Other facts from our historical weather data: Which months have the greatest rainfall in Zell am Ziller? Most rainfall (rainy season) is seen in May, June, July and August. When is winter in Zell am Ziller? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Zell am Ziller? 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 Zell am Ziller? The coldest month is January with an average maximum temperature of -1°C (30°F). Which is the wettest month in Zell am Ziller? June tops the wettest month list with 202mm (8 in) of rainfall. Which is the driest month in Zell am Ziller? January is the driest month with 88mm (3.5 in) of precipitation. Which is the sunniest month in Zell am Ziller? 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.