Brits are in for a sunny Sunday with temperatures expected to hit 10C across parts of the country after a freezing night.
Frost crept in overnight with temperatures plummeting as low as -6C in some areas.
Forecasters said the "peaks and troughs" of spring will hit most of the country over the next week, with sunny spells and windy intervals expected in most regions.
Sunshine and dry weather could warm up most parts of the UK on Sunday, but rain is likely to edge in over Northern Ireland and Scotland.
Met Office meteorologist Simon Partridge said: "A wetter and windier day round there and we could see some strong, possibly gale-force winds around Scotland."
More unsettled weather is set to hit most of Britain from Monday to Wednesday, with widespread rain and wind expected.
"That's the difficulty with spring and its peaks and troughs," Mr Partridge said.
The sunny weather will be brief, with bands of rain and wind forecast for the week ahead and into the Easter weekend.
Looking to Thursday April 7 - Saturday April 16, the Met Office said: "To end the week and through the weekend, it is likely to be cold in the north with wintry showers. Further south, weather systems coming in from the southwest will bring more prolonged spells of rain and strong winds.
"There is a risk of snow at times on the northern edge of the bands of rain, this mainly across central and northern areas. Widespread frosts are expected in the north, with some icy patches likely. In southern areas, temperatures will be nearer to average, locally rather warm.
"Into the following week, it will likely remain unsettled, but with the focus for the heaviest rain and strongest winds moving towards the north and west of the UK, allowing some drier interludes in the southeast."
The icy weather this month comes after the UK experienced its sunniest March since 1929.
Northern Ireland basked in 90% more sunshine than average for the month, with a total of 192.5 hours of sun.
Scotland saw 64% more sun than usual, with a total of 160.1 hours, while England enjoyed its sunniest March at 168.1 hours and Wales its fifth brightest with 157.9 hours.
UK forecast for next five days
Today:
A fine day for most on Sunday with some sunshine, particularly England and Wales though a few showers possible for central parts. Cloudier further north with rain arriving from the northwest during the day. A little milder than Saturday.
Tonight:
Rain over Scotland continuing southwards overnight. Temperatures rising from the northwest though falling for the first part of the night for England, Wales and Northern Ireland. Becoming windier.
Monday:
Cloudy for most with rain over western upslopes. Elsewhere some light rain at times but many eastern areas dry with some brightness. Breezy for all but milder than Sunday.
Outlook for Tuesday to Thursday:
Rain across many northern areas Tuesday, brighter in the south. Snow across parts of Scotland on Wednesday with showers elsewhere. Cold on Thursday with snow showers in the north.
