Cottage Grove, WI Weather

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Cottage Grove, WI

Updated: Aug-24-2026 1:12pm

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

Updated: Mon, Aug-24-2026 11:22am CDT

Cottage Grove

This Afternoon Mostly Sunny	Tuesday Mostly Sunny	Wednesday Slight Chance Rain Showers then Slight Chance Showers And T-Storms	Thursday Sunny	Friday Sunny	Saturday Chance Rain Showers	Sunday Chance Showers And T-Storms
Hi 78 °F	Hi 81 °F	Hi 81 °F	Hi 81 °F	Hi 80 °F	Hi 81 °F	Hi 82 °F

Tonight Mostly Clear	Tuesday Night Mostly Cloudy then Chance Showers And T-Storms	Wednesday Night Slight Chance Showers And T-Storms then Mostly Clear	Thursday Night Mostly Clear	Friday Night Partly Cloudy then Slight Chance Rain Showers	Saturday Night Chance Showers And T-Storms	Sunday Night Slight Chance Showers And T-Storms then Chance Showers And T-Storms
Lo 56 °F	Lo 65 °F	Lo 61 °F	Lo 57 °F	Lo 59 °F	Lo 64 °F	Lo 65 °F

This Afternoon	Mostly sunny, with a high near 78. North wind 0 to 5 mph.
Tonight	Mostly clear, with a low around 56. Southeast wind around 0 mph.
Tuesday	Mostly sunny, with a high near 81. South wind 0 to 10 mph.
Tuesday Night	A chance of showers and thunderstorms between 1am and 5am. Mostly cloudy, with a low around 65. South wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Wednesday	A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 81. West wind around 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Wednesday Night	A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 61. Northwest wind 5 to 10 mph. Chance of precipitation is 20%.
Thursday	Sunny, with a high near 81. Northwest wind around 5 mph.
Thursday Night	Mostly clear, with a low around 57. Northwest wind 0 to 5 mph.
Friday	Sunny, with a high near 80.
Friday Night	A slight chance of rain showers after 1am. Partly cloudy, with a low around 59. Chance of precipitation is 20%.
Saturday	A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 30%.
Saturday Night	A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 50%.
Sunday	A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 50%.
Sunday Night	A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.

Forecast from NOAA-NWS for Cottage Grove, WI.