Brits are set to face sub-zero temperatures this week when an Arctic blasts hits the UK.
People could be forced to turn the heating on when the the freezing weather hits on Monday with temperatures set to plummet to -2C.
Alexander Burkill, senior operational meteorologist at the Met Office, said: "A cold front pushing in from the north will bring rain and strong winds later tomorrow and overnight into Monday.
"Behind it we will have cold, northerly air moving in which is why the weather will feel more autumnal this week.
"Temperatures will be a little below average for the time of year with highs for most in the mid-teens Celsius, although some chillier spots in the north may stay in single figures. Monday night into Tuesday looks likely to be the coldest when temperatures in prone rural spots are likely to dip a little below freezing, around -2C.
"Thereafter there will be a gradually rise in temperatures but it will still feel more like autumn than of late due to brisk winds and some showers too."
Later in the week showers or more persistent rain alternating with drier and brighter spells, the weather service confirmed.
The Met Office added: "Cloud and rain will most likely spread from the west or southwest at times, with eastern areas perhaps drier on average, the winds may become strong at times, most likely in the northwest.
"A shift towards more settled weather could possibly begin at the end of this period. Temperatures rather cold at first, then trending close to or slightly above average."
Last night temperatures dropped to as low as -0.2C in parts of Tydrum, Scotland and could fall as low as -4C in remote areas early next week.
Higher places in Northern Scotland could see snow at the start of next week as temperatures are set to drop amid icy winds.
Moving further south, Northern England and parts of Scotland are predicted to experience heavy rainfall.
Mr Burkill added: "Low temperatures overnight will not be massively colder, I would expect Monday night through to Tuesday to be a cold one at -2C, and could be the coldest night of the season so far.
"Because the winds are coming from a northerly direction, this will add to the cold feel by day, however because they are going so briskly, by night this will stop temperatures dropping as low as they could."
In Ireland, Met Éireann's indicated temperatures could swing as low as 3C at night time.
Met Office forecaster Aidan McGivern added: “Across the UK temperatures are going to be below average for the second half of the weekend and into Monday as well as Tuesday.
“It’s certainly going to feel cold first thing with a touch of frost in the North and chilly winds.”
