New Year's Eve could be the warmest on record, forecasters predict.
Temperatures are set to reach 14C or 15C in some areas of the country on Friday.
The previous highest temperature on New Year's Eve was 14.8C, recorded 10 years ago.
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It is not expected be quite that warm in Greater Manchester, but a high of 13C is being forecast across the city.
That is well above the average temperature for December.
"The record is 14.8C on New Year’s Eve and that was in 2011, temperatures look like they’ll be 14 to 15C so it is possible that temperatures could be that value,” Met Office Meteorologist Greg Dewhurst said.
“We’re going to see across the whole of the country, through the rest of this week, temperatures that are above average for this time of year.
"The average temperature in the UK around this time of year should be around 7-8C.
"Going forward, we’re looking at highs of around 12-14C, possibly locally 15C in one or two spots, so it’s going to be well above average."
While the warmer temperatures will be welcomed, wet weather is also forecast for much of the week.
"It isn’t going to be blue skies all week," Mr Dewhurst said.
"There’s going to be cloud at times as well as strong winds and heavy rain, particularly across the North and the West of the UK.
"This is all being driven by low pressure systems moving across the Atlantic and bringing in the milder air and wet weather."
New Year's Eve weather forecast for Greater Manchester
Bury - 12C, cloudy
Bolton - 12C, cloudy
Manchester - 13C, partly cloudy
Rochdale - 12C, cloudy
Oldham - 11C, light showers changing to overcast
Salford - 12C, partly cloudy
Stockport - 12C, partly cloudy
Tameside - 12C, light showers changing to cloudy
Trafford - 13C, partly cloudy
Wigan - 12C, partly cloudy changing to sunny intervals
