/KG) 3.68 3.92 4.37 5.84 5.23 6.76 7.79 7.18 5.19 4.97 3.41 3.22 5.13 VAPOUR PRESSURE (HPA) 5.13 5.45 6.06 8.07 7.24 9.31 10.69 9.89 7.18 6.92 4.76 4.51 7.10 SATURATION DEF. (HPA) 3.04 3.20 5.09 9.74 16.90 22.13 27.26 22.87 16.86 10.15 9.78 2.30 12.44 RELATIVE HUMIDITY (MEAN %) 69 69 61 53 33 35 32 34 36 48 41 70 48 RELATIVE HUMIDITY (MAX. %) 88 91 86 76 53 55 53 56 58 75 65 86 70 RELATIVE HUMIDITY (MIN. %) 51 50 43 36 21 23 20 17 21 29 26 48 32 RELATIVE HUMIDITY (MEAN% 03UTC) 87 91 84 75 53 55 52 48 55 76 64 83 69 RELATIVE HUMIDITY (MEAN% 09UTC) 56 58 49 43 25 26 22 20 24 33 28 52 36 RELATIVE HUMIDITY (MEAN% 15UTC) 73 67 60 50 30 30 26 25 31 47 42 67 46 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 37.0 37.6 37.3 40.0 6.2 6.8 2.0 0.0 13.3 20.7 8.1 4.9 213.9 DAYS WITH PRECIPITATION >=10 1 1 1 0 0 0 0 0 0 1 0 0 4 DAYS WITH PRECIPITATION >= 5 2 3 1 2 0 1 0 0 1 1 1 0 12 DAYS WITH PRECIPITATION >= 1 6 6 7 11 2 2 1 0 4 2 2 2 45 DAYS WITH PRECIPITATION 9 8 10 16 6 6 1 0 5 2 3 7 73 GREATEST DAILY PRECIPITATION 21.0 17.0 23.0 6.0 3.0 5.0 2.0 0.0 5.0 16.0 7.0 2.0 23.0 DAY 18 24 18 18 28 8 5 ** 22 17 26 5 DAY WITH THUNDER STORM 0 0 0 3 2 3 0 0 2 1 0 0 11 DAYS WITH SNOW OR SLEET 7 3 2 0 0 0 0 0 0 0 2 4 18 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 1 0 1 WIND DIRECTION (PREVAILING) 135 135 315 135 45 315 45 90 135 315 135 135 135 PREVAILING WIND SPEED(KNOTS) 5.3 5.3 6.1 6.0 7.2 6.0 9.0 6.8 6.7 5.6 7.2 5.6 6.4 PREVAILING WIND PERCENT 16.1 20.7 18.7 18.7 20.0 20.7 26.3 17.7 19.5 16.8 19.3 14.0 16.7 CALMS PERCENT OF WIND 64.5 39.3 38.1 37.3 23.2 19.3 26.3 38.7 42.4 50.3 54.7 58.7 41.6 NO. OF WIND OBSERVATION 155 140 155 150 155 150 175 248 210 155 150 235 2078 VECTOR WIND DIRECTION (MEAN) 143 210 151 172 91 57 58 76 104 158 177 154 96 VECTOR WIND MAGNITUDE(KNOTS) 0.4 0.5 0.6 0.6 2.3 1.9 2.9 2.2 1.3 0.7 0.9 0.7 0.9 WIND STEADINESES (MEAN %) 22.2 14.7 15.8 16.7 41.8 33.9 50.9 51.2 36.1 23.3 30.0 33.3 23.7 WIND SPEED (MEAN KNOTS) 1.8 3.4 3.8 3.6 5.5 5.6 5.7 4.3 3.6 3.0 3.0 2.1 3.8 FASTEST WIND DIRECTION 210 320 150 150 70 60 60 50 310 150 210 150 70 FASTEST WIND SPEED (KNOTS) 14 14 16 14 19 17 14 17 19 14 16 12 19 DAY 17 24 14 5 13 11 3 10 20 5 11 3 DAYS WITH SKY CLEAR (0-2)/8 18 13 14 5 15 20 26 28 22 24 23 13 221 DAYS WITH P.CLOUDY (3-6)/8 7 8 9 12 16 9 5 3 7 5 5 12 98 DAYS WITH CLOUDY (7-8)/8 6 7 8 13 0 1 0 0 1 2 2 6 46 DAYS WITH VISIBILITY =< 2 KM 5 3 4 3 0 0 0 0 1 1 0 1 18 DURATION OF SUNSHINE HOURS 96.1 ****** ****** ****** ****** 189.3 354.4 355.7 240.8 ****** 124.2 153.0 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 872.7 870.8 870.0 868.9 871.1 867.7 865.6 868.2 870.4 874.0 872.0 873.9 870.4 MAX. QFE PRESSURE IN HPA 882.0 878.0 878.5 875.7 876.7 873.1 870.0 874.6 876.6 884.0 880.9 880.6 884.0 DAY-HOUR 7- 6 12- 6 3- 6 7- 6 26- 6 9- 6 4- 3 25- 3 13- 6 18- 6 16- 6 10-18 MIN. QFE PRESSURE IN HPA 865.2 861.2 858.4 864.3 864.7 860.3 858.8 863.0 862.9 866.5 858.6 867.9 858.4 DAY-HOUR 1-12 5-12 26-12 17-12 7-12 30-12 16-12 3-12 19-15 11-12 26- 3 25-12 MEAN QNH PRESSURE IN HPA 1018.4 1016.3 1015.3 1014.1 1016.6 1012.7 1010.4 1013.3 1015.7 1019.9 1017.6 1019.7 1015.8 MAX. QNH PRESSURE IN HPA 1029.0 1024.4 1025.0 1021.8 1022.9 1018.9 1015.4 1020.6 1022.8 1031.2 1027.7 1027.4 1031.2 DAY-HOUR 7- 6 12- 6 3- 6 7- 6 26- 6 9- 6 4- 3 25- 3 13- 6 18- 6 16- 6 10-18 MIN. QNH PRESSURE IN HPA 1009.9 1005.4 1002.2 1008.9 1009.3 1004.4 1002.7 1007.4 1007.3 1011.4 1002.4 1013.0 1002.2 DAY-HOUR 1-12 5-12 26-12 17-12 7-12 30-12 16-12 3-12 19-15 11-12 26- 3 25-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.4 1008.9 ****** ****** 1023.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1012.6 1019.3 ****** ****** 1033.8 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 25- 3 22- 6 **-** **-** 11- 3 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.4 997.8 ****** ****** 1014.8 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 3- 9 20-12 **-** **-** 25-12 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 868.2 870.3 ****** ****** 873.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 873.7 875.6 ****** ****** 880.2 ****** DAY ** ** ** ** ** ** ** 25 22 ** ** 11 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 863.7 865.5 ****** ****** 869.2 ****** DAY ** ** ** ** ** ** ** 23 20 ** ** 26 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1013.3 1015.8 ****** ****** 1019.8 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1019.5 1021.7 ****** ****** 1026.9 ****** DAY ** ** ** ** ** ** ** 25 22 ** ** 11 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.2 1010.3 ****** ****** 1014.4 ****** DAY ** ** ** ** ** ** ** 23 20 ** ** 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.3 1008.2 ****** ****** 1022.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1010.5 1017.7 ****** ****** 1033.0 ****** DAY ** ** ** ** ** ** ** 25 22 ** ** 11 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.5 1000.5 ****** ****** 1015.4 ****** DAY ** ** ** ** ** ** ** 23 20 ** ** 26 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 872.7 871.1 870.3 869.3 871.9 868.8 866.5 868.9 871.0 874.6 872.4 874.1 871.0 MAX. QFE PRESSURE IN HPA 880.7 876.8 877.0 875.0 876.4 873.0 870.0 874.6 876.2 883.0 880.5 880.3 883.0 DAY 7 12 3 7 26 1 4 25 13 18 16 11 MIN. QFE PRESSURE IN HPA 866.2 864.0 858.5 864.6 867.1 862.4 861.7 864.3 866.0 869.0 858.6 870.1 858.5 DAY 12 9 26 16 7 30 16 23 19 4 26 26 MEAN QNH PRESSURE IN HPA 1018.4 1016.6 1015.7 1014.5 1017.5 1014.0 1011.3 1014.1 1016.5 1020.5 1018.1 1020.0 1016.5 MAX. QNH PRESSURE IN HPA 1027.5 1023.1 1023.3 1021.0 1022.6 1018.8 1015.4 1020.6 1022.4 1030.1 1027.3 1027.0 1030.1 DAY 7 12 3 7 26 1 4 25 13 18 16 11 MIN. QNH PRESSURE IN HPA 1011.0 1008.6 1002.3 1009.2 1012.1 1006.7 1005.9 1008.9 1010.8 1014.2 1002.4 1015.5 1002.3 DAY 12 9 26 16 7 30 16 23 19 4 26 26 MEAN QFF PRESSURE IN HPA 1021.9 1019.4 1016.6 1011.3 1011.9 1006.0 1001.3 1005.0 1010.9 1018.9 1018.3 1024.5 1013.8 MAX. QFF PRESSURE IN HPA 1031.1 1026.7 1027.0 1022.6 1019.0 1013.2 1006.1 1012.6 1019.0 1033.2 1029.8 1033.8 1033.8 DAY 7 18 3 7 26 1 25 25 22 18 28 11 MIN. QFF PRESSURE IN HPA 1012.9 1008.3 997.7 1004.5 1003.9 995.1 993.8 998.5 1002.7 1008.6 1001.9 1018.1 993.8 DAY 12 9 26 16 7 30 16 23 19 4 26 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 873.8 871.8 871.1 869.8 871.9 868.5 866.2 869.1 871.4 875.2 873.2 874.9 871.4 MAX. QFE PRESSURE IN HPA 882.0 878.0 878.5 875.7 876.7 873.1 869.2 874.5 876.6 884.0 880.9 880.3 884.0 DAY 7 12 3 7 26 9 23 25 13 18 16 11 MIN. QFE PRESSURE IN HPA 867.2 864.8 859.5 865.3 866.8 862.4 860.7 865.2 866.1 869.0 861.0 870.8 859.5 DAY 12 9 26 18 7 30 16 3 20 4 26 25 MEAN QNH PRESSURE IN HPA 1019.6 1017.4 1016.6 1015.1 1017.5 1013.7 1011.1 1014.3 1016.9 1021.2 1018.9 1020.9 1016.9 MAX. QNH PRESSURE IN HPA 1029.0 1024.4 1025.0 1021.8 1022.9 1018.9 1014.4 1020.5 1022.8 1031.2 1027.7 1027.0 1031.2 DAY 7 12 3 7 26 9 23 25 13 18 16 11 MIN. QNH PRESSURE IN HPA 1012.2 1009.5 1003.4 1010.0 1011.7 1006.7 1004.8 1009.9 1010.9 1014.2 1005.2 1016.3 1003.4 DAY 12 9 26 18 7 30 16 3 20 4 26 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.2 1009.7 ****** ****** 1024.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.6 1019.3 ****** ****** 1033.5 ****** DAY ** ** ** ** ** ** ** 25 22 ** ** 11 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.9 1001.7 ****** ****** 1019.1 ****** DAY ** ** ** ** ** ** ** 3 19 ** ** 6 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 872.4 870.8 870.0 868.9 870.9 867.5 865.2 867.8 870.1 873.7 871.5 873.5 870.2 MAX. QFE PRESSURE IN HPA 881.0 878.0 878.5 874.2 876.5 872.4 867.8 872.8 875.3 883.0 879.0 879.7 883.0 DAY 7 12 3 7 26 1 23 25 13 25 15 10 MIN. QFE PRESSURE IN HPA 865.8 862.6 859.3 865.3 865.6 861.4 859.6 863.8 864.8 867.7 861.0 869.2 859.3 DAY 1 5 26 17 7 30 16 3 19 11 26 25 MEAN QNH PRESSURE IN HPA 1018.0 1016.2 1015.3 1014.1 1016.4 1012.5 1009.9 1012.9 1015.4 1019.5 1017.1 1019.3 1015.6 MAX. QNH PRESSURE IN HPA 1027.8 1024.4 1025.0 1020.1 1022.7 1018.1 1012.9 1018.5 1021.4 1030.1 1025.6 1026.4 1030.1 DAY 7 12 3 7 26 1 23 25 13 25 15 10 MIN. QNH PRESSURE IN HPA 1010.6 1007.0 1003.2 1010.0 1010.4 1005.6 1003.6 1008.3 1009.5 1012.8 1005.2 1014.4 1003.2 DAY 1 5 26 17 7 30 16 3 19 11 26 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1002.5 1007.8 ****** ****** 1022.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.9 1016.4 ****** ****** 1031.5 ****** DAY ** ** ** ** ** ** ** 25 22 ** ** 10 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.4 1000.0 ****** ****** 1015.8 ****** DAY ** ** ** ** ** ** ** 3 20 ** ** 26 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 871.8 869.9 869.0 868.2 870.3 866.7 864.4 866.9 869.1 872.9 871.0 872.7 869.4 MAX. QFE PRESSURE IN HPA 880.0 876.7 877.3 873.3 875.9 871.6 867.4 871.5 873.8 882.0 879.0 879.7 882.0 DAY 6 12 3 13 26 2 31 25 13 25 15 10 MIN. QFE PRESSURE IN HPA 865.2 861.2 858.4 864.3 864.7 860.3 858.8 863.0 863.1 866.5 864.0 867.9 858.4 DAY 1 5 26 17 7 30 16 3 19 11 26 25 MEAN QNH PRESSURE IN HPA 1017.4 1015.2 1014.2 1013.3 1015.6 1011.6 1009.0 1011.8 1014.4 1018.6 1016.5 1018.4 1014.7 MAX. QNH PRESSURE IN HPA 1026.7 1022.9 1023.6 1019.1 1022.0 1017.2 1012.4 1017.1 1019.7 1029.0 1025.6 1026.4 1029.0 DAY 6 12 3 13 26 2 31 25 13 25 15 10 MIN. QNH PRESSURE IN HPA 1009.9 1005.4 1002.2 1008.9 1009.3 1004.4 1002.7 1007.4 1007.5 1011.4 1008.6 1013.0 1002.2 DAY 1 5 26 17 7 30 16 3 19 11 26 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1001.9 1007.2 ****** ****** 1021.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1007.8 1016.6 ****** ****** 1031.6 ****** DAY ** ** ** ** ** ** ** 25 22 ** ** 10 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 996.5 997.8 ****** ****** 1014.8 ****** DAY ** ** ** ** ** ** ** 3 20 ** ** 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 872.8 870.7 869.7 868.6 870.6 867.0 864.9 867.4 869.7 873.8 872.0 873.7 870.1 MAX. QFE PRESSURE IN HPA 881.0 877.2 877.6 872.7 875.6 871.8 868.6 872.6 874.4 883.0 880.7 880.4 883.0 DAY 7 12 3 12 26 2 31 24 27 17 15 10 MIN. QFE PRESSURE IN HPA 865.7 862.6 861.2 864.6 865.1 860.3 860.0 863.2 862.9 868.3 864.7 868.6 860.0 DAY 1 5 26 17 7 30 16 22 19 12 25 25 MEAN QNH PRESSURE IN HPA 1018.5 1016.1 1015.1 1013.7 1016.1 1011.9 1009.5 1012.4 1015.0 1019.7 1017.6 1019.5 1015.4 MAX. QNH PRESSURE IN HPA 1027.8 1023.5 1024.0 1018.4 1021.7 1017.4 1013.8 1018.3 1020.3 1030.1 1027.5 1027.1 1030.1 DAY 7 12 3 12 26 2 31 24 27 17 15 10 MIN. QNH PRESSURE IN HPA 1010.5 1007.0 1005.4 1009.2 1009.8 1004.4 1004.0 1007.6 1007.3 1013.4 1009.3 1013.8 1004.0 DAY 1 5 26 17 7 30 16 22 19 12 25 25 MEAN QFF PRESSURE IN HPA 1021.9 1018.9 1015.8 1010.5 1010.5 1003.9 999.6 1003.3 1009.4 1018.0 1017.8 1023.7 1012.8 MAX. QFF PRESSURE IN HPA 1031.6 1026.7 1027.4 1018.4 1018.2 1011.1 1004.2 1010.1 1017.3 1030.4 1030.0 1032.8 1032.8 DAY 7 17 3 7 26 1 31 24 22 17 15 10 MIN. QFF PRESSURE IN HPA 1013.4 1006.5 1003.2 1005.0 1000.5 992.9 991.7 997.7 998.4 1007.5 1005.1 1017.6 991.7 DAY 1 5 25 19 7 30 16 22 19 4 11 25 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 868.8 871.0 ****** ****** 874.3 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 874.3 875.4 ****** ****** 880.6 ****** DAY ** ** ** ** ** ** ** 24 12 ** ** 10 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 864.2 866.2 ****** ****** 869.4 ****** DAY ** ** ** ** ** ** ** 22 20 ** ** 25 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1014.0 1016.5 ****** ****** 1020.2 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1020.2 1021.5 ****** ****** 1027.4 ****** DAY ** ** ** ** ** ** ** 24 12 ** ** 10 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.8 1011.0 ****** ****** 1014.7 ****** DAY ** ** ** ** ** ** ** 22 20 ** ** 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1004.0 1008.7 ****** ****** 1024.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1011.6 1017.1 ****** ****** 1033.1 ****** DAY ** ** ** ** ** ** ** 24 22 ** ** 10 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.5 1001.5 ****** ****** 1018.0 ****** DAY ** ** ** ** ** ** ** 3 19 ** ** 25 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 868.5 870.5 ****** ****** 874.0 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 874.0 875.0 ****** ****** 880.3 ****** DAY ** ** ** ** ** ** ** 24 12 ** ** 10 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 864.0 866.0 ****** ****** 869.4 ****** DAY ** ** ** ** ** ** ** 22 20 ** ** 25 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1013.7 1016.0 ****** ****** 1019.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1019.9 1021.0 ****** ****** 1027.0 ****** DAY ** ** ** ** ** ** ** 24 12 ** ** 10 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.6 1010.8 ****** ****** 1014.7 ****** DAY ** ** ** ** ** ** ** 22 20 ** ** 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1003.3 1008.2 ****** ****** 1022.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1010.3 1014.6 ****** ****** 1032.9 ****** DAY ** ** ** ** ** ** ** 24 22 ** ** 10 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.4 1000.8 ****** ****** 1015.8 ****** DAY ** ** ** ** ** ** ** 22 20 ** ** 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1996 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.2 1.3 5.4 12.2 19.1 24.4 26.5 25.1 23.2 12.8 6.4 4.5 13.4 MINIMUN AIR TEMPERATURE (C) -5.9 -3.2 1.2 5.6 10.9 14.6 16.8 14.5 13.4 6.6 0.3 -0.6 6.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 19 12 2 0 0 0 0 0 0 0 2 6 41 DAYS WITH FREEZING MIN.<= 0 26 23 8 3 0 0 0 0 0 1 19 15 95 TEMPERATURE RECORDS LOWEST(C) -13.2 -13.4 -8.6 -3.6 3.4 10.0 13.2 5.0 7.8 -0.6 -6.6 -7.6 -13.4 DAY 12 4 1 5 3 18 15 31 1 3 14 6 MAXIMUM AIR TEMPERATURE (C) 4.9 6.4 9.1 16.9 24.0 29.2 31.0 30.6 29.8 20.6 12.4 11.4 18.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 5 12 27 19 15 0 0 0 78 DAYS WITH MAXIMUM TEMP. <= 0 9 3 0 0 0 0 0 0 0 0 0 0 12 TEMPERATURE RECORDS HIGHEST(C) 15.4 14.0 21.0 24.4 32.0 35.4 35.0 36.4 36.6 28.0 19.4 18.2 36.6 DAY 6 18 31 13 17 5 8 27 8 14 7 29 DIF. BETWEEN (MAX.-MIN.) (C) 10.8 9.6 7.9 11.3 13.1 14.6 14.2 16.1 16.4 14.0 12.1 12.0 12.7 MEAN DAILY TEMP. (MDT) (C) -0.5 1.6 5.2 11.2 17.5 21.9 23.9 22.6 21.6 13.6 6.4 5.4 12.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 7.8 44.9 92.4 63.0 45.4 0.0 0.0 0.0 253.5 HEATING DEG. DAYS(BASE 18 0C) 573.4 475.3 397.9 203.4 49.3 0.4 0.0 3.0 3.7 137.0 348.7 390.1 2582.2 DEWPOINT (MEAN C) -6.4 -3.6 0.8 3.2 5.5 5.5 6.1 0.9 4.3 1.0 -1.9 -4.0 0.9 MIXING RATIO (G/KG) 2.91 3.52 4.81 5.91 6.80 6.98 7.10 5.22 6.54 5.05 3.91 3.40 5.18 VAPOUR PRESSURE (HPA) 4.06 4.89 6.67 8.18 9.40 9.63 9.80 7.22 9.02 7.03 5.47 4.75 7.18 SATURATION DEF. (HPA) 2.49 2.20 2.72 7.02 13.90 21.92 25.77 26.20 21.29 8.63 4.68 4.25 11.76 RELATIVE HUMIDITY (MEAN %) 66 73 74 58 46 35 31 24 36 52 60 58 51 RELATIVE HUMIDITY (MAX. %) 82 86 89 79 67 59 55 41 57 75 79 79 71 RELATIVE HUMIDITY (MIN. %) 46 53 61 44 33 22 19 15 21 30 40 37 35 RELATIVE HUMIDITY (MEAN% 03UTC) 79 79 88 76 65 59 55 41 56 70 78 74 68 RELATIVE HUMIDITY (MEAN% 09UTC) 51 62 68 48 37 26 21 18 27 35 43 42 40 RELATIVE HUMIDITY (MEAN% 15UTC) 64 71 73 59 43 29 23 21 34 46 61 58 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 9.1 50.8 65.2 43.7 28.5 1.7 2.0 0.3 10.0 12.4 28.4 14.4 266.5 DAYS WITH PRECIPITATION >=10 0 2 1 2 0 0 0 0 1 0 1 0 7 DAYS WITH PRECIPITATION >= 5 0 4 7 3 2 0 0 0 1 0 1 1 19 DAYS WITH PRECIPITATION >= 1 3 7 13 5 7 1 1 0 1 5 1 3 47 DAYS WITH PRECIPITATION 7 10 20 16 12 1 2 1 2 8 3 6 88 GREATEST DAILY PRECIPITATION 4.0 18.1 13.0 15.0 7.0 1.7 2.0 0.3 10.0 4.0 28.0 9.0 28.0 DAY 9 3 5 29 1 26 13 14 24 15 12 15 DAY WITH THUNDER STORM 0 0 2 1 1 0 1 0 0 0 0 0 5 DAYS WITH SNOW OR SLEET 7 7 4 0 0 0 0 0 0 0 2 2 22 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 135 135 135 135 135 45 45 45 135 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 5.7 7.6 7.2 7.9 6.7 8.4 7.4 6.3 6.0 5.5 5.2 5.2 6.5 PREVAILING WIND PERCENT 13.1 20.8 29.7 32.0 29.7 33.3 34.8 29.7 23.3 17.2 20.7 16.9 19.0 CALMS PERCENT OF WIND 63.3 47.2 36.8 25.3 24.5 13.3 26.5 34.2 34.7 52.9 52.0 64.1 41.8 NO. OF WIND OBSERVATION 221 212 155 150 155 150 155 155 150 227 198 195 2123 VECTOR WIND DIRECTION (MEAN) 257 144 166 133 122 72 42 75 115 212 149 154 101 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.7 1.5 2.5 1.7 3.4 3.3 2.5 1.1 0.3 0.7 0.8 1.1 WIND STEADINESES (MEAN %) 13.6 18.9 34.9 43.9 37.0 50.7 66.0 65.8 29.7 11.1 29.2 44.4 28.2 WIND SPEED (MEAN KNOTS) 2.2 3.7 4.3 5.7 4.6 6.7 5.0 3.8 3.7 2.7 2.4 1.8 3.9 FASTEST WIND DIRECTION 260 180 150 90 150 150 60 70 160 310 150 150 70 FASTEST WIND SPEED (KNOTS) 14 16 16 17 14 19 16 29 12 17 12 12 29 DAY 7 27 13 28 27 6 9 2 17 12 1 8 DAYS WITH SKY CLEAR (0-2)/8 12 9 2 7 11 22 26 27 26 18 21 15 196 DAYS WITH P.CLOUDY (3-6)/8 17 9 12 12 12 6 5 4 3 10 6 10 106 DAYS WITH CLOUDY (7-8)/8 2 11 17 11 8 2 0 0 1 3 3 6 64 DAYS WITH VISIBILITY =< 2 KM 1 5 2 1 0 0 0 0 0 0 0 2 11 DURATION OF SUNSHINE HOURS 194.2 146.4 132.5 196.2 266.3 332.8 367.0 350.2 291.3 247.3 222.3 174.0 2920.5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 873.2 870.0 868.6 870.5 871.0 868.6 868.9 869.6 868.8 873.6 875.9 874.4 871.1 MAX. QFE PRESSURE IN HPA 883.0 876.7 873.5 878.1 876.2 874.4 875.3 878.1 877.0 883.6 885.8 881.8 885.8 DAY-HOUR 10- 6 13- 6 22- 6 5- 3 4- 6 12- 3 3- 9 30- 3 25- 6 2- 6 18- 6 8- 6 MIN. QFE PRESSURE IN HPA 863.5 857.5 859.5 860.9 865.8 861.4 863.4 862.6 861.4 862.2 869.6 866.0 857.5 DAY-HOUR 6-21 5-12 26- 9 10-12 29-15 6-12 6-12 8-12 22-12 27-12 29-12 25- 3 MEAN QNH PRESSURE IN HPA 1019.0 1015.4 1013.8 1015.9 1016.5 1013.8 1014.1 1014.8 1013.9 1019.4 1022.1 1020.3 1016.6 MAX. QNH PRESSURE IN HPA 1030.1 1022.9 1019.3 1024.5 1022.4 1020.3 1021.4 1024.5 1023.3 1030.8 1033.3 1028.7 1033.3 DAY-HOUR 10- 6 13- 6 22- 6 5- 3 4- 6 12- 3 3- 9 30- 3 25- 6 2- 6 18- 6 8- 6 MIN. QNH PRESSURE IN HPA 1008.0 1001.2 1003.4 1005.0 1010.6 1005.6 1007.9 1007.0 1005.6 1006.5 1014.9 1010.8 1001.2 DAY-HOUR 6-21 5-12 26- 9 10-12 29-15 6-12 6-12 8-12 22-12 27-12 29-12 25- 3 MEAN QFF PRESSURE IN HPA 1022.9 1018.3 ****** ****** ****** ****** ****** ****** ****** 1016.6 1021.3 1024.0 ****** MAX. QFF PRESSURE IN HPA 1037.5 1030.2 ****** ****** ****** ****** ****** ****** ****** 1029.4 1037.2 1033.5 ****** DAY-HOUR 10- 6 3-21 **-** **-** **-** **-** **-** **-** **-** 2-18 19- 3 7- 3 MIN. QFF PRESSURE IN HPA 1003.6 1004.6 ****** ****** ****** ****** ****** ****** ****** 1004.0 1013.8 1011.0 ****** DAY-HOUR 6-21 10- 0 **-** **-** **-** **-** **-** **-** **-** 14-12 6-12 23- 3 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 873.1 869.5 ****** ****** ****** ****** ****** ****** ****** 874.2 874.1 ****** ****** MAX. QFE PRESSURE IN HPA 881.6 874.5 ****** ****** ****** ****** ****** ****** ****** 881.6 877.7 ****** ****** DAY 10 13 ** ** ** ** ** ** ** 2 24 ** MIN. QFE PRESSURE IN HPA 863.5 860.0 ****** ****** ****** ****** ****** ****** ****** 869.3 870.4 ****** ****** DAY 7 6 ** ** ** ** ** ** ** 6 29 ** MEAN QNH PRESSURE IN HPA 1018.9 1014.7 ****** ****** ****** ****** ****** ****** ****** 1020.1 1020.0 ****** ****** MAX. QNH PRESSURE IN HPA 1028.5 1020.5 ****** ****** ****** ****** ****** ****** ****** 1028.5 1024.1 ****** ****** DAY 10 13 ** ** ** ** ** ** ** 2 24 ** MIN. QNH PRESSURE IN HPA 1008.0 1004.0 ****** ****** ****** ****** ****** ****** ****** 1014.6 1015.8 ****** ****** DAY 7 6 ** ** ** ** ** ** ** 6 29 ** MEAN QFF PRESSURE IN HPA 1021.8 1017.3 ****** ****** ****** ****** ****** ****** ****** 1016.4 1019.0 ****** ****** MAX. QFF PRESSURE IN HPA 1035.9 1027.6 ****** ****** ****** ****** ****** ****** ****** 1027.2 1024.5 ****** ****** DAY 11 4 ** ** ** ** ** ** ** 3 25 ** MIN. QFF PRESSURE IN HPA 1004.9 1004.6 ****** ****** ****** ****** ****** ****** ****** 1009.3 1015.7 ****** ****** DAY 7 10 ** ** ** ** ** ** ** 15 29 ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 873.2 870.1 868.8 870.8 871.5 869.7 869.9 870.4 869.7 873.7 876.8 874.0 871.6 MAX. QFE PRESSURE IN HPA 882.2 875.6 872.6 878.1 875.6 874.4 875.3 878.1 876.5 883.2 884.9 881.0 884.9 DAY 10 13 22 5 4 12 4 30 25 2 19 8 MIN. QFE PRESSURE IN HPA 864.9 860.6 861.4 864.1 868.1 865.7 865.4 865.2 862.5 864.9 870.4 866.0 860.6 DAY 7 6 26 10 30 19 6 8 9 27 29 25 MEAN QNH PRESSURE IN HPA 1019.0 1015.5 1014.0 1016.3 1017.0 1015.1 1015.3 1015.8 1015.1 1019.5 1023.0 1019.9 1017.1 MAX. QNH PRESSURE IN HPA 1029.2 1021.7 1018.3 1024.5 1021.7 1020.3 1021.4 1024.5 1022.7 1030.3 1032.2 1027.8 1032.2 DAY 10 13 22 5 4 12 4 30 25 2 19 8 MIN. QNH PRESSURE IN HPA 1009.6 1004.7 1005.6 1008.7 1013.2 1010.5 1010.1 1009.9 1006.9 1009.6 1015.8 1010.8 1004.7 DAY 7 6 26 10 30 19 6 8 9 27 29 25 MEAN QFF PRESSURE IN HPA 1024.4 1019.1 1015.5 1014.5 1011.5 1006.9 1006.0 1008.0 1008.2 1017.1 1024.7 1022.5 1014.9 MAX. QFF PRESSURE IN HPA 1037.2 1027.9 1023.0 1028.8 1018.8 1014.4 1013.1 1021.0 1018.4 1028.6 1037.2 1033.5 1037.2 DAY 11 4 1 5 4 12 4 30 25 3 19 7 MIN. QFF PRESSURE IN HPA 1007.5 1007.0 1002.6 1004.9 1005.6 999.9 1000.7 1001.4 996.8 1006.2 1017.6 1011.0 996.8 DAY 7 10 26 19 30 5 6 8 9 27 29 23 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 874.2 870.8 869.5 871.2 871.7 869.5 869.6 870.5 870.0 874.2 877.5 874.9 872.0 MAX. QFE PRESSURE IN HPA 883.0 876.7 873.5 878.1 876.2 873.4 875.2 878.1 877.0 883.6 885.8 881.8 885.8 DAY 10 13 22 5 4 12 3 30 25 2 18 8 MIN. QFE PRESSURE IN HPA 866.6 862.4 860.9 864.1 867.6 864.4 866.1 864.6 863.5 864.3 871.2 867.5 860.9 DAY 7 5 26 10 30 6 6 8 22 27 29 25 MEAN QNH PRESSURE IN HPA 1020.2 1016.3 1014.8 1016.7 1017.3 1014.7 1014.9 1015.9 1015.4 1020.1 1023.8 1020.9 1017.6 MAX. QNH PRESSURE IN HPA 1030.1 1022.9 1019.3 1024.5 1022.4 1019.2 1021.2 1024.5 1023.3 1030.8 1033.3 1028.7 1033.3 DAY 10 13 22 5 4 12 3 30 25 2 18 8 MIN. QNH PRESSURE IN HPA 1011.5 1006.7 1005.0 1008.7 1012.6 1009.0 1010.9 1009.2 1008.0 1008.9 1016.7 1012.5 1005.0 DAY 7 5 26 10 30 6 6 8 22 27 29 25 MEAN QFF PRESSURE IN HPA 1024.2 1019.2 ****** ****** ****** ****** ****** ****** ****** 1018.0 1021.1 ****** ****** MAX. QFF PRESSURE IN HPA 1037.5 1029.0 ****** ****** ****** ****** ****** ****** ****** 1028.4 1027.2 ****** ****** DAY 10 4 ** ** ** ** ** ** ** 2 24 ** MIN. QFF PRESSURE IN HPA 1009.2 1008.0 ****** ****** ****** ****** ****** ****** ****** 1009.2 1016.8 ****** ****** DAY 7 10 ** ** ** ** ** ** ** 6 3 ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 872.9 870.0 868.6 870.4 871.0 868.5 868.6 869.4 868.5 872.8 876.2 873.4 870.9 MAX. QFE PRESSURE IN HPA 881.7 875.7 872.5 876.8 875.6 872.4 875.3 877.2 875.0 882.1 884.8 880.5 884.8 DAY 10 13 12 4 4 11 3 29 25 2 18 8 MIN. QFE PRESSURE IN HPA 866.4 858.9 859.5 862.0 867.2 862.6 864.3 863.3 862.7 862.6 870.2 866.3 858.9 DAY 7 5 26 10 29 6 6 8 9 27 29 25 MEAN QNH PRESSURE IN HPA 1018.7 1015.3 1013.7 1015.8 1016.5 1013.6 1013.8 1014.7 1013.7 1018.5 1022.4 1019.2 1016.3 MAX. QNH PRESSURE IN HPA 1028.6 1021.8 1018.2 1023.1 1021.7 1018.1 1021.4 1023.5 1021.0 1029.1 1032.1 1027.3 1032.1 DAY 10 13 12 4 4 11 3 29 25 2 18 8 MIN. QNH PRESSURE IN HPA 1011.3 1002.8 1003.4 1006.3 1012.2 1007.0 1008.9 1007.8 1007.1 1007.0 1015.6 1011.2 1002.8 DAY 7 5 26 10 29 6 6 8 9 27 29 25 MEAN QFF PRESSURE IN HPA 1021.5 1017.7 ****** ****** ****** ****** ****** ****** ****** 1015.3 1018.5 ****** ****** MAX. QFF PRESSURE IN HPA 1035.2 1027.0 ****** ****** ****** ****** ****** ****** ****** 1025.7 1024.8 ****** ****** DAY 10 4 ** ** ** ** ** ** ** 2 24 ** MIN. QFF PRESSURE IN HPA 1008.0 1007.0 ****** ****** ****** ****** ****** ****** ****** 1006.7 1014.7 ****** ****** DAY 7 10 ** ** ** ** ** ** ** 14 6 ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 872.3 869.2 867.8 869.6 870.2 867.5 868.0 868.5 867.4 872.0 875.5 872.8 870.1 MAX. QFE PRESSURE IN HPA 881.2 874.8 871.4 876.2 874.4 872.0 874.8 876.7 873.6 881.7 884.5 879.7 884.5 DAY 10 13 12 4 4 11 3 29 25 2 18 7 MIN. QFE PRESSURE IN HPA 866.1 857.5 861.5 860.9 866.0 861.4 863.4 862.6 861.4 862.2 869.6 867.0 857.5 DAY 19 5 26 10 29 6 6 8 22 27 29 25 MEAN QNH PRESSURE IN HPA 1017.9 1014.5 1012.9 1014.9 1015.6 1012.6 1013.0 1013.7 1012.4 1017.7 1021.6 1018.5 1015.4 MAX. QNH PRESSURE IN HPA 1028.0 1020.8 1016.9 1022.4 1020.3 1017.6 1020.8 1022.9 1019.4 1028.6 1031.8 1026.4 1031.8 DAY 10 13 12 4 4 11 3 29 25 2 18 7 MIN. QNH PRESSURE IN HPA 1010.9 1001.2 1005.7 1005.0 1010.8 1005.6 1007.9 1007.0 1005.6 1006.5 1014.9 1012.0 1001.2 DAY 19 5 26 10 29 6 6 8 22 27 29 25 MEAN QFF PRESSURE IN HPA 1020.7 1016.9 ****** ****** ****** ****** ****** ****** ****** 1014.7 1017.8 ****** ****** MAX. QFF PRESSURE IN HPA 1034.4 1026.2 ****** ****** ****** ****** ****** ****** ****** 1026.1 1024.0 ****** ****** DAY 10 3 ** ** ** ** ** ** ** 2 24 ** MIN. QFF PRESSURE IN HPA 1009.7 1005.3 ****** ****** ****** ****** ****** ****** ****** 1004.0 1013.8 ****** ****** DAY 7 5 ** ** ** ** ** ** ** 14 6 ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 873.2 870.2 868.4 870.4 870.6 868.0 868.4 869.0 868.2 873.0 876.4 873.7 870.8 MAX. QFE PRESSURE IN HPA 881.6 875.4 872.0 877.5 874.6 873.1 875.0 877.0 874.5 881.9 885.5 880.4 885.5 DAY 10 13 28 4 7 11 3 29 30 2 18 7 MIN. QFE PRESSURE IN HPA 866.3 857.7 863.5 863.5 865.8 862.7 863.8 863.6 862.8 864.0 870.6 866.6 857.7 DAY 6 5 26 18 29 5 6 8 8 27 28 24 MEAN QNH PRESSURE IN HPA 1018.9 1015.6 1013.6 1015.8 1016.0 1013.0 1013.5 1014.2 1013.3 1018.7 1022.6 1019.6 1016.2 MAX. QNH PRESSURE IN HPA 1028.5 1021.5 1017.6 1023.9 1020.6 1018.9 1021.0 1023.3 1020.5 1028.8 1032.9 1027.1 1032.9 DAY 10 13 28 4 7 11 3 29 30 2 18 7 MIN. QNH PRESSURE IN HPA 1011.2 1001.4 1008.0 1008.0 1010.6 1007.1 1008.3 1008.1 1007.2 1008.6 1016.0 1011.5 1001.4 DAY 6 5 26 18 29 5 6 8 8 27 28 24 MEAN QFF PRESSURE IN HPA 1024.3 1019.2 1014.8 1013.9 1010.4 1005.0 1004.4 1006.4 1006.4 1016.4 1024.3 1022.1 1014.0 MAX. QFF PRESSURE IN HPA 1036.6 1028.3 1022.0 1027.0 1017.2 1012.7 1012.2 1017.5 1015.1 1028.3 1037.2 1033.3 1037.2 DAY 10 3 20 4 3 11 3 29 24 2 18 7 MIN. QFF PRESSURE IN HPA 1010.6 1005.0 1006.7 1002.4 1003.7 996.7 999.0 999.4 997.6 1005.2 1016.3 1013.0 996.7 DAY 6 5 25 13 29 5 6 8 8 27 6 24 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 873.7 870.5 ****** ****** ****** ****** ****** ****** ****** 874.7 874.4 ****** ****** MAX. QFE PRESSURE IN HPA 882.3 875.4 ****** ****** ****** ****** ****** ****** ****** 883.0 878.0 ****** ****** DAY 10 3 ** ** ** ** ** ** ** 2 24 ** MIN. QFE PRESSURE IN HPA 865.5 858.5 ****** ****** ****** ****** ****** ****** ****** 869.5 870.7 ****** ****** DAY 6 5 ** ** ** ** ** ** ** 5 28 ** MEAN QNH PRESSURE IN HPA 1019.5 1015.9 ****** ****** ****** ****** ****** ****** ****** 1020.7 1020.4 ****** ****** MAX. QNH PRESSURE IN HPA 1029.3 1021.5 ****** ****** ****** ****** ****** ****** ****** 1030.1 1024.4 ****** ****** DAY 10 3 ** ** ** ** ** ** ** 2 24 ** MIN. QNH PRESSURE IN HPA 1010.3 1002.3 ****** ****** ****** ****** ****** ****** ****** 1014.8 1016.1 ****** ****** DAY 6 5 ** ** ** ** ** ** ** 5 28 ** MEAN QFF PRESSURE IN HPA 1023.6 1019.0 ****** ****** ****** ****** ****** ****** ****** 1018.2 1020.5 ****** ****** MAX. QFF PRESSURE IN HPA 1037.4 1030.2 ****** ****** ****** ****** ****** ****** ****** 1029.4 1025.6 ****** ****** DAY 10 3 ** ** ** ** ** ** ** 2 24 ** MIN. QFF PRESSURE IN HPA 1008.5 1006.0 ****** ****** ****** ****** ****** ****** ****** 1010.4 1016.2 ****** ****** DAY 6 5 ** ** ** ** ** ** ** 5 6 ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 873.3 870.0 ****** ****** ****** ****** ****** ****** ****** 874.5 874.3 ****** ****** MAX. QFE PRESSURE IN HPA 881.9 875.0 ****** ****** ****** ****** ****** ****** ****** 882.0 877.7 ****** ****** DAY 9 3 ** ** ** ** ** ** ** 2 24 ** MIN. QFE PRESSURE IN HPA 863.5 859.2 ****** ****** ****** ****** ****** ****** ****** 869.5 870.7 ****** ****** DAY 6 5 ** ** ** ** ** ** ** 5 28 ** MEAN QNH PRESSURE IN HPA 1019.1 1015.4 ****** ****** ****** ****** ****** ****** ****** 1020.5 1020.2 ****** ****** MAX. QNH PRESSURE IN HPA 1028.8 1021.0 ****** ****** ****** ****** ****** ****** ****** 1029.0 1024.1 ****** ****** DAY 9 3 ** ** ** ** ** ** ** 2 24 ** MIN. QNH PRESSURE IN HPA 1008.0 1003.1 ****** ****** ****** ****** ****** ****** ****** 1014.8 1016.1 ****** ****** DAY 6 5 ** ** ** ** ** ** ** 5 28 ** MEAN QFF PRESSURE IN HPA 1022.1 1018.0 ****** ****** ****** ****** ****** ****** ****** 1016.9 1019.2 ****** ****** MAX. QFF PRESSURE IN HPA 1035.9 1030.2 ****** ****** ****** ****** ****** ****** ****** 1027.7 1024.5 ****** ****** DAY 10 3 ** ** ** ** ** ** ** 2 24 ** MIN. QFF PRESSURE IN HPA 1003.6 1006.5 ****** ****** ****** ****** ****** ****** ****** 1008.8 1015.3 ****** ****** DAY 6 5 ** ** ** ** ** ** ** 14 28 ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1997 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 2.9 1.0 5.3 12.7 16.6 23.8 27.2 24.2 19.6 15.2 6.5 3.1 13.2 MINIMUN AIR TEMPERATURE (C) -2.7 -5.5 -0.3 6.8 9.9 15.1 17.7 15.8 11.7 8.2 1.8 -0.9 6.5 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 0 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 9 16 4 0 0 0 0 0 0 0 0 3 32 DAYS WITH FREEZING MIN.<= 0 25 23 20 1 0 0 0 0 0 0 9 21 99 TEMPERATURE RECORDS LOWEST(C) -14.6 -16.0 -9.4 -0.8 4.6 11.0 13.8 10.2 7.6 3.8 -3.8 -6.4 -16.0 DAY 30 2 9 12 7 5 1 27 18 21 26 29 MAXIMUM AIR TEMPERATURE (C) 7.2 6.1 9.7 19.9 23.4 29.7 33.3 32.3 28.1 23.0 12.1 8.3 19.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 3 18 28 25 13 2 0 0 89 DAYS WITH MAXIMUM TEMP. <= 0 2 3 0 0 0 0 0 0 0 0 0 0 5 TEMPERATURE RECORDS HIGHEST(C) 16.0 17.0 22.0 27.8 33.0 34.4 38.8 37.6 38.0 31.6 20.6 14.6 38.8 DAY 9 22 24 28 29 14 15 14 2 3 4 10 DIF. BETWEEN (MAX.-MIN.) (C) 9.9 11.6 10.0 13.1 13.5 14.6 15.6 16.5 16.4 14.8 10.3 9.2 12.9 MEAN DAILY TEMP. (MDT) (C) 2.3 0.3 4.7 13.3 16.7 22.4 25.5 24.0 19.9 15.6 7.0 3.7 12.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 5.8 53.2 139.4 100.1 25.2 1.0 0.0 0.0 324.7 HEATING DEG. DAYS(BASE 18 0C) 487.9 496.0 413.0 145.1 74.9 0.3 0.0 0.0 14.0 90.7 331.3 442.8 2496.0 DEWPOINT (MEAN C) -3.8 -4.4 -0.5 3.7 6.5 9.6 7.1 4.4 4.8 3.6 1.4 -1.5 2.6 MIXING RATIO (G/KG) 3.39 3.31 4.36 5.99 7.19 8.95 7.83 6.60 6.48 5.98 5.01 3.99 5.76 VAPOUR PRESSURE (HPA) 4.71 4.61 6.03 8.27 9.94 12.30 10.75 9.10 8.98 8.31 6.98 5.55 7.96 SATURATION DEF. (HPA) 3.21 2.46 3.46 7.47 10.19 18.37 26.52 22.64 15.29 10.02 3.20 2.35 10.43 RELATIVE HUMIDITY (MEAN %) 65 70 70 59 57 46 32 32 42 52 73 75 56 RELATIVE HUMIDITY (MAX. %) 84 86 90 81 80 70 56 51 64 74 90 91 76 RELATIVE HUMIDITY (MIN. %) 49 53 53 33 32 28 20 16 23 29 52 53 37 RELATIVE HUMIDITY (MEAN% 03UTC) 81 85 86 74 73 67 53 49 60 66 87 87 72 RELATIVE HUMIDITY (MEAN% 09UTC) 54 58 62 41 39 31 23 20 28 33 54 57 42 RELATIVE HUMIDITY (MEAN% 15UTC) 67 75 68 50 47 38 25 23 33 48 71 73 52 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 32.2 21.0 73.5 32.7 51.9 70.2 0.3 0.0 0.9 26.7 39.7 11.2 360.3 DAYS WITH PRECIPITATION >=10 1 0 4 1 0 4 0 0 0 0 1 0 11 DAYS WITH PRECIPITATION >= 5 3 2 6 2 4 4 0 0 0 4 2 0 27 DAYS WITH PRECIPITATION >= 1 4 4 10 5 11 9 0 0 0 6 4 4 57 DAYS WITH PRECIPITATION 9 9 13 12 12 11 2 0 1 8 9 10 96 GREATEST DAILY PRECIPITATION 13.0 7.3 18.2 16.0 9.0 18.0 0.3 0.0 0.9 7.0 22.9 4.3 22.9 DAY 28 1 14 29 5 20 4 ** 15 24 1 17 DAY WITH THUNDER STORM 0 0 0 2 6 5 0 0 0 1 0 0 14 DAYS WITH SNOW OR SLEET 5 5 8 1 0 0 0 0 0 0 0 6 25 DAYS WITH DUST 0 0 0 0 0 0 0 1 1 1 0 0 3 WIND DIRECTION (PREVAILING) 135 315 135 135 135 45 45 90 135 135 135 315 135 PREVAILING WIND SPEED(KNOTS) 5.3 6.3 6.4 5.4 4.8 5.9 6.2 6.5 5.6 5.6 5.6 5.5 5.5 PREVAILING WIND PERCENT 14.8 16.4 13.4 12.9 13.7 15.4 24.9 22.2 17.1 12.1 14.2 13.3 13.0 CALMS PERCENT OF WIND 56.1 51.4 51.3 52.9 58.9 48.5 27.1 50.8 49.6 60.1 60.4 61.3 53.1 NO. OF WIND OBSERVATION 155 140 187 240 248 169 181 248 240 248 240 248 2544 VECTOR WIND DIRECTION (MEAN) 231 261 201 181 190 65 69 76 107 174 198 271 100 VECTOR WIND MAGNITUDE(KNOTS) 0.5 0.5 0.8 0.5 0.3 1.0 2.5 2.5 1.3 0.5 0.2 0.1 0.5 WIND STEADINESES (MEAN %) 21.7 17.9 25.8 17.9 14.3 35.7 59.5 80.6 43.3 22.7 9.5 4.8 18.5 WIND SPEED (MEAN KNOTS) 2.3 2.8 3.1 2.8 2.1 2.8 4.2 3.1 3.0 2.2 2.1 2.1 2.7 FASTEST WIND DIRECTION 160 300 140 150 140 150 80 70 60 180 120 300 80 FASTEST WIND SPEED (KNOTS) 12 16 16 16 10 16 19 16 14 16 16 16 19 DAY 1 1 3 20 3 4 27 8 7 6 10 11 DAYS WITH SKY CLEAR (0-2)/8 11 13 5 8 16 15 30 31 26 17 10 12 194 DAYS WITH P.CLOUDY (3-6)/8 15 10 10 16 8 14 1 0 4 12 12 9 111 DAYS WITH CLOUDY (7-8)/8 5 5 16 6 7 1 0 0 0 2 8 10 60 DAYS WITH VISIBILITY =< 2 KM 4 1 10 1 2 0 0 0 1 0 4 3 26 DURATION OF SUNSHINE HOURS 166.8 183.9 149.4 230.5 277.5 302.5 372.9 367.8 301.7 245.0 163.4 143.1 2904.5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 870.2 870.9 866.8 868.0 870.9 867.7 866.1 868.7 871.9 872.6 874.3 871.4 870.0 MAX. QFE PRESSURE IN HPA 879.5 878.0 881.2 874.9 877.5 872.4 871.2 873.8 878.3 879.2 885.7 879.7 885.7 DAY-HOUR 24- 6 21- 6 11- 6 13-18 12- 6 8- 3 19- 6 24- 6 7- 6 8-18 7-18 28-18 MIN. QFE PRESSURE IN HPA 860.7 862.6 856.9 856.6 859.2 862.4 860.3 862.2 862.0 867.6 869.2 862.4 856.6 DAY-HOUR 17-12 22-12 25-21 10- 0 5- 0 23-12 16-12 5-15 2-12 23-12 5- 9 10-12 MEAN QNH PRESSURE IN HPA 1015.6 1016.4 1011.7 1013.0 1016.4 1012.7 1011.0 1013.9 1017.5 1018.3 1020.2 1017.0 1015.3 MAX. QNH PRESSURE IN HPA 1026.1 1024.4 1028.0 1020.9 1023.9 1018.1 1016.7 1019.7 1024.8 1025.8 1033.1 1026.4 1033.1 DAY-HOUR 24- 6 21- 6 11- 6 13-18 12- 6 8- 3 19- 6 24- 6 7- 6 8-18 7-18 28-18 MIN. QNH PRESSURE IN HPA 1004.8 1007.0 1000.5 1000.2 1003.1 1006.7 1004.4 1006.5 1006.3 1012.6 1014.4 1006.7 1000.2 DAY-HOUR 17-12 22-12 25-21 10- 0 5- 0 23-12 16-12 5-15 2-12 23-12 5- 9 10-12 MEAN QFF PRESSURE IN HPA ****** ****** 1011.0 1009.4 1010.7 ****** ****** 1004.4 1010.3 1013.4 1020.1 1018.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** 1031.2 1021.7 1020.6 ****** ****** 1011.4 1020.4 1022.3 1034.9 1031.3 ****** DAY-HOUR **-** **-** 11- 3 13-18 16- 3 **-** **-** 25- 3 7- 3 8- 6 7-18 28-18 MIN. QFF PRESSURE IN HPA ****** ****** 995.8 993.5 995.2 ****** ****** 995.8 994.8 1005.1 1008.9 1003.8 ****** DAY-HOUR **-** **-** 25-21 10- 0 5- 0 **-** **-** 14-12 2-12 7- 0 5- 9 10- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 867.8 870.6 ****** ****** 868.7 871.9 872.5 874.1 871.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 873.6 876.0 ****** ****** 871.9 876.8 878.0 884.1 878.6 ****** DAY ** ** ** 14 12 ** ** 24 7 9 8 29 MIN. QFE PRESSURE IN HPA ****** ****** ****** 856.6 859.2 ****** ****** 864.1 864.7 868.6 870.2 862.8 ****** DAY ** ** ** 10 5 ** ** 5 2 7 20 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** 1012.9 1016.1 ****** ****** 1013.9 1017.5 1018.2 1020.0 1016.6 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1019.4 1022.2 ****** ****** 1017.5 1023.1 1024.4 1031.3 1025.1 ****** DAY ** ** ** 14 12 ** ** 24 7 9 8 29 MIN. QNH PRESSURE IN HPA ****** ****** ****** 1000.2 1003.1 ****** ****** 1008.7 1009.3 1013.8 1015.6 1007.2 ****** DAY ** ** ** 10 5 ** ** 5 2 7 20 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1009.2 1010.4 ****** ****** 1004.3 1010.0 1013.0 1019.6 1018.1 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1019.3 1019.4 ****** ****** 1010.0 1018.0 1020.4 1033.2 1029.4 ****** DAY ** ** ** 14 16 ** ** 28 8 9 8 29 MIN. QFF PRESSURE IN HPA ****** ****** ****** 993.5 995.2 ****** ****** 997.8 997.7 1005.1 1010.3 1005.1 ****** DAY ** ** ** 10 5 ** ** 15 3 7 5 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 870.5 870.9 867.4 868.5 871.4 868.3 867.1 869.5 872.7 873.1 874.4 871.5 870.4 MAX. QFE PRESSURE IN HPA 878.8 876.7 880.7 873.9 877.1 872.4 871.0 873.4 877.8 878.3 884.3 878.1 884.3 DAY 24 26 11 14 12 8 19 24 7 9 7 29 MIN. QFE PRESSURE IN HPA 862.5 863.7 860.3 858.8 861.5 864.7 862.0 864.3 864.6 869.4 870.2 863.3 858.8 DAY 16 1 26 10 5 25 16 5 2 7 20 10 MEAN QNH PRESSURE IN HPA 1015.9 1016.4 1012.4 1013.6 1016.9 1013.4 1012.0 1014.8 1018.4 1018.8 1020.4 1017.0 1015.8 MAX. QNH PRESSURE IN HPA 1025.3 1022.9 1027.5 1019.8 1023.4 1018.1 1016.5 1019.2 1024.2 1024.8 1031.6 1024.5 1031.6 DAY 24 26 11 14 12 8 19 24 7 9 7 29 MIN. QNH PRESSURE IN HPA 1006.9 1008.2 1004.4 1002.7 1005.7 1009.3 1006.3 1008.9 1009.2 1014.7 1015.6 1007.8 1002.7 DAY 16 1 26 10 5 25 16 5 2 7 20 10 MEAN QFF PRESSURE IN HPA 1019.3 1021.2 1014.2 1010.7 1011.7 1004.8 1002.0 1006.0 1012.2 1015.0 1021.1 1019.6 1013.1 MAX. QFF PRESSURE IN HPA 1030.0 1031.5 1031.2 1021.1 1020.6 1011.1 1006.8 1011.4 1020.4 1021.8 1034.2 1030.5 1034.2 DAY 24 8 11 14 16 8 9 25 7 9 8 29 MIN. QFF PRESSURE IN HPA 1006.1 1008.3 1001.7 998.4 998.6 1000.5 995.3 999.9 998.9 1007.5 1011.7 1006.2 995.3 DAY 16 23 26 10 5 23 16 15 2 7 5 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.5 871.8 868.2 868.9 871.7 868.1 867.0 869.5 873.0 873.5 875.2 872.4 870.9 MAX. QFE PRESSURE IN HPA 879.5 878.0 881.2 874.4 877.5 871.8 871.2 873.8 878.3 879.0 885.5 878.9 885.5 DAY 24 21 11 14 12 8 19 24 7 8 7 28 MIN. QFE PRESSURE IN HPA 862.9 865.1 861.4 860.0 864.5 864.6 862.0 864.5 864.9 869.9 870.5 864.3 860.0 DAY 16 23 17 10 5 24 16 5 2 7 5 10 MEAN QNH PRESSURE IN HPA 1017.0 1017.4 1013.3 1014.1 1017.3 1013.2 1012.0 1014.8 1018.7 1019.3 1021.3 1018.1 1016.4 MAX. QNH PRESSURE IN HPA 1026.1 1024.4 1028.0 1020.3 1023.9 1017.4 1016.7 1019.7 1024.8 1025.6 1032.9 1025.4 1032.9 DAY 24 21 11 14 12 8 19 24 7 8 7 28 MIN. QNH PRESSURE IN HPA 1007.3 1009.8 1005.6 1004.0 1009.1 1009.2 1006.3 1009.1 1009.6 1015.2 1015.9 1008.9 1004.0 DAY 16 23 17 10 5 24 16 5 2 7 5 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1010.6 1011.6 ****** ****** 1005.1 1011.7 1014.3 1021.5 1020.2 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1021.4 1020.2 ****** ****** 1010.6 1020.1 1022.3 1034.8 1030.3 ****** DAY ** ** ** 13 16 ** ** 28 7 8 8 28 MIN. QFF PRESSURE IN HPA ****** ****** ****** 1000.3 1003.0 ****** ****** 998.7 997.7 1007.0 1011.5 1007.5 ****** DAY ** ** ** 10 5 ** ** 14 2 7 5 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 870.0 870.8 867.3 867.7 870.8 867.4 865.9 868.4 871.4 872.0 874.0 871.0 869.7 MAX. QFE PRESSURE IN HPA 878.0 877.4 880.5 873.5 876.8 871.2 870.4 872.6 876.5 877.9 884.2 877.8 884.2 DAY 19 21 11 20 12 6 19 24 7 8 7 28 MIN. QFE PRESSURE IN HPA 861.4 863.9 859.4 858.7 864.0 863.7 861.0 863.4 863.2 868.3 869.2 862.5 858.7 DAY 16 22 17 10 4 24 16 14 2 23 5 10 MEAN QNH PRESSURE IN HPA 1015.3 1016.3 1012.3 1012.7 1016.2 1012.4 1010.7 1013.5 1016.9 1017.6 1019.9 1016.5 1015.0 MAX. QNH PRESSURE IN HPA 1024.4 1023.7 1027.3 1019.3 1023.1 1016.7 1015.8 1018.3 1022.7 1024.3 1031.4 1024.2 1031.4 DAY 19 21 11 20 12 6 19 24 7 8 7 28 MIN. QNH PRESSURE IN HPA 1005.6 1008.4 1003.3 1002.5 1008.6 1008.2 1005.2 1007.9 1007.6 1013.4 1014.4 1006.9 1002.5 DAY 16 22 17 10 4 24 16 14 2 23 5 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1008.7 1010.3 ****** ****** 1003.5 1009.1 1012.1 1019.3 1017.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1019.6 1018.7 ****** ****** 1009.9 1017.1 1019.9 1033.2 1028.4 ****** DAY ** ** ** 13 16 ** ** 28 8 8 8 28 MIN. QFF PRESSURE IN HPA ****** ****** ****** 998.2 1000.9 ****** ****** 996.9 995.5 1005.4 1008.9 1003.8 ****** DAY ** ** ** 10 4 ** ** 14 2 3 5 10 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 869.3 870.0 866.4 866.8 870.0 866.7 865.0 867.5 870.3 871.3 873.4 870.6 868.9 MAX. QFE PRESSURE IN HPA 877.5 876.5 878.7 872.9 875.5 870.0 869.5 871.9 875.7 877.2 883.9 878.0 883.9 DAY 19 21 11 13 12 8 19 24 7 8 7 28 MIN. QFE PRESSURE IN HPA 860.7 862.6 858.2 858.7 861.7 862.4 860.3 862.4 862.0 867.6 869.2 862.4 858.2 DAY 17 22 17 10 4 23 16 14 2 23 5 10 MEAN QNH PRESSURE IN HPA 1014.6 1015.4 1011.3 1011.7 1015.4 1011.6 1009.7 1012.6 1015.7 1016.8 1019.2 1016.1 1014.2 MAX. QNH PRESSURE IN HPA 1023.9 1022.7 1025.2 1018.6 1021.6 1015.4 1014.8 1017.5 1021.8 1023.5 1031.1 1024.4 1031.1 DAY 19 21 11 13 12 8 19 24 7 8 7 28 MIN. QNH PRESSURE IN HPA 1004.8 1007.0 1002.0 1002.5 1005.9 1006.7 1004.4 1006.7 1006.3 1012.6 1014.4 1006.7 1002.0 DAY 17 22 17 10 4 23 16 14 2 23 5 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1007.9 1009.7 ****** ****** 1003.0 1008.2 1011.6 1018.7 1017.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1018.6 1017.8 ****** ****** 1010.0 1016.2 1019.4 1032.4 1028.2 ****** DAY ** ** ** 13 15 ** ** 28 7 8 7 28 MIN. QFF PRESSURE IN HPA ****** ****** ****** 998.5 998.2 ****** ****** 995.8 994.8 1005.5 1009.0 1004.3 ****** DAY ** ** ** 5 4 ** ** 14 2 1 5 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 870.0 871.1 867.2 867.2 870.4 867.0 865.3 867.9 871.1 872.4 874.2 871.5 869.6 MAX. QFE PRESSURE IN HPA 878.1 876.5 879.1 873.9 875.4 870.2 869.7 871.9 876.2 878.4 884.7 879.3 884.7 DAY 23 21 11 13 12 7 19 24 7 8 7 28 MIN. QFE PRESSURE IN HPA 861.3 863.8 858.9 859.9 860.7 862.9 861.0 862.2 862.8 868.6 870.2 863.4 858.9 DAY 17 22 25 5 4 23 16 5 2 6 19 10 MEAN QNH PRESSURE IN HPA 1015.4 1016.6 1012.2 1012.2 1015.8 1012.0 1010.0 1013.0 1016.6 1018.0 1020.1 1017.1 1014.9 MAX. QNH PRESSURE IN HPA 1024.5 1022.7 1025.7 1019.8 1021.5 1015.6 1015.0 1017.5 1022.4 1024.9 1032.0 1025.9 1032.0 DAY 23 21 11 13 12 7 19 24 7 8 7 28 MIN. QNH PRESSURE IN HPA 1005.5 1008.3 1002.8 1003.9 1004.8 1007.3 1005.2 1006.5 1007.2 1013.8 1015.6 1007.9 1002.8 DAY 17 22 25 5 4 23 16 5 2 6 19 10 MEAN QFF PRESSURE IN HPA 1018.8 1021.4 1013.9 1009.1 1010.5 1003.5 1000.0 1004.3 1010.4 1014.2 1020.8 1019.6 1012.2 MAX. QFF PRESSURE IN HPA 1029.3 1030.8 1028.8 1020.8 1018.4 1009.2 1004.7 1010.3 1018.4 1022.1 1034.5 1031.0 1034.5 DAY 19 7 10 13 6 4 19 28 7 8 7 28 MIN. QFF PRESSURE IN HPA 1004.9 1009.0 999.7 999.3 997.7 998.1 994.6 997.0 996.7 1007.6 1011.5 1006.0 994.6 DAY 16 22 25 5 4 23 16 5 2 6 5 10 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 868.6 871.6 ****** ****** 869.3 872.5 873.3 874.6 871.8 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 874.9 876.0 ****** ****** 873.0 877.4 879.2 885.7 879.7 ****** DAY ** ** ** 13 15 ** ** 24 7 8 7 28 MIN. QFE PRESSURE IN HPA ****** ****** ****** 860.7 860.7 ****** ****** 863.7 865.4 869.3 870.4 863.4 ****** DAY ** ** ** 9 4 ** ** 5 2 6 19 10 MEAN QNH PRESSURE IN HPA ****** ****** ****** 1013.8 1017.1 ****** ****** 1014.5 1018.2 1019.1 1020.6 1017.4 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1020.9 1022.2 ****** ****** 1018.8 1023.7 1025.8 1033.1 1026.4 ****** DAY ** ** ** 13 15 ** ** 24 7 8 7 28 MIN. QNH PRESSURE IN HPA ****** ****** ****** 1004.8 1004.8 ****** ****** 1008.2 1010.1 1014.6 1015.8 1007.9 ****** DAY ** ** ** 9 4 ** ** 5 2 6 19 10 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1010.2 1011.4 ****** ****** 1004.9 1011.2 1014.1 1020.8 1019.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1021.7 1019.8 ****** ****** 1010.3 1019.1 1022.3 1034.9 1031.3 ****** DAY ** ** ** 13 6 ** ** 24 7 8 7 28 MIN. QFF PRESSURE IN HPA ****** ****** ****** 1000.5 997.2 ****** ****** 998.2 998.6 1007.0 1013.3 1006.4 ****** DAY ** ** ** 9 4 ** ** 5 2 6 5 10 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** 868.3 871.0 ****** ****** 868.9 872.3 873.0 874.3 871.5 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** 874.4 876.0 ****** ****** 872.0 876.9 878.6 884.9 879.3 ****** DAY ** ** ** 13 15 ** ** 16 7 8 7 28 MIN. QFE PRESSURE IN HPA ****** ****** ****** 858.5 860.3 ****** ****** 864.0 864.9 868.8 870.2 863.0 ****** DAY ** ** ** 9 4 ** ** 5 2 6 19 9 MEAN QNH PRESSURE IN HPA ****** ****** ****** 1013.5 1016.5 ****** ****** 1014.2 1017.9 1018.7 1020.2 1017.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** 1020.3 1022.2 ****** ****** 1017.6 1023.2 1025.1 1032.2 1025.9 ****** DAY ** ** ** 13 15 ** ** 16 7 8 7 28 MIN. QNH PRESSURE IN HPA ****** ****** ****** 1002.3 1004.4 ****** ****** 1008.6 1009.6 1014.0 1015.6 1007.4 ****** DAY ** ** ** 9 4 ** ** 5 2 6 19 9 MEAN QFF PRESSURE IN HPA ****** ****** ****** 1009.3 1010.4 ****** ****** 1004.1 1010.1 1013.3 1019.6 1018.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** 1020.7 1019.1 ****** ****** 1008.9 1017.7 1020.9 1033.8 1030.8 ****** DAY ** ** ** 12 6 ** ** 28 7 8 7 28 MIN. QFF PRESSURE IN HPA ****** ****** ****** 997.2 996.2 ****** ****** 997.9 997.4 1006.3 1011.1 1004.7 ****** DAY ** ** ** 9 4 ** ** 5 2 6 4 9 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1998 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.1 -0.9 5.7 14.4 16.7 22.7 25.0 23.8 19.5 13.6 9.6 6.2 12.9 MINIMUN AIR TEMPERATURE (C) -4.8 -5.0 0.3 8.3 10.4 14.7 17.8 16.9 11.7 6.4 3.9 1.2 6.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 4 0 0 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 17 19 7 0 0 0 0 0 0 0 0 0 43 DAYS WITH FREEZING MIN.<= 0 29 25 11 0 0 0 0 0 0 2 1 8 76 TEMPERATURE RECORDS LOWEST(C) -13.4 -13.0 -14.6 2.2 3.0 10.6 14.0 13.4 6.2 -1.0 -0.6 -3.0 -14.6 DAY 11 18 3 2 4 12 25 31 13 10 27 23 MAXIMUM AIR TEMPERATURE (C) 3.2 4.3 12.0 21.2 23.7 29.6 32.1 31.1 27.7 21.9 16.9 12.9 19.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 2 12 25 23 9 2 0 0 74 DAYS WITH MAXIMUM TEMP. <= 0 5 9 3 0 0 0 0 0 0 0 0 0 17 TEMPERATURE RECORDS HIGHEST(C) 10.2 16.4 23.0 30.8 31.4 37.0 36.8 35.0 34.0 30.4 25.4 25.2 37.0 DAY 1 8 29 18 21 28 6 27 2 1 1 11 DIF. BETWEEN (MAX.-MIN.) (C) 8.0 9.3 11.7 12.9 13.3 14.9 14.3 14.2 16.0 15.5 13.0 11.7 12.9 MEAN DAILY TEMP. (MDT) (C) -0.8 -0.4 6.2 14.7 17.1 22.2 24.9 24.0 19.7 14.2 10.4 7.0 13.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.9 5.5 43.8 122.8 92.7 23.1 2.1 0.0 0.0 291.9 HEATING DEG. DAYS(BASE 18 0C) 583.0 514.7 367.3 113.7 59.8 0.0 0.0 0.0 14.9 128.1 228.9 340.5 2350.9 DEWPOINT (MEAN C) -4.1 -4.3 -0.4 5.4 7.1 7.1 9.0 8.8 4.5 2.2 1.5 0.3 3.1 MIXING RATIO (G/KG) 3.33 3.32 4.49 6.66 7.59 7.58 8.65 8.58 6.54 5.44 4.97 4.52 5.97 VAPOUR PRESSURE (HPA) 4.63 4.62 6.22 9.20 10.48 10.47 11.88 11.82 9.05 7.57 6.93 6.32 8.27 SATURATION DEF. (HPA) 1.23 1.55 3.91 8.50 9.60 18.24 21.06 18.70 15.05 9.27 5.62 3.65 9.70 RELATIVE HUMIDITY (MEAN %) 81 80 69 60 57 41 40 43 42 51 61 70 58 RELATIVE HUMIDITY (MAX. %) 93 92 89 83 77 65 63 65 63 74 80 88 78 RELATIVE HUMIDITY (MIN. %) 64 65 45 36 38 23 24 25 23 29 39 48 38 RELATIVE HUMIDITY (MEAN% 03UTC) 88 88 84 77 72 60 58 61 59 70 77 84 73 RELATIVE HUMIDITY (MEAN% 09UTC) 70 70 54 43 43 26 27 29 27 34 44 53 43 RELATIVE HUMIDITY (MEAN% 15UTC) 81 79 61 49 47 27 29 31 33 44 56 67 50 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 56.4 95.4 44.9 77.4 58.9 5.4 2.2 1.5 1.3 13.0 0.0 17.0 373.4 DAYS WITH PRECIPITATION >=10 1 5 1 3 3 0 0 0 0 0 0 1 14 DAYS WITH PRECIPITATION >= 5 4 6 4 4 4 0 0 0 0 1 0 1 24 DAYS WITH PRECIPITATION >= 1 11 11 7 7 6 1 1 0 1 3 0 2 50 DAYS WITH PRECIPITATION 17 13 9 9 13 3 3 3 1 5 0 4 80 GREATEST DAILY PRECIPITATION 14.0 22.0 13.0 25.7 17.3 4.0 2.0 0.9 1.3 9.0 0.0 12.0 25.7 DAY 10 9 2 6 30 4 24 2 11 25 ** 2 DAY WITH THUNDER STORM 0 0 1 3 5 0 1 0 0 2 0 0 12 DAYS WITH SNOW OR SLEET 16 14 6 0 0 0 0 0 0 0 0 2 38 DAYS WITH DUST 0 0 0 0 1 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 135 315 135 135 135 45 45 315 135 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 6.2 6.0 5.6 6.0 5.8 6.6 6.9 5.0 5.4 5.3 5.5 5.8 5.7 PREVAILING WIND PERCENT 12.9 17.9 23.4 15.0 16.1 18.3 19.0 18.1 15.0 18.5 27.5 27.8 16.1 CALMS PERCENT OF WIND 60.1 45.5 42.3 51.7 41.1 45.4 36.7 40.3 47.5 51.6 54.2 45.6 46.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 210 221 204 159 140 54 49 39 119 141 137 144 104 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.5 0.8 0.3 0.6 1.7 1.7 1.2 0.9 0.5 1.3 1.0 0.5 WIND STEADINESES (MEAN %) 8.7 15.6 23.5 10.7 18.2 51.5 43.6 37.5 32.1 18.5 54.2 34.5 16.7 WIND SPEED (MEAN KNOTS) 2.3 3.2 3.4 2.8 3.3 3.3 3.9 3.2 2.8 2.7 2.4 2.9 3.0 FASTEST WIND DIRECTION 310 150 300 150 240 80 60 90 60 310 150 140 300 FASTEST WIND SPEED (KNOTS) 16 17 27 16 17 14 16 17 10 14 10 12 27 DAY 14 16 26 28 14 30 7 30 1 2 10 30 DAYS WITH SKY CLEAR (0-2)/8 6 7 9 11 9 28 25 22 25 21 14 10 187 DAYS WITH P.CLOUDY (3-6)/8 10 7 13 13 17 2 6 9 5 9 14 13 118 DAYS WITH CLOUDY (7-8)/8 15 14 9 6 5 0 0 0 0 1 2 8 60 DAYS WITH VISIBILITY =< 2 KM 9 10 10 2 2 0 0 0 0 2 0 4 39 DURATION OF SUNSHINE HOURS 96.1 130.3 189.3 223.0 263.4 361.7 348.8 330.3 300.5 272.1 199.2 136.9 2851.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 869.4 870.4 868.7 869.4 870.8 870.4 867.1 869.9 871.0 874.3 874.4 875.4 870.9 MAX. QFE PRESSURE IN HPA 878.0 882.9 879.4 880.4 878.1 875.1 872.6 873.9 876.7 883.7 882.8 883.5 883.7 DAY-HOUR 4- 6 23- 6 26-18 12- 6 8-18 5- 6 15- 6 25- 6 12-18 9-18 21- 6 29-18 MIN. QFE PRESSURE IN HPA 853.9 856.2 855.9 861.8 860.7 866.1 858.0 866.0 865.0 865.7 867.4 865.4 853.9 DAY-HOUR 13-15 14- 0 18-21 21-15 22- 9 24-15 5-15 22-12 6-12 1-12 1-12 21- 9 MEAN QNH PRESSURE IN HPA 1014.6 1015.8 1013.9 1014.7 1016.3 1015.8 1012.0 1015.3 1016.5 1020.2 1020.3 1021.5 1016.4 MAX. QNH PRESSURE IN HPA 1024.4 1030.0 1026.0 1027.1 1024.5 1021.1 1018.3 1019.8 1022.9 1030.9 1029.9 1030.7 1030.9 DAY-HOUR 4- 6 23- 6 26-18 12- 6 8-18 5- 6 15- 6 25- 6 12-18 9-18 21- 6 29-18 MIN. QNH PRESSURE IN HPA 997.1 999.7 999.4 1006.1 1004.8 1010.9 1001.8 1010.8 1009.7 1010.5 1012.4 1010.1 997.1 DAY-HOUR 13-15 14- 0 18-21 21-15 22- 9 24-15 5-15 22-12 6-12 1-12 1-12 21- 9 MEAN QFF PRESSURE IN HPA 1018.9 1020.0 1014.3 1010.2 1010.5 1007.1 1001.9 1005.8 1009.4 1016.3 1018.5 1021.8 1012.9 MAX. QFF PRESSURE IN HPA 1029.6 1037.8 1028.0 1023.2 1023.7 1012.9 1009.5 1011.4 1020.2 1032.7 1028.6 1032.6 1037.8 DAY-HOUR 4- 6 23- 3 26-18 12- 6 3- 6 6- 3 15- 6 25- 3 13- 3 10- 3 21- 6 29-18 MIN. QFF PRESSURE IN HPA 1000.5 999.8 993.1 998.4 994.8 999.6 988.8 1000.6 999.6 1002.1 1006.5 1008.4 988.8 DAY-HOUR 13-15 8-12 18-21 21- 9 22- 9 28-15 5-21 22-12 6- 9 1-12 1-12 21- 9 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 869.1 870.0 868.2 869.4 870.7 870.3 867.0 869.8 871.2 874.3 874.3 875.7 870.8 MAX. QFE PRESSURE IN HPA 877.4 882.0 876.8 878.3 876.9 873.9 871.7 872.9 876.7 882.7 882.3 881.1 882.7 DAY 4 23 27 12 9 6 20 19 27 10 21 30 MIN. QFE PRESSURE IN HPA 857.0 856.2 856.0 862.5 861.6 867.0 858.2 867.1 866.7 866.6 869.4 866.9 856.0 DAY 14 14 19 22 22 1 6 13 6 2 9 21 MEAN QNH PRESSURE IN HPA 1014.3 1015.4 1013.3 1014.6 1016.1 1015.7 1012.0 1015.1 1016.7 1020.2 1020.2 1021.8 1016.3 MAX. QNH PRESSURE IN HPA 1023.7 1029.0 1023.1 1024.8 1023.2 1019.8 1017.3 1018.6 1022.9 1029.7 1029.3 1027.9 1029.7 DAY 4 23 27 12 9 6 20 19 27 10 21 30 MIN. QNH PRESSURE IN HPA 1000.6 999.7 999.5 1006.9 1005.8 1012.0 1002.0 1012.1 1011.6 1011.5 1014.7 1011.8 999.5 DAY 14 14 19 22 22 1 6 13 6 2 9 21 MEAN QFF PRESSURE IN HPA 1018.1 1019.2 1013.5 1009.9 1010.1 1007.2 1001.9 1005.4 1009.3 1015.8 1017.7 1021.4 1012.5 MAX. QFF PRESSURE IN HPA 1029.1 1035.7 1023.7 1019.9 1022.0 1012.0 1007.9 1009.0 1018.6 1030.1 1027.0 1029.6 1035.7 DAY 4 23 27 12 3 6 20 9 13 10 21 30 MIN. QFF PRESSURE IN HPA 1004.7 1003.9 994.1 999.0 996.1 1000.3 989.4 1002.1 1001.4 1003.0 1009.0 1012.2 989.4 DAY 14 8 19 21 22 29 6 18 6 2 1 21 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 869.2 870.2 868.9 869.7 871.3 871.0 867.8 870.6 871.8 874.8 874.7 875.8 871.3 MAX. QFE PRESSURE IN HPA 877.2 882.4 876.4 878.8 877.5 874.8 872.6 873.8 876.4 882.7 882.0 881.1 882.7 DAY 4 23 27 12 9 6 20 25 13 10 21 29 MIN. QFE PRESSURE IN HPA 859.8 856.9 857.7 863.2 861.4 867.8 858.9 867.4 867.0 866.8 870.0 866.4 856.9 DAY 13 14 19 21 22 24 6 13 6 2 9 21 MEAN QNH PRESSURE IN HPA 1014.4 1015.5 1014.1 1015.0 1016.8 1016.5 1012.9 1016.1 1017.3 1020.8 1020.7 1021.9 1016.8 MAX. QNH PRESSURE IN HPA 1023.5 1029.4 1022.6 1025.3 1023.9 1020.8 1018.3 1019.7 1022.6 1029.7 1029.0 1027.9 1029.7 DAY 4 23 27 12 9 6 20 25 13 10 21 29 MIN. QNH PRESSURE IN HPA 1003.8 1000.5 1001.4 1007.6 1005.6 1012.9 1002.8 1012.4 1012.0 1011.7 1015.4 1011.3 1000.5 DAY 13 14 19 21 22 24 6 13 6 2 9 21 MEAN QFF PRESSURE IN HPA 1019.3 1020.3 1015.1 1011.1 1011.5 1008.0 1003.2 1007.2 1011.2 1017.9 1019.8 1022.9 1013.9 MAX. QFF PRESSURE IN HPA 1029.3 1037.8 1025.3 1022.2 1023.5 1012.9 1009.1 1011.4 1020.2 1032.7 1028.2 1029.4 1037.8 DAY 4 23 4 12 3 6 20 25 13 10 21 29 MIN. QFF PRESSURE IN HPA 1006.8 1002.5 996.4 1000.4 996.1 1002.6 990.7 1003.1 1002.9 1004.3 1011.0 1013.2 990.7 DAY 6 8 30 21 22 28 6 13 6 2 1 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 870.1 871.2 869.6 870.3 871.4 871.0 867.8 870.8 872.1 875.3 875.4 876.6 871.8 MAX. QFE PRESSURE IN HPA 878.0 882.9 878.5 880.4 877.7 875.1 872.6 873.9 876.7 883.1 882.8 883.2 883.2 DAY 4 23 26 12 3 5 15 25 27 10 21 29 MIN. QFE PRESSURE IN HPA 859.3 859.0 857.5 863.9 861.2 867.7 860.0 867.2 867.6 867.2 870.7 867.1 857.5 DAY 13 14 30 21 22 24 6 13 6 2 1 21 MEAN QNH PRESSURE IN HPA 1015.4 1016.7 1014.9 1015.7 1016.9 1016.5 1012.8 1016.3 1017.8 1021.4 1021.5 1022.8 1017.4 MAX. QNH PRESSURE IN HPA 1024.4 1030.0 1025.0 1027.1 1024.1 1021.1 1018.3 1019.8 1022.9 1030.2 1029.9 1030.3 1030.3 DAY 4 23 26 12 3 5 15 25 27 10 21 29 MIN. QNH PRESSURE IN HPA 1003.2 1002.9 1001.2 1008.4 1005.4 1012.8 1004.0 1012.2 1012.6 1012.2 1016.1 1012.1 1001.2 DAY 13 14 30 21 22 24 6 13 6 2 1 21 MEAN QFF PRESSURE IN HPA 1020.0 1021.1 1015.7 1011.4 1011.2 1007.5 1002.7 1006.7 1010.6 1017.7 1020.1 1023.7 1014.0 MAX. QFF PRESSURE IN HPA 1029.6 1037.5 1025.5 1023.2 1023.7 1012.4 1009.5 1010.3 1018.6 1032.2 1028.6 1032.0 1037.5 DAY 4 23 4 12 3 5 15 25 13 10 21 29 MIN. QFF PRESSURE IN HPA 1005.8 1002.8 994.5 1000.4 995.7 1001.6 991.2 1001.4 1003.0 1003.0 1011.9 1012.2 991.2 DAY 6 8 30 21 22 28 6 13 6 2 1 21 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 869.2 870.3 868.9 869.4 870.6 870.4 866.9 869.8 870.7 873.9 874.0 875.0 870.8 MAX. QFE PRESSURE IN HPA 877.3 881.5 878.9 879.4 877.1 874.9 871.5 872.8 875.7 882.4 881.2 882.3 882.4 DAY 4 23 26 12 3 6 15 19 27 9 21 29 MIN. QFE PRESSURE IN HPA 856.6 858.8 858.5 862.8 860.7 867.1 860.2 866.8 865.5 866.8 868.8 865.4 856.6 DAY 13 14 30 21 22 24 6 13 6 2 1 21 MEAN QNH PRESSURE IN HPA 1014.5 1015.7 1014.1 1014.7 1016.1 1015.8 1011.8 1015.1 1016.1 1019.8 1019.9 1021.0 1016.2 MAX. QNH PRESSURE IN HPA 1023.6 1028.4 1025.4 1026.0 1023.4 1020.9 1017.1 1018.5 1021.8 1029.4 1028.0 1029.3 1029.4 DAY 4 23 26 12 3 6 15 19 27 9 21 29 MIN. QNH PRESSURE IN HPA 1000.2 1002.7 1002.3 1007.2 1004.8 1012.1 1004.2 1011.7 1010.3 1011.7 1014.0 1010.1 1000.2 DAY 13 14 30 21 22 24 6 13 6 2 1 21 MEAN QFF PRESSURE IN HPA 1018.3 1019.5 1014.2 1009.7 1010.0 1006.8 1001.4 1005.2 1008.4 1015.2 1017.4 1020.7 1012.2 MAX. QFF PRESSURE IN HPA 1028.5 1034.9 1026.2 1021.4 1021.9 1012.4 1007.5 1009.3 1016.7 1028.7 1026.0 1031.1 1034.9 DAY 4 23 26 12 3 6 15 25 12 10 21 29 MIN. QFF PRESSURE IN HPA 1003.2 1001.4 996.6 998.4 994.8 1001.2 991.0 1000.9 999.6 1003.1 1008.0 1008.4 991.0 DAY 13 8 30 21 22 28 6 13 6 2 1 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 868.8 869.7 868.0 868.3 869.8 869.6 866.1 868.8 869.6 872.9 873.2 874.2 869.9 MAX. QFE PRESSURE IN HPA 876.4 880.2 878.0 877.6 876.1 874.2 871.0 872.3 875.5 881.3 879.6 882.0 882.0 DAY 22 23 26 12 3 5 19 25 27 9 21 29 MIN. QFE PRESSURE IN HPA 854.6 858.0 860.5 862.2 861.6 866.3 858.6 866.0 865.0 865.7 867.4 866.7 854.6 DAY 13 13 15 21 22 24 5 22 6 1 1 21 MEAN QNH PRESSURE IN HPA 1014.0 1015.1 1013.1 1013.4 1015.1 1014.9 1011.0 1014.0 1015.0 1018.7 1019.0 1020.1 1015.3 MAX. QNH PRESSURE IN HPA 1022.6 1026.9 1024.4 1024.0 1022.3 1020.1 1016.5 1018.0 1021.6 1028.2 1026.2 1029.0 1029.0 DAY 22 23 26 12 3 5 19 25 27 9 21 29 MIN. QNH PRESSURE IN HPA 997.9 1001.8 1004.6 1006.5 1005.8 1011.2 1002.4 1010.8 1009.7 1010.5 1012.4 1011.6 997.9 DAY 13 13 15 21 22 24 5 22 6 1 1 21 MEAN QFF PRESSURE IN HPA 1017.9 1018.9 1013.1 1008.7 1009.1 1006.4 1000.9 1004.4 1007.6 1014.2 1016.6 1019.7 1011.4 MAX. QFF PRESSURE IN HPA 1027.7 1034.1 1025.1 1019.1 1020.9 1012.1 1007.2 1009.3 1016.3 1027.4 1024.4 1030.0 1034.1 DAY 22 23 26 12 3 6 20 25 12 10 24 29 MIN. QFF PRESSURE IN HPA 1001.1 999.8 1000.6 998.4 996.7 999.7 990.6 1000.6 999.7 1002.1 1006.5 1011.2 990.6 DAY 13 8 18 22 22 28 5 22 6 1 1 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 869.5 870.3 868.4 868.7 870.1 869.8 866.1 869.1 870.2 873.7 874.1 875.1 870.4 MAX. QFE PRESSURE IN HPA 877.0 881.6 878.2 877.2 876.5 874.2 871.5 871.9 875.7 882.6 880.8 883.0 883.0 DAY 22 22 26 12 8 5 19 25 12 9 20 29 MIN. QFE PRESSURE IN HPA 853.9 856.6 860.1 861.8 863.0 866.1 858.0 866.6 865.7 865.7 868.0 868.7 853.9 DAY 13 13 18 21 21 24 5 13 5 1 1 18 MEAN QNH PRESSURE IN HPA 1014.8 1015.8 1013.5 1013.9 1015.5 1015.1 1011.0 1014.3 1015.5 1019.5 1020.0 1021.1 1015.8 MAX. QNH PRESSURE IN HPA 1023.3 1028.5 1024.7 1023.5 1022.7 1020.1 1017.1 1017.5 1021.8 1029.6 1027.6 1030.1 1030.1 DAY 22 22 26 12 8 5 19 25 12 9 20 29 MIN. QNH PRESSURE IN HPA 997.1 1000.2 1004.1 1006.1 1007.4 1010.9 1001.8 1011.5 1010.5 1010.5 1013.1 1013.9 997.1 DAY 13 13 18 21 21 24 5 13 5 1 1 18 MEAN QFF PRESSURE IN HPA 1019.7 1020.5 1014.3 1009.9 1010.1 1006.6 1001.4 1005.6 1009.3 1016.6 1019.1 1022.0 1012.9 MAX. QFF PRESSURE IN HPA 1029.0 1036.0 1026.3 1020.0 1021.3 1012.1 1007.4 1009.7 1018.1 1030.5 1027.1 1032.3 1036.0 DAY 22 23 26 1 2 5 19 25 12 9 20 29 MIN. QFF PRESSURE IN HPA 1000.5 1003.6 999.2 998.7 998.7 999.6 990.2 1001.8 1001.6 1002.8 1008.5 1013.8 990.2 DAY 13 8 18 21 21 28 5 13 5 1 1 18 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 869.8 870.9 869.2 870.0 871.5 870.9 867.6 870.4 871.5 874.8 874.8 875.7 871.4 MAX. QFE PRESSURE IN HPA 877.2 882.7 879.4 878.2 878.1 875.0 872.6 872.6 876.7 883.7 882.1 883.5 883.7 DAY 22 22 26 12 8 5 19 19 12 9 20 29 MIN. QFE PRESSURE IN HPA 854.9 856.7 858.3 862.5 863.5 867.5 858.6 868.0 867.2 867.0 869.1 869.5 854.9 DAY 13 13 18 21 21 24 5 22 5 1 1 18 MEAN QNH PRESSURE IN HPA 1015.1 1016.4 1014.5 1015.3 1017.0 1016.4 1012.6 1015.8 1017.1 1020.8 1020.8 1021.8 1017.0 MAX. QNH PRESSURE IN HPA 1023.5 1029.7 1026.0 1024.7 1024.5 1021.0 1018.3 1018.3 1022.9 1030.9 1029.1 1030.7 1030.9 DAY 22 22 26 12 8 5 19 19 12 9 20 29 MIN. QNH PRESSURE IN HPA 998.2 1000.3 1002.1 1006.9 1008.0 1012.5 1002.4 1013.1 1012.2 1012.0 1014.3 1014.8 998.2 DAY 13 13 18 21 21 24 5 22 5 1 1 18 MEAN QFF PRESSURE IN HPA 1019.7 1020.8 1015.0 1010.9 1011.3 1007.4 1002.5 1006.3 1010.0 1017.1 1019.4 1022.6 1013.6 MAX. QFF PRESSURE IN HPA 1028.7 1035.8 1028.0 1021.0 1023.0 1012.2 1009.0 1009.6 1019.6 1032.2 1027.5 1032.6 1035.8 DAY 22 23 26 1 3 5 15 8 12 9 20 29 MIN. QFF PRESSURE IN HPA 1002.2 1005.3 997.1 999.1 998.9 1001.3 990.2 1002.9 1002.3 1003.8 1010.0 1014.6 990.2 DAY 13 13 18 21 21 28 5 13 5 1 1 18 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 869.3 870.4 868.8 869.9 871.1 870.6 867.2 870.2 871.3 874.6 874.6 875.6 871.1 MAX. QFE PRESSURE IN HPA 877.0 882.7 877.9 878.0 878.0 874.6 872.3 872.8 876.3 882.7 881.8 882.1 882.7 DAY 3 22 26 11 8 5 19 18 12 9 20 29 MIN. QFE PRESSURE IN HPA 854.1 856.4 855.9 863.5 862.7 867.5 858.2 867.6 866.7 866.6 869.2 868.1 854.1 DAY 13 13 18 23 21 24 5 22 5 1 16 20 MEAN QNH PRESSURE IN HPA 1014.6 1015.8 1014.0 1015.2 1016.6 1016.0 1012.2 1015.5 1016.8 1020.6 1020.5 1021.7 1016.6 MAX. QNH PRESSURE IN HPA 1023.3 1029.7 1024.3 1024.4 1024.4 1020.6 1018.0 1018.5 1022.5 1029.7 1028.7 1029.1 1029.7 DAY 3 22 26 11 8 5 19 18 12 9 20 29 MIN. QNH PRESSURE IN HPA 997.3 999.9 999.4 1008.0 1007.1 1012.5 1002.0 1012.6 1011.6 1011.5 1014.4 1013.2 997.3 DAY 13 13 18 23 21 24 5 22 5 1 16 20 MEAN QFF PRESSURE IN HPA 1018.4 1019.7 1013.9 1010.2 1010.5 1006.9 1001.7 1005.7 1009.1 1016.1 1018.2 1021.4 1012.6 MAX. QFF PRESSURE IN HPA 1028.1 1035.8 1025.7 1020.6 1021.6 1011.9 1007.8 1008.4 1018.7 1030.4 1025.8 1030.7 1035.8 DAY 3 22 26 1 2 5 19 8 12 9 24 29 MIN. QFF PRESSURE IN HPA 1000.7 1004.3 993.1 999.7 996.8 1000.3 988.8 1002.3 1000.6 1002.5 1009.3 1012.7 988.8 DAY 13 13 18 21 21 28 5 12 5 1 1 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 1999 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.3 5.9 5.9 11.1 16.5 22.7 23.0 24.6 19.1 13.8 5.6 5.3 12.9 MINIMUN AIR TEMPERATURE (C) -2.5 0.8 1.6 5.2 9.8 14.9 15.8 16.2 11.4 6.8 1.4 -0.7 6.7 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 1 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 10 0 3 0 0 0 0 0 0 0 1 3 17 DAYS WITH FREEZING MIN.<= 0 25 14 10 1 0 0 0 0 0 0 13 19 82 TEMPERATURE RECORDS LOWEST(C) -11.4 -3.2 -5.6 -0.2 5.2 11.0 11.0 12.6 3.0 0.8 -6.0 -5.6 -11.4 DAY 3 1 19 24 23 18 14 16 29 26 30 2 MAXIMUM AIR TEMPERATURE (C) 6.0 12.1 11.5 18.1 23.7 30.2 30.1 32.4 27.5 22.2 10.2 10.9 19.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 4 14 16 28 11 1 0 0 74 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 15.0 20.0 19.4 25.6 32.8 36.6 35.4 37.4 35.2 30.2 17.6 16.4 37.4 DAY 16 27 26 14 31 29 4 29 13 12 25 29 DIF. BETWEEN (MAX.-MIN.) (C) 8.5 11.3 9.9 12.9 13.9 15.3 14.3 16.2 16.1 15.4 8.8 11.6 12.9 MEAN DAILY TEMP. (MDT) (C) 1.7 6.4 6.6 11.6 16.8 22.5 22.9 24.3 19.5 14.5 5.8 5.1 13.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 6.0 52.6 71.5 101.5 18.8 0.0 0.0 0.0 250.4 HEATING DEG. DAYS(BASE 18 0C) 503.8 324.3 354.5 190.5 67.9 0.0 1.2 0.0 28.8 112.9 365.1 399.8 2348.8 DEWPOINT (MEAN C) -2.5 -1.1 0.1 2.9 6.0 6.2 8.4 4.8 4.8 2.7 1.1 -1.2 2.7 MIXING RATIO (G/KG) 3.77 4.13 4.57 5.60 6.93 7.18 8.22 6.52 6.58 5.49 4.85 4.07 5.66 VAPOUR PRESSURE (HPA) 5.24 5.74 6.33 7.76 9.58 9.88 11.30 9.00 9.10 7.64 6.74 5.69 7.84 SATURATION DEF. (HPA) 1.76 4.00 3.44 6.26 10.39 18.99 18.04 23.52 14.63 9.36 2.73 3.59 9.73 RELATIVE HUMIDITY (MEAN %) 78 65 71 62 55 39 43 31 44 52 76 67 57 RELATIVE HUMIDITY (MAX. %) 92 85 89 84 77 62 66 49 67 72 91 86 77 RELATIVE HUMIDITY (MIN. %) 58 42 47 36 34 21 25 16 23 31 57 47 36 RELATIVE HUMIDITY (MEAN% 03UTC) 87 79 85 79 70 55 62 46 63 68 88 85 72 RELATIVE HUMIDITY (MEAN% 09UTC) 66 49 55 44 40 26 29 19 30 37 63 52 43 RELATIVE HUMIDITY (MEAN% 15UTC) 75 60 64 52 43 27 32 22 33 46 73 69 50 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 66.5 43.4 53.2 41.1 21.8 0.0 16.4 1.1 3.4 11.8 64.5 28.0 351.2 DAYS WITH PRECIPITATION >=10 2 1 1 1 0 0 0 0 0 0 3 1 9 DAYS WITH PRECIPITATION >= 5 5 4 3 3 3 0 0 0 0 1 4 2 25 DAYS WITH PRECIPITATION >= 1 7 6 6 10 4 0 6 1 1 3 12 2 58 DAYS WITH PRECIPITATION 12 9 13 14 7 0 9 1 2 5 16 2 90 GREATEST DAILY PRECIPITATION 22.0 13.5 20.0 10.0 8.8 0.0 4.8 1.1 3.0 8.0 19.2 20.0 22.0 DAY 1 21 2 22 11 ** 28 31 28 25 2 17 DAY WITH THUNDER STORM 0 0 1 0 3 0 0 0 0 1 0 0 5 DAYS WITH SNOW OR SLEET 7 4 7 1 0 0 0 0 0 2 5 0 26 DAYS WITH DUST 0 0 0 0 0 0 0 1 0 1 0 0 2 WIND DIRECTION (PREVAILING) 315 135 135 135 315 90 90 45 135 135 315 135 135 PREVAILING WIND SPEED(KNOTS) 5.6 5.1 6.0 6.1 5.7 5.7 5.6 6.0 5.5 4.8 5.1 5.3 5.5 PREVAILING WIND PERCENT 14.9 15.6 23.0 25.0 19.0 14.6 16.1 22.6 19.2 14.5 12.3 8.7 13.9 CALMS PERCENT OF WIND 64.5 50.4 36.3 28.8 33.9 35.8 39.9 50.4 42.5 54.4 62.6 75.5 47.2 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 211 184 2827 VECTOR WIND DIRECTION (MEAN) 297 180 153 151 136 66 47 53 110 113 203 164 106 VECTOR WIND MAGNITUDE(KNOTS) 0.6 0.7 0.9 1.2 0.4 1.0 1.3 1.7 1.4 0.6 0.5 0.3 0.5 WIND STEADINESES (MEAN %) 35.3 25.9 25.0 29.3 10.8 27.8 40.6 63.0 46.7 25.0 26.3 25.0 17.9 WIND SPEED (MEAN KNOTS) 1.7 2.7 3.6 4.1 3.7 3.6 3.2 2.7 3.0 2.4 1.9 1.2 2.8 FASTEST WIND DIRECTION 310 220 310 300 160 70 90 70 150 310 160 160 220 FASTEST WIND SPEED (KNOTS) 12 14 12 12 14 12 10 14 12 14 12 12 14 DAY 1 20 12 6 10 5 1 9 12 13 1 11 DAYS WITH SKY CLEAR (0-2)/8 13 15 8 10 19 25 21 30 26 23 9 15 214 DAYS WITH P.CLOUDY (3-6)/8 8 6 11 14 9 5 9 1 3 5 9 10 90 DAYS WITH CLOUDY (7-8)/8 10 7 12 6 3 0 1 0 1 3 12 6 61 DAYS WITH VISIBILITY =< 2 KM 7 3 2 0 0 0 0 0 0 2 8 4 26 DURATION OF SUNSHINE HOURS 144.1 184.0 169.7 238.0 300.9 342.7 321.7 364.1 299.5 265.7 138.1 177.9 2946.4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 872.1 869.5 869.5 870.7 870.3 867.8 866.9 868.6 870.4 872.8 873.0 875.3 870.6 MAX. QFE PRESSURE IN HPA 886.0 878.6 876.3 878.6 875.5 875.6 871.9 875.5 875.8 879.0 881.2 883.4 886.0 DAY-HOUR 2- 6 12- 6 31- 6 23- 6 2- 6 16-18 18-18 20- 6 5- 6 26- 6 30-15 1- 6 MIN. QFE PRESSURE IN HPA 864.8 855.8 862.0 862.0 860.4 857.1 861.4 864.9 864.6 866.9 864.2 866.7 855.8 DAY-HOUR 9-12 21- 0 21-12 9- 0 20-15 25-12 14-12 13-12 16-12 31-12 26-12 14-12 MEAN QNH PRESSURE IN HPA 1017.7 1014.8 1014.8 1016.1 1015.7 1012.8 1011.8 1013.7 1015.8 1018.5 1018.7 1021.4 1016.0 MAX. QNH PRESSURE IN HPA 1033.5 1025.1 1022.5 1025.1 1021.6 1021.7 1017.5 1021.6 1021.9 1025.6 1028.0 1030.5 1033.5 DAY-HOUR 2- 6 12- 6 31- 6 23- 6 2- 6 16-18 18-18 20- 6 5- 6 26- 6 30-15 1- 6 MIN. QNH PRESSURE IN HPA 1009.5 999.3 1006.3 1006.3 1004.5 1000.7 1005.6 1009.6 1009.2 1011.8 1008.8 1011.6 999.3 DAY-HOUR 9-12 21- 0 21-12 9- 0 20-15 25-12 14-12 13-12 16-12 31-12 26-12 14-12 MEAN QFF PRESSURE IN HPA 1020.7 1015.1 1015.0 1013.4 1010.1 1004.0 1002.7 1004.0 1008.8 1014.5 1019.4 ****** ****** MAX. QFF PRESSURE IN HPA 1042.1 1027.5 1028.1 1027.0 1018.5 1014.7 1009.3 1012.5 1020.4 1028.0 1034.8 ****** ****** DAY-HOUR 2- 6 12- 6 19- 6 23- 3 9- 6 17- 3 19- 3 20- 3 29- 3 26- 6 30-15 **-** MIN. QFF PRESSURE IN HPA 1009.3 994.9 1003.9 1001.1 995.8 990.2 997.9 997.8 999.1 1006.3 1007.0 ****** ****** DAY-HOUR 10- 0 21- 0 21-15 14-12 20-15 25-12 2-12 30- 9 13-12 18-12 1- 9 **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 871.9 869.1 869.1 870.5 870.4 868.1 866.9 868.5 870.5 872.9 873.1 ****** ****** MAX. QFE PRESSURE IN HPA 882.4 877.0 875.5 877.2 874.8 875.0 870.2 874.4 874.2 877.3 878.1 ****** ****** DAY 2 12 31 23 28 17 19 20 5 26 3 ** MIN. QFE PRESSURE IN HPA 865.6 855.8 863.8 862.0 864.8 859.1 864.0 865.7 866.3 869.5 867.6 ****** ****** DAY 10 21 22 9 20 25 22 7 16 13 20 ** MEAN QNH PRESSURE IN HPA 1017.5 1014.3 1014.3 1015.9 1015.8 1013.2 1011.8 1013.7 1015.9 1018.6 1018.8 ****** ****** MAX. QNH PRESSURE IN HPA 1029.4 1023.3 1021.6 1023.5 1020.8 1021.0 1015.6 1020.3 1020.1 1023.6 1024.5 ****** ****** DAY 2 12 31 23 28 17 19 20 5 26 3 ** MIN. QNH PRESSURE IN HPA 1010.4 999.3 1008.3 1006.3 1009.5 1003.0 1008.6 1010.5 1011.2 1014.8 1012.6 ****** ****** DAY 10 21 22 9 20 25 22 7 16 13 20 ** MEAN QFF PRESSURE IN HPA 1019.9 1014.1 1014.0 1013.0 1010.0 1004.3 1002.7 1003.9 1008.6 1014.1 1018.8 ****** ****** MAX. QFF PRESSURE IN HPA 1036.7 1025.6 1025.1 1024.7 1016.6 1013.6 1008.4 1011.1 1019.3 1024.1 1025.6 ****** ****** DAY 3 12 19 23 12 17 29 20 29 26 3 ** MIN. QFF PRESSURE IN HPA 1009.3 994.9 1004.4 1002.4 999.9 992.4 999.0 999.2 1001.8 1007.3 1008.9 ****** ****** DAY 10 21 27 9 20 26 23 7 16 13 20 ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 871.9 869.6 869.6 870.9 870.9 868.7 867.6 869.2 871.2 873.3 872.9 875.6 870.9 MAX. QFE PRESSURE IN HPA 884.0 877.0 876.0 878.3 875.4 875.1 871.8 875.1 875.2 877.7 879.4 882.5 884.0 DAY 2 12 31 23 28 17 19 20 5 26 30 1 MIN. QFE PRESSURE IN HPA 865.8 856.6 864.3 864.0 865.5 859.3 864.6 866.4 866.6 869.9 866.1 868.7 856.6 DAY 10 21 22 9 20 25 22 7 13 13 26 16 MEAN QNH PRESSURE IN HPA 1017.5 1014.9 1014.9 1016.4 1016.4 1013.9 1012.7 1014.5 1016.7 1019.1 1018.7 1021.7 1016.4 MAX. QNH PRESSURE IN HPA 1031.2 1023.3 1022.2 1024.8 1021.5 1021.1 1017.4 1021.1 1021.2 1024.1 1026.0 1029.5 1031.2 DAY 2 12 31 23 28 17 19 20 5 26 30 1 MIN. QNH PRESSURE IN HPA 1010.6 1000.2 1008.9 1008.6 1010.3 1003.2 1009.2 1011.3 1011.5 1015.2 1010.9 1013.9 1000.2 DAY 10 21 22 9 20 25 22 7 13 13 26 16 MEAN QFF PRESSURE IN HPA 1021.0 1015.8 1015.7 1014.4 1011.2 1005.4 1004.1 1005.5 1010.7 1016.1 1019.7 1024.0 1013.6 MAX. QFF PRESSURE IN HPA 1039.5 1025.8 1027.9 1027.0 1018.1 1014.7 1009.3 1012.5 1020.4 1025.5 1032.4 1035.3 1039.5 DAY 2 12 19 23 9 17 19 20 29 26 30 1 MIN. QFF PRESSURE IN HPA 1010.1 996.8 1007.6 1005.5 1002.2 993.7 1000.3 1000.9 1003.9 1009.0 1009.1 1014.1 993.7 DAY 10 21 21 14 20 25 22 6 13 13 26 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 872.8 870.5 870.4 871.4 871.0 868.6 867.7 869.4 871.5 873.8 873.7 876.5 871.4 MAX. QFE PRESSURE IN HPA 886.0 878.6 876.3 878.6 875.5 874.5 871.5 875.5 875.8 879.0 880.8 883.4 886.0 DAY 2 12 31 23 2 17 19 20 5 26 30 1 MIN. QFE PRESSURE IN HPA 866.6 859.4 864.8 864.7 864.5 859.3 864.5 866.6 866.5 870.9 866.7 869.9 859.3 DAY 28 21 21 14 14 25 12 7 13 31 26 16 MEAN QNH PRESSURE IN HPA 1018.5 1015.9 1015.8 1017.0 1016.5 1013.8 1012.8 1014.6 1017.0 1019.7 1019.5 1022.8 1017.0 MAX. QNH PRESSURE IN HPA 1033.5 1025.1 1022.5 1025.1 1021.6 1020.5 1017.1 1021.6 1021.9 1025.6 1027.6 1030.5 1033.5 DAY 2 12 31 23 2 17 19 20 5 26 30 1 MIN. QNH PRESSURE IN HPA 1011.5 1003.3 1009.5 1009.3 1009.1 1003.2 1009.1 1011.5 1011.4 1016.4 1011.6 1015.2 1003.2 DAY 28 21 21 14 14 25 12 7 13 31 26 16 MEAN QFF PRESSURE IN HPA 1021.8 1016.6 1016.4 1014.5 1011.0 1004.9 1003.6 1004.5 1010.0 1015.6 1020.7 ****** ****** MAX. QFF PRESSURE IN HPA 1042.1 1027.5 1028.1 1026.9 1018.5 1013.5 1008.4 1012.0 1018.8 1028.0 1028.5 ****** ****** DAY 2 12 19 23 9 17 28 20 29 26 14 ** MIN. QFF PRESSURE IN HPA 1010.9 1000.7 1007.8 1004.5 1000.8 993.1 999.6 1000.0 1002.2 1010.4 1010.9 ****** ****** DAY 10 21 21 14 20 25 22 6 16 12 1 ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 872.1 869.6 869.6 870.5 870.0 867.5 866.6 868.3 870.0 872.3 872.5 875.2 870.3 MAX. QFE PRESSURE IN HPA 884.4 877.3 875.5 877.5 874.6 872.9 870.6 873.6 874.8 877.8 880.3 881.7 884.4 DAY 2 12 1 23 28 16 18 20 28 26 30 24 MIN. QFE PRESSURE IN HPA 865.9 861.3 864.0 863.7 862.6 857.7 863.2 865.2 865.3 868.2 864.9 867.9 857.7 DAY 28 21 21 14 14 25 12 30 13 31 26 14 MEAN QNH PRESSURE IN HPA 1017.7 1014.9 1014.9 1015.9 1015.4 1012.5 1011.5 1013.5 1015.3 1018.0 1018.2 1021.2 1015.7 MAX. QNH PRESSURE IN HPA 1031.7 1023.6 1021.6 1023.9 1020.6 1018.6 1016.0 1019.4 1020.8 1024.2 1027.0 1028.6 1031.7 DAY 2 12 1 23 28 16 18 20 28 26 30 24 MIN. QNH PRESSURE IN HPA 1010.7 1005.5 1008.6 1008.2 1007.0 1001.4 1007.6 1009.9 1010.0 1013.3 1009.6 1013.0 1001.4 DAY 28 21 21 14 14 25 12 30 13 31 26 14 MEAN QFF PRESSURE IN HPA 1020.3 1014.8 1014.7 1012.8 1009.5 1003.3 1002.0 1003.3 1007.7 1013.1 1018.7 ****** ****** MAX. QFF PRESSURE IN HPA 1039.8 1025.1 1025.0 1024.4 1016.0 1010.8 1007.0 1009.7 1018.8 1024.9 1026.8 ****** ****** DAY 2 11 19 23 9 17 13 20 28 26 14 ** MIN. QFF PRESSURE IN HPA 1010.6 1003.0 1006.6 1002.3 998.5 990.2 998.6 997.8 999.6 1007.3 1007.0 ****** ****** DAY 17 20 21 14 14 25 2 30 16 12 1 ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 871.3 868.6 868.5 869.5 869.1 866.7 865.7 867.5 869.0 871.4 872.0 874.6 869.5 MAX. QFE PRESSURE IN HPA 883.0 876.1 874.6 876.3 873.8 872.9 870.3 872.4 874.1 876.8 879.8 881.3 883.0 DAY 2 11 1 22 28 16 18 20 28 26 30 24 MIN. QFE PRESSURE IN HPA 864.8 859.4 862.0 862.1 861.6 857.1 861.4 864.9 864.6 866.9 864.2 866.7 857.1 DAY 9 20 21 14 20 25 14 13 16 31 26 14 MEAN QNH PRESSURE IN HPA 1016.9 1013.8 1013.6 1014.8 1014.4 1011.6 1010.4 1012.5 1014.2 1017.0 1017.6 1020.6 1014.8 MAX. QNH PRESSURE IN HPA 1030.1 1022.3 1020.6 1022.5 1019.7 1018.6 1015.7 1018.1 1020.0 1023.1 1026.5 1028.2 1030.1 DAY 2 11 1 22 28 16 18 20 28 26 30 24 MIN. QNH PRESSURE IN HPA 1009.5 1003.3 1006.3 1006.4 1005.8 1000.7 1005.6 1009.6 1009.2 1011.8 1008.8 1011.6 1000.7 DAY 9 20 21 14 20 25 14 13 16 31 26 14 MEAN QFF PRESSURE IN HPA 1019.3 1013.5 1013.3 1011.8 1008.5 1002.8 1001.4 1002.9 1006.9 1012.5 1018.2 ****** ****** MAX. QFF PRESSURE IN HPA 1038.2 1023.9 1021.7 1022.3 1014.0 1011.3 1008.2 1009.0 1018.1 1023.2 1025.4 ****** ****** DAY 2 11 19 23 23 16 28 20 28 26 14 ** MIN. QFF PRESSURE IN HPA 1009.5 1000.1 1004.5 1001.1 996.6 990.2 997.9 998.5 999.1 1006.3 1007.3 ****** ****** DAY 17 20 21 14 20 25 2 30 13 18 1 ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 872.1 869.3 869.2 870.1 869.5 866.9 866.2 868.0 869.7 872.5 872.8 875.3 870.1 MAX. QFE PRESSURE IN HPA 882.7 877.2 875.3 877.0 874.2 874.0 870.6 872.7 874.2 877.5 881.2 882.2 882.7 DAY 2 11 31 22 27 16 18 20 28 26 30 24 MIN. QFE PRESSURE IN HPA 865.4 860.8 862.0 862.4 860.4 857.3 863.5 865.1 865.0 868.8 865.3 867.5 857.3 DAY 9 20 21 14 20 25 12 7 16 24 26 15 MEAN QNH PRESSURE IN HPA 1017.8 1014.5 1014.5 1015.5 1014.8 1011.8 1011.0 1013.0 1015.0 1018.2 1018.5 1021.4 1015.5 MAX. QNH PRESSURE IN HPA 1029.7 1023.5 1021.4 1023.3 1020.1 1019.9 1016.0 1018.4 1020.1 1023.9 1028.0 1029.2 1029.7 DAY 2 11 31 22 27 16 18 20 28 26 30 24 MIN. QNH PRESSURE IN HPA 1010.1 1004.9 1006.3 1006.7 1004.5 1001.0 1008.0 1009.8 1009.7 1014.0 1010.0 1012.5 1001.0 DAY 9 20 21 14 20 25 12 7 16 24 26 15 MEAN QFF PRESSURE IN HPA 1021.3 1015.3 1015.2 1013.4 1009.5 1003.4 1002.5 1004.1 1009.0 1015.2 1019.6 1023.5 1012.7 MAX. QFF PRESSURE IN HPA 1039.1 1025.7 1024.5 1023.8 1015.7 1013.1 1008.3 1009.8 1018.2 1024.9 1034.8 1032.4 1039.1 DAY 2 11 18 22 11 16 28 20 28 26 30 1 MIN. QFF PRESSURE IN HPA 1011.3 1002.1 1003.9 1002.1 995.8 990.5 998.6 999.6 1001.3 1008.9 1008.6 1012.4 990.5 DAY 17 20 21 14 20 25 4 7 15 18 26 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 872.6 870.0 870.1 871.4 870.9 868.1 867.4 869.1 870.9 873.3 873.7 ****** ****** MAX. QFE PRESSURE IN HPA 882.7 877.5 876.3 878.0 875.1 875.6 871.9 874.0 874.8 878.0 879.0 ****** ****** DAY 2 11 31 22 27 16 18 19 30 25 2 ** MIN. QFE PRESSURE IN HPA 865.4 859.6 863.2 864.6 864.6 858.9 865.0 866.1 865.7 869.5 868.3 ****** ****** DAY 9 20 21 8 20 25 14 6 16 18 19 ** MEAN QNH PRESSURE IN HPA 1018.3 1015.3 1015.5 1016.9 1016.4 1013.2 1012.4 1014.3 1016.3 1019.1 1019.5 ****** ****** MAX. QNH PRESSURE IN HPA 1029.7 1023.9 1022.5 1024.4 1021.1 1021.7 1017.5 1019.9 1020.8 1024.4 1025.6 ****** ****** DAY 2 11 31 22 27 16 18 19 30 25 2 ** MIN. QNH PRESSURE IN HPA 1010.1 1003.6 1007.6 1009.2 1009.2 1002.8 1009.7 1010.9 1010.5 1014.8 1013.4 ****** ****** DAY 9 20 21 8 20 25 14 6 16 18 19 ** MEAN QFF PRESSURE IN HPA 1021.6 1016.0 1016.0 1014.4 1010.9 1004.3 1003.3 1004.2 1009.4 1015.1 1020.1 ****** ****** MAX. QFF PRESSURE IN HPA 1039.6 1026.3 1027.0 1025.4 1017.4 1014.5 1008.2 1010.3 1017.8 1025.0 1027.4 ****** ****** DAY 2 11 18 22 11 16 18 19 28 26 2 ** MIN. QFF PRESSURE IN HPA 1009.6 999.7 1006.0 1005.5 1001.6 992.0 999.2 999.1 1001.4 1008.4 1011.1 ****** ****** DAY 9 20 21 14 20 25 2 5 15 18 19 ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 872.3 869.7 869.8 871.0 870.7 867.8 867.2 868.8 870.7 873.1 873.6 ****** ****** MAX. QFE PRESSURE IN HPA 881.7 877.0 876.3 877.2 874.8 875.0 871.2 874.0 874.9 877.3 879.0 ****** ****** DAY 2 11 31 22 1 16 18 19 23 13 2 ** MIN. QFE PRESSURE IN HPA 866.0 857.0 863.8 863.4 865.0 859.0 864.7 865.7 866.0 870.0 867.6 ****** ****** DAY 9 20 21 8 19 25 22 6 10 24 19 ** MEAN QNH PRESSURE IN HPA 1018.0 1015.0 1015.1 1016.5 1016.2 1012.9 1012.2 1014.0 1016.1 1018.9 1019.4 ****** ****** MAX. QNH PRESSURE IN HPA 1028.6 1023.3 1022.5 1023.5 1020.8 1021.0 1016.7 1019.9 1020.9 1023.6 1025.6 ****** ****** DAY 2 11 31 22 1 16 18 19 23 13 2 ** MIN. QNH PRESSURE IN HPA 1010.8 1000.6 1008.3 1007.9 1009.7 1002.9 1009.3 1010.5 1010.8 1015.4 1012.6 ****** ****** DAY 9 20 21 8 19 25 22 6 10 24 19 ** MEAN QFF PRESSURE IN HPA 1020.7 1014.8 1015.0 1013.3 1010.3 1003.6 1002.6 1003.8 1008.6 1014.1 1019.4 ****** ****** MAX. QFF PRESSURE IN HPA 1038.0 1025.8 1026.1 1024.3 1017.1 1012.6 1007.3 1010.4 1018.6 1023.9 1026.7 ****** ****** DAY 2 11 18 22 11 16 18 19 28 26 2 ** MIN. QFF PRESSURE IN HPA 1010.1 996.3 1005.3 1004.0 1001.1 991.4 999.0 998.4 1001.5 1007.9 1008.6 ****** ****** DAY 9 20 26 13 19 25 22 6 15 12 19 ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 2000 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.9 0.2 6.4 16.5 20.0 21.9 24.3 24.1 20.8 12.6 4.7 3.4 13.0 MINIMUN AIR TEMPERATURE (C) -3.5 -4.3 0.9 9.2 12.2 14.2 16.5 15.6 13.7 7.3 0.6 -0.2 6.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 1 0 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 15 13 1 0 0 0 0 0 0 0 3 1 33 DAYS WITH FREEZING MIN.<= 0 26 24 14 0 0 0 0 0 0 0 15 16 95 TEMPERATURE RECORDS LOWEST(C) -11.4 -13.4 -6.0 3.0 6.0 6.2 12.0 13.0 9.4 3.8 -5.2 -4.0 -13.4 DAY 19 9 16 1 11 14 26 11 27 16 12 31 MAXIMUM AIR TEMPERATURE (C) 6.6 6.0 13.0 24.5 28.7 29.2 30.9 31.8 28.7 19.3 10.4 9.0 19.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 14 17 22 23 17 0 0 0 97 DAYS WITH MAXIMUM TEMP. <= 0 3 2 0 0 0 0 0 0 0 0 0 0 5 TEMPERATURE RECORDS HIGHEST(C) 21.6 14.4 22.4 31.8 32.8 36.2 35.0 35.4 32.8 25.0 17.2 17.2 36.2 DAY 2 24 23 10 9 24 8 29 7 12 2 31 DIF. BETWEEN (MAX.-MIN.) (C) 10.1 10.3 12.1 15.3 16.5 15.0 14.4 16.2 15.0 12.0 9.8 9.2 13.1 MEAN DAILY TEMP. (MDT) (C) 1.6 0.8 7.0 16.8 20.4 21.7 23.7 23.7 21.2 13.3 5.5 4.4 13.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.9 22.0 54.1 85.7 85.0 31.3 0.0 0.0 0.0 281.1 HEATING DEG. DAYS(BASE 18 0C) 509.8 498.5 341.6 62.2 6.9 11.2 0.0 0.0 2.0 146.7 375.0 421.8 2375.6 DEWPOINT (MEAN C) -4.1 -3.7 -0.7 5.1 7.5 6.0 5.3 3.4 6.1 4.7 -1.0 -0.9 2.3 MIXING RATIO (G/KG) 3.35 3.45 4.26 6.58 7.71 7.05 6.77 6.02 7.10 6.26 4.19 4.17 5.57 VAPOUR PRESSURE (HPA) 4.65 4.80 5.91 9.09 10.63 9.72 9.34 8.32 9.81 8.71 5.85 5.81 7.72 SATURATION DEF. (HPA) 2.40 1.76 4.54 11.00 14.11 18.19 22.21 23.15 16.01 6.50 3.08 2.25 10.43 RELATIVE HUMIDITY (MEAN %) 73 77 65 51 48 40 32 30 44 63 70 76 56 RELATIVE HUMIDITY (MAX. %) 87 90 85 75 72 62 50 48 68 83 88 91 75 RELATIVE HUMIDITY (MIN. %) 52 57 43 28 28 23 19 16 23 41 47 57 36 RELATIVE HUMIDITY (MEAN% 03UTC) 84 87 80 72 67 54 47 47 63 81 85 86 71 RELATIVE HUMIDITY (MEAN% 09UTC) 58 66 49 36 35 27 21 18 26 47 53 62 42 RELATIVE HUMIDITY (MEAN% 15UTC) 72 75 59 40 36 30 24 21 35 54 67 73 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 60.1 52.1 33.4 2.6 4.1 21.0 0.6 0.0 4.2 20.4 46.3 26.7 271.5 DAYS WITH PRECIPITATION >=10 2 3 1 0 0 1 0 0 0 1 3 1 12 DAYS WITH PRECIPITATION >= 5 4 3 3 0 0 1 0 0 0 1 3 2 17 DAYS WITH PRECIPITATION >= 1 6 8 5 1 1 2 0 0 2 2 5 4 36 DAYS WITH PRECIPITATION 12 9 12 7 3 3 1 1 3 5 10 6 72 GREATEST DAILY PRECIPITATION 26.0 15.0 14.0 1.0 4.0 17.0 0.6 0.0 3.0 17.0 19.0 16.0 26.0 DAY 30 8 3 23 22 13 9 ** 24 15 6 16 DAY WITH THUNDER STORM 0 0 0 0 1 1 0 1 1 1 0 0 5 DAYS WITH SNOW OR SLEET 8 10 6 0 0 0 0 0 0 0 3 2 29 DAYS WITH DUST 0 0 0 0 1 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 315 315 135 135 135 90 45 45 90 135 135 135 135 PREVAILING WIND SPEED(KNOTS) 5.3 4.7 5.0 4.7 5.7 4.7 5.0 5.4 5.4 4.6 4.4 4.9 4.9 PREVAILING WIND PERCENT 9.7 8.6 13.3 17.9 19.0 12.9 20.7 16.5 14.2 15.7 9.6 10.1 9.8 CALMS PERCENT OF WIND 82.3 77.2 51.2 52.5 38.3 49.6 61.0 56.5 50.4 54.0 77.9 76.6 60.6 NO. OF WIND OBSERVATION 248 232 248 240 248 240 241 248 240 248 240 248 2921 VECTOR WIND DIRECTION (MEAN) 298 272 191 136 114 68 56 64 87 173 168 144 93 VECTOR WIND MAGNITUDE(KNOTS) 0.4 0.2 0.6 0.4 1.4 1.1 1.4 1.6 0.7 0.5 0.1 0.4 0.5 WIND STEADINESES (MEAN %) 50.0 18.2 24.0 19.0 42.4 44.0 77.8 76.2 29.2 23.8 10.0 40.0 26.3 WIND SPEED (MEAN KNOTS) 0.8 1.1 2.5 2.1 3.3 2.5 1.8 2.1 2.4 2.1 1.0 1.0 1.9 FASTEST WIND DIRECTION 300 330 300 270 160 90 360 270 60 300 320 120 300 FASTEST WIND SPEED (KNOTS) 10 8 14 10 14 10 10 12 12 12 8 8 14 DAY 7 8 25 22 5 11 9 7 5 1 10 10 DAYS WITH SKY CLEAR (0-2)/8 17 15 12 13 24 26 29 29 21 18 13 9 226 DAYS WITH P.CLOUDY (3-6)/8 7 7 10 15 7 4 2 2 9 11 15 14 103 DAYS WITH CLOUDY (7-8)/8 7 7 9 2 0 0 0 0 0 2 2 8 37 DAYS WITH VISIBILITY =< 2 KM 5 8 3 0 0 0 0 0 0 0 4 9 29 DURATION OF SUNSHINE HOURS 168.6 186.1 203.3 254.1 318.8 357.3 375.4 362.5 273.0 226.3 168.2 143.0 3036.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 870.1 870.6 869.5 869.3 868.6 868.2 868.6 869.2 870.4 874.2 875.5 872.5 870.6 MAX. QFE PRESSURE IN HPA 877.8 880.2 879.2 875.7 876.7 874.4 873.9 873.8 876.2 879.4 886.0 880.4 886.0 DAY-HOUR 31- 3 29- 6 27- 6 3- 6 5- 3 16- 3 30-18 23- 3 29- 3 15-21 17- 6 4- 6 MIN. QFE PRESSURE IN HPA 858.8 860.8 861.1 863.8 861.0 861.3 863.2 863.3 862.7 869.3 868.8 863.0 858.8 DAY-HOUR 21- 3 7- 9 9- 9 25-12 27-12 24-12 8-15 31-12 1-12 1- 0 21-12 16- 0 MEAN QNH PRESSURE IN HPA 1015.5 1016.1 1014.8 1014.5 1013.7 1013.4 1013.8 1014.4 1015.8 1020.2 1021.6 1018.2 1016.0 MAX. QNH PRESSURE IN HPA 1024.2 1026.9 1025.8 1021.8 1022.9 1020.3 1019.8 1019.7 1022.4 1026.0 1033.5 1027.1 1033.5 DAY-HOUR 31- 3 29- 6 27- 6 3- 6 5- 3 16- 3 30-18 23- 3 29- 3 15-21 17- 6 4- 6 MIN. QNH PRESSURE IN HPA 1002.7 1004.9 1005.3 1008.3 1005.2 1005.5 1007.6 1007.8 1007.1 1014.6 1014.0 1007.4 1002.7 DAY-HOUR 21- 3 7- 9 9- 9 25-12 27-12 24-12 8-15 31-12 1-12 1- 0 21-12 16- 0 MEAN QFF PRESSURE IN HPA 1018.7 1019.7 1014.8 1008.9 1006.2 1004.9 1004.5 1005.0 1007.9 1016.7 1022.6 1020.0 1012.5 MAX. QFF PRESSURE IN HPA 1031.9 1031.6 1027.0 1020.5 1016.8 1016.8 1010.7 1011.7 1016.6 1025.8 1037.6 1029.5 1037.6 DAY-HOUR 31- 3 11- 3 27- 6 3- 3 5- 3 13-18 26- 3 20- 3 29-18 16- 3 17- 3 10- 6 MIN. QFF PRESSURE IN HPA 1003.4 1006.4 999.4 999.9 995.3 994.4 996.7 997.5 997.2 1007.5 1014.0 1008.6 994.4 DAY-HOUR 21- 9 26- 0 25- 0 30-12 27-12 24-12 8-15 31-12 1- 9 1- 0 6-15 16- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 870.0 870.1 869.2 869.5 869.0 868.3 868.8 869.3 870.3 874.1 875.4 872.6 870.5 MAX. QFE PRESSURE IN HPA 877.2 877.4 878.1 874.4 875.6 873.0 873.0 872.6 875.0 879.0 884.7 878.5 884.7 DAY 31 29 27 3 5 16 31 23 30 16 17 10 MIN. QFE PRESSURE IN HPA 859.7 861.2 861.7 865.4 864.1 864.4 865.2 864.3 864.3 869.3 869.5 863.0 859.7 DAY 21 7 25 22 27 26 15 31 1 1 7 16 MEAN QNH PRESSURE IN HPA 1015.4 1015.4 1014.5 1014.8 1014.2 1013.5 1014.0 1014.5 1015.7 1020.0 1021.5 1018.3 1016.0 MAX. QNH PRESSURE IN HPA 1023.5 1023.7 1024.5 1020.3 1021.7 1018.8 1018.8 1018.3 1021.0 1025.6 1032.0 1025.0 1032.0 DAY 31 29 27 3 5 16 31 23 30 16 17 10 MIN. QNH PRESSURE IN HPA 1003.7 1005.4 1005.9 1010.1 1008.7 1009.0 1009.9 1008.9 1008.9 1014.6 1014.8 1007.4 1003.7 DAY 21 7 25 22 27 26 15 31 1 1 7 16 MEAN QFF PRESSURE IN HPA 1017.9 1018.5 1014.2 1009.2 1006.5 1005.1 1004.8 1005.2 1007.6 1016.1 1022.0 1019.5 1012.2 MAX. QFF PRESSURE IN HPA 1030.9 1029.7 1025.9 1018.0 1014.3 1013.4 1009.7 1009.7 1015.0 1025.1 1035.6 1026.5 1035.6 DAY 31 11 16 3 5 14 26 20 30 16 17 10 MIN. QFF PRESSURE IN HPA 1004.2 1006.4 999.4 1001.1 999.5 998.1 998.5 998.7 998.9 1007.5 1015.1 1008.6 998.1 DAY 21 26 25 22 27 24 9 31 1 1 6 16 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 870.4 870.5 869.8 869.8 869.4 869.0 869.2 870.0 871.1 874.6 875.7 872.7 871.0 MAX. QFE PRESSURE IN HPA 877.8 878.4 878.6 875.1 876.7 874.4 873.7 873.8 876.2 879.0 885.1 878.8 885.1 DAY 31 29 27 3 5 16 31 23 29 16 17 4 MIN. QFE PRESSURE IN HPA 858.8 860.9 862.4 866.1 864.2 864.5 864.5 865.2 865.5 869.3 869.6 863.2 858.8 DAY 21 7 25 22 27 24 11 31 1 1 22 16 MEAN QNH PRESSURE IN HPA 1015.8 1015.9 1015.1 1015.2 1014.6 1014.2 1014.4 1015.3 1016.6 1020.5 1021.9 1018.5 1016.5 MAX. QNH PRESSURE IN HPA 1024.2 1024.9 1025.1 1021.1 1022.9 1020.3 1019.5 1019.7 1022.4 1025.6 1032.5 1025.3 1032.5 DAY 31 29 27 3 5 16 31 23 29 16 17 4 MIN. QNH PRESSURE IN HPA 1002.7 1005.0 1006.7 1010.9 1008.8 1009.1 1009.1 1009.9 1010.3 1014.6 1014.9 1007.6 1002.7 DAY 21 7 25 22 27 24 11 31 1 1 22 16 MEAN QFF PRESSURE IN HPA 1019.6 1020.3 1015.9 1010.4 1007.6 1006.1 1005.3 1006.7 1009.6 1017.9 1023.7 1020.8 1013.7 MAX. QFF PRESSURE IN HPA 1031.9 1031.6 1026.4 1020.5 1016.8 1015.0 1010.7 1011.7 1016.5 1025.8 1037.6 1027.5 1037.6 DAY 31 11 16 3 5 16 26 20 26 16 17 10 MIN. QFF PRESSURE IN HPA 1005.1 1007.7 1000.2 1003.5 999.8 997.8 998.5 1000.6 1001.0 1008.8 1015.6 1009.7 997.8 DAY 21 7 25 22 27 24 11 31 1 1 6 16 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.2 871.4 870.3 870.1 869.3 868.9 869.1 870.0 871.4 875.2 876.4 873.5 871.4 MAX. QFE PRESSURE IN HPA 877.8 880.2 879.2 875.7 876.2 874.2 873.5 873.8 875.7 879.4 886.0 880.4 886.0 DAY 31 29 27 3 5 16 30 23 29 16 17 4 MIN. QFE PRESSURE IN HPA 860.6 861.3 862.3 867.0 863.6 863.5 864.6 865.3 865.1 870.0 870.9 864.9 860.6 DAY 21 7 9 22 27 26 11 3 1 1 22 16 MEAN QNH PRESSURE IN HPA 1016.7 1016.9 1015.7 1015.5 1014.5 1014.1 1014.3 1015.3 1017.0 1021.2 1022.6 1019.4 1016.9 MAX. QNH PRESSURE IN HPA 1024.2 1026.9 1025.8 1021.8 1022.4 1020.1 1019.3 1019.7 1021.8 1026.0 1033.5 1027.1 1033.5 DAY 31 29 27 3 5 16 30 23 29 16 17 4 MIN. QNH PRESSURE IN HPA 1004.7 1005.5 1006.6 1012.0 1008.1 1008.0 1009.2 1010.0 1009.8 1015.4 1016.4 1009.6 1004.7 DAY 21 7 9 22 27 26 11 3 1 1 22 16 MEAN QFF PRESSURE IN HPA 1020.3 1020.9 1016.0 1009.8 1007.0 1005.7 1004.9 1005.5 1009.0 1017.9 1023.9 1021.5 1013.5 MAX. QFF PRESSURE IN HPA 1030.4 1030.8 1027.0 1020.2 1015.8 1014.7 1009.7 1010.4 1016.0 1025.4 1037.6 1029.5 1037.6 DAY 31 11 27 3 5 16 26 19 29 16 17 10 MIN. QFF PRESSURE IN HPA 1004.7 1007.9 1001.5 1003.6 998.4 996.9 999.6 998.9 999.6 1009.5 1016.2 1012.1 996.9 DAY 21 7 25 10 27 24 8 3 1 1 6 16 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 870.1 870.7 869.4 869.0 867.9 867.9 868.2 868.9 870.1 873.8 875.1 872.2 870.3 MAX. QFE PRESSURE IN HPA 876.5 879.9 877.9 874.8 874.7 872.9 872.9 873.2 875.1 878.6 884.8 879.4 884.8 DAY 31 29 27 3 5 3 30 23 29 16 17 4 MIN. QFE PRESSURE IN HPA 860.2 860.8 861.1 865.6 862.3 862.7 864.2 864.2 863.3 869.7 869.8 864.9 860.2 DAY 21 7 9 23 27 24 11 3 1 1 21 15 MEAN QNH PRESSURE IN HPA 1015.4 1016.2 1014.7 1014.2 1013.0 1013.0 1013.4 1014.2 1015.4 1019.7 1021.1 1017.8 1015.7 MAX. QNH PRESSURE IN HPA 1022.7 1026.6 1024.3 1020.8 1020.7 1018.6 1018.6 1019.0 1021.1 1025.1 1032.1 1026.0 1032.1 DAY 31 29 27 3 5 3 30 23 29 16 17 4 MIN. QNH PRESSURE IN HPA 1004.2 1004.9 1005.3 1010.4 1006.6 1007.1 1008.8 1008.8 1007.8 1015.0 1015.1 1009.6 1004.2 DAY 21 7 9 23 27 24 11 3 1 1 21 15 MEAN QFF PRESSURE IN HPA 1018.0 1019.3 1014.2 1008.1 1004.9 1004.3 1003.8 1004.3 1007.0 1015.5 1021.5 1019.0 1011.7 MAX. QFF PRESSURE IN HPA 1028.3 1029.8 1024.7 1018.4 1014.3 1013.3 1009.0 1009.1 1014.5 1024.1 1035.6 1026.7 1035.6 DAY 31 29 27 3 5 13 26 19 29 16 17 4 MIN. QFF PRESSURE IN HPA 1003.4 1007.6 1001.7 1002.0 996.5 995.6 997.5 997.5 997.2 1008.6 1015.1 1010.3 995.6 DAY 21 7 25 30 27 24 9 3 1 1 3 21 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 869.3 870.1 868.5 868.0 866.7 867.1 867.7 868.1 869.0 873.1 874.5 871.6 869.5 MAX. QFE PRESSURE IN HPA 874.8 879.0 876.7 873.2 873.6 872.4 873.1 872.4 874.0 877.5 883.6 879.0 883.6 DAY 8 29 27 3 5 3 30 23 29 16 17 4 MIN. QFE PRESSURE IN HPA 860.0 861.6 862.2 863.8 861.0 861.3 863.3 863.3 862.7 869.5 868.8 864.3 860.0 DAY 21 7 9 25 27 24 10 31 1 10 21 15 MEAN QNH PRESSURE IN HPA 1014.6 1015.4 1013.6 1013.0 1011.6 1012.1 1012.8 1013.2 1014.2 1018.9 1020.4 1017.2 1014.8 MAX. QNH PRESSURE IN HPA 1020.8 1025.6 1022.9 1019.0 1019.4 1018.1 1018.9 1018.1 1019.9 1023.9 1030.8 1025.6 1030.8 DAY 8 29 27 3 5 3 30 23 29 16 17 4 MIN. QNH PRESSURE IN HPA 1004.0 1005.8 1006.5 1008.3 1005.2 1005.5 1007.8 1007.8 1007.1 1014.8 1014.0 1008.9 1004.0 DAY 21 7 9 25 27 24 10 31 1 10 21 15 MEAN QFF PRESSURE IN HPA 1017.2 1018.4 1013.1 1007.3 1003.9 1003.7 1004.0 1003.9 1006.1 1015.0 1021.0 1018.3 1011.0 MAX. QFF PRESSURE IN HPA 1026.7 1029.0 1024.1 1016.6 1012.9 1013.1 1009.8 1009.2 1013.0 1023.2 1034.2 1026.2 1034.2 DAY 31 10 27 2 5 13 30 23 29 16 17 10 MIN. QFF PRESSURE IN HPA 1004.4 1008.6 1003.3 999.9 995.3 994.4 997.0 997.5 997.5 1008.5 1014.2 1010.8 994.4 DAY 21 7 25 30 27 24 8 31 1 13 6 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 869.9 870.5 869.1 868.5 867.6 867.3 867.9 868.3 869.6 873.8 875.3 872.5 870.0 MAX. QFE PRESSURE IN HPA 876.8 878.9 876.3 873.6 873.9 871.7 873.4 872.4 874.5 878.2 883.6 879.0 883.6 DAY 24 29 27 3 5 3 30 23 29 30 17 4 MIN. QFE PRESSURE IN HPA 861.1 863.6 862.2 864.3 862.6 861.9 863.2 863.6 863.2 869.8 869.0 865.0 861.1 DAY 21 7 13 21 27 24 8 3 1 12 6 15 MEAN QNH PRESSURE IN HPA 1015.3 1016.0 1014.3 1013.6 1012.6 1012.3 1013.0 1013.4 1014.8 1019.7 1021.4 1018.2 1015.4 MAX. QNH PRESSURE IN HPA 1023.1 1025.4 1022.5 1019.4 1019.8 1017.3 1019.2 1018.1 1020.5 1024.7 1030.8 1025.6 1030.8 DAY 24 29 27 3 5 3 30 23 29 30 17 4 MIN. QNH PRESSURE IN HPA 1005.3 1008.1 1006.5 1008.9 1007.0 1006.2 1007.6 1008.1 1007.6 1015.1 1014.2 1009.7 1005.3 DAY 21 7 13 21 27 24 8 3 1 12 6 15 MEAN QFF PRESSURE IN HPA 1019.2 1020.2 1014.9 1008.7 1005.7 1004.2 1003.9 1004.8 1007.9 1017.1 1023.2 1020.5 1012.5 MAX. QFF PRESSURE IN HPA 1028.9 1031.4 1024.6 1018.6 1013.7 1014.2 1009.7 1009.9 1014.8 1023.5 1035.8 1028.5 1035.8 DAY 31 10 27 2 5 13 30 20 25 16 17 10 MIN. QFF PRESSURE IN HPA 1007.1 1011.5 1004.8 1001.1 997.9 994.9 996.7 998.0 999.0 1009.9 1014.0 1011.9 994.9 DAY 21 7 24 30 27 24 8 3 1 12 6 15 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 870.3 871.2 870.1 869.9 869.5 868.8 869.2 869.6 870.9 874.8 875.9 872.8 871.1 MAX. QFE PRESSURE IN HPA 877.7 878.9 877.5 875.2 875.2 873.3 873.9 873.2 875.9 879.1 883.6 879.6 883.6 DAY 24 29 26 2 5 3 30 23 29 15 17 4 MIN. QFE PRESSURE IN HPA 861.8 864.2 863.8 864.9 865.5 864.5 864.3 864.4 864.2 870.6 869.2 864.2 861.8 DAY 21 6 13 21 26 24 8 3 1 23 6 15 MEAN QNH PRESSURE IN HPA 1015.7 1016.7 1015.4 1015.2 1014.8 1014.0 1014.5 1014.9 1016.4 1020.8 1022.0 1018.5 1016.6 MAX. QNH PRESSURE IN HPA 1024.1 1025.4 1023.9 1021.2 1021.2 1019.1 1019.8 1019.0 1022.0 1025.7 1030.8 1026.2 1030.8 DAY 24 29 26 2 5 3 30 23 29 15 17 4 MIN. QNH PRESSURE IN HPA 1006.1 1008.8 1008.3 1009.6 1010.3 1009.1 1008.9 1009.0 1008.8 1016.0 1014.4 1008.8 1006.1 DAY 21 6 13 21 26 24 8 3 1 23 6 15 MEAN QFF PRESSURE IN HPA 1019.4 1020.6 1015.7 1009.5 1007.4 1005.6 1004.8 1005.2 1008.6 1017.5 1023.4 1020.7 1013.2 MAX. QFF PRESSURE IN HPA 1029.2 1030.6 1025.4 1020.4 1014.8 1016.8 1009.9 1009.8 1016.6 1025.2 1034.6 1028.2 1034.6 DAY 14 10 15 2 5 13 30 17 29 15 17 9 MIN. QFF PRESSURE IN HPA 1006.8 1011.7 1003.6 1000.7 1000.5 998.3 997.5 997.9 999.2 1011.2 1014.5 1010.4 997.5 DAY 20 7 24 21 31 24 8 3 1 12 6 15 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 870.1 870.9 869.6 869.6 869.3 868.6 869.0 869.3 870.7 874.6 875.7 872.6 870.8 MAX. QFE PRESSURE IN HPA 877.1 878.0 877.7 875.2 875.0 873.0 873.3 872.8 875.4 879.4 884.0 879.4 884.0 DAY 30 29 26 2 5 15 30 8 29 15 16 9 MIN. QFE PRESSURE IN HPA 861.5 863.1 863.0 866.0 865.0 864.5 865.2 864.5 864.0 870.0 869.3 864.0 861.5 DAY 20 6 24 30 26 24 14 30 1 17 6 15 MEAN QNH PRESSURE IN HPA 1015.4 1016.3 1015.0 1014.9 1014.5 1013.7 1014.2 1014.6 1016.1 1020.6 1021.8 1018.3 1016.3 MAX. QNH PRESSURE IN HPA 1023.4 1024.4 1024.1 1021.2 1021.0 1018.8 1019.1 1018.5 1021.5 1026.0 1031.2 1026.0 1031.2 DAY 30 29 26 2 5 15 30 8 29 15 16 9 MIN. QNH PRESSURE IN HPA 1005.7 1007.5 1007.4 1010.8 1009.7 1009.1 1009.9 1009.1 1008.6 1015.4 1014.6 1008.6 1005.7 DAY 20 6 24 30 26 24 14 30 1 17 6 15 MEAN QFF PRESSURE IN HPA 1018.1 1019.4 1014.5 1008.8 1006.6 1005.0 1004.3 1004.7 1007.7 1016.6 1022.3 1019.6 1012.3 MAX. QFF PRESSURE IN HPA 1030.0 1029.7 1026.6 1019.3 1014.4 1014.8 1008.9 1009.0 1015.1 1025.4 1034.3 1027.6 1034.3 DAY 30 10 15 2 5 13 25 18 29 15 16 9 MIN. QFF PRESSURE IN HPA 1005.6 1009.9 1001.5 1001.9 1000.1 998.4 998.4 998.1 997.9 1009.6 1015.2 1009.8 997.9 DAY 20 25 24 30 31 24 8 3 1 17 6 15 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 2001 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.4 3.0 8.0 15.4 20.5 23.2 24.3 24.0 19.6 13.5 8.5 4.7 13.7 MINIMUN AIR TEMPERATURE (C) -4.5 -1.9 1.7 9.0 13.2 15.5 17.0 15.9 11.9 7.2 3.4 0.5 7.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 13 8 4 0 0 0 0 0 0 0 0 1 26 DAYS WITH FREEZING MIN.<= 0 29 20 8 0 0 0 0 0 0 0 3 10 70 TEMPERATURE RECORDS LOWEST(C) -14.6 -9.8 -13.0 3.2 9.6 11.0 11.2 10.4 3.6 0.6 -3.0 -7.2 -14.6 DAY 30 1 12 19 8 2 30 14 21 12 20 23 MAXIMUM AIR TEMPERATURE (C) 5.2 9.3 15.4 23.3 28.5 30.9 31.1 32.1 27.9 21.0 15.2 10.1 20.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 8 18 26 25 11 0 0 0 88 DAYS WITH MAXIMUM TEMP. <= 0 7 0 1 0 0 0 0 0 0 0 0 0 8 TEMPERATURE RECORDS HIGHEST(C) 14.6 15.2 22.0 29.2 36.6 39.0 36.4 36.8 33.8 29.6 23.8 16.2 39.0 DAY 14 28 8 26 16 26 10 31 8 1 7 28 DIF. BETWEEN (MAX.-MIN.) (C) 9.7 11.2 13.7 14.3 15.3 15.4 14.1 16.2 16.0 13.8 11.8 9.6 13.4 MEAN DAILY TEMP. (MDT) (C) 0.3 3.7 8.5 16.1 20.8 23.2 24.1 24.0 19.9 14.1 9.3 5.3 14.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.5 29.0 77.8 98.5 98.2 25.5 0.8 0.0 0.0 331.3 HEATING DEG. DAYS(BASE 18 0C) 548.5 401.0 293.9 69.2 2.7 0.8 0.0 0.0 23.7 125.5 260.7 393.0 2118.9 DEWPOINT (MEAN C) -4.9 -3.2 0.8 6.8 8.1 8.7 7.3 7.4 3.1 3.5 1.1 0.7 3.3 MIXING RATIO (G/KG) 3.14 3.57 4.84 7.26 7.96 8.48 7.70 7.77 5.92 5.92 4.88 4.70 6.01 VAPOUR PRESSURE (HPA) 4.38 4.97 6.71 10.02 10.96 11.66 10.60 10.72 8.20 8.22 6.79 6.55 8.31 SATURATION DEF. (HPA) 1.99 3.04 5.08 8.58 14.51 18.41 20.91 20.50 16.08 8.31 4.97 2.33 10.39 RELATIVE HUMIDITY (MEAN %) 75 68 65 60 49 44 38 39 37 56 64 78 56 RELATIVE HUMIDITY (MAX. %) 88 86 85 84 73 65 57 60 57 77 84 90 76 RELATIVE HUMIDITY (MIN. %) 57 46 42 36 29 28 22 21 21 34 41 59 36 RELATIVE HUMIDITY (MEAN% 03UTC) 85 81 80 78 65 59 55 55 51 73 79 87 71 RELATIVE HUMIDITY (MEAN% 09UTC) 63 52 49 42 32 31 25 25 24 39 48 64 41 RELATIVE HUMIDITY (MEAN% 15UTC) 72 62 57 49 40 33 27 28 31 49 60 76 49 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 13.9 25.7 67.4 13.4 8.9 0.0 0.1 0.1 0.0 8.4 25.2 71.1 234.2 DAYS WITH PRECIPITATION >=10 0 1 3 0 0 0 0 0 0 0 1 3 8 DAYS WITH PRECIPITATION >= 5 1 2 4 0 1 0 0 0 0 1 2 4 15 DAYS WITH PRECIPITATION >= 1 4 3 6 5 2 0 0 0 0 2 4 9 35 DAYS WITH PRECIPITATION 7 7 7 7 3 1 4 2 0 3 8 12 61 GREATEST DAILY PRECIPITATION 6.9 16.0 21.0 4.0 6.3 0.0 0.1 0.1 0.0 5.0 13.4 22.0 22.0 DAY 24 19 11 10 6 ** 18 12 ** 23 8 21 DAY WITH THUNDER STORM 0 0 1 2 3 0 0 0 0 0 0 1 7 DAYS WITH SNOW OR SLEET 7 3 4 0 0 0 0 0 0 0 1 6 21 DAYS WITH DUST 0 1 0 0 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 135 135 315 135 135 45 45 45 135 135 315 135 135 PREVAILING WIND SPEED(KNOTS) 4.5 4.6 5.3 5.0 4.8 5.6 6.1 5.6 5.0 5.1 5.3 5.2 4.9 PREVAILING WIND PERCENT 12.5 12.9 16.1 19.2 10.5 15.5 17.1 14.5 25.0 21.0 10.0 13.3 13.6 CALMS PERCENT OF WIND 73.0 63.4 59.3 45.8 47.6 39.7 45.3 42.7 38.3 41.9 63.3 74.6 52.9 NO. OF WIND OBSERVATION 248 224 248 240 248 239 245 248 240 248 240 248 2916 VECTOR WIND DIRECTION (MEAN) 154 193 256 124 131 58 74 71 109 153 220 138 106 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.4 0.5 0.7 0.3 1.2 1.7 1.1 1.6 0.7 0.4 0.6 0.5 WIND STEADINESES (MEAN %) 16.7 22.2 23.8 25.9 11.1 40.0 56.7 36.7 50.0 22.6 22.2 46.2 20.8 WIND SPEED (MEAN KNOTS) 1.2 1.8 2.1 2.7 2.7 3.0 3.0 3.0 3.2 3.1 1.8 1.3 2.4 FASTEST WIND DIRECTION 140 160 320 160 250 70 60 300 60 300 310 150 250 FASTEST WIND SPEED (KNOTS) 10 12 14 12 29 12 14 12 12 14 12 12 29 DAY 24 16 9 5 11 28 13 17 2 26 19 4 DAYS WITH SKY CLEAR (0-2)/8 15 16 17 12 15 22 28 28 25 20 14 9 221 DAYS WITH P.CLOUDY (3-6)/8 8 8 9 17 15 8 3 3 5 8 13 15 112 DAYS WITH CLOUDY (7-8)/8 8 4 5 1 1 0 0 0 0 3 3 7 32 DAYS WITH VISIBILITY =< 2 KM 4 1 5 1 0 1 0 0 0 0 0 9 21 DURATION OF SUNSHINE HOURS 147.4 200.4 219.3 247.9 294.8 331.4 356.4 332.2 295.9 235.5 176.9 135.7 2973.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 873.5 870.3 869.9 869.4 868.1 867.3 867.6 869.2 871.1 873.2 872.5 873.6 870.5 MAX. QFE PRESSURE IN HPA 878.8 882.6 880.0 880.4 873.5 874.9 872.0 875.1 878.4 882.2 878.7 879.9 882.6 DAY-HOUR 26- 6 9-18 1-18 1-21 17-21 2- 3 29- 3 5- 6 22- 6 10-18 2- 6 10- 6 MIN. QFE PRESSURE IN HPA 867.9 853.6 860.2 860.2 859.3 859.6 861.1 860.2 864.6 865.8 861.8 865.4 853.6 DAY-HOUR 4-12 21-12 26- 3 12-21 30- 9 6-15 18-15 31-12 8-12 31-12 17-12 5-12 MEAN QNH PRESSURE IN HPA 1019.4 1015.7 1015.2 1014.7 1013.2 1012.3 1012.7 1014.5 1016.6 1019.0 1018.2 1019.4 1015.9 MAX. QNH PRESSURE IN HPA 1025.3 1029.6 1026.7 1027.1 1019.3 1020.9 1017.6 1021.1 1024.9 1029.2 1025.2 1026.6 1029.6 DAY-HOUR 26- 6 9-18 1-18 1-21 17-21 2- 3 29- 3 5- 6 22- 6 10-18 2- 6 10- 6 MIN. QNH PRESSURE IN HPA 1013.0 996.8 1004.2 1004.2 1003.2 1003.6 1005.3 1004.2 1009.2 1010.6 1006.1 1010.1 996.8 DAY-HOUR 4-12 21-12 26- 3 12-21 30- 9 6-15 18-15 31-12 8-12 31-12 17-12 5-12 MEAN QFF PRESSURE IN HPA 1023.4 1017.7 1014.3 1009.6 1005.4 1003.1 1003.0 1005.0 1009.5 1015.0 1017.0 1020.4 1011.9 MAX. QFF PRESSURE IN HPA 1033.7 1033.9 1030.9 1025.8 1014.6 1015.1 1009.5 1012.5 1022.5 1029.3 1029.0 1030.1 1033.9 DAY-HOUR 26- 6 9-18 12- 3 1-18 19- 3 2- 3 30- 3 13- 3 22- 3 27-18 20- 6 22-18 MIN. QFF PRESSURE IN HPA 1013.5 994.5 999.2 997.7 992.3 993.3 995.9 992.4 998.5 1005.6 1001.7 1009.2 992.3 DAY-HOUR 4-12 21-12 24-12 12-21 30- 9 6-15 10-15 31-12 1- 0 1- 9 19- 0 5-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 873.4 870.0 869.7 869.6 868.3 867.5 867.9 869.5 871.0 873.3 872.1 873.5 870.5 MAX. QFE PRESSURE IN HPA 877.5 882.0 879.7 879.4 872.7 874.1 871.7 874.6 876.8 881.0 876.9 878.9 882.0 DAY 26 10 2 2 19 2 29 5 20 11 5 10 MIN. QFE PRESSURE IN HPA 869.0 857.5 860.4 861.8 861.0 861.0 862.0 863.7 865.6 867.1 862.4 866.8 857.5 DAY 1 22 26 13 9 7 19 31 1 25 19 6 MEAN QNH PRESSURE IN HPA 1019.2 1015.3 1015.0 1014.9 1013.4 1012.5 1013.0 1014.8 1016.5 1019.1 1017.7 1019.3 1015.9 MAX. QNH PRESSURE IN HPA 1023.9 1029.0 1026.4 1026.0 1018.4 1020.0 1017.3 1020.6 1023.1 1027.8 1023.2 1025.4 1029.0 DAY 26 10 2 2 19 2 29 5 20 11 5 10 MIN. QNH PRESSURE IN HPA 1014.2 1001.2 1004.5 1006.1 1005.2 1005.2 1006.3 1008.2 1010.4 1012.1 1006.7 1011.7 1001.2 DAY 1 22 26 13 9 7 19 31 1 25 19 6 MEAN QFF PRESSURE IN HPA 1022.6 1016.9 1013.7 1009.4 1005.6 1003.4 1003.3 1005.1 1009.1 1014.6 1016.0 1019.9 1011.6 MAX. QFF PRESSURE IN HPA 1031.1 1033.0 1029.6 1023.6 1011.8 1013.7 1008.0 1011.3 1020.4 1026.9 1026.5 1028.4 1033.0 DAY 25 10 12 2 19 2 30 14 20 28 20 23 MIN. QFF PRESSURE IN HPA 1013.7 1000.5 1000.3 999.0 996.8 994.1 997.2 997.7 998.5 1006.7 1001.7 1009.8 994.1 DAY 1 22 24 13 30 7 11 31 1 25 19 6 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 873.5 870.2 870.2 870.1 869.0 868.1 868.5 870.1 871.7 873.7 872.6 873.5 870.9 MAX. QFE PRESSURE IN HPA 877.5 881.3 879.9 878.4 873.4 874.9 872.0 875.0 877.8 880.6 877.7 878.7 881.3 DAY 26 10 2 2 23 2 29 5 22 11 20 10 MIN. QFE PRESSURE IN HPA 869.0 858.0 860.2 863.2 860.7 861.6 862.8 864.0 866.1 867.7 864.0 867.2 858.0 DAY 1 21 26 13 9 18 19 31 5 25 19 5 MEAN QNH PRESSURE IN HPA 1019.3 1015.6 1015.6 1015.5 1014.3 1013.2 1013.7 1015.5 1017.2 1019.6 1018.3 1019.3 1016.4 MAX. QNH PRESSURE IN HPA 1023.9 1028.2 1026.6 1024.9 1019.2 1020.9 1017.6 1021.0 1024.2 1027.4 1024.1 1025.2 1028.2 DAY 26 10 2 2 23 2 29 5 22 11 20 10 MIN. QNH PRESSURE IN HPA 1014.2 1001.8 1004.2 1007.6 1004.8 1005.8 1007.2 1008.6 1010.9 1012.8 1008.6 1012.2 1001.8 DAY 1 21 26 13 9 18 19 31 5 25 19 5 MEAN QFF PRESSURE IN HPA 1024.0 1018.5 1015.5 1011.1 1007.2 1004.5 1004.5 1006.8 1011.1 1016.5 1018.0 1021.0 1013.2 MAX. QFF PRESSURE IN HPA 1032.3 1032.4 1030.9 1023.5 1014.6 1015.1 1009.5 1012.5 1022.5 1028.1 1028.8 1028.2 1032.4 DAY 26 10 12 2 19 2 30 13 22 11 20 22 MIN. QFF PRESSURE IN HPA 1016.3 1001.3 1001.2 1001.8 996.5 995.6 998.7 998.7 1001.6 1009.0 1005.6 1010.8 995.6 DAY 5 21 24 13 30 7 10 31 1 25 18 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 874.3 871.0 870.8 870.4 868.9 868.0 868.3 870.2 872.1 874.1 873.4 874.4 871.3 MAX. QFE PRESSURE IN HPA 878.8 882.1 880.0 879.2 873.2 874.6 872.0 875.1 878.4 881.8 878.7 879.9 882.1 DAY 26 10 2 1 18 2 29 5 22 10 2 10 MIN. QFE PRESSURE IN HPA 870.8 857.0 862.5 865.6 861.4 861.6 863.1 863.7 866.2 868.4 864.7 867.6 857.0 DAY 1 21 24 13 9 18 19 27 5 31 18 5 MEAN QNH PRESSURE IN HPA 1020.3 1016.5 1016.3 1015.8 1014.1 1013.1 1013.5 1015.5 1017.7 1020.0 1019.2 1020.4 1016.9 MAX. QNH PRESSURE IN HPA 1025.3 1029.1 1026.7 1025.8 1019.0 1020.6 1017.6 1021.1 1024.9 1028.7 1025.2 1026.6 1029.1 DAY 26 10 2 1 18 2 29 5 22 10 2 10 MIN. QNH PRESSURE IN HPA 1016.3 1000.6 1006.9 1010.4 1005.6 1005.8 1007.5 1008.2 1011.0 1013.5 1009.3 1012.6 1000.6 DAY 1 21 24 13 9 18 19 27 5 31 18 5 MEAN QFF PRESSURE IN HPA 1024.7 1018.9 1015.7 1010.9 1006.3 1003.8 1003.7 1006.0 1010.6 1016.1 1018.1 1021.9 1013.1 MAX. QFF PRESSURE IN HPA 1033.7 1033.3 1029.2 1024.9 1013.0 1013.8 1007.9 1011.1 1021.7 1028.1 1029.0 1029.1 1033.7 DAY 26 10 11 1 19 2 30 13 22 27 20 22 MIN. QFF PRESSURE IN HPA 1017.6 998.5 1001.3 1004.4 995.8 995.4 998.0 997.3 1001.6 1007.7 1004.7 1013.4 995.4 DAY 4 21 24 26 30 18 11 31 5 25 18 20 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 873.3 870.3 869.8 869.1 867.7 866.8 867.3 868.9 870.8 872.7 872.2 873.3 870.2 MAX. QFE PRESSURE IN HPA 878.2 881.6 878.2 879.1 871.8 873.9 871.4 873.9 876.8 880.8 877.9 878.6 881.6 DAY 26 9 1 1 18 2 29 5 22 10 2 10 MIN. QFE PRESSURE IN HPA 869.3 855.3 861.2 864.2 859.3 860.7 861.6 861.3 865.5 866.3 863.3 866.2 855.3 DAY 4 21 24 12 30 18 18 27 8 31 17 5 MEAN QNH PRESSURE IN HPA 1019.1 1015.7 1015.2 1014.4 1012.7 1011.8 1012.2 1014.1 1016.2 1018.4 1017.8 1019.1 1015.6 MAX. QNH PRESSURE IN HPA 1024.7 1028.5 1024.7 1025.7 1017.4 1019.8 1016.9 1019.8 1023.1 1027.6 1024.3 1025.1 1028.5 DAY 26 9 1 1 18 2 29 5 22 10 2 10 MIN. QNH PRESSURE IN HPA 1014.6 998.7 1005.4 1008.8 1003.2 1004.8 1005.8 1005.5 1010.3 1011.2 1007.8 1011.0 998.7 DAY 4 21 24 12 30 18 18 27 8 31 17 5 MEAN QFF PRESSURE IN HPA 1022.6 1017.2 1013.7 1008.7 1004.5 1002.1 1002.2 1004.1 1008.4 1013.9 1016.0 1019.5 1011.1 MAX. QFF PRESSURE IN HPA 1031.8 1032.6 1028.6 1023.6 1010.9 1012.6 1007.0 1009.5 1019.2 1027.4 1026.6 1027.2 1032.6 DAY 26 9 11 1 1 2 29 13 22 27 20 10 MIN. QFF PRESSURE IN HPA 1014.4 995.6 999.6 1002.0 992.3 994.3 996.0 994.3 999.9 1005.6 1003.4 1009.9 992.3 DAY 4 21 24 26 30 18 11 31 8 1 17 20 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 872.6 869.4 868.6 868.1 866.6 866.0 866.5 867.8 869.7 871.9 871.6 872.8 869.3 MAX. QFE PRESSURE IN HPA 877.1 880.9 876.5 877.9 870.8 872.0 870.9 872.3 875.1 880.2 877.7 878.1 880.9 DAY 16 9 1 1 19 2 29 5 22 10 2 9 MIN. QFE PRESSURE IN HPA 867.9 853.6 860.6 862.4 860.0 859.9 861.2 860.2 864.6 865.8 861.8 865.4 853.6 DAY 4 21 25 12 8 6 18 31 8 31 17 5 MEAN QNH PRESSURE IN HPA 1018.4 1014.7 1013.8 1013.2 1011.5 1010.9 1011.4 1012.9 1015.1 1017.5 1017.2 1018.5 1014.6 MAX. QNH PRESSURE IN HPA 1023.4 1027.7 1022.7 1024.3 1016.3 1017.6 1016.4 1018.0 1021.1 1026.9 1024.1 1024.5 1027.7 DAY 16 9 1 1 19 2 29 5 22 10 2 9 MIN. QNH PRESSURE IN HPA 1013.0 996.8 1004.7 1006.7 1004.0 1003.9 1005.4 1004.2 1009.2 1010.6 1006.1 1010.1 996.8 DAY 4 21 25 12 8 6 18 31 8 31 17 5 MEAN QFF PRESSURE IN HPA 1021.8 1016.0 1012.3 1007.7 1003.5 1001.7 1001.8 1003.2 1007.6 1013.2 1015.5 1019.0 1010.3 MAX. QFF PRESSURE IN HPA 1031.3 1031.3 1027.4 1021.7 1010.1 1010.4 1007.1 1009.1 1017.0 1027.1 1026.2 1026.4 1031.3 DAY 25 9 11 1 19 2 29 13 22 27 20 22 MIN. QFF PRESSURE IN HPA 1013.5 994.5 999.2 1000.5 996.3 993.5 996.3 992.4 998.7 1005.8 1001.9 1009.3 992.4 DAY 4 21 24 12 9 6 11 31 8 1 17 20 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 873.4 870.1 869.3 868.6 867.2 866.6 866.7 868.3 870.5 872.7 872.5 873.6 870.0 MAX. QFE PRESSURE IN HPA 877.6 882.1 878.6 879.0 872.7 872.4 870.9 872.7 875.4 881.8 878.0 878.6 882.1 DAY 26 9 1 1 18 2 29 5 22 10 2 9 MIN. QFE PRESSURE IN HPA 869.0 854.2 860.9 861.9 861.1 859.6 861.1 862.4 866.2 867.6 863.4 866.2 854.2 DAY 4 21 24 12 9 6 18 31 5 6 17 5 MEAN QNH PRESSURE IN HPA 1019.3 1015.4 1014.6 1013.8 1012.2 1011.5 1011.6 1013.5 1015.9 1018.4 1018.2 1019.5 1015.3 MAX. QNH PRESSURE IN HPA 1024.0 1029.1 1025.1 1025.6 1018.4 1018.1 1016.4 1018.4 1021.5 1028.7 1024.4 1025.1 1029.1 DAY 26 9 1 1 18 2 29 5 22 10 2 9 MIN. QNH PRESSURE IN HPA 1014.2 997.4 1005.0 1006.2 1005.3 1003.6 1005.3 1006.7 1011.0 1012.6 1007.9 1011.0 997.4 DAY 4 21 24 12 9 6 18 31 5 6 17 5 MEAN QFF PRESSURE IN HPA 1024.0 1018.1 1014.3 1009.2 1005.0 1002.6 1002.6 1004.8 1009.7 1015.4 1017.9 1021.1 1012.1 MAX. QFF PRESSURE IN HPA 1032.6 1033.1 1029.7 1024.1 1013.6 1011.0 1008.0 1010.3 1019.2 1028.5 1027.2 1028.6 1033.1 DAY 25 9 11 1 18 2 29 12 21 27 20 22 MIN. QFF PRESSURE IN HPA 1015.7 996.8 1000.3 1000.5 997.1 993.3 995.9 996.9 1002.4 1008.0 1004.7 1010.8 993.3 DAY 4 21 24 12 29 6 10 31 5 1 17 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 874.0 870.7 870.4 869.9 868.6 868.0 868.1 869.8 871.8 873.7 873.1 873.9 871.0 MAX. QFE PRESSURE IN HPA 878.0 882.6 880.0 880.2 873.5 874.0 871.4 874.0 876.9 882.2 878.1 878.6 882.6 DAY 25 9 1 1 18 1 29 5 19 10 2 9 MIN. QFE PRESSURE IN HPA 869.2 854.7 861.5 861.9 862.2 861.6 862.9 864.8 867.7 868.2 864.1 866.2 854.7 DAY 18 21 25 12 9 6 18 30 7 31 18 5 MEAN QNH PRESSURE IN HPA 1019.9 1016.2 1015.8 1015.3 1013.7 1013.1 1013.2 1015.1 1017.4 1019.5 1018.8 1019.8 1016.5 MAX. QNH PRESSURE IN HPA 1024.4 1029.6 1026.7 1026.9 1019.3 1019.9 1016.9 1019.9 1023.2 1029.2 1024.5 1025.1 1029.6 DAY 25 9 1 1 18 1 29 5 19 10 2 9 MIN. QNH PRESSURE IN HPA 1014.4 998.0 1005.7 1006.2 1006.5 1005.8 1007.3 1009.5 1012.8 1013.3 1008.7 1011.0 998.0 DAY 18 21 25 12 9 6 18 30 7 31 18 5 MEAN QFF PRESSURE IN HPA 1024.4 1018.4 1015.2 1010.4 1005.8 1003.8 1003.5 1005.6 1010.4 1015.7 1017.8 1021.2 1012.7 MAX. QFF PRESSURE IN HPA 1033.5 1033.9 1030.5 1025.8 1014.2 1013.6 1008.1 1011.3 1020.4 1029.3 1026.2 1030.1 1033.9 DAY 25 9 11 1 18 1 29 12 21 27 20 22 MIN. QFF PRESSURE IN HPA 1016.5 996.1 1000.7 1000.8 997.7 995.0 997.0 998.5 1002.8 1008.1 1003.7 1010.6 995.0 DAY 4 21 24 12 9 6 10 31 5 6 18 5 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 873.8 870.6 870.2 869.8 868.3 867.7 867.9 869.5 871.5 873.6 872.7 873.6 870.8 MAX. QFE PRESSURE IN HPA 878.0 882.3 879.7 880.4 873.5 873.9 871.4 873.6 876.8 881.7 877.3 878.7 882.3 DAY 25 9 1 1 17 1 29 5 19 10 2 9 MIN. QFE PRESSURE IN HPA 869.5 857.3 860.5 860.2 861.6 861.2 862.1 864.0 866.8 867.8 863.1 866.4 857.3 DAY 4 21 25 12 8 6 18 30 4 31 18 5 MEAN QNH PRESSURE IN HPA 1019.6 1016.1 1015.6 1015.2 1013.5 1012.8 1013.0 1014.8 1017.1 1019.4 1018.4 1019.4 1016.2 MAX. QNH PRESSURE IN HPA 1024.4 1029.3 1026.4 1027.1 1019.3 1019.8 1016.9 1019.4 1023.1 1028.6 1023.6 1025.2 1029.3 DAY 25 9 1 1 17 1 29 5 19 10 2 9 MIN. QNH PRESSURE IN HPA 1014.8 1001.0 1004.6 1004.2 1005.8 1005.4 1006.4 1008.6 1011.7 1012.9 1007.5 1011.3 1001.0 DAY 4 21 25 12 8 6 18 30 4 31 18 5 MEAN QFF PRESSURE IN HPA 1023.2 1017.5 1014.1 1009.5 1005.2 1003.1 1002.9 1004.7 1009.4 1015.0 1016.7 1019.8 1011.8 MAX. QFF PRESSURE IN HPA 1031.8 1033.5 1030.0 1025.3 1013.0 1012.9 1008.2 1010.7 1019.3 1028.1 1025.3 1029.3 1033.5 DAY 25 9 11 1 18 1 29 12 21 27 19 22 MIN. QFF PRESSURE IN HPA 1014.9 999.7 999.3 997.7 997.5 994.2 996.0 997.4 1002.4 1006.9 1001.9 1009.2 994.2 DAY 4 21 25 12 29 6 10 30 4 6 18 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 2002 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 1.8 2.7 9.0 11.6 16.1 22.0 24.0 25.0 20.8 16.7 7.7 -0.6 13.1 MINIMUN AIR TEMPERATURE (C) -1.8 -1.2 2.3 6.9 10.4 14.5 16.0 17.1 12.1 9.4 3.3 -4.8 7.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 1 0 0 0 0 2 DAYS WITH MINIMUM TEMP. <=-4 14 7 3 0 0 0 0 0 0 0 0 20 44 DAYS WITH FREEZING MIN.<= 0 21 18 10 0 0 0 0 0 0 0 8 27 84 TEMPERATURE RECORDS LOWEST(C) -10.0 -8.0 -7.2 2.0 5.4 10.0 11.8 11.0 8.0 4.4 -3.0 -12.2 -12.2 DAY 16 2 11 6 18 8 23 15 8 25 30 4 MAXIMUM AIR TEMPERATURE (C) 6.7 8.1 17.3 17.4 22.5 29.6 30.9 32.9 30.0 25.3 13.8 4.4 19.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 4 15 17 27 11 4 0 0 78 DAYS WITH MAXIMUM TEMP. <= 0 2 2 0 0 0 0 0 0 0 0 0 6 10 TEMPERATURE RECORDS HIGHEST(C) 17.8 18.0 26.4 28.2 33.0 36.4 37.0 38.6 36.2 31.4 21.4 12.6 38.6 DAY 3 13 27 18 25 13 18 10 12 3 12 8 DIF. BETWEEN (MAX.-MIN.) (C) 8.5 9.3 15.0 10.5 12.1 15.1 14.9 15.8 17.9 15.9 10.5 9.2 12.9 MEAN DAILY TEMP. (MDT) (C) 2.5 3.5 9.8 12.1 16.5 22.1 23.5 25.0 21.1 17.3 8.6 -0.2 13.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 6.1 53.9 78.8 125.0 24.1 2.5 0.0 0.0 290.4 HEATING DEG. DAYS(BASE 18 0C) 481.7 406.7 254.6 183.0 75.3 1.6 0.0 0.0 0.3 47.4 283.4 563.5 2297.5 DEWPOINT (MEAN C) -2.8 -2.1 -1.2 5.4 8.7 7.7 6.5 6.8 2.1 4.4 1.8 -5.5 2.7 MIXING RATIO (G/KG) 3.70 3.86 4.22 6.65 8.29 7.85 7.30 7.61 5.44 6.21 5.19 3.09 5.78 VAPOUR PRESSURE (HPA) 5.15 5.36 5.85 9.17 11.42 10.81 10.07 10.47 7.55 8.64 7.23 4.30 8.00 SATURATION DEF. (HPA) 2.40 2.58 6.78 5.36 7.97 17.14 21.06 22.75 18.70 11.64 3.79 1.92 10.18 RELATIVE HUMIDITY (MEAN %) 74 74 55 71 65 44 37 35 32 49 70 72 57 RELATIVE HUMIDITY (MAX. %) 87 90 79 91 84 67 57 55 48 70 88 86 75 RELATIVE HUMIDITY (MIN. %) 57 54 31 48 45 25 22 20 17 28 47 54 37 RELATIVE HUMIDITY (MEAN% 03UTC) 83 83 73 86 78 59 52 51 45 65 84 78 70 RELATIVE HUMIDITY (MEAN% 09UTC) 63 61 38 54 52 29 23 23 21 32 50 60 42 RELATIVE HUMIDITY (MEAN% 15UTC) 73 72 45 64 58 33 27 27 25 44 66 74 51 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 26.0 33.4 27.4 81.3 73.8 2.1 4.2 0.0 0.0 4.0 39.7 39.9 331.8 DAYS WITH PRECIPITATION >=10 1 0 1 4 2 0 0 0 0 0 2 1 11 DAYS WITH PRECIPITATION >= 5 1 4 1 8 6 0 0 0 0 0 2 4 26 DAYS WITH PRECIPITATION >= 1 6 5 6 9 8 1 2 0 0 1 5 6 49 DAYS WITH PRECIPITATION 9 15 11 19 13 5 3 0 0 3 6 11 95 GREATEST DAILY PRECIPITATION 13.0 8.0 13.0 12.0 31.0 2.0 3.0 0.0 0.0 4.0 20.0 11.0 31.0 DAY 12 17 23 12 4 15 28 ** ** 23 3 11 DAY WITH THUNDER STORM 0 1 1 5 6 3 1 0 0 2 0 1 20 DAYS WITH SNOW OR SLEET 8 13 3 0 0 0 0 0 0 0 0 8 32 DAYS WITH DUST 0 0 0 1 0 0 0 0 0 2 0 0 3 WIND DIRECTION (PREVAILING) 135 315 135 135 135 315 45 90 90 135 135 315 135 PREVAILING WIND SPEED(KNOTS) 7.1 6.5 6.2 6.1 5.8 5.8 5.7 5.6 4.2 5.1 4.8 5.3 5.8 PREVAILING WIND PERCENT 11.7 21.0 16.1 21.7 21.0 18.3 18.5 14.9 12.5 9.3 7.5 6.5 11.5 CALMS PERCENT OF WIND 60.9 54.0 49.2 34.6 33.9 45.0 50.8 51.2 67.5 76.6 79.2 78.6 56.8 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 194 281 201 211 147 7 54 82 92 147 172 217 121 VECTOR WIND MAGNITUDE(KNOTS) 0.7 0.7 0.5 0.8 0.8 0.5 1.5 1.5 0.9 0.5 0.2 0.2 0.3 WIND STEADINESES (MEAN %) 30.4 24.1 16.1 21.1 22.2 16.1 60.0 53.6 60.0 41.7 22.2 16.7 12.5 WIND SPEED (MEAN KNOTS) 2.3 2.9 3.1 3.8 3.6 3.1 2.5 2.8 1.5 1.2 0.9 1.2 2.4 FASTEST WIND DIRECTION 130 340 140 270 150 100 60 90 70 320 240 320 140 FASTEST WIND SPEED (KNOTS) 16 16 29 14 12 14 10 14 8 16 8 12 29 DAY 5 28 18 16 10 16 2 9 2 22 12 14 DAYS WITH SKY CLEAR (0-2)/8 11 9 12 4 13 23 25 31 30 25 12 13 208 DAYS WITH P.CLOUDY (3-6)/8 13 8 10 13 11 6 5 0 0 5 11 4 86 DAYS WITH CLOUDY (7-8)/8 7 11 9 13 7 1 1 0 0 1 7 14 71 DAYS WITH VISIBILITY =< 2 KM 1 6 2 5 2 0 0 0 0 1 3 6 26 DURATION OF SUNSHINE HOURS 149.7 145.3 205.2 150.6 262.5 331.5 349.2 355.8 320.7 259.2 165.5 113.0 2808.2 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.8 870.9 869.7 867.6 869.2 867.4 868.7 867.8 872.0 873.4 874.5 871.8 870.4 MAX. QFE PRESSURE IN HPA 879.3 881.2 882.8 876.2 875.7 875.2 873.7 874.9 877.9 878.9 882.4 883.7 883.7 DAY-HOUR 27-18 19- 6 10-18 1- 6 17- 6 24-21 3- 3 31- 3 21- 6 11- 6 18- 6 3-18 MIN. QFE PRESSURE IN HPA 860.6 861.4 860.1 853.8 862.2 858.0 861.1 860.6 866.4 866.9 865.0 858.3 853.8 DAY-HOUR 8- 9 25-12 28-15 3-21 12-12 20-12 24-12 17-12 10-12 21-12 12-12 22- 3 MEAN QNH PRESSURE IN HPA 1017.4 1016.4 1015.0 1012.6 1014.4 1012.4 1013.9 1012.9 1017.6 1019.2 1020.5 1017.4 1015.8 MAX. QNH PRESSURE IN HPA 1025.9 1028.0 1029.9 1022.4 1021.8 1021.2 1019.5 1020.9 1024.3 1025.4 1029.4 1030.9 1030.9 DAY-HOUR 27-18 19- 6 10-18 1- 6 17- 6 24-21 3- 3 31- 3 21- 6 11- 6 18- 6 3-18 MIN. QNH PRESSURE IN HPA 1004.7 1005.6 1004.1 997.0 1006.5 1001.8 1005.3 1004.7 1011.3 1011.8 1009.7 1002.1 997.0 DAY-HOUR 8- 9 25-12 28-15 3-21 12-12 20-12 24-12 17-12 10-12 21-12 12-12 22- 3 MEAN QFF PRESSURE IN HPA 1020.1 1018.5 1013.7 1009.5 1008.9 1003.9 1004.4 1002.9 1009.9 1013.6 1019.8 1021.5 1012.2 MAX. QFF PRESSURE IN HPA 1030.6 1033.2 1035.0 1021.6 1018.7 1014.1 1012.3 1013.9 1018.3 1021.7 1031.5 1040.1 1040.1 DAY-HOUR 27-15 19- 6 11- 3 1- 6 17- 9 25- 3 3- 3 31- 3 30- 3 23- 6 18- 6 4- 6 MIN. QFF PRESSURE IN HPA 1000.2 1003.3 996.3 992.8 999.3 991.3 995.8 993.8 1001.9 1005.5 1005.8 1000.4 991.3 DAY-HOUR 8- 9 27- 0 28-21 3-21 12-12 20-12 24-12 17-12 11-12 22- 9 12-12 22- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 871.7 870.4 869.4 867.5 869.0 867.5 868.5 867.8 872.0 873.5 874.4 871.6 870.3 MAX. QFE PRESSURE IN HPA 878.2 880.6 881.1 875.0 875.0 874.4 872.4 873.0 876.5 877.4 881.3 882.9 882.9 DAY 26 19 11 1 17 25 3 31 21 11 18 4 MIN. QFE PRESSURE IN HPA 863.3 861.9 860.3 855.4 864.6 859.6 862.6 862.9 868.2 867.8 866.5 858.8 855.4 DAY 8 27 29 4 5 21 25 16 18 22 12 22 MEAN QNH PRESSURE IN HPA 1017.3 1015.9 1014.7 1012.5 1014.2 1012.5 1013.6 1012.9 1017.6 1019.3 1020.4 1017.1 1015.7 MAX. QNH PRESSURE IN HPA 1024.7 1027.4 1027.9 1021.0 1021.0 1020.3 1018.1 1018.8 1022.7 1023.7 1028.2 1030.0 1030.0 DAY 26 19 11 1 17 25 3 31 21 11 18 4 MIN. QNH PRESSURE IN HPA 1007.8 1006.2 1004.4 998.8 1009.2 1003.6 1007.0 1007.3 1013.3 1012.9 1011.4 1002.7 998.8 DAY 8 27 29 4 5 21 25 16 18 22 12 22 MEAN QFF PRESSURE IN HPA 1019.4 1017.7 1013.0 1009.2 1008.6 1003.9 1004.4 1002.8 1009.6 1013.3 1019.2 1020.9 1011.8 MAX. QFF PRESSURE IN HPA 1027.8 1032.5 1033.9 1020.3 1017.3 1013.2 1010.2 1009.7 1015.4 1018.2 1029.8 1037.8 1037.8 DAY 26 19 11 1 18 25 3 31 30 23 18 4 MIN. QFF PRESSURE IN HPA 1002.8 1003.3 997.3 996.6 1000.6 993.2 997.2 996.2 1005.0 1007.0 1007.1 1000.4 993.2 DAY 8 27 29 4 30 21 25 9 12 22 13 22 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 871.8 870.6 870.0 867.9 869.5 868.4 869.3 868.8 872.7 874.0 874.8 871.5 870.8 MAX. QFE PRESSURE IN HPA 878.3 880.8 881.5 875.6 875.6 875.0 873.7 874.9 877.6 878.5 881.5 882.2 882.2 DAY 26 19 11 1 17 25 3 31 21 11 18 4 MIN. QFE PRESSURE IN HPA 861.9 862.2 860.3 856.0 864.9 861.1 863.6 863.0 868.5 868.3 866.4 858.3 856.0 DAY 8 27 29 4 12 20 25 17 18 22 12 22 MEAN QNH PRESSURE IN HPA 1017.4 1016.0 1015.3 1013.0 1014.8 1013.5 1014.6 1013.9 1018.4 1019.8 1020.8 1017.1 1016.2 MAX. QNH PRESSURE IN HPA 1024.8 1027.6 1028.4 1021.7 1021.7 1021.0 1019.5 1020.9 1024.0 1025.0 1028.4 1029.2 1029.2 DAY 26 19 11 1 17 25 3 31 21 11 18 4 MIN. QNH PRESSURE IN HPA 1006.2 1006.5 1004.4 999.5 1009.6 1005.3 1008.1 1007.4 1013.7 1013.4 1011.3 1002.1 999.5 DAY 8 27 29 4 12 20 25 17 18 22 12 22 MEAN QFF PRESSURE IN HPA 1020.6 1018.7 1014.7 1010.5 1009.7 1005.3 1005.5 1004.6 1011.9 1015.5 1020.8 1021.9 1013.3 MAX. QFF PRESSURE IN HPA 1029.2 1033.0 1035.0 1021.6 1018.2 1014.1 1012.3 1013.9 1018.3 1020.5 1031.1 1039.3 1039.3 DAY 18 19 11 1 17 25 3 31 30 23 18 4 MIN. QFF PRESSURE IN HPA 1001.8 1004.0 998.2 997.7 1002.2 995.7 998.6 997.5 1006.8 1009.1 1008.4 1000.8 995.7 DAY 8 27 29 4 30 20 25 17 12 22 13 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 872.8 871.4 870.7 868.2 869.8 868.2 869.4 868.7 873.0 874.4 875.5 872.7 871.2 MAX. QFE PRESSURE IN HPA 878.8 881.2 882.4 876.2 875.7 874.2 873.7 873.6 877.9 878.9 882.4 883.4 883.4 DAY 26 19 11 1 17 25 3 31 21 11 18 3 MIN. QFE PRESSURE IN HPA 862.3 862.8 861.8 855.8 865.3 860.8 863.7 862.9 868.5 869.0 866.9 861.1 855.8 DAY 8 27 21 4 12 20 24 17 18 22 12 22 MEAN QNH PRESSURE IN HPA 1018.5 1017.0 1016.2 1013.3 1015.2 1013.3 1014.7 1013.8 1018.7 1020.4 1021.6 1018.4 1016.7 MAX. QNH PRESSURE IN HPA 1025.3 1028.0 1029.4 1022.4 1021.8 1020.1 1019.5 1019.4 1024.3 1025.4 1029.4 1030.5 1030.5 DAY 26 19 11 1 17 25 3 31 21 11 18 3 MIN. QNH PRESSURE IN HPA 1006.6 1007.2 1006.1 999.3 1010.0 1004.9 1008.2 1007.3 1013.7 1014.2 1011.8 1005.3 999.3 DAY 8 27 21 4 12 20 24 17 18 22 12 22 MEAN QFF PRESSURE IN HPA 1021.4 1019.3 1015.0 1010.2 1009.8 1004.7 1004.9 1003.7 1010.9 1014.6 1021.0 1022.6 1013.2 MAX. QFF PRESSURE IN HPA 1029.8 1033.2 1034.5 1021.6 1018.2 1012.3 1011.4 1011.5 1016.8 1021.7 1031.5 1040.1 1040.1 DAY 18 19 11 1 17 25 3 31 30 23 18 4 MIN. QFF PRESSURE IN HPA 1002.8 1003.4 1000.2 996.6 1003.1 994.2 997.6 997.0 1005.3 1008.5 1009.0 1005.2 994.2 DAY 8 27 21 4 25 20 25 8 18 22 12 22 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 871.7 870.7 869.7 867.4 868.9 867.2 868.5 867.4 871.6 872.7 874.1 871.5 870.1 MAX. QFE PRESSURE IN HPA 878.2 879.8 880.7 875.4 875.6 873.1 873.0 872.5 876.5 877.1 881.1 882.1 882.1 DAY 27 19 11 1 17 25 3 30 21 10 18 3 MIN. QFE PRESSURE IN HPA 860.6 863.1 861.2 855.1 863.3 859.4 862.0 861.6 867.4 867.2 865.4 861.5 855.1 DAY 8 27 21 4 12 20 24 17 18 22 12 22 MEAN QNH PRESSURE IN HPA 1017.3 1016.2 1015.0 1012.4 1014.1 1012.2 1013.7 1012.4 1017.2 1018.5 1020.0 1017.0 1015.5 MAX. QNH PRESSURE IN HPA 1024.7 1026.5 1027.5 1021.5 1021.7 1018.9 1018.8 1018.2 1022.7 1023.4 1027.9 1029.1 1029.1 DAY 27 19 11 1 17 25 3 30 21 10 18 3 MIN. QNH PRESSURE IN HPA 1004.7 1007.5 1005.4 998.5 1007.8 1003.3 1006.3 1005.8 1012.4 1012.2 1010.1 1005.7 998.5 DAY 8 27 21 4 12 20 24 17 18 22 12 22 MEAN QFF PRESSURE IN HPA 1019.5 1017.9 1013.1 1008.9 1008.3 1003.3 1004.0 1001.9 1008.8 1012.0 1018.7 1020.6 1011.4 MAX. QFF PRESSURE IN HPA 1028.8 1031.1 1031.3 1019.9 1018.7 1011.0 1010.2 1009.0 1014.7 1020.2 1028.3 1036.1 1036.1 DAY 17 19 11 1 17 24 3 30 30 23 18 4 MIN. QFF PRESSURE IN HPA 1000.2 1004.4 999.7 995.1 999.4 992.4 996.4 994.4 1002.9 1005.5 1005.8 1006.1 992.4 DAY 8 27 21 4 25 20 25 17 11 22 12 22 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 871.1 870.1 868.6 866.8 868.1 866.2 867.9 866.4 870.6 872.0 873.6 871.3 869.4 MAX. QFE PRESSURE IN HPA 877.4 878.1 880.1 874.3 874.7 872.0 872.3 871.0 875.2 876.8 880.6 881.9 881.9 DAY 27 19 10 1 17 24 3 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 863.0 861.4 860.5 854.6 862.2 858.0 861.1 860.6 866.4 866.9 865.0 862.1 854.6 DAY 8 25 28 4 12 20 24 17 10 21 12 21 MEAN QNH PRESSURE IN HPA 1016.6 1015.5 1013.8 1011.8 1013.2 1011.1 1012.9 1011.3 1016.1 1017.6 1019.4 1016.8 1014.7 MAX. QNH PRESSURE IN HPA 1023.7 1024.5 1026.8 1020.2 1020.7 1017.6 1018.0 1016.5 1021.2 1023.1 1027.4 1028.8 1028.8 DAY 27 19 10 1 17 24 3 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1007.4 1005.6 1004.6 997.9 1006.5 1001.8 1005.3 1004.7 1011.3 1011.8 1009.7 1006.4 997.9 DAY 8 25 28 4 12 20 24 17 10 21 12 21 MEAN QFF PRESSURE IN HPA 1018.8 1017.2 1012.0 1008.5 1007.3 1002.5 1003.7 1001.2 1008.0 1011.6 1018.3 1020.6 1010.8 MAX. QFF PRESSURE IN HPA 1028.7 1029.0 1029.8 1018.2 1017.2 1010.6 1009.8 1008.1 1014.1 1018.5 1028.5 1035.3 1035.3 DAY 17 19 10 1 17 24 3 31 30 23 18 4 MIN. QFF PRESSURE IN HPA 1003.9 1004.3 998.7 995.4 999.3 991.3 995.8 993.8 1001.9 1006.2 1005.8 1006.4 991.3 DAY 8 26 28 4 12 20 24 17 11 21 12 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.9 871.0 869.3 867.2 868.6 866.5 868.1 867.0 871.3 872.9 874.5 872.0 870.0 MAX. QFE PRESSURE IN HPA 879.0 879.0 881.5 874.8 874.7 872.4 872.3 871.5 875.7 877.5 880.9 883.3 883.3 DAY 27 18 10 1 17 24 3 31 21 10 18 3 MIN. QFE PRESSURE IN HPA 864.0 861.9 860.1 857.0 863.8 858.2 862.0 861.6 867.4 867.7 866.5 861.4 857.0 DAY 8 25 28 4 4 20 24 17 10 21 12 21 MEAN QNH PRESSURE IN HPA 1017.5 1016.5 1014.5 1012.2 1013.7 1011.3 1013.2 1011.9 1016.9 1018.7 1020.5 1017.6 1015.4 MAX. QNH PRESSURE IN HPA 1025.6 1025.6 1028.4 1020.8 1020.7 1018.1 1018.0 1017.1 1021.8 1023.9 1027.7 1030.4 1030.4 DAY 27 18 10 1 17 24 3 31 21 10 18 3 MIN. QNH PRESSURE IN HPA 1008.6 1006.2 1004.1 1000.6 1008.3 1002.0 1006.3 1005.8 1012.4 1012.8 1011.4 1005.6 1000.6 DAY 8 25 28 4 4 20 24 17 10 21 12 21 MEAN QFF PRESSURE IN HPA 1020.8 1019.2 1013.8 1009.6 1008.4 1003.1 1004.2 1002.7 1010.3 1014.3 1020.5 1022.4 1012.4 MAX. QFF PRESSURE IN HPA 1030.6 1031.1 1032.4 1019.6 1017.2 1011.2 1010.5 1010.4 1015.9 1019.2 1030.3 1038.5 1038.5 DAY 27 18 10 1 17 24 2 31 29 23 18 3 MIN. QFF PRESSURE IN HPA 1005.6 1005.7 998.6 997.8 999.7 991.6 997.3 995.6 1005.5 1009.2 1008.9 1005.3 991.6 DAY 8 26 28 3 29 20 25 8 12 21 12 21 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 872.2 871.6 870.3 868.0 870.0 867.9 869.2 868.3 872.6 873.8 874.9 872.2 870.9 MAX. QFE PRESSURE IN HPA 879.3 880.3 882.8 875.8 875.5 874.2 873.5 873.5 876.5 878.1 881.6 883.7 883.7 DAY 27 18 10 1 17 24 2 31 29 10 18 3 MIN. QFE PRESSURE IN HPA 865.4 863.1 860.1 856.5 864.5 859.9 862.6 862.5 868.5 868.0 867.1 860.5 856.5 DAY 8 26 28 3 29 20 24 8 17 21 12 21 MEAN QNH PRESSURE IN HPA 1017.8 1017.2 1015.7 1013.1 1015.3 1013.0 1014.5 1013.4 1018.3 1019.7 1020.9 1017.8 1016.4 MAX. QNH PRESSURE IN HPA 1025.9 1027.0 1029.9 1021.9 1021.6 1020.1 1019.3 1019.3 1022.7 1024.5 1028.5 1030.9 1030.9 DAY 27 18 10 1 17 24 2 31 29 10 18 3 MIN. QNH PRESSURE IN HPA 1010.1 1007.5 1004.1 1000.0 1009.1 1003.9 1007.0 1006.9 1013.7 1013.1 1012.1 1004.6 1000.0 DAY 8 26 28 3 29 20 24 8 17 21 12 21 MEAN QFF PRESSURE IN HPA 1020.8 1019.5 1014.4 1010.0 1009.9 1004.4 1004.8 1003.4 1010.5 1014.0 1020.4 1022.1 1012.9 MAX. QFF PRESSURE IN HPA 1030.3 1032.3 1034.5 1020.3 1018.5 1012.3 1011.5 1011.7 1016.8 1019.0 1030.5 1039.0 1039.0 DAY 27 18 10 1 17 24 2 31 29 23 18 3 MIN. QFF PRESSURE IN HPA 1008.1 1004.3 997.4 996.1 1000.1 992.9 997.1 994.4 1004.6 1007.9 1008.9 1003.0 992.9 DAY 7 26 28 3 29 20 24 8 11 21 12 21 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 871.7 871.2 870.0 867.6 869.5 867.7 868.8 868.2 872.3 873.7 874.6 871.6 870.6 MAX. QFE PRESSURE IN HPA 878.8 880.6 881.8 875.0 875.4 875.2 873.0 873.3 876.6 877.5 881.8 883.4 883.4 DAY 27 18 10 1 16 24 2 31 20 10 17 3 MIN. QFE PRESSURE IN HPA 864.2 862.7 860.3 853.8 864.2 860.3 863.2 862.6 867.9 867.0 867.0 859.1 853.8 DAY 7 25 28 3 29 20 24 16 17 21 12 21 MEAN QNH PRESSURE IN HPA 1017.3 1016.7 1015.3 1012.7 1014.8 1012.8 1014.0 1013.3 1018.0 1019.6 1020.5 1017.2 1016.0 MAX. QNH PRESSURE IN HPA 1025.3 1027.4 1028.7 1021.0 1021.5 1021.2 1018.8 1019.1 1022.8 1023.9 1028.7 1030.5 1030.5 DAY 27 18 10 1 16 24 2 31 20 10 17 3 MIN. QNH PRESSURE IN HPA 1008.8 1007.1 1004.4 997.0 1008.8 1004.4 1007.6 1007.0 1013.0 1012.0 1012.0 1003.0 997.0 DAY 7 25 28 3 29 20 24 16 17 21 12 21 MEAN QFF PRESSURE IN HPA 1019.7 1018.5 1013.4 1009.1 1008.9 1003.8 1004.2 1002.9 1009.7 1013.2 1019.3 1020.9 1012.0 MAX. QFF PRESSURE IN HPA 1028.5 1032.3 1034.5 1018.9 1018.5 1013.2 1010.5 1010.8 1015.9 1018.4 1029.7 1038.4 1038.4 DAY 25 18 10 26 17 24 2 31 29 23 17 3 MIN. QFF PRESSURE IN HPA 1004.3 1004.3 996.3 992.8 999.6 993.2 997.3 995.8 1003.9 1005.7 1007.3 1000.6 992.8 DAY 7 26 28 3 29 20 24 8 11 21 12 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 2003 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.8 2.9 5.3 11.8 14.8 20.8 25.6 23.3 19.0 16.2 6.4 2.0 12.4 MINIMUN AIR TEMPERATURE (C) -3.3 -1.0 1.0 7.0 8.6 14.0 18.1 15.3 11.5 8.4 1.8 -1.9 6.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 0 0 0 0 0 3 DAYS WITH MINIMUM TEMP. <=-4 12 3 3 0 0 0 0 0 0 0 1 5 24 DAYS WITH FREEZING MIN.<= 0 26 22 12 3 0 0 0 0 0 0 13 18 94 TEMPERATURE RECORDS LOWEST(C) -12.0 -8.8 -8.6 -0.4 1.8 8.0 14.8 12.4 3.2 4.0 -4.2 -14.8 -14.8 DAY 23 18 3 18 2 8 1 31 28 14 24 13 MAXIMUM AIR TEMPERATURE (C) 6.2 7.9 11.0 17.8 21.3 27.7 32.9 30.5 26.9 24.8 12.6 7.1 18.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 0 10 27 21 9 0 0 0 68 DAYS WITH MAXIMUM TEMP. <= 0 5 1 2 0 0 0 0 0 0 0 0 4 12 TEMPERATURE RECORDS HIGHEST(C) 13.8 15.8 21.0 31.4 28.0 34.0 39.2 33.6 33.6 28.8 22.4 17.0 39.2 DAY 12 4 21 7 31 18 19 15 18 3 1 19 DIF. BETWEEN (MAX.-MIN.) (C) 9.5 8.9 10.0 10.8 12.7 13.7 14.8 15.2 15.4 16.4 10.8 9.0 12.3 MEAN DAILY TEMP. (MDT) (C) 1.4 3.5 6.0 12.4 15.0 20.8 25.5 22.9 19.2 16.6 7.2 2.6 12.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.3 0.0 31.0 139.3 59.3 13.6 0.0 0.0 0.0 245.5 HEATING DEG. DAYS(BASE 18 0C) 513.3 406.6 372.4 185.9 103.0 9.2 0.0 0.0 29.7 52.3 323.8 477.1 2473.3 DEWPOINT (MEAN C) -3.3 -1.0 0.4 5.2 6.1 8.4 9.4 7.3 4.0 1.1 -1.3 -2.5 2.8 MIXING RATIO (G/KG) 3.49 4.19 4.70 6.55 7.03 8.17 8.97 7.70 6.27 5.06 4.17 3.82 5.84 VAPOUR PRESSURE (HPA) 4.86 5.80 6.51 9.07 9.72 11.24 12.30 10.62 8.68 7.03 5.82 5.33 8.08 SATURATION DEF. (HPA) 1.99 2.07 3.08 6.30 8.07 14.53 21.93 19.02 14.78 12.50 4.53 2.18 9.25 RELATIVE HUMIDITY (MEAN %) 77 78 75 69 60 49 40 39 41 40 63 75 59 RELATIVE HUMIDITY (MAX. %) 91 94 93 87 83 72 61 60 62 60 81 89 78 RELATIVE HUMIDITY (MIN. %) 58 59 54 50 34 30 24 23 23 23 41 55 40 RELATIVE HUMIDITY (MEAN% 03UTC) 89 90 89 82 77 65 55 57 58 57 76 86 73 RELATIVE HUMIDITY (MEAN% 09UTC) 62 64 60 55 40 34 26 25 27 25 45 58 43 RELATIVE HUMIDITY (MEAN% 15UTC) 74 75 68 64 51 39 31 28 33 37 60 72 53 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 35.3 46.2 86.7 124.1 62.7 7.6 0.0 0.6 0.0 1.7 35.1 36.9 436.9 DAYS WITH PRECIPITATION >=10 1 0 4 5 3 0 0 0 0 0 2 1 16 DAYS WITH PRECIPITATION >= 5 3 4 6 7 5 1 0 0 0 0 3 1 30 DAYS WITH PRECIPITATION >= 1 6 11 9 11 8 1 0 0 0 1 6 6 59 DAYS WITH PRECIPITATION 6 13 15 16 11 7 0 2 0 2 8 11 91 GREATEST DAILY PRECIPITATION 14.0 7.1 18.0 24.3 18.0 5.0 0.0 0.6 0.0 1.4 12.0 22.0 24.3 DAY 20 16 13 15 9 20 ** 22 ** 28 15 11 DAY WITH THUNDER STORM 0 1 1 4 8 4 0 2 0 0 1 0 21 DAYS WITH SNOW OR SLEET 6 9 10 2 1 0 0 0 0 0 3 8 39 DAYS WITH DUST 0 0 1 2 0 0 0 0 0 0 0 0 3 WIND DIRECTION (PREVAILING) 135 135 315 315 315 315 90 45 90 135 315 135 135 PREVAILING WIND SPEED(KNOTS) 5.2 6.1 6.4 6.0 6.5 6.3 7.4 6.6 5.5 5.0 6.1 4.7 5.8 PREVAILING WIND PERCENT 4.0 12.5 15.7 16.3 12.5 13.8 24.2 17.3 13.3 16.5 14.6 6.9 9.9 CALMS PERCENT OF WIND 86.3 65.2 55.2 53.3 68.5 53.8 47.2 64.1 57.5 58.1 62.5 82.3 62.9 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 248 240 248 2920 VECTOR WIND DIRECTION (MEAN) 206 209 225 228 305 74 85 61 94 154 283 205 103 VECTOR WIND MAGNITUDE(KNOTS) 0.3 0.5 0.8 0.4 0.5 0.5 2.5 1.7 1.1 0.7 0.7 0.2 0.3 WIND STEADINESES (MEAN %) 42.9 25.0 25.8 13.8 23.8 17.2 69.4 77.3 45.8 31.8 33.3 20.0 13.0 WIND SPEED (MEAN KNOTS) 0.7 2.0 3.1 2.9 2.1 2.9 3.6 2.2 2.4 2.2 2.1 1.0 2.3 FASTEST WIND DIRECTION 110 310 320 320 290 310 110 40 50 60 310 170 290 FASTEST WIND SPEED (KNOTS) 12 14 16 16 39 14 17 16 14 12 14 16 39 DAY 28 28 2 28 23 6 30 2 22 7 15 20 DAYS WITH SKY CLEAR (0-2)/8 13 7 7 5 15 23 28 29 27 21 13 13 201 DAYS WITH P.CLOUDY (3-6)/8 11 9 10 10 10 5 3 2 3 10 10 8 91 DAYS WITH CLOUDY (7-8)/8 7 12 14 15 6 2 0 0 0 0 7 10 73 DAYS WITH VISIBILITY =< 2 KM 9 7 7 10 3 0 0 0 0 0 6 8 50 DURATION OF SUNSHINE HOURS 147.1 117.7 141.9 142.3 267.5 316.9 338.9 341.2 304.4 254.2 161.6 141.9 2675.6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.4 867.9 869.2 870.3 871.1 868.0 866.1 869.5 871.1 872.1 873.7 873.8 870.3 MAX. QFE PRESSURE IN HPA 877.7 877.0 878.5 877.5 879.8 873.8 872.5 873.1 878.7 878.8 882.7 884.1 884.1 DAY-HOUR 11- 6 12-18 2-18 30-18 1-18 6-18 4- 3 30- 3 27- 6 15-18 26- 6 12- 6 MIN. QFE PRESSURE IN HPA 856.3 855.1 857.6 864.1 865.0 861.6 861.2 865.8 863.8 864.0 865.1 864.0 855.1 DAY-HOUR 29- 0 20-21 26-21 5-12 23-12 30-12 8-12 1- 0 10-12 27-12 14- 9 6-21 MEAN QNH PRESSURE IN HPA 1017.0 1013.0 1014.5 1015.7 1016.6 1013.1 1011.0 1014.7 1016.6 1017.8 1019.6 1019.6 1015.7 MAX. QNH PRESSURE IN HPA 1024.1 1023.3 1025.0 1023.9 1026.5 1019.7 1018.2 1018.9 1025.2 1025.3 1029.7 1031.3 1031.3 DAY-HOUR 11- 6 12-18 2-18 30-18 1-18 6-18 4- 3 30- 3 27- 6 15-18 26- 6 12- 6 MIN. QNH PRESSURE IN HPA 999.8 998.5 1001.3 1008.7 1009.7 1005.8 1005.4 1010.6 1008.3 1008.6 1009.8 1008.6 998.5 DAY-HOUR 29- 0 20-21 26-21 5-12 23-12 30-12 8-12 1- 0 10-12 27-12 14- 9 6-21 MEAN QFF PRESSURE IN HPA 1020.2 1014.8 1015.0 1012.6 1011.9 1005.1 1000.5 1005.6 1009.7 1012.5 1019.6 1022.2 1012.5 MAX. QFF PRESSURE IN HPA 1029.3 1027.9 1032.4 1025.2 1028.2 1016.6 1009.4 1011.4 1023.7 1022.4 1033.4 1040.9 1040.9 DAY-HOUR 19- 6 12-18 3- 3 30-18 1-18 6-18 4- 3 30- 3 27- 3 15-15 23- 6 12- 6 MIN. QFF PRESSURE IN HPA 1000.4 997.3 996.0 1003.1 1001.9 996.4 993.8 999.2 999.1 1001.3 1006.0 1006.5 993.8 DAY-HOUR 29- 0 20-21 26-21 5-21 23-12 30-21 8-12 1- 0 10-12 27- 9 2-12 7- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 871.1 867.6 868.9 869.9 871.0 868.1 866.1 869.4 871.2 872.3 873.5 873.7 870.2 MAX. QFE PRESSURE IN HPA 877.2 875.8 877.7 874.8 878.1 872.3 871.8 872.0 877.8 877.6 882.4 883.2 883.2 DAY 19 13 3 16 2 7 4 4 27 16 26 12 MIN. QFE PRESSURE IN HPA 856.3 858.5 859.2 864.9 865.5 864.5 862.9 865.8 864.0 866.3 866.5 864.0 856.3 DAY 29 19 27 23 24 30 8 1 7 27 21 7 MEAN QNH PRESSURE IN HPA 1016.6 1012.6 1014.1 1015.2 1016.5 1013.2 1011.0 1014.7 1016.7 1017.9 1019.4 1019.6 1015.6 MAX. QNH PRESSURE IN HPA 1023.5 1021.9 1024.1 1020.8 1024.5 1018.0 1017.4 1017.6 1024.2 1024.0 1029.4 1030.3 1030.3 DAY 19 13 3 16 2 7 4 4 27 16 26 12 MIN. QNH PRESSURE IN HPA 999.8 1002.3 1003.1 1009.6 1010.3 1009.1 1007.3 1010.6 1008.6 1011.2 1011.4 1008.6 999.8 DAY 29 19 27 23 24 30 8 1 7 27 21 7 MEAN QFF PRESSURE IN HPA 1019.5 1014.0 1014.3 1011.9 1011.8 1005.1 1000.3 1005.3 1009.4 1012.2 1018.8 1021.8 1012.0 MAX. QFF PRESSURE IN HPA 1028.6 1026.7 1030.9 1022.0 1025.9 1015.5 1007.9 1009.8 1020.7 1019.9 1031.6 1039.1 1039.1 DAY 19 13 3 30 2 7 4 31 27 16 23 12 MIN. QFF PRESSURE IN HPA 1000.4 1003.6 999.6 1003.5 1002.9 999.4 995.8 999.2 1000.0 1004.4 1006.9 1006.5 995.8 DAY 29 21 21 23 24 28 9 1 7 27 1 7 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 871.3 867.8 869.3 870.6 871.6 868.8 867.0 870.2 871.9 872.6 873.8 873.8 870.7 MAX. QFE PRESSURE IN HPA 877.4 875.6 877.9 875.5 878.6 872.7 872.5 873.1 878.3 877.6 882.2 883.0 883.0 DAY 19 13 3 30 2 7 4 30 23 16 26 12 MIN. QFE PRESSURE IN HPA 858.0 856.7 860.2 866.7 865.3 864.5 863.3 866.9 864.7 867.1 866.5 865.4 856.7 DAY 29 19 21 14 30 30 8 1 7 26 21 7 MEAN QNH PRESSURE IN HPA 1016.8 1012.9 1014.5 1016.0 1017.2 1014.0 1012.0 1015.6 1017.5 1018.3 1019.7 1019.7 1016.2 MAX. QNH PRESSURE IN HPA 1023.7 1021.7 1024.3 1021.6 1025.1 1018.4 1018.2 1018.9 1024.8 1024.0 1029.2 1030.1 1030.1 DAY 19 13 3 30 2 7 4 30 23 16 26 12 MIN. QNH PRESSURE IN HPA 1001.8 1000.3 1004.2 1011.6 1010.0 1009.1 1007.8 1011.8 1009.3 1012.1 1011.4 1010.1 1000.3 DAY 29 19 21 14 30 30 8 1 7 26 21 7 MEAN QFF PRESSURE IN HPA 1020.8 1015.2 1015.6 1013.5 1013.1 1006.4 1002.1 1007.2 1011.8 1014.5 1020.6 1023.0 1013.6 MAX. QFF PRESSURE IN HPA 1029.2 1027.6 1032.4 1023.5 1026.5 1016.1 1009.4 1011.4 1023.7 1022.2 1033.4 1039.4 1039.4 DAY 23 13 3 30 2 7 4 30 27 16 23 12 MIN. QFF PRESSURE IN HPA 1003.1 1005.1 1001.5 1004.8 1003.5 1000.3 996.9 1002.3 1001.9 1006.4 1009.7 1008.4 996.9 DAY 29 19 21 27 30 30 8 1 7 27 14 7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 872.4 868.7 870.1 871.0 871.6 868.8 866.9 870.3 872.1 873.2 874.6 874.8 871.2 MAX. QFE PRESSURE IN HPA 877.7 875.8 878.1 875.6 879.0 873.0 872.2 873.1 878.7 878.5 882.7 884.1 884.1 DAY 11 13 3 16 2 7 4 30 27 15 26 12 MIN. QFE PRESSURE IN HPA 862.3 856.9 860.9 866.5 865.6 863.9 862.9 867.2 865.2 866.6 867.4 866.7 856.9 DAY 29 19 21 21 30 30 8 1 7 27 14 7 MEAN QNH PRESSURE IN HPA 1018.1 1013.9 1015.4 1016.5 1017.2 1014.0 1011.9 1015.7 1017.7 1018.9 1020.6 1020.8 1016.7 MAX. QNH PRESSURE IN HPA 1024.1 1021.9 1024.5 1021.7 1025.6 1018.8 1017.9 1018.9 1025.2 1025.0 1029.7 1031.3 1031.3 DAY 11 13 3 16 2 7 4 30 27 15 26 12 MIN. QNH PRESSURE IN HPA 1006.6 1000.5 1005.0 1011.4 1010.4 1008.4 1007.3 1012.2 1009.9 1011.5 1012.4 1011.6 1000.5 DAY 29 19 21 21 30 30 8 1 7 27 14 7 MEAN QFF PRESSURE IN HPA 1021.6 1015.9 1016.3 1013.5 1012.6 1006.2 1001.5 1006.3 1010.7 1013.5 1020.7 1023.6 1013.5 MAX. QFF PRESSURE IN HPA 1029.3 1026.6 1031.1 1022.7 1026.9 1016.1 1008.7 1009.6 1021.7 1021.1 1033.4 1040.9 1040.9 DAY 19 13 3 30 1 7 4 30 27 15 23 12 MIN. QFF PRESSURE IN HPA 1008.9 1004.9 1000.4 1004.0 1003.7 999.3 996.1 1002.9 1000.8 1004.6 1009.7 1009.5 996.1 DAY 29 19 21 27 30 30 8 1 7 27 14 7 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 871.3 868.0 869.3 870.1 870.9 867.8 865.8 869.2 870.6 871.6 873.2 873.3 870.1 MAX. QFE PRESSURE IN HPA 876.9 874.6 876.7 875.1 878.6 873.1 871.0 872.4 877.4 877.0 881.1 882.6 882.6 DAY 11 24 2 16 1 6 3 30 26 15 25 12 MIN. QFE PRESSURE IN HPA 864.0 856.5 859.9 865.5 865.6 862.3 861.9 866.0 864.8 864.5 865.1 865.7 856.5 DAY 29 19 13 5 8 30 31 1 7 27 14 7 MEAN QNH PRESSURE IN HPA 1016.9 1013.1 1014.6 1015.5 1016.3 1012.9 1010.6 1014.4 1016.1 1017.2 1019.0 1019.1 1015.5 MAX. QNH PRESSURE IN HPA 1023.2 1020.6 1022.9 1021.1 1025.1 1018.9 1016.5 1018.1 1023.7 1023.3 1027.9 1029.6 1029.6 DAY 11 24 2 16 1 6 3 30 26 15 25 12 MIN. QNH PRESSURE IN HPA 1008.6 1000.0 1003.9 1010.3 1010.4 1006.6 1006.2 1010.8 1009.5 1009.1 1009.8 1010.5 1000.0 DAY 29 19 13 5 8 30 31 1 7 27 14 7 MEAN QFF PRESSURE IN HPA 1019.5 1014.6 1014.8 1012.0 1011.4 1004.6 999.6 1004.8 1008.6 1011.1 1018.4 1021.1 1011.7 MAX. QFF PRESSURE IN HPA 1027.0 1023.1 1029.2 1021.4 1026.7 1014.4 1006.3 1009.4 1019.6 1019.2 1030.7 1039.5 1039.5 DAY 19 13 2 30 1 6 4 30 27 15 23 12 MIN. QFF PRESSURE IN HPA 1010.7 1003.8 1000.2 1004.0 1003.5 997.1 994.5 1000.5 1000.7 1001.3 1006.2 1007.1 994.5 DAY 29 19 13 27 23 30 8 1 10 27 14 7 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 870.9 867.2 868.3 869.3 870.2 866.8 865.0 868.4 869.6 870.9 872.8 873.0 869.4 MAX. QFE PRESSURE IN HPA 875.6 874.1 876.4 874.7 877.9 872.8 870.0 871.5 876.6 876.8 881.1 882.3 882.3 DAY 10 12 2 16 1 6 3 30 26 15 25 12 MIN. QFE PRESSURE IN HPA 861.8 856.8 859.5 864.1 865.0 861.6 861.2 866.0 863.8 864.0 865.5 865.9 856.8 DAY 28 19 26 5 23 30 8 1 10 27 14 6 MEAN QNH PRESSURE IN HPA 1016.3 1012.2 1013.5 1014.5 1015.6 1011.8 1009.7 1013.5 1014.9 1016.3 1018.5 1018.8 1014.6 MAX. QNH PRESSURE IN HPA 1021.7 1020.0 1022.6 1020.7 1024.3 1018.5 1015.4 1017.1 1022.8 1023.1 1027.9 1029.3 1029.3 DAY 10 12 2 16 1 6 3 30 26 15 25 12 MIN. QNH PRESSURE IN HPA 1006.1 1000.4 1003.4 1008.7 1009.7 1005.8 1005.4 1010.8 1008.3 1008.6 1010.3 1010.7 1000.4 DAY 28 19 26 5 23 30 8 1 10 27 14 6 MEAN QFF PRESSURE IN HPA 1019.1 1013.6 1013.6 1011.1 1010.8 1003.7 999.1 1004.3 1007.7 1010.6 1018.1 1021.0 1011.0 MAX. QFF PRESSURE IN HPA 1026.0 1022.9 1029.2 1020.5 1025.6 1014.1 1005.9 1008.4 1019.5 1018.8 1029.2 1038.7 1038.7 DAY 23 12 2 29 1 6 4 30 27 15 25 12 MIN. QFF PRESSURE IN HPA 1009.0 1003.9 998.7 1003.2 1001.9 997.1 993.8 1000.7 999.1 1001.5 1006.0 1008.5 993.8 DAY 28 19 26 5 23 30 8 1 10 27 2 7 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 871.5 867.8 869.0 870.0 870.6 867.2 865.2 868.7 870.4 871.7 873.8 873.8 870.0 MAX. QFE PRESSURE IN HPA 876.2 876.3 877.9 875.4 878.2 873.2 870.9 871.8 877.7 877.8 881.9 882.3 882.3 DAY 10 12 2 30 1 6 3 30 26 15 25 12 MIN. QFE PRESSURE IN HPA 860.7 858.1 859.2 864.2 865.3 862.1 861.3 866.6 864.3 866.3 865.6 865.6 858.1 DAY 28 19 26 5 30 30 7 1 6 25 20 6 MEAN QNH PRESSURE IN HPA 1017.1 1012.9 1014.2 1015.4 1016.1 1012.2 1009.9 1013.9 1015.8 1017.3 1019.7 1019.6 1015.3 MAX. QNH PRESSURE IN HPA 1022.4 1022.5 1024.3 1021.5 1024.7 1019.0 1016.4 1017.4 1024.1 1024.2 1028.8 1029.3 1029.3 DAY 10 12 2 30 1 6 3 30 26 15 25 12 MIN. QNH PRESSURE IN HPA 1004.8 1001.9 1003.1 1008.8 1010.0 1006.4 1005.5 1011.5 1008.9 1011.2 1010.4 1010.4 1001.9 DAY 28 19 26 5 30 30 7 1 6 25 20 6 MEAN QFF PRESSURE IN HPA 1021.0 1015.2 1015.2 1012.7 1011.8 1004.6 1000.0 1005.6 1010.1 1013.4 1020.7 1023.0 1012.8 MAX. QFF PRESSURE IN HPA 1028.6 1026.6 1031.7 1022.3 1026.2 1015.6 1007.5 1010.1 1022.2 1022.4 1032.4 1040.6 1040.6 DAY 25 12 2 30 1 6 3 30 27 15 25 12 MIN. QFF PRESSURE IN HPA 1008.1 1003.4 999.1 1004.3 1003.5 998.0 994.7 1002.7 1001.3 1006.2 1009.5 1010.0 994.7 DAY 28 20 26 5 30 30 8 14 10 27 1 6 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 871.8 868.3 869.8 871.1 871.6 868.5 866.7 869.9 871.5 872.5 874.3 874.1 870.8 MAX. QFE PRESSURE IN HPA 877.0 877.0 878.5 877.5 879.8 873.8 872.0 872.5 878.4 878.8 882.4 883.0 883.0 DAY 10 12 2 30 1 6 3 30 26 15 25 11 MIN. QFE PRESSURE IN HPA 858.9 855.8 857.8 865.0 866.1 862.7 862.7 867.8 864.9 866.6 867.3 865.0 855.8 DAY 28 20 26 5 30 30 8 26 6 26 20 6 MEAN QNH PRESSURE IN HPA 1017.4 1013.4 1015.1 1016.6 1017.2 1013.7 1011.6 1015.2 1017.1 1018.2 1020.2 1020.0 1016.3 MAX. QNH PRESSURE IN HPA 1023.3 1023.3 1025.0 1023.9 1026.5 1019.7 1017.6 1018.2 1024.9 1025.3 1029.4 1030.1 1030.1 DAY 10 12 2 30 1 6 3 30 26 15 25 11 MIN. QNH PRESSURE IN HPA 1002.8 999.3 1001.5 1009.7 1010.9 1007.1 1007.1 1012.9 1009.6 1011.5 1012.3 1009.7 999.3 DAY 28 20 26 5 30 30 8 26 6 26 20 6 MEAN QFF PRESSURE IN HPA 1020.9 1015.5 1015.9 1013.6 1012.4 1005.8 1001.2 1005.9 1010.2 1012.8 1020.5 1022.9 1013.1 MAX. QFF PRESSURE IN HPA 1028.0 1027.9 1032.2 1025.2 1028.2 1016.6 1008.4 1009.0 1021.7 1021.5 1031.6 1040.5 1040.5 DAY 22 12 2 30 1 6 3 30 26 15 23 12 MIN. QFF PRESSURE IN HPA 1004.5 999.3 996.5 1003.1 1004.3 997.3 995.7 1003.3 1000.7 1004.1 1010.8 1008.3 995.7 DAY 28 20 26 5 30 30 8 13 6 26 1 6 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 871.2 867.9 869.2 870.6 871.2 868.0 866.4 869.7 871.3 872.3 874.1 873.7 870.5 MAX. QFE PRESSURE IN HPA 876.5 876.8 878.1 876.4 879.0 873.0 872.0 872.3 878.0 878.1 882.4 883.0 883.0 DAY 18 12 2 30 1 6 3 30 26 15 25 11 MIN. QFE PRESSURE IN HPA 857.4 855.1 857.6 865.7 865.6 862.2 862.4 867.6 864.5 866.5 867.2 864.0 855.1 DAY 28 20 26 5 30 30 30 26 6 25 20 6 MEAN QNH PRESSURE IN HPA 1016.8 1013.0 1014.5 1016.0 1016.7 1013.1 1011.3 1015.0 1016.9 1018.0 1020.0 1019.6 1015.9 MAX. QNH PRESSURE IN HPA 1022.7 1023.1 1024.5 1022.6 1025.6 1018.8 1017.6 1018.0 1024.4 1024.5 1029.4 1030.1 1030.1 DAY 18 12 2 30 1 6 3 30 26 15 25 11 MIN. QNH PRESSURE IN HPA 1001.1 998.5 1001.3 1010.5 1010.4 1006.5 1006.7 1012.6 1009.1 1011.4 1012.2 1008.6 998.5 DAY 28 20 26 5 30 30 30 26 6 25 20 6 MEAN QFF PRESSURE IN HPA 1019.5 1014.5 1014.6 1012.6 1011.5 1004.8 1000.3 1005.4 1009.4 1011.9 1019.5 1021.7 1012.1 MAX. QFF PRESSURE IN HPA 1027.6 1027.2 1031.2 1023.1 1027.3 1016.2 1008.3 1009.3 1020.4 1020.5 1030.5 1038.8 1038.8 DAY 18 12 2 30 1 6 3 30 26 15 22 11 MIN. QFF PRESSURE IN HPA 1001.2 997.3 996.0 1003.1 1003.9 996.4 995.4 1002.8 1000.5 1004.1 1009.3 1006.7 995.4 DAY 28 20 26 5 29 30 30 14 6 26 1 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 M MEANS AND EXTREMES FOR THE YEAR 2004 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.0 5.4 7.8 10.6 18.4 22.9 23.1 24.0 19.2 12.9 9.0 0.3 13.0 MINIMUN AIR TEMPERATURE (C) -0.7 0.1 2.5 4.9 11.7 14.8 16.2 15.9 11.5 6.1 4.1 -3.5 7.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 5 2 1 0 0 0 0 0 0 0 2 15 25 DAYS WITH FREEZING MIN.<= 0 17 16 11 5 0 0 0 0 0 0 5 25 79 TEMPERATURE RECORDS LOWEST(C) -8.2 -5.4 -5.4 -0.6 6.0 10.6 12.4 12.4 6.8 0.4 -7.8 -11.0 -11.0 DAY 31 1 17 6 7 15 15 21 30 9 29 30 MAXIMUM AIR TEMPERATURE (C) 8.0 11.6 13.8 16.8 25.9 30.2 30.4 31.4 27.3 21.3 15.4 5.4 19.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 4 21 18 24 9 0 0 0 76 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 2 3 TEMPERATURE RECORDS HIGHEST(C) 14.4 22.2 26.6 27.4 31.4 35.2 36.4 38.0 35.6 29.6 24.2 14.2 38.0 DAY 10 15 30 23 11 10 2 12 6 4 2 12 DIF. BETWEEN (MAX.-MIN.) (C) 8.7 11.5 11.3 11.9 14.2 15.4 14.2 15.5 15.8 15.2 11.3 8.9 12.8 MEAN DAILY TEMP. (MDT) (C) 3.6 5.8 8.2 10.9 18.8 22.5 23.3 23.6 19.4 13.7 9.7 0.9 13.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 8.6 55.5 76.9 81.8 21.4 0.0 0.0 0.0 244.2 HEATING DEG. DAYS(BASE 18 0C) 445.0 352.5 305.4 217.2 22.9 0.0 0.0 0.0 16.8 134.9 248.3 528.9 2271.9 DEWPOINT (MEAN C) -1.1 -1.9 0.7 3.1 7.0 6.3 11.1 5.9 3.7 2.1 2.5 -3.1 3.0 MIXING RATIO (G/KG) 4.16 3.91 4.69 5.71 7.44 7.21 9.75 7.05 6.08 5.31 5.44 3.58 5.86 VAPOUR PRESSURE (HPA) 5.77 5.43 6.53 7.91 10.25 9.95 13.39 9.72 8.43 7.41 7.56 4.98 8.11 SATURATION DEF. (HPA) 2.08 4.16 5.21 5.80 12.00 19.25 15.85 21.28 15.13 8.58 4.64 1.52 9.62 RELATIVE HUMIDITY (MEAN %) 77 64 66 65 52 39 50 34 39 53 68 80 57 RELATIVE HUMIDITY (MAX. %) 91 86 84 85 76 61 73 52 60 73 84 93 77 RELATIVE HUMIDITY (MIN. %) 57 41 48 46 29 23 29 21 23 31 49 64 38 RELATIVE HUMIDITY (MEAN% 03UTC) 88 82 80 80 69 52 67 47 56 69 80 88 72 RELATIVE HUMIDITY (MEAN% 09UTC) 63 46 53 52 34 26 32 24 26 34 54 68 43 RELATIVE HUMIDITY (MEAN% 15UTC) 73 57 62 59 46 29 42 26 33 49 67 80 52 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 35.0 23.3 80.1 113.9 15.2 2.7 16.3 0.0 0.0 6.1 38.4 69.3 400.3 DAYS WITH PRECIPITATION >=10 1 0 4 6 0 0 0 0 0 0 1 1 13 DAYS WITH PRECIPITATION >= 5 2 2 4 8 2 0 0 0 0 0 3 7 28 DAYS WITH PRECIPITATION >= 1 5 5 5 9 4 1 7 0 0 2 5 10 53 DAYS WITH PRECIPITATION 11 8 11 12 7 3 12 0 0 7 11 12 94 GREATEST DAILY PRECIPITATION 17.8 9.6 29.0 23.1 6.0 2.0 3.6 0.0 0.0 3.0 17.4 28.0 29.0 DAY 28 8 15 25 31 5 24 ** ** 24 28 17 DAY WITH THUNDER STORM 0 0 0 4 8 2 8 0 0 2 2 0 26 DAYS WITH SNOW OR SLEET 4 4 6 5 0 0 0 0 0 0 2 12 33 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 315 135 135 135 135 90 45 90 90 315 135 135 135 PREVAILING WIND SPEED(KNOTS) 6.2 5.8 6.3 6.0 5.8 6.1 6.5 5.6 5.5 4.9 5.0 4.7 5.5 PREVAILING WIND PERCENT 6.9 9.5 14.5 26.7 21.4 18.3 14.9 19.0 14.2 10.9 13.3 5.6 11.4 CALMS PERCENT OF WIND 81.5 72.4 62.9 41.3 41.9 52.1 56.5 50.8 57.5 64.9 65.8 86.3 61.2 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 240 215 172 150 122 64 53 71 83 235 178 260 102 VECTOR WIND MAGNITUDE(KNOTS) 0.2 0.6 0.4 1.4 0.9 1.8 1.1 1.9 1.2 0.2 0.7 0.1 0.5 WIND STEADINESES (MEAN %) 16.7 35.3 19.0 40.0 26.5 64.3 45.8 70.4 54.5 11.8 38.9 14.3 22.7 WIND SPEED (MEAN KNOTS) 1.2 1.7 2.1 3.5 3.4 2.8 2.4 2.7 2.2 1.7 1.8 0.7 2.2 FASTEST WIND DIRECTION 310 120 150 300 140 60 300 40 60 330 180 300 310 FASTEST WIND SPEED (KNOTS) 19 16 16 14 16 16 19 14 14 17 16 14 19 DAY 28 15 13 16 23 14 23 6 12 11 23 2 DAYS WITH SKY CLEAR (0-2)/8 8 16 9 9 16 28 20 31 29 24 12 11 213 DAYS WITH P.CLOUDY (3-6)/8 15 9 10 12 13 1 9 0 1 5 12 9 96 DAYS WITH CLOUDY (7-8)/8 8 4 12 9 2 1 2 0 0 2 6 11 57 DAYS WITH VISIBILITY =< 2 KM 9 7 7 8 0 0 0 0 0 0 6 9 46 DURATION OF SUNSHINE HOURS 135.2 197.7 167.6 206.6 288.7 359.6 309.8 356.2 304.0 266.5 154.8 117.1 2863.8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 868.5 869.8 872.5 869.6 867.9 868.4 868.1 868.1 872.7 875.0 871.9 871.8 870.4 MAX. QFE PRESSURE IN HPA 876.2 875.4 883.1 877.5 875.4 876.5 873.9 873.0 877.8 880.9 877.5 882.6 883.1 DAY-HOUR 11- 6 10- 6 8-18 11- 6 22- 3 6- 3 6- 3 17-18 21- 6 15- 6 13- 6 3-18 MIN. QFE PRESSURE IN HPA 858.6 856.2 862.8 855.3 857.5 862.5 862.3 860.7 866.8 868.3 858.3 863.5 855.3 DAY-HOUR 27-18 15-21 31- 9 17-12 14-12 17-15 10- 9 12-15 10-15 3-12 23-21 10- 0 MEAN QNH PRESSURE IN HPA 1013.6 1015.2 1018.2 1014.9 1013.0 1013.6 1013.2 1013.1 1018.5 1021.1 1017.5 1017.4 1015.8 MAX. QNH PRESSURE IN HPA 1022.4 1021.5 1030.2 1023.9 1021.5 1022.7 1019.8 1018.8 1024.2 1027.7 1023.9 1029.6 1030.2 DAY-HOUR 11- 6 10- 6 8-18 11- 6 22- 3 6- 3 6- 3 17-18 21- 6 15- 6 13- 6 3-18 MIN. QNH PRESSURE IN HPA 1002.4 999.7 1007.2 998.7 1001.2 1006.9 1006.6 1004.8 1011.7 1013.4 1002.1 1008.0 998.7 DAY-HOUR 27-18 15-21 31- 9 17-12 14-12 17-15 10- 9 12-15 10-15 3-12 23-21 10- 0 MEAN QFF PRESSURE IN HPA 1015.5 1015.7 1017.5 1012.5 1006.2 1004.7 1004.0 1003.7 1011.6 1017.5 1016.0 1020.9 1012.1 MAX. QFF PRESSURE IN HPA 1027.2 1023.9 1032.6 1023.4 1018.4 1016.1 1011.9 1010.4 1020.0 1026.2 1029.8 1036.6 1036.6 DAY-HOUR 1- 6 10- 3 9- 6 5-18 22- 3 6- 3 6- 3 18- 3 21- 3 27- 3 29- 3 3-15 MIN. QFF PRESSURE IN HPA 1003.3 992.6 1000.5 995.0 991.5 997.9 996.5 993.5 1002.1 1007.1 996.5 1008.7 991.5 DAY-HOUR 27-18 15-21 31- 9 17- 9 13-12 17-15 10- 9 12-12 10-12 22-12 23-21 10- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 868.4 869.5 872.3 869.3 868.0 868.5 868.2 867.9 872.7 875.1 871.8 871.6 870.3 MAX. QFE PRESSURE IN HPA 875.8 874.4 881.9 876.4 874.6 875.6 872.2 871.9 876.6 880.4 876.9 881.3 881.9 DAY 12 10 9 11 22 6 6 18 26 15 29 4 MIN. QFE PRESSURE IN HPA 859.0 858.2 863.6 861.9 860.5 864.0 864.6 862.0 867.1 869.6 861.9 863.5 858.2 DAY 28 16 31 18 14 18 11 13 11 22 24 10 MEAN QNH PRESSURE IN HPA 1013.6 1014.8 1017.9 1014.5 1013.1 1013.6 1013.3 1013.0 1018.4 1021.1 1017.4 1017.2 1015.7 MAX. QNH PRESSURE IN HPA 1021.9 1020.3 1028.8 1022.6 1020.6 1021.7 1017.9 1017.5 1022.8 1027.1 1023.2 1028.2 1028.8 DAY 12 10 9 11 22 6 6 18 26 15 29 4 MIN. QNH PRESSURE IN HPA 1002.9 1002.0 1008.1 1006.2 1004.6 1008.6 1009.2 1006.3 1012.1 1014.9 1006.2 1008.0 1002.0 DAY 28 16 31 18 14 18 11 13 11 22 24 10 MEAN QFF PRESSURE IN HPA 1015.1 1015.1 1016.9 1011.9 1006.3 1004.9 1004.0 1003.4 1011.2 1017.1 1015.3 1020.4 1011.8 MAX. QFF PRESSURE IN HPA 1025.8 1021.6 1030.8 1022.9 1016.6 1013.8 1009.7 1009.1 1017.8 1026.0 1029.1 1035.2 1035.2 DAY 1 10 9 6 22 6 8 18 21 15 29 4 MIN. QFF PRESSURE IN HPA 1005.5 997.6 1000.7 998.5 995.2 999.2 999.5 994.2 1002.9 1009.0 1001.3 1008.7 994.2 DAY 24 16 31 24 13 18 11 13 11 23 24 10 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 868.5 870.0 872.7 870.0 868.5 869.3 868.9 868.8 873.5 875.5 872.1 871.9 870.8 MAX. QFE PRESSURE IN HPA 875.8 874.8 882.2 877.3 875.4 876.5 873.9 872.5 877.4 880.2 877.3 880.7 882.2 DAY 11 13 9 11 22 6 6 18 21 15 13 3 MIN. QFE PRESSURE IN HPA 860.6 860.2 864.8 860.9 860.0 865.3 863.8 863.3 867.8 869.9 861.8 864.2 860.0 DAY 28 16 31 17 14 18 11 12 11 22 28 10 MEAN QNH PRESSURE IN HPA 1013.6 1015.4 1018.4 1015.3 1013.6 1014.6 1014.1 1014.0 1019.3 1021.6 1017.7 1017.5 1016.3 MAX. QNH PRESSURE IN HPA 1021.9 1020.8 1029.2 1023.6 1021.5 1022.7 1019.8 1018.2 1023.7 1026.9 1023.6 1027.5 1029.2 DAY 11 13 9 11 22 6 6 18 21 15 13 3 MIN. QNH PRESSURE IN HPA 1004.7 1004.2 1009.5 1005.0 1004.0 1010.0 1008.3 1007.8 1012.9 1015.2 1006.1 1008.8 1004.0 DAY 28 16 31 17 14 18 11 12 11 22 28 10 MEAN QFF PRESSURE IN HPA 1016.1 1016.8 1018.5 1013.6 1007.6 1006.2 1005.5 1005.3 1013.7 1019.4 1017.0 1021.7 1013.4 MAX. QFF PRESSURE IN HPA 1026.8 1023.9 1031.5 1022.9 1018.4 1016.1 1011.9 1010.4 1020.0 1026.2 1029.8 1035.5 1035.5 DAY 1 10 9 6 22 6 6 18 21 27 29 4 MIN. QFF PRESSURE IN HPA 1005.8 1002.0 1003.5 1000.5 997.1 1001.3 1000.1 997.1 1005.3 1011.3 1002.3 1009.0 997.1 DAY 14 16 31 24 13 18 11 13 11 22 28 10 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION GHOOCHAN (40740) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 4 N LONGITUDE 58 30 E DATA PROCESSING CENTER ELEVATION 1287.0 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 869.3 870.9 873.2 870.3 868.4 869.1 868.6 869.0 873.8 875.9 872.9 872.7 871.2 MAX. QFE PRESSURE IN HPA 876.2 875.4 883.0 877.5 874.8 875.7 873.0 872.7 877.8 880.9 877.5 882.4 883.0 DAY 11 10 9 11 22 6 6 18 21 15 13 3 MIN. QFE PRESSURE IN HPA 861.9 862.9 865.0 859.8 859.6 865.2 863.3 863.5 869.6 870.4 865.1 866.6 859.6 DAY 14 15 31 17 14 10 11 4 11 22 23 10 MEAN QNH PRESSURE IN HPA 1014.6 1016.3 1019.0 1015.7 1013.6 1014.3 1013.8 1014.2 1019.7 1022.0 1018.6 1018.5 1016.7 MAX. QNH PRESSURE IN HPA 1022.4 1021.5 1030.1 1023.9 1020.8 1021.8 1018.8 1018.4 1024.2 1027.7 1023.9 1029.4 1030.1 DAY 11 10 9 11 22 6 6 18 21 15 13 3 MIN. QNH PRESSURE IN HPA 1006.2 1007.3 1009.7 1003.8 1003.6 1009.9 1007.8 1008.0 1014.9 1015.8 1009.8 1011.5 1003.6 DAY 14 15 31 17 14 10 11 4 11 22 23 10 MEAN QFF PRESSURE IN HPA 1016.7 1017.2 1018.4 1013.4 1006.9 1005.3 1004.6 1004.6 1012.6 1018.4 1017.1 1022.2 1013.1 MAX. QFF PRESSURE IN HPA 1027.2 1023.6 1032.6 1023.1 1016.8 1014.7 1009.7 1009.0 1018.7 1026.2 1027.8 1035.4 1035.4 DAY 1 10 9 6 22 6 6 18 21 15 29 3 MIN. QFF PRESSURE IN HPA 1005.1 1002.0 1004.0 999.3 995.8 1000.2 999.2 997.2 1005.4 1010.2 1006.9 1013.1 995.8 DAY 14 15 31 24 14 10 10 12 6 22 18 10 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 868.1 869.9 872.4 869.4 867.4 868.1 867.6 867.9 872.3 874.3 871.5 871.5 870.0 MAX. QFE PRESSURE IN HPA 874.4 874.7 882.0 875.7 873.7 874.8 872.3 872.3 876.7 879.2 877.1 881.8 882.0 DAY 11 10 9 11 27 6 6 18 21 27 30 3 MIN. QFE PRESSURE IN HPA 861.1 860.8 862.8 857.4 858.4 864.0 862.3 862.4 868.2 869.0 863.2 865.3 857.4 DAY 27 15 31 17 14 17 10 12 5 3 23 15 MEAN QNH PRESSURE IN HPA 1013.2 1015.2 1018.1 1014.7 1012.4 1013.2 1012.6 1013.0 1017.9 1020.2 1017.1 1017.1 1015.4 MAX. QNH PRESSURE IN HPA 1020.3 1020.7 1029.0 1021.8 1019.5 1020.8 1018.0 1018.0 1022.9 1025.8 1023.4 1028.7 1029.0 DAY 11 10 9 11 27 6 6 18 21 27 30 3 MIN. QNH PRESSURE IN HPA 1005.3 1004.9 1007.2 1001.1 1002.2 1008.6 1006.6 1006.7 1013.3 1014.2 1007.6 1010.0 1001.1 DAY 27 15 31 17 14 17 10 12 5 3 23 15 MEAN QFF PRESSURE IN HPA 1014.6 1015.2 1016.9 1011.8 1005.1 1003.9 1002.8 1003.0 1010.2 1015.9 1015.0 1020.1 1011.2 MAX. QFF PRESSURE IN HPA 1023.7 1021.6 1030.9 1021.0 1014.5 1013.1 1008.4 1009.5 1016.9 1023.5 1026.8 1034.5 1034.5 DAY 30 8 9 6 22 6 6 18 21 15 30 3 MIN. QFF PRESSURE IN HPA 1005.8 998.8 1000.5 995.0 993.1 998.6 996.5 994.9 1003.4 1007.4 1003.9 1011.0 993.1 DAY 14 15 31 17 13 10 10 12 6 22 23 15 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 867.7 868.9 871.6 868.6 866.5 867.3 867.0 866.9 871.3 873.8 871.0 871.1 869.3 MAX. QFE PRESSURE IN HPA 874.2 873.6 880.7 875.0 873.5 873.8 870.9 871.5 875.6 878.1 876.8 881.8 881.8 DAY 12 10 8 28 22 6 6 18 21 14 30 3 MIN. QFE PRESSURE IN HPA 859.5 858.4 862.8 855.3 857.5 862.7 862.3 861.0 866.9 868.3 862.1 865.0 855.3 DAY 27 15 31 17 14 17 10 12 5 3 23 15 MEAN QNH PRESSURE IN HPA 1012.7 1014.1 1017.1 1013.8 1011.4 1012.3 1011.9 1011.9 1016.8 1019.6 1016.5 1016.7 1014.6 MAX. QNH PRESSURE IN HPA 1020.1 1019.4 1027.5 1021.0 1019.3 1019.7 1016.4 1017.1 1021.7 1024.5 1023.1 1028.7 1028.7 DAY 12 10 8 28 22 6 6 18 21 14 30 3 MIN. QNH PRESSURE IN HPA 1003.4 1002.2 1007.2 998.7 1001.2 1007.1 1006.6 1005.2 1011.8 1013.4 1006.4 1009.7 998.7 DAY 27 15 31 17 14 17 10 12 5 3 23 15 MEAN QFF PRESSURE IN HPA 1014.1 1014.2 1016.1 1011.1 1004.6 1003.5 1002.6 1002.3 1009.6 1015.6 1014.5 1019.8 1010.7 MAX. QFF PRESSURE IN HPA 1022.4 1021.3 1029.2 1019