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Winter 2013

The following represents a provisional assessment of the weather experienced across the UK during the first two months of Winter 2013 (December and January) and how it compares with the 1981 to 2010 average.

Mean temperatures over the UK were equal to the long term average during December and 0.4 °C below during January. As is often the case in the UK this masks distinct periods of notably mild weather which occurred in late December and early January, and notably cold weather in early December and mid to late January.

It was provisionally the wettest December since 1999 with rainfall well above average at 150%, and the run-up to the Christmas period saw considerable disruption from flooding events. January was drier than normal for the UK as a whole (88%), with a few localised exceptions in some coastal areas and Northern Ireland. There was a period of widespread snowfall across much of the country from mid to late January as frontal systems hit colder air, causing considerable disruption. This was followed by a rapid thaw when the weather changed once again in the last few days of the month; snowmelt and further rain resulting in some further localised flooding.

December was a sunny month with 120% of average sunshine for the UK, with a few duller exceptions in the far north of England and parts of Scotland. January was generally dull across most of the country with 79% of the long term mean sunshine.

UK statistical summary
Mean temperature Rainfall Sunshine
The provisional mean value for December and January is 3.6 °C, which is 0.2 °C below the 1981-2010 average. The provisional total for December and January is 288 mm, which is 119% of the 1981-2010 average. The provisional total for December and January is 85.7 hours, which is 97% of the 1981-2010 average.

Provisional graph of UK daily mean temperature for Winter 2013 (December and January)

Provisional graph of UK daily mean temperature for Winter 2013

Provisional mean temperature anomaly (difference from average) map for Winter 2013 (December and January)

Provisional temperature anomaly map for Winter 2013

Provisional rainfall percent of average map for Winter 2013 (December and January)

Provisional rainfall percent of average map for Winter 2013




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