Cottage Grove, MN Weather & Growing Conditions
Today
76°F
Patchy Smoke
Patchy smoke between 11am and 2pm. Partly sunny, with a high near 76. West northwest wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Patchy Smoke | 5 to 10 mph WNW | 6% |
| Tonight | 57°F | Partly Cloudy | 0 to 10 mph WNW | 4% |
| Wednesday | 79°F | Sunny | 0 to 10 mph W | 0% |
| Wednesday Night | 59°F | Mostly Clear | 5 to 10 mph SW | 0% |
| Thursday | 82°F | Sunny | 5 to 10 mph SSW | 0% |
| Thursday Night | 64°F | Mostly Clear | 5 to 10 mph SSW | 4% |
| Friday | 85°F | Sunny | 5 to 15 mph SSW | 10% |
| Friday Night | 65°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 26% |
| Saturday | 84°F | Sunny | 5 to 10 mph SSW | 14% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph N | 48% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 48% |
| Sunday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph NNE | 19% |
| Monday | 82°F | Slight Chance Showers And Thunderstorms | 5 mph ENE | 22% |
| Monday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph NE | 23% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Cottage Grove, MN
Last spring frost
Apr 23
First fall frost
Oct 19
Growing season
177 days
Hardiness zone
5a
Explore more for Cottage Grove, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Hastings Dam 2, Mn (5.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.