If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Tre Ville: The hottest months are usually July and August with an average temp of 55°F, while the coldest months are January and February with an average of 25°F. The snowiest months in Tre Ville are March, February, May, and January, with each month seeing an average of 108 inches of snowfall.