July in Aix-en-Provence is the sunniest and the warmest month of the year. In July, the weather in Aix-en-Provence is typically warm. Average daily high temperature in July is about 27 degrees above zero. On average, Aix-en-Provence has 30 sunny and 1 rainy day in July. July as well as June, August, and September is considered the most comfortable time to visit Aix-en-Provence.