May in La Clusaz is the rainiest month of the year. In May, the weather in La Clusaz is typically warm. Average daily high temperature in May is about 13 degrees above zero. On average, La Clusaz has 17 rainy, 10 sunny, and 4 partly cloudy days in May. The rains are usually heavy. May as well as January, February, March, and April is considered the most uncomfortable time to visit La Clusaz.