Weather will likely play an important role when you plan your trip to Lake Louise, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August, with an average temperature of 9°C, while the coldest months are December and February, with an average of -12°C. The snowiest months in Lake Louise are January, February, April and November, with each month seeing an average of 315 cm of snowfall.