Today is the warmest December 19th ever recorded in Norfolk
- Credit: Steve Adams
December could be the mildest across a large part of England since records began more than 350 years ago, forecasters have said.
Temperatures were already around 16C in Norfolk on Saturday morning.
Dan Holley, from forecaster Weatherquest, said a reading of 15.8C was recorded at Santon Downham at 9am on Saturday.
It makes it the warmest recorded temperature on December 19 in Norfolk - beating a high of 15.5C in Hemsby in 1993.
The warmest average for the month under the Central England Temperature series was 8.1C in 1934 and 1974, said MeteoGroup senior forecaster Julian Mayes.
'The average this month is currently 9.3C - so well above, though we do think temperatures will come down a bit from Sunday,' he said. 'But there is still a chance that the record will be broken.'
The Central England Temperature series records the day/night average and began in 1659.
- 1 Two Norfolk seaside hotels named among the best in Britain
- 2 PICTURES: The best-dressed punters at Fakenham Ladies Day
- 3 Breakup and burglary! Couple's chaos after £101m win on Euromillions
- 4 Michael McIntyre and Robert Rinder spotted at Carrow Road
- 5 City councillor investigated after Facebook golliwog post complaint
- 6 Norfolk police officer goes on the run to win £100,000 on Hunted
- 7 Fly-tipping mattresses costs mother and son over £1,000
- 8 Can you answer these 10 GCSE questions designed for 16-year-olds?
- 9 Eleventh McDonald's drive-thru could be set for Norwich
- 10 Greyhound saved from euthanasia among five dogs looking for homes
Mr Mayes said the highest December temperature recorded in London was 17.2C - and that could be threatened on Saturday.
'We are looking at maximum temperatures of 16C to 17C, from London up to East Anglia and the East Midlands,' he said.
A band of tropical air coming off the Atlantic from the south west is behind the unseasonal conditions, and temperatures have been edging towards the all-time December high of 18.3C, set on December 2 in 1948 in the Highlands.
The weather has been so mild that daffodils have been flowering as far north as Chester, and in Northern Ireland.
The Met Office has said it is the fourth mildest start to December across the UK since 1960.
The month has also been characterised by wet weather in the north west.
Areas such as Snowdonia and the Lake District have seen rainfall of 500mm (nearly 20 inches) in the month so far - almost equivalent to a year's worth of rain for London and East Anglia.
•You send your photos of the warm weather to iwitness24.co.uk