Sunday
Cold air sweeps southwards across the country. Showery across the north and east, with hail and snow, not just confined to the hills - in northern Scotland snow may lie to low elevations for a time. A fragmenting band of rain will drift south over England and Wales, but may allow some heavy showery bursts to break out over central and southern counties through the day. A brisk north to northeasterly wind. Temperatures only 5 to 9C in the north, may stay at 13 to 17C in far south.

Sunday night
A mostly dry night across the UK and Ireland though wintry showers could affect northern Scotland and the Northern Isles at times. The clearest skies over western areas, cloudy to the east. Winds remain strong from the north to northeast. A cold night with overnight lows at -2 to 0C to the north and west, 1 to 5C to the south and east.
 

Monday
High pressure to the northwest of Britain draws in a cold Arctic air mass across the country. Strong north to northeasterly winds will feel distinctly chilly for early May. A scattering of showers affect northern Scotland and eastern counties of England, these of hail, or snow over the hill tops. Generally dry with sunshine across central and western regions. A chilly start with frost in sheltered spots. Highs only reaching 8 to 12C.

Tuesday
Dry for most places through the day with slack high pressure in charge. A few showers possible for Scotland and Northern Ireland with more cloud here. Sunshine and broken cloud for England and Wales. Light winds, typically northwesterlies across northern Britain. A chilly start with frost in many rural areas. Highs up to 11 to 14C.