Why is it autumn in summer in Pays-de-la-Loire and Brittany?



“It won’t be long before we turn the heat back on …” or “We’d have a little raclette tonight, right?” ”, These self-deprecating and self-deprecating remarks“ rain ”in the west of France. For almost three weeks, holidaymakers must have had the astonishing impression of camping in the middle of November. And it’s not just an impression. “We have almost fall conditions, admits Steven tual, weather forecaster at
Brittany weather. The most incredible thing is that the drought worried us in May, the only month of June made it possible to avoid this risk. “

In our two regions, June was also a very mixed month. The first fortnight augured for a scorching summer… “From June 13 to 16, even if the temperature records have not fallen. [il avait fait encore plus chaud en juin 2019 et 2017], we still exceeded in places 32 ° C in Pays-de-la-Loire (31.1 ° C in La Roche-sur-Yon on June 15), 31 ° C in Morbihan (31, 3 ° C in Camors on June 14), close to 30 ° C in Finistère (29.1 ° C in Saint-Segal on June 13) or in Côtes d’Armor (29.9 ° C in Merdrignac on June 13 ) ”, Develops Météo-France.

The fault of “small cold drops”

Then, suddenly (mid-June), we had to bring out the sweaters and especially the raincoats. Why ? “Because anticyclones and depressions circulate at low altitudes, which creates an accumulation of small cold drops,” explains Steven Tual of Brittany weather. We then have a cool temperature anomaly. “

This does not mean that the average temperature in June in Brittany and Pays-de-la-Loire is catastrophic. “We are below the standard, but the first fortnight made up for this significant drop. “In Nantes, in June, it will still be 24.1 ° C on average, 1.4 ° C above the norm. In Rennes, 22.5 ° C (with 15.4 ° C on June 22, accompanied by no minute of sun!).

It rained more in Maine-et-Loire than in Brest!

In terms of rainfall, no records either, but great sauces in the West. As in Rennes, in the month of June, where 134 mm fell almost only in the second half of June (47 mm on average in normal times). “This is a historic record since the post-war period,” according to Météo Bretagne. Or 89 mm in Nantes (43 mm on average normally in June) and 86 mm in La Roche-sur-Yon (multiplied by two compared to the standard). In Maine-et-Loire, Météo-France indicates that “with 145 mm in June, we are four times an average month of June! “. On the other hand, strangely, little rain in Finistère in June, with 46.2 mm in Brest and only 30.2 mm in Ploudalmézeau.

The great good weather is coming in ten days!

Early July continues at the same pace… rainy. “Low pressure systems are circulating at the moment, there are permanent disturbances in the northwest, observes Brittany weather. This week will still not be terrible, even mediocre this Monday and Tuesday. »It could be a little better (everything is relative) from Thursday and Friday… Drum roll. “The great good weather is expected from July 15, predicts Steven Tual. The high pressures seem to be coming back. “

As for a possible heat wave (I see you curse from here), “what has been happening for three weeks does not mean anything and does not mean that we will not have strong heat at the end of July or in August”, according to Brittany weather. “The forecasts for July, August and September give a more likely scenario of warmer and drier than normal weather,” said
Lionel salvayre of the Interregional West Department of Météo-France.

And if you are tired of putting on a little wool in July in the morning, just have a thought for the Sevillians (Spain) who will have to withstand 49 ° C next Sunday …



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