Other facts from our historical weather data: Which is the warmest month in Montchavin? 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 Montchavin? The coldest month is January with an average maximum temperature of -4°C (25°F). Which is the wettest month in Montchavin? December tops the wettest month list with 152mm (6 in) of rainfall. Which is the driest month in Montchavin? August is the driest month with 99mm (3.9 in) of precipitation. Which is the sunniest month in Montchavin? 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.