Other facts from our historical weather data: Which months have the greatest rainfall in Gerlosberg? Most rainfall (rainy season) is seen in May, June, July and August. When is winter in Gerlosberg? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Gerlosberg? July has an average maximum temperature of 19°C (66°F) and is the warmest month of the year. Which is the coldest month in Gerlosberg? The coldest month is January with an average maximum temperature of -2°C (28°F). Which is the wettest month in Gerlosberg? June tops the wettest month list with 199mm (7.8 in) of rainfall. Which is the driest month in Gerlosberg? January is the driest month with 86mm (3.4 in) of precipitation. Which is the sunniest month in Gerlosberg? May is the sunniest month with an average of 185 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.