If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Canmore: The hottest months are usually July and August, with an average temperature of 12°C, while the coldest months are December and February, with an average of -10°C. The snowiest months in Canmore are February, March, April and December, with each month seeing an average of 20 cm of snowfall.