Monday will start with rain across northern England and Scotland, although this will gradually move northwards through the day and become increasingly confined to northern Scotland.

Elsewhere, conditions will be mixed, with variable cloud and the odd shower. However, many southern and eastern parts of England are expected to remain largely dry with sunny spells developing. Later in the day, outbreaks of rain and scattered showers may reach Northern Ireland, the far west of Wales and the far southwest of England.

The warmest conditions will be found across eastern and southeastern England, where temperatures are expected to rise significantly. With sunny spells and lighter winds, it is likely to feel hot or very hot in places. Meanwhile, temperatures elsewhere will be somewhat lower, particularly where cloud and rain persist for longer.

Through Monday night, much of eastern, southern and central England is expected to remain mostly dry. Temperatures will stay higher than on recent nights, leading to a warmer and more humid feel. There is a small risk of isolated showers or thunderstorms developing across parts of eastern, southeastern and central England.

Further north and west, cloudier conditions will dominate, with outbreaks of rain and the possibility of isolated thunderstorms. Some rainfall could be heavy at times, especially across northern areas. It will also become breezy across the far north of Scotland and parts of the far southwest.

Outlook for Tuesday

Tuesday brings a more unsettled picture for northern parts of the UK. Persistent and, at times, heavy rain is expected across parts of northern Scotland, accompanied by extensive low cloud and stronger winds.

Elsewhere, Scotland, Northern Ireland, northwest England and Wales are likely to see frequent showers, some of which could be heavy, slow-moving and locally thundery, with the risk of hail. A yellow thunderstorm warning is in place for Northern Ireland from 12pm to 9pm.

In contrast, central, southern and eastern England should see fewer showers and more prolonged sunshine. It will remain hot and humid across eastern England, while temperatures elsewhere are expected to be closer to average for the time of year.

By Tuesday night, further heavy rain is likely in the north, while a scattering of showers continues elsewhere. Eastern and southeastern England are expected to remain mostly dry with the best of the clear spells and continued warm conditions.

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Met Office presenter and meteorologist, Tom Morgan, said: “It’s a warm and humid start to the week, with some very hot weather across the southeast of England. Further north, it’s a wetter picture, with rain across Scotland gradually moving northwards and becoming heavy at times, particularly across northern Scotland by the afternoon.

"Elsewhere, a few showers will follow across southern Scotland and Northern Ireland as skies brighten. Much of England and Wales will stay dry, with long spells of sunshine and temperatures widely reaching the high 20s or low 30s. In the southeast, temperatures could approach the mid-30s, and with light winds it will feel particularly muggy and humid.

"Into Monday evening and overnight, there is a risk of a few isolated heavy showers or thunderstorms, especially across the southeast, although confidence on their location remains low. More generally, northern and western areas are most likely to see outbreaks of rain or showers, with some locally intense downpours possible. It will be a warm and humid night for many, particularly in the south, where some towns and cities may remain above 20°C throughout the night.

"Tuesday will be a wet and breezy day across parts of Scotland, with some significant rainfall possible, especially in the north. Further south, heavy showers may develop across northern and western parts of the UK, while southern and eastern areas are likely to remain largely dry and bright with lengthy spells of sunshine. Temperatures will stay warm, reaching 28 to 30°C in parts of the south and east, while humidity levels remain high across much of the UK.”

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A cloudy summer sky