“An average temperature of 21.5 degrees” over the first 24 days of September. Either “between 3.5 and 3.6 degrees“ above seasonal averages over the period 1990-2020, announces climatologist Christine Berne, interviewed during a press conference Friday September 29, 2023, reportsAFP. “September 2023 is the hottest September ever measured in mainland France, with an average temperature well above normal.also notes Meteo France Friday September 29, 2023. A season which, moreover, follows two consecutive years marked by temperatures well above seasonal norms. This month which heralds autumn, usually synonymous with a drop in temperatures and the return of the rains, played into summer extensions, with 35 to 37 degrees reached in certain regions at the start of the month. This is partly explained by “an exceptional late heatwave”which appeared at the end of August throughout the country. “A really very important march”according to the expert, who also attributes this exceptional mercury to the heat dome present over the southern half of Europe. Like a lid placed on a boiling pot, the heat dome produces a rapid rise in temperatures, until the scalding water, the heat, causes the container to boil over, the site explains. Europe 1Monday July 17, 2023.
34° expected in Toulouse
These exceptional temperatures for the month of September are obviously one of the concrete results of climate change in progress. As demonstrated by the models proposed by the IPCC experts – the UN climate experts –, Christine Berne further specifies: “Climate change favors an extension of heat waves towards (…) spring and around September, or even early October”. And at the start of October 2023, the heat will indeed continue. Scorching temperatures will be felt in particular on Sunday October 1, 2023 in the South-West region. In Toulouse, 34 degrees are expected, or a mercury of 10 degrees above seasonal averages. However, from Tuesday October 3, 2023, the weather should gradually become more autumnal.