Other facts from our historical weather data: When is winter in Sestriere? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Sestriere? 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 Sestriere? The coldest month is January with an average maximum temperature of -2°C (28°F). Which is the wettest month in Sestriere? June tops the wettest month list with 127mm (5 in) of rainfall. Which is the driest month in Sestriere? February is the driest month with 76mm (3 in) of precipitation. Which is the sunniest month in Sestriere? July is the sunniest month with an average of 260 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.