July in Kongsberg is the warmest month of the year. In July, the weather in Kongsberg is typically warm. Average daily high temperature in July is about 18 degrees above zero. On average, Kongsberg has 17 rainy, 8 sunny, and 6 partly cloudy days in July. The rains are usually heavy. July as well as March, April, May, and June is considered the most uncomfortable time to visit Kongsberg.