Parts of Britain could wake up to mist and fog on Christmas morning – with a cloudy day forecast for most of the country.
The Met Office has already issued yellow weather warnings for fog in Northern Ireland and central and south-west Scotland for dense fog and freezing fog patches.
These run until 10am on Christmas Eve, but forecaster Greg Dewhurst said these could be extended.
“It could be quite dense from this evening and through the night tonight,” he said.
“It will be a grey start for most. In the east it will be mostly dry, an odd spot of drizzle is possible in the west.”
Temperatures are expected to be average for the time of year, with 5-9C (41-48F) predicted in the east and 11-12C (51-53F) in the west.
Later in the week there will be a mixture of misty conditions and sunny spells, with the potential for overnight frost if skies are clear.
Sunday saw a wide range of temperatures across the UK, with 13.9C (56.8F) recorded in Exeter and a low of -2.6C (27.3F) in Aboyne, Aberdeenshire.