From small summer storms to hailstorms accompanied by torrential rains, storms pass but are not alike in France. So that, from one department to another, the bad weather can be much more violent, more dangerous.

Keraunos, the French observatory for tornadoes and violent thunderstorms, lists stormy days in France. “A stormy day is recorded when lightning is detected in France”, specifies the organization, adding that the country has around 240 stormy days per year.

But where are they most violent? In our slideshow below, discover the 10 departments with the most days of strong thunderstorms per year.

When do thunderstorms hit the most in France?

In spring, France records an average of 67.4 stormy days per year:

In summer, France has an average of 78.6 thunderstorm days per year:

In autumn, France has an average of 58.3 thunderstorm days per year:

In winter, France has an average of 38.1 thunderstorm days per year:

You will have understood: it is by far in summer that there are the most storms in the four corners of France, with a maximum of 26.7 days of storms on average in June and July.