In March, the weather in Parry Sound is typically cold. Average daily high temperature in March is about 1 degree above zero. On average, Parry Sound has 10 partly cloudy, 9 sunny, 4 rainy, 4 snowy, and 4 cloudy days in March. The rains are usually moderate. March as well as April, October, November, and December is considered the most uncomfortable time to visit Parry Sound.