Other facts from our historical weather data: Which months have the greatest rainfall in Zederhaus? Most rainfall (rainy season) is seen in June, July and August. When is winter in Zederhaus? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Zederhaus? 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 Zederhaus? The coldest month is January with an average maximum temperature of -2°C (28°F). Which is the wettest month in Zederhaus? June tops the wettest month list with 165mm (6.5 in) of rainfall. Which is the driest month in Zederhaus? January is the driest month with 77mm (3 in) of precipitation. Which is the sunniest month in Zederhaus? July is the sunniest month with an average of 178 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.