More than two weeks of rain are expected to hit parts of the UK today, potentially causing further flooding.
The Met Office has predicted up to 40mm of rain in some areas, with west Scotland set to be hammered by downpours.
The Environment Agency has issued 21 flood warnings and 36 less serious flood alerts in England.
Met Office forecaster Greg Dewhurst said: "It will be a wet and windy day across the west of the UK and cloudy elsewhere.
"Through the day we will see rain and strong winds pushing south-eastwards.
"Four to five centimetres of snow is possible over the tops of mountains through the weekend."
The average total rainfall for the UK in January is 122mm.
The Environment Agency's flooding forecast states: "Local groundwater flooding is expected in parts of Dorset, Wiltshire, Hampshire, West Sussex and Brighton and Hove for at least the next five days.
"Land, roads and some properties will flood and there will be travel disruption."
Cloud and rain will clear from Scotland and Northern Ireland through the first part of this evening, leaving conditions dry with some clear spells.
Further south it is going to be predominantly cloudy with limited clear spells and some patchy light rain and drizzle.
Tomorrow early cloud and rain will clear the south-east through the morning, followed by a mainly fine and dry day.
There will be some good spells of sunshine for many regions.
Western Scotland will be cloudier though, with some scattered showers and odd shower in Northern Ireland too.
On Saturday, there will be some light rain across Scotland, Northern Ireland and northern England, but elsewhere will be fine with some sunny spells.
Other than some light rain and drizzle across Scotland on Sunday, it will be largely dry across the UK with variable cloud cover and sunny spells.
Met Office five-day weather forecast
Today:
Often cloudy, although occasional breaks possible in eastern parts. Eastern, central and southern England mostly dry, but elsewhere some rain at times, especially northwest Scotland. Windy, especially over northern and southeastern Scotland.
Tonight:
Rain at times for most this evening, rain becoming confined to England and Wales overnight. Clearer skies developing over Scotland and Northern Ireland later, though with blustery showers northern Scotland.
Friday:
Early rain over England and Wales clearing, brighter conditions following. Northern Scotland windy and blustery with wintry showers. Elsewhere, sunny spells. Colder than the last couple of days.
Outlook for Saturday to Monday:
Windy across northern UK this weekend with rain at times, staying relatively drier further south with some bright spells. Turning more widely unsettled and windy from Monday with gales possible.
