Weather can make or break a roadtrip, so here's some data about year-round temperatures in Chisasibi to help you plan yours: The hottest months are usually July and August with an average temp of 54°F, while the coldest months are February and January with an average of 2°F. The snowiest months in Chisasibi are January, March, February, and December, with each month seeing an average of 75 inches of snowfall.