In September, the weather in Beitostolen is typically cold. Average daily high temperature in September is about 8 degrees above zero. On average, Beitostolen has 13 rainy, 6 cloudy, 6 partly cloudy, and 5 sunny days in September. The rains are usually moderate. September as well as May, June, July, and August is considered the most uncomfortable time to visit Beitostolen.