Cottage Grove, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cottage Grove, a village in Dane County, Wisconsin.
This Afternoon
67°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 2pm, then showers and thunderstorms likely between 2pm and 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers and thunderstorms likely. Cloudy, with a high near 67. East wind 0 to 5 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Cottage Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 68% |
| Tonight | 59°F | Showers And Thunderstorms | 5 to 10 mph NE | 81% |
| Sunday | 65°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 22% |
| Sunday Night | 53°F | Mostly Cloudy | 10 to 15 mph NE | 13% |
| Monday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 34% |
| Monday Night | 48°F | Chance Rain Showers | 5 to 10 mph NE | 34% |
| Tuesday | 61°F | Chance Rain Showers | 10 to 15 mph NE | 32% |
| Tuesday Night | 45°F | Partly Cloudy | 5 to 10 mph NE | 5% |
| Wednesday | 65°F | Mostly Sunny | 5 to 10 mph NE | 2% |
| Wednesday Night | 48°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 67°F | Mostly Sunny | 5 mph NE | 4% |
| Thursday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph NE | 4% |
| Friday Night | 49°F | Partly Cloudy | 0 to 5 mph E | 2% |
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 Sep 19, 2026.