Other facts from our historical weather data: Which months have the greatest rainfall in Les Houches? Most rainfall (rainy season) is seen in January, May, June, July and December. When is winter in Les Houches? The coldest season / winter is in the following months: January, February, November and December. Which is the warmest month in Les Houches? July has an average maximum temperature of 18°C (64°F) and is the warmest month of the year. Which is the coldest month in Les Houches? The coldest month is January with an average maximum temperature of -3°C (27°F). Which is the wettest month in Les Houches? December tops the wettest month list with 175mm (6.9 in) of rainfall. Which is the driest month in Les Houches? October is the driest month with 121mm (4.8 in) of precipitation. Which is the sunniest month in Les Houches? July is the sunniest month with an average of 275 hours of sunshine. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.