July weather forecast in Koriyama

July in Koriyama is the rainiest month of the year. In July, the weather in Koriyama is typically warm. Average daily high temperature in July is about 25 degrees above zero. On average, Koriyama has 27 rainy and 4 sunny days in July. The rains are usually heavy. July as well as February, March, April, and June is considered the most uncomfortable time to visit Koriyama.