Other facts from our historical weather data: Which is the warmest month in Sisimiut? July has an average maximum temperature of 10°C (50°F) and is the warmest month of the year. Which is the coldest month in Sisimiut? The coldest month is February with an average maximum temperature of -13°C (9°F). Which is the wettest month in Sisimiut? September tops the wettest month list with 73mm (2.9 in) of rainfall. Which is the driest month in Sisimiut? March is the driest month with 37mm (1.5 in) of precipitation. Which is the sunniest month in Sisimiut? July is the sunniest month with an average of 255 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.