The Met Office has issued a yellow weather warning for fog which could freeze in some places and disrupt travel.
Wet weather overnight should see temperatures rise by Saturday morning, the Met Office said.
The Met Office has issued a yellow weather warning for much of the UK as winter starts to bite.
Forecasters say the temperature drop may feel like a ‘shock to the system’ after unseasonal mild weather.
Snow and ice are predicted in the coming days.
The Met Office has put a yellow weather warning in place covering large parts of southern England and Wales.
Temperatures rose overnight to 16.5C in Bala, Gwynedd, north Wales.
The temperatures are expected to cool to more seasonable levels from Bank Holiday Monday.
The latest forecast for Christmas Day suggests there is a possibility of snow for northern parts of the UK.
A white Christmas could be possible for some northern parts of the UK, according to forecasters.
People are being urged to stay away from the coastline as Storm Arwen sweeps into the UK.
The Met Office has issued an amber wind warning across parts of north-east England and Scotland from Friday afternoon, lasting until Saturday morning.
Heavy rain fell on Wednesday night and into the early hours of Thursday as Storm Aurore moved in from France.
Transport delays are possible for some areas after heavy rain and strong winds overnight.
The Met Office has said the downpours will converge in north-east England and south-east Scotland on Tuesday.
The east and south of England and the north east of Scotland could see flooding, travel disruption and power outages over the weekend.
Flooding, transport disruption, and power outages are possible in parts of north east Scotland and the south and east of England.
The Met Office has said Lincolnshire and north of London could see a jump in temperatures.
The Met Office has issued a yellow warning for heavy showers and thunder across parts of England, Wales and Northern Ireland.
A report by the UN's Intergovernmental Panel on Climate Change is the first to quantify the likelihood of extreme events across a wide variety of scenarios.