If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Sandpoint: The hottest months are usually July and August with an average temp of 63°F, while the coldest months are February and December with an average of 27°F. The snowiest months in Sandpoint are January, February, December, and March, with each month seeing an average of 17 inches of snowfall.