Tuesday will begin bright but chilly across northern parts of the UK. Further south, low cloud will bring some patchy light rain and drizzle. This cloud and rain will move northwards fairly quickly during the day, allowing brighter conditions to follow across much of England during the afternoon.

Where the sunshine emerges, temperatures will respond rapidly. It is expected to become very warm across parts of England, particularly in the south, providing a distinctly summery feel despite the approach of October.

Meanwhile, conditions will become increasingly windy, especially across western and north-western areas. Coastal gales are expected to develop, with the possibility of locally severe gales in some exposed locations later in the day. Outbreaks of rain will also reach western areas by Tuesday evening.

During Tuesday night, the rain will continue to move eastwards. It could become heavy in places and will be accompanied by strong winds and coastal gales. The rain is not expected to reach northern Scotland or eastern England overnight, while clearer spells and showers will follow across the west and southwest. It will be a warm night for many, particularly across eastern and south-eastern England.

Outlook for Wednesday

On Wednesday, the main area of rain will gradually clear towards the east. Wet weather may linger across the far east of England and the Northern Isles until after dark.

Elsewhere, brighter spells will develop, but there will also be showers. Some of these could turn heavy, with the potential for thunderstorms across western parts of the UK. It will remain windy in many areas, with gales possible around some northern coasts.

Following a warm start, eastern areas should remain quite warm during Wednesday. Further west, fresher air will arrive and temperatures will return closer to the seasonal average.

Met Office presenter and meteorologist, Alex Burkill, said: “Tuesday will start mild in the south, though rather grey with patchy rain and drizzle. Rain will gradually move northwards through the day, reaching parts of Northern England, southern Scotland and Northern Ireland by afternoon. Further south, skies should brighten once the front clears.

READ MORE: Week ahead: Warm, wet and windy before a calmer weekend

“Temperatures will be exceptionally high for the end of September, with highs widely reaching 27°C across southern England and potentially 28°C or 29°C in a few spots if sunshine is prolonged. Further north, temperatures will generally be in the mid-teens to low 20s.

“At the same time, winds will strengthen as a deep Atlantic low develops to the west of the UK. Although the centre of the low remains offshore, it will bring strong winds, rough seas and a spell of heavy rain overnight Tuesday into Wednesday.

“The heaviest rain is expected across western areas, including parts of Northern Ireland, Wales, southwest England and western Scotland, where 40-60mm could fall locally. Gusts may exceed 50mph in exposed locations. Further east, it will stay largely dry overnight, with unusually mild temperatures. In some places, overnight lows will remain in the mid to high teens, more typical of daytime values at this time of year.

“On Wednesday, the rain will continue eastwards, bringing a spell of wet weather to most areas before gradually clearing. Brighter conditions will follow, though showers are likely, particularly across Northern Ireland, western England, Wales and Scotland. It will turn a little fresher behind the rain, but temperatures will remain above average, reaching the mid-20s in the south and the high teens to low 20s further north. Looking further ahead, showers are likely to become more widespread through Thursday and Friday.”

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Autumn leaves in golden sunshine