If you're hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Carleton-sur-Mer: 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 18°F. The snowiest months in Carleton-sur-Mer are April, March, January, and February, with each month seeing an average of 31 inches of snowfall.