Sunday
A ridge of high pressure affects southern and eastern parts of the country on Sunday. This brings spells of sunshine, warmer temperatures and dry weather for many across England and Wales. Thicker cloud and heavy rain affecting Ireland and western Scotland; strong winds here too, particularly in the southwest. Rain spreading into northern parts of England and across much of Scotland with the exception of the northeast through the afternoon and evening. Highs at 15 to 20C for the island of Ireland, Scotland, Wales and northern England; 21 to 24 or 25C for central and southern England.

Sunday Night
Rain continues overnight for much of Scotland and the far north of Ireland but staying dry elsewhere across the British Isles. Breezy for western and northern areas. A rather cloudy night across the country too which will keep overnight lows at a rather muggy 12 to 17C.
 

Monday
High pressure to the southeast of the UK on Monday with low pressure west of Ireland. Very warm with good spells of sunshine across southeastern and southern parts of England. Cloud thickening to the north and west giving hazy sunshine for much of central England then cloudier conditions for much of Ireland, Wales and Scotland. Some heavy rain is expected for western parts of Scotland, while northern Scotland and northwestern Ireland could see outbreaks of light, drizzly rain at times. Highs widely at 21 to 26 or 27C, just 15 to 17C for northwestern Scotland.

Tuesday
Low pressure is to the west of Ireland on Tuesday with high pressure to the east. Much of the UK and Ireland should see a bright, warm and dry day. Far western and northern parts of Scotland and Ireland may occasionally see some light rain as fronts graze these areas. Cloudier here too. Through the evening, heavy, thundery showers may develop over southwestern parts of the UK. Highs at 30C, or possible higher, in southeast England, more widely 21 to 29C.