If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Wixom: The hottest months are usually July and August with an average temp of 68°F, while the coldest months are February and January with an average of 28°F. The snowiest months in Wixom are January, March, November, and December, with each month seeing an average of 10 inches of snowfall.