UK Summer 2026 Marked by Widespread Heat and Drought, Data Reveals

The United Kingdom experienced a summer characterized by widespread heatwaves and drought conditions in 2026, according to an analysis of Met Office data. While most of the UK felt the effects of these conditions, temperature and rainfall levels varied across different regions.

The HadUK Grid dataset, a key product from the Met Office Hadley Centre used for monitoring climate change, underpins this analysis. This dataset provides temperature and rainfall data across a uniform grid covering the UK's landmass, with the exception of the Channel Islands. Each data point represents an estimate for the center of a 1km by 1km grid box, offering the most detailed publicly available climate data for the nation.

To generate localized data, the system averages the values from a grid area and its nearest neighbors. For most locations, this results in a 5km square average. Along coastlines and on smaller islands, the nearest grid cells are selected to conform to the shape of the landmass, ensuring no cells are further than 7km away. This methodology aims to smooth out potential sharp variations between adjacent areas while still capturing local weather conditions.

The data for 2026 is considered provisional due to lags in data availability, meaning precise figures may be subject to minor adjustments as more observations are processed. Historical averages used for comparison are calculated over a 30-year period from 1991 to 2020, aligning with the standard used by the World Meteorological Organization.

The average temperature for a given period is the mean across the selected grid cells. Maximum temperature is calculated as the mean of the daily maximums recorded in the nearest grid cells, and minimum temperature similarly uses the mean of daily minimums. Rainfall figures represent the total amount for the month or season, averaged across the selected grid cells.