A new report has concluded that the United Kingdom's climate has fundamentally changed, marking a clear break from the conditions the country experienced through the last century. According to the Met Office, which produced the report, the finding is drawn from observations gathered at weather stations across the UK, measuring temperature and other variables at the land surface, in the places where people actually live and experience the weather every day.
The strength of the conclusion rests on how far back the records go. According to the report, the observations stretch back to Victorian times, giving a long-term context that spans well over a century. Against that backdrop, a senior climate scientist at the Met Office said it was very clear that, in terms of temperature, the climate of the twentieth century has now gone, replaced by something substantially different.
The headline finding centres on how hot last year was. According to the report, last year was the warmest year on record for the UK, and it included both the warmest spring and the warmest summer on record, in a series that goes back to 1884. The Met Office noted that this was the sixth time so far this century that the country has set a new warmest-year record, underlining how frequently these milestones are now falling.
The pace of the change was also spelled out in figures. According to the Met Office, the UK is warming at about a quarter of a degree per decade, and the country is now a degree and a third warmer than it was in the 1961 to 1990 period. A senior climate scientist framed that shift by noting that the range of climates across the whole of the UK spans only about eight degrees, so the warming already represents a sixth of that entire span.
It is the extremes, rather than the averages, that are shifting the most. According to the report, the hottest day of the year in parts of south-east England has warmed three times more than the annual mean temperature, meaning the peaks of the summer are climbing far faster than the typical conditions. The Met Office said that what used to be considered extreme is increasingly being treated as normal, while what was once normal is now thought of as cold.
The pattern is playing out in real time this year. According to the report, the UK is currently within its third heatwave of 2026, and it has already smashed both its May and its June station temperature records. The Met Office pointed out that, by contrast, in one in five years during the twentieth century the country did not reach even thirty degrees anywhere at all across the whole year.
The report also set out why the change matters beyond the numbers. According to the Met Office, much of the country's infrastructure, its built environment, its hospitals and its agriculture were designed around a twentieth-century climate that no longer exists. A senior climate scientist warned that the current conditions are not necessarily where the country will settle, and that the Met Office's projections point to continued warming, with the scale depending on how much more greenhouse gas is emitted.