Cottage Grove, MN Weather & Growing Conditions
This Afternoon
60°F
Light Rain
Rain. Cloudy. High near 60, with temperatures falling to around 57 in the afternoon. North wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 60°F | Light Rain | 5 to 10 mph N | 75% |
| Tonight | 51°F | Rain | 5 mph NNE | 98% |
| Wednesday | 57°F | Light Rain | 5 to 10 mph NNE | 89% |
| Wednesday Night | 45°F | Light Rain | 10 mph NNW | 82% |
| Thursday | 50°F | Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 52% |
| Thursday Night | 36°F | Mostly Cloudy | 5 to 10 mph NNE | 3% |
| Friday | 47°F | Mostly Sunny | 0 to 5 mph NNE | 0% |
| Friday Night | 31°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph SW | 1% |
| Saturday Night | 37°F | Partly Cloudy | 5 mph WSW | 9% |
| Sunday | 56°F | Mostly Sunny | 5 to 10 mph W | 10% |
| Sunday Night | 38°F | Partly Cloudy | 5 mph SW | 1% |
| Monday | 58°F | Mostly Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph WNW | 0% |
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 Nov 4, 2026.