December in La Clusaz is the windiest month of the year. In December, the weather in La Clusaz is typically cold. Average daily high temperature in December is about 3 degrees above zero. On average, La Clusaz has 12 rainy, 11 sunny, and 8 partly cloudy days in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit La Clusaz.