Other facts from our historical weather data: Which months have the greatest rainfall in Plateau dʼAssy? Most rainfall (rainy season) is seen in January, May, June, July and December. When is winter in Plateau dʼAssy? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Plateau dʼAssy? July has an average maximum temperature of 19°C (66°F) and is the warmest month of the year. Which is the coldest month in Plateau dʼAssy? The coldest month is January with an average maximum temperature of -1°C (30°F). Which is the wettest month in Plateau dʼAssy? December tops the wettest month list with 179mm (7 in) of rainfall. Which is the driest month in Plateau dʼAssy? October is the driest month with 126mm (5 in) of precipitation. Which is the sunniest month in Plateau dʼAssy? 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.