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