Other facts from our historical weather data: Which is the warmest month in Røldal? July has an average maximum temperature of 15°C (59°F) and is the warmest month of the year. Which is the coldest month in Røldal? The coldest month is February with an average maximum temperature of -3°C (27°F). Which is the wettest month in Røldal? January tops the wettest month list with 272mm (10.7 in) of rainfall. Which is the driest month in Røldal? May is the driest month with 111mm (4.4 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.