If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Sturgis: The hottest months are usually July and August with an average temp of 69°F, while the coldest months are February and January with an average of 28°F. The snowiest months in Sturgis are December, March, February, and January, with each month seeing an average of 8 inches of snowfall.