Station Name: ZANJAN WMO Station Number: 40729 National I.D. Number: Country: IRAN, ISLAMIC REPUBLIC OF WMO Region: REGION II - ASIA Latitude: 36d 41m N Longitude: 048d 27m E Elevation: 1620 m In the following tables, byr = beginning year of normals or extremes data period eyr = ending year of normals or extremes data period NA = Not Applicable, data not submitted or not computed * = value > 0 but < units resolution Ann-NCDC = annual value computed by NCDC from monthly values provided by Members ========================================================== The normals data and climate variable descriptions are presented in these tables as provided by the WMO Member country. ========================================================== Element 01: Dry Bulb Temperature (deg C) MEAN (Statistic 01): Mean Value MEANDLY (Statistic 06): Mean Daily Value SD_DLY (Statistic 08): Standard Deviation of Mean Daily Value MNDLYMX (Statistic 09): Mean Daily Maximum Value MNDLYMI (Statistic 10): Mean Daily Minimum Value -------------------------------------------------- byr: 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 Statistic: MEAN MEANDLY SD_DLY MNDLYMX MNDLYMI Month -------------------------------------------------- Jan -3.0 -3.0 3.80 2.1 -8.1 Feb -0.8 -1.0 3.66 4.3 -6.4 Mar 4.9 4.5 2.09 10.3 -1.2 Apr 11.0 10.3 1.59 17.0 3.7 May 16.4 15.2 1.49 22.8 7.6 Jun 21.7 20.0 1.17 28.8 11.2 Jul 25.2 23.6 1.28 32.2 14.9 Aug 24.4 22.9 1.12 31.6 14.2 Sep 20.3 19.0 1.00 28.1 9.9 Oct 13.5 12.9 1.46 20.3 5.5 Nov 6.8 6.7 1.93 12.7 0.7 Dec 0.4 0.5 3.07 5.5 -4.4 Annual 11.7 11.0 1.97 18.0 4.0 Ann-NCDC 11.7 11.0 NA 18.0 4.0 -------------------------------------------------- Element 02: Maximum Dry Bulb Temperature (deg C) MAX_VAL (Statistic 04): Maximum Value DATEMAX (Statistic 12): Date (Year/Day) of Occurrence of Maximum Daily Value -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MAX_VAL DATEMAX Month -------------------------- Jan 17.0 196607 Feb 22.0 196626 Mar 25.0 196224 Apr 27.0 197014 May 32.0 197530 Jun 38.0 197529 Jul 40.0 197630 Aug 39.4 198313 Sep 35.0 196403 Oct 30.0 197202 Nov 23.0 196701 Dec 18.0 198006 Annual 40.0 NA Ann-NCDC NA NA -------------------------- Element 03: Minimum Dry Bulb Temperature (deg C) MIN_VAL (Statistic 05): Minimum Value DATEMIN (Statistic 14): Date (Year/Day) of Occurrence of Minimum Daily Value -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MIN_VAL DATEMIN Month -------------------------- Jan -30.0 196412 Feb -28.6 198917 Mar -19.6 198502 Apr -8.0 196701 May -5.0 198402 Jun 2.0 196706 Jul 7.0 196813 Aug 6.0 197228 Sep 0.0 198921 Oct -6.0 197724 Nov -14.0 196428 Dec -24.0 197227 Annual -30.0 NA Ann-NCDC NA NA -------------------------- Element 05: Dew Point Temperature (deg C) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan -7.7 Feb -6.3 Mar -3.0 Apr 0.8 May 4.1 Jun 6.0 Jul 8.7 Aug 8.0 Sep 4.2 Oct 1.7 Nov -1.7 Dec -5.4 Annual 0.8 Ann-NCDC .8 ------------------ Element 06: Precipitation (mm) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 33.5 Feb 30.0 Mar 45.7 Apr 56.5 May 46.2 Jun 7.3 Jul 4.6 Aug 3.4 Sep 4.2 Oct 26.0 Nov 28.8 Dec 29.2 Annual 315.4 Ann-NCDC 315.4 ------------------ Element 08: Maximum 24-Hour Precipitation (mm) MAX_VAL (Statistic 04): Maximum Value DATEMAX (Statistic 12): Date (Year/Day) of Occurrence of Maximum Daily Value -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MAX_VAL DATEMAX Month -------------------------- Jan 26.0 197923 Feb 40.0 197113 Mar 29.0 197927 Apr 38.0 198423 May 50.6 196825 Jun 13.0 197702 Jul 20.0 197417 Aug 14.0 196609 Sep 26.0 196530 Oct 31.0 198708 Nov 38.0 196303 Dec 22.0 197013 Annual 50.6 NA Ann-NCDC NA NA -------------------------- Element 11: Relative Humidity (%) MEAN (Statistic 01): Mean Value MNDLYMX (Statistic 09): Mean Daily Maximum Value MNDLYMI (Statistic 10): Mean Daily Minimum Value ---------------------------------- byr: 1961 1961 1961 eyr: 1990 1990 1990 Statistic: MEAN MNDLYMX MNDLYMI Month ---------------------------------- Jan 72.0 85.0 57.0 Feb 69.0 84.0 54.0 Mar 61.0 82.0 43.0 Apr 54.0 78.0 37.0 May 49.0 75.0 31.0 Jun 40.0 64.0 25.0 Jul 38.0 59.0 26.0 Aug 39.0 60.0 26.0 Sep 38.0 59.0 24.0 Oct 49.0 70.0 33.0 Nov 59.0 77.0 41.0 Dec 68.0 83.0 52.0 Annual 53.0 73.0 37.0 Ann-NCDC 53.0 73.0 37.4 ---------------------------------- Element 12: Sea Level Pressure (hPa) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 1018.9 Feb 1016.7 Mar 1011.8 Apr 1007.6 May 1005.7 Jun 1000.0 Jul 996.3 Aug 998.1 Sep 1004.9 Oct 1011.8 Nov 1015.7 Dec 1017.9 Annual 1008.8 Ann-NCDC 1008.8 ------------------ Element 13: Station Pressure (hPa) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 833.6 Feb 832.5 Mar 831.7 Apr 832.0 May 833.1 Jun 831.2 Jul 830.3 Aug 831.5 Sep 834.7 Oct 836.9 Nov 836.4 Dec 834.4 Annual 833.2 Ann-NCDC 833.2 ------------------ Element 14: Vapor Pressure (hPa) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 3.71 Feb 4.11 Mar 5.11 Apr 6.72 May 8.45 Jun 9.63 Jul 11.54 Aug 11.06 Sep 8.55 Oct 7.17 Nov 5.64 Dec 4.30 Annual 7.17 Ann-NCDC 7.2 ------------------ Element 15: Sunshine MN_#HRS (Statistic 44): Mean Number of Hours ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 150.1 Feb 139.3 Mar 172.5 Apr 213.3 May 267.2 Jun 328.9 Jul 334.5 Aug 317.3 Sep 295.8 Oct 229.3 Nov 164.7 Dec 137.0 Annual 2749.9 Ann-NCDC 2749.9 ------------------ Element 16: Wind Speed (m/sec) MEAN (Statistic 01): Mean Value MAXGUST (Statistic 30): Maximum Gust VECTOR (Statistic 42): Vector ---------------------------------- byr: 1961 1961 1961 eyr: 1990 1990 1990 Statistic: MEAN MAXGUST VECTOR Month ---------------------------------- Jan 1.5 20.1 .5 Feb 1.7 20.1 .5 Mar 2.1 27.8 .5 Apr 2.1 23.2 .7 May 1.7 26.3 .5 Jun 1.6 14.9 .2 Jul 1.8 20.1 .9 Aug 1.7 17.0 1.0 Sep 1.3 13.9 .4 Oct 1.2 14.9 .3 Nov 1.2 13.9 .4 Dec 1.3 18.0 .5 Annual 1.6 27.8 .4 Ann-NCDC 1.6 NA NA ---------------------------------- Element 17: Wind Direction (degrees) MAXGUST (Statistic 30): Maximum Gust PREVAIL (Statistic 41): Prevailing VECTOR (Statistic 42): Vector ---------------------------------- byr: 1961 1961 1961 eyr: 1990 1990 1990 Statistic: MAXGUST PREVAIL VECTOR Month ---------------------------------- Jan 90.0 90.0 142.0 Feb 180.0 90.0 168.0 Mar 240.0 225.0 198.0 Apr 210.0 225.0 232.0 May 320.0 225.0 231.0 Jun 240.0 270.0 172.0 Jul 50.0 90.0 99.0 Aug 60.0 135.0 104.0 Sep 260.0 90.0 135.0 Oct 50.0 90.0 178.0 Nov 240.0 90.0 168.0 Dec 60.0 90.0 148.0 Annual 240.0 90.0 155.0 Ann-NCDC NA NA NA ---------------------------------- Element 17: Wind Direction (degrees) Qualifier: 41: Prevailing MEAN% (Statistic 57): Mean Percent ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 15.1 Feb 13.5 Mar 11.7 Apr 12.7 May 11.0 Jun 9.4 Jul 14.4 Aug 14.4 Sep 11.0 Oct 11.5 Nov 12.0 Dec 12.6 Annual 11.6 Ann-NCDC NA ------------------ Element 18: Wind Steadiness (unitless) MEAN% (Statistic 57): Mean Percent ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 34.5 Feb 30.3 Mar 24.4 Apr 31.7 May 27.3 Jun 12.5 Jul 51.4 Aug 57.6 Sep 28.0 Oct 20.8 Nov 30.4 Dec 34.6 Annual 22.6 Ann-NCDC NA ------------------ Element 48: Calm Winds MEAN% (Statistic 57): Mean Percent ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 55.2 Feb 50.6 Mar 45.5 Apr 45.8 May 50.5 Jun 51.4 Jul 50.3 Aug 52.0 Sep 57.1 Oct 59.2 Nov 60.1 Dec 58.2 Annual 53.0 Ann-NCDC NA ------------------ Element 51: Number Days with Thunder (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 0.0 Feb 0.1 Mar 0.8 Apr 2.4 May 4.6 Jun 1.9 Jul 0.9 Aug 1.2 Sep 0.7 Oct 1.4 Nov 0.4 Dec 0.1 Annual 14.5 Ann-NCDC 14.5 ------------------ Element 56: Number Days with Snowfall (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 9.5 Feb 7.4 Mar 5.1 Apr 1.0 May 0.0 Jun 0.0 Jul 0.0 Aug 0.0 Sep 0.0 Oct 0.1 Nov 1.8 Dec 6.2 Annual 31.1 Ann-NCDC 31.1 ------------------ Element 62: Number Days with Dust (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 0.2 Feb 0.1 Mar 0.4 Apr 0.6 May 0.7 Jun 0.8 Jul 0.7 Aug 0.9 Sep 0.6 Oct 0.5 Nov 0.1 Dec 0.1 Annual 5.7 Ann-NCDC 5.7 ------------------ Element 85: Number Days Minimum Temperature LE Threshold (count) Qualifier: 0.0 deg C MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 28.9 Feb 25.5 Mar 19.6 Apr 6.4 May 0.3 Jun 0.0 Jul 0.0 Aug 0.0 Sep 0.0 Oct 2.5 Nov 13.7 Dec 25.4 Annual 122.3 Ann-NCDC 122.3 ------------------ Element 95: Number Days with Precipitation GE Threshold (count) Statistic 15: Mean Monthly Value Qualifier: 1.0 mm Qualifier: 5.0 mm Qualifier: 10.0 mm ---------------------------------- byr: 1961 1961 1961 eyr: 1990 1990 1990 Qualifier: 1.0 5.0 10.0 Month ---------------------------------- Jan 7.1 2.5 0.9 Feb 6.4 2.3 0.6 Mar 8.7 3.1 1.3 Apr 8.6 4.0 2.0 May 7.6 3.2 1.5 Jun 1.7 0.6 0.2 Jul 1.1 0.3 0.1 Aug 1.0 0.3 0.0 Sep 1.0 0.2 0.1 Oct 4.2 1.9 0.7 Nov 4.9 2.2 0.9 Dec 6.1 2.1 0.8 Annual 58.4 22.7 9.1 Ann-NCDC 58.4 22.7 9.1 ---------------------------------- Element BT: Number Days with Occurrence of Rain (count) Statistic 15: Mean Monthly Value Qualifier: ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 10.7 Feb 9.4 Mar 12.5 Apr 12.3 May 11.1 Jun 3.3 Jul 2.1 Aug 2.3 Sep 1.7 Oct 6.5 Nov 7.3 Dec 9.6 Annual 88.8 Ann-NCDC 88.8 ------------------