About Cottage Grove, MN's Climate & Weather History

Cottage Grove, in Minnesota, United States, is home to roughly 35,900 people in the Central Time Zone at 44.8°N latitude.

In 2025, Cottage Grove recorded an average annual temperature of 46°F — about 0.6°F below the 30-year normal of 47°F. The hottest day reached 92°F in June; the coldest was -21°F in January. Total precipitation was 45 inches (wetter than usual). Snowfall totaled 13 inches, below the 51-inch average. The wettest month was June.