Other facts from our historical weather data: Which is the warmest month in Lanslebourg-Mont-Cenis? July has an average maximum temperature of 17°C (63°F) and is the warmest month of the year. Which is the coldest month in Lanslebourg-Mont-Cenis? The coldest month is January with an average maximum temperature of -5°C (23°F). Which is the wettest month in Lanslebourg-Mont-Cenis? November tops the wettest month list with 134mm (5.3 in) of rainfall. Which is the driest month in Lanslebourg-Mont-Cenis? February is the driest month with 93mm (3.7 in) of precipitation. Which is the sunniest month in Lanslebourg-Mont-Cenis? July is the sunniest month with an average of 260 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.