July in Le Grau-Du-Roi is the sunniest and the warmest month of the year. In July, the weather in Le Grau-Du-Roi is typically warm. Average daily high temperature in July is about 26 degrees above zero. On average, Le Grau-Du-Roi has 30 sunny and 1 rainy day in July. The rains are usually light. July as well as June, August, and September is considered the most comfortable time to visit Le Grau-Du-Roi.