Ferocious winds up to 69mph and heavy rain are set to lash the nation this week as temperatures plunge to below average.
Forecasters have warned that the warm spell is officially over with the mercury predicted to drop to less than average for autumn.
And gale force winds and heavy rain are set to sweep across the nation from Tuesday as the washout week continues today.
Western Scotland, Wales and north-west England are expected to be the wettest areas while on Wednesday winds of up to 69mph are expected in the east of England.
The whole of the UK is forecast to experience winds averaging 35mph until the weekend.
Temperatures will be lower than last week when the south of England reached the high 20s.
And the warmest temperature expected across the UK will not top 18C throughout the week.
Some areas are set to experience up to 25mm of rain a day, most likely in eastern Scotland and eastern England, and more widely people can expect between 10-15mm of rainfall.
On Tuesday forecasters have warned of heavy rain while on Wednesday, north-west England and south-west Scotland could see up to 30mm of rain in just 12 hours.
Met Office spokesman Stephen Dixon said: "Tuesday in particular there's a band of heavy rain moving into the south west of the UK, the South East will hold on to the drier conditions longer but this band of rain moves eastward across the UK."
He added: "There is a low pressure system developing to the north west of the UK which at the moment is on track to bring some showers into Northern Ireland early on Thursday, and the west coast of Scotland.
"In addition to that, continuing strong winds for most of the week, especially in coastal areas and heading into the weekend.
"That theme continues as that low pressure system shifts around in the north of the UK, bringing showery conditions for most through the weekend."
UK Weather Forecast
Today:
Eastern parts starting dry with some sunshine, but showers in the west moving eastwards and then merging into a longer spell of rain, heavy in places with a risk of thunder.
Tonight:
Rain clearing across central and eastern areas, then later becoming drier with clear periods and scattered showers in the west.
Wednesday:
Many places dry with sunny spells, but feeling rather cool in the wind. A few showers in the west with cloud increasing across Northern Ireland later.
