Cottage Grove, WI Weather

National Weather Service Forecast for: Cottage Grove, WI Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI

Updated: Sat, Apr-18-2026 8:36am CDT

Cottage Grove

Today Partly Sunny Sunday Mostly Sunny then Slight Chance Rain Showers Monday Sunny Tuesday Mostly Sunny Wednesday Sunny Thursday Mostly Sunny then Slight Chance Rain Showers Friday Rain Showers Likely   Hi 48 °F Hi 48 °F Hi 55 °F Hi 72 °F Hi 72 °F Hi 78 °F Hi 69 °F     Tonight Mostly Clear Sunday Night Slight Chance Rain Showers then Mostly Clear Monday Night Mostly Cloudy Tuesday Night Mostly Clear Wednesday Night Mostly Clear Thursday Night Showers And T-Storms Likely Friday Night Showers And T-Storms Likely   Lo 31 °F Lo 28 °F Lo 43 °F Lo 43 °F Lo 52 °F Lo 58 °F Lo 42 °F

 

Today	Partly sunny, with a high near 48. West wind around 15 mph, with gusts as high as 35 mph.
Tonight	Mostly clear, with a low around 31. West wind 5 to 15 mph, with gusts as high as 30 mph.
Sunday	A slight chance of rain showers after 1pm. Mostly sunny, with a high near 48. Northwest wind 5 to 15 mph. Chance of precipitation is 20%.
Sunday Night	A slight chance of rain showers before 7pm. Mostly clear, with a low around 28. North wind 0 to 10 mph. Chance of precipitation is 20%.
Monday	Sunny, with a high near 55. South wind 0 to 10 mph.
Monday Night	Mostly cloudy, with a low around 43. South wind around 10 mph.
Tuesday	Mostly sunny, with a high near 72. Southwest wind around 10 mph.
Tuesday Night	Mostly clear, with a low around 43. North wind around 5 mph.
Wednesday	Sunny, with a high near 72.
Wednesday Night	Mostly clear, with a low around 52.
Thursday	A slight chance of rain showers after 1pm. Mostly sunny, with a high near 78. Chance of precipitation is 20%.
Thursday Night	A slight chance of rain showers before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 58. Chance of precipitation is 70%.
Friday	Rain showers likely before 1pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.
Friday Night	Showers and thunderstorms likely. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.