Station Name: Pretoria WMO Station Number: 68262 National I.D. Number: Country: SOUTH AFRICA WMO Region: REGION I - AFRICA Latitude: 25d 44m S Longitude: 028d 11m E Elevation: 1330 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) MNDLYMX (Statistic 09): Mean Daily Maximum Value MNDLYMI (Statistic 10): Mean Daily Minimum Value MN_HRLY (Statistic 69): Mean of Hourly Observations ---------------------------------- byr: 1961 1961 1961 eyr: 1990 1990 1990 Statistic: MNDLYMX MNDLYMI MN_HRLY Month ---------------------------------- Jan 28.5 17.8 22.6 Feb 28.0 17.3 22.1 Mar 26.9 16.1 21.0 Apr 24.1 12.6 17.9 May 21.8 8.2 14.7 Jun 18.9 4.8 11.5 Jul 19.5 4.8 11.9 Aug 22.1 7.6 14.7 Sep 25.5 11.9 18.6 Oct 26.6 14.4 20.1 Nov 27.0 15.8 21.0 Dec 28.0 16.8 21.9 Annual 24.7 12.3 18.2 Ann-NCDC 24.7 12.3 18.2 ---------------------------------- Element 02: Maximum Dry Bulb Temperature (deg C) MAX_VAL (Statistic 04): Maximum Value MNMLYMX (Statistic 18): Mean Monthly Maximum Value -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MAX_VAL MNMLYMX Month -------------------------- Jan 36.2 33.2 Feb 36.3 32.1 Mar 34.6 31.2 Apr 32.5 28.7 May 29.4 25.9 Jun 25.4 23.2 Jul 25.5 23.5 Aug 28.6 27.1 Sep 33.5 31.1 Oct 34.6 32.2 Nov 35.7 32.6 Dec 35.0 32.7 Annual 36.3 34.3 Ann-NCDC NA 29.5 -------------------------- Element 03: Minimum Dry Bulb Temperature (deg C) MIN_VAL (Statistic 05): Minimum Value MNMLYMI (Statistic 19): Mean Monthly Minimum Value -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MIN_VAL MNMLYMI Month -------------------------- Jan 10.9 14.1 Feb 11.0 13.7 Mar 5.5 11.8 Apr 3.5 7.6 May 0.7 3.7 Jun -1.4 0.7 Jul -0.6 0.9 Aug -1.2 2.7 Sep 2.3 5.8 Oct 3.6 8.9 Nov 6.6 10.9 Dec 6.5 12.9 Annual -1.4 0.1 Ann-NCDC NA 7.8 -------------------------- 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 135.0 39.2 62.0 103.9 137.0 184.6 490.1 Feb 76.0 15.7 34.6 57.7 74.0 95.5 218.3 Mar 79.0 16.9 45.2 58.3 82.8 121.8 173.4 Apr 54.0 0.4 14.9 34.4 61.6 90.2 145.0 May 13.0 0.0 0.2 3.7 7.9 18.8 59.7 Jun 7.0 0.0 0.0 0.0 2.1 12.8 55.5 Jul 3.0 0.0 0.0 0.0 0.3 5.2 19.9 Aug 5.0 0.0 0.0 0.9 4.4 9.4 29.8 Sep 20.0 0.0 0.3 12.7 20.6 33.5 75.4 Oct 7.0 10.0 33.0 56.0 76.0 107.0 158.0 Nov 10.0 18.0 56.0 80.0 103.0 165.0 188.0 Dec 108.0 33.6 69.3 88.6 106.4 144.0 198.8 Annual 673.0 371.8 563.9 622.7 707.5 804.9 913.1 Ann-NCDC 517.0 NA NA NA NA NA NA ------------------------------------------------------------------ Element 11: Relative Humidity (%) MN_HRLY (Statistic 69): Mean of Hourly Observations ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 62.0 Feb 63.0 Mar 63.0 Apr 63.0 May 56.0 Jun 54.0 Jul 50.0 Aug 45.0 Sep 44.0 Oct 52.0 Nov 59.0 Dec 61.0 Annual 56.0 Ann-NCDC 56.0 ------------------ Element 13: Station Pressure (hPa) MN_HRLY (Statistic 69): Mean of Hourly Observations ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 870.9 Feb 871.1 Mar 873.1 Apr 874.3 May 875.9 Jun 877.6 Jul 878.1 Aug 876.7 Sep 874.8 Oct 873.2 Nov 872.3 Dec 871.2 Annual 874.1 Ann-NCDC 874.1 ------------------ Element 14: Vapor Pressure (hPa) MN_HRLY (Statistic 69): Mean of Hourly Observations ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 16.4 Feb 16.4 Mar 15.3 Apr 12.6 May 8.9 Jun 6.9 Jul 6.6 Aug 7.2 Sep 9.0 Oct 11.8 Nov 14.3 Dec 15.6 Annual 11.7 Ann-NCDC 11.8 ------------------ Element 15: Sunshine MN_#HRS (Statistic 44): Mean Number of Hours ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 260.8 Feb 235.3 Mar 253.9 Apr 245.8 May 282.6 Jun 270.8 Jul 289.1 Aug 295.5 Sep 284.3 Oct 275.2 Nov 253.6 Dec 271.9 Annual 3218.8 Ann-NCDC 3218.8 ------------------ Element 95: Number Days with Precipitation GE Threshold (count) Qualifier: 1.0 mm MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 11.0 Feb 8.0 Mar 8.0 Apr 5.0 May 2.0 Jun 1.0 Jul 1.0 Aug 1.0 Sep 2.0 Oct 6.0 Nov 9.0 Dec 11.0 Annual 65.0 Ann-NCDC 65.0 ------------------