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Weather Report – December 2020 and Review 2020

In Plymtree the weather was generally unsettled throughout the month. The total rainfall I measured for the month was 132.5mm. The average (1981-2010) at Dunkeswell Airfield is 121.2mm. This means that we received 109% of the Dunkeswell average. The wettest day of December was the 23rd with 17.5mm. There were 22 rain days (rainfall ≥ 1mm), which compares to an average of 14.9 days for Dunkeswell and only 5 days with no measurable rainfall. The month started with a rather cold spell but it turned generally mild from the 9th. However, the cold weather returned on Christmas Eve and it remained cold for the rest of the month. There were wintry showers overnight on the 26th-27th giving a light dusting on hills. The highest temperature I recorded during December was 14.3°C on the 21st. The lowest temperature, -3.4°C was recorded on the 31st. Only 4 air frosts were recorded during the month (minimum temperature at or below zero). As mentioned before, all daily measurements are made at 0900GMT each day and the figures attributed to the previous day apart from minimum temperatures which are recorded against the date they are read. This is standard World Meteorological Organisation (WMO) practice. The strongest wind during December occurred during the early hours of the 27th, in association with storm Bella, when a gust of 45.0mph was recorded.

My total rainfall for 2020 was 975.1mm, which compares to an average of 1065.3mm for Dunkeswell or 92%. It was a mixed year as far as rainfall was concerned, February, June, August, October and December having above average rainfall, in particular February which had more than twice the average. The spring was very dry with May having only 14% of average rainfall. Although rainfall was still just below average for 2020 and was slightly drier than 2019 it was still wetter than the years 2015 to 2018 which each saw 87%, 77%, 76% and 81% of average respectively. The highest daily rainfall total was recorded on the 18th June when 46.0mm fell (0900 GMT on 18th to 0900 GMT on 19th). The highest temperature of 2020 was 32.8°C (91.0°F) recorded on the 12th August and the lowest -4.2°C recorded on 20th January. The strongest wind recorded by Pete Draper during 2020 occurred during the afternoon of the 9th February when a gust of 53.9mph was recorded in association with storm Ciara.

Mike Ayles