Cottage Grove, WI Weather & Growing Conditions
Today
83°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 83. Southwest wind around 10 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 |
|---|---|---|---|---|
| Today | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 10 mph SW | 30% |
| Tonight | 62°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph W | 89% |
| Wednesday | 75°F | Patchy Fog | 5 mph NW | 53% |
| Wednesday Night | 58°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 28% |
| Thursday | 79°F | Slight Chance Rain Showers then Mostly Sunny | 0 to 5 mph N | 16% |
| Thursday Night | 59°F | Mostly Clear | 0 mph | 5% |
| Friday | 82°F | Sunny | 0 to 5 mph SW | 2% |
| Friday Night | 63°F | Mostly Clear | 5 mph SW | 4% |
| Saturday | 84°F | Sunny | 5 to 10 mph SW | 12% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 30% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 10 mph SW | 30% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SW | 49% |
| Monday | 83°F | Chance Rain Showers | 5 mph S | 49% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 5 mph NW | 42% |
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 Aug 4, 2026.