A large area of low pressure in the Atlantic is anticipated to draw warm south to south-easterly winds across the UK early this week. Tuesday is expected to be the warmest day, with temperatures generally returning closer to the September average afterwards.
Much of the UK can also anticipate a period of wetter and windier weather from the approaching depression. The most unsettled conditions are likely to affect Scotland, Northern Ireland, and western parts of England and Wales. However, many central, southern, and eastern areas of England, which have experienced drought, may see significantly less rain.
On Monday morning, it will be notably chilly, with potential fog patches. Once the fog clears, many areas will see a brighter day with sunny spells and scattered showers. South-east England may experience some rain in the afternoon and evening, though this is not guaranteed. Temperatures are forecast to range from the mid to high teens, with some southern areas reaching 20C.
Tuesday will bring a much warmer day due to a strengthening southerly wind. Temperatures in the high teens are forecast for Scotland and Northern Ireland, and between 20 to 26C for England and Wales. Rain is expected to move into Northern Ireland during the afternoon and then slowly trek eastwards, potentially becoming persistent and heavy, with strong winds and gales for exposed coasts and hills. Drier and brighter conditions may persist further east before the rain arrives on Wednesday, possibly lingering overnight.
Behind the rain, Wednesday is expected to bring sunny spells and scattered showers, remaining windy in the west. By Thursday, high pressure is anticipated to build, leading to calmer and drier conditions. By Friday, the north-west is expected to be the focus for any showers.