Sunday 21st December
Saturday was a pleasant day, with sunshine, that lifted the thermometer to 9.4C at 12.53, also we had the equal highest UV light this month at 0.6. Light rain and drizzle arrived just after 22.00, with the two light showers around 01.00 and just before 06.00. Instead of dropping, as is usual at night, once again the thermometer slowly rose after 22.00 with the arrival of the thicker cloud that brought the light precipitation. By 08.00 the thermometer read 7.8C, which was above the average maximum for December.
Sunday arrived gloomy and dull with the low cloud draping Savernake Forest and the highest ground of the Marlborough Downs. A weather front is the reason with yet more cloud passing over later today that could produce light showers during the evening. The light wind has backed from the southeast to east, indicating a major change to our recent weather pattern is unfolding.
A mini depression has recently formed in the Bay of Biscay, just off the Brest peninsula, that is throwing the weather fronts across the country today.
The outlook for high pressure to build over Scandinavia and dominate our weather from Tuesday is very likely, which will result in temperatures by day and night falling below average. This will come as a shock as to date every maximum this month has been above average whilst most minimum have been above average, just five days were below. The high pressure will see the wind slowly back into the east-northeast and northeast by Christmas Day. This will result in a very different weather pattern to that which had dominated our weather this month, for drier, cooler air with minimal precipitation.