June in Perth is the cloudiest month of the year. In June, the weather in Perth is typically warm. Average daily high temperature in June is about 14 degrees above zero. On average, Perth has 19 rainy, 5 cloudy, 3 sunny, and 3 partly cloudy days in June. The rains are usually moderate. June as well as January, February, April, and May is considered the most uncomfortable time to visit Perth.