If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Banff: The hottest months are usually July and August with an average temp of 53°F, while the coldest months are December and February with an average of 14°F. The snowiest months in Banff are February, March, December, and November, with each month seeing an average of 8 inches of snowfall.