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Brits are set to bask in what could be the hottest weather of the year so far, though temperatures are set to tumble as storms move in later in the week.
The temperature could get close to 30C on Sunday – making the UK hotter than amber-list destinations such as Ibiza and Mykonos – with London and the South East tipped to be among the warmest places amid "widespread" heat.
It will be the hottest June 13 on record if the temperature climbs above 28.3C.
England football fans will enjoy a fine day – weather-wise, at least – as they gather at pub beer gardens and sun-drenched spots to watch the country's opening match at Euro 2020.
However, temperatures will be about 10 degrees cooler later in the week when the weather returns to normal and thunderstorms hit Britain.
The map shows a high of 28C but there's a chance the mercury could climb to 29Cor 30C
(Image: Met Office)
A thunderstorm waning will be in effect for most of England and Wales between 6pm on Wednesday and 6am on Friday. Heavy rain, flash flooding, hail, frequent lightning and strong winds are the main threats.
From Thursday, temperatures are expected to peak in the low 20s in the south and the mid teens in the north.
The average maximum temperature for June is about 20C in the south and 17C in the north, according to the Met Office.
The Met Office said thunderstorms will develop on Wednesday and into Thursday.
It said: "The fresher air is then likely to gradually spread to the rest of the country bringing a change to widely cooler more changeable conditions towards the end of the week, with a low risk of warm and humid air returning to the far south-east at times.
People enjoy the sunshine on Brighton beach in East Sussex
(Image: Adam Gerrard/Daily Mirror)
People soak up the son on Wimbledon Common in south-west London on Saturday
(Image: Amer Ghazzal/REX/Shutterstock)
"This will likely bring occasional spells of rain or showers interspersed with drier and sunnier conditions. Overall, temperatures will likely average out to be close to normal."
The Met Office said that the hottest temperature recorded on Saturday was 24.8C at Kew Gardens in London, with 24.6C at Heathrow and St James’s Park as well.
Meteorologist Alex Burkill said that temperatures are expected to rise further on Sunday and could get as high as 29C.
If the mercury climbs above 28.3C it will make it the hottest day of the year so far as well as the hottest June 13 on record, he added.
The hottest temperature recorded so far this year was 28.3C (82.94F) in Northolt, north-west London, on June 2.
But Mr Burkill said it was unlikely that temperatures will go above 30C and added: “We are going to get close tomorrow, it is unlikely we are going to get over 30C – it’s going to be touch and go.
“It will be close as to whether we get to 28.3C tomorrow.
“If we don’t there’s a chance we could get even higher temperatures on Monday when we could get 29C or 30C.
(Image: Met Office)
A thunderstorm warning will be in effect between 6pm on Wednesday and 6am on Friday
(Image: Met Office)
“The top temperatures are going to be towards the London area, but the heat is going to be widespread, it’s not just confined to the South East.”
But Mr Burkill said that while most of the country will have a hot day, the north west of Scotland will have temperatures in the high teens and it will be cloudier with some outbreaks of rain.
Into Monday, he said the weather will split, with the south continuing to see hot temperatures while the north will be cooler.
Mr Burkill added: “We are going to have more of a north-south split.
People enjoy a punt tour along the River Cam in Cambridge on Saturday
“On Monday the heat is going to be largely confined to southern and south-eastern parts of the UK.
“Further north and in Scotland it will be high teens at best. There could be some showers but on the whole it is looking largely dry.”
What is the weather in my area?
London and South East
Very hot and sunny, with the temperature nearing 30C on Sunday.
Another hot day on Sunday with a temperature near 30C.
It will stay very warm with further sunshine Tuesday and initially on Wednesday, but thundery showers are expected to move in later and continue into Thursday.
High of about 26C and largely sunny, with fairly calm winds on Sunday.
Another day of 26C heat on Monday. Staying warm on Tuesday.
Risk of thunderstorms on Wednesday and Thursday, especially in the east of the region.
(Image: Adam Gerrard / Daily Mirror)
Very warm and sunny, with a high of about 27C on Sunday.
Monday's high will be about 28C, though it will become cloudier in the afternoon.
It will stay warm on Tuesday, and thunderstorms are expected to develop on Wednesday and Thursday.
High of 27C with lengthy periods of sun on Sunday.
Monday's high is expected to be a touch lower, at 24-25C, as it becomes cloudier with the odd spot of rain.
Tuesday will stay very warm. Like other regions, there is a risk of thunderstorms from Wednesday.
Yorkshire and Humber
Temperatures will peak at about 27C on Sunday. Risk of the odd shower overnight.
Monday will feel a little fresher with a westerly breeze, the Met Office said. High of about 21C.
Warm sunshine will linger on Tuesday, followed by thundery showers later on Wednesday and Thursday.
Lengthy periods of sunshine and a high of 26C on Sunday. Chance of rain overnight.
Monday will be a bit cooler with a high of 21C and a breeze from the west.
Similar to the south, Tuesday will stay warm before thundery showers arrive on Wednesday.
High of 26C with a lot of sunshine on Sunday. Heavy rain overnight.
It will be largely dry and clear by Monday afternoon and still warm at 19C, the Met Office said.
Tuesday will be mostly dry, followed by rain on Wednesday and Thursday.
It will feel hot or very warm in the sunshine, and the temperature could climb to 25C in places such as Aberdeen or Edinburgh.
Patchy rain in the north-west and heavier rain moving into the Western Isles.
A cold front over northern Scotland will push away on Monday, which will be largely dry and cooler with temperatures in the mid to high teens.
Spells of rain are possible from Tuesday.
A similar story in Wales, with plenty of sun and a high of 26C on Sunday.
Monday will be mostly dry and very warm at 25C, though clouds moving from the north-west could bring some rain.
Another fine day on Tuesday, followed by thundery showers on Wednesday and Thursday.
The Met Office has predicted a maximum temperature of 23C on Sunday with cloud increasing late in the afternoon, bringing a risk of some patchy light rain in the evening.
Monday will be fresher with temperatures "significantly" lower at 17C.
Rain will spread to the west later on Tuesday before clearing eastwards on Wednesday.
Met Office five-day weather forecast
It will be rather cloudy in the north-west and far north with some rain or drizzle, turning heavier in north-west Scotland later.
Elsewhere, a dry day with sunny periods and becoming very warm inland.
Rain moving south-east across northern areas, followed by clear spells and scattered showers.
Central and southern parts dry with clear periods, but low cloud and mist affecting some western coasts.
Sunny and hot in south-east England.
Band of cloud and some rain or drizzle over northern England and Wales sinking south and fading.
Breezy with scattered showers in the north.
Tuesday to Thursday
Fine and dry for most at first, but rain in the north-west on Tuesday.
Very warm or hot in the south with thundery showers developing on Wednesday and into Thursday.