Cottage Grove, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cottage Grove, a village in Dane County, Wisconsin.
Overnight
57°F
Chance Light Rain
A chance of rain. Cloudy, with a low around 57. South wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Cottage Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Chance Light Rain | 10 mph S | 38% |
| Wednesday | 59°F | Slight Chance Light Rain | 15 mph SW | 21% |
| Wednesday Night | 45°F | Chance Light Rain | 15 mph SW | 43% |
| Thursday | 53°F | Light Rain Likely | 10 to 15 mph W | 62% |
| Thursday Night | 36°F | Slight Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 16% |
| Friday | 47°F | Partly Sunny | 5 to 15 mph N | 3% |
| Friday Night | 29°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 | 0 to 5 mph W | 1% |
| Sunday | 55°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 34°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 59°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) for Cottage Grove (43.092, -89.205). Updated through the day.
Growing snapshot for Cottage Grove
Last spring frost
Apr 30
First fall frost
Oct 11
Growing season
163 days
Hardiness zone
5b
More local growing data for Cottage Grove: nearby ZIP 53527 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Belleville
Black Earth
Blue Mounds
Cambridge
Cross Plains
Dane
Deerfield
DeForest
Fitchburg
Lake Ripley
Madison
Maple Bluff
Marshall
Mazomanie
McFarland
Middleton
Monona
Mount Horeb
Oregon
Rockdale
Shorewood Hills
Stoughton
Sun Prairie
Verona
Waunakee
Windsor
Climate data from the nearest NOAA station, Stoughton, Wi (9.8 mi from Cottage Grove). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.