England has officially recorded its warmest June since temperature records began, according to provisional data released by the Met Office. This unprecedented warmth was significantly influenced by a searing heatwave towards the end of the month, which saw a red extreme heat warning issued for three consecutive days across parts of the UK for the first time since the system's introduction in 2021.
While England bore the brunt of the record-breaking heat, Wales and the UK as a whole also experienced their second-warmest June since 1884. Dr Emily Carlisle, a Met Office scientist, noted that June's high temperatures are part of a broader trend, with five of the first six months of the year recording mean temperatures at least 1°C above average. This followed England and Wales's warmest spring on record, and the third-warmest for the UK overall. Notably, Kew Gardens in Greater London registered an exceptional 35.1°C in May, surpassing previous May records for both the station and the UK.
The latter half of June was particularly marked by exceptionally warm nights, often referred to as 'tropical nights,' where temperatures failed to drop below 20°C. Across the UK, June 2026's minimum temperature was more than 2°C above average, with England experiencing overnight temperatures 2.6°C higher than usual. These persistent high overnight temperatures can exacerbate health risks, as the body struggles to cool down.
Professor Stephen Belcher CBE, the Met Office chief scientist, underscored the gravity of the situation, stating, 'June’s heatwave was 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.' He added that such events '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 Met Office's projections indicate a future where hot spells become more frequent and intense, particularly in the south-east of the UK, with temperatures expected to rise across all seasons. This aligns with global trends of increasing heatwave frequency and intensity. Further analysis by Dr Christopher Callahan, a climate scientist at Indiana University, suggests that a recent European heatwave resulted in over 20,000 deaths, with an estimated 862 excess deaths in the UK between 22 and 28 June, based on a rapid modelling study using peer-reviewed methods.
These findings reinforce the scientific consensus on the accelerating impact of climate change on extreme weather events. The Met Office's role in providing detailed meteorological data and projections is crucial for understanding these changes and informing adaptation strategies across various sectors in the UK.