July in Bunbury is the rainiest, the cloudiest, and the coldest 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 16 rainy, 9 sunny, 5 partly cloudy, and 1 cloudy day in July. The rains are usually heavy. July as well as August is considered the most uncomfortable time to visit Bunbury.