Other facts from our historical weather data: Which is the warmest month in Storlien? 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 Storlien? The coldest month is February with an average maximum temperature of -2°C (28°F). Which is the wettest month in Storlien? June tops the wettest month list with 137mm (5.4 in) of rainfall. Which is the driest month in Storlien? April is the driest month with 83mm (3.3 in) of precipitation. Which is the sunniest month in Storlien? May is the sunniest month with an average of 239 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.