June in Kongsberg is the sunniest month of the year. In June, the weather in Kongsberg is typically warm. Average daily high temperature in June is about 15 degrees above zero. On average, Kongsberg has 17 rainy, 8 sunny, 4 partly cloudy, and 1 cloudy day in June. The rains are usually heavy. June as well as March, April, May, and July is considered the most uncomfortable time to visit Kongsberg.