Cottage Grove, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cottage Grove, a city in Washington County, Minnesota.
Today
76°F
Chance Showers And Thunderstorms then Partly Sunny
A chance of showers and thunderstorms before 8am. Partly sunny, with a high near 76. Northwest wind around 10 mph. Chance of precipitation is 50%.
7-day forecast for Cottage Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Chance Showers And Thunderstorms then Partly Sunny | 10 mph NW | 47% |
| Tonight | 57°F | Partly Cloudy | 0 to 10 mph NW | 5% |
| Wednesday | 77°F | Sunny | 0 to 5 mph W | 0% |
| Wednesday Night | 58°F | Mostly Clear | 5 mph SW | 0% |
| Thursday | 81°F | Sunny | 5 to 10 mph SSW | 0% |
| Thursday Night | 63°F | Mostly Clear | 5 to 10 mph SSW | 4% |
| Friday | 84°F | Sunny | 5 to 15 mph SSW | 11% |
| Friday Night | 64°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 | 83°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 48% |
| Sunday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 mph NNE | 19% |
| Monday | 82°F | Slight Chance Showers And Thunderstorms | 5 mph ENE | 23% |
| Monday Night | 64°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph NE | 23% |
Forecast source: National Weather Service (api.weather.gov) for Cottage Grove (44.813, -92.914). Updated through the day.
Growing snapshot for Cottage Grove
Last spring frost
Apr 23
First fall frost
Oct 19
Growing season
177 days
Hardiness zone
5a
More local growing data for Cottage Grove: nearby ZIP 55016 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Afton
Bayport
Birchwood Village
Dellwood
Grant
Hugo
Lake Elmo
Lake St. Croix Beach
Lakeland
Lakeland Shores
Mahtomedi
Marine on St. Croix
Newport
Oak Park Heights
Oakdale
Pine Springs
Scandia
St. Marys Point
St. Paul Park
Stillwater
Willernie
Woodbury
Climate data from the nearest NOAA station, Hastings Dam 2, Mn (5.1 mi from Cottage Grove). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.