Temperatures could start to plummet in the coming days as the first signs of winter grip the country.
Some forecasts are suggesting that a spell of wintry showers, including sleet and snow, will arrive in places by the end of the coming week.
Worst of the wintry conditions are expected in the north but it is anticipated that overnight frosts could occur almost anywhere as the mercury nosedives.
Forecaster Brian Glaze, of The Weather Outlook, said the current unsettled but mild conditions will continue through the first part of the week, but a possible change is on the horizon.
He said: “During the middle part of next week there are signs of it turning colder with an increasing risk of snow in the north.
“Forecast confidence is low but there are signs of it turning colder with an increasing risk of sleet or snow in the northern half of the UK. “
Other forecasters also predict that a spell of colder weather is waiting in the wings with a bitter northerly wind possible from the end of the week.
General snow risk will be confined to the hills of northern England, with the threat of heavy bursts on low levels in Scotland.
But it expected to become much colder almost everywhere. However, a prolonged wintry spell looks unlikely.
Before it will stay mild with frequent showers and heavier downpours. Winds will pick up from Sunday, according to the Met Office.
Met Office five-day forecast
Outbreaks of rain continuing to move east, some of the rain in the south and west being heavy. Turning brighter in the west later, but windy with some heavy showers.
Rain, some heavy, becoming confined to the north and also south-eastern parts of England, with clear spells and scattered showers elsewhere. Further wet and windy weather into the west later.
Bands of rain or showers affecting most places at times through the day, although some sunny intervals developing. Windy in south, with a risk of gales across south-west England.
Outlook for Monday to Wednesday:
Rain, heavy at times affecting the west and northwest, otherwise mainly cloudy with best breaks in the east and south east. Remaining windy and mild throughout.