🇫🇷France

Continental France extends from 41°20′ to 51°05′N, bordered by the Atlantic Ocean and English Channel to the west and north, the Mediterranean Sea to the south, and the Alps and Pyrenees mountain barriers to the east and south. Key landforms include the Paris Basin, the Massif Central rising to Puy de Sancy at 1,886 m, the Vosges, the Jura, the French Alps crowned by Mont Blanc at 4,805 m—Western Europe's highest peak—the Pyrenees with Vignemale at 3,298 m, and the Mediterranean coast including Corsica.

This topographic diversity produces a strikingly varied climate spectrum: oceanic Cfb dominates the Atlantic west across Brittany, Normandy, and the Gironde; more continental Cfb and Dfb characterize the east around Strasbourg, Dijon, and Nancy; Mediterranean Csa and Csb prevail in the south from Marseille and Nice to Montpellier and Perpignan; alpine ET and EF climates appear on the high Alpine and Pyrenean summits; and cool-temperate upland climates mark the Massif Central and Vosges.

Paris averages 4°C in January and 20°C in July with 640 mm of rainfall distributed evenly through the year. Brest on the Atlantic coast sees 7°C in January and 17°C in July with 1,150 mm of precipitation and frequent winter gales. Marseille exhibits hot Mediterranean conditions at 7°C in January and 24°C in July with only 510 mm of rain and strong Mistral winds funneling down the Rhône valley.

Nice records 9°C in January and 24°C in July with 730 mm of precipitation. Strasbourg displays continental influence at 1°C in January and 20°C in July with 630 mm, while Lyon experiences föhn-like warming effects. Mont Aigoual on the Cévennes records Europe's most extreme rainfall events, including 635 mm in 24 hours at La Lavagne on 8 September 2002.

Major climate events include the 2003 European heatwave with approximately 15,000 deaths and peaks above 44°C, the record summer of 2022 culminating in 46.0°C at Vérargues on 28 June 2019, the 2010 Cévennes flash floods, the 2018 Aude floods, and the 2021 spring frost that affected vineyards across multiple regions.

Our archive covers 54 French cities with daily ERA5 reanalysis data going back to 1940. The warmest July averages occur in Nîmes, around 30.5°C, while Mulhouse records the coldest January nights near −1.1°C. Comparing the last decade against the 1940–1970 baseline, mean temperatures across these cities have risen by about 1.8°C.