STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1987 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 6.6 9.2 11.3 18.0 23.9 28.4 28.9 28.7 26.0 16.7 13.2 8.9 18.3 MINIMUN AIR TEMPERATURE (C) -5.3 -3.2 3.3 6.2 12.0 14.6 16.7 16.6 13.5 5.4 0.1 -3.0 6.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 1 3 0 0 0 0 4 DAYS WITH MINIMUM TEMP. <=-4 23 13 0 0 0 0 0 0 0 0 5 10 51 DAYS WITH FREEZING MIN.<= 0 29 25 7 1 0 0 0 0 0 3 16 24 105 TEMPERATURE RECORDS LOWEST(C) -10.2 -7.5 -1.8 -0.6 5.0 10.0 10.6 11.8 6.4 -1.6 -6.0 -15.2 -15.2 DAY 8 24 22 8 9 2 4 27 30 18 30 3 MAXIMUM AIR TEMPERATURE (C) 14.0 15.8 16.5 24.0 29.9 33.9 34.5 34.2 32.3 23.0 20.0 15.4 24.5 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 2 15 29 30 31 27 0 0 0 134 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 18.6 20.2 20.5 30.6 32.5 37.2 37.4 36.0 35.6 29.0 24.0 22.2 37.4 DAY 20 2 6 27 27 9 10 28 6 3 3 19 DIF. BETWEEN (MAX.-MIN.) (C) 19.3 19.0 13.2 17.8 17.9 19.3 17.8 17.6 18.8 17.6 19.9 18.4 18.1 MEAN DAILY TEMP. (MDT) (C) 4.3 6.3 9.9 15.1 21.0 24.3 25.6 25.4 22.9 14.2 10.0 6.2 15.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 24.5 100.1 142.6 136.7 70.7 0.0 0.0 0.0 474.7 HEATING DEG. DAYS(BASE 18 0C) 423.7 327.2 251.0 98.1 1.8 0.0 0.0 0.0 1.3 123.2 239.0 366.7 1832.0 DEWPOINT (MEAN C) ***** -5.0 -2.1 -1.6 3.2 5.0 8.9 6.1 3.1 -1.0 -4.8 -10.0 ***** MIXING RATIO (G/KG) ****** 3.38 4.30 4.35 6.12 7.03 9.26 7.54 6.11 4.62 3.43 2.39 ****** VAPOUR PRESSURE (HPA) ****** 4.41 5.58 5.66 7.94 9.07 11.90 9.72 7.92 6.03 4.48 3.13 ****** SATURATION DEF. (HPA) ****** 8.19 8.34 16.58 23.07 31.33 29.75 31.14 27.69 14.56 12.16 9.25 ****** RELATIVE HUMIDITY (MEAN %) *** 41 45 32 29 24 31 26 24 34 31 28 *** RELATIVE HUMIDITY (MAX. %) 69 71 73 60 48 37 45 43 39 52 52 45 53 RELATIVE HUMIDITY (MIN. %) 20 25 28 18 19 18 24 18 16 24 21 18 21 RELATIVE HUMIDITY (MEAN% 03UTC) 69 71 71 60 48 36 43 43 39 50 52 44 52 RELATIVE HUMIDITY (MEAN% 09UTC) 27 31 35 22 22 20 26 20 20 29 24 22 25 RELATIVE HUMIDITY (MEAN% 15UTC) 34 32 36 23 23 22 28 22 19 32 27 23 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 1.0 3.0 32.2 14.0 0.6 0.0 3.0 0.0 0.0 6.0 0.0 7.0 66.8 DAYS WITH PRECIPITATION >=10 0 0 1 1 0 0 0 0 0 0 0 0 2 DAYS WITH PRECIPITATION >= 5 0 0 3 1 0 0 0 0 0 1 0 1 6 DAYS WITH PRECIPITATION >= 1 1 1 4 2 0 0 1 0 0 1 0 1 11 DAYS WITH PRECIPITATION 1 1 6 2 1 0 1 0 0 1 0 1 14 GREATEST DAILY PRECIPITATION 1.0 3.0 16.0 11.0 0.6 0.0 3.0 0.0 0.0 6.0 0.0 7.0 16.0 DAY 8 11 30 5 8 ** 28 ** ** 27 ** 29 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 0 1 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 4 8 5 1 0 0 0 2 2 1 0 1 24 WIND DIRECTION (PREVAILING) 180 180 180 180 180 360 360 360 180 180 180 180 180 PREVAILING WIND SPEED(KNOTS) 6.9 8.3 10.4 8.2 5.6 8.8 10.3 10.1 5.7 5.5 7.3 8.6 6.9 PREVAILING WIND PERCENT 18.7 18.6 34.2 22.0 27.7 19.3 28.4 37.4 28.7 20.6 14.5 16.1 20.7 CALMS PERCENT OF WIND 31.6 22.1 18.7 28.0 20.6 14.0 7.1 5.8 16.7 31.0 51.7 32.3 23.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 145 155 1820 VECTOR WIND DIRECTION (MEAN) 208 209 202 231 196 356 14 6 180 215 211 177 214 VECTOR WIND MAGNITUDE(KNOTS) 1.9 2.9 5.7 3.6 0.9 1.6 2.6 3.3 1.9 1.5 0.7 2.5 1.2 WIND STEADINESES (MEAN %) 46.3 45.3 67.9 57.1 18.0 30.8 35.6 48.5 37.3 33.3 17.5 37.9 20.7 WIND SPEED (MEAN KNOTS) 4.1 6.4 8.4 6.3 5.0 5.2 7.3 6.8 5.1 4.5 4.0 6.6 5.8 FASTEST WIND DIRECTION 200 230 270 240 360 360 220 360 210 200 220 350 240 FASTEST WIND SPEED (KNOTS) 23 23 27 29 16 16 17 16 17 19 19 23 29 DAY 26 5 16 4 1 28 4 6 29 25 3 1 DAYS WITH SKY CLEAR (0-2)/8 26 17 13 22 15 29 26 26 28 22 25 21 270 DAYS WITH P.CLOUDY (3-6)/8 5 10 13 7 14 1 5 5 2 8 4 10 84 DAYS WITH CLOUDY (7-8)/8 0 1 5 1 2 0 0 0 0 1 0 0 10 DAYS WITH VISIBILITY =< 2 KM 0 0 2 1 0 0 0 1 0 3 0 0 7 DURATION OF SUNSHINE HOURS 265.8 236.9 205.2 288.6 285.3 350.5 337.9 321.7 298.2 272.3 271.3 262.4 3396.1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 ****** 816.4 812.6 816.0 815.6 812.4 812.0 811.9 815.4 818.3 818.9 817.9 ****** MAX. QFE PRESSURE IN HPA ****** 823.4 819.8 820.6 820.0 817.8 816.6 818.0 821.8 822.2 824.1 825.7 ****** DAY-HOUR **-** 1- 6 2- 6 17- 6 5- 6 28- 6 29- 6 7- 6 26- 6 29- 6 30- 6 1- 6 MIN. QFE PRESSURE IN HPA ****** 807.6 806.2 811.0 810.1 806.9 806.4 807.4 811.3 813.0 814.0 807.7 ****** DAY-HOUR **-** 10-15 14-12 5- 9 6-15 12-15 3-12 29-12 2-15 21-15 26-12 31-12 MEAN QNH PRESSURE IN HPA ****** 1018.8 1014.3 1018.4 1017.9 1014.1 1013.6 1013.5 1017.6 1021.1 1021.9 1020.7 ****** MAX. QNH PRESSURE IN HPA ****** 1027.3 1023.0 1023.9 1023.2 1020.6 1019.1 1020.8 1025.4 1025.8 1028.1 1030.0 ****** DAY-HOUR **-** 1- 6 2- 6 17- 6 5- 6 28- 6 29- 6 7- 6 26- 6 29- 6 30- 6 1- 6 MIN. QNH PRESSURE IN HPA ****** 1008.4 1006.7 1012.4 1011.3 1007.5 1006.9 1008.1 1012.8 1014.8 1016.0 1008.5 ****** DAY-HOUR **-** 10-15 14-12 5- 9 6-15 12-15 3-12 29-12 2-15 21-15 26-12 31-12 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 819.0 816.9 813.1 816.4 816.3 813.1 812.7 812.8 816.1 818.8 819.4 818.5 816.1 MAX. QFE PRESSURE IN HPA 823.0 822.4 818.8 819.3 819.6 817.5 815.9 817.1 820.9 821.7 823.2 824.5 824.5 DAY 20 1 4 17 3 29 30 7 26 29 30 1 MIN. QFE PRESSURE IN HPA 817.0 812.8 806.8 811.4 812.2 808.1 808.8 810.0 813.5 815.2 816.3 810.3 806.8 DAY 9 11 14 5 23 13 4 25 11 21 11 31 MEAN QNH PRESSURE IN HPA 1022.0 1019.5 1014.9 1018.9 1018.7 1014.9 1014.5 1014.6 1018.5 1021.8 1022.5 1021.3 1018.5 MAX. QNH PRESSURE IN HPA 1026.8 1026.1 1021.8 1022.4 1022.7 1020.2 1018.3 1019.7 1024.3 1025.2 1027.0 1028.6 1028.6 DAY 20 1 4 17 3 29 30 7 26 29 30 1 MIN. QNH PRESSURE IN HPA 1019.6 1014.6 1007.4 1012.9 1013.9 1008.9 1009.8 1011.2 1015.4 1017.5 1018.8 1011.6 1007.4 DAY 9 11 14 5 23 13 4 25 11 21 11 31 MEAN QFF PRESSURE IN HPA 1022.9 1017.9 1009.9 1010.2 1005.1 998.3 997.0 997.6 1004.0 1014.3 1018.4 1020.5 1009.7 MAX. QFF PRESSURE IN HPA 1028.5 1025.7 1017.8 1015.7 1011.7 1007.8 1003.5 1002.1 1011.7 1021.9 1030.7 1035.8 1035.8 DAY 19 1 2 3 3 1 30 8 26 18 30 2 MIN. QFF PRESSURE IN HPA 1019.2 1010.5 999.6 1004.8 999.7 992.3 990.5 993.0 999.0 1006.6 1013.2 1010.5 990.5 DAY 27 18 14 20 23 11 26 18 2 4 4 31 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 820.3 818.0 813.7 817.3 817.0 813.7 813.3 813.4 817.0 819.7 820.4 819.5 816.9 MAX. QFE PRESSURE IN HPA 824.1 823.4 819.8 820.6 820.0 817.8 816.6 818.0 821.8 822.2 824.1 825.7 825.7 DAY 19 1 2 17 5 28 29 7 26 29 30 1 MIN. QFE PRESSURE IN HPA 817.8 814.0 807.4 812.4 813.4 808.6 809.4 810.6 814.6 816.0 817.2 811.0 807.4 DAY 9 10 14 5 7 13 4 25 2 21 11 31 MEAN QNH PRESSURE IN HPA 1023.6 1020.8 1015.7 1020.0 1019.6 1015.7 1015.1 1015.3 1019.6 1022.8 1023.7 1022.6 1019.5 MAX. QNH PRESSURE IN HPA 1028.1 1027.3 1023.0 1023.9 1023.2 1020.6 1019.1 1020.8 1025.4 1025.8 1028.1 1030.0 1030.0 DAY 19 1 2 17 5 28 29 7 26 29 30 1 MIN. QNH PRESSURE IN HPA 1020.6 1016.0 1008.1 1014.1 1015.3 1009.5 1010.5 1011.9 1016.7 1018.4 1019.8 1012.4 1008.1 DAY 9 10 14 5 7 13 4 25 2 21 11 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 819.6 817.0 812.9 816.4 816.0 812.8 812.3 812.3 815.9 818.7 819.1 817.9 815.9 MAX. QFE PRESSURE IN HPA 823.0 822.5 818.3 819.5 818.8 817.6 815.5 816.6 820.9 822.0 822.8 824.2 824.2 DAY 19 1 2 22 11 28 29 7 26 24 30 1 MIN. QFE PRESSURE IN HPA 816.6 812.5 807.0 811.0 812.5 807.6 807.8 809.6 813.5 814.8 815.6 810.0 807.0 DAY 9 10 14 5 7 13 3 25 2 11 26 31 MEAN QNH PRESSURE IN HPA 1022.8 1019.6 1014.7 1018.9 1018.4 1014.6 1014.0 1014.0 1018.3 1021.6 1022.1 1020.7 1018.3 MAX. QNH PRESSURE IN HPA 1026.8 1026.2 1021.2 1022.6 1021.8 1020.3 1017.8 1019.1 1024.3 1025.6 1026.5 1028.2 1028.2 DAY 19 1 2 22 11 28 29 7 26 24 30 1 MIN. QNH PRESSURE IN HPA 1019.1 1014.2 1007.6 1012.4 1014.2 1008.4 1008.6 1010.7 1015.4 1017.0 1017.9 1011.2 1007.6 DAY 9 10 14 5 7 13 3 25 2 11 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 818.1 814.9 811.4 814.8 814.5 811.4 810.9 810.7 814.0 817.1 817.7 816.5 814.3 MAX. QFE PRESSURE IN HPA 821.2 821.0 816.6 818.0 818.9 816.5 814.4 816.2 818.9 819.9 821.7 822.3 822.3 DAY 17 1 1 22 2 28 29 7 26 24 30 1 MIN. QFE PRESSURE IN HPA 815.0 809.0 806.2 811.2 810.5 807.0 806.4 807.4 811.4 813.2 814.0 807.7 806.2 DAY 9 10 14 5 6 13 3 29 11 21 26 31 MEAN QNH PRESSURE IN HPA 1020.9 1017.1 1012.9 1017.0 1016.6 1013.0 1012.3 1012.1 1016.0 1019.7 1020.4 1019.0 1016.4 MAX. QNH PRESSURE IN HPA 1024.6 1024.4 1019.1 1020.8 1021.9 1019.0 1016.5 1018.6 1021.9 1023.1 1025.2 1025.9 1025.9 DAY 17 1 1 22 2 28 29 7 26 24 30 1 MIN. QNH PRESSURE IN HPA 1017.2 1010.0 1006.7 1012.7 1011.8 1007.6 1006.9 1008.1 1012.9 1015.1 1016.0 1008.5 1006.7 DAY 9 10 14 5 6 13 3 29 11 21 26 31 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 818.4 815.1 811.7 815.0 814.2 811.2 810.8 810.6 813.9 817.1 818.0 817.1 814.4 MAX. QFE PRESSURE IN HPA 821.8 821.4 817.8 818.2 817.1 816.5 814.8 815.4 819.0 820.2 822.3 822.5 822.5 DAY 17 1 2 22 11 28 29 7 25 15 30 1 MIN. QFE PRESSURE IN HPA 815.4 807.6 806.2 812.4 810.1 806.9 806.5 807.4 811.3 813.0 814.5 808.2 806.2 DAY 9 10 14 6 6 12 3 29 2 21 26 31 MEAN QNH PRESSURE IN HPA 1021.3 1017.3 1013.3 1017.3 1016.3 1012.6 1012.1 1011.9 1016.0 1019.7 1020.9 1019.8 1016.5 MAX. QNH PRESSURE IN HPA 1025.4 1024.9 1020.6 1021.0 1019.7 1019.0 1017.0 1017.7 1022.0 1023.4 1025.9 1026.2 1026.2 DAY 17 1 2 22 11 28 29 7 25 15 30 1 MIN. QNH PRESSURE IN HPA 1017.7 1008.4 1006.7 1014.1 1011.3 1007.5 1007.0 1008.1 1012.8 1014.8 1016.6 1009.1 1006.7 DAY 9 10 14 6 6 12 3 29 2 21 26 31 MEAN QFF PRESSURE IN HPA 1022.1 1015.6 1008.3 1008.4 1002.7 995.6 994.5 994.9 1001.4 1012.1 1016.8 1018.8 1007.6 MAX. QFF PRESSURE IN HPA 1026.3 1022.8 1014.7 1013.4 1008.8 1004.4 1002.2 1000.0 1010.8 1020.5 1030.0 1032.5 1032.5 DAY 19 1 2 22 3 1 29 7 30 17 30 1 MIN. QFF PRESSURE IN HPA 1017.3 1005.9 999.8 1002.3 998.0 989.4 988.6 990.6 995.4 1004.7 1010.6 1008.6 988.6 DAY 26 10 14 19 29 9 26 28 1 3 3 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 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1988 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.0 7.0 12.4 17.1 24.5 28.7 31.3 29.1 25.3 19.2 12.4 8.2 18.4 MINIMUN AIR TEMPERATURE (C) -3.6 -0.7 2.8 6.5 10.2 13.5 19.5 17.2 11.4 5.8 -0.9 0.7 6.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 8 3 0 0 0 0 11 DAYS WITH MINIMUM TEMP. <=-4 15 7 1 0 0 0 0 0 0 0 7 2 32 DAYS WITH FREEZING MIN.<= 0 24 16 11 2 0 0 0 0 0 0 12 16 81 TEMPERATURE RECORDS LOWEST(C) -13.0 -7.6 -4.0 -1.0 7.0 10.0 13.0 9.4 6.4 0.2 -9.6 -7.4 -13.0 DAY 4 7 16 3 14 1 1 12 30 30 24 30 MAXIMUM AIR TEMPERATURE (C) 10.3 12.3 18.2 22.8 30.3 34.7 36.5 34.4 31.7 25.8 18.8 13.3 24.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 18 30 31 31 23 0 0 0 133 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.8 16.8 22.6 27.6 34.6 37.0 38.6 37.0 35.0 28.0 23.0 17.0 38.6 DAY 28 29 22 18 28 19 3 7 7 8 4 6 DIF. BETWEEN (MAX.-MIN.) (C) 13.9 13.0 15.4 16.3 20.1 21.2 17.0 17.2 20.3 20.0 19.7 12.6 17.2 MEAN DAILY TEMP. (MDT) (C) 3.4 5.8 10.5 14.7 20.2 24.1 28.0 25.8 21.6 15.8 8.9 7.0 15.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 10.6 92.9 209.7 149.6 38.3 0.0 0.0 0.0 501.1 HEATING DEG. DAYS(BASE 18 0C) 453.7 354.2 232.8 100.3 0.0 0.0 0.0 0.0 1.6 68.5 272.1 340.6 1823.8 DEWPOINT (MEAN C) -9.0 -6.8 -4.9 -1.6 -0.9 0.8 6.4 3.9 1.1 -3.1 -5.4 -4.0 -2.0 MIXING RATIO (G/KG) 2.55 3.00 3.46 4.36 4.56 5.07 7.69 6.47 5.36 3.80 3.28 3.82 4.45 VAPOUR PRESSURE (HPA) 3.32 3.91 4.50 5.67 5.93 6.56 9.87 8.33 6.95 4.96 4.30 4.97 5.77 SATURATION DEF. (HPA) 5.88 6.64 10.72 15.01 26.43 34.90 37.42 33.42 27.56 18.79 11.45 6.43 19.55 RELATIVE HUMIDITY (MEAN %) 40 41 34 32 21 18 23 21 22 24 30 47 29 RELATIVE HUMIDITY (MAX. %) 58 63 55 55 41 28 35 32 31 39 46 69 46 RELATIVE HUMIDITY (MIN. %) 27 26 21 19 12 13 16 16 15 16 21 32 20 RELATIVE HUMIDITY (MEAN% 03UTC) 57 62 54 55 41 27 35 31 31 39 46 66 45 RELATIVE HUMIDITY (MEAN% 09UTC) 33 34 26 24 15 14 20 18 20 18 24 39 24 RELATIVE HUMIDITY (MEAN% 15UTC) 34 33 28 26 14 14 17 16 16 20 27 45 24 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 69.0 53.0 34.0 21.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 32.1 220.1 DAYS WITH PRECIPITATION >=10 4 3 2 1 0 0 0 0 0 0 1 1 12 DAYS WITH PRECIPITATION >= 5 6 3 2 2 0 0 0 0 0 0 1 3 17 DAYS WITH PRECIPITATION >= 1 6 5 5 4 0 0 0 0 0 0 1 4 25 DAYS WITH PRECIPITATION 6 5 5 4 0 0 0 0 0 0 1 5 26 GREATEST DAILY PRECIPITATION 21.0 27.0 19.0 12.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 17.0 27.0 DAY 8 25 24 26 ** ** ** ** ** ** 30 27 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH DUST 1 1 2 1 0 0 0 0 0 0 1 0 6 WIND DIRECTION (PREVAILING) 90 180 225 270 270 180 360 360 180 270 270 180 180 PREVAILING WIND SPEED(KNOTS) 8.9 12.6 14.9 10.0 9.5 8.1 14.4 15.0 6.5 9.2 11.3 12.4 8.8 PREVAILING WIND PERCENT 16.8 22.8 23.2 22.0 32.9 26.0 19.4 14.2 26.8 12.3 12.0 14.8 16.0 CALMS PERCENT OF WIND 32.9 30.3 20.6 22.0 25.2 22.0 27.1 41.3 36.6 32.3 44.0 58.1 32.7 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 142 155 150 155 1822 VECTOR WIND DIRECTION (MEAN) 165 185 228 227 252 228 48 15 186 210 195 188 210 VECTOR WIND MAGNITUDE(KNOTS) 2.5 4.3 4.9 3.5 3.5 2.4 2.5 1.4 1.5 0.6 1.1 2.3 1.7 WIND STEADINESES (MEAN %) 39.1 58.1 55.1 49.3 53.0 35.3 30.1 23.7 33.3 9.7 20.8 57.5 26.2 WIND SPEED (MEAN KNOTS) 6.4 7.4 8.9 7.1 6.6 6.8 8.3 5.9 4.5 6.2 5.3 4.0 6.5 FASTEST WIND DIRECTION 250 180 220 270 280 10 360 360 240 360 240 180 180 FASTEST WIND SPEED (KNOTS) 27 39 33 19 17 23 23 27 14 19 17 23 39 DAY 26 3 9 5 7 7 14 1 4 4 28 27 DAYS WITH SKY CLEAR (0-2)/8 19 14 17 9 27 28 24 25 29 29 19 14 254 DAYS WITH P.CLOUDY (3-6)/8 6 10 10 19 4 2 7 6 0 2 11 10 87 DAYS WITH CLOUDY (7-8)/8 6 5 4 2 0 0 0 0 0 0 0 7 24 DAYS WITH VISIBILITY =< 2 KM 0 2 1 0 0 0 0 0 0 0 0 0 3 DURATION OF SUNSHINE HOURS 215.6 203.4 224.0 230.8 360.9 359.8 331.5 338.3 307.8 312.9 261.5 179.7 3326.2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.2 814.1 813.2 815.0 814.5 811.6 808.7 810.4 814.2 817.8 818.4 816.2 814.1 MAX. QFE PRESSURE IN HPA 823.2 820.8 818.0 822.0 819.3 817.4 814.2 815.1 819.1 823.0 823.7 822.6 823.7 DAY-HOUR 3- 6 7- 6 17- 6 12- 6 3- 6 1- 6 31- 6 21- 6 14- 6 17- 6 5- 6 3- 6 MIN. QFE PRESSURE IN HPA 808.8 807.8 806.6 810.0 810.0 805.6 804.0 806.5 810.2 812.4 812.8 807.5 804.0 DAY-HOUR 19-12 3-12 23-15 28-12 19-12 30-12 17-15 24-12 1-15 7-12 30-15 26-12 MEAN QNH PRESSURE IN HPA 1017.4 1016.1 1015.1 1017.2 1016.6 1013.1 1009.6 1011.7 1016.2 1020.6 1021.3 1018.6 1016.1 MAX. QNH PRESSURE IN HPA 1027.0 1024.2 1020.8 1025.6 1022.4 1020.1 1016.3 1017.3 1022.1 1026.8 1027.6 1026.3 1027.6 DAY-HOUR 3- 6 7- 6 17- 6 12- 6 3- 6 1- 6 31- 6 21- 6 14- 6 17- 6 5- 6 3- 6 MIN. QNH PRESSURE IN HPA 1009.8 1008.6 1007.2 1011.2 1011.2 1006.0 1004.0 1007.0 1011.5 1014.1 1014.6 1008.2 1004.0 DAY-HOUR 19-12 3-12 23-15 28-12 19-12 30-12 17-15 24-12 1-15 7-12 30-15 26-12 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 815.3 814.4 813.6 815.3 815.1 812.4 809.6 811.2 814.8 818.2 818.9 816.4 814.6 MAX. QFE PRESSURE IN HPA 822.8 819.5 817.0 820.1 818.2 816.7 813.6 814.0 818.2 821.6 822.5 821.6 822.8 DAY 3 7 16 12 4 1 31 21 14 17 6 3 MIN. QFE PRESSURE IN HPA 809.0 810.4 809.0 812.3 812.6 807.8 806.6 809.0 812.0 814.2 815.2 809.9 806.6 DAY 19 17 24 25 1 30 18 25 2 8 29 26 MEAN QNH PRESSURE IN HPA 1017.6 1016.5 1015.5 1017.6 1017.3 1014.1 1010.8 1012.7 1017.0 1021.0 1021.8 1018.9 1016.7 MAX. QNH PRESSURE IN HPA 1026.5 1022.6 1019.6 1023.3 1021.0 1019.2 1015.5 1016.0 1021.0 1025.1 1026.2 1025.1 1026.5 DAY 3 7 16 12 4 1 31 21 14 17 6 3 MIN. QNH PRESSURE IN HPA 1010.0 1011.7 1010.0 1014.0 1014.3 1008.6 1007.2 1010.0 1013.6 1016.3 1017.5 1011.1 1007.2 DAY 19 17 24 25 1 30 18 25 2 8 29 26 MEAN QFF PRESSURE IN HPA 1018.3 1015.3 1010.5 1009.2 1003.7 997.7 991.9 995.5 1003.6 1012.7 1018.8 1017.0 1007.9 MAX. QFF PRESSURE IN HPA 1030.9 1026.8 1019.5 1015.5 1009.0 1004.9 997.0 1001.1 1008.5 1018.1 1025.4 1028.6 1030.9 DAY 3 7 16 4 4 10 31 31 30 28 26 30 MIN. QFF PRESSURE IN HPA 1009.0 1006.4 1002.4 1003.6 999.9 989.7 987.2 992.2 998.6 1006.2 1013.9 1006.4 987.2 DAY 19 17 23 23 19 30 18 23 12 8 20 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 816.5 815.7 814.7 816.4 815.9 813.1 810.1 811.9 815.8 819.4 820.0 817.6 815.6 MAX. QFE PRESSURE IN HPA 823.2 820.8 818.0 822.0 819.3 817.4 814.2 815.1 819.1 823.0 823.7 822.6 823.7 DAY 3 7 17 12 3 1 31 21 14 17 5 3 MIN. QFE PRESSURE IN HPA 810.8 810.9 809.5 812.7 813.1 808.1 807.1 810.0 812.7 815.3 816.2 810.7 807.1 DAY 19 3 24 25 1 30 18 24 2 7 29 26 MEAN QNH PRESSURE IN HPA 1019.0 1018.0 1016.8 1018.8 1018.3 1014.9 1011.3 1013.5 1018.1 1022.4 1023.2 1020.3 1017.9 MAX. QNH PRESSURE IN HPA 1027.0 1024.2 1020.8 1025.6 1022.4 1020.1 1016.3 1017.3 1022.1 1026.8 1027.6 1026.3 1027.6 DAY 3 7 17 12 3 1 31 21 14 17 5 3 MIN. QNH PRESSURE IN HPA 1012.2 1012.3 1010.6 1014.5 1014.9 1008.9 1007.8 1011.2 1014.5 1017.6 1018.6 1012.1 1007.8 DAY 19 3 24 25 1 30 18 24 2 7 29 26 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 815.6 814.5 813.6 815.4 814.9 811.9 808.9 810.7 814.4 818.0 818.5 816.4 814.4 MAX. QFE PRESSURE IN HPA 821.7 819.6 817.5 821.4 818.7 816.6 813.0 813.4 817.8 821.3 822.4 821.2 822.4 DAY 3 7 17 12 3 1 30 21 14 28 5 3 MIN. QFE PRESSURE IN HPA 810.1 808.1 810.0 811.9 812.1 807.0 806.0 808.4 811.6 814.1 814.7 809.1 806.0 DAY 19 3 14 25 19 30 18 24 3 7 29 26 MEAN QNH PRESSURE IN HPA 1017.9 1016.7 1015.6 1017.7 1017.1 1013.5 1009.9 1012.0 1016.4 1020.8 1021.4 1018.8 1016.5 MAX. QNH PRESSURE IN HPA 1025.2 1022.7 1020.2 1024.9 1021.6 1019.1 1014.8 1015.3 1020.6 1024.8 1026.1 1024.6 1026.1 DAY 3 7 17 12 3 1 30 21 14 28 5 3 MIN. QNH PRESSURE IN HPA 1011.3 1008.9 1011.2 1013.5 1013.7 1007.6 1006.4 1009.3 1013.1 1016.1 1016.9 1010.2 1006.4 DAY 19 3 14 25 19 30 18 24 3 7 29 26 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 814.0 812.7 812.0 813.8 813.5 810.5 807.5 809.2 812.9 816.6 817.1 814.9 812.9 MAX. QFE PRESSURE IN HPA 819.8 817.9 815.2 820.0 817.0 814.9 812.0 812.7 816.6 819.9 821.1 820.0 821.1 DAY 3 7 17 12 3 1 30 21 14 28 5 3 MIN. QFE PRESSURE IN HPA 808.8 807.8 807.1 810.0 810.0 805.6 804.5 806.5 810.4 812.4 812.9 807.5 804.5 DAY 19 3 23 28 19 30 17 24 2 7 30 26 MEAN QNH PRESSURE IN HPA 1016.0 1014.5 1013.6 1015.8 1015.4 1011.8 1008.2 1010.3 1014.7 1019.1 1019.7 1017.1 1014.7 MAX. QNH PRESSURE IN HPA 1023.0 1020.7 1017.5 1023.2 1019.6 1017.1 1013.6 1014.5 1019.1 1023.1 1024.5 1023.2 1024.5 DAY 3 7 17 12 3 1 30 21 14 28 5 3 MIN. QNH PRESSURE IN HPA 1009.8 1008.6 1007.8 1011.2 1011.2 1006.0 1004.6 1007.0 1011.7 1014.1 1014.7 1008.2 1004.6 DAY 19 3 23 28 19 30 17 24 2 7 30 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.6 813.2 812.3 814.1 813.3 810.1 807.4 809.2 813.0 817.0 817.6 815.7 813.1 MAX. QFE PRESSURE IN HPA 820.0 818.1 815.9 820.0 817.1 814.3 812.0 813.0 817.0 820.4 821.5 820.3 821.5 DAY 3 7 30 12 3 1 30 21 14 28 5 2 MIN. QFE PRESSURE IN HPA 809.1 808.1 806.6 810.2 810.4 806.0 804.0 806.5 810.2 812.5 812.8 808.9 804.0 DAY 19 3 23 28 19 30 17 24 1 7 30 27 MEAN QNH PRESSURE IN HPA 1016.7 1015.1 1014.0 1016.1 1015.2 1011.3 1008.1 1010.3 1014.9 1019.6 1020.4 1018.0 1015.0 MAX. QNH PRESSURE IN HPA 1023.2 1020.9 1018.3 1023.2 1019.7 1016.4 1013.6 1014.8 1019.6 1023.7 1025.0 1023.6 1025.0 DAY 3 7 30 12 3 1 30 21 14 28 5 2 MIN. QNH PRESSURE IN HPA 1010.2 1008.9 1007.2 1011.5 1011.7 1006.4 1004.0 1007.0 1011.5 1014.2 1014.6 1009.9 1004.0 DAY 19 3 23 28 19 30 17 24 1 7 30 27 MEAN QFF PRESSURE IN HPA 1017.4 1013.8 1008.9 1007.6 1001.6 994.8 989.2 993.1 1001.1 1011.2 1017.3 1016.2 1006.0 MAX. QFF PRESSURE IN HPA 1027.7 1024.5 1015.1 1017.3 1007.3 1001.5 996.5 998.1 1007.1 1016.7 1024.4 1026.5 1027.7 DAY 3 7 15 3 3 1 30 31 30 28 25 29 MIN. QFF PRESSURE IN HPA 1009.4 1005.7 1001.7 1001.7 996.4 987.8 982.8 989.3 995.3 1004.7 1011.5 1006.9 982.8 DAY 26 3 23 30 19 30 17 7 12 8 30 27 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 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1989 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 3.5 4.5 10.8 15.7 23.1 26.7 30.2 28.5 24.8 19.8 12.5 6.9 17.3 MINIMUN AIR TEMPERATURE (C) -6.0 -5.7 1.4 5.9 10.8 15.9 20.1 16.6 11.4 6.7 3.2 -1.6 6.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 12 1 0 0 0 0 14 DAYS WITH MINIMUM TEMP. <=-4 25 20 2 0 0 0 0 0 0 0 1 11 59 DAYS WITH FREEZING MIN.<= 0 28 23 14 4 0 0 0 0 0 0 6 21 96 TEMPERATURE RECORDS LOWEST(C) -12.6 -14.0 -4.0 -1.6 1.6 11.6 16.6 12.4 2.4 2.4 -4.8 -7.8 -14.0 DAY 19 15 1 1 3 1 22 31 25 23 26 23 MAXIMUM AIR TEMPERATURE (C) 9.0 10.2 16.0 20.5 28.1 34.4 34.6 33.3 30.6 25.9 17.8 11.9 22.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 9 30 31 31 19 1 0 0 121 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.8 16.4 21.2 26.8 34.4 37.8 38.0 35.0 33.2 30.0 22.2 17.6 38.0 DAY 22 28 4 19 28 26 9 12 6 10 1 1 DIF. BETWEEN (MAX.-MIN.) (C) 15.0 15.9 14.6 14.6 17.3 18.5 14.5 16.7 19.2 19.2 14.6 13.5 16.1 MEAN DAILY TEMP. (MDT) (C) 1.5 2.2 8.7 13.2 19.5 25.2 27.3 25.0 21.0 16.3 10.5 5.2 14.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 26.4 125.3 196.7 122.7 31.7 0.0 0.0 0.0 502.8 HEATING DEG. DAYS(BASE 18 0C) 511.4 441.6 288.3 143.8 28.4 0.0 0.0 0.0 9.0 56.0 226.0 397.7 2102.2 DEWPOINT (MEAN C) -11.2 -12.0 -5.7 -3.4 -0.8 1.3 5.1 4.4 1.6 0.1 -1.5 -5.3 -2.3 MIXING RATIO (G/KG) 2.14 2.10 3.31 3.87 4.57 5.25 6.96 6.68 5.48 4.86 4.44 3.35 4.42 VAPOUR PRESSURE (HPA) 2.78 2.74 4.29 5.03 5.94 6.80 8.98 8.62 7.11 6.34 5.80 4.37 5.73 SATURATION DEF. (HPA) 5.56 6.44 9.50 13.97 24.23 36.38 35.27 31.61 26.15 18.28 9.43 6.08 18.57 RELATIVE HUMIDITY (MEAN %) 38 33 36 31 22 17 22 22 23 28 42 46 30 RELATIVE HUMIDITY (MAX. %) 63 52 57 57 38 25 30 29 32 38 65 72 47 RELATIVE HUMIDITY (MIN. %) 21 20 23 19 15 12 17 17 18 22 27 30 20 RELATIVE HUMIDITY (MEAN% 03UTC) 62 49 56 55 38 25 29 28 31 38 64 71 46 RELATIVE HUMIDITY (MEAN% 09UTC) 30 27 31 22 18 15 19 20 21 25 33 36 25 RELATIVE HUMIDITY (MEAN% 15UTC) 31 25 27 25 17 14 18 19 19 23 33 37 24 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 2.0 0.0 37.2 19.6 0.0 0.0 0.6 0.0 0.0 0.0 17.0 26.0 102.4 DAYS WITH PRECIPITATION >=10 0 0 1 0 0 0 0 0 0 0 0 2 3 DAYS WITH PRECIPITATION >= 5 0 0 4 2 0 0 0 0 0 0 2 2 10 DAYS WITH PRECIPITATION >= 1 2 0 8 6 0 0 0 0 0 0 5 3 24 DAYS WITH PRECIPITATION 2 0 9 7 0 0 1 0 0 0 5 3 27 GREATEST DAILY PRECIPITATION 1.0 0.0 13.0 6.0 0.0 0.0 0.6 0.0 0.0 0.0 5.0 15.0 15.0 DAY 3 ** 19 30 ** ** 17 ** ** ** 8 5 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH DUST 4 4 4 0 6 1 2 0 0 0 0 1 22 WIND DIRECTION (PREVAILING) 270 270 270 180 270 270 360 360 360 180 270 180 270 PREVAILING WIND SPEED(KNOTS) 12.7 12.6 12.5 8.3 12.6 9.6 15.4 13.1 10.6 8.6 10.3 9.9 10.8 PREVAILING WIND PERCENT 16.8 18.6 21.9 16.7 22.6 22.7 38.1 29.7 20.0 14.8 22.0 19.4 13.8 CALMS PERCENT OF WIND 45.8 40.0 45.2 40.0 25.2 30.7 21.3 33.5 36.0 52.3 50.7 25.2 37.1 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 231 238 243 190 254 252 17 12 338 155 241 191 269 VECTOR WIND MAGNITUDE(KNOTS) 3.0 3.5 4.0 0.9 3.1 2.2 7.3 3.6 0.9 0.5 2.0 2.2 1.1 WIND STEADINESES (MEAN %) 50.8 56.5 64.5 16.1 41.3 33.8 69.5 48.6 15.8 11.6 45.5 34.9 17.2 WIND SPEED (MEAN KNOTS) 5.9 6.2 6.2 5.6 7.5 6.5 10.5 7.4 5.7 4.3 4.4 6.3 6.4 FASTEST WIND DIRECTION 260 250 260 360 320 100 360 360 360 360 270 190 260 FASTEST WIND SPEED (KNOTS) 39 39 39 23 35 19 35 23 17 16 19 27 39 DAY 17 23 30 30 6 30 21 6 23 10 21 4 DAYS WITH SKY CLEAR (0-2)/8 21 18 14 7 24 29 27 25 30 27 11 19 252 DAYS WITH P.CLOUDY (3-6)/8 10 7 13 17 5 1 4 6 0 4 15 6 88 DAYS WITH CLOUDY (7-8)/8 0 3 4 6 2 0 0 0 0 0 4 6 25 DAYS WITH VISIBILITY =< 2 KM 0 0 1 0 0 0 0 0 0 0 0 0 1 DURATION OF SUNSHINE HOURS 259.3 229.4 227.9 221.2 324.3 ****** ****** ****** 297.2 287.0 209.8 222.5 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 813.4 814.8 812.6 815.2 814.6 811.7 811.0 811.7 814.0 818.0 818.5 816.1 814.3 MAX. QFE PRESSURE IN HPA 818.7 820.7 818.4 820.3 818.1 815.6 814.5 815.8 822.0 824.3 823.2 821.4 824.3 DAY-HOUR 19- 6 8- 6 1- 6 9- 6 13- 6 3- 6 20- 6 31- 6 24- 6 27- 6 29- 6 1- 6 MIN. QFE PRESSURE IN HPA 807.7 807.7 806.8 810.8 810.3 806.5 806.8 805.6 809.0 813.2 814.7 811.6 805.6 DAY-HOUR 12-12 14- 9 29-12 23-12 31-15 7-12 5-15 1-15 11-15 1-12 24-12 23-12 MEAN QNH PRESSURE IN HPA 1015.3 1016.9 1014.3 1017.5 1016.7 1013.2 1012.4 1013.3 1016.0 1020.8 1021.4 1018.5 1016.4 MAX. QNH PRESSURE IN HPA 1021.6 1024.0 1021.3 1023.6 1020.9 1017.9 1016.6 1018.2 1025.6 1028.3 1027.0 1024.9 1028.3 DAY-HOUR 19- 6 8- 6 1- 6 9- 6 13- 6 3- 6 20- 6 31- 6 24- 6 27- 6 29- 6 1- 6 MIN. QNH PRESSURE IN HPA 1008.5 1008.5 1007.4 1012.2 1011.6 1007.0 1007.4 1006.0 1010.0 1015.1 1016.9 1013.1 1006.0 DAY-HOUR 12-12 14- 9 29-12 23-12 31-15 7-12 5-15 1-15 11-15 1-12 24-12 23-12 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 813.4 814.9 813.0 815.6 815.2 812.4 811.8 812.5 814.8 818.5 819.0 816.3 814.8 MAX. QFE PRESSURE IN HPA 817.4 819.5 817.5 819.4 817.6 815.0 814.2 814.9 820.8 822.7 822.6 820.4 822.7 DAY 19 26 1 9 13 3 20 31 24 27 29 1 MIN. QFE PRESSURE IN HPA 808.3 808.0 807.8 811.7 813.0 809.6 810.1 808.3 811.4 814.9 816.0 813.2 807.8 DAY 12 23 30 23 31 7 5 2 12 2 25 21 MEAN QNH PRESSURE IN HPA 1015.3 1017.1 1014.8 1017.9 1017.4 1014.2 1013.4 1014.2 1017.0 1021.4 1022.0 1018.7 1017.0 MAX. QNH PRESSURE IN HPA 1020.1 1022.6 1020.2 1022.5 1020.3 1017.2 1016.3 1017.1 1024.2 1026.4 1026.3 1023.7 1026.4 DAY 19 26 1 9 13 3 20 31 24 27 29 1 MIN. QNH PRESSURE IN HPA 1009.2 1008.8 1008.6 1013.3 1014.8 1010.7 1011.3 1009.2 1012.9 1017.1 1018.4 1015.1 1008.6 DAY 12 23 30 23 31 7 5 2 12 2 25 21 MEAN QFF PRESSURE IN HPA 1017.6 1018.8 1010.8 1010.3 1004.7 996.8 994.9 997.6 1003.8 1012.4 1017.5 1018.4 1008.7 MAX. QFF PRESSURE IN HPA 1028.3 1030.3 1018.9 1018.2 1014.1 999.7 999.2 1002.6 1016.2 1018.4 1024.8 1024.4 1030.3 DAY 19 26 1 1 2 3 22 31 24 27 26 19 MIN. QFF PRESSURE IN HPA 1005.7 1003.9 1004.2 1004.7 997.4 993.9 992.1 990.5 997.0 1006.0 1012.5 1010.9 990.5 DAY 12 23 28 23 31 7 14 2 12 2 12 5 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.9 816.2 814.0 816.5 816.1 813.1 812.2 813.1 815.6 819.6 820.0 817.4 815.7 MAX. QFE PRESSURE IN HPA 818.7 820.7 818.4 820.3 818.1 815.6 814.5 815.8 822.0 824.3 823.2 821.4 824.3 DAY 19 8 1 9 13 3 20 31 24 27 29 1 MIN. QFE PRESSURE IN HPA 809.6 809.5 807.8 812.4 813.8 809.6 810.1 809.0 812.2 816.0 817.4 814.8 807.8 DAY 12 14 30 23 31 7 5 1 12 2 12 15 MEAN QNH PRESSURE IN HPA 1017.1 1018.7 1016.0 1019.0 1018.5 1014.9 1013.9 1015.0 1017.9 1022.8 1023.2 1020.1 1018.1 MAX. QNH PRESSURE IN HPA 1021.6 1024.0 1021.3 1023.6 1020.9 1017.9 1016.6 1018.2 1025.6 1028.3 1027.0 1024.9 1028.3 DAY 19 8 1 9 13 3 20 31 24 27 29 1 MIN. QNH PRESSURE IN HPA 1010.7 1010.6 1008.6 1014.1 1015.8 1010.7 1011.3 1010.0 1013.9 1018.4 1020.1 1017.0 1008.6 DAY 12 14 30 23 31 7 5 1 12 2 12 15 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 813.7 815.1 813.0 815.5 814.9 812.0 811.1 812.0 814.2 818.2 818.5 816.1 814.5 MAX. QFE PRESSURE IN HPA 817.4 819.4 816.9 819.4 816.8 814.6 813.6 814.3 820.0 822.3 821.4 820.2 822.3 DAY 27 20 8 9 13 3 20 26 24 27 29 1 MIN. QFE PRESSURE IN HPA 808.5 807.7 807.7 811.2 812.6 807.9 809.1 808.0 811.0 815.0 816.2 813.1 807.7 DAY 12 14 30 23 31 7 5 1 12 2 12 23 MEAN QNH PRESSURE IN HPA 1015.7 1017.3 1014.8 1017.8 1017.1 1013.6 1012.6 1013.6 1016.2 1021.1 1021.4 1018.5 1016.6 MAX. QNH PRESSURE IN HPA 1020.1 1022.5 1019.5 1022.5 1019.4 1016.7 1015.5 1016.4 1023.2 1025.9 1024.9 1023.4 1025.9 DAY 27 20 8 9 13 3 20 26 24 27 29 1 MIN. QNH PRESSURE IN HPA 1009.4 1008.5 1008.5 1012.7 1014.3 1008.7 1010.2 1008.8 1012.4 1017.2 1018.6 1014.9 1008.5 DAY 12 14 30 23 31 7 5 1 12 2 12 23 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 812.3 813.6 811.3 814.2 813.5 810.6 809.9 810.6 812.6 816.6 817.3 814.8 813.1 MAX. QFE PRESSURE IN HPA 816.2 817.5 816.2 817.4 815.4 813.0 812.3 813.4 818.0 821.2 820.0 818.7 821.2 DAY 27 20 31 9 13 3 20 31 24 27 28 2 MIN. QFE PRESSURE IN HPA 807.7 808.0 806.8 810.8 810.7 806.5 807.3 806.0 809.3 813.2 814.7 811.6 806.0 DAY 12 14 29 23 31 7 5 1 12 1 24 23 MEAN QNH PRESSURE IN HPA 1014.0 1015.6 1012.8 1016.2 1015.4 1012.0 1011.1 1011.9 1014.3 1019.2 1019.9 1017.0 1014.9 MAX. QNH PRESSURE IN HPA 1018.6 1020.2 1018.6 1020.1 1017.7 1014.8 1014.0 1015.3 1020.8 1024.6 1023.2 1021.6 1024.6 DAY 27 20 31 9 13 3 20 31 24 27 28 2 MIN. QNH PRESSURE IN HPA 1008.5 1008.8 1007.4 1012.2 1012.1 1007.0 1008.0 1006.4 1010.4 1015.1 1016.9 1013.1 1006.4 DAY 12 14 29 23 31 7 5 1 12 1 24 23 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 812.8 814.1 811.7 814.4 813.5 810.2 809.9 810.6 812.7 817.1 818.0 815.7 813.4 MAX. QFE PRESSURE IN HPA 816.0 818.1 816.7 817.4 815.8 812.7 812.3 813.4 817.7 821.5 821.0 819.4 821.5 DAY 10 20 31 9 13 25 20 31 24 27 28 1 MIN. QFE PRESSURE IN HPA 809.2 808.8 808.0 811.0 810.3 806.5 806.8 805.6 809.0 813.4 815.1 812.5 805.6 DAY 17 12 29 22 31 7 5 1 11 1 5 31 MEAN QNH PRESSURE IN HPA 1014.5 1016.1 1013.2 1016.5 1015.4 1011.5 1011.1 1012.0 1014.4 1019.8 1020.8 1018.1 1015.3 MAX. QNH PRESSURE IN HPA 1018.4 1020.9 1019.2 1020.1 1018.2 1014.5 1014.0 1015.3 1020.4 1025.0 1024.4 1022.5 1025.0 DAY 10 20 31 9 13 25 20 31 24 27 28 1 MIN. QNH PRESSURE IN HPA 1010.3 1009.8 1008.8 1012.4 1011.6 1007.0 1007.4 1006.0 1010.0 1015.3 1017.3 1014.2 1006.0 DAY 17 12 29 22 31 7 5 1 11 1 5 31 MEAN QFF PRESSURE IN HPA 1016.8 1017.7 1009.3 1009.0 1002.5 994.0 992.5 995.2 1001.1 1010.6 1016.4 1017.9 1006.9 MAX. QFF PRESSURE IN HPA 1023.4 1026.6 1019.2 1014.9 1011.8 997.0 996.4 1000.3 1011.8 1016.1 1023.5 1022.7 1026.6 DAY 19 8 31 2 1 2 28 31 24 27 26 18 MIN. QFF PRESSURE IN HPA 1009.6 1007.6 1003.1 1003.6 994.4 990.3 987.7 988.9 993.8 1004.1 1012.3 1012.1 987.7 DAY 12 22 28 22 31 7 5 1 11 1 6 5 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1990 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.4 7.0 12.1 17.0 25.3 29.4 30.3 30.2 26.4 19.1 13.2 8.0 18.5 MINIMUN AIR TEMPERATURE (C) -3.1 -1.3 0.8 5.7 11.8 15.0 20.0 18.3 13.2 6.5 0.6 -4.0 7.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 10 4 1 0 0 0 16 DAYS WITH MINIMUM TEMP. <=-4 15 10 2 0 0 0 0 0 0 0 1 16 44 DAYS WITH FREEZING MIN.<= 0 26 19 16 1 0 0 0 0 0 1 11 28 102 TEMPERATURE RECORDS LOWEST(C) -10.6 -8.0 -8.0 -0.4 3.4 10.2 15.0 9.4 7.4 -1.4 -4.6 -16.6 -16.6 DAY 31 12 22 7 14 3 14 16 30 31 30 29 MAXIMUM AIR TEMPERATURE (C) 9.1 11.7 18.1 22.3 30.5 34.2 34.8 35.5 32.3 25.3 19.7 14.2 24.0 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 21 28 31 31 22 0 0 0 133 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 13.8 15.8 25.8 28.0 34.2 38.5 38.4 37.4 35.8 29.4 23.4 20.0 38.5 DAY 7 17 13 15 24 30 2 21 1 1 11 7 DIF. BETWEEN (MAX.-MIN.) (C) 12.2 13.0 17.3 16.6 18.7 19.2 14.8 17.2 19.1 18.8 19.1 18.2 17.0 MEAN DAILY TEMP. (MDT) (C) 3.0 5.2 9.5 14.0 21.2 24.6 27.4 26.9 22.7 15.9 10.1 5.1 15.5 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 27.0 113.1 198.0 182.8 67.6 0.0 0.0 0.0 588.5 HEATING DEG. DAYS(BASE 18 0C) 466.3 358.2 264.4 121.2 3.5 0.0 0.0 0.0 0.0 75.2 235.5 400.6 1924.9 DEWPOINT (MEAN C) -6.8 -5.5 -5.5 -1.5 2.9 2.6 6.1 6.8 3.2 1.2 -1.9 -6.6 -0.4 MIXING RATIO (G/KG) 3.03 3.40 3.32 4.42 6.07 5.76 7.50 7.85 6.24 5.36 4.27 3.00 5.02 VAPOUR PRESSURE (HPA) 3.95 4.42 4.33 5.74 7.84 7.44 9.63 10.11 8.07 6.98 5.57 3.91 6.50 SATURATION DEF. (HPA) 4.81 6.07 11.00 15.00 25.99 35.19 34.73 34.31 28.58 16.65 10.77 7.80 19.24 RELATIVE HUMIDITY (MEAN %) 49 46 33 33 25 19 23 24 23 32 38 38 32 RELATIVE HUMIDITY (MAX. %) 75 73 59 62 43 26 31 33 34 50 57 59 50 RELATIVE HUMIDITY (MIN. %) 32 29 20 20 17 15 18 19 17 22 26 25 22 RELATIVE HUMIDITY (MEAN% 03UTC) 73 70 58 60 39 26 30 33 33 49 53 58 49 RELATIVE HUMIDITY (MEAN% 09UTC) 41 38 26 26 20 17 21 21 20 25 33 30 27 RELATIVE HUMIDITY (MEAN% 15UTC) 40 35 25 25 21 16 20 20 20 30 37 36 27 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 40.5 32.5 8.0 22.0 0.0 0.0 3.0 0.0 0.0 0.0 1.0 1.0 108.0 DAYS WITH PRECIPITATION >=10 1 2 0 1 0 0 0 0 0 0 0 0 4 DAYS WITH PRECIPITATION >= 5 3 2 1 2 0 0 0 0 0 0 0 0 8 DAYS WITH PRECIPITATION >= 1 8 5 2 3 0 0 1 0 0 0 1 1 21 DAYS WITH PRECIPITATION 8 5 2 3 0 0 1 0 0 0 1 1 21 GREATEST DAILY PRECIPITATION 14.0 15.0 7.0 12.0 0.0 0.0 3.0 0.0 0.0 0.0 1.0 1.0 15.0 DAY 28 6 18 4 ** ** 14 ** ** ** 29 22 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 0 0 0 0 0 DAYS WITH SNOW OR SLEET 3 0 0 0 0 0 0 0 0 0 0 0 3 DAYS WITH DUST 0 3 3 4 1 2 0 1 0 0 0 3 17 WIND DIRECTION (PREVAILING) 270 270 270 270 270 360 360 360 360 180 270 270 270 PREVAILING WIND SPEED(KNOTS) 13.0 14.9 14.9 15.3 8.9 15.0 13.9 14.1 10.5 7.4 7.5 12.0 12.1 PREVAILING WIND PERCENT 20.0 22.9 23.9 39.3 27.6 25.3 35.5 22.6 19.3 16.1 10.7 25.2 18.4 CALMS PERCENT OF WIND 26.5 27.1 19.4 20.7 24.4 28.7 14.8 23.9 38.0 39.4 60.7 38.7 30.1 NO. OF WIND OBSERVATION 155 140 155 150 156 150 155 155 150 155 150 155 1826 VECTOR WIND DIRECTION (MEAN) 218 226 255 254 249 331 5 32 324 222 216 242 259 VECTOR WIND MAGNITUDE(KNOTS) 3.3 4.4 3.9 7.1 2.8 3.6 3.5 1.3 1.3 1.8 1.0 4.1 2.2 WIND STEADINESES (MEAN %) 40.2 49.4 41.1 74.7 37.3 43.9 38.0 16.5 24.5 36.0 33.3 65.1 29.7 WIND SPEED (MEAN KNOTS) 8.2 8.9 9.5 9.5 7.5 8.2 9.2 7.9 5.3 5.0 3.0 6.3 7.4 FASTEST WIND DIRECTION 220 190 360 270 220 20 360 360 360 300 130 260 270 FASTEST WIND SPEED (KNOTS) 39 31 43 51 27 31 31 31 19 16 10 39 51 DAY 10 15 3 16 13 23 9 4 23 15 11 25 DAYS WITH SKY CLEAR (0-2)/8 11 16 23 15 26 29 26 24 28 30 26 21 275 DAYS WITH P.CLOUDY (3-6)/8 15 7 6 13 5 1 5 7 2 1 3 9 74 DAYS WITH CLOUDY (7-8)/8 5 5 2 2 0 0 0 0 0 0 1 1 16 DAYS WITH VISIBILITY =< 2 KM 1 0 0 1 0 0 0 0 0 0 0 0 2 DURATION OF SUNSHINE HOURS 210.0 222.2 284.5 276.0 370.1 368.6 340.3 329.4 329.2 317.8 ****** ****** ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.8 812.5 815.3 813.6 813.3 811.3 809.5 811.4 813.7 817.8 818.5 816.4 814.0 MAX. QFE PRESSURE IN HPA 821.3 818.7 822.8 819.0 817.5 816.1 814.9 815.4 818.5 823.6 824.5 824.0 824.5 DAY-HOUR 26- 6 8- 6 10- 6 3- 9 18- 6 4- 6 15- 6 4- 6 26- 6 19- 6 23- 6 5- 6 MIN. QFE PRESSURE IN HPA 808.4 806.0 808.2 807.7 807.7 806.1 803.3 808.4 809.1 811.7 811.1 809.8 803.3 DAY-HOUR 17-12 24-12 27-12 6-12 12-15 26-15 5-15 7-15 3-15 1-12 1-12 25-12 MEAN QNH PRESSURE IN HPA 1017.0 1014.2 1017.6 1015.6 1015.1 1012.8 1010.6 1012.9 1015.6 1020.6 1021.4 1018.9 1016.0 MAX. QNH PRESSURE IN HPA 1024.8 1021.6 1026.5 1022.0 1020.2 1018.5 1017.1 1017.7 1021.4 1027.5 1028.6 1028.0 1028.6 DAY-HOUR 26- 6 8- 6 10- 6 3- 9 18- 6 4- 6 15- 6 4- 6 26- 6 19- 6 23- 6 5- 6 MIN. QNH PRESSURE IN HPA 1009.3 1006.4 1009.1 1008.5 1008.5 1006.6 1003.2 1009.3 1010.2 1013.3 1012.5 1011.0 1003.2 DAY-HOUR 17-12 24-12 27-12 6-12 12-15 26-15 5-15 7-15 3-15 1-12 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 814.9 812.8 815.8 814.0 814.0 812.2 810.4 812.3 814.5 818.6 819.0 817.0 814.6 MAX. QFE PRESSURE IN HPA 819.4 817.6 821.3 817.2 816.8 815.4 814.4 815.1 817.9 822.5 823.5 822.8 823.5 DAY 20 1 10 24 18 5 15 4 26 19 23 5 MIN. QFE PRESSURE IN HPA 811.0 806.8 811.0 809.1 807.8 808.8 805.4 809.8 811.2 814.6 813.4 810.3 805.4 DAY 17 16 3 10 13 27 5 1 4 1 1 26 MEAN QNH PRESSURE IN HPA 1017.1 1014.5 1018.1 1016.0 1016.0 1013.8 1011.7 1014.0 1016.6 1021.5 1022.0 1019.6 1016.7 MAX. QNH PRESSURE IN HPA 1022.5 1020.3 1024.8 1019.8 1019.4 1017.7 1016.5 1017.3 1020.7 1026.2 1027.4 1026.5 1027.4 DAY 20 1 10 24 18 5 15 4 26 19 23 5 MIN. QNH PRESSURE IN HPA 1012.4 1007.4 1012.4 1010.2 1008.6 1009.8 1005.7 1011.0 1012.7 1016.7 1015.3 1011.6 1005.7 DAY 17 16 3 10 13 27 5 1 4 1 1 26 MEAN QFF PRESSURE IN HPA 1018.1 1013.4 1014.1 1007.7 1001.5 996.6 993.0 996.0 1002.3 1012.8 1018.2 1019.5 1007.8 MAX. QFF PRESSURE IN HPA 1028.1 1022.5 1022.8 1013.8 1006.3 1003.3 999.0 1000.9 1009.3 1020.9 1026.3 1034.3 1034.3 DAY 31 1 22 4 16 2 15 16 28 19 23 29 MIN. QFF PRESSURE IN HPA 1010.6 1003.8 1007.8 1001.1 993.6 989.6 985.3 992.2 995.2 1003.9 1009.8 1006.8 985.3 DAY 15 16 25 16 13 30 5 1 4 1 1 26 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 816.2 813.9 816.9 815.0 814.7 812.7 810.8 812.8 815.2 819.5 820.0 817.9 815.5 MAX. QFE PRESSURE IN HPA 821.3 818.7 822.8 818.2 817.5 816.1 814.9 815.4 818.5 823.6 824.5 824.0 824.5 DAY 26 8 10 27 18 4 15 4 26 19 23 5 MIN. QFE PRESSURE IN HPA 811.5 807.2 811.6 810.6 808.8 809.3 806.1 810.0 812.0 815.2 814.0 811.9 806.1 DAY 17 16 27 10 13 27 5 1 4 1 1 26 MEAN QNH PRESSURE IN HPA 1018.6 1015.9 1019.4 1017.2 1016.8 1014.4 1012.2 1014.6 1017.5 1022.6 1023.2 1020.7 1017.8 MAX. QNH PRESSURE IN HPA 1024.8 1021.6 1026.5 1021.0 1020.2 1018.5 1017.1 1017.7 1021.4 1027.5 1028.6 1028.0 1028.6 DAY 26 8 10 27 18 4 15 4 26 19 23 5 MIN. QNH PRESSURE IN HPA 1013.0 1007.9 1013.1 1011.9 1009.8 1010.4 1006.6 1011.2 1013.6 1017.5 1016.0 1013.5 1006.6 DAY 17 16 27 10 13 27 5 1 4 1 1 26 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 814.9 812.8 815.7 814.0 813.6 811.7 809.7 811.6 813.9 817.9 818.5 816.5 814.2 MAX. QFE PRESSURE IN HPA 820.6 817.5 821.7 819.0 816.7 815.3 813.9 814.1 817.1 822.1 823.1 822.4 823.1 DAY 26 1 10 3 18 4 15 4 27 19 23 5 MIN. QFE PRESSURE IN HPA 809.8 807.4 810.7 809.4 807.7 808.2 805.4 809.4 810.9 813.7 812.7 811.8 805.4 DAY 16 16 27 16 13 30 5 1 4 1 1 25 MEAN QNH PRESSURE IN HPA 1017.1 1014.6 1018.1 1016.0 1015.5 1013.2 1010.9 1013.2 1015.9 1020.7 1021.5 1019.1 1016.3 MAX. QNH PRESSURE IN HPA 1023.9 1020.2 1025.2 1022.0 1019.2 1017.6 1015.9 1016.1 1019.7 1025.7 1026.9 1026.1 1026.9 DAY 26 1 10 3 18 4 15 4 27 19 23 5 MIN. QNH PRESSURE IN HPA 1011.0 1008.1 1012.1 1010.5 1008.5 1009.1 1005.7 1010.5 1012.3 1015.7 1014.5 1013.4 1005.7 DAY 16 16 27 16 13 30 5 1 4 1 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 813.7 811.1 813.9 812.5 812.0 810.2 808.4 810.1 812.3 816.4 817.2 815.1 812.7 MAX. QFE PRESSURE IN HPA 819.5 815.9 819.3 816.9 814.8 814.2 812.6 812.7 816.0 820.7 821.6 821.0 821.6 DAY 26 8 10 3 17 4 15 4 26 19 23 5 MIN. QFE PRESSURE IN HPA 808.4 806.0 808.2 807.7 807.9 806.6 803.8 808.4 809.5 811.7 811.1 809.8 803.8 DAY 17 24 27 6 12 30 5 25 4 1 1 25 MEAN QNH PRESSURE IN HPA 1015.6 1012.6 1015.9 1014.3 1013.7 1011.4 1009.3 1011.4 1014.0 1018.9 1019.8 1017.3 1014.5 MAX. QNH PRESSURE IN HPA 1022.6 1018.3 1022.4 1019.5 1017.0 1016.3 1014.3 1014.5 1018.4 1024.0 1025.1 1024.4 1025.1 DAY 26 8 10 3 17 4 15 4 26 19 23 5 MIN. QNH PRESSURE IN HPA 1009.3 1006.4 1009.1 1008.5 1008.7 1007.2 1003.8 1009.3 1010.6 1013.3 1012.5 1011.0 1003.8 DAY 17 24 27 6 12 30 5 25 4 1 1 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.4 811.7 814.4 812.8 812.1 810.0 808.4 810.2 812.5 816.8 817.9 815.7 813.1 MAX. QFE PRESSURE IN HPA 820.1 816.4 819.8 817.0 815.0 814.3 812.3 813.2 816.3 821.3 822.3 821.3 822.3 DAY 26 3 10 3 17 4 15 4 27 19 23 5 MIN. QFE PRESSURE IN HPA 809.5 806.5 808.5 808.1 807.7 806.1 803.3 808.4 809.1 812.5 812.1 810.5 803.3 DAY 17 23 27 6 12 26 5 7 3 1 1 25 MEAN QNH PRESSURE IN HPA 1016.4 1013.3 1016.5 1014.6 1013.7 1011.2 1009.3 1011.4 1014.2 1019.3 1020.6 1018.1 1014.9 MAX. QNH PRESSURE IN HPA 1023.3 1018.9 1023.0 1019.6 1017.2 1016.4 1014.0 1015.1 1018.8 1024.8 1025.9 1024.8 1025.9 DAY 26 3 10 3 17 4 15 4 27 19 23 5 MIN. QNH PRESSURE IN HPA 1010.6 1007.0 1009.4 1008.9 1008.5 1006.6 1003.2 1009.3 1010.2 1014.2 1013.7 1011.8 1003.2 DAY 17 23 27 6 12 26 5 7 3 1 1 25 MEAN QFF PRESSURE IN HPA 1017.5 1012.0 1012.3 1006.3 999.1 993.6 990.5 993.3 999.6 1010.4 1016.7 1017.8 1005.8 MAX. QFF PRESSURE IN HPA 1029.4 1019.6 1020.0 1015.9 1003.5 1001.3 996.9 997.6 1007.0 1019.5 1024.9 1029.9 1029.9 DAY 26 8 10 3 16 4 14 15 25 19 23 28 MIN. QFF PRESSURE IN HPA 1010.4 1003.4 1003.9 999.5 992.8 986.0 983.0 990.2 992.1 1001.5 1008.0 1009.4 983.0 DAY 15 23 25 15 28 30 5 7 3 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 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1991 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 5.9 6.5 11.2 18.1 23.1 28.6 31.3 27.1 22.2 15.7 9.3 6.4 17.1 MINIMUN AIR TEMPERATURE (C) -1.8 -1.9 3.6 7.5 9.1 14.9 19.1 16.8 11.3 6.8 0.8 1.3 7.3 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 1 8 2 0 0 0 0 11 DAYS WITH MINIMUM TEMP. <=-4 11 10 0 0 0 0 0 0 0 0 1 7 29 DAYS WITH FREEZING MIN.<= 0 19 19 8 0 0 0 0 0 0 0 11 12 69 TEMPERATURE RECORDS LOWEST(C) -14.6 -12.6 -3.6 0.6 2.0 9.8 14.4 8.6 4.6 2.4 -4.6 -7.4 -14.6 DAY 7 16 8 12 24 13 29 26 29 31 17 30 MAXIMUM AIR TEMPERATURE (C) 10.6 11.6 16.1 23.4 28.5 33.7 36.8 34.9 31.1 24.1 17.9 12.3 23.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 9 27 30 31 22 0 0 0 119 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 1 1 TEMPERATURE RECORDS HIGHEST(C) 16.0 17.4 22.8 29.0 33.6 36.4 40.0 37.6 37.4 26.5 23.0 18.4 40.0 DAY 21 27 22 27 31 4 11 11 9 10 1 9 DIF. BETWEEN (MAX.-MIN.) (C) 12.4 13.5 12.5 15.9 19.4 18.8 17.7 18.1 19.8 17.3 17.1 11.0 16.1 MEAN DAILY TEMP. (MDT) (C) 4.4 4.9 9.8 15.4 18.8 24.3 28.0 25.9 21.2 15.4 9.4 6.8 15.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 2.1 11.0 99.7 207.3 151.3 36.2 0.0 0.0 0.0 507.6 HEATING DEG. DAYS(BASE 18 0C) 422.2 367.5 253.3 89.6 23.2 0.0 0.0 0.0 11.2 79.3 259.4 346.4 1852.0 DEWPOINT (MEAN C) -3.4 -5.4 0.1 1.3 0.8 3.1 5.5 1.8 -5.1 -0.3 -2.6 -0.3 -0.4 MIXING RATIO (G/KG) 4.11 3.47 5.07 5.38 5.15 6.07 7.27 5.86 3.49 4.79 3.98 4.87 4.96 VAPOUR PRESSURE (HPA) 5.34 4.51 6.57 6.99 6.66 7.84 9.34 7.55 4.54 6.25 5.20 6.34 6.43 SATURATION DEF. (HPA) 4.43 5.78 7.42 15.18 23.09 32.91 38.16 30.17 24.38 12.70 7.47 3.85 17.13 RELATIVE HUMIDITY (MEAN %) 56 47 51 37 25 21 22 22 18 37 47 67 38 RELATIVE HUMIDITY (MAX. %) 75 74 80 62 41 30 34 34 32 57 68 88 56 RELATIVE HUMIDITY (MIN. %) 41 30 33 23 17 16 14 13 10 22 29 43 24 RELATIVE HUMIDITY (MEAN% 03UTC) 73 74 79 62 41 30 34 32 29 53 66 84 55 RELATIVE HUMIDITY (MEAN% 09UTC) 48 37 42 29 20 17 18 15 13 27 35 50 29 RELATIVE HUMIDITY (MEAN% 15UTC) 52 41 43 27 19 18 17 16 13 28 37 58 31 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 50.8 18.4 33.0 8.0 0.0 0.0 0.0 0.0 0.0 8.0 14.0 21.3 153.5 DAYS WITH PRECIPITATION >=10 1 0 0 0 0 0 0 0 0 0 1 0 2 DAYS WITH PRECIPITATION >= 5 5 1 3 0 0 0 0 0 0 1 1 1 12 DAYS WITH PRECIPITATION >= 1 9 5 9 3 0 0 0 0 0 1 1 7 35 DAYS WITH PRECIPITATION 9 6 9 3 0 0 0 0 0 1 1 10 39 GREATEST DAILY PRECIPITATION 10.0 9.0 8.0 4.0 0.0 0.0 0.0 0.0 0.0 8.0 14.0 7.0 14.0 DAY 15 22 28 1 ** ** ** ** ** 16 24 19 DAY WITH THUNDER STORM 0 0 2 0 0 0 0 0 0 1 0 1 4 DAYS WITH SNOW OR SLEET 0 0 0 0 0 0 0 0 0 0 0 2 2 DAYS WITH DUST 0 0 2 2 5 1 1 2 3 4 0 3 23 WIND DIRECTION (PREVAILING) 225 180 180 270 270 360 360 360 360 360 180 180 180 PREVAILING WIND SPEED(KNOTS) 14.0 10.0 11.2 13.4 13.2 14.5 17.3 13.8 13.9 11.7 8.1 10.5 9.1 PREVAILING WIND PERCENT 18.1 24.3 26.5 26.7 30.3 20.7 20.6 34.3 29.2 13.7 10.8 22.6 13.8 CALMS PERCENT OF WIND 36.1 18.6 14.2 19.3 21.3 30.7 23.9 28.6 37.1 50.0 65.4 42.7 34.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 248 240 248 240 248 2284 VECTOR WIND DIRECTION (MEAN) 212 215 230 244 263 323 359 12 355 326 188 190 257 VECTOR WIND MAGNITUDE(KNOTS) 3.4 5.6 4.9 4.6 6.1 1.8 1.5 4.9 4.0 1.6 0.8 3.6 1.8 WIND STEADINESES (MEAN %) 50.7 59.6 47.6 50.5 65.6 25.4 18.3 64.5 59.7 36.4 29.6 59.0 24.7 WIND SPEED (MEAN KNOTS) 6.7 9.4 10.3 9.1 9.3 7.1 8.2 7.6 6.7 4.4 2.7 6.1 7.3 FASTEST WIND DIRECTION 240 250 220 280 230 360 360 360 360 360 180 210 230 FASTEST WIND SPEED (KNOTS) 35 49 39 31 54 35 39 33 43 39 16 39 54 DAY 24 1 15 1 23 18 22 23 26 4 4 15 DAYS WITH SKY CLEAR (0-2)/8 13 8 11 18 23 26 31 31 29 23 25 10 248 DAYS WITH P.CLOUDY (3-6)/8 11 15 10 11 8 4 0 0 1 7 4 15 86 DAYS WITH CLOUDY (7-8)/8 7 5 10 1 0 0 0 0 0 1 1 6 31 DAYS WITH VISIBILITY =< 2 KM 1 0 0 0 2 0 0 0 0 1 0 1 5 DURATION OF SUNSHINE HOURS ****** ****** 197.9 270.7 324.5 343.6 354.0 349.0 306.2 264.8 268.6 156.3 ****** ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 815.0 814.5 813.1 814.7 812.1 811.2 809.2 810.8 815.0 817.7 818.0 815.8 813.9 MAX. QFE PRESSURE IN HPA 821.2 822.7 818.4 819.6 816.7 816.0 814.0 815.0 818.6 821.7 822.3 823.2 823.2 DAY-HOUR 12- 6 15- 6 29- 6 18- 6 9- 6 23- 6 1- 3 31-18 17- 6 20- 6 14- 6 7- 6 MIN. QFE PRESSURE IN HPA 806.5 807.3 807.5 808.8 808.0 805.8 803.5 806.3 809.6 814.1 812.7 808.9 803.5 DAY-HOUR 25-12 8-12 7- 9 12-15 28-15 12-12 14-12 11-15 3-12 15-12 8-12 22-12 MEAN QNH PRESSURE IN HPA 1017.2 1016.6 1014.9 1016.8 1013.7 1012.7 1010.2 1012.2 1017.2 1020.4 1020.8 1018.1 1015.9 MAX. QNH PRESSURE IN HPA 1024.6 1026.4 1021.3 1022.7 1019.2 1018.4 1016.0 1017.2 1021.5 1025.2 1025.9 1027.0 1027.0 DAY-HOUR 12- 6 15- 6 29- 6 18- 6 9- 6 23- 6 1- 3 31-18 17- 6 20- 6 14- 6 7- 6 MIN. QNH PRESSURE IN HPA 1007.0 1008.0 1008.2 1009.8 1008.8 1006.2 1003.4 1006.8 1010.7 1016.1 1014.5 1009.9 1003.4 DAY-HOUR 25-12 8-12 7- 9 12-15 28-15 12-12 14-12 11-15 3-12 15-12 8-12 22-12 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 993.9 1002.6 1010.4 1015.7 1015.0 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1001.9 1015.0 1017.5 1023.8 1024.0 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 31- 3 28- 3 28- 3 17- 3 24- 3 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 986.8 995.4 1005.4 1007.0 1004.8 ****** DAY-HOUR **-** **-** **-** **-** **-** **-** **-** 12-12 3- 9 9-18 6-12 26- 0 PRESSURE AT HOUR 0000 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 810.7 814.8 817.5 817.9 815.6 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 813.0 817.5 820.2 820.6 821.4 ****** DAY ** ** ** ** ** ** ** 31 28 28 14 8 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.1 811.5 815.2 814.0 809.4 ****** DAY ** ** ** ** ** ** ** 12 4 9 7 26 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1012.1 1016.9 1020.2 1020.7 1018.0 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1014.8 1020.2 1023.4 1023.9 1024.9 ****** DAY ** ** ** ** ** ** ** 31 28 28 14 8 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.9 1013.0 1017.5 1016.0 1010.5 ****** DAY ** ** ** ** ** ** ** 12 4 9 7 26 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 993.6 1002.2 1009.8 1015.0 1014.3 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.1 1011.2 1013.2 1020.3 1022.0 ****** DAY ** ** ** ** ** ** ** 28 28 28 25 8 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 988.0 996.8 1006.3 1007.9 1004.8 ****** DAY ** ** ** ** ** ** ** 12 10 8 7 26 PRESSURE AT HOUR 0300 UTC. MEAN QFE PRESSURE IN HPA 815.2 814.9 813.4 815.2 812.7 812.1 810.3 811.7 815.6 818.2 818.5 816.0 814.5 MAX. QFE PRESSURE IN HPA 819.8 821.6 817.4 819.3 816.0 815.8 814.0 814.4 818.4 820.8 821.3 821.2 821.6 DAY 13 16 18 19 9 23 1 31 28 20 14 7 MIN. QFE PRESSURE IN HPA 806.7 808.5 808.1 811.1 808.6 808.0 806.1 809.5 812.1 816.0 814.4 811.6 806.1 DAY 26 8 7 12 23 12 14 12 4 4 8 22 MEAN QNH PRESSURE IN HPA 1017.5 1017.1 1015.3 1017.5 1014.5 1013.7 1011.6 1013.2 1018.0 1021.1 1021.5 1018.4 1016.6 MAX. QNH PRESSURE IN HPA 1023.0 1025.1 1020.1 1022.4 1018.4 1018.2 1016.0 1016.5 1021.3 1024.2 1024.8 1024.6 1025.1 DAY 13 16 18 19 9 23 1 31 28 20 14 7 MIN. QNH PRESSURE IN HPA 1007.3 1009.4 1008.9 1012.5 1009.5 1008.8 1006.6 1010.6 1013.7 1018.4 1016.5 1013.1 1006.6 DAY 26 8 7 12 23 12 14 12 4 4 8 22 MEAN QFF PRESSURE IN HPA 1017.1 1016.3 1010.3 1008.1 1001.5 996.9 992.6 996.4 1004.9 1012.8 1018.0 1016.3 1007.6 MAX. QFF PRESSURE IN HPA 1029.7 1031.6 1019.5 1014.5 1007.4 1002.8 998.8 1001.9 1015.0 1017.5 1023.8 1024.0 1031.6 DAY 7 15 18 2 9 23 1 31 28 28 17 24 MIN. QFF PRESSURE IN HPA 1004.6 1006.4 1003.9 1002.0 996.4 991.0 986.1 991.5 998.8 1008.4 1011.6 1010.7 986.1 DAY 26 8 7 28 23 12 15 12 8 4 6 2 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 816.3 815.9 814.4 816.1 813.3 812.5 810.6 812.2 816.5 819.4 819.6 817.1 815.3 MAX. QFE PRESSURE IN HPA 821.2 822.7 818.4 819.6 816.7 816.0 814.0 814.6 818.6 821.7 822.3 823.2 823.2 DAY 12 15 29 18 9 23 1 23 17 20 14 7 MIN. QFE PRESSURE IN HPA 808.9 809.3 808.3 812.2 809.7 808.6 806.5 809.8 813.0 816.7 815.7 811.6 806.5 DAY 26 8 7 12 23 12 14 12 3 15 8 22 MEAN QNH PRESSURE IN HPA 1018.8 1018.3 1016.5 1018.6 1015.2 1014.2 1011.9 1013.9 1019.0 1022.4 1022.7 1019.7 1017.6 MAX. QNH PRESSURE IN HPA 1024.6 1026.4 1021.3 1022.7 1019.2 1018.4 1016.0 1016.7 1021.5 1025.2 1025.9 1027.0 1027.0 DAY 12 15 29 18 9 23 1 23 17 20 14 7 MIN. QNH PRESSURE IN HPA 1009.9 1010.4 1009.2 1013.9 1010.9 1009.5 1007.0 1011.0 1014.8 1019.2 1018.1 1013.1 1007.0 DAY 26 8 7 12 23 12 14 12 3 15 8 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 995.2 1004.0 1011.9 1017.3 1016.9 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1000.6 1011.8 1015.5 1021.4 1023.4 ****** DAY ** ** ** ** ** ** ** 24 28 28 17 24 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 990.5 998.1 1008.8 1010.4 1011.1 ****** DAY ** ** ** ** ** ** ** 12 8 10 6 22 PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 815.2 814.8 813.5 815.2 812.4 811.5 809.5 811.2 815.3 818.1 818.3 815.8 814.2 MAX. QFE PRESSURE IN HPA 819.8 822.7 817.8 819.0 815.4 815.0 812.7 814.0 818.0 820.6 821.0 822.4 822.7 DAY 12 15 18 18 9 23 1 31 28 20 13 7 MIN. QFE PRESSURE IN HPA 807.7 808.3 807.5 811.1 809.3 807.5 805.5 808.6 811.3 815.6 814.2 810.0 805.5 DAY 26 8 7 11 23 12 14 12 3 15 8 22 MEAN QNH PRESSURE IN HPA 1017.4 1017.0 1015.4 1017.4 1014.1 1013.0 1010.6 1012.7 1017.6 1020.9 1021.2 1018.2 1016.3 MAX. QNH PRESSURE IN HPA 1023.0 1026.4 1020.6 1022.0 1017.7 1017.2 1014.5 1016.0 1020.8 1023.9 1024.4 1026.1 1026.4 DAY 12 15 18 18 9 23 1 31 28 20 13 7 MIN. QNH PRESSURE IN HPA 1008.5 1009.2 1008.2 1012.5 1010.4 1008.2 1005.8 1009.5 1012.8 1017.9 1016.3 1011.2 1005.8 DAY 26 8 7 11 23 12 14 12 3 15 8 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 993.6 1002.1 1009.9 1015.3 1014.4 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 998.9 1010.5 1013.0 1020.4 1021.6 ****** DAY ** ** ** ** ** ** ** 31 28 31 24 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 989.1 995.4 1006.8 1009.2 1006.9 ****** DAY ** ** ** ** ** ** ** 12 3 4 8 22 PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 813.9 813.2 811.9 813.4 811.0 810.0 807.9 809.6 813.7 816.6 816.8 814.5 812.7 MAX. QFE PRESSURE IN HPA 819.0 821.2 817.0 817.4 814.2 814.0 811.6 812.6 816.7 818.9 819.6 822.0 822.0 DAY 12 15 29 18 25 23 1 31 28 27 13 7 MIN. QFE PRESSURE IN HPA 806.5 807.3 807.8 809.2 808.3 805.8 803.5 806.6 809.6 814.1 812.7 808.9 803.5 DAY 25 8 7 12 28 12 14 12 3 15 8 22 MEAN QNH PRESSURE IN HPA 1015.9 1015.0 1013.5 1015.3 1012.4 1011.3 1008.7 1010.7 1015.6 1019.1 1019.4 1016.6 1014.5 MAX. QNH PRESSURE IN HPA 1022.0 1024.6 1019.6 1020.1 1016.3 1016.0 1013.1 1014.3 1019.2 1021.9 1022.7 1025.6 1025.6 DAY 12 15 29 18 25 23 1 31 28 27 13 7 MIN. QNH PRESSURE IN HPA 1007.0 1008.0 1008.6 1010.3 1009.2 1006.2 1003.4 1007.2 1010.7 1016.1 1014.5 1009.9 1003.4 DAY 25 8 7 12 28 12 14 12 3 15 8 22 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 992.3 1000.9 1008.6 1013.6 1012.8 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 997.2 1009.8 1011.5 1017.8 1021.4 ****** DAY ** ** ** ** ** ** ** 30 28 31 17 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 986.8 995.4 1005.4 1007.0 1006.4 ****** DAY ** ** ** ** ** ** ** 12 8 9 6 1 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 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 814.6 813.7 812.3 813.5 810.9 810.0 807.7 809.6 813.9 816.8 817.2 815.2 813.0 MAX. QFE PRESSURE IN HPA 820.0 821.6 817.2 817.4 814.4 814.1 811.4 813.0 816.7 819.3 820.1 822.0 822.0 DAY 12 15 29 18 8 22 1 31 28 20 13 7 MIN. QFE PRESSURE IN HPA 807.9 808.2 808.6 808.8 808.0 806.0 803.5 806.3 810.0 814.4 813.0 810.2 803.5 DAY 26 8 7 12 28 11 14 11 3 9 8 22 MEAN QNH PRESSURE IN HPA 1016.7 1015.7 1014.0 1015.4 1012.4 1011.2 1008.5 1010.8 1015.9 1019.4 1019.9 1017.5 1014.8 MAX. QNH PRESSURE IN HPA 1023.2 1025.1 1019.8 1020.1 1016.5 1016.1 1012.9 1014.8 1019.2 1022.4 1023.3 1025.6 1025.6 DAY 12 15 29 18 8 22 1 31 28 20 13 7 MIN. QNH PRESSURE IN HPA 1008.7 1009.1 1009.5 1009.8 1008.8 1006.4 1003.4 1006.8 1011.2 1016.5 1014.8 1011.5 1003.4 DAY 26 8 7 12 28 11 14 11 3 9 8 22 MEAN QFF PRESSURE IN HPA 1016.2 1014.9 1009.1 1005.9 999.2 994.1 989.4 993.8 1002.9 1010.9 1016.4 1015.4 1005.7 MAX. QFF PRESSURE IN HPA 1027.4 1030.5 1017.2 1011.4 1005.6 1001.1 995.1 1000.2 1012.1 1015.2 1021.2 1021.7 1030.5 DAY 12 15 17 2 25 23 1 31 28 27 13 7 MIN. QFF PRESSURE IN HPA 1005.8 1006.6 1002.9 997.8 994.0 987.8 983.3 988.0 995.8 1006.7 1009.8 1008.8 983.3 DAY 24 28 6 28 28 11 14 11 8 4 6 1 PRESSURE AT HOUR 1800 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 810.7 815.0 817.7 818.0 816.1 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 815.0 817.6 820.3 820.7 822.4 ****** DAY ** ** ** ** ** ** ** 31 30 16 24 7 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 807.4 811.4 815.5 813.8 810.4 ****** DAY ** ** ** ** ** ** ** 11 3 8 8 25 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1012.1 1017.2 1020.4 1020.8 1018.5 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1017.2 1020.3 1023.6 1024.0 1026.1 ****** DAY ** ** ** ** ** ** ** 31 30 16 24 7 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.1 1012.9 1017.8 1015.8 1011.7 ****** DAY ** ** ** ** ** ** ** 11 3 8 8 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 993.4 1002.3 1010.0 1015.4 1015.7 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1000.6 1011.1 1014.6 1021.4 1022.3 ****** DAY ** ** ** ** ** ** ** 31 28 31 24 23 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 987.1 996.3 1005.4 1008.8 1008.1 ****** DAY ** ** ** ** ** ** ** 11 8 9 5 25 PRESSURE AT HOUR 2100 UTC. MEAN QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 810.9 814.9 817.6 817.9 815.9 ****** MAX. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 814.4 817.7 820.2 820.6 822.0 ****** DAY ** ** ** ** ** ** ** 31 27 27 13 7 MIN. QFE PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 808.1 811.0 815.5 813.8 809.7 ****** DAY ** ** ** ** ** ** ** 11 3 8 8 25 MEAN QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1012.3 1017.2 1020.3 1020.7 1018.3 ****** MAX. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1016.5 1020.4 1023.4 1023.9 1025.6 ****** DAY ** ** ** ** ** ** ** 31 27 27 13 7 MIN. QNH PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 1008.9 1012.4 1017.8 1015.8 1010.9 ****** DAY ** ** ** ** ** ** ** 11 3 8 8 25 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 993.3 1001.8 1009.5 1014.9 1014.6 ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 999.2 1010.8 1013.9 1020.9 1021.9 ****** DAY ** ** ** ** ** ** ** 31 28 31 24 7 MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** 987.4 995.6 1005.4 1008.7 1006.0 ****** DAY ** ** ** ** ** ** ** 11 7 9 8 25 ======================================================================================================================= TEHRAN 2002,MAY M.(S & A) STATION SHAHR BABAK (40849) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 30 6 N LONGITUDE 55 8 E DATA PROCESSING CENTER ELEVATION 1834.1 M MEANS AND EXTREMES FOR THE YEAR 1992 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 0.8 3.7 6.7 12.8 18.2 25.0 27.7 25.8 19.9 14.7 10.0 5.0 14.2 MINIMUN AIR TEMPERATURE (C) -3.9 -3.6 -0.5 5.2 10.1 14.8 17.7 16.8 10.3 4.8 0.9 -0.6 6.0 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 2 2 3 0 0 0 0 7 DAYS WITH MINIMUM TEMP. <=-4 18 15 8 0 0 0 0 0 0 0 3 7 51 DAYS WITH FREEZING MIN.<= 0 24 22 17 1 0 0 0 0 0 1 12 16 93 TEMPERATURE RECORDS LOWEST(C) -17.8 -11.0 -11.0 -0.6 6.0 11.4 13.6 10.4 4.4 0.0 -6.6 -7.6 -17.8 DAY 29 17 13 8 5 1 23 22 11 26 19 7 MAXIMUM AIR TEMPERATURE (C) 6.3 11.6 13.6 20.2 25.2 33.0 34.7 33.2 28.5 24.3 19.2 11.2 21.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 0 2 30 31 29 10 0 0 0 102 DAYS WITH MAXIMUM TEMP. <= 0 1 0 0 0 0 0 0 0 0 0 0 0 1 TEMPERATURE RECORDS HIGHEST(C) 12.2 16.6 19.4 26.6 30.0 36.6 36.6 36.0 31.0 28.4 22.6 16.0 36.6 DAY 20 23 30 14 20 29 3 2 29 3 14 2 DIF. BETWEEN (MAX.-MIN.) (C) 10.2 15.2 14.1 15.0 15.1 18.2 17.0 16.4 18.2 19.5 18.3 11.8 15.7 MEAN DAILY TEMP. (MDT) (C) 1.2 4.0 6.5 12.7 17.7 23.9 26.2 25.0 19.4 14.5 10.1 5.3 13.9 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 1.9 87.8 162.3 123.9 2.2 0.0 0.0 0.0 378.2 HEATING DEG. DAYS(BASE 18 0C) 521.0 406.2 355.0 158.5 43.0 0.0 0.0 0.0 7.2 108.5 238.2 393.4 2231.0 DEWPOINT (MEAN C) -5.0 -9.1 -6.4 -1.1 3.4 1.8 2.7 0.3 -4.9 -5.3 -8.0 -1.8 -2.8 MIXING RATIO (G/KG) 3.48 2.65 3.34 4.62 6.24 5.55 6.01 5.21 3.46 3.26 2.69 4.36 4.24 VAPOUR PRESSURE (HPA) 4.52 3.44 4.34 5.99 8.08 7.17 7.75 6.74 4.50 4.26 3.53 5.67 5.50 SATURATION DEF. (HPA) 2.35 5.23 6.08 9.90 13.93 26.32 30.86 27.91 20.30 14.02 9.85 3.48 14.19 RELATIVE HUMIDITY (MEAN %) 69 45 45 44 43 25 22 21 20 27 31 66 38 RELATIVE HUMIDITY (MAX. %) 88 71 74 75 70 40 33 34 32 41 49 87 58 RELATIVE HUMIDITY (MIN. %) 46 21 23 21 22 13 14 12 11 15 16 42 21 RELATIVE HUMIDITY (MEAN% 03UTC) 83 67 67 68 66 38 31 33 31 41 48 81 55 RELATIVE HUMIDITY (MEAN% 09UTC) 55 28 30 26 28 15 16 13 14 18 19 51 26 RELATIVE HUMIDITY (MEAN% 15UTC) 62 30 30 31 31 17 17 15 15 20 24 58 29 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 58.8 0.0 31.2 14.9 71.5 0.0 0.0 0.0 0.0 0.0 0.0 103.2 279.6 DAYS WITH PRECIPITATION >=10 2 0 1 0 2 0 0 0 0 0 0 3 8 DAYS WITH PRECIPITATION >= 5 2 0 1 2 4 0 0 0 0 0 0 4 13 DAYS WITH PRECIPITATION >= 1 9 0 3 2 5 0 0 0 0 0 0 10 29 DAYS WITH PRECIPITATION 10 0 6 7 5 0 0 0 0 0 0 12 40 GREATEST DAILY PRECIPITATION 22.0 0.0 22.0 8.0 41.0 0.0 0.0 0.0 0.0 0.0 0.0 34.4 41.0 DAY 21 ** 31 27 11