The month ahead

The monthly outlook is based on output from global forecasting models and our own analysis.

December weather: Often quite cold

Forecast Issued 04/12/2017


Below average.


Slightly below average.


1/12 to 7/12

Changeable and cold later.

The first few days bring quiet weather and close to average temperatures to much of the UK but wet and windy periods affect the far north. During the second half of the week an area of rain and strong winds spreads eastwards and is followed by cold conditions with wintry showers.

8/12 to 14/12

Rather cold and changeable.

Early in the period all regions will be cold with wintry showers. Most of the showers are expected to be in the north and coastal counties. At times more organised bands of showers could spread inland and accumulations of snow are possible even at low levels. Later in the week there is a risk of more persistent spells of rain, sleet and snow pushing across the UK. Milder air may return into southern and central areas at times.

15/12 to 31/12

Mixed and rather cold. [Forecast confidence is low]

Milder interludes are likely, especially in the south and west of the UK, but over the second half of the month as a whole below average temperatures are forecast, and at times it could become very cold. It should often be dry with widespread night-time frosts. Wintry showers may affect all regions and at times some more persistent periods of rain, sleet and snow are possible.

Important note about long range weather forecasts: It is considered impossible to say with certainty what the weather will be like more than a few days ahead in the UK. Long range forecasts on TheWeatherOutlook have not been independently verified, and we make no claims for their accuracy. A range of factors including seasonal computer models, recent weather patterns, sea surface temperatures and teleconnections are considered when making the forecasts.


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