The upcoming week’s program promises to be loaded. Heat, thunderstorms, violent rains or a hail drop. The scorching episode which is coming to an end this Monday, August 18, will be accompanied by a significant degradation.
On the tenth day of the heat wave, high temperatures are now focusing around the Mediterranean. According to the latest Météo France bulletin published at 6 am on Monday, seven departments in the south of the country are still placed in a heat wave. These are the Pyrénées-Orientales, Aude, Hérault, Gard, Bouches-du-Rhône, Var and Vaucluse. In these departments, the heat will persist: 37 ° C are expected in the afternoon in Montpellier, 36 ° C in Montélimar and 35 ° C in Perpignan.
Elsewhere, if the temperatures remain summer, they are well below the extreme levels experienced by the country on past days. What to breathe. The temperature should reach 29 degrees this Monday afternoon in Paris, Rennes or Reims. A last night from Monday to Tuesday still very hot to live, before the anticyclone positioned on the country bows out. What are certainly raising heatwave vigilance throughout the country from “Tuesday morning”.
In Brittany, degradation is notable this Monday morning with isolated and diffuse thunderstorms. In question, the arrival of a cold drop: a very cold air pocket located more than 5,000 meters above sea level, where there are temperatures located between -20 ° C at -36 ° C. When this phenomenon encounters a warmer time on the ground, disturbances can burst, such as thunderstorms.
According to the Keraunos observatory, it is this phenomenon of cold drop that will intensify the stormy degradation. Events “Sometimes strong», Especially on the Pyrenees, are therefore expected with “Halt and heavy rain”. “The accused rain, expected to be locally important in a short time. A worsening of vigilance is not excluded, in particular on the Gard and the Hérault ”, underlines Météo France.
Under the more violent thunderstorms, hailstorms are to be feared, especially in Midi-Pyrénées, Languedoc and in the south of the Massif Central by going back to Auvergne and Rhône-Alpes.
Tuesday will be the day “The most agitated” of the week, according to the weather channel, with “Storms punctually strongFrom the south of the country to Franche-Comté. Mediterranean regions should be particularly exposed.
The cold drop will gain momentum on Wednesday. Three -quarters of France should be affected by thunderstorms. Corsica and Provence-Alpes-Côte d’Azur will be threatened by the hailstorm. The capital will not escape stormy showers either. Only regions close to Belgium should stay dry.
The drop in temperatures will increase and they will often pass below seasonal averages. The end of the high pressure will cause a drastic drop in temperatures. In Paris, they oscillate Wednesday and Thursday between 21 and 23 degrees. As for the evenings and the nights, they will be curled throughout the territory.
The stormy activity should weaken during the day on Thursday even if it remains under the supervision of forecasters. “Thunderstorms could cause intense rains in a short time. The most exposed areas are the Pyrenees in the Rhône-Alpes, with a possible overflow towards the Mediterranean regions ”announce the experts of the weather channel. Before adding: “The risk oflocal floods cannot be ruled out. “
The return to calm is announced for Friday, with sunny weather spread across the entire territory. According to Météo-France forecasts, it will be up to 32 ° C in Montpellier, 22 ° C in Strasbourg, 21 ° C in Cherbourg-en-Cotentin and 23 ° C in Tours.
In France, 266 weather stations recorded at least once a temperature of 40 ° C or more between August 9 and 12, 2025 included. More than all the second half of the 20th century.
