If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Vanderhoof: The hottest months are usually July and August with an average temp of 57°F, while the coldest months are February and December with an average of 20°F. The snowiest months in Vanderhoof are January, February, November, and December, with each month seeing an average of 7 inches of snowfall.