Met Office Meteorologist Aidan McGivern said: “Frosty start on Saturday, cold winds remain through the weekend the wind strengthening through Saturday as as well. But there will be plenty of sunshine. Early morning frost across parts of Scotland away from more blustery coastal areas few frost patches for Northern Ireland as well.
“A more widespread frost is expected for England and Wales.”
Temperatures are expected to be below freezing.
He added: “Much of Scotland will be bathed in blue skies and Northern England, Wales and southwest.”
East Anglia is likely to see showers of hail or soft hail throughout Saturday.
Coastal gales are expected across Scotland and Northern England.
On Sunday the cloud is forecast to thicken over much of the UK.
Temperatures will drop down to 3 degrees celsius in the bitter winds in East Anglia.
Some people will be able to feel the sunshine if they are out of the wind.
Mr McGivern said: “There will be plenty of sunshine through the weekend and it will feel warm in that sunshine.
“It is gaining strength at this time of year. But only if you are out of the wind.
“There will be an increasingly cold and brisk across many places. That wind coming in from Scandinavia via an area of high pressure.
“It’s coming in from the east bringing increasingly chilly air with them through the weekend.