Temperatures are set to plummet below freezing by the end of the month with Britain's first snowfall of the season expected within a fortnight.
After a warm start to October, temperatures have already seen a noticeable drop with the nights drawing in and a chill in the air.
For mid-October the temperature is predicted to be typical for the time of year but the UK is set to see a colder front of wind, bringing freezing temperatures in some parts of the country.
This week may see the cold front brought from the northwest of Scotland pushing down as far as the Midlands, with areas like London potentially seeing the mercury read at 6C, the Express reports.
There is also a chance of heavy rain in parts of the UK in the coming weeks, according to meteorologists.
Jim Dale of British Weather Services, said conditions are set to return to their seasonal averages, with wetter weather returning next week.
He said: “This week no problems, mainly sedate. Next week wetter & windier but no storms as such.
“Wettest in the northwest - as per usual. Not overly cold, indeed just reverting to the seasonal averages.”
A freezing polar vortex could blast the country within weeks, bringing with it a “white Halloween” for some.
Forecasters are predicting snow to fall across Wales and Scotland's west coast at 6am on October 24, according to netweather.tv.
Even southern coastlines could get a dusting in a "rare" forecast last seen in 2008.
Accuweather meteorologists expect a large weather front to bring cold and stormy conditions to UK shores which will last into November.
October 24 is the suggested date for the mercury to drop to 0C north of the Scottish border with some parts of the country expecting lows of -1C.
While Scotland freezes, temperatures will remain at 4C across England. However, some areas of in the north will plummet below -2C.
Scotland could also reach this same low by October 25.
These icy conditions will remain through October 26 - with most of England still balancing above the freezing point.
Some parts of northern Scotland and the east coast of England will stay a little warmer - with the UK's highest temperature of 5C.
The predicted temperature drop is up to 4C lower than it should be for this time of year.
Former BBC weatherman John Hammond said the freezing weather could also be brought about due to the weakening of the polar vortex with less strong winds than normal over the Arctic circle.
“There are signs of the stratosphere experiencing an unusual warming in the next few days, causing the polar vortex above the Arctic Circle to become less strong than normal later in October," he told the Sun.
These high-altitude winds normally intensify as we head towards winter.
"An unusual weakening of the polar vortex may well have impacts on our weather later through autumn and into early winter.
“Sudden stratospheric warming' events can sometimes lead the polar vortex to go into reverse, which can have dramatic impacts on winter weather and increase the chances of severe cold."
UK five-day weather forecast
Today:
A fair amount of cloud around today, but also some bright or sunny spells at times, best of the sunshine in the southwest and northeast. Mostly dry for many areas by the afternoon as well. Breezy in the north.
Tonight:
Variable, and often large amounts of cloud with fog patches forming across southern UK. Turning windier across Scotland with rain, heavy at times, developing in the far north later.
Thursday:
Windy in the north with spells of rain spreading across Scotland reaching parts of northern England and Northern Ireland later. Elsewhere, breezy with a mixture of cloud and sunny spells.
Outlook for Friday to Sunday:
Rain at first over central parts easing southwards. Cool mornings in the north and more rain in the northwest on Saturday spreading southeastwards through the weekend. Elsewhere dry, often cloudy.
