There is a reason movies and songs have the phrase, “April In Paris”. It is simply one of the most beautiful times of the year to visit Paris and many parts of France. The temperature ranges from 15-20 degrees Celsius and the tourists have not yet started to overrun the major cities and popular sites.
January and March were surprisingly nice when I visited. Although cold at times, the sun was out and it was comfortable sitting at a café having a glass of wine. I have been to France a number of times in March and there have been times that the temperature reached 20 degrees.
July and August is high tourist season and it can be incredibly hot, particularly in the south of France. From mid-July to the end of August, the Parisian locals vacate the city to take their holidays and therefore, many businesses, such as restaurants, close. And if you are near a beach or any popular French resort, be prepared for traffic jams, particularly around the Cote d’Azur and Montpellier. One summer while travelling from Avignon westward, I ran into back-to-back traffic on the highway. Summer however, does present many festivals and special events so don’t discount this time of year.
The shoulder seasons, May/June and September/October are lovely because the tourists have left and the locals are back to their daily routines. Oh yes, and the occasional strike. The weather is not so hot but very comfortable, maybe even warm in some areas.