July in Kushiro is the cloudiest month of the year. In July, the weather in Kushiro is typically warm. Average daily high temperature in July is about 18 degrees above zero. On average, Kushiro has 13 rainy, 11 cloudy, 6 partly cloudy, and 1 sunny day in July. The rains are usually heavy. July as well as March, April, May, and June is considered the most uncomfortable time to visit Kushiro.