July in Tosu is the sunniest and the warmest month of the year. In July, the weather in Tosu is typically warm. Average daily high temperature in July is about 22 degrees above zero. On average, Tosu has 16 partly cloudy, 9 sunny, 3 rainy, and 3 cloudy days in July. The rains are usually light. July as well as June is considered the most comfortable time to visit Tosu.