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Recurring ground frosts but glorious sunshine

The air temperature over the last three nights did not drop sufficiently to give an air frost but cold enough for a ground frost with a low of 0.5C last night. Maximum temperatures this month have all been below the long-term average, the last two days being 3C below.
Yesterday morning there was a brief shower of snow pellets lasting just a few minutes.

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Summary for February and the past Winter

FEBRUARY
February started dry and cold with air frosts on nine consecutive days, there were also nine consecutively dry days. As depressions crossed the country for the latter half of the month temperatures recovered at the expense of cloud cover and rainfall.
The mean temperature was 3.3C, which is 0.9C below the long-term average. The coldest night was the 2nd when the thermometer dropped to -4.1C with the warmest day on the 25th with a maximum of 11.9C, the warmest February day for three years. The record for the warmest February day was set in 1998 with a peak of 15.5C. An air frost was recorded on 14 days, which is three days greater than the long-term average. During the very wet February of 2014 there were no air frosts.
The total rainfall for February was 57.2mm, which is 87% of the long-term average. This is such a contrast to February last year when the total rainfall was 152mm. The wettest day occurred on the 19th with 15.5mm although there were 15 dry days in the month.
There were eleven days with no direct sunshine. The peak days were 17th and 27th with 7.98 and 8.0 hours respectively.
Solar energy was 10% above the average for the last six years and very close to that recorded in 2014. On the 28th a peak value for ultra-violet light in February was recorded.

WINTER
The mean temperature for the three winter months of December, January and February was 0.4C below the long-term average. This contrasts with the very cold winter of 2009, which was 2.1C below the average.
There is a marked contrast in total rainfall for the past winter, which at 209mm is 41mm below the long-term average. The previous winter was notable for several very wet months and brought us 528mm.
Snow was recorded on 6 days during the winter but only three days when it lingered on the ground for several hours. Morning fog was noted on four days.
There were 41 days when an air frost was recorded and is 7 greater than the long-term average.
Summarizing, the past winter has been colder and drier than average with solar energy just a little above the average for the last six years.