EuroWire, EXETER: Much of the United Kingdom was set to experience the warmest weather of the year on Wednesday, with the Met Office forecasting temperatures as high as 26 degrees Celsius after several days of unseasonably mild conditions. The agency said low to mid 20s would be widely recorded across England and Wales, while parts of Scotland and Northern Ireland were also expected to turn warmer. The spell follows a mild end to March and marks a sharp rise from typical early April temperatures across large parts of the country.
The peak warmth was expected in the south and east of England, with London and surrounding areas forecast to reach 26C, while some western districts were also due to record temperatures above 20C. Regional forecasts showed parts of eastern England reaching about 24C, matching the level highlighted in earlier coverage of the warm spell. Forecasters said sunshine would be widespread for many areas on Wednesday before a change in conditions begins later in the day from the west, bringing more cloud and some showers.
The warm burst comes after the Met Office said March 2026 ranked as the joint tenth warmest March on record for the UK. The agency also said 20.9C was recorded in Pershore, Worcestershire, on March 31, which had stood as the joint warmest day of the year before this week’s rise in temperatures. That backdrop made the early April spell notable not only for its daily highs but also for how quickly temperatures climbed above seasonal averages across several regions of the country.
Warm spell peaks before abrupt change
The Met Office said the very warm conditions would be short lived, with cooler and more changeable weather expected from Thursday as Atlantic air moves in. Chief Forecaster Paul Gundersen said some locations could see daytime temperatures fall by around 10C between Wednesday and Thursday. Forecast charts for Thursday showed a broader spread of showers and lower temperatures than the previous day, ending the brief spring surge and returning many areas to conditions closer to the seasonal norm after the midweek peak.
Forecasters also flagged a health and environmental impact from the warmth, saying pollen levels were expected to be very high across much of England and Wales for several days. High pollen levels were also forecast for Scotland and Northern Ireland before easing later in the week as cooler air arrives. The combination of dry weather, sunshine and rising temperatures has supported the spread of spring allergens, adding another practical consequence of the warm spell for households, commuters and people with seasonal respiratory sensitivity.
Forecast highlights regional contrast and frost risk
While Wednesday was expected to bring the highest temperatures of the week, the Met Office said the transition later on Thursday would leave some parts of the UK facing a markedly different feel by night. As showers clear and colder air settles in, there is a risk of overnight frost in some places, underscoring the rapid swing in conditions. That contrast between near summerlike daytime warmth and the return of chilly nights reflects the volatile character of British spring weather, particularly during clear and calm periods after frontal systems pass.
For now, the warmest day of 2026 was expected to be measured on Wednesday as the UK reaches the peak of the current spell before cooler air resets the pattern. The latest official outlook indicates that some places will top 24C and others will rise to 26C, overtaking the previous high for the year set at the end of March. With the warm conditions likely to fade quickly, the midweek surge stands out as a brief but significant weather event in the opening weeks of spring.