If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Carnelian Bay: The hottest months are usually July and August with an average temp of 62°F, while the coldest months are December and February with an average of 31°F. The snowiest months in Carnelian Bay are March, February, January, and December, with each month seeing an average of 39 inches of snowfall.