Other facts from our historical weather data: Which is the warmest month in Heggenes? 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 Heggenes? The coldest month is December with an average maximum temperature of -4°C (25°F). Which is the wettest month in Heggenes? August tops the wettest month list with 118mm (4.6 in) of rainfall. Which is the driest month in Heggenes? February is the driest month with 54mm (2.1 in) of precipitation. Which is the sunniest month in Heggenes? June is the sunniest month with an average of 243 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.