Station Name: MAASTRICHT WMO Station Number: 06380 National I.D. Number: Country: NETHERLANDS WMO Region: REGION VI - EUROPE Latitude: 50d 55m N Longitude: 005d 46m E Elevation: 114 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 2.0 Feb 2.5 Mar 5.2 Apr 8.2 May 12.5 Jun 15.5 Jul 17.2 Aug 17.0 Sep 14.2 Oct 10.5 Nov 5.8 Dec 3.0 Annual 9.5 Ann-NCDC 9.5 ------------------ Element 02: Maximum Dry Bulb Temperature (deg C) MEAN (Statistic 01): Mean Value MAX_VAL (Statistic 04): Maximum Value MNMLYMX (Statistic 18): Mean Monthly Maximum Value ---------------------------------- byr: 1961 1961 1961 eyr: 1990 1990 1990 Statistic: MEAN MAX_VAL MNMLYMX Month ---------------------------------- Jan 4.4 14.8 10.8 Feb 5.5 19.1 11.8 Mar 8.9 23.4 16.7 Apr 12.6 29.7 21.2 May 17.3 30.6 25.2 Jun 20.3 33.8 28.7 Jul 21.9 35.9 30.7 Aug 21.9 35.9 30.1 Sep 18.8 31.3 26.2 Oct 14.5 26.3 22.2 Nov 8.6 20.3 15.7 Dec 5.4 16.4 12.3 Annual 13.3 35.9 21.0 Ann-NCDC 13.3 NA 21.0 ---------------------------------- Element 03: Minimum Dry Bulb Temperature (deg C) MEAN (Statistic 01): Mean Value MIN_VAL (Statistic 05): Minimum Value MNMLYMI (Statistic 19): Mean Monthly Minimum Value ---------------------------------- byr: 1961 1961 1961 eyr: 1990 1990 1990 Statistic: MEAN MIN_VAL MNMLYMI Month ---------------------------------- Jan -0.6 -19.3 -9.3 Feb -0.5 -14.8 -6.9 Mar 1.6 -12.9 -4.4 Apr 3.8 -4.9 -1.5 May 7.6 -1.0 2.0 Jun 10.7 0.9 5.5 Jul 12.4 4.3 7.5 Aug 12.3 5.4 7.5 Sep 9.9 1.6 4.7 Oct 6.8 -3.8 0.4 Nov 2.8 -8.6 -3.9 Dec 0.4 -15.4 -7.6 Annual 5.6 -19.3 -0.5 Ann-NCDC 5.6 NA -0.5 ---------------------------------- Element 05: Dew Point Temperature (deg C) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 0.1 Feb -0.1 Mar 1.8 Apr 3.8 May 7.5 Jun 10.7 Jul 12.3 Aug 12.5 Sep 10.8 Oct 7.8 Nov 3.7 Dec 1.2 Annual 6.0 Ann-NCDC 6.0 ------------------ 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 58.9 21.9 39.0 50.5 61.0 83.5 109.0 Feb 53.2 5.9 26.5 39.5 58.5 81.5 119.0 Mar 62.2 20.9 39.0 52.0 62.0 92.0 129.0 Apr 52.6 4.9 24.0 45.0 57.5 80.0 115.0 May 62.2 15.9 35.0 52.5 64.5 83.5 172.0 Jun 74.1 8.9 48.5 59.5 69.0 112.0 145.0 Jul 70.6 24.9 37.5 60.0 68.5 97.5 162.0 Aug 66.4 17.9 40.0 59.5 68.0 93.0 132.0 Sep 56.6 11.9 33.5 43.0 59.5 83.0 144.0 Oct 60.5 7.9 30.0 43.5 64.5 91.0 149.0 Nov 69.4 23.9 45.5 57.5 79.0 94.5 111.0 Dec 72.8 16.9 31.5 59.5 85.0 108.5 159.0 Annual 759.4 NA NA NA NA NA NA Ann-NCDC 759.5 NA NA NA NA 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 88.0 95.0 77.0 Feb 84.0 94.0 70.0 Mar 80.0 94.0 62.0 Apr 76.0 93.0 55.0 May 75.0 93.0 53.0 Jun 76.0 94.0 54.0 Jul 76.0 94.0 55.0 Aug 77.0 95.0 55.0 Sep 81.0 96.0 61.0 Oct 84.0 96.0 67.0 Nov 87.0 96.0 74.0 Dec 89.0 96.0 78.0 Annual 81.0 95.0 63.0 Ann-NCDC 81.1 94.7 63.4 ---------------------------------- Element 12: Sea Level Pressure (hPa) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 1016.3 Feb 1015.9 Mar 1015.1 Apr 1014.3 May 1014.9 Jun 1016.3 Jul 1016.9 Aug 1016.1 Sep 1017.1 Oct 1016.7 Nov 1015.2 Dec 1015.9 Annual 1015.9 Ann-NCDC 1015.9 ------------------ Element 14: Vapor Pressure (hPa) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 6.5 Feb 6.4 Mar 7.3 Apr 8.4 May 10.8 Jun 13.4 Jul 14.9 Aug 15.0 Sep 13.3 Oct 10.9 Nov 8.2 Dec 7.0 Annual 10.2 Ann-NCDC 10.2 ------------------ Element 15: Sunshine MN_#HRS (Statistic 44): Mean Number of Hours ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 42.3 Feb 71.4 Mar 97.9 Apr 140.6 May 186.9 Jun 176.4 Jul 182.8 Aug 175.3 Sep 134.3 Oct 107.7 Nov 57.5 Dec 38.0 Annual 1410.9 Ann-NCDC 1411.1 ------------------ Element 16: Wind Speed (m/sec) MEAN (Statistic 01): Mean Value VECTOR (Statistic 42): Vector -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: MEAN VECTOR Month -------------------------- Jan 5.2 2.8 Feb 4.6 1.3 Mar 4.8 2.0 Apr 4.3 .9 May 3.9 .8 Jun 3.5 1.2 Jul 3.5 1.5 Aug 3.5 1.5 Sep 3.9 2.1 Oct 4.2 2.2 Nov 4.7 2.7 Dec 4.9 2.8 Annual 4.2 1.8 Ann-NCDC 4.3 NA -------------------------- Element 17: Wind Direction (degrees) Statistic 38: Frequency Qualifier: 000.0 degrees Qualifier: 010.0 degrees Qualifier: 020.0 degrees Qualifier: 030.0 degrees Qualifier: 040.0 degrees Qualifier: 050.0 degrees Qualifier: 060.0 degrees Qualifier: 070.0 degrees Qualifier: 080.0 degrees ---------------------------------------------------------------------------------- byr: 1961 1961 1961 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 1990 1990 1990 Qualifier: 000.0 010.0 020.0 030.0 040.0 050.0 060.0 070.0 080.0 Month ---------------------------------------------------------------------------------- Jan .018 .005 .008 .015 .023 .024 .024 .020 .025 Feb .022 .010 .019 .029 .035 .040 .041 .037 .037 Mar .019 .010 .016 .024 .028 .031 .026 .022 .025 Apr .028 .019 .028 .037 .042 .044 .033 .022 .019 May .029 .015 .019 .029 .034 .039 .029 .028 .027 Jun .036 .019 .019 .028 .030 .036 .029 .023 .017 Jul .033 .015 .017 .021 .027 .027 .022 .017 .018 Aug .038 .011 .018 .024 .026 .026 .024 .022 .021 Sep .035 .010 .014 .021 .026 .024 .023 .018 .017 Oct .028 .006 .008 .013 .020 .021 .027 .029 .033 Nov .022 .006 .008 .015 .021 .025 .024 .021 .021 Dec .023 .005 .008 .015 .022 .023 .026 .027 .025 Annual .028 .011 .015 .023 .028 .030 .027 .024 .024 Ann-NCDC NA NA NA NA NA NA NA NA NA ---------------------------------------------------------------------------------- Element 17: Wind Direction (degrees) Statistic 38: Frequency Qualifier: 090.0 degrees Qualifier: 100.0 degrees Qualifier: 110.0 degrees Qualifier: 120.0 degrees Qualifier: 130.0 degrees Qualifier: 140.0 degrees Qualifier: 150.0 degrees Qualifier: 160.0 degrees Qualifier: 170.0 degrees ---------------------------------------------------------------------------------- byr: 1961 1961 1961 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 1990 1990 1990 Qualifier: 090.0 100.0 110.0 120.0 130.0 140.0 150.0 160.0 170.0 Month ---------------------------------------------------------------------------------- Jan .025 .018 .013 .012 .010 .011 .011 .019 .027 Feb .035 .026 .016 .012 .009 .010 .012 .018 .025 Mar .026 .019 .013 .010 .009 .010 .012 .016 .025 Apr .019 .014 .012 .011 .011 .009 .012 .016 .020 May .028 .022 .016 .013 .012 .013 .014 .015 .022 Jun .017 .012 .009 .007 .006 .007 .008 .010 .015 Jul .015 .011 .009 .008 .007 .008 .009 .011 .015 Aug .019 .013 .012 .011 .009 .010 .009 .014 .023 Sep .017 .015 .014 .012 .010 .012 .014 .019 .028 Oct .034 .023 .016 .012 .012 .014 .015 .019 .031 Nov .021 .017 .012 .011 .009 .011 .012 .015 .025 Dec .024 .018 .013 .010 .008 .007 .010 .015 .019 Annual .023 .017 .013 .011 .009 .010 .012 .016 .023 Ann-NCDC NA NA NA NA NA NA NA NA NA ---------------------------------------------------------------------------------- Element 17: Wind Direction (degrees) Statistic 38: Frequency Qualifier: 180.0 degrees Qualifier: 190.0 degrees Qualifier: 200.0 degrees Qualifier: 210.0 degrees Qualifier: 220.0 degrees Qualifier: 230.0 degrees Qualifier: 240.0 degrees Qualifier: 250.0 degrees Qualifier: 260.0 degrees ---------------------------------------------------------------------------------- byr: 1961 1961 1961 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 1990 1990 1990 Qualifier: 180.0 190.0 200.0 210.0 220.0 230.0 240.0 250.0 260.0 Month ---------------------------------------------------------------------------------- Jan .036 .058 .090 .093 .084 .083 .063 .044 .038 Feb .030 .042 .059 .060 .061 .059 .050 .037 .029 Mar .032 .044 .065 .067 .065 .071 .068 .049 .038 Apr .027 .031 .046 .050 .052 .052 .049 .041 .031 May .028 .039 .050 .052 .051 .053 .056 .047 .031 Jun .023 .034 .048 .056 .057 .064 .067 .052 .041 Jul .023 .029 .050 .054 .059 .072 .072 .063 .048 Aug .031 .041 .060 .066 .069 .068 .068 .050 .040 Sep .040 .059 .079 .077 .078 .076 .067 .042 .031 Oct .045 .066 .087 .085 .078 .070 .056 .038 .027 Nov .035 .055 .094 .103 .099 .085 .064 .043 .035 Dec .027 .045 .086 .105 .100 .087 .073 .048 .034 Annual .032 .045 .068 .072 .071 .070 .063 .046 .035 Ann-NCDC NA NA NA NA NA NA NA NA NA ---------------------------------------------------------------------------------- Element 17: Wind Direction (degrees) Statistic 38: Frequency Qualifier: 270.0 degrees Qualifier: 280.0 degrees Qualifier: 290.0 degrees Qualifier: 300.0 degrees Qualifier: 310.0 degrees Qualifier: 320.0 degrees Qualifier: 330.0 degrees Qualifier: 340.0 degrees Qualifier: 350.0 degrees ---------------------------------------------------------------------------------- byr: 1961 1961 1961 1961 1961 1961 1961 1961 1961 eyr: 1990 1990 1990 1990 1990 1990 1990 1990 1990 Qualifier: 270.0 280.0 290.0 300.0 310.0 320.0 330.0 340.0 350.0 Month ---------------------------------------------------------------------------------- Jan .025 .019 .014 .010 .005 .005 .004 .005 .006 Feb .024 .020 .015 .014 .011 .009 .009 .011 .011 Mar .028 .024 .016 .015 .013 .012 .010 .012 .013 Apr .029 .026 .023 .020 .020 .018 .019 .020 .024 May .025 .021 .020 .017 .016 .016 .016 .017 .019 Jun .033 .027 .025 .021 .020 .016 .019 .020 .021 Jul .037 .030 .028 .023 .021 .020 .021 .020 .018 Aug .030 .024 .019 .018 .016 .015 .016 .014 .014 Sep .021 .016 .012 .011 .011 .010 .010 .008 .011 Oct .019 .012 .009 .009 .008 .006 .006 .006 .006 Nov .022 .015 .011 .008 .006 .006 .005 .006 .007 Dec .023 .018 .011 .008 .007 .005 .005 .006 .006 Annual .026 .021 .017 .014 .013 .012 .012 .012 .013 Ann-NCDC NA NA NA NA NA NA NA NA NA ---------------------------------------------------------------------------------- Element 17: Wind Direction (degrees) Statistic 38: Frequency Qualifier: 360.0 degrees ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan .007 Feb .014 Mar .016 Apr .027 May .022 Jun .025 Jul .020 Aug .015 Sep .012 Oct .007 Nov .006 Dec .007 Annual .015 Ann-NCDC NA ------------------ Element 17: Wind Direction (degrees) PREVAIL (Statistic 41): Prevailing VECTOR (Statistic 42): Vector -------------------------- byr: 1961 1961 eyr: 1990 1990 Statistic: PREVAIL VECTOR Month -------------------------- Jan 210.0 214.0 Feb 220.0 208.0 Mar 230.0 223.0 Apr 230.0 253.0 May 240.0 228.0 Jun 240.0 248.0 Jul 230.0 246.0 Aug 220.0 230.0 Sep 200.0 217.0 Oct 200.0 206.0 Nov 210.0 214.0 Dec 210.0 218.0 Annual 210.0 222.0 Ann-NCDC NA NA -------------------------- Element 18: Wind Steadiness (unitless) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 53.8 Feb 28.3 Mar 41.7 Apr 20.9 May 20.5 Jun 34.3 Jul 42.9 Aug 42.9 Sep 53.8 Oct 52.4 Nov 57.4 Dec 57.1 Annual 42.9 Ann-NCDC NA ------------------ Element 20: Sky Cover (Cloud Cover) (okta) MEAN (Statistic 01): Mean Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan 6.0 Feb 6.0 Mar 6.0 Apr 5.0 May 5.0 Jun 5.0 Jul 5.0 Aug 5.0 Sep 5.0 Oct 5.0 Nov 6.0 Dec 6.0 Annual 5.0 Ann-NCDC 5.4 ------------------ Element 21: Pan Evaporation (mm) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1965 eyr: 1990 Month ------------------ Jan 8.6 Feb 16.2 Mar 32.4 Apr 54.7 May 83.8 Jun 88.1 Jul 92.5 Aug 80.3 Sep 51.9 Oct 30.1 Nov 12.4 Dec 7.0 Annual 558.0 Ann-NCDC 558.0 ------------------ Element 33: Global Solar Radiation (MJ/m2) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1965 eyr: 1990 Month ------------------ Jan 76.59 Feb 142.04 Mar 254.37 Apr 390.60 May 528.87 Jun 521.29 Jul 528.47 Aug 462.30 Sep 319.52 Oct 202.46 Nov 96.82 Dec 59.53 Annual 582.86 Ann-NCDC NA ------------------ Element 51: Number Days with Thunder (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1971 eyr: 1990 Month ------------------ Jan * Feb 1.0 Mar 1.0 Apr 1.0 May 4.0 Jun 6.0 Jul 4.0 Aug 4.0 Sep 2.0 Oct 1.0 Nov * Dec * Annual 23.0 Ann-NCDC 24.0 ------------------ Element 53: Number Days with Hail (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1971 eyr: 1990 Month ------------------ Jan 2.0 Feb 2.0 Mar 2.0 Apr 2.0 May 1.0 Jun * Jul * Aug * Sep * Oct 1.0 Nov 1.0 Dec 1.0 Annual 12.0 Ann-NCDC 12.0 ------------------ Element 56: Number Days with Snowfall (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1971 eyr: 1990 Month ------------------ Jan 9.0 Feb 7.0 Mar 6.0 Apr 3.0 May * Jun 0.0 Jul 0.0 Aug 0.0 Sep 0.0 Oct * Nov 4.0 Dec 6.0 Annual 35.0 Ann-NCDC 35.0 ------------------ Element 75: Number Days with Rime/Glaze Ice (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1971 eyr: 1990 Month ------------------ Jan 1.0 Feb 1.0 Mar * Apr 0.0 May 0.0 Jun 0.0 Jul 0.0 Aug 0.0 Sep 0.0 Oct 0.0 Nov 1.0 Dec 1.0 Annual 3.0 Ann-NCDC 4.0 ------------------ Element 82: Number Days with Gale Force Winds (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1961 eyr: 1990 Month ------------------ Jan * Feb * Mar * Apr * May 0.0 Jun 0.0 Jul 0.0 Aug 0.0 Sep * Oct 0.0 Nov * Dec * Annual * Ann-NCDC * ------------------ 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 13.0 Feb 10.0 Mar 12.0 Apr 11.0 May 11.0 Jun 11.0 Jul 10.0 Aug 10.0 Sep 9.0 Oct 9.0 Nov 12.0 Dec 13.0 Annual 130.0 Ann-NCDC 131.0 ------------------ Element BJ: Number Days with Fog (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1971 eyr: 1990 Month ------------------ Jan 6.0 Feb 5.0 Mar 5.0 Apr 4.0 May 3.0 Jun 3.0 Jul 2.0 Aug 4.0 Sep 5.0 Oct 6.0 Nov 6.0 Dec 7.0 Annual 54.0 Ann-NCDC 56.0 ------------------ Element BT: Number Days with Occurrence of Rain (count) MEANMLY (Statistic 15): Mean Monthly Value ------------------ byr: 1971 eyr: 1990 Month ------------------ Jan 20.0 Feb 14.0 Mar 20.0 Apr 18.0 May 19.0 Jun 20.0 Jul 17.0 Aug 17.0 Sep 17.0 Oct 18.0 Nov 20.0 Dec 20.0 Annual 221.0 Ann-NCDC 220.0 ------------------