In September, the weather in Waskaganish is typically warm. Average daily high temperature in September is about 14 degrees above zero. On average, Waskaganish has 18 rainy, 6 sunny, 3 cloudy, and 3 partly cloudy days in September. The rains are usually moderate. September as well as January, February, April, and May is considered the most uncomfortable time to visit Waskaganish.