The predicted temperatures of 14C by the middle of the week are well above February's average, with 6C the usual monthly average in Scotland and 9C in southern England, which will be a "noticeable shift" after the last fortnight which was below average, Met Office meteorologist Jonathan Vautrey previously said.
This comes after much of the UK has seen "anticyclonic gloom" over the past week, causing dull skies, with some areas not having seen the sun in more than a week.
Parts of East Anglia were hit by snow over the weekend, and some areas of the UK could continue to see snowfall into Monday, the forecaster said.
Outbreaks of rain moving across northwestern parts of the UK through this evening and overnight, falling as snow for parts of Scotland.
Aside from a scattering of snow in the north other areas of the UK will face frosty mornings this week with it being largely dry down south.