The swirling area of low pressure approaching the UK from the west, will become slow-moving, throwing bursts of wet weather across the country.
Early rain on Saturday will eventually clear from all parts to leave a mixture of sunny spells and ‘April showers’.
Some of the downpours will be heavy, with the chance of hail and thunder, particularly in Scotland, Northern Ireland, northern England and Wales.
Snow will mix in with some of the showers across very high ground in northern England and Scotland, above 600m (2000ft) elevation.
However, it will not be raining all the time, with dry interludes between the spells of rain.
It will be windy, especially around western coasts where gales are possible, adding to a chilly feel.
Maximum temperatures will range from 8 to 14C (46-57F).