Other facts from our historical weather data: When is winter in Les Allues? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Les Allues? August has an average maximum temperature of 19°C (66°F) and is the warmest month of the year. Which is the coldest month in Les Allues? The coldest month is January with an average maximum temperature of -2°C (28°F). Which is the wettest month in Les Allues? December tops the wettest month list with 150mm (5.9 in) of rainfall. Which is the driest month in Les Allues? October is the driest month with 111mm (4.4 in) of precipitation. Which is the sunniest month in Les Allues? July is the sunniest month with an average of 262 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.