The Met Office has issued a severe weather warning for snow across much of Southern England on Sunday.
The Yellow alert says: "Early rain over western Britain is expected to turn to snow as it spreads eastwards across much of England, Wales and southern Scotland during the course of Sunday.
"Early rain over Northern Ireland is also likely to turn to snow, whilst other parts of Scotland are affected by wintry showers."
The Citizen weather expert Ian Thomas said today will be dull and cloudy with some outbreaks of rain, drizzle or sleet on higher ground which should all move away eastward later on.
Temperatures will be in the region of 4-6c (39-43f) at best falling away to 1-3c (34-37f) overnight, he added.
"Tomorrow will see a complex area of low pressure develop and rain will push in during the day accompanied by strong west north-west wind," said Mr Thomas.
"Currently, this area of rain will move away temporarily late in the day but return overnight and this is where it gets a little uncertain.
"It looks as though the rain may well turn to snow overnight with significant accumulations possible. This will continue into Monday before gradually dying out during the day.
"This forecast may need some fine tuning with a lot to play for so watch local forecasts on Sunday"
The week ahead will remain cold with further frost and rain, sleet or snow.
In Gloucestershire it was the wettest January since 2009.
Overall the mean average temperature panned out at 4c (39f) about normal for the month.
There was 16 ground frosts and the coldest night was the 15th/16th at -4.5c (24f) followed by the coldest day of the month at -0.5c (31f).
Snow fell to a depth of 115mm (4.5) on the 18th with up to 250mm (10ins) at little Rissington.