Britain's climate is undergoing a significant transformation, with warming trends shifting northward and uphill, according to a new report by the Met Office. Historically cooler northern areas are now experiencing temperatures similar to those in southern England decades ago, while southern regions face even hotter conditions. Extreme heatwaves are becoming the "new normal" across the country.
Mike Kendon, lead author of the State of the UK Climate report, noted that conditions in northern areas now resemble those of Greater London between 1961 and 1990. "Our climate is on the move – literally," Kendon stated, adding that warmer climates are emerging in the southeast and the coldest habitats are disappearing from the tops of northern mountains.
The report analyzed the state of the UK climate in 2025, which was recorded as the hottest year on record for the UK. The last four years are all among the five warmest on record, with warming occurring at a rate of approximately 0.25°C per decade since the 1980s. Researchers anticipate this record will likely be broken again in the coming years.
The impact on temperature extremes is particularly concerning. In parts of the southeast, the hottest day of the year has warmed by 4.5°C, a rate three times that of the annual mean temperature increase. Average summers are now expected to include days reaching 35°C during hot spells. While the UK experienced heatwaves in the past, such as in 1976, temperatures exceeding 30°C were relatively unusual, occurring roughly once every five years. In contrast, the number of days exceeding 30°C has quadrupled in areas like Greater London.
Scientists at Reading University have recorded 15 days exceeding 30°C so far in the current year, surpassing the previous record of 14 days set in 1976. The Reading University Atmospheric Observatory recorded its first 30°C day on May 24, with the threshold being breached an additional 14 times over the following seven weeks. Professor Andrew Charlton-Perez from the University of Reading commented that summers with such heat and dryness, once considered rare, are now becoming far more frequent, posing significant dangers to public health.
The evidence gathered annually reinforces the reality of climate change in the UK, indicating that the climate of the 20th century has effectively ended. The hottest days on record in the UK include 40.3°C on July 19, 2022, in Coningsby, Lincolnshire, and 38.7°C on July 25, 2019, in Cambridge, Cambridgeshire.