Cottage Grove, Minnesota, experiences a humid continental climate characterized by warm, wet summers and cold, snowy winters. Throughout the year, temperatures typically range from 10°F to 83°F, with July being the warmest month and January the coldest. Precipitation is fairly evenly distributed, with June receiving the highest average rainfall of 3.74 inches.
In response to environmental challenges, the city has implemented several initiatives to protect its natural resources. The Stormwater Pollution Prevention Program (SWPPP) aims to safeguard local water bodies by managing stormwater runoff effectively. Residents are encouraged to participate in public education efforts and review the SWPPP document available at City Hall.
Additionally, the city is addressing concerns related to per- and polyfluoroalkyl substances (PFAS) contamination. A new water treatment facility, funded by the 3M Settlement Agreement, became operational in June 2025. This plant utilizes granular activated carbon to remove PFAS from the water supply, ensuring safe drinking water for residents.
These efforts reflect Cottage Grove’s commitment to environmental stewardship and the well-being of its community.