Other facts from our historical weather data: Which is the warmest month in Røros? 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 Røros? The coldest month is January with an average maximum temperature of -4°C (25°F). Which is the wettest month in Røros? July tops the wettest month list with 112mm (4.4 in) of rainfall. Which is the driest month in Røros? April is the driest month with 56mm (2.2 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.