2023-09-05 09:55:00
An episode of hot weather has affected the country since Monday with temperatures reaching 35°C in the south of France.
By VD with AFP Temperature records for the month of September were recorded on Monday, September 4, in several French cities. (Illustration photo) © Mourad ALLILI / MAXPPP Published on 05/09/2023 at 09:55
The meteorological summer is over but an unusual heat encompasses a large part of France this week, unheard of with nearly 39°C in Vienne on Monday and peaks of 35 or 36°C still expected on Tuesday in the center and the southwest of the country. “With an average temperature in France of 25.1°C (the national thermal indicator, average of night and day temperatures over a set of stations representative of the metropolitan territory), this Monday, September 4, 2023 would be the day the hottest observed in September, beating the previous record of 24.7 ° C from September 4, 1949, “wrote Météo-France.
Brest had its hottest day of the whole year 2023, with 30.6 ° C, confirmed the public body, which broke the records. It was 31.5°C on Monday in Paris, the third successive day over 30°C, and the rest of the week should be just as hot there: 34°C is expected on Tuesday afternoon, the hottest day of the week.
Maghreb hot air
Temperature records for the month of September were recorded on Monday in Poitiers (37°C), Cognac (36.5°C), Aix-en-Provence (35.1°C), La Rochelle (34, 5°C), Bourges (36°C) or even Niort which, with 36.6°C, broke its record of September 1961, according to provisional data. Even more impressive: Montmorillon, in Vienne, suffered 38.8 ° C on Monday. But, a sign of climate change, its previous record dated from only last year…
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Tuesday, the maximum will be homogeneous with 30 to 34 ° C on almost the whole country, a little less on Finistère and Corsica. This remarkable warmth for what is technically climatic autumn (which begins in September) is consistent with observations by climatologists that human-caused climate change not only increases the severity of heat waves but also their earlier or late onset.
A return of freshness expected on Sunday
The August heat wave mainly affected a large southern half of the country, reaching a duration and intensity comparable to the historic heat wave of 2003 in the Provence-Alpes-Côte d’Azur and Occitanie regions. Météo-France has not placed France on orange vigilance, as during the heat wave last month, but 43 departments, mainly in the West and the center, have been placed on the first level of vigilance, the color yellow, which warns the inhabitants to be attentive, without further precautions.
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No refreshment is expected until Sunday. “We have hot air sucked in from the Maghreb which has gradually returned to the country, with high pressures which have set in and a blockage situation which will last all week”, explained Frédéric Nathan, forecaster at Météo- France.
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