Other facts from our historical weather data: Which months have the greatest rainfall in Tristach? Most rainfall (rainy season) is seen in June, July and August. When is winter in Tristach? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Tristach? July has an average maximum temperature of 18°C (64°F) and is the warmest month of the year. Which is the coldest month in Tristach? The coldest month is January with an average maximum temperature of -3°C (27°F). Which is the wettest month in Tristach? July tops the wettest month list with 180mm (7.1 in) of rainfall. Which is the driest month in Tristach? January is the driest month with 67mm (2.6 in) of precipitation. Which is the sunniest month in Tristach? July is the sunniest month with an average of 241 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.