Taking into account the local weather in Downtown Squamish is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually August and July with an average temp of 57°F, while the coldest months are February and December with an average of 34°F. The snowiest months in Downtown Squamish are January, February, March, and December, with each month seeing an average of 7 inches of snowfall.