July weather forecast in Nagano

July in Nagano is the rainiest month of the year. In July, the weather in Nagano is typically warm. Average daily high temperature in July is about 25 degrees above zero. On average, Nagano has 26 rainy, 3 sunny, and 2 partly cloudy days in July. The rains are usually heavy. July as well as February, March, April, and May is considered the most uncomfortable time to visit Nagano.