Taking into account the local weather in Saint-Jacques 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 61°F, while the coldest months are January and February with an average of 16°F. The snowiest months in Saint-Jacques are February, January, March, and December, with each month seeing an average of 46 inches of snowfall.