In May, the weather in Hemavan is typically cold. Average daily high temperature in May is about 4 degrees above zero. On average, Hemavan has 11 cloudy, 8 partly cloudy, 6 rainy, 4 sunny, and 2 snowy days in May. The rains are usually heavy. May as well as June, July, August, and September is considered the most uncomfortable time to visit Hemavan.