July in Perth is the rainiest, the cloudiest, and the coldest month of the year. In July, the weather in Perth is typically warm. Average daily high temperature in July is about 15 degrees above zero. On average, Perth has 16 rainy, 12 sunny, and 3 partly cloudy days in July. The rains are usually heavy. July as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most uncomfortable time to visit Perth.