STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 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 ****** ****** 766.6 771.5 771.6 769.6 769.4 769.1 770.8 773.7 772.7 769.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** 772.0 774.7 774.1 772.9 771.9 772.0 775.8 777.2 776.8 773.9 ****** DAY ** ** 7 10 25 25 20 26 24 27 28 18 MIN. 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QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.1 -2.5 4.2 10.8 18.6 23.9 25.3 26.0 22.4 14.1 9.6 3.4 12.5 MINIMUN AIR TEMPERATURE (C) -11.4 -9.2 -1.9 3.3 8.8 13.0 16.1 15.7 11.3 5.4 1.2 -4.1 4.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 0 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 30 25 8 0 0 0 0 0 0 0 0 11 74 DAYS WITH FREEZING MIN.<= 0 31 28 23 8 0 0 0 0 0 1 12 25 128 TEMPERATURE RECORDS LOWEST(C) -19.3 -15.8 -9.6 -2.5 3.4 8.2 13.2 12.0 9.4 0.0 -3.8 -19.6 -19.6 DAY 11 8 21 6 14 1 8 21 25 30 30 28 MAXIMUM AIR TEMPERATURE (C) -0.1 2.6 8.6 15.2 23.3 29.0 30.2 31.6 28.4 19.6 15.0 8.7 17.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 10 18 28 10 0 0 0 66 DAYS WITH MAXIMUM TEMP. <= 0 19 6 1 0 0 0 0 0 0 0 0 3 29 TEMPERATURE RECORDS HIGHEST(C) 4.5 6.6 14.0 22.6 27.5 33.5 32.0 33.8 31.0 24.5 20.4 16.4 33.8 DAY 1 19 12 13 24 30 1 16 5 2 5 1 DIF. BETWEEN (MAX.-MIN.) (C) 11.3 11.8 10.5 11.9 14.5 16.0 14.1 15.9 17.1 14.2 13.8 12.8 13.7 MEAN DAILY TEMP. (MDT) (C) -5.7 -3.3 3.4 9.3 16.1 21.0 23.2 23.6 19.8 12.5 8.1 2.3 10.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 22.5 68.3 81.7 3.8 0.0 0.0 0.0 176.3 HEATING DEG. DAYS(BASE 18 0C) 736.0 596.7 453.0 261.5 66.5 2.0 0.0 0.0 0.4 170.2 295.6 486.1 3068.1 DEWPOINT (MEAN C) -10.4 -8.1 -4.4 -5.2 -0.8 0.2 2.9 2.8 -3.3 -3.7 -4.2 -8.3 -3.5 MIXING RATIO (G/KG) 2.40 2.84 3.71 3.62 4.79 5.21 6.32 6.26 4.03 3.91 3.80 2.77 4.14 VAPOUR PRESSURE (HPA) 2.95 3.48 4.56 4.44 5.88 6.39 7.73 7.67 4.96 4.83 4.70 3.41 5.08 SATURATION DEF. (HPA) 1.42 1.81 4.02 9.40 16.47 24.50 25.52 27.39 23.49 12.04 7.88 5.18 13.26 RELATIVE HUMIDITY (MEAN %) 69 67 58 37 30 23 26 24 20 33 42 47 40 RELATIVE HUMIDITY (MAX. %) 81 79 78 58 47 37 42 37 35 51 64 62 56 RELATIVE HUMIDITY (MIN. %) 56 56 42 24 20 15 17 16 12 21 28 34 28 RELATIVE HUMIDITY (MEAN% 03UTC) 72 72 73 56 46 37 42 37 35 51 63 61 54 RELATIVE HUMIDITY (MEAN% 09UTC) 63 61 51 28 23 18 19 18 13 24 33 39 33 RELATIVE HUMIDITY (MEAN% 15UTC) 74 71 55 33 25 19 22 21 15 32 38 46 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 45.6 40.5 80.0 52.6 3.5 0.0 0.0 0.0 0.0 5.2 9.2 20.1 256.7 DAYS WITH PRECIPITATION >=10 1 1 2 2 0 0 0 0 0 0 0 1 7 DAYS WITH PRECIPITATION >= 5 1 3 3 3 0 0 0 0 0 0 1 2 13 DAYS WITH PRECIPITATION >= 1 10 5 6 4 1 0 0 0 0 2 1 2 31 DAYS WITH PRECIPITATION 14 9 10 6 2 0 0 0 0 3 2 5 51 GREATEST DAILY PRECIPITATION 28.0 18.0 47.0 33.0 3.0 0.0 0.0 0.0 0.0 3.0 9.0 14.5 47.0 DAY 5 5 14 3 12 ** ** ** ** 27 13 25 DAY WITH THUNDER STORM 0 0 1 0 1 0 0 0 0 0 0 0 2 DAYS WITH SNOW OR SLEET 9 6 7 1 0 0 0 0 0 0 1 5 29 DAYS WITH DUST 0 0 0 2 2 1 5 2 0 4 0 1 17 WIND DIRECTION (PREVAILING) 315 180 225 225 225 225 135 180 135 270 270 225 225 PREVAILING WIND SPEED(KNOTS) 10.3 8.2 8.6 9.9 7.7 6.9 8.0 8.9 7.8 11.4 8.9 6.9 7.9 PREVAILING WIND PERCENT 7.7 8.6 23.2 28.0 29.0 23.3 18.7 18.7 11.3 13.5 11.3 11.0 14.8 CALMS PERCENT OF WIND 85.2 76.4 47.1 43.3 29.7 38.0 40.6 42.6 54.0 40.0 48.0 53.5 49.7 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 282 203 227 245 246 233 122 177 188 251 256 270 227 VECTOR WIND MAGNITUDE(KNOTS) 0.5 1.0 2.5 4.6 4.0 2.8 2.3 3.2 1.8 1.8 1.5 1.7 1.8 WIND STEADINESES (MEAN %) 33.3 52.6 54.3 82.1 65.6 59.6 46.0 66.7 50.0 32.1 35.7 48.6 41.9 WIND SPEED (MEAN KNOTS) 1.5 1.9 4.6 5.6 6.1 4.7 5.0 4.8 3.6 5.6 4.2 3.5 4.3 FASTEST WIND DIRECTION 320 330 240 240 270 240 30 250 240 270 210 270 270 FASTEST WIND SPEED (KNOTS) 23 21 21 19 16 19 27 17 17 39 19 29 39 DAY 25 16 11 15 3 16 12 20 1 14 11 25 DAYS WITH SKY CLEAR (0-2)/8 15 18 13 13 27 29 18 25 30 22 18 15 243 DAYS WITH P.CLOUDY (3-6)/8 11 6 14 13 3 1 13 6 0 7 11 12 97 DAYS WITH CLOUDY (7-8)/8 5 4 4 4 1 0 0 0 0 2 1 4 25 DAYS WITH VISIBILITY =< 2 KM 5 5 1 1 0 0 0 0 0 1 0 2 15 DURATION OF SUNSHINE HOURS 198.2 219.7 234.4 161.0 ****** ****** ****** ****** 292.1 269.8 262.2 221.4 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 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 767.9 765.9 770.2 768.9 771.0 769.9 768.8 769.9 771.7 774.1 774.1 770.7 770.2 MAX. QFE PRESSURE IN HPA 775.0 773.2 777.7 774.5 776.1 775.8 773.5 774.5 776.0 778.9 780.4 778.1 780.4 DAY-HOUR 26- 6 8- 6 10- 6 25- 6 18- 6 5- 6 16- 6 4- 6 26- 6 19- 6 23- 6 5- 6 MIN. QFE PRESSURE IN HPA 762.7 757.0 764.7 762.4 762.9 765.3 762.3 766.2 767.5 768.3 768.2 759.6 757.0 DAY-HOUR 17-12 15-15 19-12 16- 9 12-15 27-12 5-12 8-12 3-15 14- 9 1-12 25-12 MEAN QNH PRESSURE IN HPA 1014.4 1011.9 1017.3 1015.6 1018.3 1017.0 1015.6 1016.9 1019.2 1022.2 1022.2 1017.9 1017.4 MAX. QNH PRESSURE IN HPA 1023.3 1021.1 1026.7 1022.7 1024.7 1024.3 1021.5 1022.7 1024.6 1028.2 1030.1 1027.2 1030.1 DAY-HOUR 26- 6 8- 6 10- 6 25- 6 18- 6 5- 6 16- 6 4- 6 26- 6 19- 6 23- 6 5- 6 MIN. QNH PRESSURE IN HPA 1007.9 1000.8 1010.4 1007.5 1008.2 1011.2 1007.4 1012.3 1013.9 1014.9 1014.8 1004.0 1000.8 DAY-HOUR 17-12 15-15 19-12 16- 9 12-15 27-12 5-12 8-12 3-15 14- 9 1-12 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 767.6 765.7 770.1 769.0 771.2 770.4 769.4 770.5 772.3 774.5 774.3 770.8 770.5 MAX. QFE PRESSURE IN HPA 774.2 772.1 776.7 774.1 775.0 775.6 773.2 773.7 775.0 778.0 779.6 777.0 779.6 DAY 20 8 10 25 18 5 16 4 26 19 23 5 MIN. QFE PRESSURE IN HPA 762.8 759.1 765.8 763.4 762.9 765.8 763.8 767.8 769.2 769.7 769.6 761.0 759.1 DAY 23 10 19 16 13 27 5 9 4 14 1 25 MEAN QNH PRESSURE IN HPA 1014.1 1011.7 1017.2 1015.8 1018.6 1017.6 1016.3 1017.7 1019.9 1022.7 1022.4 1018.1 1017.7 MAX. QNH PRESSURE IN HPA 1022.3 1019.7 1025.5 1022.2 1023.3 1024.1 1021.1 1021.7 1023.3 1027.1 1029.1 1025.8 1029.1 DAY 20 8 10 25 18 5 16 4 26 19 23 5 MIN. QNH PRESSURE IN HPA 1008.0 1003.4 1011.8 1008.8 1008.2 1011.8 1009.3 1014.3 1016.1 1016.7 1016.6 1005.8 1003.4 DAY 23 10 19 16 13 27 5 9 4 14 1 25 MEAN QFF PRESSURE IN HPA 1021.3 1016.3 1015.0 1007.3 1003.3 997.8 994.6 996.0 1002.2 1012.2 1016.1 1017.4 1008.3 MAX. QFF PRESSURE IN HPA 1035.6 1030.7 1026.5 1013.6 1009.5 1006.6 999.9 999.5 1007.2 1019.9 1024.9 1036.6 1036.6 DAY 13 8 21 4 16 1 8 4 26 19 23 29 MIN. QFF PRESSURE IN HPA 1009.1 1002.5 1007.8 998.1 996.3 989.8 986.5 992.2 996.1 1003.4 1008.4 1004.4 986.5 DAY 23 10 24 16 12 26 5 1 5 14 1 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 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 768.6 766.5 770.9 769.6 771.7 770.8 769.7 770.9 772.9 775.2 775.2 771.8 771.2 MAX. QFE PRESSURE IN HPA 775.0 773.2 777.7 774.5 776.1 775.8 773.5 774.5 776.0 778.9 780.4 778.1 780.4 DAY 26 8 10 25 18 5 16 4 26 19 23 5 MIN. QFE PRESSURE IN HPA 764.3 758.5 766.2 763.4 763.5 766.2 764.0 768.2 769.5 769.0 770.3 761.7 758.5 DAY 18 10 19 16 13 27 5 9 4 14 1 25 MEAN QNH PRESSURE IN HPA 1015.3 1012.7 1018.2 1016.6 1019.2 1018.1 1016.7 1018.2 1020.6 1023.6 1023.6 1019.3 1018.5 MAX. QNH PRESSURE IN HPA 1023.3 1021.1 1026.7 1022.7 1024.7 1024.3 1021.5 1022.7 1024.6 1028.2 1030.1 1027.2 1030.1 DAY 26 8 10 25 18 5 16 4 26 19 23 5 MIN. QNH PRESSURE IN HPA 1009.9 1002.7 1012.3 1008.8 1008.9 1012.3 1009.5 1014.8 1016.4 1015.8 1017.4 1006.7 1002.7 DAY 18 10 19 16 13 27 5 9 4 14 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 767.9 766.2 770.6 769.0 771.2 770.2 769.0 770.1 771.9 774.1 774.1 770.6 770.4 MAX. QFE PRESSURE IN HPA 774.3 772.7 777.1 774.0 775.3 775.1 773.2 773.8 775.0 777.8 779.5 776.9 779.5 DAY 26 8 10 25 18 4 16 4 26 19 23 5 MIN. QFE PRESSURE IN HPA 763.5 758.9 765.6 762.4 763.5 766.0 763.6 767.5 768.8 768.3 769.5 760.3 758.9 DAY 17 10 19 16 12 27 5 8 4 14 1 25 MEAN QNH PRESSURE IN HPA 1014.5 1012.3 1017.8 1015.9 1018.5 1017.3 1015.9 1017.2 1019.5 1022.2 1022.2 1017.8 1017.6 MAX. QNH PRESSURE IN HPA 1022.5 1020.5 1026.0 1022.1 1023.7 1023.5 1021.1 1021.8 1023.3 1026.8 1029.0 1025.7 1029.0 DAY 26 8 10 25 18 4 16 4 26 19 23 5 MIN. QNH PRESSURE IN HPA 1008.9 1003.2 1011.6 1007.5 1008.9 1012.1 1009.0 1013.9 1015.6 1014.9 1016.4 1004.9 1003.2 DAY 17 10 19 16 12 27 5 8 4 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 767.3 765.3 769.5 768.3 770.4 769.2 768.0 768.9 770.6 773.2 773.1 769.8 769.5 MAX. QFE PRESSURE IN HPA 773.6 771.4 775.5 772.5 774.0 774.4 772.2 773.6 773.8 776.5 777.9 776.2 777.9 DAY 26 8 9 25 18 4 15 4 26 19 22 5 MIN. QFE PRESSURE IN HPA 762.7 757.7 764.7 763.2 763.8 765.3 762.3 766.2 767.6 768.5 768.2 759.6 757.7 DAY 17 15 19 16 13 27 5 8 4 14 1 25 MEAN QNH PRESSURE IN HPA 1013.7 1011.2 1016.5 1014.9 1017.5 1016.0 1014.6 1015.7 1017.8 1021.0 1020.9 1016.8 1016.4 MAX. QNH PRESSURE IN HPA 1021.6 1018.8 1024.0 1020.2 1022.1 1022.6 1019.8 1021.6 1021.8 1025.2 1027.0 1024.8 1027.0 DAY 26 8 9 25 18 4 15 4 26 19 22 5 MIN. QNH PRESSURE IN HPA 1007.9 1001.6 1010.4 1008.5 1009.3 1011.2 1007.4 1012.3 1014.1 1015.2 1014.8 1004.0 1001.6 DAY 17 15 19 16 13 27 5 8 4 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 DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 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 767.9 765.7 769.8 768.5 770.5 769.1 767.9 768.9 770.7 773.7 773.8 770.5 769.8 MAX. QFE PRESSURE IN HPA 774.3 771.5 776.2 772.5 774.1 774.7 771.8 773.2 773.7 777.4 778.8 776.6 778.8 DAY 26 8 9 24 18 4 15 4 27 15 22 5 MIN. QFE PRESSURE IN HPA 762.9 757.0 765.6 763.9 762.9 765.8 762.5 766.4 767.5 769.9 768.5 760.0 757.0 DAY 17 15 19 1 12 27 5 8 3 1 1 25 MEAN QNH PRESSURE IN HPA 1014.5 1011.7 1016.9 1015.2 1017.7 1016.0 1014.5 1015.7 1017.9 1021.7 1021.8 1017.7 1016.8 MAX. QNH PRESSURE IN HPA 1022.5 1018.9 1024.8 1020.2 1022.2 1023.0 1019.3 1021.1 1021.7 1026.3 1028.1 1025.3 1028.1 DAY 26 8 9 24 18 4 15 4 27 15 22 5 MIN. QNH PRESSURE IN HPA 1008.2 1000.8 1011.6 1009.4 1008.2 1011.8 1007.7 1012.6 1013.9 1016.9 1015.2 1004.5 1000.8 DAY 17 15 19 1 12 27 5 8 3 1 1 25 MEAN QFF PRESSURE IN HPA 1021.6 1016.0 1014.3 1006.6 1002.3 996.0 992.9 993.9 1000.2 1011.3 1015.6 1017.1 1007.3 MAX. QFF PRESSURE IN HPA 1037.0 1029.8 1024.1 1015.1 1007.8 1003.3 998.5 999.7 1005.1 1018.0 1023.7 1038.3 1038.3 DAY 26 8 21 3 15 4 9 3 22 15 23 28 MIN. QFF PRESSURE IN HPA 1009.2 1000.3 1007.9 998.9 995.2 989.6 985.9 990.6 994.2 1003.0 1006.5 1003.7 985.9 DAY 1 15 24 15 12 30 5 7 5 1 1 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 DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -1.2 -1.4 5.1 12.2 16.8 22.7 26.6 25.7 19.2 11.2 6.5 -1.8 11.8 MINIMUN AIR TEMPERATURE (C) -6.2 -6.6 -0.2 4.2 7.5 12.1 15.8 14.3 10.3 5.0 0.7 -6.4 4.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 20 19 6 0 0 0 0 0 0 0 1 19 65 DAYS WITH FREEZING MIN.<= 0 29 26 15 4 0 0 0 0 0 0 14 26 114 TEMPERATURE RECORDS LOWEST(C) -16.0 -14.8 -6.5 -0.8 3.0 7.5 14.2 9.6 5.0 2.0 -4.2 -17.5 -17.5 DAY 16 14 8 13 24 1 10 28 28 17 27 28 MAXIMUM AIR TEMPERATURE (C) 3.2 2.9 9.5 17.3 21.6 28.0 32.3 31.8 27.5 18.2 13.2 3.6 17.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 2 30 28 13 0 0 0 73 DAYS WITH MAXIMUM TEMP. <= 0 4 6 0 0 0 0 0 0 0 0 0 1 11 TEMPERATURE RECORDS HIGHEST(C) 8.0 10.0 16.6 22.8 26.5 31.0 36.3 34.5 31.6 22.0 18.4 8.5 36.3 DAY 22 26 22 27 30 29 10 9 6 8 1 11 DIF. BETWEEN (MAX.-MIN.) (C) 9.4 9.5 9.7 13.1 14.1 15.9 16.5 17.5 17.2 13.2 12.5 10.0 13.2 MEAN DAILY TEMP. (MDT) (C) -1.5 -1.9 4.6 10.7 14.5 20.0 24.0 23.0 18.9 11.6 6.9 -1.4 10.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 5.2 93.8 64.5 6.3 0.0 0.0 0.0 169.9 HEATING DEG. DAYS(BASE 18 0C) 605.0 556.3 413.9 218.5 108.3 0.9 0.0 0.0 26.6 199.4 331.6 601.3 3061.7 DEWPOINT (MEAN C) -7.7 -8.5 -3.1 -4.0 -2.2 -0.2 0.9 -1.0 -3.1 0.2 -4.9 -8.3 -3.5 MIXING RATIO (G/KG) 2.94 2.82 4.17 4.00 4.38 5.03 5.49 4.77 4.07 5.22 3.51 2.93 4.11 VAPOUR PRESSURE (HPA) 3.61 3.46 5.10 4.93 5.38 6.18 6.72 5.85 5.02 6.45 4.34 3.60 5.05 SATURATION DEF. (HPA) 2.21 2.32 4.14 10.12 14.53 22.41 29.56 28.81 18.72 7.37 5.74 2.02 12.33 RELATIVE HUMIDITY (MEAN %) 64 61 59 37 30 24 21 20 26 52 48 64 42 RELATIVE HUMIDITY (MAX. %) 77 77 80 62 47 42 36 35 41 75 69 81 60 RELATIVE HUMIDITY (MIN. %) 51 47 41 21 20 15 13 11 13 31 27 47 28 RELATIVE HUMIDITY (MEAN% 03UTC) 72 73 77 61 47 42 36 35 39 70 64 69 57 RELATIVE HUMIDITY (MEAN% 09UTC) 59 57 50 27 23 18 16 14 15 35 32 59 34 RELATIVE HUMIDITY (MEAN% 15UTC) 67 63 57 30 27 20 15 14 19 44 40 62 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 31.4 34.1 56.3 19.9 0.0 2.0 0.0 0.0 2.0 30.6 12.7 130.3 319.3 DAYS WITH PRECIPITATION >=10 1 1 2 0 0 0 0 0 0 1 1 8 14 DAYS WITH PRECIPITATION >= 5 4 2 5 1 0 0 0 0 0 1 1 8 22 DAYS WITH PRECIPITATION >= 1 5 3 8 5 0 1 0 0 1 6 1 11 41 DAYS WITH PRECIPITATION 7 6 9 8 0 1 0 0 1 7 2 15 56 GREATEST DAILY PRECIPITATION 12.0 25.0 18.0 6.0 0.0 2.0 0.0 0.0 2.0 22.0 12.7 21.3 25.0 DAY 14 1 6 4 ** 22 ** ** 29 16 15 1 DAY WITH THUNDER STORM 0 0 2 1 0 3 0 0 1 3 0 5 15 DAYS WITH SNOW OR SLEET 7 7 4 0 0 0 0 0 0 0 0 13 31 DAYS WITH DUST 0 0 0 3 5 4 0 1 1 0 0 0 14 WIND DIRECTION (PREVAILING) 180 225 315 225 270 180 180 135 270 315 315 225 180 PREVAILING WIND SPEED(KNOTS) 7.7 6.3 8.6 9.9 9.9 7.5 8.3 7.3 8.6 7.0 7.3 6.8 7.1 PREVAILING WIND PERCENT 14.2 17.1 17.4 19.3 27.7 20.0 26.5 17.4 7.9 9.3 13.3 12.5 11.6 CALMS PERCENT OF WIND 62.6 58.6 34.2 30.0 32.9 32.0 36.8 41.3 56.9 58.9 58.8 62.5 49.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 239 248 240 248 2190 VECTOR WIND DIRECTION (MEAN) 209 230 246 254 284 234 194 160 219 278 252 227 239 VECTOR WIND MAGNITUDE(KNOTS) 1.5 1.5 1.4 3.2 4.2 2.4 2.0 2.0 0.2 1.0 1.2 1.6 1.5 WIND STEADINESES (MEAN %) 55.6 50.0 26.4 51.6 63.6 42.1 37.0 48.8 6.1 37.0 44.4 64.0 35.7 WIND SPEED (MEAN KNOTS) 2.7 3.0 5.3 6.2 6.6 5.7 5.4 4.1 3.3 2.7 2.7 2.5 4.2 FASTEST WIND DIRECTION 130 310 330 240 200 30 290 40 240 280 280 130 200 FASTEST WIND SPEED (KNOTS) 17 16 17 31 39 27 19 16 29 21 16 29 39 DAY 20 22 1 10 16 17 13 13 20 21 1 9 DAYS WITH SKY CLEAR (0-2)/8 12 11 8 12 20 26 31 31 29 20 21 13 234 DAYS WITH P.CLOUDY (3-6)/8 14 11 15 9 11 4 0 0 1 6 7 9 87 DAYS WITH CLOUDY (7-8)/8 5 6 8 9 0 0 0 0 0 5 2 9 44 DAYS WITH VISIBILITY =< 2 KM 6 1 2 0 1 1 0 0 1 0 0 9 21 DURATION OF SUNSHINE HOURS 193.2 201.4 197.8 261.9 333.4 334.7 366.5 360.8 314.0 230.4 232.9 175.5 3202.5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 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 768.4 768.1 767.5 770.9 769.1 769.6 768.0 769.5 773.2 774.5 773.2 768.4 770.0 MAX. QFE PRESSURE IN HPA 775.5 777.1 774.2 776.5 773.8 774.9 772.1 774.0 776.1 778.5 776.7 775.3 778.5 DAY-HOUR 13- 6 15- 9 29- 6 19- 6 9- 6 23- 6 1- 3 23- 6 17- 6 20- 6 2- 6 8- 6 MIN. QFE PRESSURE IN HPA 760.2 761.0 758.1 763.9 764.2 764.0 762.6 764.7 768.0 771.0 767.0 759.3 758.1 DAY-HOUR 25-12 8- 3 6-12 4-15 23- 3 11-12 14-12 11-12 3-15 4- 0 30-21 25-12 MEAN QNH PRESSURE IN HPA 1015.1 1014.7 1013.9 1018.2 1015.9 1016.5 1014.6 1016.4 1021.0 1022.7 1021.1 1015.1 1017.1 MAX. QNH PRESSURE IN HPA 1024.0 1026.0 1022.3 1025.2 1021.8 1023.2 1019.7 1022.1 1024.7 1027.7 1025.5 1023.7 1027.7 DAY-HOUR 13- 6 15- 9 29- 6 19- 6 9- 6 23- 6 1- 3 23- 6 17- 6 20- 6 2- 6 8- 6 MIN. QNH PRESSURE IN HPA 1004.8 1005.8 1002.1 1009.4 1009.8 1009.5 1007.8 1010.4 1014.6 1018.3 1013.3 1003.7 1002.1 DAY-HOUR 25-12 8- 3 6-12 4-15 23- 3 11-12 14-12 11-12 3-15 4- 0 30-21 25-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1002.8 1011.5 1014.5 1016.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1014.2 1018.0 1023.0 1029.5 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** 30- 3 16-21 27- 3 23-18 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 993.0 1004.9 1004.3 1003.9 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** **-** 3-12 14-21 4-12 22- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 773.2 774.2 773.2 768.2 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 775.2 777.6 775.2 773.7 ****** DAY ** ** ** ** ** ** ** ** 16 28 3 8 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 769.9 771.0 770.0 761.3 ****** DAY ** ** ** ** ** ** ** ** 4 4 5 22 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1021.1 1022.3 1021.1 1014.9 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1023.6 1026.6 1023.6 1021.7 ****** DAY ** ** ** ** ** ** ** ** 16 28 3 8 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1016.9 1018.3 1017.1 1006.2 ****** DAY ** ** ** ** ** ** ** ** 4 4 5 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1002.2 1010.6 1013.5 1015.5 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1012.1 1016.3 1018.2 1026.3 ****** DAY ** ** ** ** ** ** ** ** 30 17 27 24 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 995.3 1006.9 1004.9 1003.9 ****** DAY ** ** ** ** ** ** ** ** 4 9 5 22 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 768.4 767.9 767.4 771.1 769.4 770.2 768.8 770.3 773.6 774.6 773.5 768.5 770.3 MAX. QFE PRESSURE IN HPA 774.5 775.4 772.8 775.7 773.2 774.5 772.1 773.5 775.7 777.9 775.7 773.8 777.9 DAY 13 16 29 19 9 23 1 23 17 28 2 8 MIN. QFE PRESSURE IN HPA 760.3 761.0 759.8 765.4 764.2 764.5 763.9 766.6 770.2 771.2 770.0 760.4 759.8 DAY 26 8 7 10 23 12 14 12 8 15 6 22 MEAN QNH PRESSURE IN HPA 1015.0 1014.5 1013.8 1018.4 1016.3 1017.3 1015.5 1017.4 1021.5 1022.8 1021.5 1015.2 1017.4 MAX. QNH PRESSURE IN HPA 1022.7 1023.8 1020.6 1024.2 1021.1 1022.7 1019.7 1021.5 1024.2 1027.0 1024.2 1021.8 1027.0 DAY 13 16 29 19 9 23 1 23 17 28 2 8 MIN. QNH PRESSURE IN HPA 1004.9 1005.8 1004.3 1011.3 1009.8 1010.2 1009.4 1012.8 1017.3 1018.6 1017.1 1005.0 1004.3 DAY 26 8 7 10 23 12 14 12 8 15 6 22 MEAN QFF PRESSURE IN HPA 1018.0 1017.5 1010.0 1009.2 1002.7 998.4 993.2 996.4 1005.0 1013.1 1016.5 1017.6 1008.1 MAX. QFF PRESSURE IN HPA 1027.7 1032.4 1017.2 1015.7 1009.6 1004.8 997.3 1000.7 1014.2 1017.1 1023.0 1029.5 1032.4 DAY 13 15 17 19 25 24 1 23 30 17 27 24 MIN. QFF PRESSURE IN HPA 1008.2 1007.1 1003.2 1002.5 996.5 991.3 986.6 990.9 998.1 1008.2 1008.9 1004.3 986.6 DAY 25 21 23 10 17 12 14 11 4 15 5 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 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 769.3 768.9 768.2 771.8 769.7 770.5 769.1 770.7 774.1 775.5 774.4 769.4 771.0 MAX. QFE PRESSURE IN HPA 775.5 777.0 774.2 776.5 773.8 774.9 771.9 774.0 776.1 778.5 776.7 775.3 778.5 DAY 13 15 29 19 9 23 1 23 17 20 2 8 MIN. QFE PRESSURE IN HPA 761.6 762.0 759.4 766.0 765.1 764.7 763.9 767.0 770.5 772.0 770.6 762.3 759.4 DAY 26 8 6 12 23 12 14 11 8 15 6 22 MEAN QNH PRESSURE IN HPA 1016.2 1015.7 1014.8 1019.3 1016.7 1017.6 1015.9 1018.0 1022.2 1024.0 1022.6 1016.3 1018.3 MAX. QNH PRESSURE IN HPA 1024.0 1025.8 1022.3 1025.2 1021.8 1023.2 1019.4 1022.1 1024.7 1027.7 1025.5 1023.7 1027.7 DAY 13 15 29 19 9 23 1 23 17 20 2 8 MIN. QNH PRESSURE IN HPA 1006.5 1007.0 1003.8 1012.1 1010.9 1010.4 1009.4 1013.3 1017.7 1019.6 1017.8 1007.4 1003.8 DAY 26 8 6 12 23 12 14 11 8 15 6 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1004.0 1012.7 1016.5 1018.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1012.2 1016.7 1022.2 1028.3 ****** DAY ** ** ** ** ** ** ** ** 30 21 27 24 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 997.5 1007.7 1007.5 1007.3 ****** DAY ** ** ** ** ** ** ** ** 8 15 5 22 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 768.4 768.3 767.6 771.0 769.1 769.7 768.2 769.7 773.1 774.5 773.1 768.5 770.1 MAX. QFE PRESSURE IN HPA 773.7 777.1 773.3 775.6 773.4 774.0 770.8 773.0 775.0 777.7 775.2 774.4 777.7 DAY 12 15 29 19 9 22 5 23 17 20 2 8 MIN. QFE PRESSURE IN HPA 760.7 762.0 759.0 765.4 765.7 764.0 763.2 765.9 769.4 771.6 769.1 762.3 759.0 DAY 25 8 6 12 23 12 14 12 8 4 6 22 MEAN QNH PRESSURE IN HPA 1015.1 1014.9 1014.1 1018.3 1016.0 1016.6 1014.8 1016.7 1021.0 1022.7 1021.0 1015.1 1017.2 MAX. QNH PRESSURE IN HPA 1021.7 1026.0 1021.2 1024.1 1021.3 1022.1 1018.1 1020.8 1023.3 1026.7 1023.6 1022.6 1026.7 DAY 12 15 29 19 9 22 5 23 17 20 2 8 MIN. QNH PRESSURE IN HPA 1005.4 1007.0 1003.3 1011.3 1011.7 1009.5 1008.5 1011.9 1016.3 1019.1 1015.9 1007.4 1003.3 DAY 25 8 6 12 23 12 14 12 8 4 6 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1001.4 1010.7 1013.3 1015.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1009.5 1015.0 1018.7 1025.6 ****** DAY ** ** ** ** ** ** ** ** 30 16 27 24 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 993.7 1006.4 1005.1 1006.8 ****** DAY ** ** ** ** ** ** ** ** 8 14 6 14 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 767.7 767.4 766.9 770.0 768.5 768.7 767.0 768.4 771.9 773.6 772.2 767.6 769.2 MAX. QFE PRESSURE IN HPA 773.5 776.0 772.0 774.8 772.2 773.0 769.6 771.8 775.7 776.5 774.5 774.2 776.5 DAY 12 15 29 19 9 22 5 31 29 27 1 8 MIN. QFE PRESSURE IN HPA 760.2 761.2 758.1 764.4 765.6 764.0 762.6 764.7 768.3 771.6 768.5 759.3 758.1 DAY 25 7 6 4 5 11 14 11 3 4 6 25 MEAN QNH PRESSURE IN HPA 1014.2 1013.8 1013.1 1017.1 1015.2 1015.5 1013.3 1015.0 1019.5 1021.6 1019.8 1014.0 1016.0 MAX. QNH PRESSURE IN HPA 1021.5 1024.6 1019.6 1023.1 1019.8 1020.8 1016.6 1019.3 1024.2 1025.2 1022.7 1022.3 1025.2 DAY 12 15 29 19 9 22 5 31 29 27 1 8 MIN. QNH PRESSURE IN HPA 1004.8 1006.0 1002.1 1010.0 1011.6 1009.5 1007.8 1010.4 1014.9 1019.1 1015.2 1003.7 1002.1 DAY 25 7 6 4 5 11 14 11 3 4 6 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1000.7 1009.9 1012.3 1014.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1012.3 1013.7 1017.0 1024.1 ****** DAY ** ** ** ** ** ** ** ** 29 16 27 24 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 993.0 1005.8 1004.3 1005.0 ****** DAY ** ** ** ** ** ** ** ** 3 8 4 12 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 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 768.4 767.9 767.3 770.5 768.8 768.9 767.1 768.3 772.2 774.1 772.8 768.2 769.5 MAX. QFE PRESSURE IN HPA 774.1 776.0 772.3 774.8 772.8 773.8 769.4 772.2 775.1 777.5 775.2 774.6 777.5 DAY 12 15 29 19 8 23 1 31 29 20 2 8 MIN. QFE PRESSURE IN HPA 760.2 761.2 758.1 763.9 765.0 764.4 763.7 764.7 768.0 771.2 768.9 759.7 758.1 DAY 25 7 6 4 22 11 13 12 3 4 30 25 MEAN QNH PRESSURE IN HPA 1015.0 1014.4 1013.7 1017.7 1015.5 1015.6 1013.4 1014.9 1019.8 1022.1 1020.6 1014.8 1016.5 MAX. QNH PRESSURE IN HPA 1022.2 1024.6 1019.9 1023.1 1020.6 1021.8 1016.3 1019.8 1023.5 1026.5 1023.6 1022.8 1026.5 DAY 12 15 29 19 8 23 1 31 29 20 2 8 MIN. QNH PRESSURE IN HPA 1004.8 1006.0 1002.1 1009.4 1010.8 1010.0 1009.2 1010.4 1014.6 1018.6 1015.7 1004.2 1002.1 DAY 25 7 6 4 22 11 13 12 3 4 30 25 MEAN QFF PRESSURE IN HPA 1017.9 1017.4 1009.9 1008.3 1001.8 996.7 991.1 993.9 1003.4 1012.4 1015.6 1017.3 1007.1 MAX. QFF PRESSURE IN HPA 1028.6 1032.2 1016.1 1013.8 1006.5 1003.6 994.4 1000.1 1013.3 1017.4 1021.4 1029.4 1032.2 DAY 16 15 17 19 2 23 2 31 29 20 27 23 MIN. QFF PRESSURE IN HPA 1008.5 1007.5 999.6 1000.1 996.3 991.2 986.6 989.1 996.1 1008.2 1007.9 1004.3 986.6 DAY 25 27 6 4 28 11 23 11 3 8 4 12 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 773.6 774.8 773.5 768.7 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 775.7 778.1 776.0 774.8 ****** DAY ** ** ** ** ** ** ** ** 14 20 2 8 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 769.9 771.8 768.7 760.4 ****** DAY ** ** ** ** ** ** ** ** 3 4 30 31 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1021.6 1023.1 1021.5 1015.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1024.2 1027.2 1024.6 1023.1 ****** DAY ** ** ** ** ** ** ** ** 14 20 2 8 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1016.9 1019.3 1015.4 1005.0 ****** DAY ** ** ** ** ** ** ** ** 3 4 30 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1003.5 1011.9 1015.4 1017.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1010.7 1016.2 1021.5 1029.5 ****** DAY ** ** ** ** ** ** ** ** 30 16 26 23 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 997.1 1006.9 1007.7 1004.8 ****** DAY ** ** ** ** ** ** ** ** 3 8 4 31 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 773.7 774.5 773.2 768.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 775.5 778.0 775.6 775.0 ****** DAY ** ** ** ** ** ** ** ** 16 27 2 7 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 770.1 771.5 767.0 760.0 ****** DAY ** ** ** ** ** ** ** ** 3 3 30 31 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1021.7 1022.7 1021.1 1015.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1024.0 1027.1 1024.1 1023.3 ****** DAY ** ** ** ** ** ** ** ** 16 27 2 7 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1017.2 1018.9 1013.3 1004.5 ****** DAY ** ** ** ** ** ** ** ** 3 3 30 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1002.2 1010.6 1013.5 1015.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 1009.9 1018.0 1018.5 1026.1 ****** DAY ** ** ** ** ** ** ** ** 27 16 27 23 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** 995.2 1004.9 1004.7 1003.9 ****** DAY ** ** ** ** ** ** ** ** 3 14 4 31 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -8.4 -5.1 -2.1 7.1 12.4 18.7 24.0 21.6 17.1 11.9 6.1 -1.2 8.5 MINIMUN AIR TEMPERATURE (C) -13.7 -10.3 -7.4 1.8 6.6 11.3 15.9 13.8 8.9 3.8 0.6 -5.4 2.1 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 30 27 22 3 0 0 0 0 0 0 2 20 104 DAYS WITH FREEZING MIN.<= 0 31 28 28 11 0 0 0 0 0 1 11 29 139 TEMPERATURE RECORDS LOWEST(C) -24.6 -18.6 -17.2 -5.5 2.2 6.4 12.5 9.0 4.8 0.0 -8.6 -15.6 -24.6 DAY 26 28 11 2 14 6 11 31 12 31 27 29 MAXIMUM AIR TEMPERATURE (C) -1.8 1.1 3.5 13.3 18.4 25.4 30.3 28.3 24.3 19.7 12.2 3.7 14.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 2 20 10 0 0 0 0 32 DAYS WITH MAXIMUM TEMP. <= 0 18 10 4 0 0 0 0 0 0 0 0 5 37 TEMPERATURE RECORDS HIGHEST(C) 4.6 6.4 12.2 19.6 24.6 31.5 32.2 32.4 26.2 24.2 17.6 9.2 32.4 DAY 17 22 30 21 31 30 2 6 14 3 20 2 DIF. BETWEEN (MAX.-MIN.) (C) 11.9 11.4 10.9 11.5 11.8 14.1 14.4 14.5 15.4 15.9 11.6 9.1 12.8 MEAN DAILY TEMP. (MDT) (C) -7.8 -4.6 -2.0 7.5 12.5 18.3 23.1 21.0 16.6 11.7 6.4 -0.9 8.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 5.5 66.0 27.9 0.0 0.0 0.0 0.0 99.5 HEATING DEG. DAYS(BASE 18 0C) 798.3 656.7 619.2 302.3 169.8 21.3 0.0 4.8 44.6 194.3 348.0 584.6 3743.9 DEWPOINT (MEAN C) -14.8 -12.1 -9.0 -3.9 0.1 -0.4 0.2 0.4 -4.2 -7.1 -4.5 -8.0 -5.3 MIXING RATIO (G/KG) 1.76 2.15 2.71 3.92 5.20 5.03 5.18 5.30 3.80 3.04 3.83 2.92 3.74 VAPOUR PRESSURE (HPA) 2.16 2.63 3.33 4.81 6.39 6.17 6.35 6.51 4.69 3.76 4.73 3.59 4.59 SATURATION DEF. (HPA) 1.36 1.79 2.22 5.75 8.61 16.40 24.44 20.45 15.58 10.93 5.10 2.28 9.57 RELATIVE HUMIDITY (MEAN %) 61 59 61 50 47 31 22 27 26 29 51 62 44 RELATIVE HUMIDITY (MAX. %) 75 73 75 71 69 50 35 44 43 50 72 78 61 RELATIVE HUMIDITY (MIN. %) 48 47 47 30 27 17 14 16 14 14 32 46 29 RELATIVE HUMIDITY (MEAN% 03UTC) 65 62 67 67 62 47 35 41 39 48 65 71 56 RELATIVE HUMIDITY (MEAN% 09UTC) 54 54 53 35 34 21 16 19 17 18 37 52 34 RELATIVE HUMIDITY (MEAN% 15UTC) 64 58 59 42 40 22 16 21 18 20 48 59 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 48.5 43.5 37.8 35.4 36.8 3.1 0.0 10.0 0.0 0.0 9.8 52.5 277.4 DAYS WITH PRECIPITATION >=10 1 2 2 0 1 0 0 1 0 0 0 1 8 DAYS WITH PRECIPITATION >= 5 4 2 2 4 1 0 0 1 0 0 1 6 21 DAYS WITH PRECIPITATION >= 1 8 5 6 8 6 1 0 1 0 0 3 9 47 DAYS WITH PRECIPITATION 13 9 11 10 8 1 0 1 0 0 7 11 71 GREATEST DAILY PRECIPITATION 14.0 19.0 15.0 9.8 23.0 3.1 0.0 10.0 0.0 0.0 5.3 10.0 23.0 DAY 17 24 31 24 6 7 ** 13 ** ** 25 17 DAY WITH THUNDER STORM 0 1 0 4 6 1 1 2 0 0 1 0 16 DAYS WITH SNOW OR SLEET 12 10 10 4 0 0 0 0 0 0 1 9 46 DAYS WITH DUST 0 0 0 1 2 2 0 1 0 1 0 0 7 WIND DIRECTION (PREVAILING) 315 180 315 225 270 225 225 135 270 315 180 180 225 PREVAILING WIND SPEED(KNOTS) 8.1 9.0 7.8 8.1 9.4 8.1 6.8 7.5 9.5 7.2 9.0 6.5 7.1 PREVAILING WIND PERCENT 6.9 9.9 11.3 14.6 13.7 17.1 10.5 11.7 10.8 14.1 9.6 12.1 8.6 CALMS PERCENT OF WIND 76.6 63.4 63.3 50.0 49.6 49.6 54.0 55.2 55.8 70.6 66.3 71.0 60.5 NO. OF WIND OBSERVATION 248 232 248 240 248 240 248 248 240 248 240 248 2928 VECTOR WIND DIRECTION (MEAN) 239 219 243 246 236 243 177 109 295 307 220 206 238 VECTOR WIND MAGNITUDE(KNOTS) 0.4 1.2 1.4 2.5 2.8 2.2 0.4 0.9 0.9 1.1 1.4 1.0 1.1 WIND STEADINESES (MEAN %) 25.0 40.0 53.8 61.0 66.7 57.9 12.9 26.5 26.5 61.1 51.9 58.8 36.7 WIND SPEED (MEAN KNOTS) 1.6 3.0 2.6 4.1 4.2 3.8 3.1 3.4 3.4 1.8 2.7 1.7 3.0 FASTEST WIND DIRECTION 130 140 310 180 270 280 240 30 270 300 170 190 240 FASTEST WIND SPEED (KNOTS) 17 27 23 31 31 19 35 19 19 16 19 17 35 DAY 30 24 10 14 21 1 9 29 26 4 25 27 DAYS WITH SKY CLEAR (0-2)/8 15 18 17 11 11 25 24 26 28 30 15 10 230 DAYS WITH P.CLOUDY (3-6)/8 10 9 10 14 17 4 7 5 2 1 8 14 101 DAYS WITH CLOUDY (7-8)/8 6 2 4 5 3 1 0 0 0 0 7 7 35 DAYS WITH VISIBILITY =< 2 KM 6 3 1 0 1 0 0 0 0 0 0 5 16 DURATION OF SUNSHINE HOURS 191.8 221.4 248.8 240.5 265.9 324.2 327.2 320.9 317.8 302.2 184.5 178.9 3124.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 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 766.7 765.5 766.9 768.7 770.6 769.6 769.3 770.7 773.3 773.5 773.1 768.8 769.7 MAX. QFE PRESSURE IN HPA 776.4 772.1 773.8 774.1 776.0 776.0 773.3 775.2 776.8 778.0 779.8 775.0 779.8 DAY-HOUR 10- 6 16- 6 13- 6 21- 6 29- 6 7- 9 6- 6 16- 6 2- 6 29- 6 4- 6 1- 6 MIN. QFE PRESSURE IN HPA 755.7 757.3 758.3 761.0 764.1 764.5 764.8 765.0 769.6 767.4 763.5 764.0 755.7 DAY-HOUR 30-12 25- 0 30-21 18- 0 4-12 27-12 18-15 1-15 6-12 7-12 26- 0 28- 0 MEAN QNH PRESSURE IN HPA 1012.9 1011.4 1013.2 1015.4 1017.8 1016.6 1016.2 1018.0 1021.3 1021.5 1020.9 1015.5 1016.7 MAX. QNH PRESSURE IN HPA 1025.1 1019.7 1021.8 1022.2 1024.6 1024.6 1021.2 1023.6 1025.6 1027.1 1029.3 1023.3 1029.3 DAY-HOUR 10- 6 16- 6 13- 6 21- 6 29- 6 7- 9 6- 6 16- 6 2- 6 29- 6 4- 6 1- 6 MIN. QNH PRESSURE IN HPA 999.1 1001.1 1002.4 1005.8 1009.7 1010.2 1010.5 1010.8 1016.6 1013.8 1008.9 1009.5 999.1 DAY-HOUR 30-12 25- 0 30-21 18- 0 4-12 27-12 18-15 1-15 6-12 7-12 26- 0 28- 0 MEAN QFF PRESSURE IN HPA 1021.4 1016.1 1015.1 1008.0 1005.4 998.5 993.5 997.3 1004.9 1009.8 1014.7 1016.4 1008.4 MAX. QFF PRESSURE IN HPA 1041.3 1029.8 1031.8 1015.9 1015.0 1012.3 999.9 1008.7 1010.2 1020.5 1022.6 1030.9 1041.3 DAY-HOUR 10- 6 16-15 12-15 8- 6 14- 3 7-12 16- 3 31- 3 1- 3 30- 3 18- 3 29- 6 MIN. QFF PRESSURE IN HPA 1000.5 998.3 994.0 995.0 997.4 989.1 986.0 987.6 997.9 1000.7 1002.4 1007.0 986.0 DAY-HOUR 30-18 25- 0 30-21 18- 0 4-12 27-15 19-12 1-12 17- 9 6-12 25-21 21-21 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 766.3 765.2 766.3 768.1 770.2 769.4 769.4 770.7 773.2 773.4 772.9 768.6 769.5 MAX. QFE PRESSURE IN HPA 775.0 770.8 772.5 773.0 774.9 774.4 772.3 774.3 775.6 777.2 777.8 773.7 777.8 DAY 10 16 13 21 29 11 16 16 2 30 4 1 MIN. QFE PRESSURE IN HPA 758.3 757.3 758.3 761.0 765.4 765.6 765.3 766.8 770.7 769.6 763.5 764.0 757.3 DAY 3 25 31 18 4 28 19 19 6 7 26 28 MEAN QNH PRESSURE IN HPA 1012.4 1011.1 1012.5 1014.6 1017.4 1016.4 1016.3 1017.9 1021.1 1021.3 1020.7 1015.3 1016.4 MAX. QNH PRESSURE IN HPA 1023.3 1018.1 1020.2 1020.8 1023.2 1022.6 1019.9 1022.5 1024.1 1026.1 1026.8 1021.7 1026.8 DAY 10 16 13 21 29 11 16 16 2 30 4 1 MIN. QNH PRESSURE IN HPA 1002.4 1001.1 1002.4 1005.8 1011.3 1011.6 1011.2 1013.1 1017.9 1016.6 1008.9 1009.5 1001.1 DAY 3 25 31 18 4 28 19 19 6 7 26 28 MEAN QFF PRESSURE IN HPA 1020.0 1015.0 1014.0 1007.1 1004.7 998.3 993.5 997.0 1004.4 1009.0 1013.7 1015.5 1007.7 MAX. QFF PRESSURE IN HPA 1038.3 1025.8 1028.3 1013.7 1011.7 1006.1 997.8 1006.4 1008.5 1016.7 1019.6 1029.2 1038.3 DAY 5 16 13 8 14 8 16 31 2 30 18 29 MIN. QFF PRESSURE IN HPA 1004.1 998.3 998.1 995.0 999.1 990.9 986.1 989.8 1000.5 1003.2 1005.5 1008.4 986.1 DAY 3 25 31 18 10 28 19 1 18 6 26 9 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 766.5 765.3 766.7 768.5 770.5 769.9 769.9 771.2 773.7 773.8 773.2 768.7 769.8 MAX. QFE PRESSURE IN HPA 775.0 771.0 773.1 773.4 775.7 775.0 773.0 774.7 776.2 777.4 778.4 774.1 778.4 DAY 10 16 13 21 29 11 6 16 2 30 4 1 MIN. QFE PRESSURE IN HPA 760.8 758.9 759.2 761.7 765.0 766.0 765.1 767.3 771.0 769.6 763.9 765.0 758.9 DAY 3 25 31 18 4 28 19 1 18 7 26 4 MEAN QNH PRESSURE IN HPA 1012.7 1011.2 1013.0 1015.2 1017.7 1016.9 1016.9 1018.6 1021.7 1021.8 1021.0 1015.4 1016.8 MAX. QNH PRESSURE IN HPA 1023.3 1018.3 1021.0 1021.3 1024.2 1023.3 1020.8 1023.0 1024.8 1026.3 1027.6 1022.2 1027.6 DAY 10 16 13 21 29 11 6 16 2 30 4 1 MIN. QNH PRESSURE IN HPA 1005.5 1003.2 1003.5 1006.7 1010.8 1012.1 1010.9 1013.7 1018.3 1016.6 1009.4 1010.8 1003.2 DAY 3 25 31 18 4 28 19 1 18 7 26 4 MEAN QFF PRESSURE IN HPA 1022.6 1017.1 1016.1 1008.9 1006.2 999.5 995.3 999.1 1007.0 1012.0 1016.1 1017.4 1009.8 MAX. QFF PRESSURE IN HPA 1040.5 1029.6 1030.6 1015.4 1015.0 1006.7 999.9 1008.7 1010.2 1020.5 1022.6 1030.8 1040.5 DAY 10 16 13 8 14 7 16 31 1 30 18 29 MIN. QFF PRESSURE IN HPA 1007.4 1001.6 999.9 999.3 1000.1 991.9 988.3 991.6 1003.2 1005.6 1007.4 1009.1 988.3 DAY 17 25 31 18 4 28 19 1 18 7 26 4 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 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 767.6 766.2 767.8 769.3 771.1 770.1 770.3 771.6 774.2 774.7 774.1 769.7 770.5 MAX. QFE PRESSURE IN HPA 776.4 772.1 773.8 774.1 776.0 776.0 773.3 775.2 776.8 778.0 779.8 775.0 779.8 DAY 10 16 13 21 29 11 6 16 2 29 4 1 MIN. QFE PRESSURE IN HPA 761.7 760.0 760.3 762.3 765.3 766.0 766.0 767.9 771.2 770.2 765.2 765.4 760.0 DAY 25 11 31 18 4 27 19 1 18 7 26 30 MEAN QNH PRESSURE IN HPA 1014.1 1012.3 1014.3 1016.2 1018.4 1017.2 1017.4 1019.1 1022.4 1022.9 1022.2 1016.7 1017.8 MAX. QNH PRESSURE IN HPA 1025.1 1019.7 1021.8 1022.2 1024.6 1024.6 1021.2 1023.6 1025.6 1027.1 1029.3 1023.3 1029.3 DAY 10 16 13 21 29 11 6 16 2 29 4 1 MIN. QNH PRESSURE IN HPA 1006.7 1004.5 1004.9 1007.4 1011.2 1012.1 1012.1 1014.4 1018.6 1017.3 1011.1 1011.3 1004.5 DAY 25 11 31 18 4 27 19 1 18 7 26 30 MEAN QFF PRESSURE IN HPA 1023.3 1017.5 1016.5 1008.9 1006.0 998.8 994.6 998.1 1005.7 1011.1 1016.4 1017.9 1009.6 MAX. QFF PRESSURE IN HPA 1041.3 1029.3 1030.5 1015.9 1013.2 1007.7 998.6 1008.0 1010.0 1018.9 1021.6 1030.9 1041.3 DAY 10 16 12 8 14 11 16 31 1 30 4 29 MIN. QFF PRESSURE IN HPA 1010.1 1005.3 1001.1 998.9 999.9 991.6 988.5 991.6 1001.6 1004.0 1009.5 1009.6 988.5 DAY 31 25 31 18 4 27 19 1 18 7 26 3 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 766.8 765.7 767.5 768.8 770.7 769.8 769.6 770.9 773.4 773.5 773.0 768.8 769.9 MAX. QFE PRESSURE IN HPA 775.8 771.8 773.7 773.0 775.5 776.0 772.9 774.2 776.0 777.0 778.0 773.9 778.0 DAY 10 16 12 21 29 7 6 31 2 29 4 1 MIN. QFE PRESSURE IN HPA 759.3 759.8 761.2 762.6 764.6 765.7 765.8 767.2 770.3 768.7 764.7 764.1 759.3 DAY 30 11 31 18 4 27 19 1 17 7 26 30 MEAN QNH PRESSURE IN HPA 1013.1 1011.7 1014.0 1015.6 1018.0 1016.8 1016.6 1018.2 1021.3 1021.4 1020.8 1015.6 1016.9 MAX. QNH PRESSURE IN HPA 1024.3 1019.3 1021.7 1020.8 1024.0 1024.6 1020.7 1022.3 1024.6 1025.8 1027.1 1022.0 1027.1 DAY 10 16 12 21 29 7 6 31 2 29 4 1 MIN. QNH PRESSURE IN HPA 1003.7 1004.3 1006.0 1007.8 1010.3 1011.7 1011.8 1013.6 1017.4 1015.4 1010.4 1009.7 1003.7 DAY 30 11 31 18 4 27 19 1 17 7 26 30 MEAN QFF PRESSURE IN HPA 1020.2 1015.3 1015.1 1007.7 1005.0 998.2 993.0 996.5 1003.7 1008.7 1013.2 1015.3 1007.7 MAX. QFF PRESSURE IN HPA 1036.7 1026.7 1029.7 1013.3 1011.8 1010.3 996.4 1006.6 1008.2 1015.6 1018.5 1026.2 1036.7 DAY 10 16 12 3 14 7 12 31 1 31 18 24 MIN. QFF PRESSURE IN HPA 1008.7 1004.4 1001.2 998.5 999.0 990.4 987.1 989.5 997.9 1001.5 1006.5 1007.7 987.1 DAY 2 24 30 18 4 28 19 1 17 7 25 3 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 766.0 764.8 766.5 768.1 770.0 769.0 768.5 769.7 772.3 772.4 772.2 768.1 769.0 MAX. QFE PRESSURE IN HPA 774.2 770.5 773.2 772.4 774.3 775.7 771.7 773.2 774.8 776.0 776.7 773.0 776.7 DAY 10 16 12 21 29 7 6 31 2 29 4 11 MIN. QFE PRESSURE IN HPA 755.7 758.6 761.2 762.2 764.1 764.5 764.8 765.6 769.6 767.4 765.8 764.2 755.7 DAY 30 24 31 18 4 27 19 1 6 7 26 21 MEAN QNH PRESSURE IN HPA 1012.1 1010.5 1012.7 1014.7 1017.1 1015.8 1015.2 1016.6 1020.0 1020.1 1019.8 1014.7 1015.8 MAX. QNH PRESSURE IN HPA 1022.3 1017.7 1021.1 1020.1 1022.5 1024.2 1019.2 1021.1 1023.1 1024.6 1025.5 1020.8 1025.5 DAY 10 16 12 21 29 7 6 31 2 29 4 11 MIN. QNH PRESSURE IN HPA 999.1 1002.8 1006.0 1007.3 1009.7 1010.2 1010.5 1011.6 1016.6 1013.8 1011.8 1009.8 999.1 DAY 30 24 31 18 4 27 19 1 6 7 26 21 MEAN QFF PRESSURE IN HPA 1019.6 1014.4 1014.0 1007.1 1004.4 997.8 992.4 995.9 1003.4 1007.9 1013.0 1014.9 1007.1 MAX. QFF PRESSURE IN HPA 1034.4 1024.1 1028.7 1011.9 1010.9 1012.3 996.4 1005.4 1006.8 1015.0 1018.0 1024.3 1034.4 DAY 10 16 12 3 26 7 15 31 2 29 18 24 MIN. QFF PRESSURE IN HPA 1004.4 999.9 1002.5 999.4 997.4 989.8 986.0 987.6 998.9 1000.7 1007.4 1007.1 986.0 DAY 2 24 30 18 4 27 19 1 17 6 25 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 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 766.7 765.2 766.7 768.4 770.2 769.0 768.3 769.6 772.7 772.8 772.9 768.7 769.3 MAX. QFE PRESSURE IN HPA 774.6 770.8 773.2 772.5 774.4 773.3 771.5 773.2 775.1 776.5 777.2 773.6 777.2 DAY 9 16 12 21 29 7 6 31 21 29 4 1 MIN. QFE PRESSURE IN HPA 755.8 758.3 761.1 763.0 765.2 764.5 764.8 765.0 769.8 768.1 766.4 764.2 755.8 DAY 30 24 30 18 4 27 18 1 6 7 25 21 MEAN QNH PRESSURE IN HPA 1012.9 1011.1 1012.9 1015.0 1017.3 1015.8 1014.9 1016.5 1020.4 1020.5 1020.7 1015.5 1016.1 MAX. QNH PRESSURE IN HPA 1022.8 1018.1 1021.1 1020.2 1022.6 1021.2 1018.9 1021.1 1023.5 1025.2 1026.1 1021.6 1026.1 DAY 9 16 12 21 29 7 6 31 21 29 4 1 MIN. QNH PRESSURE IN HPA 999.3 1002.4 1005.9 1008.3 1011.1 1010.2 1010.5 1010.8 1016.8 1014.7 1012.6 1009.8 999.3 DAY 30 24 30 18 4 27 18 1 6 7 25 21 MEAN QFF PRESSURE IN HPA 1022.9 1017.0 1015.7 1008.5 1005.7 998.4 993.3 997.1 1005.8 1010.9 1015.9 1017.5 1009.1 MAX. QFF PRESSURE IN HPA 1039.2 1029.8 1031.8 1013.0 1012.5 1008.9 998.3 1006.7 1009.2 1018.3 1022.1 1028.9 1039.2 DAY 9 16 12 2 13 7 15 31 10 30 18 24 MIN. QFF PRESSURE IN HPA 1003.3 998.3 1000.8 1002.6 999.8 989.1 988.1 989.0 1002.0 1004.4 1007.3 1009.4 988.1 DAY 2 24 30 18 4 27 18 1 6 7 25 3 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 767.1 765.9 767.2 769.2 771.1 769.9 769.3 770.9 773.7 773.8 773.4 769.0 770.1 MAX. QFE PRESSURE IN HPA 775.7 771.1 773.4 773.1 774.9 774.4 772.4 774.4 776.2 777.4 777.8 773.9 777.8 DAY 9 16 12 12 29 10 6 31 21 29 4 11 MIN. QFE PRESSURE IN HPA 756.0 759.1 760.1 764.2 766.6 765.7 765.3 766.3 770.9 770.0 765.5 764.7 756.0 DAY 30 10 30 17 9 27 18 1 6 7 25 19 MEAN QNH PRESSURE IN HPA 1013.4 1012.0 1013.6 1016.1 1018.5 1017.0 1016.2 1018.2 1021.7 1021.8 1021.3 1015.8 1017.1 MAX. QNH PRESSURE IN HPA 1024.2 1018.4 1021.3 1021.0 1023.2 1022.6 1020.1 1022.6 1024.8 1026.3 1026.8 1022.0 1026.8 DAY 9 16 12 12 29 10 6 31 21 29 4 11 MIN. QNH PRESSURE IN HPA 999.5 1003.4 1004.7 1009.8 1012.8 1011.7 1011.2 1012.4 1018.2 1017.1 1011.4 1010.4 999.5 DAY 30 10 30 17 9 27 18 1 6 7 25 19 MEAN QFF PRESSURE IN HPA 1022.7 1017.3 1015.5 1008.7 1005.9 998.6 993.5 997.4 1005.2 1010.2 1015.6 1017.2 1009.0 MAX. QFF PRESSURE IN HPA 1040.1 1028.8 1030.2 1015.3 1012.6 1006.3 997.0 1007.2 1009.6 1018.5 1021.2 1029.0 1040.1 DAY 9 16 12 19 13 10 15 31 1 29 18 28 MIN. QFF PRESSURE IN HPA 1000.5 1003.9 997.2 1000.5 1000.6 991.3 987.5 989.4 1001.5 1003.2 1006.6 1008.9 987.5 DAY 30 24 30 17 9 27 18 1 6 6 25 21 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 766.8 765.8 766.9 769.0 771.0 770.0 769.6 771.3 773.7 773.8 773.1 768.8 770.0 MAX. QFE PRESSURE IN HPA 775.4 770.8 773.1 773.3 775.2 774.7 772.3 774.6 776.2 777.2 778.0 773.8 778.0 DAY 9 15 12 20 29 10 15 31 2 29 4 1 MIN. QFE PRESSURE IN HPA 757.5 758.9 758.3 762.3 766.1 766.4 765.3 767.1 771.1 770.1 764.0 764.3 757.5 DAY 30 10 30 17 6 27 18 1 5 6 25 19 MEAN QNH PRESSURE IN HPA 1013.0 1011.8 1013.1 1015.8 1018.3 1017.1 1016.6 1018.7 1021.7 1021.8 1021.0 1015.5 1017.0 MAX. QNH PRESSURE IN HPA 1023.8 1018.1 1021.0 1021.2 1023.6 1023.0 1019.9 1022.8 1024.8 1026.1 1027.1 1021.8 1027.1 DAY 9 15 12 20 29 10 15 31 2 29 4 1 MIN. QNH PRESSURE IN HPA 1001.4 1003.2 1002.4 1007.4 1012.2 1012.6 1011.2 1013.4 1018.4 1017.2 1009.5 1009.9 1001.4 DAY 30 10 30 17 6 27 18 1 5 6 25 19 MEAN QFF PRESSURE IN HPA 1020.2 1015.7 1014.1 1007.7 1005.2 998.2 993.0 997.1 1004.1 1009.1 1013.6 1015.4 1007.8 MAX. QFF PRESSURE IN HPA 1036.8 1025.8 1030.0 1014.9 1011.5 1006.5 997.0 1007.0 1008.3 1016.1 1019.6 1028.9 1036.8 DAY 9 16 12 19 13 7 12 31 1 29 30 28 MIN. QFF PRESSURE IN HPA 1001.6 1004.0 994.0 995.7 1000.7 991.2 986.5 989.0 1000.2 1003.5 1002.4 1007.0 986.5 DAY 30 24 30 17 9 27 18 1 17 6 25 21 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 M MEANS AND EXTREMES FOR THE YEAR 1993 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -6.0 -2.8 1.6 8.6 13.5 20.0 22.8 22.4 19.4 12.2 6.8 5.1 10.3 MINIMUN AIR TEMPERATURE (C) -10.7 -7.3 -2.8 3.2 7.7 11.8 15.3 14.9 11.2 4.4 0.4 -1.4 3.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 25 17 11 0 0 0 0 0 0 0 3 6 62 DAYS WITH FREEZING MIN.<= 0 31 28 25 4 0 0 0 0 0 0 15 20 123 TEMPERATURE RECORDS LOWEST(C) -19.0 -19.6 -10.4 -0.4 1.4 7.0 13.6 11.8 6.4 0.4 -6.4 -6.2 -19.6 DAY 16 18 23 28 1 6 4 28 30 8 30 16 MAXIMUM AIR TEMPERATURE (C) -0.5 2.3 6.3 14.3 19.3 26.9 29.4 29.2 26.8 18.3 11.6 10.7 16.2 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 2 11 11 1 0 0 0 25 DAYS WITH MAXIMUM TEMP. <= 0 19 7 0 0 0 0 0 0 0 0 0 0 26 TEMPERATURE RECORDS HIGHEST(C) 7.0 9.8 14.0 20.4 25.4 30.5 31.6 32.4 30.2 24.0 17.0 15.4 32.4 DAY 8 28 31 19 27 29 15 15 2 1 9 19 DIF. BETWEEN (MAX.-MIN.) (C) 10.2 9.6 9.1 11.1 11.6 15.1 14.1 14.3 15.6 13.9 11.2 12.1 12.3 MEAN DAILY TEMP. (MDT) (C) -5.6 -2.5 1.7 8.8 13.5 19.3 22.3 22.0 19.0 11.3 6.0 4.6 10.1 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 5.6 41.9 36.3 3.0 0.0 0.0 0.0 86.8 HEATING DEG. DAYS(BASE 18 0C) 731.5 573.9 504.0 277.2 140.4 13.3 0.0 0.0 11.5 206.4 359.9 414.2 3232.3 DEWPOINT (MEAN C) -12.5 -9.1 -6.0 -2.5 1.1 -2.1 0.4 0.8 -4.3 -6.4 -5.2 -5.1 -4.2 MIXING RATIO (G/KG) 2.07 2.78 3.34 4.34 5.55 4.42 5.25 5.45 3.73 3.23 3.69 3.55 3.95 VAPOUR PRESSURE (HPA) 2.55 3.41 4.10 5.33 6.82 5.44 6.44 6.70 4.60 4.00 4.54 4.38 4.86 SATURATION DEF. (HPA) 1.63 1.85 3.00 6.23 9.31 19.01 22.25 21.36 19.05 10.91 5.77 4.79 10.43 RELATIVE HUMIDITY (MEAN %) 62 64 60 51 47 25 25 26 22 30 48 53 43 RELATIVE HUMIDITY (MAX. %) 75 78 79 74 70 42 39 42 34 49 69 75 61 RELATIVE HUMIDITY (MIN. %) 48 49 42 31 27 13 14 15 11 18 32 34 28 RELATIVE HUMIDITY (MEAN% 03UTC) 64 70 67 69 63 41 38 41 32 47 65 69 56 RELATIVE HUMIDITY (MEAN% 09UTC) 56 56 52 35 34 15 16 18 14 20 42 43 33 RELATIVE HUMIDITY (MEAN% 15UTC) 62 60 58 43 37 17 18 19 16 27 46 50 38 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 71.8 101.3 112.5 119.6 37.1 0.0 0.0 2.3 0.0 0.6 47.4 2.3 494.9 DAYS WITH PRECIPITATION >=10 2 5 6 3 1 0 0 0 0 0 3 0 20 DAYS WITH PRECIPITATION >= 5 4 7 7 5 2 0 0 0 0 0 3 0 28 DAYS WITH PRECIPITATION >= 1 8 9 8 8 4 0 0 1 0 0 7 1 46 DAYS WITH PRECIPITATION 9 11 11 8 7 0 0 2 0 1 8 2 59 GREATEST DAILY PRECIPITATION 29.0 20.0 26.0 55.0 28.0 0.0 0.0 2.0 0.0 0.6 14.0 2.0 55.0 DAY 7 3 8 26 6 ** ** 24 ** 29 11 14 DAY WITH THUNDER STORM 1 2 3 2 1 0 1 2 0 0 1 0 13 DAYS WITH SNOW OR SLEET 10 13 9 4 0 0 0 0 0 0 2 1 39 DAYS WITH DUST 0 0 0 0 2 0 0 1 0 0 0 0 3 WIND DIRECTION (PREVAILING) 315 270 315 315 315 225 45 180 135 315 225 315 315 PREVAILING WIND SPEED(KNOTS) 7.6 5.2 7.1 8.9 8.5 6.2 7.8 6.5 5.4 7.9 7.6 8.0 8.1 PREVAILING WIND PERCENT 8.5 9.8 11.7 14.6 12.5 7.5 12.1 8.5 6.7 7.1 18.7 15.5 8.6 CALMS PERCENT OF WIND 80.2 59.8 56.0 47.9 55.6 63.8 58.1 65.7 71.3 65.2 57.3 67.1 62.3 NO. OF WIND OBSERVATION 248 224 248 240 248 240 248 248 240 198 150 155 2687 VECTOR WIND DIRECTION (MEAN) 295 233 258 264 252 256 104 182 243 254 240 294 258 VECTOR WIND MAGNITUDE(KNOTS) 1.0 1.2 1.5 2.6 1.8 0.8 0.6 0.2 0.2 0.7 2.4 1.9 1.1 WIND STEADINESES (MEAN %) 76.9 40.0 48.4 61.9 50.0 34.8 20.7 8.0 10.0 29.2 68.6 70.4 39.3 WIND SPEED (MEAN KNOTS) 1.3 3.0 3.1 4.2 3.6 2.3 2.9 2.5 2.0 2.4 3.5 2.7 2.8 FASTEST WIND DIRECTION 270 330 270 330 180 250 190 250 300 20 220 320 330 FASTEST WIND SPEED (KNOTS) 23 29 17 21 23 21 16 17 19 17 25 23 29 DAY 9 23 11 15 3 3 6 27 25 13 11 1 DAYS WITH SKY CLEAR (0-2)/8 18 13 13 9 10 30 25 24 27 18 11 14 212 DAYS WITH P.CLOUDY (3-6)/8 5 10 8 11 14 0 6 7 3 12 13 13 102 DAYS WITH CLOUDY (7-8)/8 8 5 10 10 7 0 0 0 0 1 6 4 51 DAYS WITH VISIBILITY =< 2 KM 3 6 2 0 0 0 0 0 0 0 0 0 11 DURATION OF SUNSHINE HOURS 194.4 201.6 212.3 244.6 ****** ****** ****** ****** ****** 257.3 200.3 215.3 ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 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 768.2 768.1 768.1 770.1 771.4 770.4 770.0 771.5 772.5 775.2 771.6 772.6 770.8 MAX. QFE PRESSURE IN HPA 775.1 772.8 776.8 777.3 775.2 775.5 774.8 775.8 777.0 780.5 776.8 779.2 780.5 DAY-HOUR 27- 6 9- 6 31- 6 18- 6 27- 6 23- 6 28- 6 31- 6 23- 6 17- 6 20- 6 26- 6 MIN. QFE PRESSURE IN HPA 759.7 760.8 761.3 765.0 766.1 766.3 765.0 765.9 768.2 770.6 763.5 765.4 759.7 DAY-HOUR 8- 9 4-12 12- 3 13-12 6- 3 25-15 13-12 12-15 28-15 3-12 14- 3 4-12 MEAN QNH PRESSURE IN HPA 1014.8 1014.7 1014.7 1017.3 1018.8 1017.5 1017.0 1019.0 1020.3 1023.5 1019.1 1020.3 1018.1 MAX. QNH PRESSURE IN HPA 1023.5 1020.6 1025.6 1026.2 1023.6 1024.0 1023.1 1024.3 1025.8 1030.2 1025.6 1028.6 1030.2 DAY-HOUR 27- 6 9- 6 31- 6 18- 6 27- 6 23- 6 28- 6 31- 6 23- 6 17- 6 20- 6 26- 6 MIN. QNH PRESSURE IN HPA 1004.2 1005.5 1006.2 1010.8 1012.2 1012.4 1010.8 1011.9 1014.8 1017.8 1008.9 1011.3 1004.2 DAY-HOUR 8- 9 4-12 12- 3 13-12 6- 3 25-15 13-12 12-15 28-15 3-12 14- 3 4-12 MEAN QFF PRESSURE IN HPA 1020.8 1017.3 1012.7 1008.5 1005.4 998.4 995.3 997.7 1001.8 1011.9 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1031.4 1031.3 1023.7 1017.8 1011.8 1005.6 1002.8 1004.7 1008.8 1019.5 ****** ****** ****** DAY-HOUR 2-15 9- 6 23- 6 1- 3 1- 6 23- 3 28- 3 28-15 18- 3 9- 3 **-** **-** MIN. QFF PRESSURE IN HPA 999.6 1002.7 1002.8 1001.5 997.3 992.4 988.4 991.0 994.3 1003.0 ****** ****** ****** DAY-HOUR 8-12 3- 0 5-18 21- 0 31-12 15- 9 14-12 13-12 3-12 3-12 **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA 767.8 767.7 767.7 769.7 771.0 770.3 770.0 771.5 772.6 774.5 ****** ****** ****** MAX. QFE PRESSURE IN HPA 774.0 772.1 775.0 776.1 774.0 774.6 774.0 775.0 775.6 776.3 ****** ****** ****** DAY 27 27 31 18 27 23 28 31 24 9 ** ** MIN. QFE PRESSURE IN HPA 760.0 761.1 762.0 765.1 766.8 767.0 766.0 767.4 769.0 772.3 ****** ****** ****** DAY 9 5 22 13 6 4 14 13 29 4 ** ** MEAN QNH PRESSURE IN HPA 1014.3 1014.2 1014.1 1016.7 1018.3 1017.4 1017.0 1018.9 1020.4 1022.7 ****** ****** ****** MAX. QNH PRESSURE IN HPA 1022.1 1019.7 1023.3 1024.7 1022.1 1022.8 1022.1 1023.3 1024.1 1025.0 ****** ****** ****** DAY 27 27 31 18 27 23 28 31 24 9 ** ** MIN. QNH PRESSURE IN HPA 1004.5 1005.9 1007.0 1010.9 1013.1 1013.3 1012.1 1013.8 1015.8 1019.9 ****** ****** ****** DAY 9 5 22 13 6 4 14 13 29 4 ** ** MEAN QFF PRESSURE IN HPA 1019.3 1016.2 1011.7 1007.4 1004.8 998.2 995.1 997.2 1001.4 1009.9 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1026.2 1027.3 1019.4 1013.8 1009.9 1004.2 1000.4 1003.2 1006.4 1016.4 ****** ****** ****** DAY 22 10 24 1 14 23 28 28 24 9 ** ** MIN. QFF PRESSURE IN HPA 1001.6 1002.7 1004.9 1001.5 999.7 994.2 989.7 991.8 996.1 1005.0 ****** ****** ****** DAY 9 3 21 21 29 15 14 13 4 3 ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 767.9 767.9 768.0 770.1 771.3 770.7 770.5 771.9 772.9 775.7 771.6 772.7 770.9 MAX. QFE PRESSURE IN HPA 774.0 772.0 775.7 776.7 774.7 775.2 774.5 775.0 776.0 779.3 776.0 778.3 779.3 DAY 27 8 31 18 27 23 28 31 23 18 21 26 MIN. QFE PRESSURE IN HPA 760.6 762.1 761.3 765.4 766.1 767.5 766.5 768.0 769.4 772.2 763.5 767.1 760.6 DAY 9 5 12 13 6 4 13 13 29 28 14 4 MEAN QNH PRESSURE IN HPA 1014.5 1014.4 1014.5 1017.2 1018.8 1018.0 1017.6 1019.5 1020.8 1024.2 1019.1 1020.5 1018.3 MAX. QNH PRESSURE IN HPA 1022.1 1019.6 1024.2 1025.5 1023.0 1023.6 1022.7 1023.3 1024.6 1028.7 1024.6 1027.5 1028.7 DAY 27 8 31 18 27 23 28 31 23 18 21 26 MIN. QNH PRESSURE IN HPA 1005.3 1007.2 1006.2 1011.3 1012.2 1013.9 1012.7 1014.6 1016.3 1019.8 1008.9 1013.4 1005.3 DAY 9 5 12 13 6 4 13 13 29 28 14 4 MEAN QFF PRESSURE IN HPA 1021.7 1017.9 1013.5 1009.4 1006.2 999.5 996.8 999.4 1003.8 1014.7 1014.3 1017.9 1009.6 MAX. QFF PRESSURE IN HPA 1029.8 1029.6 1023.0 1017.8 1011.5 1005.6 1002.8 1003.9 1008.8 1019.5 1022.4 1025.8 1029.8 DAY 2 9 23 1 15 23 28 31 18 9 30 26 MIN. QFF PRESSURE IN HPA 1005.2 1006.3 1005.7 1002.9 999.8 995.2 991.3 993.5 998.9 1007.6 1005.7 1009.3 991.3 DAY 9 3 21 26 29 15 12 13 3 3 14 3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 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 769.0 768.7 769.0 770.8 772.0 771.1 770.8 772.6 773.7 776.6 772.6 773.6 771.7 MAX. QFE PRESSURE IN HPA 775.1 772.8 776.8 777.3 775.2 775.5 774.8 775.8 777.0 780.5 776.8 779.2 780.5 DAY 27 9 31 18 27 23 28 31 23 17 20 26 MIN. QFE PRESSURE IN HPA 761.7 762.0 762.4 765.7 767.4 768.0 766.7 768.5 770.2 772.8 765.5 767.8 761.7 DAY 8 3 12 27 6 4 13 12 29 28 14 4 MEAN QNH PRESSURE IN HPA 1015.8 1015.5 1015.8 1018.0 1019.6 1018.4 1018.1 1020.3 1021.6 1025.3 1020.3 1021.5 1019.2 MAX. QNH PRESSURE IN HPA 1023.5 1020.6 1025.6 1026.2 1023.6 1024.0 1023.1 1024.3 1025.8 1030.2 1025.6 1028.6 1030.2 DAY 27 9 31 18 27 23 28 31 23 17 20 26 MIN. QNH PRESSURE IN HPA 1006.7 1007.0 1007.5 1011.7 1013.8 1014.6 1012.9 1015.2 1017.3 1020.6 1011.4 1014.3 1006.7 DAY 8 3 12 27 6 4 13 12 29 28 14 4 MEAN QFF PRESSURE IN HPA 1022.5 1018.7 1014.0 1009.5 1006.2 999.3 996.2 998.9 1003.1 1012.5 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1030.7 1031.3 1023.7 1016.9 1011.8 1005.2 1001.6 1004.2 1008.2 1018.8 ****** ****** ****** DAY 22 9 23 1 1 23 27 25 24 9 ** ** MIN. QFF PRESSURE IN HPA 1004.0 1003.9 1006.2 1002.1 1000.0 993.8 990.9 993.6 998.1 1007.3 ****** ****** ****** DAY 8 3 21 21 31 15 15 13 3 3 ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 768.4 768.4 768.6 770.3 771.6 770.6 770.1 771.8 772.7 775.4 771.7 772.4 771.0 MAX. QFE PRESSURE IN HPA 774.8 772.4 775.9 776.2 774.3 774.5 773.8 775.2 776.2 779.2 775.7 778.0 779.2 DAY 27 9 31 18 27 23 27 31 23 17 21 26 MIN. QFE PRESSURE IN HPA 759.7 761.7 761.5 765.4 767.2 767.3 765.9 767.7 769.7 771.6 766.8 766.0 759.7 DAY 8 3 12 13 6 4 13 12 29 28 14 4 MEAN QNH PRESSURE IN HPA 1015.0 1015.0 1015.3 1017.5 1019.1 1017.8 1017.2 1019.3 1020.5 1023.8 1019.3 1020.1 1018.3 MAX. QNH PRESSURE IN HPA 1023.1 1020.1 1024.5 1024.8 1022.5 1022.7 1021.8 1023.6 1024.8 1028.6 1024.2 1027.1 1028.6 DAY 27 9 31 18 27 23 27 31 23 17 21 26 MIN. QNH PRESSURE IN HPA 1004.2 1006.7 1006.4 1011.3 1013.6 1013.7 1011.9 1014.2 1016.7 1019.1 1013.1 1012.1 1004.2 DAY 8 3 12 13 6 4 13 12 29 28 14 4 MEAN QFF PRESSURE IN HPA 1020.4 1016.8 1012.5 1008.0 1005.3 998.2 994.8 997.2 1000.9 1009.8 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1028.6 1029.3 1021.8 1013.8 1011.7 1004.2 999.6 1001.9 1006.5 1015.3 ****** ****** ****** DAY 19 9 23 16 3 23 28 25 23 8 ** ** MIN. QFF PRESSURE IN HPA 1000.3 1003.4 1004.7 1002.8 997.6 992.4 989.7 991.9 995.6 1005.3 ****** ****** ****** DAY 8 3 21 22 31 15 10 21 3 2 ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 767.6 767.5 767.5 769.5 771.0 769.7 769.2 770.7 771.4 774.3 770.9 771.7 770.1 MAX. QFE PRESSURE IN HPA 773.5 771.3 774.7 775.4 773.4 773.4 773.0 774.2 774.8 778.1 774.7 777.1 778.1 DAY 27 25 31 16 27 22 27 28 23 17 20 26 MIN. QFE PRESSURE IN HPA 759.7 760.8 761.3 765.0 767.0 766.8 765.0 766.4 768.5 770.6 766.2 765.4 759.7 DAY 8 4 12 13 7 3 13 12 28 3 13 4 MEAN QNH PRESSURE IN HPA 1014.1 1013.9 1014.0 1016.4 1018.3 1016.7 1016.0 1017.9 1018.8 1022.4 1018.2 1019.2 1017.2 MAX. QNH PRESSURE IN HPA 1021.5 1018.7 1023.0 1023.8 1021.3 1021.3 1020.8 1022.3 1023.1 1027.2 1023.0 1026.0 1027.2 DAY 27 25 31 16 27 22 27 28 23 17 20 26 MIN. QNH PRESSURE IN HPA 1004.2 1005.5 1006.2 1010.8 1013.3 1013.1 1010.8 1012.6 1015.2 1017.8 1012.3 1011.3 1004.2 DAY 8 4 12 13 7 3 13 12 28 3 13 4 MEAN QFF PRESSURE IN HPA 1018.8 1015.7 1011.4 1007.2 1004.6 997.5 994.3 996.2 999.9 1008.8 ****** ****** ****** MAX. QFF PRESSURE IN HPA 1026.7 1027.1 1019.5 1012.6 1009.6 1002.8 999.3 1003.7 1005.4 1014.4 ****** ****** ****** DAY 2 9 23 16 3 22 29 28 30 8 ** ** MIN. QFF PRESSURE IN HPA 999.6 1002.9 1003.6 1001.8 997.3 993.0 988.4 991.0 994.3 1003.0 ****** ****** ****** DAY 8 3 8 12 31 15 14 13 3 3 ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 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 768.2 768.0 767.8 769.8 771.0 769.6 769.1 770.5 771.4 774.6 771.4 772.4 770.3 MAX. QFE PRESSURE IN HPA 773.7 771.7 774.7 775.7 773.4 773.2 773.4 774.4 774.8 778.1 775.2 777.9 778.1 DAY 26 9 31 16 27 22 26 28 23 17 20 26 MIN. QFE PRESSURE IN HPA 760.7 760.9 761.7 765.4 767.2 766.3 765.4 765.9 768.2 770.7 766.0 765.6 760.7 DAY 8 4 5 12 6 25 11 12 28 28 13 4 MEAN QNH PRESSURE IN HPA 1014.7 1014.5 1014.2 1016.8 1018.3 1016.6 1015.9 1017.7 1018.8 1022.9 1018.8 1020.1 1017.4 MAX. QNH PRESSURE IN HPA 1021.7 1019.2 1023.0 1024.2 1021.3 1021.1 1021.3 1022.6 1023.1 1027.2 1023.6 1027.0 1027.2 DAY 26 9 31 16 27 22 26 28 23 17 20 26 MIN. QNH PRESSURE IN HPA 1005.4 1005.7 1006.7 1011.3 1013.6 1012.4 1011.3 1011.9 1014.8 1017.9 1012.1 1011.6 1005.4 DAY 8 4 5 12 6 25 11 12 28 28 13 4 MEAN QFF PRESSURE IN HPA 1021.9 1017.9 1013.1 1009.1 1005.7 998.1 995.2 997.5 1001.9 1013.4 1014.2 1017.4 1008.8 MAX. QFF PRESSURE IN HPA 1031.4 1029.9 1022.1 1013.8 1010.2 1003.4 1001.3 1004.7 1008.0 1017.3 1021.7 1025.6 1031.4 DAY 2 9 23 16 15 22 26 28 30 17 30 26 MIN. QFF PRESSURE IN HPA 1003.0 1004.4 1004.1 1003.8 999.8 993.3 989.7 991.8 995.8 1004.8 1004.2 1009.5 989.7 DAY 8 3 5 25 31 25 9 12 3 3 10 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA 768.6 768.6 768.5 770.7 771.8 770.5 770.0 771.6 772.8 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 774.4 772.4 775.4 776.8 774.5 774.6 773.8 775.0 775.8 ****** ****** ****** ****** DAY 26 9 31 16 18 22 26 28 23 ** ** ** MIN. QFE PRESSURE IN HPA 761.3 761.7 761.7 766.0 768.2 767.2 766.2 767.2 769.7 ****** ****** ****** ****** DAY 8 3 5 12 6 3 11 12 28 ** ** ** MEAN QNH PRESSURE IN HPA 1015.4 1015.3 1015.2 1018.0 1019.3 1017.7 1017.1 1019.1 1020.5 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1022.6 1020.1 1023.8 1025.6 1022.7 1022.8 1021.8 1023.3 1024.3 ****** ****** ****** ****** DAY 26 9 31 16 18 22 26 28 23 ** ** ** MIN. QNH PRESSURE IN HPA 1006.2 1006.7 1006.7 1012.1 1014.8 1013.6 1012.3 1013.6 1016.7 ****** ****** ****** ****** DAY 8 3 5 12 6 3 11 12 28 ** ** ** MEAN QFF PRESSURE IN HPA 1021.9 1018.4 1013.3 1009.3 1005.8 998.6 995.3 997.8 1002.1 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1030.5 1030.2 1023.3 1014.7 1011.1 1004.4 1000.3 1002.7 1008.7 ****** ****** ****** ****** DAY 21 9 23 16 14 22 26 28 30 ** ** ** MIN. QFF PRESSURE IN HPA 1004.2 1004.5 1002.8 1003.1 1000.3 993.6 990.1 992.0 996.1 ****** ****** ****** ****** DAY 8 3 5 20 30 25 9 12 3 ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA 768.4 768.3 768.4 770.4 771.6 770.6 770.3 771.9 772.9 ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA 774.4 772.3 775.0 776.9 774.4 775.0 774.2 775.0 775.8 ****** ****** ****** ****** DAY 26 8 30 16 26 22 27 30 23 ** ** ** MIN. QFE PRESSURE IN HPA 761.0 761.4 762.7 766.0 767.8 767.4 766.4 767.4 770.2 ****** ****** ****** ****** DAY 8 3 5 12 6 3 11 12 28 ** ** ** MEAN QNH PRESSURE IN HPA 1015.0 1015.0 1015.0 1017.5 1019.1 1017.8 1017.5 1019.4 1020.7 ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA 1022.6 1019.9 1023.3 1025.7 1022.6 1023.3 1022.3 1023.3 1024.3 ****** ****** ****** ****** DAY 26 8 30 16 26 22 27 30 23 ** ** ** MIN. QNH PRESSURE IN HPA 1005.8 1006.3 1007.9 1012.1 1014.3 1013.8 1012.6 1013.8 1017.3 ****** ****** ****** ****** DAY 8 3 5 12 6 3 11 12 28 ** ** ** MEAN QFF PRESSURE IN HPA 1020.3 1016.7 1012.2 1007.9 1005.0 998.1 995.0 997.2 1001.2 ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA 1027.9 1028.7 1021.3 1013.8 1010.3 1004.8 1000.2 1002.3 1007.3 ****** ****** ****** ****** DAY 2 9 23 16 3 22 27 28 30 ** ** ** MIN. QFF PRESSURE IN HPA 1003.0 1004.5 1005.1 1001.6 998.2 993.1 990.2 992.1 996.0 ****** ****** ****** ****** DAY 8 3 3 20 31 14 11 12 2 ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION DARAN (40787) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 58 N LONGITUDE 50 22 E DATA PROCESSING CENTER ELEVATION 2290.0 M MEANS AND EXTREMES FOR THE YEAR 1994 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -0.1 0.9 4.6 12.3 16.1 22.5 26.8 26.7 16.7 11.0 5.2 -2.3 11.7 MINIMUN AIR TEMPERATURE (C) -5.3 -4.7 -1.7 4.9 7.8 11.9 16.7 15.7 8.7 5.5 0.9 -7.1 4.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 20 19 8 0 0 0 0 0 0 0 3 25 75 DAYS WITH FREEZING MIN.<= 0 27 26 21 2 0 0 0 0 0 0 12 29 117 TEMPERATURE RECORDS LOWEST(C) -14.4 -11.6 -10.0 -1.0 1.8 9.0 13.4 11.8 2.8 1.8 -6.6 -16.4 -16.4 DAY 28 19 16 5 7 26 1 25 23 12 18 8 MAXIMUM AIR TEMPERATURE (C) 4.4 5.4 9.3 17.3 20.9 27.6 32.4 32.1 24.0 17.4 10.9 3.5 17.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 2 29 31 1 0 0 0 63 DAYS WITH MAXIMUM TEMP. <= 0 3 1 0 0 0 0 0 0 0 0 0 6 10 TEMPERATURE RECORDS HIGHEST(C) 13.4 10.6 16.4 22.5 26.4 30.6 34.6 35.0 30.0 21.0 16.4 9.8 35.0 DAY 1 21 30 24 31 25 21 8 3 2 3 29 DIF. BETWEEN (MAX.-MIN.) (C) 9.7 10.1 11.0 12.4 13.1 15.7 15.7 16.4 15.3 11.9 10.0 10.6 12.7 MEAN DAILY TEMP. (MDT) (C) -0.4 0.4 3.8 11.1 14.4 19.8 24.6 23.9 16.3 11.4 5.9 -1.8 10.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 2.6 111.4 89.4 1.3 0.0 0.0 0.0 204.7 HEATING DEG. DAYS(BASE 18 0C) 571.6 493.3 439.6 207.0 113.4 2.6 0.0 0.0 63.6 203.1 363.0 614.8 3072.1 DEWPOINT (MEAN C) -5.7 -8.2 -4.9 -2.6 -2.5 -3.7 2.2 -0.0 -3.8 0.7 -2.7 -9.7 -3.4 MIXING RATIO (G/KG) 3.43 2.83 3.59 4.31 4.39 3.96 6.06 5.14 3.98 5.45 4.40 2.54 4.17 VAPOUR PRESSURE (HPA) 4.22 3.47 4.41 5.30 5.39 4.85 7.39 6.30 4.91 6.73 5.41 3.13 5.13 SATURATION DEF. (HPA) 2.18 3.31 4.50 9.69 13.69 23.38 29.16 30.15 15.12 6.78 3.74 2.32 12.00 RELATIVE HUMIDITY (MEAN %) 68 55 55 41 33 20 23 20 28 55 62 60 43 RELATIVE HUMIDITY (MAX. %) 84 75 79 70 57 38 40 36 44 77 81 79 63 RELATIVE HUMIDITY (MIN. %) 53 37 37 23 18 11 14 12 16 31 41 39 28 RELATIVE HUMIDITY (MEAN% 03UTC) 81 72 78 67 55 38 40 35 41 72 73 71 60 RELATIVE HUMIDITY (MEAN% 09UTC) 63 46 45 29 24 13 16 13 19 38 51 49 34 RELATIVE HUMIDITY (MEAN% 15UTC) 66 54 52 35 28 15 18 14 20 46 58 57 39 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 45.0 39.0 85.8 21.0 10.5 0.0 0.0 0.0 0.0 29.5 177.5 48.7 457.0 DAYS WITH PRECIPITATION >=10 3 1 3 0 0 0 0 0 0 0 8 2 17 DAYS WITH PRECIPITATION >= 5 3 1 4 2 0 0 0 0 0 2 9 3 24 DAYS WITH PRECIPITATION >= 1 4 5 5 6 7 0 0 0 0 8 11 9 55 DAYS WITH PRECIPITATION 7 5 8 6 8 0 0 0 0 15 14 10 73 GREATEST DAILY PRECIPITATION 17.0 28.0 44.0 6.0 2.0 0.0 0.0 0.0 0.0 7.0 48.0 13.3 48.0 DAY 5 1 12 1 4