July in Sainte Agathe Des Monts is the warmest month of the year. In July, the weather in Sainte Agathe Des Monts is typically warm. Average daily high temperature in July is about 21 degrees above zero. On average, Sainte Agathe Des Monts has 17 rainy, 10 sunny, and 4 partly cloudy days in July. The rains are usually heavy.