Sunday
The area of high pressure remains over the south of the UK. Frosty patches in the south, mist or fog are all expected at first. Broken cloud and sunny spells thereafter. Always more cloud in the north and west with lighter rain/drizzle across northwest Scotland. Windy here too. Highs at 6 to 9C, cooler though in the lingering fog further south.
 

Sunday Night
More persistent rainfall pushes in on to the Western Isles and northwest Scotland overnight with gusty winds expected here. Western coastal regions of Ireland too will see some rain. Dry elsewhere with clear spells across England and Wales. Cloudier further north. Lows at -1 to 4C.
 

Monday
High pressure stays over the UK and Ireland on Monday. Fog in the morning in southern and central England and Wales may be slow to clear. Where it does clear it should be dry with a few bright spells. Thicker cloud across Ireland, Northern Ireland and many regions of Scotland where there will be some patchy rain and drizzle in places. Highs at 5 to 9C, but colder where fog persists.

Tuesday
High pressure centres over southern England allowing for dry and settled conditions for most. After a chilly start in the south, expect broken cloud with some sunny spells about for many. Patchy rain, drizzle again affecting northwest Scotland. Highs at 6 to 9C.