Other facts from our historical weather data: When is winter in Saint-Jean-dʼArves? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Saint-Jean-dʼArves? 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 Saint-Jean-dʼArves? The coldest month is January with an average maximum temperature of -1°C (30°F). Which is the wettest month in Saint-Jean-dʼArves? June tops the wettest month list with 155mm (6.1 in) of rainfall. Which is the driest month in Saint-Jean-dʼArves? March is the driest month with 117mm (4.6 in) of precipitation. Which is the sunniest month in Saint-Jean-dʼArves? July is the sunniest month with an average of 288 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.