July in Hanover is the hottest month of the year. In July, the weather in Hanover is typically hot. Average daily high temperature in July is about 30 degrees above zero. On average, Hanover has 12 rainy, 9 sunny, 9 partly cloudy, and 1 cloudy day in July. The rains are usually heavy. July as well as January, February, March, and December is considered the most uncomfortable time to visit Hanover.