Sunday
Mist and fog patches to start the day across England and Wales, lifting through the morning to give a bright day with variable cloud and occasional sunshine. More cloud in the north and west, with a little patchy rain and drizzle for western parts of Wales, Scotland and Ireland, although may turn persistent over the western Scottish Highlands. A fresh south to south-westerly breeze for Scotland and Ireland, strongest in the west. A light southerly breeze for the Midlands and south of England. Temperatures rising to between 19 and 23C by afternoon in England, Wales and Ireland, warmest in the south-east. 15 to 17C in Scotland.
Sunday night
Areas of fog will reform overnight in low lying areas, locally dense by dawn on Monday morning. Little wind. Patchy drizzle continues in western Scotland and Ireland. Overnight lows typically 8 to 13C, but locally down to 5C where skies clear in northern Britain.
Monday
A slack southerly airflow pattern across Britain and Ireland on Monday, with mostly little breeze. Early dense fog patches and low cloud may be slow to clear some low lying areas in England and Wales. For many it will remain dry, with a little hazy sunshine, although often cloudy. A scattering of showers may develop by the middle of the day onwards, locally heavy, but very much hit and miss. Drizzly rain likely to continue for western Scotland. Highs 17 to 21C by afternoon, and may reach 23C in the south-east in any sunshine.
Tuesday
Early mist and fog patches across central and southern England on Tuesday morning, locally dense and slow to clear. Fronts approach the west of Ireland, spreading east through the day, bringing a band of rain to Ireland and western Scotland, although becoming increasingly patchy as it moves eastwards. England and Wales likely to remain dry and warm, with hazy sunshine, best in the east, but clouding over from the west. A freshening southerly breeze in north-west Britain and Ireland. Temperatures around 15 to 17C in the north and west, but 20 to 22C in the south and east.