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UK temperature seen breaking June record as heatwave spreads

Published by Global Banking & Finance Review

Posted on June 22, 2026

2 min read

· Last updated: June 22, 2026

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UK temperature forecast to break June record as heatwave spreads

Extreme Heatwave Conditions and Impact Across Britain

Record-Breaking Temperatures Expected

LONDON, June 22 (Reuters) - Temperatures in Britain are expected to smash records for June later this week, prompting authorities to issue a rare extreme heat warning, as a heatwave hitting western Europe spreads north across the Channel.

The mercury could reach 39 degrees Celsius (102.2 degrees Fahrenheit) by the middle of the week, the country's weather forecaster said on Monday, as part of a four-day heatwave which would easily break the record for June set at 35.6 C in 1957 and later matched in 1976.

Regions Most Affected

The heatwave, covering southern and central England and parts of Wales, could push temperatures above 39 C in some places, the Met said. The hottest temperature ever recorded in Britain was in July 2022 and stands at 40.3 C.

Recent and Historical Weather Records

May and June Records

The June heatwave follows a record-breaking May, when the country recorded its hottest day for the month hitting 35.1 C.

Health and Safety Warnings

Heat-Health Alerts Issued

Issuing only its second ever heat-health alert following one in 2022, the UK Health Security Agency said there was a risk to life for even healthy people, and advised the elderly to take extra care.

Humidity and Nighttime Temperatures

"Humidity is also a factor, making this heatwave even more impactful with heat stress a danger to all," the Met Office said in its statement on Monday, adding that there would also be tropical nights, where temperatures stay above 20 C.

Wider European Impact

Britain's heatwave comes after high temperatures in France led to the deaths of three elderly people and forced schools in parts of the country to shut on Monday, with temperatures forecast to exceed 42 C, while there were also heat alerts for parts of northern Spain.

Preparedness and Response

Hospitals, schools and trains in England and Wales will all be braced for the impact of extreme heat. During past heatwaves people have been advised to stay at home instead of travelling, while some schools have shut early.

Forecast for the Coming Days

Conditions in Britain are expected to cool slightly to about 32 C by Friday.

(Reporting by Sarah Young; editing by William James)

Key Takeaways

  • The Met Office has issued a rare red weather warning for extreme heat—first since July 2022—for London, much of southeast England, parts of the Midlands and Wales, as temperatures may reach 38 °C and challenge June’s record high of 35.6 °C. (walthamforestecho.co.uk)
  • Long-range forecasts flagged elevated risk for a scorching summer, with multiple episodes of 38 °C+ anticipated and climate drivers such as El Niño, warm North Atlantic sea-surface temperatures, and atmospheric ridging creating conditions comparable to July 2022’s record heat. (nationalherald.co.uk)
  • The UK Heat‑Health Alert system, operated jointly by UKHSA and the Met Office, has activated its second-ever high-level alert for June—indicating risk even to healthy individuals—and urges extra precautions, especially for vulnerable populations, amid expected tropical nights and health threats from humidity. (gov.uk)

References

Frequently Asked Questions

What temperature is the UK expected to reach during the June heatwave?
Temperatures in the UK may reach up to 39 degrees Celsius, potentially smashing previous June records.
When was the previous June temperature record set in the UK?
The previous June record was 35.6°C, set in 1957 and matched in 1976.
What warnings have authorities issued due to the heatwave?
Authorities have issued an extreme heat warning and a second-ever heat-health alert due to risks to life for even healthy people.
How is the heatwave impacting public services in the UK?
Hospitals, schools, and trains are preparing for extreme heat; during past heatwaves, some schools have shut early and the public has been advised to stay home.
How does this UK heatwave compare to weather in other parts of Europe?
The UK heatwave follows record temperatures in France, which led to deaths and school closures, with temperatures forecast above 42°C in parts of Europe.

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