July in Dunedin is the sunniest and the coldest month of the year. In July, the weather in Dunedin is typically cold. Average daily high temperature in July is about 9 degrees above zero. On average, Dunedin has 10 partly cloudy, 9 rainy, 9 sunny, and 3 cloudy days in July. The rains are usually moderate. July as well as April, May, June, and August is considered the most uncomfortable time to visit Dunedin.