Cottage Grove, WI Weather & Growing Conditions
Overnight
56°F
Chance Light Rain
A chance of rain. Cloudy, with a low around 56. South wind 10 to 15 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Chance Light Rain | 10 to 15 mph S | 30% |
| Wednesday | 60°F | Slight Chance Light Rain | 15 mph SW | 21% |
| Wednesday Night | 45°F | Chance Light Rain | 15 mph SW | 40% |
| Thursday | 54°F | Light Rain Likely | 10 to 15 mph W | 62% |
| Thursday Night | 37°F | Slight Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 18% |
| Friday | 48°F | Partly Sunny | 5 to 15 mph N | 3% |
| Friday Night | 30°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 50°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 34°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 60°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 60°F | Sunny | 5 to 10 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Cottage Grove, WI
Last spring frost
Apr 30
First fall frost
Oct 11
Growing season
163 days
Hardiness zone
5b
Explore more for Cottage Grove, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Stoughton, Wi (9.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.