If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Zumbrota: The hottest months are usually July and August with an average temp of 68°F, while the coldest months are January and February with an average of 22°F. The snowiest months in Zumbrota are January, March, April, and February, with each month seeing an average of 8 inches of snowfall.