Cottage Grove, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cottage Grove, a city in Washington County, Minnesota.
Overnight
52°F
Light Rain
Rain and patchy fog. Cloudy, with a low around 52. Northwest wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Cottage Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Light Rain | 5 mph NW | 88% |
| Wednesday | 56°F | Light Rain | 5 to 10 mph W | 95% |
| Wednesday Night | 45°F | Light Rain then Drizzle Likely | 10 to 15 mph NW | 97% |
| Thursday | 49°F | Slight Chance Drizzle then Mostly Cloudy | 10 to 15 mph NNW | 15% |
| Thursday Night | 34°F | Mostly Cloudy | 5 to 10 mph N | 0% |
| Friday | 46°F | Sunny | 0 to 5 mph NNE | 0% |
| Friday Night | 29°F | Mostly Clear | 0 mph | 0% |
| Saturday | 50°F | Sunny | 0 to 5 mph SSW | 2% |
| Saturday Night | 36°F | Mostly Clear | 5 mph WSW | 3% |
| Sunday | 54°F | Sunny | 5 mph W | 4% |
| Sunday Night | 37°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Monday | 59°F | Mostly Sunny | 5 to 10 mph WSW | 1% |
| Monday Night | 40°F | Mostly Clear | 0 to 5 mph WNW | 0% |
| Tuesday | 56°F | Sunny | 0 to 5 mph WNW | 1% |
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 Nov 4, 2026.