May in Ålesund is the sunniest month of the year. In May, the weather in Ålesund is typically warm. Average daily high temperature in May is about 10 degrees above zero. On average, Ålesund has 13 rainy, 9 partly cloudy, 8 sunny, and 1 cloudy day in May. The rains are usually light. May as well as January, February, March, and April is considered the most uncomfortable time to visit Ålesund.