by A surprisingly warm spell is on the way this week, with temperatures expected to reach as high as 22C.
Some parts of the UK will see temperatures above 20C midweek, as the Met Office predicts a welcome high of 10C after a spell of heavy rain.
Light Atlantic air will sweep up into the UK, bringing the heat on Tuesday and Wednesday, forecasters said.
This could lead to temperatures of up to 22C in the east and south-east of England, while East Anglia and the Home Counties are expected to be very hot.
Met Office meteorologist Tom Morgan said: “Temperatures will gradually rise, probably peaking on Wednesday in the east, and we may see 20C in some spots, and no doubt 22C, probably in the east of England – so East Anglia down. towards the southeast.
“But it will be a lot milder compared to now for everyone. We could be in excess of 20C in London but the peak temperatures could be up towards the Home Counties and up to Cambridgeshire.”
He said some places will be 10C warmer on Wednesday than on Sunday, but warned that the short hot spell will not be an Indian summer, and will be replaced by rain by the weekend.
“It will not be an Indian summer – an Indian summer is a period of fine, settled weather with widespread high temperatures following a period of frost.
“We have had some frost but it will only be a day or two before we see these high temperatures.”
The west of England and most of Wales will be “quite wet” in the middle of the week, Morgan said, with strong winds and a band of heavy rain pushing eastwards across the UK on Friday.
This weekend is “looking quite unsettled”, he said, with wind and rain set to affect north-west England, Scotland and Northern Ireland.
Yahoo breaks down the weather for each region of the UK, according to the Met Office.
London and the South East
Mostly cloudy at first, with periods of rain and heavier bursts in between. This rain should clear to the east during the morning, but will leave a legacy of low cloud and perhaps the occasional spot of drizzle later. Hot in the south. Maximum temperature 17°C.
Cloudy and damp overnight, with some light rain or drizzle from thicker cloud. Mainly light wind, but gradually becoming hazier as the day dawns. Minimum temperature 8°C.
A damp start to Tuesday, and generally partly cloudy again, but drier with limited bright spells developing later. Heavier rain may reach the south late. Wind strengthening but hot. Maximum temperature 17°C.
Wet and windy on Wednesday. Drier and brighter but cooler conditions should spread from the west on Thursday. Friday maybe starting fine, but getting wet and windy again later.
Southwest
Patchy rain at first, especially in the east. Staying on the cloudy side for much of the day, although it will become generally dry. There can be a few glimmers of brightness from time to time. Feeling warmer in any sunny spell. Maximum temperature 16°C.
A dry afternoon with mostly cloudy skies. Little change overnight, although there may be some light rain or drizzle over the hills during the early hours. Minimum temperature 10°C.
Tuesday is expected to be partly cloudy, with limited brightness. Light rain and patchy drizzle will still be possible over the hills. Turning wetter and windier through the afternoon. Maximum temperature 17°C.
Wet and sunny on Wednesday, with the rain turning heavy at times. Brighter on Thursday, before more wind and rain moving in from the west during Friday. Above average temperatures.
Midland
A cloudy, damp, drizzly start to the morning. Soon becoming dry across the region, but staying on the cloudy side for much of the day. There can be a few glimmers of brightness from time to time. Staying on the cold side. Maximum temperature 11°C.
A dry evening, but with rather cloudy skies. There will be little change overnight, although there may be a few spots of light rain or drizzle over the hills during the early hours. Minimum temperature 8°C.
A cloudy day is expected on Tuesday, with limited brightness. Light rain and patchy drizzle will still be possible over the hills. Increasingly sunny, with heavy rain coming overnight. Maximum temperature 15°C.
Wet and sunny on Wednesday, with the rain turning heavy at times. Brighter on Thursday, before more wind and rain moving in from the west during Friday. Above average temperatures.
Northeast
After a cold start, a fine day will develop with plenty of sunny spells, although it will turn slightly cloudier in the south from time to time. Temperatures close to normal, with light winds throughout. Maximum temperature 12°C.
Stay fine overnight, with temperatures falling in persistent clear spells to allow a light frost in rural areas by dawn. Minimum temperature 0°C.
A mostly fine start to Tuesday, and while some sunny spells are expected later, overall it will be a cloudier day, possibly with the occasional spot of rain at the end. Wind strengthening the wind. Maximum temperature 13°C.
Wet and windy Wednesday, but warmer. Drier but cooler conditions should spread from the west on Thursday. Friday maybe starting fine, but getting wet and windy again later.
Northwest
A mostly dry day with plenty of sunny spells, especially across Cumbria. The southernmost parts of the region may remain mostly cloudy with the occasional drizzle on higher ground. Day feeling cool, with a light wind. Maximum temperature 12°C.
Staying mostly dry. Clear periods, although cloud in the south will slowly extend north across the region through the evening and overnight. Cold, but not as cold as the last few nights. Minimum temperature 5°C.
A moderately cloudy day is expected, with limited sunshine. Some light rain and drizzle possible over the hills. Increasingly sunny, with heavy rain coming as we approach overnight. Maximum temperature 14°C.
Wet and sunny on Wednesday, with the rain turning heavy at times. Brighter on Thursday, before more wind and rain moving in from the west during Friday. Above average temperatures.
Scotland
Dry with bright or sunny spells after burning off any early clouds. After a cold start with rural frost in places, it will be milder than the last few days. Maximum temperature 12°C.
It will remain dry through the afternoon and overnight with some clear spells in the east, but becoming cloudier in the early hours. Minimum temperature 2°C.
Stay dry on Tuesday with some bright or sunny spells early in the east, but the cloud will gradually spread eastwards during the day. Maximum temperature 13°C.
The rain spreads north on Wednesday. This clears on Thursday leaving a dry and bright afternoon. Beautiful as another band of rain crosses east into Friday.
Northern Ireland
Stay mainly dry with bright or sunny spells between areas of cloud. Feeling milder than in recent days, the southerly winds are fresh at times around the coast. Maximum temperature 13°C.
Dry with some clear spells through the evening. Staying mainly dry overnight but cloud extending north to be fairly widespread in the morning bringing some scattered light showers. Minimum temperature 6°C.
Remaining cloudy on Tuesday with some sporadic outbreaks of light rain. A few heavier showers spread north through the afternoon and evening. Fresh southerly winds. Maximum temperature 14°C.
Cloudy on Wednesday with occasional, heavy rain at times. Generally drier and brighter on Thursday, but the odd shower is possible. Sunny with another band of rain crossing east into Friday.
Wales
A cloudy and damp start to the morning. Staying on the cloudy side for much of the day, although it will become mostly dry. A few glimmers of brightness can, mainly in the west. Cool feeling under the cloud for the most part. Maximum temperature 14°C.
A dry evening with partly cloudy skies. There will be little change overnight, although there may be a few spots of light rain or drizzle over the hills during the early hours. Minimum temperature 8°C.
A partly cloudy day is expected on Tuesday, with limited brightness. Light rain and patchy drizzle will still be possible over the hills. Turning wetter and windier through the afternoon. Maximum temperature 16°C.
Wet and sunny on Wednesday, with the rain turning heavy at times. Brighter on Thursday, before more wind and rain move in from the west during Friday. Above average temperatures.
