Station Name: London-Gatwick WMO Station Number: 03776 National I.D. Number: Country: UNITED KINGDOM OF GREAT BRITAIN & NORTHERN IRELAND WMO Region: REGION VI - EUROPE Latitude: 51d 09m N Longitude: 000d 11m W Elevation: 59 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 3.5 Feb 3.8 Mar 5.7 Apr 8.0 May 11.3 Jun 14.4 Jul 16.5 Aug 16.1 Sep 13.8 Oct 10.7 Nov 6.4 Dec 4.5 Annual 9.5 Ann-NCDC 9.6 ------------------ Element 02: Maximum Dry Bulb Temperature (deg C) MEAN (Statistic 01): Mean Value MAX_VAL (Statistic 04): Maximum Value -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MEAN MAX_VAL Month -------------------------- Jan 6.7 13.7 Feb 7.1 16.9 Mar 9.9 22.2 Apr 12.6 22.7 May 16.3 28.3 Jun 19.6 33.8 Jul 21.7 33.9 Aug 21.4 35.0 Sep 18.8 31.6 Oct 15.0 24.7 Nov 10.1 18.3 Dec 7.7 15.2 Annual 13.9 35.0 Ann-NCDC 13.9 NA -------------------------- Element 03: Minimum Dry Bulb Temperature (deg C) MEAN (Statistic 01): Mean Value MIN_VAL (Statistic 05): Minimum Value -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MEAN MIN_VAL Month -------------------------- Jan 0.4 -16.7 Feb 0.5 -14.5 Mar 1.5 -11.3 Apr 3.4 -5.7 May 6.3 -4.0 Jun 9.3 -1.6 Jul 11.3 2.8 Aug 10.9 1.6 Sep 8.8 -0.7 Oct 6.4 -4.7 Nov 2.8 -8.6 Dec 1.3 -12.0 Annual 5.2 -16.7 Ann-NCDC 5.2 NA -------------------------- Element 06: Precipitation (mm) MEANMLY (Statistic 15): Mean Monthly Value MIN_MLY (Statistic 20): Minimum Monthly Value QUIN20% (Statistic 22): First Quintile QUIN40% (Statistic 23): Second Quintile QUIN60% (Statistic 24): Third Quintile QUIN80% (Statistic 25): Fourth Quintile MAX_MLY (Statistic 26): Maximum Monthly Value ------------------------------------------------------------------ byr: 1961 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 1990 Statistic: MEANMLY MIN_MLY QUIN20% QUIN40% QUIN60% QUIN80% MAX_MLY Month ------------------------------------------------------------------ Jan 78.0 14.0 33.0 65.0 92.0 117.0 183.0 Feb 51.0 11.0 21.5 34.5 52.5 71.5 143.0 Mar 61.0 4.0 31.5 57.0 73.5 83.0 118.0 Apr 54.0 4.0 29.0 46.5 61.0 78.0 106.0 May 55.0 2.0 34.5 44.0 61.0 74.0 142.0 Jun 57.0 7.0 21.5 50.0 63.0 80.5 123.0 Jul 45.0 10.0 20.0 32.0 51.0 68.0 87.0 Aug 56.0 8.0 29.5 44.0 62.0 74.5 132.0 Sep 68.0 12.0 22.5 44.5 68.0 96.5 224.0 Oct 73.0 3.0 24.0 55.0 80.5 118.0 196.0 Nov 77.0 15.0 45.0 57.0 75.0 109.0 196.0 Dec 79.0 15.0 44.0 74.5 89.5 108.0 146.0 Annual 754.0 510.0 683.5 722.5 755.0 826.0 1060.0 Ann-NCDC 754.0 NA NA NA NA NA NA ------------------------------------------------------------------ Element 10: Snow Depth (cm) MN09LST (Statistic 79): Mean of Observations at 0900 LST ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 24.4 Feb 10.8 Mar 2.7 Apr 0.4 May 0.0 Jun 0.0 Jul 0.0 Aug 0.0 Sep 0.0 Oct 0.0 Nov 0.2 Dec 8.2 Annual 46.7 Ann-NCDC NA ------------------ 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 91.0 81.0 Feb 89.0 76.0 Mar 91.0 69.0 Apr 90.0 64.0 May 92.0 62.0 Jun 92.0 60.0 Jul 93.0 60.0 Aug 95.0 62.0 Sep 96.0 67.0 Oct 95.0 73.0 Nov 93.0 78.0 Dec 91.0 82.0 Annual 93.0 71.0 Ann-NCDC 92.3 69.5 -------------------------- Element 15: Sunshine MN_#HRS (Statistic 44): Mean Number of Hours ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 52.4 Feb 71.3 Mar 113.4 Apr 153.0 May 204.3 Jun 204.3 Jul 204.5 Aug 195.3 Sep 148.1 Oct 110.5 Nov 69.3 Dec 47.8 Annual 1574.2 Ann-NCDC 1574.2 ------------------ Element 16: Wind Speed (m/sec) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 4.4 Feb 4.3 Mar 4.3 Apr 4.1 May 3.9 Jun 3.5 Jul 3.4 Aug 3.3 Sep 3.3 Oct 3.3 Nov 3.9 Dec 4.1 Annual 3.8 Ann-NCDC 3.8 ------------------ Element 51: Number Days with Thunder (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 0.0 Feb 0.0 Mar 1.0 Apr 1.0 May 2.0 Jun 2.0 Jul 2.0 Aug 2.0 Sep 2.0 Oct 1.0 Nov 0.0 Dec 0.0 Annual 15.0 Ann-NCDC 13.0 ------------------ Element 53: Number Days with Hail (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 1.0 Feb 1.0 Mar 1.0 Apr 1.0 May 0.0 Jun 0.0 Jul 0.0 Aug 0.0 Sep 0.0 Oct 0.0 Nov 0.0 Dec 0.0 Annual 6.0 Ann-NCDC 4.0 ------------------ Element 56: Number Days with Snowfall (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 4.0 Feb 4.0 Mar 3.0 Apr 1.0 May 0.0 Jun 0.0 Jul 0.0 Aug 0.0 Sep 0.0 Oct 0.0 Nov 1.0 Dec 3.0 Annual 16.0 Ann-NCDC 16.0 ------------------ Element 57: Number Days with Snow on Ground (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 4.0 Feb 3.0 Mar 1.0 Apr 0.0 May 0.0 Jun 0.0 Jul 0.0 Aug 0.0 Sep 0.0 Oct 0.0 Nov 0.0 Dec 1.0 Annual 9.0 Ann-NCDC 9.0 ------------------ Element 76: Number Days with Air Frost (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 14.0 Feb 13.0 Mar 10.0 Apr 5.0 May 1.0 Jun 0.0 Jul 0.0 Aug 0.0 Sep 0.0 Oct 2.0 Nov 8.0 Dec 12.0 Annual 66.0 Ann-NCDC 65.0 ------------------ Element 77: Number Days with Grass Frost (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 18.0 Feb 17.0 Mar 18.0 Apr 13.0 May 6.0 Jun 1.0 Jul 0.0 Aug 0.0 Sep 2.0 Oct 7.0 Nov 14.0 Dec 17.0 Annual 115.0 Ann-NCDC 113.0 ------------------ Element 95: Number Days with Precipitation GE Threshold (count) Statistic 15: Mean Monthly Value Qualifier: 0.2 mm Qualifier: 1.0 mm Qualifier: 10.0 mm ---------------------------------- byr: 1961 1961 1961 eyr: 1990 1990 1990 Qualifier: 0.2 1.0 10.0 Month ---------------------------------- Jan 17.0 13.0 2.0 Feb 13.0 9.0 1.0 Mar 15.0 11.0 2.0 Apr 14.0 10.0 1.0 May 13.0 10.0 1.0 Jun 11.0 8.0 2.0 Jul 10.0 7.0 1.0 Aug 12.0 9.0 2.0 Sep 12.0 9.0 2.0 Oct 13.0 10.0 2.0 Nov 16.0 11.0 2.0 Dec 16.0 12.0 2.0 Annual 162.0 119.0 21.0 Ann-NCDC 162.0 119.0 20.0 ---------------------------------- Element AK: Number Days with Sleet/Snow (count) Statistic 15: Mean Monthly Value Qualifier: ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 6.0 Feb 5.0 Mar 4.0 Apr 2.0 May 0.0 Jun 0.0 Jul 0.0 Aug 0.0 Sep 0.0 Oct 0.0 Nov 2.0 Dec 4.0 Annual 23.0 Ann-NCDC 23.0 ------------------