So 0 C and 20 C are equivalent respectively to 32 Fahrenheit and 68 Fahrenheit. France has a temperate climate , though regional variations are considerable. This kind of temperate climate is characteristic of towns like Rennes, Caen, Lille and Rouen. As you follow the coast south , down toward Bordeaux and Biarritz, the Atlantic climate gets milder and more pleasant.
Rain is still plentiful in the spring, but summers are fine and hot.
The rainfall decreases as we move eastwards inland. So Paris, for example, has much less rain than Rennes. Further east, toward Nancy and Metz, the winters are cold and damp. Strasbourg and Mulhouse, in the Alsace region, enjoy a drier, sunnier climate, but the winters are very cold. In the Massif Central mountains of Central France, the climate is harsh and cold.