October in Perth is the cloudiest month of the year. In October, the weather in Perth is typically warm. Average daily high temperature in October is about 11 degrees above zero. On average, Perth has 16 rainy, 8 cloudy, 6 partly cloudy, and 1 sunny day in October. The rains are usually heavy. October as well as January, February, March, and April is considered the most uncomfortable time to visit Perth.