The very northerly position of the Azores anticyclone in a blocking situation and repeated south to southwest flow caused a significant increase of warm air in the month of October 2022 leading the months of the warmest October in France since at least 1946. MeteoNews also seems to have returned to monthly rainfall and sunshine.
October 2022 is very hot. (©Pixabay)
Apart from a few cold mornings between the 4th and 12th, softness and warmth more dominant in the month of October, more so in the second half of the month. Peak heat was reached on the 18th with a national maximum of 33.8 degrees in Orthez and Navarrenx, municipalities in Pyrénées-Atlantiques. Several heat records were broken that day in southwestern France. The days of heat (25 degrees and more) and strong heat (30 degrees and more) are of course more than usual, especially in the southern and western regions.
However, this was not the case in a very large quarter in the northeast: 0 days of heat in Paris against 7 in October 2018 and a record still set at 9 days of heat during the exceptional month of October 1921.
For the national minimum, it was – 1.8 degrees raised in Mourmelon-le-Grand (Marne) and Rueil-la-Gadelière (Eure-et-Loir) on the 9th.
National average temperature in France in October. (© WeatherNews)
Ultimately, October 2022 establishes a new average heat temperature record with 16.9 degrees, or 0.9 degrees above the old record from October 2001 and 2006 (16.0 degrees) and 3.3 degrees above the 1991-2020 normal. So this is the warmest October since at least 1946 (date of installation of a dense meteorological network in France), and even since 1676 when we consider the readings of the oldest weather stations . (Paris), although October 1921 still exceeds 2022 in average maximum temperature. Nights, on the other hand, are noticeably cooler than in October 2022.
Fresh rainfall deficit after September rains
The continuation of rains and storms was not confirmed in October which, on the contrary, was experienced new rainfall deficitdespite some unusually stormy waves for this time of year.
Just 53 mm of rain fell on the monthly national average in France during the month, well below the 1991-2020 normal of 82 mm. The deficit therefore reached 35%. The surface dryness which fell sharply in the second half of September continued at least partially in many regions in October, accentuated by high temperatures.
In Montélimar the heaviest rain with 178 mm. Taking into account the second weather network, Antraigues, in the Ardèche, escaped with 336 mm of rain during the month, including 136 mm on a single day on the 31st.
Montpellier holds the national minimum with only 2 mm. Among the smaller stations, Lagrasse, in the Aude, received only 0.4 mm of rain…
We can also notice a very intense thunderstorm activity for weather with summer-type storms, sometimes accompanied by hail and strong gusts of wind.
Sunday, October 23 was marked by several tornadoes between Normandy and the Belgian border, including one that traveled more than 200 km reaching a maximum force of EF3. The damage was sometimes enormous, especially in the municipalities of Bihucourt, Ervillers and Hendecourt-lès-Cagnicourt.
Despite the high pressure that is often present, sunshine is slightly above its normal for this month of October 2022. In the end the sky is rarely completely blue, interrupted by fairly frequent cirrus clouds and mid -level clouds. Some fogs and stratus also reduced the duration of light here and there.
The monthly national average of 145 hours of sunshine exceeds the 1991-2020 normal of 10 hours (135 hours, a small surplus of 7%).
The maximum is 89 hours in Quimper for the lowest monthly duration, and 260 hours in Ajaccio for the highest.
An exceptionally warm month of October 2022, entering the context of marked global warming in France and Europe, particularly this year. The continuation of the drought after a relative hiatus in September was also in the news, as was a series of tornadoes on the 23rd in the northern region of the country.
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Using MeteoNews. Meteorologist: Frédéric Decker.
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