In May, the weather in Sainte Agathe Des Monts is typically warm. Average daily high temperature in May is about 14 degrees above zero. On average, Sainte Agathe Des Monts has 18 rainy, 5 sunny, 5 partly cloudy, and 3 cloudy days in May. The rains are usually heavy. May as well as January, February, April, and June is considered the most uncomfortable time to visit Sainte Agathe Des Monts.