It's the first week of the school holidays so what does the forecast say?
What the forecast says
From Sunday and through into Tuesday, high pressure building in Central Europe will keep things fine and dry in the southern half of the UK, but the northern half will see plenty of rain, which will be heavy at times. There is a risk for some local flooding in West Scotland from Sunday through Tuesday. A heat wave expected to develop in France will bring in some hot air to the Southeast from Tuesday, with temperatures well above average and reaching into the low 30s on Tuesday and Wednesday. Staying a bit cooler up north, but still warmer than this week has been.
For the second half of the week, there is some uncertainty in the forecast based on a cold front arriving from the west. The jet stream - a ribbon of fast-moving air in the upper atmosphere that drives weather systems - is unusually strong for summertime in the United States and Atlantic. This will likely result in a cold front arriving on Thursday, bringing some relief from the heat but also a risk for some heavy showers and thunderstorms, especially in the North. Low pressure will then take over, and keep things unsettled and feeling cooler through the weekend.
What the Met Office says
Many parts will be dry with spells of warm sunshine. Northwestern parts of the UK will turn cloudier, with rain spreading across Northern Ireland during the morning, before reaching western Scotland in the afternoon. Winds strengthening in north and west.
Rain across Northern Ireland and western Scotland, spreading to the rest of Scotland, northwest England and northwest Wales. Otherwise mostly dry with clear spells, but windy in north and west.
Outbreaks of rain in the northwest, generally becoming confined to western Scotland during the day. Mostly dry elsewhere with some warm sunny spells developing away from windward coasts and hills.
Outlook for Tuesday to Thursday:
Turning very warm and humid for many and increasingly hot and sunny across eastern and southeastern parts, but a risk of thunderstorms at times. Occasional rain also fringing western areas.