Other facts from our historical weather data: Which months have the greatest rainfall in Årfor? Most rainfall (rainy season) is seen in January, February, March, September, October and December. When is winter in Årfor? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Årfor? July has an average maximum temperature of 19°C (66°F) and is the warmest month of the year. Which is the coldest month in Årfor? The coldest month is February with an average maximum temperature of 1°C (34°F). Which is the wettest month in Årfor? September tops the wettest month list with 195mm (7.7 in) of rainfall. Which is the driest month in Årfor? May is the driest month with 104mm (4.1 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.