Other facts from our historical weather data: Which is the warmest month in Hemsedal? July has an average maximum temperature of 17°C (63°F) and is the warmest month of the year. Which is the coldest month in Hemsedal? The coldest month is December with an average maximum temperature of -4°C (25°F). Which is the wettest month in Hemsedal? August tops the wettest month list with 117mm (4.6 in) of rainfall. Which is the driest month in Hemsedal? April is the driest month with 65mm (2.6 in) of precipitation. 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.