UK Weather Maps Predict Up to 27C Heatwave Across Gloucestershire and Southern England in Late May Tuesday, May 12, 2026 uk weather heatwave ecmwf may temperatures gloucestershire metoffice heat climate The UK is bracing for a potential heatwave in late May, with temperatures forecast to rise to as high as 27C. Weather maps from the European Centre for Medium-Range Weather Forecasts (ECMWF) suggest a four-day period of warm … Read More