You’ll likely spend much of your trip indoors, but if you want to see more of the area, looking at local weather trends is a good idea. The hottest months are usually August and July with an average temp of 55°F, while the coldest months are December and February with an average of 27°F. The snowiest months in Whistler are January, March, December, and February, with each month seeing an average of 30 inches of snowfall.