Britain could be covered in a haunting white blanket a week before Halloween as winter begins during the half of October.
Temperatures are set to drop drastically in the coming weeks, which means trick-or-treaters can don wool hats and gloves.
Snow could occur over the north of England, the Highlands and the Scottish Borders on 24 October, WXCharts’ long-range forecast indicated.
As the Atlantic weather front progresses, conditions will become widely unstable across the UK before freezing cold at the end of the month.
Although forecasts are difficult to confirm in advance, a more active jet stream indicates that unconventional October weather may be on the cards in some areas.
That means a cold week is in store for half-hearted Brits, with schools from October 25 through October 31.
Brian Gage, director and forecaster for The Weather Outlook, explained: “High pressure is currently bringing dry and mild or even fairly warm conditions over much of the UK, although the Atlantic weather front makes it more north-west. are destabilizing.
“At the end of the month, some computer models are indicating that the high pressure will concentrate to the north or west of the UK,” he said.
“If this happens, the likelihood of cold weather will increase, making the risk of night frosts much wider.
“There may be hail or snow showers on the higher plains in the northern part of the UK.”
This comes before a “cold-settled period” that is expected during the transition in November.
John Hammond, a former BBC weatherman and WeatherTrending meteorologist, also suggested that Brits might shovel snow from their pumpkins.
“With a more active jet stream, there is likely to be some wet and windy weather by then,” he said.
“It is likely that as the Arctic freezes, an intrusion of northerly winds across the UK will bring occasional cooler air, with snow likely to increase over some northern hills and mountains, particularly by the end of the month.
“By then frost will also become a major threat, but it will not be anything normal.”
The Met Office had earlier warned that temperatures could drop as much as 10C a week in some areas as the cold starts in early November.
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Greg Duhurst, senior meteorologist at the Met Office, previously told Online: “We are likely to see some snowy weather in the higher parts as October approaches November.
“The likely areas to be affected are the Scottish Mountains as well as the high plains in northern England and northern Wales.
“Low areas are unlikely to see any. It’s fairly normal for this time of year.”
And bookies have also predicted a white Halloween, with snow likely to fall in a major UK city before the end of October.
It comes after a week of inclement weather across the country as temperatures rose to 18C today – days after flash floods caused by heavy rains.
The storm has given way to a plume of warm air from the continent pulled in by the remnants of Hurricane Sam.
The Britons have seen sunshine and temperatures rise to 21C since Thursday, with a hot and dry weekend ahead.
According to forecasters, southwesterly winds are pulling in the subtropical air, making it warmer during the day and lighter at night.
Online has contacted the Met Office for comment.