July in Adelaide is the rainiest, the cloudiest, and the coldest month of the year. In July, the weather in Adelaide is typically warm. Average daily high temperature in July is about 13 degrees above zero. On average, Adelaide has 12 rainy, 11 partly cloudy, 7 sunny, and 1 cloudy day in July. The rains are usually light. July as well as June and August is considered the most uncomfortable time to visit Adelaide.