In August, the weather in Hemsedal is typically warm. Average daily high temperature in August is about 13 degrees above zero. On average, Hemsedal has 18 rainy, 5 cloudy, 4 sunny, and 4 partly cloudy days in August. The rains are usually heavy. August as well as May, June, July, and September is considered the most uncomfortable time to visit Hemsedal.