In May, the weather in Beitostolen is typically cold. Average daily high temperature in May is about 5 degrees above zero. On average, Beitostolen has 17 rainy, 9 cloudy, 3 sunny, and 2 partly cloudy days in May. The rains are usually moderate. May as well as June, July, August, and September is considered the most uncomfortable time to visit Beitostolen.