Station Name: BILMA WMO Station Number: 61017 National I.D. Number: Country: NIGER WMO Region: REGION I - AFRICA Latitude: 18d 41m N Longitude: 012d 55m E Elevation: 357 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 ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 17.0 Feb 20.0 Mar 24.3 Apr 29.2 May 32.3 Jun 33.3 Jul 33.3 Aug 33.0 Sep 31.3 Oct 27.6 Nov 21.9 Dec 18.1 Annual 26.8 Ann-NCDC 26.8 ------------------ Element 02: Maximum Dry Bulb Temperature (deg C) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 25.6 Feb 29.1 Mar 33.3 Apr 38.5 May 41.6 Jun 42.4 Jul 41.3 Aug 40.5 Sep 39.9 Oct 36.6 Nov 31.0 Dec 26.9 Annual 35.6 Ann-NCDC 35.6 ------------------ Element 02: Maximum Dry Bulb Temperature (deg C) Qualifier: 01: Mean Value MAX_VAL (Statistic 04): Maximum Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 30.7 Feb 34.8 Mar 39.4 Apr 42.5 May 44.5 Jun 45.1 Jul 43.6 Aug 43.0 Sep 42.0 Oct 39.9 Nov 35.0 Dec 31.8 Annual 39.3 Ann-NCDC NA ------------------ Element 03: Minimum Dry Bulb Temperature (deg C) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 8.4 Feb 10.7 Mar 15.3 Apr 19.9 May 23.0 Jun 24.3 Jul 25.3 Aug 25.5 Sep 22.7 Oct 18.6 Nov 12.6 Dec 9.3 Annual 18.0 Ann-NCDC 18.0 ------------------ Element 03: Minimum Dry Bulb Temperature (deg C) Qualifier: 01: Mean Value MIN_VAL (Statistic 05): Minimum Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 2.3 Feb 4.0 Mar 7.3 Apr 12.5 May 17.2 Jun 19.4 Jul 20.0 Aug 20.5 Sep 17.5 Oct 12.7 Nov 7.1 Dec 3.5 Annual 12.0 Ann-NCDC NA ------------------ Element 06: Precipitation (mm) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 0.1 Feb 0.0 Mar 0.0 Apr 0.0 May 0.0 Jun 1.7 Jul 2.2 Aug 7.1 Sep 1.0 Oct 0.2 Nov 0.0 Dec 0.0 Annual 11.5 Ann-NCDC 12.3 ------------------ Element 11: Relative Humidity (%) MNDLYMX (Statistic 09): Mean Daily Maximum Value MNDLYMI (Statistic 10): Mean Daily Minimum Value -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MNDLYMX MNDLYMI Month -------------------------- Jan 49 15 Feb 43 12 Mar 34 10 Apr 32 8 May 32 9 Jun 35 10 Jul 43 13 Aug 51 17 Sep 43 13 Oct 43 13 Nov 49 14 Dec 50 15 Annual 42 12 Ann-NCDC 42.0 12.4 -------------------------- Element 13: Station Pressure (hPa) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 974.9 Feb 973.4 Mar 970.9 Apr 968.3 May 967.9 Jun 968.4 Jul 967.8 Aug 968.1 Sep 969.6 Oct 971.2 Nov 973.5 Dec 974.5 Annual 970.8 Ann-NCDC 970.7 ------------------ Element 14: Vapor Pressure (hPa) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 5.2 Feb 5.0 Mar 5.5 Apr 6.8 May 8.1 Jun 9.7 Jul 12.3 Aug 14.5 Sep 10.8 Oct 8.8 Nov 6.9 Dec 5.6 Annual 8.1 Ann-NCDC 8.3 ------------------ Element 15: Sunshine Statistic 44: Mean Number of Hours Qualifier: 06: Mean Daily Value Qualifier: NCDC: Mean Monthly Value Computed by NCDC from Mean Daily Values Provided by Member -------------------------- byr: 1961 1961 eyr: 1990 1990 Qualifier: 06 NCDC Month -------------------------- Jan 9.5 294.5 Feb 9.9 277.2 Mar 9.7 300.7 Apr 10.0 300.0 May 10.3 319.3 Jun 10.6 318.0 Jul 10.5 325.5 Aug 10.3 319.3 Sep 10.2 306.0 Oct 10.2 316.2 Nov 10.1 303.0 Dec 9.5 294.5 Annual 10.1 3686.5 Ann-NCDC 10.1 3674.2 -------------------------- Element 16: Wind Speed (m/sec) Statistic 01: Mean Value Qualifier: ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 3.6 Feb 3.8 Mar 4.2 Apr 3.5 May 3.0 Jun 2.9 Jul 2.7 Aug 2.5 Sep 2.8 Oct 3.2 Nov 3.0 Dec 3.3 Annual 3.3 Ann-NCDC 3.2 ------------------