In May, the weather in Vilhelmina is typically cold. Average daily high temperature in May is about 9 degrees above zero. On average, Vilhelmina has 14 rainy, 8 cloudy, 5 sunny, and 4 partly cloudy days in May. The rains are usually light. May as well as April, June, July, and August is considered the most uncomfortable time to visit Vilhelmina.