STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.1 7.3 6.7 14.7 17.5 23.8 25.4 26.9 20.5 17.7 13.0 7.5 15.8 MINIMUN AIR TEMPERATURE (C) 3.0 3.1 3.7 8.6 10.8 14.1 17.9 19.0 15.6 10.9 6.3 2.7 9.6 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 3 12 0 0 0 0 15 DAYS WITH MINIMUM TEMP. <=-4 0 0 0 0 0 0 0 0 0 0 0 1 1 DAYS WITH FREEZING MIN.<= 0 9 6 5 2 0 0 0 0 0 0 2 6 30 TEMPERATURE RECORDS LOWEST(C) -3.0 -3.0 -1.0 -2.0 6.0 10.0 13.0 13.0 7.0 4.0 0.0 -4.0 -4.0 DAY 20 13 25 2 2 15 1 9 30 30 16 13 MAXIMUM AIR TEMPERATURE (C) 13.2 11.0 8.9 19.1 21.2 27.8 28.9 30.8 23.9 21.8 17.5 10.7 19.6 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 4 0 6 15 23 3 0 0 0 51 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 23.0 25.0 23.0 32.0 28.0 33.0 35.0 34.0 34.0 27.0 28.0 27.0 35.0 DAY 30 5 4 24 14 25 18 25 14 9 4 5 DIF. BETWEEN (MAX.-MIN.) (C) 10.2 7.9 5.2 10.5 10.4 13.7 11.0 11.8 8.3 10.9 11.2 8.0 10.0 MEAN DAILY TEMP. (MDT) (C) 8.1 7.1 6.3 13.8 16.0 20.9 23.4 24.9 19.7 16.4 11.9 6.7 14.6 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.5 0.0 16.5 75.0 121.5 23.5 0.5 1.5 0.0 240.0 HEATING DEG. DAYS(BASE 18 0C) 306.0 319.0 363.0 136.5 68.0 0.0 0.0 0.0 22.0 60.5 189.5 350.0 1814.5 DEWPOINT (MEAN C) 4.9 4.4 4.7 10.1 14.1 16.9 19.4 20.9 17.7 14.4 8.9 5.1 11.8 MIXING RATIO (G/KG) 5.46 5.23 5.33 7.86 10.10 12.31 14.31 15.69 12.93 10.37 7.25 5.50 9.36 VAPOUR PRESSURE (HPA) 8.87 8.49 8.65 12.64 16.20 19.62 22.68 24.84 20.64 16.68 11.73 8.96 15.00 SATURATION DEF. (HPA) 3.26 2.22 1.50 5.07 4.34 10.64 10.54 11.40 4.48 4.22 4.09 1.95 5.31 RELATIVE HUMIDITY (MEAN %) 80 86 89 78 82 68 72 72 86 83 80 87 80 RELATIVE HUMIDITY (MAX. %) 92 95 96 94 97 93 93 96 99 99 97 98 96 RELATIVE HUMIDITY (MIN. %) 67 73 81 64 71 51 59 58 73 68 63 76 67 RELATIVE HUMIDITY (MEAN% 03UTC) 91 94 96 92 97 90 93 96 99 99 94 96 95 RELATIVE HUMIDITY (MEAN% 09UTC) 71 80 85 69 74 57 64 60 80 71 67 80 72 RELATIVE HUMIDITY (MEAN% 15UTC) 84 87 90 79 80 64 67 71 86 88 89 91 81 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 125.8 109.9 229.4 85.5 69.9 7.1 20.7 25.3 352.5 72.5 46.7 142.3 1287.6 DAYS WITH PRECIPITATION >=10 5 3 8 3 3 0 1 0 11 1 1 6 42 DAYS WITH PRECIPITATION >= 5 5 9 10 7 5 0 1 3 13 5 4 11 73 DAYS WITH PRECIPITATION >= 1 7 15 21 11 9 2 5 5 18 7 4 13 117 DAYS WITH PRECIPITATION 10 20 24 19 13 3 7 8 22 9 7 18 160 GREATEST DAILY PRECIPITATION 52.0 27.0 33.0 21.0 24.0 4.0 13.0 9.0 129.0 35.0 26.0 25.0 129.0 DAY 14 25 24 17 26 12 28 12 4 19 22 6 DAY WITH THUNDER STORM 0 0 0 0 0 0 0 0 3 0 0 0 3 DAYS WITH SNOW OR SLEET 0 2 5 0 0 0 0 0 0 0 0 1 8 DAYS WITH DUST 0 0 0 2 1 1 0 0 0 0 1 0 5 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 360 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 8.6 6.9 8.7 5.5 5.0 3.9 4.9 5.3 8.0 6.9 6.9 8.9 6.9 PREVAILING WIND PERCENT 27.1 49.7 35.5 30.7 24.5 17.3 18.7 23.9 35.3 21.3 26.7 40.6 28.7 CALMS PERCENT OF WIND 2.6 0.0 0.0 0.0 0.0 0.0 0.6 2.6 0.7 0.0 0.0 0.0 0.5 NO. OF WIND OBSERVATION 155 145 155 150 155 150 155 155 150 155 150 155 1830 VECTOR WIND DIRECTION (MEAN) 242 255 277 298 329 20 325 320 284 271 255 249 274 VECTOR WIND MAGNITUDE(KNOTS) 2.9 4.3 3.6 1.3 1.5 1.2 1.1 1.7 3.3 1.9 2.2 4.8 2.1 WIND STEADINESES (MEAN %) 48.3 67.2 58.1 25.5 31.9 27.3 25.6 38.6 53.2 40.4 41.5 68.6 38.9 WIND SPEED (MEAN KNOTS) 6.0 6.4 6.2 5.1 4.7 4.4 4.3 4.4 6.2 4.7 5.3 7.0 5.4 FASTEST WIND DIRECTION 270 200 290 180 270 310 330 330 280 270 330 180 180 FASTEST WIND SPEED (KNOTS) 26 25 28 25 15 13 13 15 23 20 20 30 30 DAY 13 3 13 11 10 26 15 8 26 18 8 5 DAYS WITH SKY CLEAR (0-2)/8 9 1 2 2 7 13 13 14 8 11 8 4 92 DAYS WITH P.CLOUDY (3-6)/8 5 7 2 12 8 13 8 10 4 9 8 8 94 DAYS WITH CLOUDY (7-8)/8 17 21 27 16 16 4 10 7 18 11 14 19 180 DAYS WITH VISIBILITY =< 2 KM 7 7 13 9 11 1 0 1 10 15 6 1 81 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1018.7 1018.6 1018.3 1013.8 1013.8 1011.7 1009.1 1010.4 1015.2 1018.6 1019.0 1023.5 1015.9 MAX. QFE PRESSURE IN HPA 1029.8 1029.7 1028.3 1026.6 1020.3 1021.3 1017.1 1019.6 1030.1 1027.4 1039.4 1036.0 1039.4 DAY-HOUR 22- 3 18- 6 13-12 1- 6 15- 6 11- 6 29- 6 8- 9 26- 6 19- 6 12- 6 19- 6 MIN. QFE PRESSURE IN HPA 998.3 1003.3 1004.8 1001.3 1004.4 998.3 998.3 999.8 1001.7 1009.8 999.1 1000.5 998.3 DAY-HOUR 30-12 7-15 4-12 25-12 2-15 25-15 19-12 3-15 14-12 31-12 8- 9 5- 3 MEAN QNH PRESSURE IN HPA 1017.5 1017.5 1017.2 1012.7 1012.6 1010.6 1007.9 1009.3 1014.0 1017.5 1017.9 1022.4 1014.8 MAX. QNH PRESSURE IN HPA 1028.7 1028.6 1027.2 1025.5 1019.2 1020.2 1016.0 1018.5 1029.0 1026.3 1038.3 1034.9 1038.3 DAY-HOUR 22- 3 18- 6 13-12 1- 6 15- 6 11- 6 29- 6 8- 9 26- 6 19- 6 12- 6 19- 6 MIN. QNH PRESSURE IN HPA 997.2 1002.2 1003.7 1000.2 1003.3 997.2 997.2 998.7 1000.6 1008.7 998.0 999.4 997.2 DAY-HOUR 30-12 7-15 4-12 25-12 2-15 25-15 19-12 3-15 14-12 31-12 8- 9 5- 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 1018.8 1018.7 1018.3 1014.0 1014.3 1012.4 1009.9 1011.1 1015.4 1018.9 1019.4 1023.8 1016.2 MAX. QFE PRESSURE IN HPA 1029.8 1028.7 1027.5 1025.4 1019.7 1020.8 1016.8 1018.7 1027.9 1026.4 1037.7 1035.5 1037.7 DAY 22 18 14 1 15 11 29 8 26 19 12 19 MIN. QFE PRESSURE IN HPA 1001.8 1007.4 1006.7 1002.5 1006.9 1001.4 999.9 1001.2 1002.9 1011.1 1000.5 1000.5 999.9 DAY 30 10 4 26 4 26 19 4 13 15 8 5 MEAN QNH PRESSURE IN HPA 1017.7 1017.6 1017.2 1012.9 1013.2 1011.3 1008.7 1009.9 1014.3 1017.8 1018.3 1022.6 1015.1 MAX. QNH PRESSURE IN HPA 1028.7 1027.6 1026.4 1024.3 1018.6 1019.7 1015.7 1017.6 1026.8 1025.3 1036.6 1034.4 1036.6 DAY 22 18 14 1 15 11 29 8 26 19 12 19 MIN. QNH PRESSURE IN HPA 1000.7 1006.3 1005.6 1001.4 1005.8 1000.3 998.8 1000.1 1001.8 1010.0 999.4 999.4 998.8 DAY 30 10 4 26 4 26 19 4 13 15 8 5 MEAN QFF PRESSURE IN HPA 1017.9 1017.9 1017.4 1013.2 1013.5 1011.6 1009.1 1010.3 1014.6 1018.1 1018.6 1022.9 1015.4 MAX. QFF PRESSURE IN HPA 1028.9 1027.8 1026.6 1024.5 1018.9 1020.0 1016.0 1017.9 1027.1 1025.6 1036.8 1034.6 1036.8 DAY 22 18 14 1 15 11 29 8 26 19 12 19 MIN. QFF PRESSURE IN HPA 1001.0 1006.6 1005.9 1001.7 1006.1 1000.6 999.1 1000.4 1002.1 1010.3 999.7 999.7 999.1 DAY 30 10 4 26 4 26 19 4 13 15 8 5 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1019.9 1019.5 1019.1 1014.7 1014.7 1012.7 1010.1 1011.5 1016.2 1019.7 1020.3 1024.7 1016.9 MAX. QFE PRESSURE IN HPA 1028.8 1029.7 1027.4 1026.6 1020.3 1021.3 1017.1 1019.4 1030.1 1027.4 1039.4 1036.0 1039.4 DAY 22 18 19 1 15 11 29 8 26 19 12 19 MIN. QFE PRESSURE IN HPA 1001.7 1008.8 1007.0 1003.4 1007.9 1003.8 1000.3 1002.1 1003.6 1011.3 1001.0 1000.6 1000.3 DAY 30 10 4 26 4 25 19 4 13 15 7 5 MEAN QNH PRESSURE IN HPA 1018.8 1018.3 1018.0 1013.6 1013.6 1011.5 1009.0 1010.4 1015.1 1018.5 1019.2 1023.6 1015.8 MAX. QNH PRESSURE IN HPA 1027.7 1028.6 1026.3 1025.5 1019.2 1020.2 1016.0 1018.3 1029.0 1026.3 1038.3 1034.9 1038.3 DAY 22 18 19 1 15 11 29 8 26 19 12 19 MIN. QNH PRESSURE IN HPA 1000.6 1007.7 1005.9 1002.3 1006.8 1002.7 999.2 1001.0 1002.5 1010.2 999.9 999.5 999.2 DAY 30 10 4 26 4 25 19 4 13 15 7 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 0900 UTC. MEAN QFE PRESSURE IN HPA 1018.4 1018.7 1018.6 1014.1 1014.0 1012.0 1009.3 1010.7 1015.4 1018.6 1019.0 1023.3 1016.0 MAX. QFE PRESSURE IN HPA 1027.3 1029.0 1027.9 1026.1 1019.7 1020.6 1016.9 1019.6 1029.5 1026.9 1038.4 1034.8 1038.4 DAY 16 26 13 1 21 11 29 8 26 19 12 18 MIN. QFE PRESSURE IN HPA 999.4 1006.3 1005.2 1003.0 1006.6 1002.1 999.0 1001.1 1002.9 1011.1 999.1 1000.7 999.0 DAY 30 10 4 26 2 25 19 25 14 31 8 5 MEAN QNH PRESSURE IN HPA 1017.3 1017.6 1017.4 1013.0 1012.9 1010.8 1008.2 1009.6 1014.3 1017.5 1017.9 1022.2 1014.9 MAX. QNH PRESSURE IN HPA 1026.2 1027.9 1026.8 1025.0 1018.6 1019.5 1015.8 1018.5 1028.4 1025.8 1037.3 1033.7 1037.3 DAY 16 26 13 1 21 11 29 8 26 19 12 18 MIN. QNH PRESSURE IN HPA 998.3 1005.2 1004.1 1001.9 1005.5 1001.0 997.9 1000.0 1001.8 1010.0 998.0 999.6 997.9 DAY 30 10 4 26 2 25 19 25 14 31 8 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1017.7 1017.7 1017.7 1013.2 1013.0 1011.0 1008.1 1009.5 1014.4 1017.7 1017.9 1022.5 1015.0 MAX. QFE PRESSURE IN HPA 1027.5 1029.0 1028.3 1024.0 1019.2 1019.8 1015.8 1018.8 1028.2 1026.6 1036.7 1034.6 1036.7 DAY 16 26 13 1 21 11 29 8 26 19 12 18 MIN. QFE PRESSURE IN HPA 998.3 1004.5 1004.8 1001.3 1005.1 999.8 998.3 1000.0 1001.7 1009.8 999.1 1000.7 998.3 DAY 30 7 4 25 2 25 19 25 14 31 8 5 MEAN QNH PRESSURE IN HPA 1016.6 1016.6 1016.5 1012.0 1011.8 1009.8 1007.0 1008.4 1013.3 1016.6 1016.7 1021.3 1013.9 MAX. QNH PRESSURE IN HPA 1026.4 1027.9 1027.2 1022.9 1018.1 1018.7 1014.7 1017.7 1027.1 1025.5 1035.6 1033.5 1035.6 DAY 16 26 13 1 21 11 29 8 26 19 12 18 MIN. QNH PRESSURE IN HPA 997.2 1003.4 1003.7 1000.2 1004.0 998.7 997.2 998.9 1000.6 1008.7 998.0 999.6 997.2 DAY 30 7 4 25 2 25 19 25 14 31 8 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1956 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1018.6 1018.4 1018.1 1013.3 1012.9 1010.8 1008.0 1009.3 1014.5 1018.1 1018.5 1023.4 1015.3 MAX. QFE PRESSURE IN HPA 1028.5 1029.4 1027.5 1023.7 1019.1 1019.6 1015.4 1018.0 1027.5 1026.6 1036.5 1034.9 1036.5 DAY 16 26 13 15 21 11 29 8 26 19 12 18 MIN. QFE PRESSURE IN HPA 999.6 1003.3 1006.2 1001.4 1004.4 998.3 1000.0 999.8 1002.2 1009.9 1000.5 1003.1 998.3 DAY 30 7 4 25 2 25 18 3 14 10 7 9 MEAN QNH PRESSURE IN HPA 1017.4 1017.3 1017.0 1012.1 1011.8 1009.7 1006.9 1008.1 1013.4 1017.0 1017.4 1022.2 1014.2 MAX. QNH PRESSURE IN HPA 1027.4 1028.3 1026.4 1022.6 1018.0 1018.5 1014.3 1016.9 1026.4 1025.5 1035.4 1033.8 1035.4 DAY 16 26 13 15 21 11 29 8 26 19 12 18 MIN. QNH PRESSURE IN HPA 998.5 1002.2 1005.1 1000.3 1003.3 997.2 998.9 998.7 1001.1 1008.8 999.4 1002.0 997.2 DAY 30 7 4 25 2 25 18 3 14 10 7 9 MEAN QFF PRESSURE IN HPA 1017.7 1017.6 1017.3 1012.4 1012.1 1010.0 1007.2 1008.5 1013.7 1017.3 1017.7 1022.5 1014.5 MAX. QFF PRESSURE IN HPA 1027.6 1028.5 1026.6 1022.9 1018.3 1018.8 1014.6 1017.2 1026.7 1025.8 1035.6 1034.0 1035.6 DAY 16 26 13 15 21 11 29 8 26 19 12 18 MIN. QFF PRESSURE IN HPA 998.8 1002.5 1005.4 1000.6 1003.6 997.5 999.2 999.0 1001.4 1009.1 999.7 1002.3 997.5 DAY 30 7 4 25 2 25 19 3 14 10 7 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 RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 4.7 7.0 9.0 14.7 21.4 22.9 26.0 26.3 25.8 18.1 11.9 9.7 16.5 MINIMUN AIR TEMPERATURE (C) 0.5 2.4 5.0 8.2 14.0 16.1 17.8 18.1 16.5 11.8 6.1 2.4 9.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 1 2 4 7 1 0 0 0 15 DAYS WITH MINIMUM TEMP. <=-4 1 3 1 0 0 0 0 0 0 0 0 0 5 DAYS WITH FREEZING MIN.<= 0 17 5 3 0 0 0 0 0 0 0 5 8 38 TEMPERATURE RECORDS LOWEST(C) -4.0 -5.0 -4.0 1.0 9.0 9.0 12.0 13.0 14.0 6.0 -2.0 -2.0 -5.0 DAY 23 7 30 1 15 8 5 17 3 14 22 24 MAXIMUM AIR TEMPERATURE (C) 7.8 10.2 14.1 19.0 25.6 26.7 29.9 30.7 30.6 23.7 16.7 16.3 20.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 0 3 9 16 22 22 3 0 0 76 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 15.0 17.0 30.0 27.0 32.0 33.0 33.0 36.0 32.0 31.0 23.0 25.0 36.0 DAY 15 24 4 19 9 16 25 2 5 5 2 16 DIF. BETWEEN (MAX.-MIN.) (C) 7.3 7.8 9.1 10.8 11.6 10.6 12.1 12.6 14.1 11.9 10.6 13.9 11.0 MEAN DAILY TEMP. (MDT) (C) 4.2 6.3 9.5 13.6 19.8 21.4 23.8 24.4 23.5 17.7 11.4 9.3 15.4 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 13.0 44.5 88.0 103.5 76.5 8.0 0.0 0.0 333.5 HEATING DEG. DAYS(BASE 18 0C) 428.5 327.0 262.5 132.5 9.0 12.0 0.0 0.0 0.0 43.0 197.5 268.5 1680.5 DEWPOINT (MEAN C) 2.6 5.0 6.6 9.9 15.9 18.1 20.4 21.1 20.4 15.6 10.0 6.5 12.7 MIXING RATIO (G/KG) 4.83 5.46 6.11 7.71 11.47 13.22 15.29 15.98 15.13 11.26 7.90 6.12 10.04 VAPOUR PRESSURE (HPA) 7.84 8.87 9.89 12.44 18.32 21.07 24.22 25.31 24.07 18.12 12.79 9.93 16.07 SATURATION DEF. (HPA) 1.18 1.39 2.25 5.33 7.98 8.09 10.33 10.13 10.15 3.61 1.76 2.81 5.42 RELATIVE HUMIDITY (MEAN %) 88 88 87 75 73 77 73 75 74 87 90 84 81 RELATIVE HUMIDITY (MAX. %) 98 98 99 98 95 97 97 97 98 100 100 99 98 RELATIVE HUMIDITY (MIN. %) 77 78 75 59 58 63 61 63 58 73 79 65 67 RELATIVE HUMIDITY (MEAN% 03UTC) 95 96 98 97 92 97 97 97 98 99 99 99 97 RELATIVE HUMIDITY (MEAN% 09UTC) 83 83 81 64 65 69 64 66 60 78 82 70 72 RELATIVE HUMIDITY (MEAN% 15UTC) 90 88 86 71 74 72 66 72 73 90 95 88 80 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 91.2 74.3 201.6 25.1 55.3 105.7 40.7 108.4 53.2 472.0 437.9 69.2 1734.6 DAYS WITH PRECIPITATION >=10 3 2 8 0 2 4 1 3 1 12 9 2 47 DAYS WITH PRECIPITATION >= 5 8 3 11 1 5 7 2 5 2 13 12 3 72 DAYS WITH PRECIPITATION >= 1 14 6 16 7 9 11 3 7 3 16 14 5 111 DAYS WITH PRECIPITATION 17 11 19 9 14 11 5 7 7 16 17 11 144 GREATEST DAILY PRECIPITATION 14.0 34.3 34.0 8.0 14.0 27.0 30.0 60.0 42.0 99.0 112.0 35.0 112.0 DAY 6 5 26 1 25 4 4 8 21 12 4 21 DAY WITH THUNDER STORM 0 0 0 0 1 0 1 0 2 3 0 0 7 DAYS WITH SNOW OR SLEET 9 2 3 0 0 0 0 0 0 0 1 0 15 DAYS WITH DUST 0 0 0 1 0 0 0 0 0 0 0 0 1 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 90 270 45 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 7.2 5.2 6.9 5.4 4.9 3.2 4.6 3.4 2.9 6.9 5.4 3.5 5.2 PREVAILING WIND PERCENT 43.2 36.4 31.6 22.0 24.5 26.7 24.7 27.5 22.0 33.5 32.7 29.0 27.5 CALMS PERCENT OF WIND 0.0 3.6 5.8 4.7 16.1 19.3 28.0 11.4 27.3 30.3 24.7 25.8 16.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 150 149 150 155 150 155 1814 VECTOR WIND DIRECTION (MEAN) 258 264 295 310 328 330 55 359 30 284 259 267 292 VECTOR WIND MAGNITUDE(KNOTS) 3.7 2.2 2.7 1.6 1.0 0.9 1.5 0.9 1.0 2.1 2.0 0.8 1.2 WIND STEADINESES (MEAN %) 62.7 47.8 49.1 32.0 23.3 33.3 53.6 28.1 41.7 60.0 66.7 32.0 31.6 WIND SPEED (MEAN KNOTS) 5.9 4.6 5.5 5.0 4.3 2.7 2.8 3.2 2.4 3.5 3.0 2.5 3.8 FASTEST WIND DIRECTION 270 270 230 330 270 270 50 310 130 270 270 90 90 FASTEST WIND SPEED (KNOTS) 22 15 18 28 13 10 11 12 12 25 18 30 30 DAY 21 3 17 21 4 5 3 14 21 11 28 28 DAYS WITH SKY CLEAR (0-2)/8 5 4 1 7 4 9 12 18 10 5 6 7 88 DAYS WITH P.CLOUDY (3-6)/8 7 4 8 5 16 8 12 5 17 9 5 12 108 DAYS WITH CLOUDY (7-8)/8 19 20 22 18 11 13 6 8 3 17 19 12 168 DAYS WITH VISIBILITY =< 2 KM 10 11 16 5 3 2 0 2 3 6 4 5 67 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1021.0 1020.5 1018.0 1018.1 1012.2 1014.2 1010.2 1011.5 1014.0 1020.7 1021.4 1020.1 1016.8 MAX. QFE PRESSURE IN HPA 1033.5 1030.9 1033.2 1028.3 1021.2 1023.9 1023.4 1018.4 1019.6 1035.4 1036.2 1034.1 1036.2 DAY-HOUR 4- 6 3- 6 29- 9 5- 6 11- 6 5- 6 5- 6 11-12 10- 3 12-15 23-15 22- 6 MIN. QFE PRESSURE IN HPA 1004.3 1004.7 1002.1 1007.7 1003.5 1005.1 997.8 1004.3 1006.6 1006.4 1010.3 1004.0 997.8 DAY-HOUR 18-15 26-15 17- 9 9-12 8-15 28-15 2-15 7-15 28-12 22-15 28-12 19-12 MEAN QNH PRESSURE IN HPA 1019.8 1019.4 1016.9 1017.0 1011.0 1013.0 1009.0 1010.4 1012.9 1019.5 1020.3 1019.0 1015.7 MAX. QNH PRESSURE IN HPA 1032.4 1029.8 1032.1 1027.2 1020.1 1022.8 1022.3 1017.3 1018.5 1034.3 1035.1 1033.0 1035.1 DAY-HOUR 4- 6 3- 6 29- 9 5- 6 11- 6 5- 6 5- 6 11-12 10- 3 12-15 23-15 22- 6 MIN. QNH PRESSURE IN HPA 1003.2 1003.6 1001.0 1006.6 1002.4 1004.0 996.7 1003.2 1005.5 1005.3 1009.2 1002.9 996.7 DAY-HOUR 18-15 26-15 17- 9 9-12 8-15 28-15 2-15 7-15 28-12 22-15 28-12 19-12 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 1021.4 1020.6 1017.7 1018.3 1012.3 1014.5 1010.8 1012.0 1014.8 1021.1 1021.6 1020.4 1017.1 MAX. QFE PRESSURE IN HPA 1032.4 1030.1 1030.3 1028.0 1020.1 1023.7 1023.1 1017.4 1019.6 1034.4 1033.2 1033.5 1034.4 DAY 4 3 29 5 29 5 5 11 10 12 24 22 MIN. QFE PRESSURE IN HPA 1006.1 1006.4 1003.8 1008.7 1004.8 1006.4 1002.0 1005.4 1008.4 1012.0 1014.1 1006.1 1002.0 DAY 19 27 17 9 26 29 12 7 29 22 14 19 MEAN QNH PRESSURE IN HPA 1020.3 1019.4 1016.6 1017.1 1011.2 1013.3 1009.7 1010.9 1013.7 1020.0 1020.5 1019.3 1016.0 MAX. QNH PRESSURE IN HPA 1031.3 1029.0 1029.2 1026.9 1019.0 1022.6 1022.0 1016.3 1018.5 1033.3 1032.1 1032.4 1033.3 DAY 4 3 29 5 29 5 5 11 10 12 24 22 MIN. QNH PRESSURE IN HPA 1005.0 1005.3 1002.7 1007.6 1003.7 1005.3 1000.9 1004.3 1007.3 1010.9 1013.0 1005.0 1000.9 DAY 19 27 17 9 26 29 12 7 29 22 14 19 MEAN QFF PRESSURE IN HPA 1020.5 1019.7 1016.8 1017.4 1011.5 1013.7 1010.0 1011.2 1014.0 1020.3 1020.8 1019.6 1016.3 MAX. QFF PRESSURE IN HPA 1031.5 1029.2 1029.4 1027.1 1019.3 1022.9 1022.3 1016.6 1018.8 1033.5 1032.3 1032.6 1033.5 DAY 4 3 29 5 29 5 5 11 10 12 24 22 MIN. QFF PRESSURE IN HPA 1005.2 1005.6 1003.0 1007.9 1004.0 1005.6 1001.2 1004.6 1007.6 1011.2 1013.3 1005.3 1001.2 DAY 19 27 17 9 26 29 12 7 29 22 15 19 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1022.2 1021.2 1019.2 1019.0 1012.9 1014.8 1011.0 1012.4 1014.9 1021.2 1022.3 1021.1 1017.7 MAX. QFE PRESSURE IN HPA 1033.5 1030.9 1032.4 1028.3 1021.2 1023.9 1023.4 1018.2 1019.4 1034.6 1035.4 1034.1 1035.4 DAY 4 3 29 5 11 5 5 11 10 12 21 22 MIN. QFE PRESSURE IN HPA 1006.2 1008.3 1003.8 1009.8 1004.8 1006.9 1002.1 1005.9 1008.4 1010.7 1013.8 1006.3 1002.1 DAY 19 26 17 9 8 28 2 7 28 22 14 19 MEAN QNH PRESSURE IN HPA 1021.1 1020.1 1018.0 1017.9 1011.7 1013.7 1009.9 1011.3 1013.8 1020.1 1021.1 1020.0 1016.6 MAX. QNH PRESSURE IN HPA 1032.4 1029.8 1031.3 1027.2 1020.1 1022.8 1022.3 1017.1 1018.3 1033.5 1034.3 1033.0 1034.3 DAY 4 3 29 5 11 5 5 11 10 12 21 22 MIN. QNH PRESSURE IN HPA 1005.1 1007.2 1002.7 1008.7 1003.7 1005.8 1001.0 1004.8 1007.3 1009.6 1012.7 1005.2 1001.0 DAY 19 26 17 9 8 28 2 7 28 22 14 19 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 1020.9 1020.6 1018.4 1018.3 1012.4 1014.5 1010.4 1011.5 1014.0 1020.7 1021.3 1019.9 1016.9 MAX. QFE PRESSURE IN HPA 1032.2 1029.9 1033.2 1028.0 1021.1 1023.2 1022.3 1018.1 1017.8 1034.7 1035.7 1032.7 1035.7 DAY 4 3 29 22 11 5 5 11 15 12 21 21 MIN. QFE PRESSURE IN HPA 1006.1 1006.6 1002.1 1009.1 1005.0 1006.6 1000.8 1006.0 1007.4 1009.2 1011.3 1005.0 1000.8 DAY 18 26 17 9 7 28 2 7 28 22 28 19 MEAN QNH PRESSURE IN HPA 1019.8 1019.5 1017.3 1017.1 1011.3 1013.4 1009.2 1010.4 1012.8 1019.6 1020.2 1018.8 1015.8 MAX. QNH PRESSURE IN HPA 1031.1 1028.8 1032.1 1026.9 1020.0 1022.1 1021.2 1017.0 1016.7 1033.6 1034.6 1031.6 1034.6 DAY 4 3 29 22 11 5 5 11 15 12 21 21 MIN. QNH PRESSURE IN HPA 1005.0 1005.5 1001.0 1008.0 1003.9 1005.5 999.7 1004.9 1006.3 1008.1 1010.2 1003.9 999.7 DAY 18 26 17 9 7 28 2 7 28 22 28 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1020.1 1019.8 1017.3 1017.5 1011.7 1013.7 1009.5 1010.9 1013.1 1020.1 1020.7 1019.3 1016.1 MAX. QFE PRESSURE IN HPA 1030.9 1029.3 1031.9 1028.1 1020.4 1021.2 1020.9 1018.4 1017.5 1035.2 1035.5 1032.8 1035.5 DAY 4 3 29 22 11 5 4 11 9 12 21 17 MIN. QFE PRESSURE IN HPA 1004.6 1005.2 1002.4 1007.7 1004.5 1005.7 999.1 1004.9 1006.6 1007.6 1010.3 1004.0 999.1 DAY 18 26 17 9 8 28 2 7 28 22 28 19 MEAN QNH PRESSURE IN HPA 1019.0 1018.6 1016.2 1016.4 1010.6 1012.5 1008.4 1009.8 1012.0 1018.9 1019.6 1018.2 1015.0 MAX. QNH PRESSURE IN HPA 1029.8 1028.2 1030.8 1027.0 1019.3 1020.1 1019.8 1017.3 1016.4 1034.1 1034.4 1031.7 1034.4 DAY 4 3 29 22 11 5 4 11 9 12 21 17 MIN. QNH PRESSURE IN HPA 1003.5 1004.1 1001.3 1006.6 1003.4 1004.6 998.0 1003.8 1005.5 1006.5 1009.2 1002.9 998.0 DAY 18 26 17 9 8 28 2 7 28 22 28 19 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1957 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1020.1 1020.4 1017.6 1017.7 1011.6 1013.5 1009.2 1011.0 1013.3 1020.4 1021.2 1020.0 1016.3 MAX. QFE PRESSURE IN HPA 1031.1 1029.9 1031.5 1027.5 1019.5 1021.2 1022.0 1017.2 1017.7 1035.4 1036.2 1033.5 1036.2 DAY 23 3 29 22 11 19 4 11 1 12 23 21 MIN. QFE PRESSURE IN HPA 1004.3 1004.7 1003.2 1008.2 1003.5 1005.1 997.8 1004.3 1006.8 1006.4 1010.3 1006.8 997.8 DAY 18 26 17 9 8 28 2 7 28 22 28 19 MEAN QNH PRESSURE IN HPA 1019.0 1019.2 1016.4 1016.6 1010.4 1012.4 1008.1 1009.9 1012.1 1019.2 1020.1 1018.8 1015.2 MAX. QNH PRESSURE IN HPA 1030.0 1028.8 1030.4 1026.4 1018.4 1020.1 1020.9 1016.1 1016.6 1034.3 1035.1 1032.4 1035.1 DAY 23 3 29 22 11 19 4 11 1 12 23 21 MIN. QNH PRESSURE IN HPA 1003.2 1003.6 1002.1 1007.1 1002.4 1004.0 996.7 1003.2 1005.7 1005.3 1009.2 1005.7 996.7 DAY 18 26 17 9 8 28 2 7 28 22 28 19 MEAN QFF PRESSURE IN HPA 1019.3 1019.5 1016.7 1016.9 1010.8 1012.7 1008.4 1010.2 1012.5 1019.5 1020.4 1019.1 1015.5 MAX. QFF PRESSURE IN HPA 1030.2 1029.0 1030.6 1026.7 1018.7 1020.4 1021.2 1016.4 1016.9 1034.5 1035.3 1032.6 1035.3 DAY 23 3 29 22 11 19 4 11 1 12 23 21 MIN. QFF PRESSURE IN HPA 1003.4 1003.9 1002.4 1007.4 1002.7 1004.3 997.0 1003.5 1006.0 1005.6 1009.5 1006.0 997.0 DAY 18 26 17 9 8 28 2 7 28 22 28 19 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 RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.8 10.6 12.2 14.1 21.6 24.5 25.4 25.7 21.9 17.2 10.5 9.9 16.9 MINIMUN AIR TEMPERATURE (C) 4.7 1.6 5.9 8.4 12.5 16.4 17.6 17.8 16.5 12.1 4.4 4.0 10.2 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 4 3 1 0 0 0 8 DAYS WITH MINIMUM TEMP. <=-4 0 2 0 0 0 0 0 0 0 0 2 0 4 DAYS WITH FREEZING MIN.<= 0 5 10 0 0 0 0 0 0 0 0 7 7 29 TEMPERATURE RECORDS LOWEST(C) -2.0 -7.0 1.0 3.0 7.0 13.0 11.0 12.0 10.0 4.0 -4.0 -2.0 -7.0 DAY 1 2 17 14 9 15 14 6 25 29 23 12 MAXIMUM AIR TEMPERATURE (C) 15.1 17.1 17.0 18.3 26.3 28.6 29.3 29.8 25.7 21.3 15.3 13.6 21.4 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 1 4 12 18 19 4 1 0 0 60 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 22.0 27.0 32.0 33.0 31.0 35.0 34.0 34.0 31.0 32.0 20.0 27.0 35.0 DAY 9 22 14 11 31 30 1 23 1 17 27 8 DIF. BETWEEN (MAX.-MIN.) (C) 10.4 15.5 11.1 9.9 13.8 12.2 11.7 12.0 9.2 9.2 10.9 9.6 11.2 MEAN DAILY TEMP. (MDT) (C) 9.9 9.3 11.5 13.3 19.4 22.5 23.4 23.8 21.1 16.7 9.8 8.8 15.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 15.0 53.0 82.0 88.5 28.5 0.0 0.0 0.0 267.0 HEATING DEG. DAYS(BASE 18 0C) 251.0 242.5 203.5 142.5 18.0 0.0 0.0 0.0 2.0 54.5 245.0 285.5 1444.5 DEWPOINT (MEAN C) 6.2 4.5 8.6 10.4 15.5 19.1 19.9 20.6 19.0 14.7 7.5 6.6 12.7 MIXING RATIO (G/KG) 5.99 5.31 6.98 7.95 11.15 14.11 14.80 15.39 13.92 10.51 6.56 6.12 9.90 VAPOUR PRESSURE (HPA) 9.71 8.63 11.25 12.82 17.88 22.40 23.44 24.40 22.19 16.95 10.71 9.93 15.86 SATURATION DEF. (HPA) 2.80 5.22 3.50 3.86 8.95 9.34 9.85 9.52 4.61 3.33 2.54 2.86 5.53 RELATIVE HUMIDITY (MEAN %) 84 73 82 81 70 74 74 75 85 87 84 84 79 RELATIVE HUMIDITY (MAX. %) 96 92 99 97 96 96 97 96 99 99 98 96 97 RELATIVE HUMIDITY (MIN. %) 70 54 66 68 56 62 60 61 73 73 69 72 65 RELATIVE HUMIDITY (MEAN% 03UTC) 92 90 98 97 96 95 97 96 99 98 96 95 96 RELATIVE HUMIDITY (MEAN% 09UTC) 77 59 69 72 59 64 64 66 75 76 74 76 69 RELATIVE HUMIDITY (MEAN% 15UTC) 85 75 84 80 67 73 71 73 88 92 89 84 80 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 54.8 29.0 40.8 33.3 12.3 40.0 75.9 65.1 232.7 293.6 159.6 99.2 1136.3 DAYS WITH PRECIPITATION >=10 2 1 1 1 0 2 2 3 8 9 2 4 35 DAYS WITH PRECIPITATION >= 5 4 2 2 3 1 3 4 4 12 9 8 5 57 DAYS WITH PRECIPITATION >= 1 11 4 12 5 4 7 7 6 16 14 12 10 108 DAYS WITH PRECIPITATION 16 8 19 16 4 10 11 9 19 19 16 14 161 GREATEST DAILY PRECIPITATION 15.0 15.0 12.0 11.0 5.0 16.0 45.0 22.0 54.0 61.0 62.0 28.0 62.0 DAY 31 6 27 5 5 21 12 4 24 1 21 9 DAY WITH THUNDER STORM 1 1 0 0 3 4 0 0 0 0 0 0 9 DAYS WITH SNOW OR SLEET 1 0 0 0 0 0 0 0 0 0 1 0 2 DAYS WITH DUST 0 0 0 0 0 0 0 0 0 0 0 0 0 WIND DIRECTION (PREVAILING) 270 270 270 270 270 90 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 3.3 2.7 2.7 3.0 3.0 2.7 2.9 1.9 2.4 4.4 4.3 4.0 3.2 PREVAILING WIND PERCENT 31.0 22.1 27.1 26.7 29.0 20.7 23.9 32.9 34.7 47.1 35.3 29.7 29.8 CALMS PERCENT OF WIND 21.3 19.3 14.2 22.0 11.6 15.3 16.8 24.5 22.7 12.9 24.7 21.9 18.9 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 221 209 313 326 327 25 308 259 272 263 241 225 258 VECTOR WIND MAGNITUDE(KNOTS) 1.9 0.6 0.6 0.7 0.8 0.6 0.6 0.5 0.9 2.3 1.8 2.0 0.8 WIND STEADINESES (MEAN %) 54.3 21.4 24.0 31.8 33.3 27.3 33.3 35.7 50.0 71.9 58.1 57.1 32.0 WIND SPEED (MEAN KNOTS) 3.5 2.8 2.5 2.2 2.4 2.2 1.8 1.4 1.8 3.2 3.1 3.5 2.5 FASTEST WIND DIRECTION 180 360 180 360 180 90 270 260 270 180 270 180 180 FASTEST WIND SPEED (KNOTS) 30 22 18 9 15 10 7 12 16 12 30 28 30 DAY 28 3 14 30 12 13 9 3 23 17 20 7 DAYS WITH SKY CLEAR (0-2)/8 2 12 1 1 8 9 9 10 4 1 6 4 67 DAYS WITH P.CLOUDY (3-6)/8 7 7 6 5 18 11 9 9 5 7 10 8 102 DAYS WITH CLOUDY (7-8)/8 22 9 24 24 5 10 13 12 21 23 14 19 196 DAYS WITH VISIBILITY =< 2 KM 5 3 6 2 1 1 0 0 2 2 2 1 25 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1018.8 1020.2 1015.0 1016.0 1016.8 1010.5 1009.1 1011.3 1014.3 1020.9 1026.9 1019.8 1016.6 MAX. QFE PRESSURE IN HPA 1042.2 1030.8 1030.8 1027.4 1028.2 1019.0 1019.0 1020.8 1024.2 1034.2 1039.2 1035.8 1042.2 DAY-HOUR 5-15 13- 3 27- 3 13-12 22- 9 12-15 14- 6 4- 3 24- 6 31- 6 22- 3 5- 6 MIN. QFE PRESSURE IN HPA 1000.8 1006.3 994.0 998.7 1005.1 998.3 999.8 1003.5 1000.9 1006.0 1010.1 1002.7 994.0 DAY-HOUR 30- 9 22-12 14-12 20- 3 2-15 8-15 2-15 16-15 1-15 17-12 27-12 8-12 MEAN QNH PRESSURE IN HPA 1017.7 1019.0 1013.9 1014.9 1015.6 1009.4 1007.9 1010.1 1013.2 1019.7 1025.7 1018.7 1015.5 MAX. QNH PRESSURE IN HPA 1041.1 1029.7 1029.7 1026.3 1027.1 1017.9 1017.9 1019.7 1023.1 1033.1 1038.1 1034.7 1041.1 DAY-HOUR 5-15 13- 3 27- 3 13-12 22- 9 12-15 14- 6 4- 3 24- 6 31- 6 22- 3 5- 6 MIN. QNH PRESSURE IN HPA 999.7 1005.2 992.9 997.6 1004.0 997.2 998.7 1002.4 999.8 1004.9 1009.0 1001.6 992.9 DAY-HOUR 30- 9 22-12 14-12 20- 3 2-15 8-15 2-15 16-15 1-15 17-12 27-12 8-12 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 1018.8 1021.0 1015.7 1016.4 1017.0 1011.3 1009.9 1012.1 1014.7 1021.1 1027.1 1020.3 1017.1 MAX. QFE PRESSURE IN HPA 1027.4 1030.8 1030.8 1025.6 1026.3 1018.0 1018.8 1020.8 1023.2 1033.0 1039.2 1034.8 1039.2 DAY 13 13 27 27 13 13 14 4 24 31 22 5 MIN. QFE PRESSURE IN HPA 1003.3 1008.5 1002.1 998.7 1008.5 1002.8 1001.9 1006.5 1003.6 1008.0 1011.6 1007.4 998.7 DAY 30 22 14 20 2 30 7 16 1 17 28 8 MEAN QNH PRESSURE IN HPA 1017.7 1019.9 1014.6 1015.3 1015.9 1010.2 1008.7 1010.9 1013.6 1020.0 1026.0 1019.2 1016.0 MAX. QNH PRESSURE IN HPA 1026.3 1029.7 1029.7 1024.5 1025.2 1016.9 1017.7 1019.7 1022.1 1031.9 1038.1 1033.7 1038.1 DAY 13 13 27 27 13 13 14 4 24 31 22 5 MIN. QNH PRESSURE IN HPA 1002.2 1007.4 1001.0 997.6 1007.4 1001.7 1000.8 1005.4 1002.5 1006.9 1010.5 1006.3 997.6 DAY 30 22 14 20 2 30 7 16 1 17 28 8 MEAN QFF PRESSURE IN HPA 1017.9 1020.1 1014.9 1015.6 1016.2 1010.5 1009.1 1011.3 1013.9 1020.3 1026.3 1019.5 1016.3 MAX. QFF PRESSURE IN HPA 1026.5 1029.9 1029.9 1024.8 1025.5 1017.2 1018.0 1020.0 1022.4 1032.1 1038.3 1033.9 1038.3 DAY 13 13 27 27 13 13 14 4 24 31 22 5 MIN. QFF PRESSURE IN HPA 1002.5 1007.7 1001.3 997.9 1007.7 1002.0 1001.1 1005.7 1002.8 1007.2 1010.8 1006.6 997.9 DAY 30 22 14 20 2 30 7 16 1 17 28 8 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1019.8 1021.4 1016.3 1016.8 1017.6 1011.4 1009.9 1012.3 1015.3 1021.9 1028.0 1021.0 1017.6 MAX. QFE PRESSURE IN HPA 1030.4 1030.8 1030.5 1026.0 1027.4 1018.4 1019.0 1020.6 1024.2 1034.2 1038.8 1035.8 1038.8 DAY 14 13 27 6 13 13 14 4 24 31 22 5 MIN. QFE PRESSURE IN HPA 1003.7 1008.8 1001.3 1000.9 1008.2 1002.6 1002.6 1005.5 1003.5 1007.7 1013.6 1008.0 1000.9 DAY 30 22 14 20 2 30 10 16 1 17 27 8 MEAN QNH PRESSURE IN HPA 1018.7 1020.3 1015.1 1015.6 1016.4 1010.3 1008.8 1011.1 1014.2 1020.7 1026.9 1019.9 1016.5 MAX. QNH PRESSURE IN HPA 1029.3 1029.7 1029.4 1024.9 1026.3 1017.3 1017.9 1019.5 1023.1 1033.1 1037.7 1034.7 1037.7 DAY 14 13 27 6 13 13 14 4 24 31 22 5 MIN. QNH PRESSURE IN HPA 1002.6 1007.7 1000.2 999.8 1007.1 1001.5 1001.5 1004.4 1002.4 1006.6 1012.5 1006.9 999.8 DAY 30 22 14 20 2 30 10 16 1 17 27 8 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 1018.8 1020.3 1015.2 1015.9 1017.1 1010.4 1009.2 1011.4 1014.3 1021.0 1027.1 1019.8 1016.7 MAX. QFE PRESSURE IN HPA 1030.9 1029.8 1030.4 1025.3 1028.2 1018.2 1018.7 1019.8 1023.6 1033.3 1037.8 1034.2 1037.8 DAY 20 28 27 5 22 13 15 4 19 31 21 5 MIN. QFE PRESSURE IN HPA 1000.8 1008.6 997.9 1000.2 1006.5 1000.9 1002.5 1004.1 1002.2 1007.3 1013.0 1005.6 997.9 DAY 30 22 14 11 2 8 10 16 1 17 27 8 MEAN QNH PRESSURE IN HPA 1017.6 1019.2 1014.1 1014.8 1016.0 1009.2 1008.1 1010.3 1013.1 1019.8 1026.0 1018.6 1015.6 MAX. QNH PRESSURE IN HPA 1029.8 1028.7 1029.3 1024.2 1027.1 1017.1 1017.6 1018.7 1022.5 1032.2 1036.7 1033.1 1036.7 DAY 20 28 27 5 22 13 15 4 19 31 21 5 MIN. QNH PRESSURE IN HPA 999.7 1007.5 996.8 999.1 1005.4 999.8 1001.4 1003.0 1001.1 1006.2 1011.9 1004.5 996.8 DAY 30 22 14 11 2 8 10 16 1 17 27 8 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 1017.7 1018.8 1013.9 1015.5 1016.3 1009.7 1008.2 1010.4 1013.4 1020.0 1025.8 1018.9 1015.7 MAX. QFE PRESSURE IN HPA 1026.7 1029.1 1028.8 1027.4 1025.5 1018.8 1018.2 1018.6 1022.0 1032.9 1037.3 1032.3 1037.3 DAY 14 28 27 13 22 12 13 4 19 31 21 5 MIN. QFE PRESSURE IN HPA 1001.1 1006.3 994.0 1003.2 1005.2 999.9 1000.8 1003.8 1001.0 1006.0 1010.1 1002.7 994.0 DAY 30 22 14 11 2 30 2 16 1 17 27 8 MEAN QNH PRESSURE IN HPA 1016.5 1017.7 1012.8 1014.4 1015.1 1008.6 1007.1 1009.2 1012.3 1018.9 1024.7 1017.7 1014.6 MAX. QNH PRESSURE IN HPA 1025.6 1028.0 1027.7 1026.3 1024.4 1017.7 1017.1 1017.5 1020.9 1031.8 1036.2 1031.2 1036.2 DAY 14 28 27 13 22 12 13 4 19 31 21 5 MIN. QNH PRESSURE IN HPA 1000.0 1005.2 992.9 1002.1 1004.1 998.8 999.7 1002.7 999.9 1004.9 1009.0 1001.6 992.9 DAY 30 22 14 11 2 30 2 16 1 17 27 8 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1958 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1019.2 1019.4 1014.2 1015.7 1015.9 1009.6 1008.1 1010.2 1013.8 1020.4 1026.4 1019.2 1016.0 MAX. QFE PRESSURE IN HPA 1042.2 1030.5 1029.0 1025.6 1024.8 1019.0 1018.3 1018.9 1021.9 1033.0 1037.6 1032.1 1042.2 DAY 5 28 27 3 12 12 13 24 19 31 21 5 MIN. QFE PRESSURE IN HPA 1000.8 1007.0 995.3 1001.3 1005.1 998.3 999.8 1003.5 1000.9 1006.6 1010.1 1003.1 995.3 DAY 30 22 14 19 2 8 2 16 1 17 27 8 MEAN QNH PRESSURE IN HPA 1018.1 1018.3 1013.0 1014.6 1014.8 1008.5 1006.9 1009.1 1012.7 1019.3 1025.3 1018.1 1014.9 MAX. QNH PRESSURE IN HPA 1041.1 1029.4 1027.9 1024.5 1023.7 1017.9 1017.2 1017.8 1020.8 1031.9 1036.5 1031.0 1041.1 DAY 5 28 27 3 12 12 13 24 19 31 21 5 MIN. QNH PRESSURE IN HPA 999.7 1005.9 994.2 1000.2 1004.0 997.2 998.7 1002.4 999.8 1005.5 1009.0 1002.0 994.2 DAY 30 22 14 19 2 8 2 16 1 17 27 8 MEAN QFF PRESSURE IN HPA 1018.4 1018.5 1013.2 1014.8 1015.1 1008.8 1007.3 1009.4 1013.0 1019.6 1025.5 1018.4 1015.2 MAX. QFF PRESSURE IN HPA 1041.3 1029.6 1028.1 1024.7 1024.0 1018.2 1017.5 1018.1 1021.1 1032.1 1036.7 1031.2 1041.3 DAY 5 28 27 3 12 12 13 24 19 31 21 5 MIN. QFF PRESSURE IN HPA 1000.0 1006.2 994.5 1000.5 1004.3 997.5 999.0 1002.7 1000.1 1005.8 1009.3 1002.3 994.5 DAY 30 22 14 19 2 8 2 16 1 17 27 8 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 RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 7.7 3.3 7.5 15.7 20.7 23.1 26.7 25.2 21.3 16.0 10.4 6.6 15.3 MINIMUN AIR TEMPERATURE (C) 2.2 -1.5 2.9 8.6 13.5 15.9 17.8 18.5 15.6 11.9 5.2 1.9 9.4 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 2 6 0 0 0 0 8 DAYS WITH MINIMUM TEMP. <=-4 0 8 0 0 0 0 0 0 0 0 0 3 11 DAYS WITH FREEZING MIN.<= 0 8 22 8 0 0 0 0 0 0 0 2 11 51 TEMPERATURE RECORDS LOWEST(C) -3.0 -7.0 -2.0 3.0 6.0 11.0 14.0 14.0 11.0 6.0 0.0 -5.0 -7.0 DAY 3 19 9 2 3 1 4 28 25 9 26 15 MAXIMUM AIR TEMPERATURE (C) 11.8 7.2 10.9 20.2 24.9 26.6 30.7 28.9 24.8 18.8 13.6 10.0 19.1 DAYS WITH MAXIMUM TEMP. >=30 0 0 0 1 2 5 23 15 2 1 0 0 49 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 19.0 17.0 22.0 32.0 31.0 33.0 36.0 34.0 34.0 32.0 20.0 23.0 36.0 DAY 31 24 11 14 19 15 18 3 2 25 4 6 DIF. BETWEEN (MAX.-MIN.) (C) 9.6 8.7 8.0 11.6 11.4 10.7 12.9 10.4 9.2 6.9 8.4 8.1 9.7 MEAN DAILY TEMP. (MDT) (C) 7.0 2.9 6.9 14.4 19.2 21.2 24.3 23.7 20.2 15.4 9.4 5.9 14.2 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 0.0 7.5 34.0 102.0 89.0 13.0 0.5 0.0 0.0 246.0 HEATING DEG. DAYS(BASE 18 0C) 340.5 423.5 343.0 113.5 20.0 5.5 0.0 0.0 3.5 87.5 257.5 374.0 1968.5 DEWPOINT (MEAN C) 6.0 1.1 5.4 11.5 15.7 18.2 19.9 20.2 18.0 14.1 8.5 4.8 11.9 MIXING RATIO (G/KG) 5.83 4.17 5.56 8.55 11.27 13.28 14.75 15.03 13.09 10.03 7.02 5.37 9.50 VAPOUR PRESSURE (HPA) 9.46 6.79 9.05 13.77 18.02 21.15 23.34 23.78 20.86 16.18 11.42 8.77 15.21 SATURATION DEF. (HPA) 1.31 1.27 1.59 4.93 7.06 7.83 12.64 9.30 5.06 2.35 1.69 1.37 4.70 RELATIVE HUMIDITY (MEAN %) 90 88 88 78 75 76 68 76 84 90 90 90 83 RELATIVE HUMIDITY (MAX. %) 100 97 100 98 97 96 94 96 99 99 100 98 98 RELATIVE HUMIDITY (MIN. %) 78 78 77 64 61 64 54 62 70 78 78 79 70 RELATIVE HUMIDITY (MEAN% 03UTC) 100 93 99 98 95 96 93 95 96 98 99 97 97 RELATIVE HUMIDITY (MEAN% 09UTC) 85 82 79 68 64 67 59 67 76 82 83 85 75 RELATIVE HUMIDITY (MEAN% 15UTC) 87 91 88 76 76 73 66 75 86 93 91 90 83 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 110.1 229.3 129.6 23.7 37.0 65.7 4.0 70.3 189.9 228.3 240.9 131.3 1460.1 DAYS WITH PRECIPITATION >=10 5 10 3 0 2 1 0 2 4 10 8 5 50 DAYS WITH PRECIPITATION >= 5 6 13 7 3 2 2 0 6 6 14 14 5 78 DAYS WITH PRECIPITATION >= 1 7 16 17 6 8 6 1 13 13 18 18 10 133 DAYS WITH PRECIPITATION 9 22 22 10 15 12 4 16 14 25 18 14 181 GREATEST DAILY PRECIPITATION 27.0 30.0 33.0 7.0 13.0 49.0 3.0 15.0 56.0 30.0 32.0 35.0 56.0 DAY 1 8 22 3 2 2 22 20 20 6 20 13 DAY WITH THUNDER STORM 0 1 0 0 0 1 0 0 1 0 0 0 3 DAYS WITH SNOW OR SLEET 1 11 1 0 0 0 0 0 0 0 1 2 16 DAYS WITH DUST 0 1 0 0 0 0 0 0 0 0 0 1 2 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 3.8 8.5 4.8 5.1 4.9 5.7 5.1 5.5 4.5 6.1 8.4 6.0 6.0 PREVAILING WIND PERCENT 30.3 44.3 31.6 18.0 23.9 22.0 20.0 26.5 22.0 48.4 42.7 47.1 31.3 CALMS PERCENT OF WIND 12.3 9.3 16.8 22.7 10.3 15.3 20.6 25.8 25.3 19.4 26.0 18.1 18.5 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 256 253 281 331 273 284 277 268 247 277 258 252 266 VECTOR WIND MAGNITUDE(KNOTS) 1.7 4.0 1.8 1.5 0.4 1.0 0.9 1.5 1.3 2.8 4.0 3.4 1.9 WIND STEADINESES (MEAN %) 54.8 61.5 47.4 38.5 9.1 23.3 23.7 37.5 38.2 62.2 72.7 72.3 44.2 WIND SPEED (MEAN KNOTS) 3.1 6.5 3.8 3.9 4.4 4.3 3.8 4.0 3.4 4.5 5.5 4.7 4.3 FASTEST WIND DIRECTION 240 180 310 340 90 270 350 270 230 270 260 180 180 FASTEST WIND SPEED (KNOTS) 13 26 18 26 15 12 9 14 12 18 24 30 30 DAY 21 24 11 14 19 2 25 10 22 18 28 6 DAYS WITH SKY CLEAR (0-2)/8 4 4 2 6 4 7 10 9 4 3 3 6 62 DAYS WITH P.CLOUDY (3-6)/8 11 6 5 6 11 10 12 6 4 4 4 5 84 DAYS WITH CLOUDY (7-8)/8 16 18 24 18 16 13 9 16 22 24 23 20 219 DAYS WITH VISIBILITY =< 2 KM 8 10 1 4 1 0 0 0 8 15 5 5 57 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1019.6 1020.2 1021.6 1016.3 1013.0 1012.6 1008.1 1008.4 1012.4 1019.9 1024.9 1025.2 1016.8 MAX. QFE PRESSURE IN HPA 1034.2 1031.7 1031.3 1027.5 1024.7 1020.7 1013.7 1018.1 1023.6 1034.8 1036.8 1049.0 1049.0 DAY-HOUR 2- 6 13-15 14- 6 3- 3 2-15 8- 6 2- 6 24- 3 28- 3 26- 6 29- 9 14- 6 MIN. QFE PRESSURE IN HPA 1006.1 1008.1 1010.4 1001.7 999.4 1002.7 1002.8 1001.1 1000.5 1003.1 1013.1 1011.9 999.4 DAY-HOUR 31-12 19-15 17-15 24-12 19-12 16-15 25-15 9-12 2-12 12- 9 5-15 5-12 MEAN QNH PRESSURE IN HPA 1018.4 1019.1 1020.5 1015.1 1011.9 1011.4 1006.9 1007.3 1011.3 1018.7 1023.7 1024.1 1015.7 MAX. QNH PRESSURE IN HPA 1033.1 1030.6 1030.2 1026.4 1023.6 1019.6 1012.6 1017.0 1022.5 1033.7 1035.7 1047.8 1047.8 DAY-HOUR 2- 6 13-15 14- 6 3- 3 2-15 8- 6 2- 6 24- 3 28- 3 26- 6 29- 9 14- 6 MIN. QNH PRESSURE IN HPA 1005.0 1007.0 1009.3 1000.6 998.3 1001.6 1001.7 1000.0 999.4 1002.0 1012.0 1010.8 998.3 DAY-HOUR 31-12 19-15 17-15 24-12 19-12 16-15 25-15 9-12 2-12 12- 9 5-15 5-12 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 1019.4 1020.2 1021.8 1016.7 1013.6 1013.5 1008.9 1009.0 1013.0 1020.4 1024.9 1025.6 1017.2 MAX. QFE PRESSURE IN HPA 1031.5 1031.0 1029.1 1027.5 1022.1 1020.4 1013.6 1018.1 1023.6 1034.0 1035.2 1041.3 1041.3 DAY 2 14 14 3 3 21 2 24 28 26 29 14 MIN. QFE PRESSURE IN HPA 1010.9 1009.5 1011.2 1008.2 1000.5 1008.1 1005.9 1001.9 1002.8 1005.6 1014.4 1012.9 1000.5 DAY 19 24 1 5 19 16 20 9 2 12 6 6 MEAN QNH PRESSURE IN HPA 1018.3 1019.1 1020.7 1015.5 1012.5 1012.3 1007.8 1007.8 1011.9 1019.3 1023.7 1024.5 1016.1 MAX. QNH PRESSURE IN HPA 1030.4 1029.9 1028.0 1026.4 1021.0 1019.3 1012.5 1017.0 1022.5 1032.9 1034.1 1040.2 1040.2 DAY 2 14 14 3 3 21 2 24 28 26 29 14 MIN. QNH PRESSURE IN HPA 1009.8 1008.4 1010.1 1007.1 999.4 1007.0 1004.8 1000.8 1001.7 1004.5 1013.3 1011.8 999.4 DAY 19 24 1 5 19 16 20 9 2 12 6 6 MEAN QFF PRESSURE IN HPA 1018.6 1019.4 1020.9 1015.8 1012.8 1012.7 1008.1 1008.2 1012.2 1019.6 1024.0 1024.8 1016.4 MAX. QFF PRESSURE IN HPA 1030.6 1030.1 1028.2 1026.6 1021.2 1019.6 1012.8 1017.3 1022.8 1033.2 1034.3 1040.4 1040.4 DAY 2 14 14 3 3 21 2 24 28 26 29 14 MIN. QFF PRESSURE IN HPA 1010.1 1008.7 1010.3 1007.4 999.7 1007.3 1005.1 1001.1 1002.0 1004.8 1013.6 1012.1 999.7 DAY 19 24 1 5 19 16 20 9 2 12 6 6 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1021.0 1021.2 1022.6 1017.5 1013.9 1013.3 1009.0 1009.4 1013.7 1020.8 1025.6 1026.4 1017.9 MAX. QFE PRESSURE IN HPA 1034.2 1031.0 1031.3 1027.5 1023.0 1020.7 1013.7 1016.9 1023.0 1034.8 1036.3 1049.0 1049.0 DAY 2 14 14 3 3 8 2 25 28 26 29 14 MIN. QFE PRESSURE IN HPA 1012.8 1010.0 1014.0 1007.7 1000.9 1006.7 1004.7 1002.5 1002.8 1004.3 1016.0 1012.9 1000.9 DAY 31 24 1 24 19 1 20 9 2 12 6 6 MEAN QNH PRESSURE IN HPA 1019.9 1020.1 1021.4 1016.3 1012.8 1012.2 1007.9 1008.3 1012.6 1019.6 1024.4 1025.2 1016.7 MAX. QNH PRESSURE IN HPA 1033.1 1029.9 1030.2 1026.4 1021.9 1019.6 1012.6 1015.8 1021.9 1033.7 1035.2 1047.8 1047.8 DAY 2 14 14 3 3 8 2 25 28 26 29 14 MIN. QNH PRESSURE IN HPA 1011.7 1008.9 1012.9 1006.6 999.8 1005.6 1003.6 1001.4 1001.7 1003.2 1014.9 1011.8 999.8 DAY 31 24 1 24 19 1 20 9 2 12 6 6 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 1019.8 1020.5 1021.9 1016.8 1013.0 1012.6 1008.3 1008.7 1012.7 1019.9 1025.1 1025.1 1017.0 MAX. QFE PRESSURE IN HPA 1032.8 1031.2 1030.0 1026.8 1023.5 1020.3 1013.3 1017.9 1022.0 1034.5 1036.8 1040.6 1040.6 DAY 2 13 20 3 2 7 2 24 28 26 29 14 MIN. QFE PRESSURE IN HPA 1008.1 1008.9 1013.3 1007.4 999.5 1004.5 1004.0 1001.7 1001.5 1003.1 1014.6 1012.5 999.5 DAY 31 19 1 13 19 1 25 9 2 12 5 5 MEAN QNH PRESSURE IN HPA 1018.6 1019.4 1020.8 1015.6 1011.9 1011.4 1007.1 1007.6 1011.6 1018.7 1023.9 1024.0 1015.9 MAX. QNH PRESSURE IN HPA 1031.7 1030.1 1028.9 1025.7 1022.4 1019.2 1012.2 1016.8 1020.9 1033.4 1035.7 1039.5 1039.5 DAY 2 13 20 3 2 7 2 24 28 26 29 14 MIN. QNH PRESSURE IN HPA 1007.0 1007.8 1012.2 1006.3 998.4 1003.4 1002.9 1000.6 1000.4 1002.0 1013.5 1011.4 998.4 DAY 31 19 1 13 19 1 25 9 2 12 5 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** PRESSURE AT HOUR 1200 UTC. MEAN QFE PRESSURE IN HPA 1018.7 1019.4 1020.7 1015.3 1012.3 1011.8 1007.3 1007.7 1011.4 1018.9 1024.3 1024.3 1016.0 MAX. QFE PRESSURE IN HPA 1030.1 1030.7 1029.3 1025.1 1023.5 1019.6 1011.8 1015.7 1021.0 1033.6 1034.6 1037.1 1037.1 DAY 2 10 14 27 2 7 2 24 20 26 29 13 MIN. QFE PRESSURE IN HPA 1006.1 1008.5 1011.2 1001.7 999.4 1003.8 1003.5 1001.1 1000.5 1005.2 1013.2 1011.9 999.4 DAY 31 19 28 24 19 16 25 9 2 12 5 5 MEAN QNH PRESSURE IN HPA 1017.6 1018.2 1019.6 1014.1 1011.2 1010.7 1006.2 1006.6 1010.2 1017.7 1023.1 1023.2 1014.9 MAX. QNH PRESSURE IN HPA 1029.0 1029.6 1028.2 1024.0 1022.4 1018.5 1010.7 1014.6 1019.9 1032.5 1033.5 1036.0 1036.0 DAY 2 10 14 27 2 7 2 24 20 26 29 13 MIN. QNH PRESSURE IN HPA 1005.0 1007.4 1010.1 1000.6 998.3 1002.7 1002.4 1000.0 999.4 1004.1 1012.1 1010.8 998.3 DAY 31 19 28 24 19 16 25 9 2 12 5 5 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1959 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1019.0 1019.9 1021.1 1015.3 1012.2 1011.7 1007.0 1007.5 1011.4 1019.4 1024.5 1024.7 1016.2 MAX. QFE PRESSURE IN HPA 1030.3 1031.7 1029.9 1025.6 1024.7 1019.3 1011.5 1015.9 1021.3 1032.1 1034.6 1038.5 1038.5 DAY 21 13 14 27 2 7 2 24 23 26 29 13 MIN. QFE PRESSURE IN HPA 1007.8 1008.1 1010.4 1003.6 1001.4 1002.7 1002.8 1001.7 1001.3 1006.0 1013.1 1014.0 1001.3 DAY 31 19 17 24 19 16 25 5 2 13 5 6 MEAN QNH PRESSURE IN HPA 1017.9 1018.8 1020.0 1014.2 1011.1 1010.6 1005.9 1006.4 1010.3 1018.3 1023.4 1023.5 1015.0 MAX. QNH PRESSURE IN HPA 1029.2 1030.6 1028.8 1024.5 1023.6 1018.2 1010.4 1014.8 1020.2 1031.0 1033.5 1037.4 1037.4 DAY 21 13 14 27 2 7 2 24 23 26 29 13 MIN. QNH PRESSURE IN HPA 1006.7 1007.0 1009.3 1002.5 1000.3 1001.6 1001.7 1000.6 1000.2 1004.9 1012.0 1012.9 1000.2 DAY 31 19 17 24 19 16 25 5 2 13 5 6 MEAN QFF PRESSURE IN HPA 1018.2 1019.0 1020.2 1014.5 1011.4 1010.9 1006.2 1006.7 1010.6 1018.6 1023.7 1023.8 1015.3 MAX. QFF PRESSURE IN HPA 1029.4 1030.8 1029.0 1024.8 1023.9 1018.5 1010.7 1015.1 1020.5 1031.3 1033.7 1037.6 1037.6 DAY 21 13 14 27 2 7 2 24 23 26 29 13 MIN. QFF PRESSURE IN HPA 1007.0 1007.2 1009.6 1002.8 1000.6 1001.9 1002.0 1000.9 1000.5 1005.2 1012.3 1013.2 1000.5 DAY 31 19 17 24 19 16 25 9 2 13 5 6 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 RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 9.6 8.6 6.9 13.9 20.0 24.4 25.9 25.3 23.1 19.8 14.1 10.6 16.9 MINIMUN AIR TEMPERATURE (C) 3.1 2.6 1.9 8.6 13.3 17.4 18.5 19.6 18.1 12.5 8.6 4.9 10.8 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 4 12 5 0 0 0 21 DAYS WITH MINIMUM TEMP. <=-4 0 2 1 0 0 0 0 0 0 0 0 0 3 DAYS WITH FREEZING MIN.<= 0 6 8 11 0 0 0 0 0 0 0 0 0 25 TEMPERATURE RECORDS LOWEST(C) -3.0 -4.0 -6.0 3.0 7.0 10.0 15.0 16.0 12.0 8.0 4.0 1.0 -6.0 DAY 29 11 14 16 19 9 10 1 30 12 11 21 MAXIMUM AIR TEMPERATURE (C) 14.5 13.0 10.7 18.1 24.3 27.9 29.6 28.4 26.2 24.5 18.2 15.0 20.9 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 1 7 13 18 14 7 0 0 0 61 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 28.0 26.0 30.0 34.0 31.0 33.0 34.0 32.0 31.0 28.0 26.0 22.0 34.0 DAY 20 19 31 25 22 15 31 1 2 1 19 1 DIF. BETWEEN (MAX.-MIN.) (C) 11.4 10.4 8.8 9.5 11.0 10.5 11.1 8.8 8.1 12.0 9.6 10.1 10.1 MEAN DAILY TEMP. (MDT) (C) 8.8 7.8 6.3 13.3 18.8 22.6 24.0 24.0 22.2 18.5 13.4 10.0 15.8 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 4.0 14.0 63.0 95.0 94.0 52.0 0.5 0.0 0.0 322.5 HEATING DEG. DAYS(BASE 18 0C) 286.0 286.0 361.5 152.5 24.0 0.5 0.0 0.0 1.0 9.0 140.5 248.5 1509.5 DEWPOINT (MEAN C) 5.9 5.8 3.9 9.1 15.1 18.4 19.8 20.5 19.5 16.0 11.1 7.9 12.7 MIXING RATIO (G/KG) 5.88 5.78 5.05 7.42 10.81 13.48 14.64 15.28 14.36 11.40 8.33 6.58 9.92 VAPOUR PRESSURE (HPA) 9.53 9.39 8.22 11.96 17.33 21.42 23.20 24.19 22.91 18.35 13.49 10.72 15.89 SATURATION DEF. (HPA) 3.06 2.38 2.32 4.94 6.99 10.19 11.18 8.69 5.98 5.38 3.09 2.34 5.55 RELATIVE HUMIDITY (MEAN %) 83 85 84 76 75 72 71 76 82 80 84 84 79 RELATIVE HUMIDITY (MAX. %) 98 98 98 93 93 95 90 93 96 97 96 98 95 RELATIVE HUMIDITY (MIN. %) 63 71 72 61 62 59 59 63 70 64 72 69 65 RELATIVE HUMIDITY (MEAN% 03UTC) 97 96 97 92 92 95 90 92 95 96 94 98 95 RELATIVE HUMIDITY (MEAN% 09UTC) 71 79 79 68 67 63 62 67 73 68 75 75 71 RELATIVE HUMIDITY (MEAN% 15UTC) 80 86 82 79 72 70 69 76 82 85 89 86 80 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 21.5 49.0 213.9 86.9 56.5 68.0 63.0 64.8 168.6 85.0 153.2 118.0 1148.4 DAYS WITH PRECIPITATION >=10 0 2 8 4 2 2 2 4 6 3 6 4 43 DAYS WITH PRECIPITATION >= 5 1 3 10 6 3 4 4 4 6 3 8 4 56 DAYS WITH PRECIPITATION >= 1 6 7 15 14 5 9 6 8 10 7 11 7 105 DAYS WITH PRECIPITATION 10 8 19 20 10 9 7 12 12 7 12 8 134 GREATEST DAILY PRECIPITATION 8.0 17.0 51.0 18.0 32.0 25.0 26.0 17.0 34.0 34.0 43.0 42.0 51.0 DAY 27 22 12 14 18 21 7 17 19 22 7 19 DAY WITH THUNDER STORM 0 0 1 0 1 0 0 0 0 1 0 1 4 DAYS WITH SNOW OR SLEET 0 1 4 0 0 0 0 0 0 0 0 0 5 DAYS WITH DUST 0 1 0 0 0 0 0 0 0 0 0 1 2 WIND DIRECTION (PREVAILING) 270 270 270 270 270 270 270 270 270 270 270 270 270 PREVAILING WIND SPEED(KNOTS) 5.4 5.3 7.2 7.0 4.5 5.1 6.0 5.0 4.5 4.4 5.3 5.0 5.5 PREVAILING WIND PERCENT 34.2 35.0 31.0 32.7 20.0 26.0 21.9 27.7 25.3 25.8 32.0 27.1 28.2 CALMS PERCENT OF WIND 18.1 20.7 18.1 14.7 21.9 28.7 29.0 17.4 18.0 20.6 21.3 25.2 21.2 NO. OF WIND OBSERVATION 155 140 155 150 155 150 155 155 150 155 150 155 1825 VECTOR WIND DIRECTION (MEAN) 247 275 280 287 335 287 280 285 303 288 259 264 278 VECTOR WIND MAGNITUDE(KNOTS) 2.3 1.9 2.0 2.1 1.2 1.0 1.3 1.0 0.9 1.1 1.7 1.6 1.4 WIND STEADINESES (MEAN %) 45.1 47.5 39.2 38.2 31.6 27.0 38.2 24.4 25.7 35.5 50.0 51.6 35.0 WIND SPEED (MEAN KNOTS) 5.1 4.0 5.1 5.5 3.8 3.7 3.4 4.1 3.5 3.1 3.4 3.1 4.0 FASTEST WIND DIRECTION 180 180 360 260 300 40 230 360 230 270 350 260 360 FASTEST WIND SPEED (KNOTS) 26 15 35 35 15 15 12 12 12 15 19 15 35 DAY 9 1 8 1 18 22 8 2 16 21 13 1 DAYS WITH SKY CLEAR (0-2)/8 6 4 5 3 6 10 13 8 4 9 6 3 77 DAYS WITH P.CLOUDY (3-6)/8 11 6 4 5 8 10 8 5 8 14 11 13 103 DAYS WITH CLOUDY (7-8)/8 14 18 22 22 17 10 10 18 18 8 13 15 185 DAYS WITH VISIBILITY =< 2 KM 5 6 4 0 1 1 1 0 0 4 3 0 25 DURATION OF SUNSHINE HOURS ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL MEAN QFE PRESSURE IN HPA 1019.3 1020.3 1020.7 1017.2 1016.3 1011.0 1009.6 1009.0 1015.6 1019.5 1021.5 1024.5 1017.0 MAX. QFE PRESSURE IN HPA 1029.1 1032.5 1037.9 1045.7 1026.8 1022.7 1039.3 1017.6 1023.8 1025.8 1033.0 1031.6 1045.7 DAY-HOUR 27-15 7- 6 19- 6 20-12 5- 6 7- 6 25- 3 14- 6 20- 9 27-15 26- 6 4- 3 MIN. QFE PRESSURE IN HPA 1007.3 1007.7 1001.4 1003.0 1002.6 1000.2 999.9 999.7 1008.1 1009.7 1003.7 1010.3 999.7 DAY-HOUR 20- 9 21-12 2-12 25-15 30-15 20-15 5-15 23-15 13-12 10-12 19- 9 29-12 MEAN QNH PRESSURE IN HPA 1018.2 1019.1 1019.6 1016.1 1015.2 1009.9 1008.5 1007.9 1014.5 1018.3 1020.3 1023.3 1015.9 MAX. QNH PRESSURE IN HPA 1028.0 1031.4 1036.8 1044.5 1025.7 1021.6 1038.2 1016.5 1022.7 1024.7 1031.9 1030.5 1044.5 DAY-HOUR 27-15 7- 6 19- 6 20-12 5- 6 7- 6 25- 3 14- 6 20- 9 27-15 26- 6 4- 3 MIN. QNH PRESSURE IN HPA 1006.2 1006.6 1000.3 1001.9 1001.5 999.1 998.8 998.6 1007.0 1008.6 1002.6 1009.2 998.6 DAY-HOUR 20- 9 21-12 2-12 25-15 30-15 20-15 5-15 23-15 13-12 10-12 19- 9 29-12 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 1019.7 1020.6 1021.1 1017.0 1017.2 1012.1 1011.0 1009.9 1016.0 1019.8 1022.0 1024.5 1017.6 MAX. QFE PRESSURE IN HPA 1028.5 1031.5 1036.8 1039.9 1026.4 1022.1 1039.3 1017.4 1022.0 1025.8 1032.4 1031.6 1039.9 DAY 28 7 19 7 5 7 25 14 19 31 26 4 MIN. QFE PRESSURE IN HPA 1010.1 1009.5 1006.0 1004.2 1005.5 1004.9 1002.6 1004.0 1009.6 1013.0 1004.4 1013.9 1002.6 DAY 23 21 2 1 30 20 5 23 4 21 19 29 MEAN QNH PRESSURE IN HPA 1018.6 1019.5 1020.0 1015.9 1016.0 1011.0 1009.9 1008.8 1014.9 1018.7 1020.9 1023.3 1016.4 MAX. QNH PRESSURE IN HPA 1027.4 1030.4 1035.7 1038.8 1025.3 1021.0 1038.2 1016.3 1020.9 1024.7 1031.3 1030.5 1038.8 DAY 28 7 19 7 5 7 25 14 19 31 26 4 MIN. QNH PRESSURE IN HPA 1009.0 1008.4 1004.9 1003.1 1004.4 1003.8 1001.5 1002.9 1008.5 1011.9 1003.3 1012.8 1001.5 DAY 23 21 2 1 30 20 5 23 4 21 19 29 MEAN QFF PRESSURE IN HPA 1018.8 1020.0 1020.2 1016.2 1016.3 1011.3 1010.2 1009.1 1015.2 1019.0 1021.2 1023.6 1016.8 MAX. QFF PRESSURE IN HPA 1027.6 1030.6 1035.9 1039.0 1025.6 1021.3 1038.5 1016.6 1021.2 1025.0 1031.5 1030.7 1039.0 DAY 28 7 19 7 5 7 25 14 19 31 26 4 MIN. QFF PRESSURE IN HPA 1009.3 1008.7 1005.2 1003.4 1004.7 1004.1 1001.8 1003.2 1008.8 1012.2 1003.6 1013.1 1001.8 DAY 23 21 2 1 30 20 5 23 4 21 19 29 ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 0600 UTC. MEAN QFE PRESSURE IN HPA 1020.5 1021.3 1021.7 1017.8 1017.3 1012.2 1010.2 1010.1 1016.8 1020.5 1022.6 1025.7 1018.0 MAX. QFE PRESSURE IN HPA 1029.0 1032.5 1037.9 1041.6 1026.8 1022.7 1014.5 1017.6 1023.6 1025.6 1033.0 1031.6 1041.6 DAY 28 7 19 7 5 7 9 14 20 22 26 4 MIN. QFE PRESSURE IN HPA 1010.0 1010.9 1004.4 1004.3 1006.5 1004.0 1002.3 1003.1 1009.5 1013.5 1004.2 1014.0 1002.3 DAY 16 19 2 1 30 30 5 24 4 10 19 29 MEAN QNH PRESSURE IN HPA 1019.3 1020.2 1020.5 1016.6 1016.1 1011.1 1009.0 1008.9 1015.6 1019.4 1021.4 1024.5 1016.9 MAX. QNH PRESSURE IN HPA 1027.9 1031.4 1036.8 1040.5 1025.7 1021.6 1013.4 1016.5 1022.5 1024.5 1031.9 1030.5 1040.5 DAY 28 7 19 7 5 7 9 14 20 22 26 4 MIN. QNH PRESSURE IN HPA 1008.9 1009.8 1003.3 1003.2 1005.4 1002.9 1001.2 1002.0 1008.4 1012.4 1003.1 1012.9 1001.2 DAY 16 19 2 1 30 30 5 24 4 10 19 29 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 1019.3 1020.8 1021.2 1017.2 1016.3 1010.9 1009.5 1009.2 1016.0 1019.7 1021.5 1024.3 1017.2 MAX. QFE PRESSURE IN HPA 1028.6 1032.4 1037.8 1041.4 1026.5 1022.7 1014.1 1016.1 1023.8 1025.6 1031.8 1029.0 1041.4 DAY 27 7 19 7 5 7 9 14 20 22 26 8 MIN. QFE PRESSURE IN HPA 1007.3 1009.3 1002.7 1003.5 1004.9 1002.7 1001.5 1001.4 1009.0 1011.9 1003.7 1011.1 1001.4 DAY 20 29 2 1 30 20 5 23 4 10 19 29 MEAN QNH PRESSURE IN HPA 1018.2 1019.6 1020.1 1016.0 1015.2 1009.8 1008.3 1008.1 1014.8 1018.6 1020.4 1023.2 1016.0 MAX. QNH PRESSURE IN HPA 1027.5 1031.3 1036.7 1040.3 1025.4 1021.6 1013.0 1015.0 1022.7 1024.5 1030.7 1027.9 1040.3 DAY 27 7 19 7 5 7 9 14 20 22 26 8 MIN. QNH PRESSURE IN HPA 1006.2 1008.2 1001.6 1002.4 1003.8 1001.6 1000.4 1000.3 1007.9 1010.8 1002.6 1010.0 1000.3 DAY 20 29 2 1 30 20 5 23 4 10 19 29 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 1018.3 1019.4 1019.8 1017.5 1015.5 1010.0 1009.2 1008.0 1014.6 1018.6 1020.5 1023.6 1016.3 MAX. QFE PRESSURE IN HPA 1028.7 1032.1 1036.6 1045.7 1024.9 1022.0 1033.1 1015.2 1023.3 1024.7 1031.4 1028.5 1045.7 DAY 27 10 19 20 5 7 21 14 20 22 25 16 MIN. QFE PRESSURE IN HPA 1008.0 1007.7 1001.4 1003.9 1003.0 1001.1 1000.1 1000.3 1008.1 1009.7 1005.6 1010.3 1000.1 DAY 20 21 2 25 30 20 5 23 13 10 19 29 MEAN QNH PRESSURE IN HPA 1017.2 1018.3 1018.6 1016.4 1014.4 1008.9 1008.0 1006.8 1013.5 1017.4 1019.4 1022.5 1015.1 MAX. QNH PRESSURE IN HPA 1027.6 1031.0 1035.5 1044.5 1023.8 1020.9 1032.0 1014.1 1022.2 1023.6 1030.3 1027.4 1044.5 DAY 27 10 19 20 5 7 21 14 20 22 25 16 MIN. QNH PRESSURE IN HPA 1006.9 1006.6 1000.3 1002.8 1001.9 1000.0 999.0 999.2 1007.0 1008.6 1004.5 1009.2 999.0 DAY 20 21 2 25 30 20 5 23 13 10 19 29 MEAN QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** MAX. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** MIN. QFF PRESSURE IN HPA ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** ****** DAY ** ** ** ** ** ** ** ** ** ** ** ** ======================================================================================================================= TEHRAN 2006,MAY M.(S & A) STATION RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1960 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL PRESSURE AT HOUR 1500 UTC. MEAN QFE PRESSURE IN HPA 1019.0 1019.3 1020.0 1016.6 1015.4 1010.0 1008.4 1008.0 1014.9 1018.8 1020.7 1024.3 1016.3 MAX. QFE PRESSURE IN HPA 1029.1 1032.2 1036.9 1040.8 1024.5 1021.5 1014.2 1015.2 1023.3 1025.8 1032.4 1030.1 1040.8 DAY 27 10 19 7 5 7 8 13 20 27 25 16 MIN. QFE PRESSURE IN HPA 1008.1 1008.3 1003.2 1003.0 1002.6 1000.2 999.9 999.7 1008.5 1010.8 1004.9 1011.0 999.7 DAY 20 21 2 25 30 20 5 23 3 20 19 29 MEAN QNH PRESSURE IN HPA 1017.8 1018.2 1018.8 1015.5 1014.2 1008.8 1007.2 1006.9 1013.8 1017.6 1019.6 1023.2 1015.1 MAX. QNH PRESSURE IN HPA 1028.0 1031.1 1035.8 1039.7 1023.4 1020.4 1013.1 1014.1 1022.2 1024.7 1031.3 1029.0 1039.7 DAY 27 10 19 7 5 7 8 13 20 27 25 16 MIN. QNH PRESSURE IN HPA 1007.0 1007.2 1002.1 1001.9 1001.5 999.1 998.8 998.6 1007.4 1009.7 1003.8 1009.9 998.6 DAY 20 21 2 25 30 20 5 23 3 20 19 29 MEAN QFF PRESSURE IN HPA 1018.1 1018.5 1019.1 1015.7 1014.6 1009.2 1007.6 1007.2 1014.1 1017.9 1019.9 1023.5 1015.4 MAX. QFF PRESSURE IN HPA 1028.2 1031.3 1036.0 1039.9 1023.7 1020.7 1013.4 1014.4 1022.5 1025.0 1031.5 1029.2 1039.9 DAY 27 10 19 7 5 7 8 13 20 27 25 16 MIN. QFF PRESSURE IN HPA 1007.3 1007.5 1002.4 1002.2 1001.8 999.4 999.1 998.9 1007.7 1010.0 1004.1 1010.2 998.9 DAY 20 21 2 25 30 20 5 23 3 20 19 29 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 RASHT (40719) I.R OF IRAN METEOROLOGICAL ORGANIZATION (IRIMO) LATITUDE 37 15 N LONGITUDE 49 36 E DATA PROCESSING CENTER ELEVATION -6.9 M MEANS AND EXTREMES FOR THE YEAR 1961 JAN. FEB. MAR. APR. MAY JUNE JULY AUG. SEP. OCT. NOV. DEC. ANNUAL AIR TEMPERATURE (C) 8.5 8.4 10.9 15.5 23.1 25.6 26.3 26.2 20.8 17.5 15.0 12.1 17.5 MINIMUN AIR TEMPERATURE (C) 2.2 2.6 4.3 7.9 15.1 16.7 19.5 18.5 17.1 13.1 8.9 5.2 10.9 DAYS WITH MINIMUM TEMP. >=21 0 0 0 0 0 0 5 6 0 0 0 0 11 DAYS WITH MINIMUM TEMP. <=-4 0 1 0 0 0 0 0 0 0 0 0 0 1 DAYS WITH FREEZING MIN.<= 0 11 9 4 0 0 0 0 0 0 0 0 0 24 TEMPERATURE RECORDS LOWEST(C) 0.0 -4.0 -2.0 1.0 11.0 13.0 18.0 15.0 12.0 7.0 1.0 1.0 -4.0 DAY 7 2 4 17 18 8 7 9 20 29 27 25 MAXIMUM AIR TEMPERATURE (C) 12.6 11.7 15.2 20.3 27.6 29.8 30.0 31.0 23.8 21.2 19.9 16.9 21.7 DAYS WITH MAXIMUM TEMP. >=30 0 0 1 1 7 16 22 23 2 1 0 0 73 DAYS WITH MAXIMUM TEMP. <= 0 0 0 0 0 0 0 0 0 0 0 0 0 0 TEMPERATURE RECORDS HIGHEST(C) 24.0 23.0 30.0 30.0 34.0 35.0 34.0 36.0 31.0 37.0 27.0 23.0 37.0 DAY 26 7 24 21 23 22 20 18 10 15 16 3 DIF. BETWEEN (MAX.-MIN.) (C) 10.4 9.1 10.9 12.4 12.5 13.1 10.5 12.5 6.7 8.1 11.0 11.7 10.8 MEAN DAILY TEMP. (MDT) (C) 7.4 7.1 9.7 14.1 21.4 23.2 24.7 24.7 20.4 17.1 14.4 11.1 16.3 COOLING DEG. DAYS(BASE 21 0C) 0.0 0.0 0.0 1.0 27.0 73.5 115.5 116.0 17.5 5.0 0.0 0.0 355.5 HEATING DEG. DAYS(BASE 18 0C) 329.0 304.5 256.0 126.0 0.0 0.0 0.0 0.0 1.0 47.5 108.0 215.0 1387.0 DEWPOINT (MEAN C) 4.3 4.3 5.2 10.0 17.8 18.7 19.7 19.3 18.2 14.1 11.3 9.4 12.7 MIXING RATIO (G/KG) 5.34 5.28 5.57 7.82 12.96 13.83 14.51 14.31 13.12 10.06 8.51 7.41 9.89 VAPOUR PRESSURE (HPA) 8.68 8.59 9.02 12.59 20.62 21.95 23.01 22.73 20.94 16.25 13.73 11.97 15.84 SATURATION DEF. (HPA) 2.95 2.80 4.85 5.89 8.54 11.89 11.97 12.50 4.06 4.25 3.88 2.59 6.35 RELATIVE HUMIDITY (MEAN %) 79 80 72 73 74 68 69 68 86 82 80 85 76 RELATIVE HUMIDITY (MAX. %) 96 96 94 94 95 91 92 93 96 95 94 97 94 RELATIVE HUMIDITY (MIN. %) 62 63 55 56 60 56 57 55 78 69 65 72 62 RELATIVE HUMIDITY (MEAN% 03UTC) 95 91 94 92 95 91 91 92 95 95 94 96 93 RELATIVE HUMIDITY (MEAN% 09UTC) 71 74 61 64 64 60 61 58 79 74 70 78 68 RELATIVE HUMIDITY (MEAN% 15UTC) 77 77 69 70 71 64 65 65 87 83 81 86 75 RH=0 => RELATIVE HUMIDITY < 0.5% AMOUNT OF PRECIPITATION MM. 97.0 119.0 37.6 60.1 29.0 11.0 36.0 27.0 323.6 183.4 83.0 44.0 1050.7 DAYS WITH PRECIPITATION >=10 3 4 1 3 1 1 1 1 10 7 1 2 35 DAYS WITH PRECIPITATION >= 5 6 10 2 5 3 1 2 2 12 10 1 2 56 DAYS WITH PRECIPITATION >= 1 12 10 8 6 5 2 4 5 17 14 4 6 93 DAYS WITH PRECIPITATION 12 10 12 11 6 2 7 6 19 16 5 7 113 GREATEST DAILY PRECIPITATION 24.0 28.0 14.0 23.0 17.0 10.0 25.0 11.0 96.0 48.0 77.0 25.0 96.0 DAY 3 27 10 15 17