As the bridge of May 1, 2025 approaches, the weather promises to be very mild with temperatures that could recall those of summer. “We are moving towards what is called an omega blocking, named after the Greek letter to horseshoe”explains the meteorologist Yann Amice on Acti.fr. This atmospheric phenomenon should establish a stable and stationary time from this Sunday, April 27 with an anticyclone which will force the surrounding depressions to bypass it.
This configuration will promote the rise in very hot air from North Africa which will increase temperatures, especially in the southwest where the bar 30 ° C could be crossed on Tuesday, April 29.
This anticyclonic blockage extends from the Azores to the British Islands since April 24 and it creates an axis of high pressures dominating France. If a low disruption should cross the western half of the country this Saturday, April 26 (with a little rain and a few thunderstorms), it should quickly escape to make way for a generous sun and to an increase in temperatures for several days, before a possible return of thunderstorms.
May and June will be stormy
However, as specified The weather channelyou should not expect dry conditions all the month of May. If a summer overview is expected next week, wet and unstable conditions should win by the end of May. The week from April 28 to May 4 promises to be very pleasant and spring but the following week (from May 5 to 11) will be more unstable and stormy.
The scenarios envisage the presence of cold drops which could cause stormy showers, even if no aggravating scenario is planned for the moment, explain the experts. The north of France should benefit from a more pleasant time but with cooler temperatures than the previous week. The period of ice saints (May 11-13) should not experience frosts, which is good news for gardeners.
The hottest spring
These developments are part of a broader trend observed for several years: Météo France recalls that The hottest four spring since 1900s all took place in the 21st century With heat waves that occur earlier and earlier in the year while gel periods are rarer.
According to seasonal forecasts, Temperatures for the months of May, June and July 2025 should remain greater than seasonal normal, with an average difference of +1 to +2 ° C. Precipitation will also be very unevenly distributed with more rain in the south, which is a sign of a strong summer storm trend which could limit the risk of drought.
The weather channel also stresses that the month of May promises to be “unstable in the south, with temperatures without excess” while that June should be warmer and stormyespecially in the southwest. This alternation between anticyclonic periods and more unstable phases reflects the complexity of current meteorological models.
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