December 1999
Date Time T RH Tmax Tmin T1 T10 T30 T50 MSLP Rain Gust Snow Weather
01/12/99 18 8.1 75 12.0 7.7 7.8 8.5 8.8 8.6 1023 1.2 14 0 Occasional rain overnight then mainly cloudy. 02/12/99 19 7.8 85 9.1 2.7 6.5 6.7 8.0 8.4 1023 0.2 14 0 Sunny periods. Increasing cloud. Occasional rain in evening. 03/12/99 18 5.8 61 12.2 5.4 6.0 7.5 8.2 8.4 1009 0.6 23 0 Cloudy with drizzle AM. Short burst of heavy rain around midday then sunny spells. 04/12/99 17 4.4 75 7.0 2.2 3.7 5.2 7.2 8.0 1010 0.0 16 0 Sunny AM. Sleet shower in afternoon. Fine evening. 05/12/99 16 3.7 74 6.9 0.0 2.8 3.9 6.1 7.2 1026 0.0 13 0 Mainly sunny. 06/12/99 18 11.5 86 11.5 2.0 8.2 7.5 7.0 7.3 1012 0.0 19 0 Cloudy. Occasional drizzle. 07/12/99 22 5.4 87 11.5 5.0 5.3 6.6 7.8 8.0 1011 2.0 17 0 Mainly cloudy with showers. 08/12/99 18 8.3 87 10.8 4.1 7.3 7.5 7.4 7.7 995 7.7 19 0 Cloudy with rain at times. clearer evening. 09/12/99 18 7.5 72 8.3 5.1 5.2 5.6 7.0 7.6 989 0.0 23 0 Sunny periods. Showers in evening. 10/12/99 18 5.5 81 7.7 2.8 4.7 5.3 6.6 7.3 999 0.2 15 0 Sunny periods AM then increasing cloud. Rain in evening. 11/12/99 18 9.7 89 12.0 4.5 7.5 7.5 7.5 7.5 987 6.1 19 0 Rain AM. Becoming dry in afternoon. 12/12/99 17 5.7 92 9.8 5.4 6.3 6.8 7.7 7.9 996 0.0 17 0 Dry early then occasional light rain. 13/12/99 18 3.1 84 7.4 1.9 4.3 5.3 6.6 7.3 996 3.7 14 0 Early sunthen rain. Cloudy in afternoon. Fine evening. 14/12/99 18 1.1 87 4.1 -0.5 2.4 3.7 5.8 6.8 999 0.0 14 0 Sunny periods. 15/12/99 18 1.3 84 3.0 -1.8 2.0 3.2 5.1 6.3 1020 0.2 13 0 Sleet shower overnight. Sunny spells. 16/12/99 20 3.7 88 6.8 -1.7 2.0 2.8 4.8 5.7 1024 0.0 13 0 Increasing cloud with sunny periods. 17/12/99 18 8.3 92 10.7 2.9 6.8 6.3 6.1 5.9 1009 3.8 20 0 Rain at times. 18/12/99 17 2.4 78 8.3 1.5 4.1 4.8 6.0 6.4 1013 0.0 8 0 Cloudy. Snow in evening. Snow started 1700. 1900 1cm. 2330 5cm. Ceased 0030. 19/12/99 18 -3.6 89 2.4 -4.0 1.2 2.5 5.0 5.9 1018 7.7 10 5 Sunny. 20/12/99 21 -1.8 94 -0.5 -8.6 0.4 1.6 4.0 5.3 1025 0.0 8 5 Sunny periods. Increasing cloud. 21/12/99 18 4.0 95 4.0 -2.4 1.0 1.4 4.0 4.8 1021 1.8 13 1 Light rain early. Cloudy PM. Thaw. 22/12/99 20 9.7 93 11.4 3.3 6.1 5.4 4.6 5.1 1008 3.1 9 0 Cloudy. Rain in afternoon and evening. 23/12/99 21 9.0 89 10.1 4.3 6.0 5.5 5.5 5.6 1009 12.3 12 0 Early sun then showers. Rain in evening. 24/12/99 18 11.3 93 11.3 8.4 8.7 7.6 6.8 6.3 986 22.1 22 0 Rain at times. Very squally in evening with hail showers. 25/12/99 18 4.1 78 11.3 1.7 4.1 5.3 6.6 6.7 992 12.4 28 0 Cloudy with spell of rain and sleet AM turning to snow for a while. Rain showers PM. 26/12/99 18 2.8 92 7.7 2.4 4.0 4.8 5.9 6.4 984 11.0 14 0 Rain overnight. Early sun. Rain and sleet in afternoon. 27/12/99 21 2.4 95 3.8 1.2 3.0 3.7 5.2 5.7 987 0.8 15 0 Cloudy. 28/12/99 20 -0.2 95 3.6 -0.7 2.1 3.4 5.0 5.5 1009 0.4 15 0 Cloudy with occasional light rain. 29/12/99 22 -0.3 95 5.3 -2.8 1.0 2.2 4.1 5.2 1022 0.1 4 0 Sunny periods. Light showers AM. 30/12/99 22 7.7 95 7.7 -1.5 4.4 3.8 4.0 4.8 1013 0.0 5 0 Occasional light rain. 31/12/99 19 6.3 97 7.4 4.2 5.1 4.8 5.0 5.2 1019 0.1 7 0 Cloudy with occasional light rain.
Summary
Highest day max 12.2 3rd Lowest day max -0.5 20th Lowest night min -8.6 20th Highest night min 8.4 24th Mean day max 7.9 Mean night min 1.8 Mean temperature 4.9
Total rainfall 97.6 Highest daily total 22.1 24th No. rain days (>= 0.2) 19 No. wet days (>= 1.0) 13
Mean pressure 1008 Highest value read 1026 5th Lowest value read 984 26th
Mean RH 86%
Mean 10 cm earth temperature 5.1 Mean 30 cm earth temperature 6.1 Mean 50 cm earth temperature 6.6
No. days with air frost 9 No. days with thunder 0 No. days with snow falling 2 No. days with snow lying 3 No. days with sleet 4 No. days with hail < 0.5 cm 1 No. days with hail >=0.5 cm 0
Max. gust (corrected to 10m) 37 knots 24th
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