October in Le Grau-Du-Roi is the rainiest month of the year. In October, the weather in Le Grau-Du-Roi is typically warm. Average daily high temperature in October is about 20 degrees above zero. On average, Le Grau-Du-Roi has 12 rainy, 12 sunny, 4 partly cloudy, and 3 cloudy days in October. The rains are usually heavy.