STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -4.1 -0.4 0.7 6.8 17.5 22.3 23.3 22.9 20.0 11.1 7.6 0.4 10.7 MINIMUN AIR TEMPERATURE (C) -11.6 -6.8 -4.0 0.4 9.4 11.5 13.2 12.4 9.7 5.4 0.3 -5.4 2.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 27 16 12 8 0 0 0 0 0 0 3 18 84 DAYS WITH FREEZING MIN.<= 0 31 26 23 13 0 0 0 0 0 2 18 26 139 TEMPERATURE RECORDS LOWEST(C) -19.8 -20.0 -15.6 -9.0 5.4 8.2 10.6 6.8 3.6 -1.0 -6.2 -14.6 -20.0 DAY 9 12 22 1 7 10 3 30 29 28 30 22 MAXIMUM AIR TEMPERATURE (C) 1.5 4.9 5.3 11.4 21.8 27.3 28.5 28.7 25.7 15.5 13.0 5.5 15.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 15 10 2 0 0 0 27 DAYS WITH MAXIMUM TEMP. <= 0 11 2 0 0 0 0 0 0 0 0 0 3 16 TEMPERATURE RECORDS HIGHEST(C) 7.0 10.0 10.0 18.6 25.0 29.5 31.6 31.0 30.4 25.0 17.2 10.4 31.6 DAY 22 3 3 29 17 29 24 20 7 2 19 3 DIF. BETWEEN (MAX.-MIN.) (C) 13.1 11.7 9.3 11.0 12.4 15.8 15.3 16.3 16.0 10.1 12.7 10.9 12.9 MEAN DAILY TEMP. (MDT) (C) -5.0 -0.9 0.6 5.9 15.6 19.4 20.9 20.6 17.7 10.5 6.7 0.1 9.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 2.0 23.4 9.9 0.2 0.0 0.0 0.0 35.6 HEATING DEG. DAYS(BASE 18 0C) 714.1 505.4 539.2 363.5 74.2 3.7 4.5 2.9 34.3 233.8 340.3 555.6 3371.7 DEWPOINT (MEAN C) ***** -5.5 -4.1 -1.3 1.8 0.1 3.1 1.0 -1.6 0.4 -5.2 -6.7 ***** MIXING RATIO (G/KG) ****** 3.49 3.90 4.76 5.77 5.18 6.45 5.73 4.54 5.27 3.62 3.23 ****** VAPOUR PRESSURE (HPA) ****** 4.30 4.77 5.86 7.11 6.36 7.90 7.03 5.60 6.49 4.47 3.98 ****** SATURATION DEF. (HPA) ****** 2.04 1.95 4.61 13.48 21.51 22.05 22.11 19.09 7.35 6.52 2.62 ****** RELATIVE HUMIDITY (MEAN %) *** 71 73 61 38 26 30 28 25 53 46 63 *** RELATIVE HUMIDITY (MAX. %) *** 87 86 78 66 48 49 46 40 71 69 80 *** RELATIVE HUMIDITY (MIN. %) *** 56 58 44 24 14 20 16 17 39 29 47 *** RELATIVE HUMIDITY (MEAN% 03UTC) *** 79 79 74 65 48 49 46 40 64 67 66 *** RELATIVE HUMIDITY (MEAN% 09UTC) *** 68 70 55 28 16 24 18 19 48 35 62 *** RELATIVE HUMIDITY (MEAN% 15UTC) *** 67 70 56 34 20 25 24 21 52 42 63 *** RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 44.4 137.0 395.1 147.9 20.4 0.0 9.2 11.8 0.0 234.0 112.3 361.6 1473.7 DAYS WITH PRECIPITATION >=10 3 5 11 5 1 0 0 0 0 9 1 9 44 DAYS WITH PRECIPITATION >= 5 3 7 15 6 2 0 0 0 0 10 2 9 54 DAYS WITH PRECIPITATION >= 1 6 9 18 8 4 0 3 5 0 14 3 12 82 DAYS WITH PRECIPITATION 6 9 19 9 4 0 4 6 0 14 4 14 89 GREATEST DAILY PRECIPITATION 14.0 59.0 77.0 38.0 11.0 0.0 4.0 3.0 0.0 38.0 103.0 88.0 103.0 DAY 26 10 3 26 6 ** 28 8 ** 26 3 24 DAY WITH THUNDER STORM 2 1 4 2 0 1 3 4 0 2 0 7 26 DAYS WITH SNOW OR SLEET 5 7 17 0 0 0 0 0 0 1 0 8 38 DAYS WITH DUST 1 0 1 0 0 0 0 0 0 0 0 0 2 WIND DIRECTION (PREVAILING) 315 225 270 225 270 180 315 180 270 270 270 225 270 PREVAILING WIND SPEED(KNOTS) 8.7 7.3 7.5 6.3 5.6 4.9 7.0 6.1 7.1 7.0 8.7 10.8 7.4 PREVAILING WIND PERCENT 7.7 10.0 16.8 12.7 7.1 4.7 6.5 9.0 7.3 11.6 9.3 11.0 8.1 CALMS PERCENT OF WIND 85.2 69.3 63.2 64.7 78.7 78.7 80.0 76.8 74.7 71.6 63.3 59.4 72.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 286 263 240 226 254 267 279 218 235 264 256 246 248 VECTOR WIND MAGNITUDE(KNOTS) 0.5 1.6 2.4 1.6 0.8 0.4 0.6 0.8 1.2 1.2 1.5 2.3 1.2 WIND STEADINESES (MEAN %) 35.7 69.6 85.7 64.0 66.7 36.4 46.2 57.1 63.2 50.0 53.6 57.5 57.1 WIND SPEED (MEAN KNOTS) 1.4 2.3 2.8 2.5 1.2 1.1 1.3 1.4 1.9 2.4 2.8 4.0 2.1 FASTEST WIND DIRECTION 200 310 270 330 200 290 320 150 280 270 330 300 200 FASTEST WIND SPEED (KNOTS) 23 16 23 21 39 17 14 16 16 16 23 29 39 DAY 7 17 17 20 6 21 29 8 13 7 15 24 DAYS WITH SKY CLEAR (0-2)/8 22 16 11 18 18 27 26 23 30 15 17 17 240 DAYS WITH P.CLOUDY (3-6)/8 4 6 8 8 11 3 5 7 0 7 10 7 76 DAYS WITH CLOUDY (7-8)/8 5 6 12 4 2 0 0 1 0 9 3 7 49 DAYS WITH VISIBILITY =< 2 KM 9 4 4 1 0 0 0 0 0 0 0 7 25 DURATION OF SUNSHINE HOURS 180.1 155.3 148.0 238.7 292.5 345.0 331.6 299.3 302.5 183.2 197.4 145.5 2819.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 ****** 770.5 766.2 771.5 773.0 770.8 770.2 770.3 772.5 773.4 773.6 770.8 ****** MAX. QFE PRESSURE IN HPA ****** 778.5 772.2 776.8 776.5 776.0 773.7 775.4 778.5 778.1 778.0 778.8 ****** DAY-HOUR **-** 1- 3 2- 6 22- 6 12-12 28- 6 29-15 7- 6 26- 6 7- 6 16- 6 1- 6 MIN. QFE PRESSURE IN HPA ****** 760.7 759.5 763.1 769.3 766.2 765.4 766.8 769.2 768.5 769.3 761.2 ****** DAY-HOUR **-** 10-12 14- 3 5- 3 7-12 13-12 3-12 29-12 1-12 21-12 25-12 31- 3 MEAN QNH PRESSURE IN HPA ****** 1017.1 1011.6 1018.4 1020.2 1017.5 1016.7 1016.8 1019.6 1020.7 1021.0 1017.5 ****** MAX. QNH PRESSURE IN HPA ****** 1027.1 1019.2 1025.0 1024.6 1024.0 1021.1 1023.2 1027.1 1026.6 1026.5 1027.5 ****** DAY-HOUR **-** 1- 3 2- 6 22- 6 12-12 28- 6 29-15 7- 6 26- 6 7- 6 16- 6 1- 6 MIN. QNH PRESSURE IN HPA ****** 1004.8 1003.3 1007.8 1015.6 1011.7 1010.7 1012.5 1015.5 1014.6 1015.6 1005.4 ****** DAY-HOUR **-** 10-12 14- 3 5- 3 7-12 13-12 3-12 29-12 1-12 21-12 25-12 31- 3 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 ****** 770.8 765.8 771.5 773.0 771.2 770.6 770.7 772.8 773.3 773.8 770.7 ****** MAX. QFE PRESSURE IN HPA ****** 778.5 771.6 776.2 775.5 775.9 772.6 775.2 777.9 777.3 777.0 777.9 ****** DAY ** 1 24 30 13 28 18 7 26 17 16 1 MIN. QFE PRESSURE IN HPA ****** 763.6 759.5 763.1 770.0 766.6 766.4 767.7 770.0 769.0 770.2 761.2 ****** DAY ** 10 14 5 6 13 3 29 28 9 26 31 MEAN QNH PRESSURE IN HPA ****** 1017.5 1011.2 1018.4 1020.2 1018.0 1017.2 1017.3 1019.9 1020.6 1021.2 1017.4 ****** MAX. QNH PRESSURE IN HPA ****** 1027.1 1018.5 1024.2 1023.4 1023.9 1019.7 1023.0 1026.4 1025.6 1025.2 1026.4 ****** DAY ** 1 24 30 13 28 18 7 26 17 16 1 MIN. QNH PRESSURE IN HPA ****** 1008.4 1003.3 1007.8 1016.5 1012.2 1012.0 1013.6 1016.5 1015.2 1016.7 1005.4 ****** DAY ** 10 14 5 6 13 3 29 28 9 26 31 MEAN QFF PRESSURE IN HPA ****** 1018.8 1010.8 1013.1 1005.6 999.8 997.9 999.0 1004.7 1011.1 1016.3 1018.2 ****** MAX. QFF PRESSURE IN HPA ****** 1034.3 1025.3 1020.6 1012.4 1004.5 1005.8 1004.1 1012.6 1017.8 1027.0 1032.1 ****** DAY ** 12 24 22 13 28 30 9 30 28 30 1 MIN. QFF PRESSURE IN HPA ****** 1006.8 1002.5 1003.7 1000.9 994.4 993.3 994.7 999.7 1003.1 1006.8 1002.2 ****** DAY ** 10 14 4 22 13 26 26 28 9 7 24 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 ****** 771.2 766.6 772.0 773.4 771.5 770.8 771.1 773.5 774.4 774.6 771.8 ****** MAX. QFE PRESSURE IN HPA ****** 778.4 772.2 776.8 776.1 776.0 773.3 775.4 778.5 778.1 778.0 778.8 ****** DAY ** 1 2 22 11 28 18 7 26 7 16 1 MIN. QFE PRESSURE IN HPA ****** 762.8 759.8 763.6 769.9 766.9 766.4 767.7 770.8 769.4 771.1 762.4 ****** DAY ** 10 14 5 6 13 3 29 28 9 7 31 MEAN QNH PRESSURE IN HPA ****** 1017.9 1012.2 1019.0 1020.8 1018.4 1017.5 1017.9 1020.8 1022.0 1022.2 1018.8 ****** MAX. QNH PRESSURE IN HPA ****** 1027.0 1019.2 1025.0 1024.1 1024.0 1020.6 1023.2 1027.1 1026.6 1026.5 1027.5 ****** DAY ** 1 2 22 11 28 18 7 26 7 16 1 MIN. QNH PRESSURE IN HPA ****** 1007.4 1003.7 1008.4 1016.3 1012.6 1012.0 1013.6 1017.5 1015.7 1017.8 1006.9 ****** DAY ** 10 14 5 6 13 3 29 28 9 7 31 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 ****** 770.5 766.3 771.8 773.2 770.8 770.2 770.2 772.4 773.5 773.5 771.0 ****** MAX. QFE PRESSURE IN HPA ****** 777.8 771.3 776.1 776.1 775.3 772.4 774.5 777.3 777.4 777.1 777.2 ****** DAY ** 1 2 22 11 28 18 8 26 7 30 1 MIN. QFE PRESSURE IN HPA ****** 761.6 759.6 764.0 769.9 766.3 765.8 767.2 770.1 769.3 770.1 763.0 ****** DAY ** 10 14 5 6 13 3 29 1 21 26 31 MEAN QNH PRESSURE IN HPA ****** 1017.2 1011.8 1018.7 1020.4 1017.5 1016.7 1016.7 1019.5 1020.8 1020.9 1017.7 ****** MAX. QNH PRESSURE IN HPA ****** 1026.2 1018.1 1024.1 1024.1 1023.1 1019.5 1022.1 1025.6 1025.7 1025.4 1025.5 ****** DAY ** 1 2 22 11 28 18 8 26 7 30 1 MIN. QNH PRESSURE IN HPA ****** 1005.9 1003.4 1008.9 1016.3 1011.8 1011.2 1013.0 1016.6 1015.6 1016.6 1007.7 ****** DAY ** 10 14 5 6 13 3 29 1 21 26 31 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 ****** 769.9 766.0 771.1 772.6 770.3 769.6 769.6 771.7 772.8 772.9 770.1 ****** MAX. QFE PRESSURE IN HPA ****** 776.8 771.2 775.3 776.5 774.0 772.3 774.5 776.3 776.3 776.2 776.0 ****** DAY ** 1 24 22 12 28 29 8 26 6 15 1 MIN. QFE PRESSURE IN HPA ****** 760.7 760.0 763.7 769.3 766.2 765.4 766.8 769.2 768.5 769.3 762.4 ****** DAY ** 10 14 4 7 13 3 29 1 21 25 31 MEAN QNH PRESSURE IN HPA ****** 1016.3 1011.5 1017.9 1019.7 1016.8 1015.9 1016.0 1018.6 1019.9 1020.0 1016.6 ****** MAX. QNH PRESSURE IN HPA ****** 1025.0 1018.0 1023.1 1024.6 1021.5 1019.3 1022.1 1024.4 1024.4 1024.2 1024.0 ****** DAY ** 1 24 22 12 28 29 8 26 6 15 1 MIN. QNH PRESSURE IN HPA ****** 1004.8 1003.9 1008.6 1015.6 1011.7 1010.7 1012.5 1015.5 1014.6 1015.6 1006.9 ****** DAY ** 10 14 4 7 13 3 29 1 21 25 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 ****** 770.3 766.1 771.2 772.8 770.4 770.0 769.8 772.0 773.0 773.3 770.5 ****** MAX. QFE PRESSURE IN HPA ****** 777.5 771.0 775.3 776.1 774.2 773.7 775.0 776.3 776.5 776.9 776.6 ****** DAY ** 1 24 22 12 28 29 8 26 24 15 1 MIN. QFE PRESSURE IN HPA ****** 761.3 760.5 763.7 769.3 766.5 766.0 767.0 769.6 769.0 769.6 762.9 ****** DAY ** 10 14 4 7 12 3 29 1 21 25 30 MEAN QNH PRESSURE IN HPA ****** 1016.8 1011.6 1018.0 1019.9 1017.0 1016.4 1016.2 1019.0 1020.2 1020.7 1017.1 ****** MAX. QNH PRESSURE IN HPA ****** 1025.9 1017.7 1023.1 1024.1 1021.7 1021.1 1022.7 1024.4 1024.6 1025.1 1024.7 ****** DAY ** 1 24 22 12 28 29 8 26 24 15 1 MIN. QNH PRESSURE IN HPA ****** 1005.6 1004.6 1008.6 1015.6 1012.1 1011.5 1012.7 1016.0 1015.2 1016.0 1007.6 ****** DAY ** 10 14 4 7 12 3 29 1 21 25 30 MEAN QFF PRESSURE IN HPA ****** 1018.3 1011.3 1012.4 1005.3 998.9 997.3 997.8 1003.7 1010.8 1015.9 1017.9 ****** MAX. QFF PRESSURE IN HPA ****** 1034.8 1028.1 1019.4 1011.3 1002.5 1007.6 1004.8 1010.7 1017.3 1028.4 1029.4 ****** DAY ** 12 22 22 12 27 29 8 30 13 30 1 MIN. QFF PRESSURE IN HPA ****** 1004.6 1004.1 1000.6 999.7 995.2 991.8 994.0 997.8 1003.4 1006.6 1007.9 ****** DAY ** 10 27 19 22 13 26 25 10 4 7 13 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 KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.6 -3.5 2.2 8.4 16.6 21.0 24.8 23.5 20.2 14.9 5.9 1.4 11.0 MINIMUN AIR TEMPERATURE (C) -10.0 -9.5 -2.9 2.8 7.9 11.1 14.7 13.8 9.4 6.1 -0.2 -3.6 3.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 27 23 12 3 0 0 0 0 0 0 10 13 88 DAYS WITH FREEZING MIN.<= 0 30 27 19 5 0 0 0 0 0 0 12 25 118 TEMPERATURE RECORDS LOWEST(C) -21.6 -20.6 -12.5 -5.0 1.6 6.2 9.0 10.4 6.2 2.6 -6.8 -20.6 -21.6 DAY 20 7 16 2 8 26 1 5 1 11 25 29 MAXIMUM AIR TEMPERATURE (C) 1.2 2.1 6.1 12.0 20.7 25.8 30.2 28.8 26.5 20.6 10.6 6.0 15.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 0 20 13 3 0 0 0 36 DAYS WITH MAXIMUM TEMP. <= 0 12 8 0 0 0 0 0 0 0 0 0 2 22 TEMPERATURE RECORDS HIGHEST(C) 8.6 7.0 10.2 18.0 26.2 29.4 34.0 31.6 30.6 24.2 17.6 13.0 34.0 DAY 5 29 20 18 27 13 14 10 10 7 7 11 DIF. BETWEEN (MAX.-MIN.) (C) 11.2 11.6 9.0 9.2 12.8 14.7 15.5 15.0 17.1 14.5 10.8 9.6 12.6 MEAN DAILY TEMP. (MDT) (C) -4.4 -3.7 1.6 7.4 14.3 18.5 22.5 21.3 17.9 13.3 5.2 1.2 9.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.2 56.9 21.8 0.5 0.0 0.0 0.0 80.5 HEATING DEG. DAYS(BASE 18 0C) 694.1 630.6 508.6 317.2 114.9 11.4 1.0 0.0 22.4 145.5 372.6 521.1 3339.4 DEWPOINT (MEAN C) -8.0 -7.6 -4.6 -2.1 -1.9 -2.6 2.8 0.7 -4.5 -5.0 -5.5 -7.2 -3.8 MIXING RATIO (G/KG) 2.94 3.02 3.72 4.52 4.48 4.28 6.28 5.35 3.73 3.57 3.39 3.07 4.03 VAPOUR PRESSURE (HPA) 3.60 3.71 4.56 5.55 5.51 5.25 7.67 6.56 4.60 4.42 4.19 3.77 4.95 SATURATION DEF. (HPA) 1.35 1.41 2.85 5.91 14.15 20.51 25.12 23.59 20.52 13.29 5.68 3.48 11.49 RELATIVE HUMIDITY (MEAN %) 74 76 64 51 31 23 27 24 22 28 48 57 44 RELATIVE HUMIDITY (MAX. %) 87 89 78 69 51 41 50 42 41 48 64 74 61 RELATIVE HUMIDITY (MIN. %) 61 61 50 39 21 14 16 15 11 16 34 42 32 RELATIVE HUMIDITY (MEAN% 03UTC) 78 82 71 64 49 41 50 42 39 48 60 66 58 RELATIVE HUMIDITY (MEAN% 09UTC) 72 73 63 45 24 16 19 17 13 19 39 51 38 RELATIVE HUMIDITY (MEAN% 15UTC) 70 76 58 50 28 19 20 19 15 23 44 54 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 263.1 388.1 554.2 126.2 20.3 0.2 0.4 0.0 0.0 0.5 303.0 294.4 1950.4 DAYS WITH PRECIPITATION >=10 6 10 8 7 1 0 0 0 0 0 6 8 46 DAYS WITH PRECIPITATION >= 5 7 10 8 9 2 0 0 0 0 0 6 9 51 DAYS WITH PRECIPITATION >= 1 15 11 10 12 3 0 0 0 0 0 7 12 70 DAYS WITH PRECIPITATION 18 13 14 13 4 1 1 0 0 2 7 15 88 GREATEST DAILY PRECIPITATION 56.0 104.0 145.0 26.0 14.0 0.2 0.4 0.0 0.0 0.3 115.0 76.0 145.0 DAY 29 2 5 26 2 2 28 ** ** 16 13 26 DAY WITH THUNDER STORM 1 5 7 6 2 0 1 0 0 0 4 5 31 DAYS WITH SNOW OR SLEET 15 12 10 2 0 0 0 0 0 0 6 13 58 DAYS WITH DUST 0 0 0 3 2 1 1 0 1 0 0 0 8 WIND DIRECTION (PREVAILING) 270 225 270 270 270 225 225 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 11.6 8.3 8.9 8.9 7.7 7.0 6.5 7.6 7.4 8.7 9.1 10.1 8.5 PREVAILING WIND PERCENT 11.0 9.0 20.6 29.3 18.7 15.3 16.8 14.8 16.1 14.8 19.5 20.0 16.2 CALMS PERCENT OF WIND 75.5 69.7 44.5 35.3 41.3 55.3 58.1 51.6 61.1 54.8 51.0 49.0 53.9 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 149 155 149 155 1828 VECTOR WIND DIRECTION (MEAN) 258 246 246 268 277 257 235 234 257 270 256 249 256 VECTOR WIND MAGNITUDE(KNOTS) 1.9 1.5 3.5 4.3 2.6 2.2 1.6 1.8 2.1 2.4 3.3 3.8 2.5 WIND STEADINESES (MEAN %) 76.0 62.5 70.0 72.9 56.5 71.0 57.1 51.4 75.0 61.5 73.3 73.1 65.8 WIND SPEED (MEAN KNOTS) 2.5 2.4 5.0 5.9 4.6 3.1 2.8 3.5 2.8 3.9 4.5 5.2 3.8 FASTEST WIND DIRECTION 240 160 180 300 300 170 330 270 310 330 210 270 300 FASTEST WIND SPEED (KNOTS) 23 25 29 35 21 19 23 21 16 21 29 17 35 DAY 16 2 9 30 1 2 25 30 2 22 28 27 DAYS WITH SKY CLEAR (0-2)/8 11 14 14 10 24 27 29 28 29 24 14 15 239 DAYS WITH P.CLOUDY (3-6)/8 11 8 9 7 4 3 2 3 1 7 9 5 69 DAYS WITH CLOUDY (7-8)/8 9 7 8 13 3 0 0 0 0 0 7 11 58 DAYS WITH VISIBILITY =< 2 KM 14 15 4 1 0 0 0 0 0 0 3 4 41 DURATION OF SUNSHINE HOURS 119.4 139.2 191.2 187.4 304.4 292.6 351.5 336.0 302.9 263.7 168.8 142.2 2799.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 768.1 767.2 767.0 770.0 771.5 769.3 767.3 768.7 771.8 774.0 772.9 769.7 769.8 MAX. QFE PRESSURE IN HPA 775.9 773.4 772.9 775.5 774.4 774.7 774.6 773.2 777.0 779.3 779.1 776.4 779.3 DAY-HOUR 3- 6 7- 6 17- 6 12- 9 4-12 12- 6 31- 6 1- 3 15- 6 28- 6 6- 6 5- 6 MIN. QFE PRESSURE IN HPA 762.0 760.0 760.4 765.0 767.3 763.7 763.4 765.2 768.4 769.7 766.9 755.2 755.2 DAY-HOUR 19- 3 2- 3 5- 3 25-15 1- 3 30-15 18-12 23- 9 3-12 7-12 30-12 27- 3 MEAN QNH PRESSURE IN HPA 1014.1 1013.0 1012.7 1016.4 1018.3 1015.6 1013.0 1014.8 1018.7 1021.4 1020.1 1016.1 1016.2 MAX. QNH PRESSURE IN HPA 1023.9 1020.7 1020.1 1023.4 1022.0 1022.4 1022.2 1020.5 1025.2 1028.1 1027.9 1024.5 1028.1 DAY-HOUR 3- 6 7- 6 17- 6 12- 9 4-12 12- 6 31- 6 1- 3 15- 6 28- 6 6- 6 5- 6 MIN. QNH PRESSURE IN HPA 1006.4 1003.9 1004.4 1010.2 1013.1 1008.6 1008.2 1010.5 1014.5 1016.1 1012.6 997.9 997.9 DAY-HOUR 19- 3 2- 3 5- 3 25-15 1- 3 30-15 18-12 23- 9 3-12 7-12 30-12 27- 3 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 767.8 767.0 766.6 769.7 771.3 769.6 767.8 769.2 772.4 774.3 772.9 769.5 769.8 MAX. QFE PRESSURE IN HPA 774.8 772.2 772.0 773.3 773.5 774.2 774.2 773.2 776.9 777.9 778.1 775.4 778.1 DAY 3 7 17 9 17 13 31 1 15 28 6 4 MIN. QFE PRESSURE IN HPA 762.0 760.0 760.4 765.3 767.3 764.4 764.1 766.1 769.7 770.4 767.5 755.2 755.2 DAY 19 2 5 25 1 30 18 25 4 31 29 27 MEAN QNH PRESSURE IN HPA 1013.7 1012.6 1012.2 1016.1 1018.1 1016.0 1013.6 1015.5 1019.4 1021.9 1020.0 1015.9 1016.3 MAX. QNH PRESSURE IN HPA 1022.5 1019.2 1019.0 1020.6 1020.8 1021.7 1021.7 1020.5 1025.1 1026.4 1026.6 1023.2 1026.6 DAY 3 7 17 9 17 13 31 1 15 28 6 4 MIN. QNH PRESSURE IN HPA 1006.4 1003.9 1004.4 1010.6 1013.1 1009.4 1009.1 1011.6 1016.1 1017.0 1013.3 997.9 997.9 DAY 19 2 5 25 1 30 18 25 4 31 29 27 MEAN QFF PRESSURE IN HPA 1018.5 1017.9 1010.9 1009.5 1004.6 998.8 993.0 996.2 1004.1 1010.9 1016.4 1016.0 1008.1 MAX. QFF PRESSURE IN HPA 1032.9 1035.8 1024.1 1019.4 1012.3 1004.2 1000.9 1000.0 1008.4 1016.7 1024.5 1037.6 1037.6 DAY 3 7 17 3 8 4 31 1 25 24 16 30 MIN. QFF PRESSURE IN HPA 1006.6 997.7 1001.1 999.6 998.5 993.0 987.4 991.3 999.1 1004.4 1008.4 996.9 987.4 DAY 26 2 9 25 29 30 18 3 12 13 28 26 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 768.7 768.0 767.7 770.5 771.9 769.9 768.0 769.6 772.9 775.1 774.0 770.5 770.6 MAX. QFE PRESSURE IN HPA 775.9 773.4 772.9 774.9 774.2 774.7 774.6 773.2 777.0 779.3 779.1 776.4 779.3 DAY 3 7 17 12 17 12 31 1 15 28 6 5 MIN. QFE PRESSURE IN HPA 763.0 762.1 762.0 766.3 768.9 764.4 764.5 766.7 770.0 770.8 768.4 756.9 756.9 DAY 19 2 5 25 1 30 18 24 3 31 29 27 MEAN QNH PRESSURE IN HPA 1014.8 1014.0 1013.5 1017.1 1018.9 1016.4 1013.9 1015.9 1020.1 1022.8 1021.5 1017.1 1017.2 MAX. QNH PRESSURE IN HPA 1023.9 1020.7 1020.1 1022.6 1021.7 1022.4 1022.2 1020.5 1025.2 1028.1 1027.9 1024.5 1028.1 DAY 3 7 17 12 17 12 31 1 15 28 6 5 MIN. QNH PRESSURE IN HPA 1007.7 1006.6 1006.4 1011.8 1015.1 1009.4 1009.6 1012.3 1016.5 1017.5 1014.5 1000.0 1000.0 DAY 19 2 5 25 1 30 18 24 3 31 29 27 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 768.4 767.7 767.4 770.4 771.7 769.5 767.2 768.6 771.8 773.9 773.0 769.8 769.9 MAX. QFE PRESSURE IN HPA 775.2 772.9 772.6 775.5 774.2 774.2 773.2 771.9 775.6 777.7 777.4 775.2 777.7 DAY 10 7 17 12 2 12 31 21 15 28 3 5 MIN. QFE PRESSURE IN HPA 763.2 761.7 762.4 766.0 769.5 764.2 763.8 765.2 769.2 770.2 767.8 756.6 756.6 DAY 18 3 5 25 1 30 18 23 17 7 29 27 MEAN QNH PRESSURE IN HPA 1014.4 1013.5 1013.2 1016.9 1018.6 1015.8 1013.0 1014.7 1018.7 1021.3 1020.2 1016.2 1016.4 MAX. QNH PRESSURE IN HPA 1023.0 1020.1 1019.7 1023.4 1021.7 1021.7 1020.5 1018.8 1023.5 1026.1 1025.7 1023.0 1026.1 DAY 10 7 17 12 2 12 31 21 15 28 3 5 MIN. QNH PRESSURE IN HPA 1007.9 1006.1 1006.9 1011.5 1015.8 1009.2 1008.7 1010.5 1015.5 1016.7 1013.7 999.7 999.7 DAY 18 3 5 25 1 30 18 23 17 7 29 27 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 767.8 766.7 766.6 769.6 771.2 768.9 766.7 768.0 770.9 773.1 772.2 769.0 769.2 MAX. QFE PRESSURE IN HPA 774.2 772.0 771.4 773.8 774.4 773.3 771.9 771.1 774.3 776.6 776.6 774.1 776.6 DAY 10 20 17 12 4 12 31 21 14 28 5 5 MIN. QFE PRESSURE IN HPA 762.7 761.1 760.9 765.4 768.8 764.1 763.4 765.2 768.4 769.7 766.9 756.9 756.9 DAY 26 2 23 25 24 30 18 23 3 7 30 27 MEAN QNH PRESSURE IN HPA 1013.7 1012.3 1012.2 1016.0 1018.0 1015.1 1012.3 1014.0 1017.6 1020.3 1019.2 1015.2 1015.5 MAX. QNH PRESSURE IN HPA 1021.7 1019.0 1018.2 1021.2 1022.0 1020.6 1018.8 1017.8 1021.9 1024.7 1024.7 1021.6 1024.7 DAY 10 20 17 12 4 12 31 21 14 28 5 5 MIN. QNH PRESSURE IN HPA 1007.3 1005.3 1005.1 1010.7 1015.0 1009.1 1008.2 1010.5 1014.5 1016.1 1012.6 1000.0 1000.0 DAY 26 2 23 25 24 30 18 23 3 7 30 27 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 768.1 766.9 766.7 769.6 771.3 768.8 766.7 768.0 771.0 773.6 772.7 769.6 769.4 MAX. QFE PRESSURE IN HPA 775.5 772.1 771.2 774.4 773.5 772.9 772.6 771.1 774.6 777.0 777.1 774.6 777.1 DAY 10 6 17 13 4 12 31 21 14 16 5 5 MIN. QFE PRESSURE IN HPA 763.0 761.1 761.4 765.0 769.3 763.7 763.8 765.5 768.7 770.1 767.3 760.0 760.0 DAY 18 2 23 25 23 30 18 2 3 7 30 27 MEAN QNH PRESSURE IN HPA 1014.0 1012.5 1012.3 1016.0 1018.1 1015.0 1012.4 1014.0 1017.7 1020.9 1019.8 1016.0 1015.7 MAX. QNH PRESSURE IN HPA 1023.4 1019.1 1018.0 1022.0 1020.8 1020.1 1019.7 1017.8 1022.2 1025.2 1025.4 1022.2 1025.4 DAY 10 6 17 13 4 12 31 21 14 16 5 5 MIN. QNH PRESSURE IN HPA 1007.7 1005.3 1005.7 1010.2 1015.6 1008.6 1008.7 1010.8 1014.8 1016.6 1013.1 1003.9 1003.9 DAY 18 2 23 25 23 30 18 2 3 7 30 27 MEAN QFF PRESSURE IN HPA 1018.7 1017.6 1010.8 1009.2 1004.6 997.8 991.8 995.0 1002.5 1010.1 1016.2 1016.1 1007.5 MAX. QFF PRESSURE IN HPA 1033.5 1034.8 1024.3 1019.5 1011.4 1002.9 999.3 998.9 1006.3 1015.7 1023.1 1038.2 1038.2 DAY 20 7 15 3 8 1 31 31 24 28 15 29 MIN. QFF PRESSURE IN HPA 1007.2 1000.7 999.6 1000.2 1000.0 992.7 987.4 990.3 998.7 1004.9 1008.8 1002.0 987.4 DAY 26 2 3 30 22 30 16 2 11 1 28 26 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 KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -8.4 -6.3 1.1 8.0 13.8 20.4 23.1 22.8 18.0 12.8 6.4 -2.5 9.1 MINIMUN AIR TEMPERATURE (C) -15.3 -13.4 -4.2 1.2 6.5 10.3 14.1 14.2 9.5 4.7 0.4 -9.0 1.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 1 0 0 0 0 1 DAYS WITH MINIMUM TEMP. <=-4 30 22 17 3 0 0 0 0 0 0 2 22 96 DAYS WITH FREEZING MIN.<= 0 31 27 25 10 0 0 0 0 0 1 14 27 135 TEMPERATURE RECORDS LOWEST(C) -27.0 -26.6 -17.0 -10.5 2.0 6.2 10.4 10.4 4.4 -0.4 -4.5 -18.0 -27.0 DAY 31 7 31 2 1 13 8 19 30 24 5 17 MAXIMUM AIR TEMPERATURE (C) -2.3 -0.1 5.7 12.5 19.8 27.7 30.2 29.9 25.6 20.7 10.3 3.5 15.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 7 16 15 3 0 0 0 41 DAYS WITH MAXIMUM TEMP. <= 0 26 16 2 0 0 0 0 0 0 0 0 4 48 TEMPERATURE RECORDS HIGHEST(C) 4.8 8.0 9.0 18.5 27.0 32.4 33.8 31.6 30.8 26.4 15.2 8.6 33.8 DAY 20 28 8 17 30 26 10 26 1 9 4 1 DIF. BETWEEN (MAX.-MIN.) (C) 13.0 13.3 9.9 11.3 13.3 17.4 16.1 15.7 16.1 16.0 9.9 12.5 13.7 MEAN DAILY TEMP. (MDT) (C) -8.8 -6.8 0.7 6.8 13.2 19.0 22.2 22.0 17.6 12.7 5.4 -2.8 8.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 6.1 45.9 34.9 4.2 0.0 0.0 0.0 91.2 HEATING DEG. DAYS(BASE 18 0C) 830.9 693.7 534.8 334.7 150.0 10.4 0.0 0.0 44.3 164.5 379.2 643.8 3786.4 DEWPOINT (MEAN C) -13.4 -12.0 -4.5 -1.3 -1.0 -3.1 0.6 0.3 -3.7 -4.7 -3.0 -7.5 -4.5 MIXING RATIO (G/KG) 1.95 2.23 3.68 4.76 4.79 4.10 5.33 5.17 3.99 3.60 4.18 3.09 3.91 VAPOUR PRESSURE (HPA) 2.39 2.74 4.50 5.86 5.89 5.04 6.53 6.35 4.91 4.45 5.16 3.80 4.80 SATURATION DEF. (HPA) 1.14 1.56 2.39 5.29 10.84 20.18 22.91 22.41 16.97 11.27 4.68 1.69 10.11 RELATIVE HUMIDITY (MEAN %) 69 66 68 56 42 23 25 24 25 32 56 71 46 RELATIVE HUMIDITY (MAX. %) 82 82 85 74 70 44 43 42 42 52 74 85 65 RELATIVE HUMIDITY (MIN. %) 53 52 54 37 23 11 14 14 13 18 40 56 32 RELATIVE HUMIDITY (MEAN% 03UTC) 75 75 81 72 63 43 42 40 41 49 69 78 61 RELATIVE HUMIDITY (MEAN% 09UTC) 67 60 63 45 28 13 17 16 15 23 48 63 38 RELATIVE HUMIDITY (MEAN% 15UTC) 66 63 66 48 30 15 16 17 19 24 56 70 41 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 195.9 135.1 231.1 39.5 89.5 0.0 0.0 0.0 0.0 6.3 225.0 332.2 1254.6 DAYS WITH PRECIPITATION >=10 8 4 9 2 3 0 0 0 0 0 6 8 40 DAYS WITH PRECIPITATION >= 5 8 6 10 2 3 0 0 0 0 1 7 8 45 DAYS WITH PRECIPITATION >= 1 13 10 12 5 4 0 0 0 0 1 11 9 65 DAYS WITH PRECIPITATION 14 10 15 10 6 0 0 0 0 2 11 10 78 GREATEST DAILY PRECIPITATION 47.0 71.0 34.0 22.0 40.0 0.0 0.0 0.0 0.0 6.0 49.0 142.0 142.0 DAY 23 19 10 23 7 ** ** ** ** 31 7 4 DAY WITH THUNDER STORM 0 1 10 2 1 0 0 0 0 0 4 2 20 DAYS WITH SNOW OR SLEET 14 12 9 1 0 0 0 0 0 0 3 7 46 DAYS WITH DUST 0 1 2 0 0 0 0 0 0 1 0 0 4 WIND DIRECTION (PREVAILING) 270 225 225 270 270 270 270 225 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.6 10.5 9.7 7.1 7.0 7.0 7.4 7.6 8.8 7.4 9.0 10.4 7.9 PREVAILING WIND PERCENT 5.8 7.9 16.8 32.2 14.9 16.7 11.7 16.1 19.2 16.1 19.3 11.6 14.8 CALMS PERCENT OF WIND 81.9 75.7 58.7 47.8 60.1 54.2 55.6 58.5 54.6 68.1 52.0 74.8 60.9 NO. OF WIND OBSERVATION 155 140 155 180 248 240 248 248 240 248 150 155 2407 VECTOR WIND DIRECTION (MEAN) 268 256 239 265 278 260 233 237 252 262 270 250 257 VECTOR WIND MAGNITUDE(KNOTS) 0.8 1.8 2.7 2.9 2.1 2.0 1.0 1.7 2.6 1.8 2.7 1.9 2.0 WIND STEADINESES (MEAN %) 53.3 75.0 69.2 82.9 80.8 69.0 34.5 54.8 74.3 78.3 67.5 76.0 69.0 WIND SPEED (MEAN KNOTS) 1.5 2.4 3.9 3.5 2.6 2.9 2.9 3.1 3.5 2.3 4.0 2.5 2.9 FASTEST WIND DIRECTION 270 240 160 300 320 120 90 210 290 210 180 240 160 FASTEST WIND SPEED (KNOTS) 16 27 35 16 23 23 23 27 23 16 29 29 35 DAY 17 11 28 29 12 10 23 20 19 31 16 1 DAYS WITH SKY CLEAR (0-2)/8 19 16 12 11 22 29 31 27 28 22 15 21 253 DAYS WITH P.CLOUDY (3-6)/8 7 7 9 14 3 1 0 4 2 9 10 5 71 DAYS WITH CLOUDY (7-8)/8 5 5 10 5 6 0 0 0 0 0 5 5 41 DAYS WITH VISIBILITY =< 2 KM 9 10 7 0 0 0 0 0 0 1 0 1 28 DURATION OF SUNSHINE HOURS 134.6 154.0 169.0 235.7 304.3 366.1 359.1 322.1 301.2 256.2 159.3 157.7 2919.3 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 766.5 768.5 767.0 771.5 771.9 770.0 770.2 770.0 771.5 774.2 772.7 769.5 770.3 MAX. QFE PRESSURE IN HPA 771.6 773.9 772.8 776.6 774.3 774.0 774.0 774.2 778.0 779.3 777.8 774.6 779.3 DAY-HOUR 22- 6 8- 6 8- 6 9- 6 24- 6 4- 6 20- 6 26- 6 24- 6 27- 6 29- 6 19- 6 MIN. QFE PRESSURE IN HPA 760.4 759.9 757.0 767.6 768.7 766.7 766.0 764.4 767.7 770.4 769.1 763.0 757.0 DAY-HOUR 11-15 14- 3 15-15 23- 0 31-21 10-21 31-15 1-15 12-12 1-12 16-12 4-12 MEAN QNH PRESSURE IN HPA 1012.1 1014.6 1012.7 1018.3 1018.8 1016.5 1016.7 1016.5 1018.3 1021.7 1019.9 1015.9 1016.8 MAX. QNH PRESSURE IN HPA 1018.5 1021.3 1020.0 1024.7 1021.9 1021.5 1021.5 1021.7 1026.5 1028.1 1026.2 1022.2 1028.1 DAY-HOUR 22- 6 8- 6 8- 6 9- 6 24- 6 4- 6 20- 6 26- 6 24- 6 27- 6 29- 6 19- 6 MIN. QNH PRESSURE IN HPA 1004.4 1003.8 1000.2 1013.5 1014.8 1012.3 1011.5 1009.4 1013.6 1017.0 1015.3 1007.7 1000.2 DAY-HOUR 11-15 14- 3 15-15 23- 0 31-21 10-21 31-15 1-15 12-12 1-12 16-12 4-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.3 997.2 994.8 994.9 1001.0 1009.2 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.8 1004.1 1001.0 1001.8 1013.5 1018.0 ****** ****** ****** DAY-HOUR **-** **-** **-** **-** 13- 3 4- 3 9- 3 19- 3 24- 3 27- 6 **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 995.5 989.5 988.7 987.7 993.2 1001.4 ****** ****** ****** DAY-HOUR **-** **-** **-** **-** 31-21 30-21 5-21 1-21 5-21 10-12 **-** **-** PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 771.7 769.8 770.3 770.0 771.4 774.0 ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 773.6 773.3 773.2 773.1 776.7 777.9 ****** ****** ****** DAY ** ** ** ** 25 4 20 27 24 27 ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 769.7 766.7 767.2 765.0 768.0 770.7 ****** ****** ****** DAY ** ** ** ** 11 11 6 2 12 2 ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1018.5 1016.3 1016.8 1016.5 1018.3 1021.5 ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1021.0 1020.6 1020.5 1020.3 1024.9 1026.4 ****** ****** ****** DAY ** ** ** ** 25 4 20 27 24 27 ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1016.1 1012.3 1013.0 1010.2 1014.0 1017.3 ****** ****** ****** DAY ** ** ** ** 11 11 6 2 12 2 ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.0 997.3 994.9 994.8 1000.6 1008.5 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1011.9 1002.6 999.6 998.9 1010.7 1014.9 ****** ****** ****** DAY ** ** ** ** 13 4 9 9 24 27 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 999.4 992.1 990.3 988.9 995.2 1003.1 ****** ****** ****** DAY ** ** ** ** 31 30 15 2 6 10 ** ** PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 766.4 768.0 766.9 771.6 772.0 770.2 770.8 770.6 771.9 774.6 772.6 769.5 770.4 MAX. QFE PRESSURE IN HPA 770.7 773.0 772.3 775.7 774.2 773.6 773.8 773.5 777.3 778.4 776.8 774.1 778.4 DAY 22 8 1 9 25 4 20 8 24 27 29 19 MIN. QFE PRESSURE IN HPA 760.5 759.9 758.4 768.0 769.9 766.9 767.7 765.6 768.3 771.1 769.6 765.3 758.4 DAY 12 14 30 23 11 11 6 2 13 2 12 5 MEAN QNH PRESSURE IN HPA 1011.9 1014.0 1012.6 1018.5 1019.0 1016.7 1017.4 1017.2 1018.8 1022.2 1019.7 1015.9 1017.0 MAX. QNH PRESSURE IN HPA 1017.3 1020.2 1019.3 1023.6 1021.7 1021.0 1021.2 1020.8 1025.6 1027.0 1025.0 1021.6 1027.0 DAY 22 8 1 9 25 4 20 8 24 27 29 19 MIN. QNH PRESSURE IN HPA 1004.6 1003.8 1001.9 1014.0 1016.3 1012.6 1013.6 1011.0 1014.3 1017.8 1016.0 1010.6 1001.9 DAY 12 14 30 23 11 11 6 2 13 2 12 5 MEAN QFF PRESSURE IN HPA 1021.9 1023.2 1012.8 1012.7 1006.9 998.9 996.9 997.6 1003.6 1011.8 1015.2 1020.3 1010.1 MAX. QFF PRESSURE IN HPA 1035.8 1040.4 1026.1 1024.0 1013.8 1004.1 1001.0 1001.8 1013.5 1017.5 1021.8 1034.4 1040.4 DAY 31 7 31 2 13 4 9 19 24 27 26 19 MIN. QFF PRESSURE IN HPA 1006.6 1004.2 1000.4 1004.5 1001.2 993.9 991.9 991.8 997.9 1005.5 1006.9 1007.0 991.8 DAY 3 23 28 30 31 10 15 2 6 30 16 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 767.4 769.2 767.7 772.4 772.6 770.6 771.1 771.1 772.5 775.5 773.6 770.5 771.2 MAX. QFE PRESSURE IN HPA 771.6 773.9 772.8 776.6 774.3 774.0 774.0 774.2 778.0 779.3 777.8 774.6 779.3 DAY 22 8 8 9 24 4 20 26 24 27 29 19 MIN. QFE PRESSURE IN HPA 762.2 761.9 759.6 768.6 770.2 767.6 767.6 765.9 769.1 772.0 770.2 765.8 759.6 DAY 17 14 30 23 11 11 5 2 13 2 15 5 MEAN QNH PRESSURE IN HPA 1013.2 1015.5 1013.6 1019.5 1019.7 1017.2 1017.8 1017.8 1019.6 1023.4 1021.0 1017.0 1017.9 MAX. QNH PRESSURE IN HPA 1018.5 1021.3 1020.0 1024.7 1021.9 1021.5 1021.5 1021.7 1026.5 1028.1 1026.2 1022.2 1028.1 DAY 22 8 8 9 24 4 20 26 24 27 29 19 MIN. QNH PRESSURE IN HPA 1006.7 1006.3 1003.4 1014.7 1016.7 1013.5 1013.5 1011.3 1015.3 1019.0 1016.7 1011.2 1003.4 DAY 17 14 30 23 11 11 5 2 13 2 15 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.8 997.1 995.3 995.7 1001.9 1010.5 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.6 1002.2 999.7 1000.0 1012.6 1018.0 ****** ****** ****** DAY ** ** ** ** 8 4 8 8 23 27 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 997.8 992.0 989.9 989.8 996.2 1004.8 ****** ****** ****** DAY ** ** ** ** 31 30 5 2 6 1 ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 766.8 769.0 767.4 772.1 772.2 770.1 770.3 770.1 771.4 774.2 772.8 769.6 770.5 MAX. QFE PRESSURE IN HPA 770.7 773.3 772.3 776.1 774.2 773.0 773.2 773.2 776.4 777.5 776.7 773.7 777.5 DAY 22 8 7 9 13 4 20 26 24 27 28 18 MIN. QFE PRESSURE IN HPA 762.5 762.5 759.5 768.4 769.8 767.3 766.9 765.4 767.9 770.8 769.8 764.8 759.5 DAY 17 14 29 23 11 7 5 2 12 1 15 5 MEAN QNH PRESSURE IN HPA 1012.5 1015.2 1013.2 1019.1 1019.2 1016.6 1016.9 1016.6 1018.3 1021.7 1020.0 1015.9 1017.1 MAX. QNH PRESSURE IN HPA 1017.3 1020.6 1019.3 1024.1 1021.7 1020.2 1020.5 1020.5 1024.5 1025.9 1024.9 1021.1 1025.9 DAY 22 8 7 9 13 4 20 26 24 27 28 18 MIN. QNH PRESSURE IN HPA 1007.1 1007.1 1003.3 1014.5 1016.2 1013.1 1012.6 1010.7 1013.8 1017.5 1016.2 1009.9 1003.3 DAY 17 14 29 23 11 7 5 2 12 1 15 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.7 996.3 994.2 993.7 999.5 1007.8 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1013.1 1001.7 997.7 998.3 1010.2 1013.9 ****** ****** ****** DAY ** ** ** ** 8 3 28 8 23 24 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 997.0 991.4 989.3 988.1 993.5 1001.5 ****** ****** ****** DAY ** ** ** ** 31 30 16 1 12 1 ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 765.9 768.0 766.5 771.2 771.4 769.6 769.4 769.2 770.6 773.1 772.1 768.9 769.7 MAX. QFE PRESSURE IN HPA 769.6 772.3 771.7 775.0 773.7 772.3 772.0 772.1 774.4 776.0 775.9 772.8 776.0 DAY 19 20 7 9 12 3 9 26 23 27 28 18 MIN. QFE PRESSURE IN HPA 761.5 761.4 759.1 767.6 769.0 767.1 766.4 764.5 767.7 770.4 769.1 763.0 759.1 DAY 2 22 29 29 16 7 31 1 12 1 16 4 MEAN QNH PRESSURE IN HPA 1011.3 1014.0 1012.1 1017.9 1018.2 1016.0 1015.8 1015.4 1017.3 1020.4 1019.1 1015.0 1016.0 MAX. QNH PRESSURE IN HPA 1016.0 1019.3 1018.6 1022.7 1021.1 1019.3 1019.0 1019.1 1022.0 1024.0 1023.9 1020.0 1024.0 DAY 19 20 7 9 12 3 9 26 23 27 28 18 MIN. QNH PRESSURE IN HPA 1005.8 1005.7 1002.8 1013.5 1015.2 1012.8 1012.0 1009.6 1013.6 1017.0 1015.3 1007.7 1002.8 DAY 2 22 29 29 16 7 31 1 12 1 16 4 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.7 997.0 993.9 993.7 999.7 1007.4 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1010.5 1002.3 998.0 997.5 1007.4 1013.1 ****** ****** ****** DAY ** ** ** ** 13 3 8 8 23 25 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 999.4 992.0 990.3 987.7 994.7 1001.4 ****** ****** ****** DAY ** ** ** ** 31 30 5 1 5 10 ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 766.2 768.4 766.6 771.2 771.4 769.6 769.2 769.0 770.7 773.5 772.5 769.3 769.8 MAX. QFE PRESSURE IN HPA 770.4 772.8 771.7 774.7 774.0 772.0 772.1 771.9 774.6 776.8 776.4 774.1 776.8 DAY 18 8 7 9 12 25 8 26 23 27 28 18 MIN. QFE PRESSURE IN HPA 760.4 760.1 757.0 767.8 769.0 767.0 766.0 764.4 768.0 770.9 769.5 763.5 757.0 DAY 11 22 15 29 16 7 31 1 12 1 15 4 MEAN QNH PRESSURE IN HPA 1011.7 1014.4 1012.2 1018.0 1018.2 1015.9 1015.5 1015.3 1017.4 1020.9 1019.6 1015.6 1016.2 MAX. QNH PRESSURE IN HPA 1017.0 1020.0 1018.6 1022.4 1021.5 1019.0 1019.1 1018.8 1022.2 1025.0 1024.5 1021.6 1025.0 DAY 18 8 7 9 12 25 8 26 23 27 28 18 MIN. QNH PRESSURE IN HPA 1004.4 1004.1 1000.2 1013.7 1015.2 1012.7 1011.5 1009.4 1014.0 1017.6 1015.8 1008.3 1000.2 DAY 11 22 15 29 16 7 31 1 12 1 15 4 MEAN QFF PRESSURE IN HPA 1021.8 1023.3 1012.3 1012.0 1006.1 998.2 995.1 995.7 1002.2 1010.5 1015.1 1020.0 1009.4 MAX. QFF PRESSURE IN HPA 1032.0 1039.8 1025.6 1021.9 1012.3 1002.3 999.9 999.4 1009.0 1015.7 1020.2 1034.4 1039.8 DAY 15 7 31 2 12 2 8 8 23 24 27 18 MIN. QFF PRESSURE IN HPA 1004.6 1000.6 996.8 1004.6 1001.2 994.0 991.0 990.4 997.3 1006.3 1008.2 1004.8 990.4 DAY 2 22 15 29 30 30 16 1 5 10 16 4 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 772.2 770.3 770.1 770.1 771.7 774.3 ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 773.8 772.7 773.0 773.0 776.8 777.7 ****** ****** ****** DAY ** ** ** ** 12 3 8 26 23 26 ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 769.8 766.9 766.4 764.8 768.6 770.9 ****** ****** ****** DAY ** ** ** ** 16 10 31 1 11 1 ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1019.2 1016.8 1016.6 1016.5 1018.5 1021.8 ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1021.2 1019.8 1020.2 1020.2 1025.0 1026.1 ****** ****** ****** DAY ** ** ** ** 12 3 8 26 23 26 ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1016.2 1012.6 1012.0 1009.9 1014.7 1017.6 ****** ****** ****** DAY ** ** ** ** 16 10 31 1 11 1 ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1005.3 996.8 994.3 994.5 1001.1 1009.2 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.0 1001.7 999.3 998.4 1011.9 1016.6 ****** ****** ****** DAY ** ** ** ** 8 2 8 8 23 26 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 997.8 991.3 990.4 988.1 995.4 1003.8 ****** ****** ****** DAY ** ** ** ** 31 30 31 1 11 1 ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** 771.8 770.0 770.2 770.1 771.5 774.2 ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** 773.8 773.6 773.0 772.9 776.7 777.9 ****** ****** ****** DAY ** ** ** ** 24 3 19 26 23 26 ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** 768.7 766.7 766.2 764.4 768.1 770.6 ****** ****** ****** DAY ** ** ** ** 31 10 31 1 12 1 ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** 1018.8 1016.5 1016.8 1016.5 1018.3 1021.7 ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** 1021.2 1021.0 1020.2 1020.1 1024.9 1026.4 ****** ****** ****** DAY ** ** ** ** 24 3 19 26 23 26 ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** 1014.8 1012.3 1011.7 1009.4 1014.1 1017.2 ****** ****** ****** DAY ** ** ** ** 31 10 31 1 12 1 ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** 1004.0 996.0 994.1 993.6 999.6 1008.0 ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** 1012.3 1001.7 998.5 997.7 1010.2 1014.2 ****** ****** ****** DAY ** ** ** ** 8 3 8 8 23 26 ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** 995.5 989.5 988.7 987.7 993.2 1001.9 ****** ****** ****** DAY ** ** ** ** 31 30 5 1 5 1 ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -5.6 -2.8 1.8 9.0 17.7 22.9 24.1 24.6 21.3 13.5 8.7 2.4 11.5 MINIMUN AIR TEMPERATURE (C) -12.3 -9.0 -3.9 2.6 8.1 11.3 14.8 14.6 10.0 4.7 -0.1 -4.5 3.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 29 20 15 2 0 0 0 0 0 0 2 15 83 DAYS WITH FREEZING MIN.<= 0 31 28 24 9 0 0 0 0 0 1 16 26 135 TEMPERATURE RECORDS LOWEST(C) -26.8 -22.6 -12.6 -5.0 3.0 7.0 10.2 12.2 7.4 -2.6 -4.6 -24.6 -26.8 DAY 26 13 21 6 15 18 5 24 3 31 14 28 MAXIMUM AIR TEMPERATURE (C) -0.3 2.4 6.5 12.8 22.2 28.0 29.8 31.1 27.7 19.0 14.9 7.3 16.8 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 7 18 29 1 0 0 0 55 DAYS WITH MAXIMUM TEMP. <= 0 15 6 0 0 0 0 0 0 0 0 0 4 25 TEMPERATURE RECORDS HIGHEST(C) 5.0 8.4 10.0 20.2 27.2 31.6 31.4 33.8 30.2 24.0 20.0 16.4 33.8 DAY 6 18 6 26 24 30 24 13 4 7 5 1 DIF. BETWEEN (MAX.-MIN.) (C) 12.0 11.4 10.4 10.2 14.1 16.7 15.0 16.5 17.7 14.3 15.0 11.8 13.8 MEAN DAILY TEMP. (MDT) (C) -6.3 -3.3 1.3 7.7 15.1 19.7 22.3 22.9 18.9 11.8 7.4 1.4 9.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 7.8 48.3 58.0 0.3 0.0 0.0 0.0 114.5 HEATING DEG. DAYS(BASE 18 0C) 753.5 596.9 518.7 308.6 90.0 4.5 0.0 0.0 5.4 191.2 317.7 513.9 3300.4 DEWPOINT (MEAN C) -10.3 -8.2 -5.6 -4.1 -1.2 -2.4 2.7 2.3 -2.8 -3.3 -5.2 -9.5 -4.0 MIXING RATIO (G/KG) 2.46 2.91 3.41 3.85 4.66 4.32 6.34 6.01 4.15 4.03 3.46 2.58 4.01 VAPOUR PRESSURE (HPA) 3.02 3.56 4.19 4.73 5.72 5.31 7.74 7.37 5.11 4.98 4.27 3.18 4.93 SATURATION DEF. (HPA) 1.32 1.76 3.02 7.41 15.39 23.86 23.37 24.76 21.75 11.35 7.65 4.94 12.21 RELATIVE HUMIDITY (MEAN %) 71 69 61 43 31 21 27 25 22 36 42 47 41 RELATIVE HUMIDITY (MAX. %) 82 81 76 59 50 40 49 42 40 56 68 65 59 RELATIVE HUMIDITY (MIN. %) 59 56 47 31 21 12 18 16 13 22 24 33 29 RELATIVE HUMIDITY (MEAN% 03UTC) 75 75 70 57 49 40 47 42 40 54 68 59 56 RELATIVE HUMIDITY (MEAN% 09UTC) 67 64 56 37 24 14 21 17 15 27 30 39 34 RELATIVE HUMIDITY (MEAN% 15UTC) 71 67 59 40 26 15 21 19 16 31 34 46 37 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 164.5 215.4 263.8 89.1 8.2 0.0 0.4 0.0 0.0 34.6 20.1 119.6 915.7 DAYS WITH PRECIPITATION >=10 5 7 5 3 0 0 0 0 0 2 1 2 25 DAYS WITH PRECIPITATION >= 5 11 7 7 4 1 0 0 0 0 2 1 5 38 DAYS WITH PRECIPITATION >= 1 15 11 13 4 3 0 0 0 0 4 2 8 60 DAYS WITH PRECIPITATION 16 12 14 7 3 0 1 0 0 4 3 9 69 GREATEST DAILY PRECIPITATION 47.0 56.0 96.0 39.0 6.0 0.0 0.4 0.0 0.0 19.0 18.0 71.0 96.0 DAY 5 5 14 3 12 ** 10 ** ** 29 13 25 DAY WITH THUNDER STORM 3 2 1 2 1 0 1 1 0 1 0 1 13 DAYS WITH SNOW OR SLEET 14 11 9 2 0 0 0 0 0 0 0 9 45 DAYS WITH DUST 1 3 2 1 3 0 0 0 0 0 0 0 10 WIND DIRECTION (PREVAILING) 225 225 270 270 315 270 270 270 270 270 270 315 270 PREVAILING WIND SPEED(KNOTS) 9.5 9.5 8.0 8.8 7.9 7.5 9.2 7.9 8.4 8.4 8.4 9.2 8.4 PREVAILING WIND PERCENT 13.5 13.6 16.8 22.7 21.3 23.3 12.0 16.4 20.0 26.5 16.7 18.7 17.0 CALMS PERCENT OF WIND 70.3 65.0 60.0 44.7 38.1 50.0 58.7 58.2 53.3 48.4 64.0 51.6 55.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 184 189 150 155 150 155 1888 VECTOR WIND DIRECTION (MEAN) 245 223 249 263 295 265 211 251 249 273 259 282 260 VECTOR WIND MAGNITUDE(KNOTS) 2.0 2.3 1.9 3.5 2.5 2.8 0.7 1.9 2.5 3.0 1.8 3.2 2.2 WIND STEADINESES (MEAN %) 74.1 67.6 63.3 74.5 56.8 70.0 21.2 59.4 65.8 69.8 62.1 74.4 59.5 WIND SPEED (MEAN KNOTS) 2.7 3.4 3.0 4.7 4.4 4.0 3.3 3.2 3.8 4.3 2.9 4.3 3.7 FASTEST WIND DIRECTION 250 220 270 300 190 270 290 310 280 250 300 310 220 FASTEST WIND SPEED (KNOTS) 29 39 29 23 29 16 16 23 27 19 19 17 39 DAY 8 19 12 13 5 6 3 14 2 14 13 15 DAYS WITH SKY CLEAR (0-2)/8 14 15 17 17 26 30 20 27 30 24 25 21 266 DAYS WITH P.CLOUDY (3-6)/8 10 6 6 8 4 0 11 4 0 4 3 6 62 DAYS WITH CLOUDY (7-8)/8 7 7 8 5 1 0 0 0 0 3 2 4 37 DAYS WITH VISIBILITY =< 2 KM 4 3 2 3 0 0 0 0 0 0 0 0 12 DURATION OF SUNSHINE HOURS 129.9 154.7 198.3 229.6 350.7 373.0 316.5 ****** 333.0 ****** 333.0 ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 767.7 765.7 770.1 769.0 770.8 769.8 768.4 769.6 771.3 773.7 773.4 770.3 770.0 MAX. QFE PRESSURE IN HPA 775.1 772.9 777.8 774.6 776.0 775.6 773.5 774.0 775.5 778.2 779.7 777.9 779.7 DAY-HOUR 20- 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 762.3 756.5 764.4 763.8 762.8 765.2 763.0 766.6 767.4 768.6 767.5 760.0 756.5 DAY-HOUR 23- 3 15-15 19-12 1-15 12-15 27- 3 5- 9 8-12 4-15 14-12 1-12 25-12 MEAN QNH PRESSURE IN HPA 1013.5 1011.1 1016.7 1015.2 1017.5 1016.2 1014.4 1016.0 1018.1 1021.0 1020.8 1016.8 1016.4 MAX. QNH PRESSURE IN HPA 1022.8 1020.1 1026.2 1022.2 1024.0 1023.5 1020.8 1021.5 1023.4 1026.7 1028.6 1026.4 1028.6 DAY-HOUR 20- 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 1006.8 999.5 1009.4 1008.7 1007.4 1010.5 1007.7 1012.2 1013.2 1014.7 1013.3 1003.9 999.5 DAY-HOUR 23- 3 15-15 19-12 1-15 12-15 27- 3 5- 9 8-12 4-15 14-12 1-12 25-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 994.1 ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.7 ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 24- 3 **-** **-** **-** **-** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 989.4 ****** ****** ****** ****** ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 7-21 **-** **-** **-** **-** 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 767.3 765.5 769.9 768.8 771.0 770.1 768.9 770.1 771.8 773.7 773.6 770.2 770.1 MAX. QFE PRESSURE IN HPA 774.0 771.5 776.4 774.1 775.4 775.5 773.0 773.2 774.6 777.2 779.4 776.5 779.4 DAY 20 8 10 25 18 5 17 5 16 19 23 5 MIN. QFE PRESSURE IN HPA 762.3 758.3 765.0 763.9 763.4 765.2 763.5 767.1 769.0 768.7 768.9 761.0 758.3 DAY 23 10 19 10 13 27 5 9 4 14 1 25 MEAN QNH PRESSURE IN HPA 1013.1 1010.8 1016.3 1015.0 1017.7 1016.6 1015.1 1016.6 1018.7 1021.1 1021.0 1016.7 1016.6 MAX. QNH PRESSURE IN HPA 1021.5 1018.3 1024.5 1021.6 1023.2 1023.4 1020.2 1020.5 1022.2 1025.5 1028.2 1024.6 1028.2 DAY 20 8 10 25 18 5 17 5 16 19 23 5 MIN. QNH PRESSURE IN HPA 1006.8 1001.8 1010.2 1008.8 1008.2 1010.5 1008.3 1012.8 1015.2 1014.8 1015.1 1005.2 1001.8 DAY 23 10 19 10 13 27 5 9 4 14 1 25 MEAN QFF PRESSURE IN HPA 1020.5 1015.3 1016.4 1008.1 1003.4 998.3 994.7 996.2 1002.5 1011.2 1015.8 1016.7 1008.3 MAX. QFF PRESSURE IN HPA 1039.9 1031.2 1027.3 1013.7 1009.5 1006.4 999.2 999.7 1007.3 1017.7 1025.4 1040.9 1040.9 DAY 26 13 10 25 15 1 15 24 26 19 23 29 MIN. QFF PRESSURE IN HPA 1006.9 1000.4 1007.3 998.6 994.8 989.9 989.5 992.4 997.1 1001.1 1006.8 1004.8 989.5 DAY 23 10 24 16 12 27 4 27 2 14 1 25 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 768.6 766.5 771.0 769.6 771.5 770.4 769.2 770.6 772.5 774.6 774.7 771.3 770.9 MAX. QFE PRESSURE IN HPA 775.1 772.9 777.8 774.6 776.0 775.6 773.5 774.0 775.5 778.2 779.7 777.9 779.7 DAY 20 8 10 25 18 5 16 4 26 19 23 5 MIN. QFE PRESSURE IN HPA 764.3 757.6 765.3 764.7 764.0 765.4 763.5 767.6 769.4 768.9 769.6 761.4 757.6 DAY 18 10 19 16 13 27 5 9 4 14 1 25 MEAN QNH PRESSURE IN HPA 1014.7 1012.1 1017.8 1016.0 1018.3 1017.0 1015.5 1017.2 1019.6 1022.2 1022.3 1018.0 1017.6 MAX. QNH PRESSURE IN HPA 1022.8 1020.1 1026.2 1022.2 1024.0 1023.5 1020.8 1021.5 1023.4 1026.7 1028.6 1026.4 1028.6 DAY 20 8 10 25 18 5 16 4 26 19 23 5 MIN. QNH PRESSURE IN HPA 1009.3 1000.9 1010.6 1009.8 1008.9 1010.7 1008.3 1013.5 1015.7 1015.1 1016.0 1005.7 1000.9 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 767.9 766.0 770.6 769.3 771.1 769.9 768.4 769.7 771.4 773.7 773.5 770.4 770.2 MAX. QFE PRESSURE IN HPA 774.5 772.4 777.2 774.0 775.5 775.4 772.6 773.2 774.6 777.0 778.6 776.5 778.6 DAY 26 8 10 26 18 4 16 4 26 19 23 6 MIN. QFE PRESSURE IN HPA 763.5 759.3 764.8 764.3 764.5 765.8 763.0 767.4 768.3 769.1 768.6 760.5 759.3 DAY 17 10 19 6 13 27 5 8 4 14 1 25 MEAN QNH PRESSURE IN HPA 1013.9 1011.5 1017.3 1015.6 1017.8 1016.3 1014.4 1016.0 1018.2 1021.1 1020.9 1017.0 1016.7 MAX. QNH PRESSURE IN HPA 1022.1 1019.5 1025.5 1021.5 1023.4 1023.2 1019.7 1020.5 1022.2 1025.2 1027.2 1024.6 1027.2 DAY 26 8 10 26 18 4 16 4 26 19 23 6 MIN. QNH PRESSURE IN HPA 1008.3 1003.1 1009.9 1009.3 1009.6 1011.2 1007.7 1013.2 1014.3 1015.3 1014.7 1004.6 1003.1 DAY 17 10 19 6 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 ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 767.1 765.1 769.6 768.7 770.3 769.2 767.6 768.8 770.4 773.0 772.5 769.5 769.3 MAX. QFE PRESSURE IN HPA 773.3 770.8 775.7 773.2 774.3 774.8 772.0 772.6 773.4 776.5 776.9 776.1 776.9 DAY 26 8 9 27 18 4 15 4 27 15 23 5 MIN. QFE PRESSURE IN HPA 762.3 757.2 764.4 764.0 764.1 765.7 763.0 766.6 767.5 768.6 767.5 760.0 757.2 DAY 28 15 19 2 12 27 5 8 4 14 1 25 MEAN QNH PRESSURE IN HPA 1012.8 1010.3 1015.9 1014.8 1016.9 1015.5 1013.5 1015.0 1017.0 1020.3 1019.5 1015.8 1015.6 MAX. QNH PRESSURE IN HPA 1020.6 1017.5 1023.6 1020.5 1021.9 1022.5 1019.0 1019.7 1020.7 1024.6 1025.1 1024.1 1025.1 DAY 26 8 9 27 18 4 15 4 27 15 23 5 MIN. QNH PRESSURE IN HPA 1006.8 1000.4 1009.4 1008.9 1009.1 1011.1 1007.7 1012.2 1013.3 1014.7 1013.3 1003.9 1000.4 DAY 28 15 19 2 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 ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 767.5 765.4 769.6 768.6 770.3 769.2 767.5 768.9 770.4 773.3 773.0 770.1 769.5 MAX. QFE PRESSURE IN HPA 773.9 770.6 776.0 772.9 774.3 774.5 771.2 772.8 773.4 776.7 777.2 776.5 777.2 DAY 26 7 9 27 18 4 15 4 22 15 22 5 MIN. QFE PRESSURE IN HPA 762.7 756.5 765.0 763.8 762.8 765.8 763.3 766.7 767.4 769.3 768.0 761.2 756.5 DAY 17 15 19 1 12 26 5 1 4 14 1 25 MEAN QNH PRESSURE IN HPA 1013.3 1010.7 1016.0 1014.8 1016.8 1015.4 1013.4 1015.0 1017.0 1020.6 1020.3 1016.6 1015.8 MAX. QNH PRESSURE IN HPA 1021.3 1017.2 1024.0 1020.1 1021.9 1022.1 1018.0 1020.0 1020.7 1024.9 1025.5 1024.6 1025.5 DAY 26 7 9 27 18 4 15 4 22 15 22 5 MIN. QNH PRESSURE IN HPA 1007.3 999.5 1010.2 1008.7 1007.4 1011.2 1008.1 1012.3 1013.2 1015.6 1014.0 1005.4 999.5 DAY 17 15 19 1 12 26 5 1 4 14 1 25 MEAN QFF PRESSURE IN HPA 1020.7 1015.0 1015.8 1007.7 1002.6 997.2 993.1 994.6 1000.8 1010.8 1015.1 1016.7 1007.5 MAX. QFF PRESSURE IN HPA 1041.1 1030.5 1026.2 1013.0 1008.4 1004.2 997.1 999.2 1005.5 1015.8 1023.3 1043.2 1043.2 DAY 26 13 21 11 15 4 8 4 26 19 14 28 MIN. QFF PRESSURE IN HPA 1008.1 998.8 1005.8 999.9 994.1 991.6 987.5 991.1 996.0 1002.7 1005.3 1005.4 987.5 DAY 1 15 24 29 12 26 12 13 4 14 1 9 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 KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -3.4 -2.8 2.0 10.8 15.6 21.6 25.6 25.0 20.5 12.0 7.3 -1.9 11.0 MINIMUN AIR TEMPERATURE (C) -9.0 -8.9 -3.1 3.6 6.6 11.1 14.0 13.6 9.8 4.6 -0.3 -7.5 2.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 21 21 10 0 0 0 0 0 0 0 3 14 69 DAYS WITH FREEZING MIN.<= 0 27 25 22 1 0 0 0 0 0 0 18 24 117 TEMPERATURE RECORDS LOWEST(C) -22.0 -18.0 -13.6 -1.0 0.4 5.4 11.0 11.4 5.6 1.0 -6.4 -22.2 -22.2 DAY 16 10 16 14 5 1 16 29 28 30 27 29 MAXIMUM AIR TEMPERATURE (C) 1.6 2.5 6.2 15.1 20.2 27.0 31.8 31.5 26.7 17.2 12.8 3.2 16.3 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 3 28 27 9 0 0 0 67 DAYS WITH MAXIMUM TEMP. <= 0 13 4 1 0 0 0 0 0 0 0 0 6 24 TEMPERATURE RECORDS HIGHEST(C) 7.2 6.6 10.4 21.4 23.6 30.4 35.8 34.4 31.2 22.5 17.6 10.0 35.8 DAY 20 25 22 27 16 30 11 9 10 13 3 9 DIF. BETWEEN (MAX.-MIN.) (C) 10.6 11.4 9.3 11.5 13.6 15.9 17.8 17.9 16.9 12.6 13.1 10.7 13.4 MEAN DAILY TEMP. (MDT) (C) -3.7 -3.2 1.5 9.4 13.4 19.0 22.9 22.6 18.3 10.9 6.3 -2.1 9.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.6 59.5 49.0 0.6 0.0 0.0 0.0 110.7 HEATING DEG. DAYS(BASE 18 0C) 672.8 593.3 510.7 250.3 143.7 9.4 0.0 0.0 27.7 220.8 352.1 624.1 3405.1 DEWPOINT (MEAN C) -9.7 -10.1 -5.0 -2.7 -4.4 0.2 1.9 1.0 -1.7 0.8 -4.5 -8.2 -3.5 MIXING RATIO (G/KG) 2.64 2.56 3.67 4.23 3.83 5.29 5.91 5.47 4.52 5.39 3.65 3.01 4.18 VAPOUR PRESSURE (HPA) 3.25 3.15 4.49 5.20 4.70 6.49 7.23 6.70 5.57 6.64 4.50 3.70 5.14 SATURATION DEF. (HPA) 1.86 2.13 2.86 8.39 13.67 20.45 27.24 26.71 20.16 8.07 6.22 2.08 11.65 RELATIVE HUMIDITY (MEAN %) 65 61 63 43 29 27 25 23 26 51 47 66 44 RELATIVE HUMIDITY (MAX. %) 80 78 80 64 52 48 46 42 45 76 71 84 64 RELATIVE HUMIDITY (MIN. %) 50 43 47 28 16 16 13 13 15 35 31 47 30 RELATIVE HUMIDITY (MEAN% 03UTC) 70 70 74 60 49 48 46 42 45 74 68 72 60 RELATIVE HUMIDITY (MEAN% 09UTC) 59 53 60 35 18 19 16 16 18 40 35 63 36 RELATIVE HUMIDITY (MEAN% 15UTC) 66 60 59 38 24 21 18 17 22 46 43 61 40 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 229.6 230.3 406.2 140.4 2.9 1.3 0.0 0.0 0.0 79.0 22.0 581.0 1692.7 DAYS WITH PRECIPITATION >=10 9 6 8 4 0 0 0 0 0 2 1 14 44 DAYS WITH PRECIPITATION >= 5 10 8 11 5 0 0 0 0 0 6 2 16 58 DAYS WITH PRECIPITATION >= 1 16 10 13 9 1 1 0 0 0 8 2 18 78 DAYS WITH PRECIPITATION 16 11 15 9 3 3 0 0 2 8 3 18 88 GREATEST DAILY PRECIPITATION 56.0 67.0 137.0 52.0 2.0 1.0 0.0 0.0 0.0 29.0 13.0 104.0 137.0 DAY 21 27 6 4 17 24 ** ** ** 16 16 12 DAY WITH THUNDER STORM 1 2 8 1 0 1 0 0 1 4 1 9 28 DAYS WITH SNOW OR SLEET 16 9 9 1 0 0 0 0 0 0 3 14 52 DAYS WITH DUST 0 0 1 0 4 2 0 3 3 0 0 3 16 WIND DIRECTION (PREVAILING) 270 225 270 270 315 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 10.1 9.7 10.3 9.1 11.1 8.8 8.6 8.2 5.8 3.9 5.0 8.6 8.0 PREVAILING WIND PERCENT 14.2 12.9 21.9 27.3 22.6 19.3 16.1 14.8 16.7 18.1 18.7 17.4 18.1 CALMS PERCENT OF WIND 69.0 67.9 51.0 44.0 34.2 48.0 57.4 58.1 52.0 65.2 53.3 49.0 54.0 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 247 246 256 260 284 276 266 233 258 280 269 243 261 VECTOR WIND MAGNITUDE(KNOTS) 2.1 2.2 2.9 3.8 4.6 1.9 1.5 1.5 1.7 1.1 1.5 2.9 2.2 WIND STEADINESES (MEAN %) 75.0 75.9 61.7 74.5 71.9 46.3 38.5 46.9 56.7 73.3 60.0 67.4 59.5 WIND SPEED (MEAN KNOTS) 2.8 2.9 4.7 5.1 6.4 4.1 3.9 3.2 3.0 1.5 2.5 4.3 3.7 FASTEST WIND DIRECTION 240 190 340 220 330 330 240 240 300 320 120 270 270 FASTEST WIND SPEED (KNOTS) 19 27 33 19 27 17 23 16 19 16 17 58 58 DAY 23 4 10 4 18 1 14 7 25 22 5 9 DAYS WITH SKY CLEAR (0-2)/8 14 8 8 12 23 25 31 31 28 18 22 12 232 DAYS WITH P.CLOUDY (3-6)/8 7 11 14 11 8 5 0 0 2 7 5 6 76 DAYS WITH CLOUDY (7-8)/8 10 9 9 7 0 0 0 0 0 6 3 13 57 DAYS WITH VISIBILITY =< 2 KM 1 1 2 0 0 0 0 0 0 0 1 10 15 DURATION OF SUNSHINE HOURS 55.8 129.4 153.5 231.0 319.8 319.4 360.1 341.7 284.5 212.1 198.1 90.7 2696.1 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 768.1 767.8 767.4 770.8 769.0 769.4 767.7 769.0 772.7 774.1 773.0 768.3 769.8 MAX. QFE PRESSURE IN HPA 775.0 776.7 774.5 775.5 773.4 774.7 771.7 773.6 775.8 778.1 776.5 774.3 778.1 DAY-HOUR 12- 6 15- 9 29- 6 18- 6 9- 6 23- 3 1- 6 23- 6 17- 6 20- 6 2- 6 8- 6 MIN. QFE PRESSURE IN HPA 759.7 760.9 756.2 765.6 763.9 764.7 763.8 765.0 767.9 770.8 768.8 759.0 756.2 DAY-HOUR 26- 3 8- 3 6-12 4-12 23- 3 12- 3 14- 9 12-15 3-12 4-15 8-12 31-15 MEAN QNH PRESSURE IN HPA 1014.1 1013.8 1013.2 1017.4 1015.2 1015.7 1013.6 1015.2 1019.9 1021.6 1020.2 1014.4 1016.2 MAX. QNH PRESSURE IN HPA 1022.7 1024.9 1022.1 1023.4 1020.7 1022.4 1018.6 1021.0 1023.7 1026.6 1024.6 1021.9 1026.6 DAY-HOUR 12- 6 15- 9 29- 6 18- 6 9- 6 23- 3 1- 6 23- 6 17- 6 20- 6 2- 6 8- 6 MIN. QNH PRESSURE IN HPA 1003.6 1005.1 999.2 1011.0 1008.8 1009.8 1008.7 1010.2 1013.8 1017.5 1015.0 1002.7 999.2 DAY-HOUR 26- 3 8- 3 6-12 4-12 23- 3 12- 3 14- 9 12-15 3-12 4-15 8-12 31-15 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 768.0 767.6 767.1 770.7 768.9 769.9 768.4 769.7 773.3 774.2 773.3 768.4 769.9 MAX. QFE PRESSURE IN HPA 773.7 775.2 772.4 774.4 772.7 774.7 771.4 773.1 775.1 777.4 775.6 773.2 777.4 DAY 13 16 29 20 9 23 1 23 17 28 2 8 MIN. QFE PRESSURE IN HPA 759.7 760.9 759.6 765.6 763.9 764.7 764.2 766.2 770.1 770.9 769.8 759.7 759.6 DAY 26 8 7 10 23 12 14 11 4 15 6 22 MEAN QNH PRESSURE IN HPA 1013.9 1013.5 1012.8 1017.3 1015.1 1016.3 1014.4 1016.1 1020.6 1021.8 1020.6 1014.4 1016.4 MAX. QNH PRESSURE IN HPA 1021.1 1023.0 1019.5 1022.0 1019.8 1022.4 1018.2 1020.3 1022.8 1025.7 1023.5 1020.5 1025.7 DAY 13 16 29 20 9 23 1 23 17 28 2 8 MIN. QNH PRESSURE IN HPA 1003.6 1005.1 1003.4 1011.0 1008.8 1009.8 1009.2 1011.7 1016.6 1017.6 1016.2 1003.6 1003.4 DAY 26 8 7 10 23 12 14 11 4 15 6 22 MEAN QFF PRESSURE IN HPA 1018.8 1018.1 1011.9 1009.1 1002.9 999.0 993.6 996.0 1004.7 1012.7 1016.3 1017.3 1008.4 MAX. QFF PRESSURE IN HPA 1033.9 1033.6 1019.6 1014.5 1009.5 1007.0 997.3 1000.6 1012.4 1017.2 1023.1 1034.3 1034.3 DAY 13 15 17 14 25 1 1 31 30 28 27 24 MIN. QFF PRESSURE IN HPA 1007.1 1006.4 1003.4 1001.5 996.0 990.9 988.8 989.5 998.3 1005.2 1006.8 1002.5 988.8 DAY 25 8 6 10 17 12 14 11 4 15 5 22 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 769.0 768.6 768.1 771.5 769.3 770.1 768.7 770.2 773.8 775.1 774.2 769.4 770.7 MAX. QFE PRESSURE IN HPA 775.0 776.3 774.5 775.5 773.4 774.7 771.7 773.6 775.8 778.1 776.5 774.3 778.1 DAY 12 15 29 18 9 23 1 23 17 20 2 8 MIN. QFE PRESSURE IN HPA 761.0 761.8 758.3 766.6 764.9 764.7 763.9 766.3 770.2 771.2 770.2 761.7 758.3 DAY 26 8 6 5 23 12 14 11 8 15 6 22 MEAN QNH PRESSURE IN HPA 1015.2 1014.7 1014.0 1018.3 1015.6 1016.6 1014.8 1016.7 1021.3 1022.8 1021.7 1015.7 1017.3 MAX. QNH PRESSURE IN HPA 1022.7 1024.4 1022.1 1023.4 1020.7 1022.4 1018.6 1021.0 1023.7 1026.6 1024.6 1021.9 1026.6 DAY 12 15 29 18 9 23 1 23 17 20 2 8 MIN. QNH PRESSURE IN HPA 1005.2 1006.2 1001.8 1012.2 1010.1 1009.8 1008.8 1011.8 1016.7 1018.0 1016.7 1006.1 1001.8 DAY 26 8 6 5 23 12 14 11 8 15 6 22 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 768.4 768.3 767.9 771.1 769.1 769.5 767.8 769.2 772.8 774.2 773.0 768.6 770.0 MAX. QFE PRESSURE IN HPA 773.6 776.7 773.6 775.4 772.8 773.7 770.2 772.3 774.4 777.1 775.3 774.1 777.1 DAY 12 15 29 19 9 22 1 23 17 27 1 8 MIN. QFE PRESSURE IN HPA 761.1 762.1 758.3 766.0 765.5 765.2 763.8 765.9 769.0 771.3 769.4 762.5 758.3 DAY 25 8 6 4 23 12 14 11 3 4 6 22 MEAN QNH PRESSURE IN HPA 1014.4 1014.3 1013.8 1017.9 1015.4 1015.8 1013.7 1015.4 1020.0 1021.7 1020.3 1014.7 1016.4 MAX. QNH PRESSURE IN HPA 1021.0 1024.9 1021.0 1023.2 1020.0 1021.1 1016.7 1019.3 1022.0 1025.4 1023.1 1021.6 1025.4 DAY 12 15 29 19 9 22 1 23 17 27 1 8 MIN. QNH PRESSURE IN HPA 1005.3 1006.6 1001.8 1011.5 1010.8 1010.5 1008.7 1011.3 1015.2 1018.1 1015.7 1007.1 1001.8 DAY 25 8 6 4 23 12 14 11 3 4 6 22 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 767.4 767.3 766.9 770.3 768.8 768.8 766.9 768.1 771.8 773.4 772.1 767.5 769.1 MAX. QFE PRESSURE IN HPA 773.1 776.0 772.3 774.5 772.0 773.3 769.8 771.0 774.2 776.2 774.6 773.7 776.2 DAY 12 15 18 19 9 22 1 31 29 20 2 8 MIN. QFE PRESSURE IN HPA 760.0 761.2 756.2 765.6 765.5 765.2 763.8 765.2 767.9 771.1 768.8 759.2 756.2 DAY 25 7 6 4 23 12 14 13 3 4 8 25 MEAN QNH PRESSURE IN HPA 1013.3 1013.1 1012.6 1016.9 1014.9 1015.0 1012.6 1014.0 1018.8 1020.7 1019.1 1013.3 1015.4 MAX. QNH PRESSURE IN HPA 1020.3 1024.0 1019.3 1022.1 1019.0 1020.6 1016.2 1017.7 1021.7 1024.2 1022.2 1021.1 1024.2 DAY 12 15 18 19 9 22 1 31 29 20 2 8 MIN. QNH PRESSURE IN HPA 1003.9 1005.4 999.2 1011.0 1010.8 1010.5 1008.7 1010.5 1013.8 1017.8 1015.0 1002.9 999.2 DAY 25 7 6 4 23 12 14 13 3 4 8 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 KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 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 767.9 767.5 767.2 770.3 768.8 768.8 766.8 767.9 772.0 773.7 772.6 767.9 769.3 MAX. QFE PRESSURE IN HPA 773.5 776.0 772.3 775.0 772.3 773.3 769.6 771.4 775.2 776.6 775.1 773.8 776.6 DAY 12 15 18 19 2 22 1 31 29 20 2 8 MIN. QFE PRESSURE IN HPA 760.0 761.2 758.7 766.0 765.6 765.4 764.2 765.0 768.0 770.8 769.7 759.0 758.7 DAY 25 7 6 4 23 11 14 12 3 4 8 31 MEAN QNH PRESSURE IN HPA 1013.9 1013.4 1012.9 1016.8 1014.9 1015.0 1012.5 1013.9 1019.0 1021.1 1019.7 1013.8 1015.6 MAX. QNH PRESSURE IN HPA 1020.8 1024.0 1019.3 1022.7 1019.3 1020.6 1016.0 1018.2 1023.0 1024.7 1022.8 1021.2 1024.7 DAY 12 15 18 19 2 22 1 31 29 20 2 8 MIN. QNH PRESSURE IN HPA 1003.9 1005.4 1002.3 1011.5 1011.0 1010.7 1009.2 1010.2 1014.0 1017.5 1016.1 1002.7 1002.3 DAY 25 7 6 4 23 11 14 12 3 4 8 31 MEAN QFF PRESSURE IN HPA 1018.6 1017.9 1012.0 1008.3 1002.9 997.6 991.7 993.8 1003.3 1012.0 1015.5 1016.7 1007.5 MAX. QFF PRESSURE IN HPA 1032.8 1034.7 1021.6 1013.4 1007.7 1005.2 997.0 999.3 1013.1 1017.5 1020.9 1036.4 1036.4 DAY 12 15 8 14 8 1 2 30 29 22 27 23 MIN. QFF PRESSURE IN HPA 1006.3 1006.8 1001.3 1003.0 998.8 992.5 988.7 989.8 996.1 1008.1 1006.7 1000.7 988.7 DAY 25 7 6 28 16 12 8 11 3 14 5 31 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 KOOHRANG (40797) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 32 26 N LONGITUDE 50 7 E DATA PROCESSING CENTER ELEVATION 2285.0 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) -8.0 -5.5 -4.1 4.1 11.7 18.2 23.1 21.3 16.8 11.3 5.3 -2.5 7.6 MINIMUN AIR TEMPERATURE (C) -14.7 -10.7 -9.9 -1.3 5.9 10.4 14.5 13.1 8.9 2.3 0.2 -6.6 1.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH MINIMUM TEMP. <=-4 28 24 23 8 0 0 0 0 0 0 4 21 108 DAYS WITH FREEZING MIN.<= 0 31 29 30 16 0 0 0 0 0 4 13 29 152 TEMPERATURE RECORDS LOWEST(C) -30.6 -25.0 -21.6 -11.6 1.0 6.2 11.0 8.6 4.6 -1.8 -11.6 -18.6 -30.6 DAY 29 12 1 2 14 21 12 31 30 29 27 24 MAXIMUM AIR TEMPERATURE (C) -2.3 0.8 2.0 9.1 16.3 24.2 30.0 28.3 23.6 19.4 10.7 2.1 13.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 0 1 20 9 0 0 0 0 30 DAYS WITH MAXIMUM TEMP. <= 0 19 11 9 0 0 0 0 0 0 0 1 6 46 TEMPERATURE RECORDS HIGHEST(C) 3.5 7.2 8.0 12.5 24.0 30.4 32.2 32.4 26.0 23.2 17.0 6.4 32.4 DAY 21 22 30 30 30 30 7 5 2 3 19 3 DIF. BETWEEN (MAX.-MIN.) (C) 12.4 11.5 11.9 10.4 10.4 13.8 15.5 15.2 14.7 17.1 10.5 8.7 12.7 MEAN DAILY TEMP. (MDT) (C) -8.5 -4.9 -3.9 3.9 11.1 17.3 22.3 20.7 16.2 10.9 5.4 -2.3 7.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 0.0 1.3 45.4 20.7 0.0 0.0 0.0 0.0 67.4 HEATING DEG. DAYS(BASE 18 0C) 821.0 665.4 679.8 422.7 213.7 34.8 0.0 4.5 54.3 221.5 377.1 627.8 4122.6 DEWPOINT (MEAN C) -13.9 -11.1 -9.1 -3.8 0.4 0.6 2.4 3.7 -2.5 -4.7 -3.8 -8.4 -4.2 MIXING RATIO (G/KG) 1.94 2.40 2.74 3.92 5.28 5.34 6.06 6.62 4.24 3.61 4.05 2.89 4.09 VAPOUR PRESSURE (HPA) 2.37 2.94 3.35 4.82 6.48 6.55 7.42 8.11 5.23 4.45 5.00 3.55 5.02 SATURATION DEF. (HPA) 1.36 1.44 1.49 3.75 7.74 15.16 21.86 18.31 14.74 9.79 4.33 1.76 8.48 RELATIVE HUMIDITY (MEAN %) 65 68 70 58 49 33 28 34 29 36 57 67 50 RELATIVE HUMIDITY (MAX. %) 81 85 88 76 70 53 47 53 48 59 81 86 69 RELATIVE HUMIDITY (MIN. %) 49 50 50 42 32 21 17 21 17 19 36 47 33 RELATIVE HUMIDITY (MEAN% 03UTC) 72 74 80 68 61 49 45 52 44 57 71 74 62 RELATIVE HUMIDITY (MEAN% 09UTC) 65 60 58 48 42 26 19 23 19 23 48 60 41 RELATIVE HUMIDITY (MEAN% 15UTC) 61 65 66 54 45 27 20 26 26 24 50 62 44 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 204.7 299.7 268.7 184.4 108.0 4.2 0.0 0.0 0.0 0.0 197.3 300.8 1567.8 DAYS WITH PRECIPITATION >=10 6 7 9 6 3 0 0 0 0 0 4 9 44 DAYS WITH PRECIPITATION >= 5 10 10 10 8 3 0 0 0 0 0 12 12 65 DAYS WITH PRECIPITATION >= 1 14 19 15 13 11 2 0 0 0 0 12 13 99 DAYS WITH PRECIPITATION 15 20 16 15 15 3 0 0 2 1 13 18 118 GREATEST DAILY PRECIPITATION 33.0 92.0 64.0 41.0 58.0 2.0 0.0 0.0 0.0 0.0 57.0 53.0 92.0 DAY 31 24 15 24 6