July in Hamar is the rainiest and the warmest month of the year. In July, the weather in Hamar is typically warm. Average daily high temperature in July is about 19 degrees above zero. On average, Hamar has 16 rainy, 8 partly cloudy, 4 sunny, and 3 cloudy days in July. The rains are usually heavy. July as well as April, May, August, and September is considered the most uncomfortable time to visit Hamar.