Other facts from our historical weather data: Which months have the greatest rainfall in Obervellach? Most rainfall (rainy season) is seen in June, July and August. When is winter in Obervellach? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Obervellach? 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 Obervellach? The coldest month is January with an average maximum temperature of -2°C (28°F). Which is the wettest month in Obervellach? July tops the wettest month list with 167mm (6.6 in) of rainfall. Which is the driest month in Obervellach? January is the driest month with 69mm (2.7 in) of precipitation. Which is the sunniest month in Obervellach? 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.