This exceeds figures reported on 24 June and, if confirmed via the verification process, would become the new daily maximum air temperature record for the month of June.

This week, a number of other weather stations have also exceeded the previous record of 35.6°C which was reached on 28 June 1976 and 29 June 1957.

Met Office Deputy Chief Meteorologist Greg Wolverson said: "We've seen a new provisional June maximum temperature record for a second consecutive day as the heatwave continues.

"This has been unprecedented heat for the month of June and provides further evidence of how high temperature extremes are becoming increasingly common in the UK as a result of human-induced climate change. There's a chance of this record being challenged again as the warmth moves more markedly east on Friday, before a gradual easing in temperatures through the weekend."

Wales has also provisionally seen a new daily maximum temperature record for June, with 35.9°C at Bute Park, Cardiff, beating the 33.7°C figure reported on 18 June 2020.

Northern Ireland has provisionally equalled its warmest June day on record with 30.8°C at Castlederg putting it level with the peak figure on 30 June 1976.

Night-time temperature records for the month have also provisionally been exceeded. 23.5°C at Bute Park, Cardiff, was the highest minimum temperature on record for the UK in June, with England also seeing a new record with 23.0°C in Plymouth. These figures were reached overnight from Wednesday into Thursday.

There will be a fairly abrupt transition from the heatwave for some, with thunderstorm warnings issued for large parts of the UK over the coming days. While not everyone within the warning areas will see thunderstorms, where they form they could be impactful, bringing gusty winds and the possibility of heavy rain and lightning.

Verifying records

At the conclusion of the heatwave, the verification process will begin for any new national records. The equipment and site will undergo a rigorous validation process before a decision is made on officially inducting any new figures into the meteorological record books.

This process will include site inspections and verification checks of the equipment used to measure the temperature.

In order for a value to be treated as an official national record, the Met Office follows national and international best practice and guidance. If the figure doesn’t meet the required standards, it will be rejected as an official national record.

Find out more about the process with the verification for May’s temperature records.

June heat and climate change

As high temperature records are continuing to be broken, the influence of climate change is under the microscope.

Professor Stephen Belcher CBE, Met Office Chief Scientist, said: “The heatwave this week is a significant weather event, with a Red Extreme Heat warning issued. Human induced climate change has made events like this more likely and more intense.

"To see temperatures like this in the UK in June is sobering. Events like this bring home the implications of climate change, with very high temperatures and humidity bringing significant health implications from heat stress, as well as impacts to a range of sectors such as transport, energy and water supply.”

The frequency and intensity of heatwaves has increased worldwide. Met Office projections indicate that hot spells will become more frequent in our future climate, particularly over the south-east of the UK. Temperatures are projected to rise in all seasons, but the heat would be most intense in summer.

Looking beyond specific heatwaves, the Met Office’s HadUK-Grid dataset shows how June’s mean maximum temperatures have shifted since 1884.

Mean maximum temperature in the UK in June since 1884. ‘Latest’ denotes 2025 figure as June 2026 has not yet concluded.

Mean maximum temperature in the UK in June since 1884. ‘Latest’ denotes 2025 figure as June 2026 has not yet concluded.

Despite year-to-year variability, the average monthly maximum temperature for June has generally been rising and 2023 is the warmest June on record for average maximum temperature.  

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