Extreme Heat and Severe Thunderstorms Hit France on June 13, 2025

On June 13, 2025, France is bracing for its hottest day of the year, fueled by a subtropical air mass, as temperatures are expected to soar between 34°C and 36°C in the east, notably in Grand Est and Auvergne-Rhône-Alpes. The day will begin with sunny spells, but instability in the atmosphere will lead to severe thunderstorms, particularly in the northwest regions such as Normandy and western Île-de-France. Morning temperatures will range between 17°C and 20°C, but as the day progresses, three-quarters of the country will surpass 30°C, creating an oppressive heat coupled with high humidity and weak winds.

Severe thunderstorms are forecasted to develop in the late afternoon, resulting in heavy rain, potential hail, and gusty winds reaching speeds of 80-100 km/h. These storms are expected to impact areas like Beauce and Normandy initially, with a risk of spreading into western Île-de-France as the day unfolds. Some regions like Brittany and the Loire are also likely to experience chaotic weather alterations preceding noon, with showers and earlier thunderstorms being a possibility. By contrast, other parts of the country will remain dry but will continue to endure the heat.