When you travel with your pet, keeping tabs on the weather can help you make the trip more safe and fun for everyone. 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 17°F. The snowiest months in L'Ancienne-Lorette are January, March, November, and April, with each month seeing an average of 19 inches of snowfall.