July in Aix-en-Provence is the sunniest and the hottest month of the year. In July, the weather in Aix-en-Provence is typically hot. Average daily high temperature in July is about 30 degrees above zero. On average, Aix-en-Provence has 24 sunny, 4 partly cloudy, and 3 rainy days in July. The rains are usually light. July as well as June, August, and September is considered the most comfortable time to visit Aix-en-Provence.