Weather is probably a major factor when you plan your trip to La Clusaz, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August with an average temp of 58°F, while the coldest months are January and February with an average of 30°F. The snowiest months in La Clusaz are October, September, May, and December, with each month seeing an average of 5 inches of snowfall.