Cliff Notes
- An amber heat health alert has been issued for parts of England, anticipating temperatures of up to 34C on Monday, potentially breaking the June record of 35.6C set in 1976.
- The UK Health Security Agency warns that the alerts, valid from Friday to Tuesday, aim to inform health workers of possible service impacts from the heat.
- Climate change has significantly increased the likelihood of June heatwaves in the South East, making three consecutive days above 28C about ten times more probable than in pre-industrial times.
UK weather: Amber heat health alert issued for England ahead of potentially the hottest June day on record | UK News
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An amber heat health alert has been issued for some parts of England – days before what could be the hottest June day on record.
Sky News weather producer Joanna Robinson said highs of 34C are possible on Monday – with a 20% chance of beating the hottest day in June record of 35.6C from 1976.
The likelihood of a record-breaking temperature on Monday could increase over the weekend as the day approaches.
If the temperature does exceed 35.6C it would make it the hottest start to Wimbledon ever – with the world-famous tennis tournament beginning on Monday.
The highest temperature for the opening day of the tournament so far came on 25 June 2001, with 29.3C at Kew Gardens.
Heatwave criteria are likely to be met in a few places on Sunday and Monday, mainly across parts of central and eastern England.
A heatwave is recorded when an area reaches a certain temperature – the level of which varies across the UK – for three consecutive days.
The UK Health Security Agency (UKHSA) has issued an amber heat health alert for the East Midlands, east of England, London, South East and the South West.
It has also issued a yellow heat health alert for Yorkshire and The Humber and the West Midlands.
Both alerts begin at 12pm on Friday and end at 6pm on Tuesday 1 July.
The UKHSA alerts are designed to warn health and social care workers about possible significant impacts on their services – they are not public weather warnings.
The hot weather will come after unsettled conditions on Thursday which look set to continue on Friday – with heavy rain possible in the West, while the east of England could remain dry, escaping with some sunny intervals.
Warm, humid air is set to linger in the South and East, with maximum temperatures of 27C in eastern England.
Parts of the South and East may also remain very warm, with highs potentially reaching 28C as the muggy air returns.
The wet conditions mean there has been a soggy start to this year’s Glastonbury music festival before highs of 30C are expected across the UK this weekend.
Warms nights have also been forecast for the weekend and going into next week – with temperatures set to be well above average across the UK.
Robinson said there is some uncertainty over how quickly daytime temperatures will start to fall – but it is likely to happen from Tuesday.
She added that June is the first month of summer so higher temperatures are more likely in July and August.
However, a rapid analysis from scientists at World Weather Attribution found that June heatwaves in the South East – where there would need to be three consecutive days of temperatures above 28C – are about 10 times more likely due to climate change compared with the cooler pre-industrial climate.
It comes after 2023 brought the hottest June on record with heatwaves also seen in June 2017 and June 2020.
Last Saturday was the hottest day of 2025 so far, with a provisional temperature of 33.2C recorded in Charlwood, Surrey.
In addition, the Met Office confirmed “many places” in England and “one or two areas” in Wales, including Cardiff, entered a heatwave last Friday.
