Other facts from our historical weather data: When is winter in Barcelonnette? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Barcelonnette? August has an average maximum temperature of 20°C (68°F) and is the warmest month of the year. Which is the coldest month in Barcelonnette? The coldest month is January with an average maximum temperature of -1°C (30°F). Which is the wettest month in Barcelonnette? November tops the wettest month list with 127mm (5 in) of rainfall. Which is the driest month in Barcelonnette? 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.