July in Bunbury is the rainiest, the windiest, and the cloudiest month of the year. In July, the weather in Bunbury is typically warm. Average daily high temperature in July is about 16 degrees above zero. On average, Bunbury has 17 rainy, 9 partly cloudy, and 5 sunny days in July. The rains are usually heavy. July as well as June, August, and September is considered the most uncomfortable time to visit Bunbury.