August in Fagernes is the rainiest month of the year. In August, the weather in Fagernes is typically warm. Average daily high temperature in August is about 13 degrees above zero. On average, Fagernes has 21 rainy, 6 sunny, 3 partly cloudy, and 1 cloudy day in August. The rains are usually moderate. August as well as April, May, June, and July is considered the most uncomfortable time to visit Fagernes.