July in Shirahama is the rainiest and the cloudiest month of the year. In July, the weather in Shirahama is typically warm. Average daily high temperature in July is about 23 degrees above zero. On average, Shirahama has 18 rainy, 7 cloudy, 3 sunny, and 3 partly cloudy days in July. The rains are usually heavy. July as well as January, February, March, and April is considered the most uncomfortable time to visit Shirahama.