Monday has started off cloudy, wet and murky, but the forecast is set to improve this week as high pressure takes control.
And the Met Office long-range outlook is forecasting it will remain in place for much of the rest of January.
Temperatures will be around 11C on Monday, and after showers forecast on Tuesday, the Wales forecast for Wednesday to Friday says: "Staying generally dry and settled. Many places seeing plenty of sunshine, especially at first, but an increasing chance of fog by Thursday and Friday. Becoming colder with widespread overnight frosts."
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BBC Wales forecaster Sue Charles said: "It's a misty, murky damp start to the week, with patchy rain and drizzle. A mild one though, turning drier and a bit brighter later."
The weather maps for this week:
The high pressure also looks set to stay around for a while.
The Met Office long-range forecast for Friday, January 14 to Sunday, January 23, says: " A continuation of largely settled conditions is most likely as we head into the middle of January with high pressure in charge across the south of the country.
"Most areas will be dry with any spells of rain and stronger winds likely to be restricted to northern parts of the country. The settled weather will bring widespread overnight frost as well as fog patches, these sometimes freezing.
"Amounts of sunshine are uncertain with areas of fog and low cloud potentially lingering all day in places, especially in the south. How long the predominantly settled conditions persist is uncertain with an increasing chance of some unsettled spells returning to many parts as we head towards the end of the period."
The forecast for late January, into early February, says that "spells of wet and windy weather" will be followed by "brighter but showery interludes".
Overall temperatures are most likely to be near or a little above average though some colder interludes are possible. Snow could fall to lower levels at times in any colder interludes but is most likely over higher ground in the north.
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