Where and when storms occur in France?

In most areas, thunderstorms occur most often during the months of June, July and August. The south-east of France is an exception: storms are often more numerous in September or in October and November for Corsica.

On the whole year, thunderstorms are more frequent in Corsica and southern Aquitaine. There are on average more than thirty days per year with thunderstorms. On the north of Aquitaine, Midi-Pyrenees, the relief of the Provence-Alpes-Cote d’Azur, Limousin, Auvergne, Rhone-Alpes, the south of Burgundy, Franche-Comte, l ‘Alsace and Lorraine, thunderstorms each year are also relatively high. On the rest of the country, they are less frequent, even on rare Brittany.

For the sole summer period (June-July-August), the distribution is a little different. In summer, thunderstorms are frequent and much more in Corsica than in the Parisian region. Especially on an axis Sud-ouest/Nord-est and the Alpine regions that are most frequent summer thunderstorms. There are generally each of these regions were fifteen to twenty days with thunderstorms. As for the whole year, it is in Britain they are increasingly rare in summer, with an average of less than five days with storms.