Winter: December-February. You can save a lot if you visit Aix-en-Provence in the winter season as there are hardly any tourists and hotels slash their rates or offer upgrades. Weather in Aix-en-Provence rarely drops below 0 degree Celsius.
Summer: June to August. These months experience great weather and are the high tourist months. Hotels are packed and everything is pricey, so avoid going in this season.
The best time to visit Aix-en-Provence is spring (March, April May) and fall (September, October and November).