New warnings for snow and ice have been issued by the Met Office for parts of the UK - with hundreds of flood alerts also active.
A yellow warning for snow and ice is in place in Scotland from 3pm on Monday until 10am on Tuesday.
A separate yellow warning for ice has been issued for huge swathes of England and Scotland from 6pm on Monday until 10am on Tuesday.
Northern Ireland also has a yellow warning for ice in place from 8pm on Monday until 10am on Tuesday.
The Met Office said: "Areas of rain, sleet, and hill snow will move southeastwards through Monday evening and night before clearing to the North Sea.
"Whilst some patchy accumulations of snow will be possible, more especially on ground above 150-200m elevation, ice will be a greater hazard as temperatures fall fairly quickly once showers clear away.
"In addition, a period of strong northwesterly winds are also likely along some North Sea coasts later in the night and into Tuesday morning."
It warned of the risk of "injuries from slips and falls on icy surfaces" as well as "probably some icy patches on some untreated roads, pavements and cycle paths".
Meanwhile, the Environment Agency urged the public to stay vigilant amid the continuing risk of floods.
There are 75 flood warnings - where flooding is expected - already in place across England. The Environment Agency has also issued a further 189 flood alerts, where flooding is described as possible.
Jonathan Day, flood duty manager at the Environment Agency, said more than 24,000 homes and businesses have been protected, but around 330 have been flooded.
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Met Office operational meteorologist Dan Stroud said there is the possibility of some black ice and slippery surfaces, adding people should take extra care.
He said: "Monday really is a day of sunny spells and blustery showers.
"Overnight Monday into Tuesday we will see a frosty start. It's going to be a largely dry day, some decent amounts of winter sunshine.
"But it does start to go downhill later in the day, from the south and the west we've got a broad area of cloud and rain pushing in south-west England and South Wales late on Tuesday, during the course of Wednesday this will bring a mix of rain, sleet and hill snow."
Mr Stroud added: "We do need to keep an eye on this system, there's the potential for snow warnings to be issued.
"Thursday into Friday will be largely dry with some clear skies, turning milder towards the end of the week."
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