August in La Rochelle is the warmest month of the year. In August, the weather in La Rochelle is typically warm. Average daily high temperature in August is about 23 degrees above zero. On average, La Rochelle has 14 sunny, 8 rainy, 7 partly cloudy, and 2 cloudy days in August. The rains are usually light. August as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit La Rochelle.