Other facts from our historical weather data: Which months have the greatest rainfall in Schmirn? Most rainfall (rainy season) is seen in May, June, July and August. Which is the warmest month in Schmirn? 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 Schmirn? The coldest month is January with an average maximum temperature of -3°C (27°F). Which is the wettest month in Schmirn? July tops the wettest month list with 197mm (7.8 in) of rainfall. Which is the driest month in Schmirn? January is the driest month with 80mm (3.1 in) of precipitation. Which is the sunniest month in Schmirn? 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.