Taking into account the local weather in Saint-Siméon is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually July and August with an average temp of 62°F, while the coldest months are January and February with an average of 19°F. The snowiest months in Saint-Siméon are March, January, February, and April, with each month seeing an average of 27 inches of snowfall.