Snow has fallen in some parts of the country and there is a possibility of more on the way, forecasters say.
But the Met Office said the snow was only likely to lie on higher ground in western and north-western areas, with snow in more southern areas expected to clear.
A spokesman for the forecaster said: "What we're seeing is normal for this time of year. There have been flurries as far south as Exeter but that has been more wet slush and is likely to turn to rain.
"We are expecting showers in western and north-western areas today which could fall as snow on hills."
He said more snow might be seen on Friday in areas of Wales, Yorkshire, the Lake District and western parts of Scotland.
The Met Office has issued yellow weather warnings of ice for the Midlands, the north of England, Northern Ireland and Scotland.
Over the weekend the snow is likely to turn to rain across the country but there could still be a scattering of the white stuff on higher peaks.