Taking into account the local weather in Thorens-Glieres can help you maximize your time at the pool during your trip. 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 29°F. The snowiest months in Thorens-Glieres are October, September, May, and December, with each month seeing an average of 5 inches of snowfall.