October in Parry Sound is the rainiest month of the year. In October, the weather in Parry Sound is typically warm. Average daily high temperature in October is about 11 degrees above zero. On average, Parry Sound has 18 rainy, 5 sunny, 4 cloudy, and 4 partly cloudy days in October. The rains are usually heavy. October as well as March, April, and November is considered the most uncomfortable time to visit Parry Sound.