After the endless heat waves of the summer, it’s time for a lasting cold anomaly in France: temperatures will drop again next week. We had not experienced such a series of days below average temperatures since last January!
If the news of spring and summer 2022 had been marked by hot air rising from North Africa, the conditions weather reportweather report of this beginning offallfall are radically different: since September 16, France has been constantly confronted with raids ofairair polar! Arctic air will again find itself channeled between an anticyclone located above the Atlantic and a depression over the North Sea. This cold air will have no choice but to plunge directly into France, causing a further drop in temperatures.
Temperatures will be 3 to 5°C below average for saisonsaison, about 2°C less than last week. In Paris, the mercuremercure will not rise above 14 to 15°C on Monday and barely 18°C in Biarritz, i.e. values worthy of the end of October. Next Monday and Tuesday will be the two coolest days of the week. The weather will remain cool, wet and disturbed all week with the return of snow from 1,200-1,400 meters and significant accumulations to be expected (50 cm) in the northern Alps.
A breath of fresh air after 8 months above normal
It’s been a long time since the French were used to such freshness: to find such a series of days below the average for the season, you have to go back to mid-January! Since the end of January, despite a few brief bursts of freshness, temperatures have constantly been above seasonal averages. It had therefore been eight months that temperatures were almost daily above normal. This coolness is not exceptional, even if it is marked: it is in fact closer to normal than the really abnormally high temperatures of summer and early September.
Cold snap in France this weekend due to a flow of polar air
Article of Karine DurandKarine Durandpublished on September 17, 2022
A descent of polar air will affect France this Saturday, with a drop in temperatures of 10 to 15 ° C. Very early frosts may even occur and some will have to turn on the heating again.
After the heat plume which gave rise to more than 120 heat records on Monday September 12, France will be affected by the arrival of polar air this weekend. While last Monday’s temperatures exceeded seasonal averages by 14°C in the south-west of the country, they will this time be 3 to 5°C below normal. No coolness record is expected, but some regions will lose up to 15°C.
Lasting freshness and early frosts on the program
The presence of an anticyclone over the Atlantic and a depression over Poland will channel a flow from the north, with cold air coming from the north pole. The weather will start to cool off this Friday, with the return of snow on the Alps from 1,600 meters. The weekend will be marked by cool weather for the season, combined with a cold wind: 20 to 24°C in the southern half and around 15 degrees in the northern half.
The thermal amplitude (difference in temperatures) between morning and afternoon will be striking. Some white frostswhite frosts Early outbreaks may occur on Saturday and Sunday in the northeast and northwest of the country, as far as Normandy, or even Brittany. The average date of the first frosts is generally around mid-October, so the possible frost this weekend could be a month in advance! This blow of freshness will last almost all week on the northern half, and the inhabitants of the northeast of the country will probably be forced to turn on their heating.