Cottage Grove, WI Weather

77°F

Cottage Grove, WI

Updated: Aug-20-2026 11:44am

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

Updated: Thu, Aug-20-2026 9:16am CDT

Cottage Grove

Today Sunny	Friday Chance Rain Showers then Chance Showers And T-Storms	Saturday Sunny	Sunday Sunny	Monday Mostly Sunny	Tuesday Mostly Sunny then Slight Chance Rain Showers	Wednesday Chance Showers And T-Storms
Hi 80 °F	Hi 79 °F	Hi 79 °F	Hi 77 °F	Hi 77 °F	Hi 80 °F	Hi 81 °F

Tonight Partly Cloudy then Slight Chance Rain Showers	Friday Night Chance Showers And T-Storms	Saturday Night Mostly Clear	Sunday Night Partly Cloudy	Monday Night Partly Cloudy	Tuesday Night Chance Showers And T-Storms	Wednesday Night Slight Chance Showers And T-Storms then Partly Cloudy
Lo 61 °F	Lo 60 °F	Lo 55 °F	Lo 55 °F	Lo 58 °F	Lo 62 °F	Lo 61 °F

Today	Sunny, with a high near 80. Southwest wind 0 to 5 mph.
Tonight	A slight chance of rain showers after 5am. Partly cloudy, with a low around 61. South wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Friday	A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 79. Southwest wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
Friday Night	A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 60. West wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Saturday	Sunny, with a high near 79. Northwest wind 5 to 10 mph.
Saturday Night	Mostly clear, with a low around 55. North wind 5 to 10 mph.
Sunday	Sunny, with a high near 77. Northwest wind around 5 mph.
Sunday Night	Partly cloudy, with a low around 55. West wind 0 to 5 mph.
Monday	Mostly sunny, with a high near 77.
Monday Night	Partly cloudy, with a low around 58.
Tuesday	A slight chance of rain showers after 1pm. Mostly sunny, with a high near 80. Chance of precipitation is 20%.
Tuesday Night	A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
Wednesday	A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 81. Chance of precipitation is 30%.
Wednesday Night	A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 61. Chance of precipitation is 20%.

Forecast from NOAA-NWS for Cottage Grove, WI.