Other facts from our historical weather data: Which is the warmest month in Briançon? 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 Briançon? The coldest month is January with an average maximum temperature of -4°C (25°F). Which is the wettest month in Briançon? November tops the wettest month list with 123mm (4.8 in) of rainfall. Which is the driest month in Briançon? August is the driest month with 60mm (2.4 in) of precipitation. 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.