July in Mosjoen is the warmest month of the year. In July, the weather in Mosjoen is typically warm. Average daily high temperature in July is about 14 degrees above zero. On average, Mosjoen has 18 rainy, 5 sunny, 5 cloudy, and 3 partly cloudy days in July. The rains are usually heavy. July as well as April, May, June, and August is considered the most uncomfortable time to visit Mosjoen.