Cottage Grove, WI Weather

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Cottage Grove, WI

Updated: Aug-28-2026 8:56pm

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

Updated: Fri, Aug-28-2026 8:31pm CDT

Cottage Grove

	Saturday Chance Rain Showers	Sunday Chance Showers And T-Storms	Monday Chance Showers And T-Storms	Tuesday Chance Showers And T-Storms	Wednesday Chance Showers And T-Storms	Thursday Chance Rain Showers then Slight Chance Showers And T-Storms	Friday Chance Rain Showers
	Hi 77 °F	Hi 85 °F	Hi 88 °F	Hi 87 °F	Hi 88 °F	Hi 86 °F	Hi 86 °F

Tonight Mostly Cloudy	Saturday Night Chance Showers And T-Storms	Sunday Night Mostly Cloudy then Chance Showers And T-Storms	Monday Night Mostly Cloudy then Slight Chance Showers And T-Storms	Tuesday Night Chance Showers And T-Storms	Wednesday Night Chance Showers And T-Storms	Thursday Night Chance Showers And T-Storms
Lo 61 °F	Lo 67 °F	Lo 70 °F	Lo 72 °F	Lo 70 °F	Lo 68 °F	Lo 67 °F

Tonight	Mostly cloudy, with a low around 61. South wind 0 to 5 mph.
Saturday	A chance of rain showers after 10am. Mostly cloudy, with a high near 77. South wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Saturday Night	A chance of rain showers before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 67. South wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Sunday	A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. Southwest wind 10 to 15 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Sunday Night	A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. South wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Monday	A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 88. South wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Monday Night	A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72. Southwest wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Tuesday	A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 87. Southwest wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Tuesday Night	A chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.
Wednesday	A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 40%.
Wednesday Night	A chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 30%.
Thursday	A chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Thursday Night	A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 40%.
Friday	A chance of rain showers before 1pm. Mostly sunny, with a high near 86. Chance of precipitation is 40%.

Forecast from NOAA-NWS for Cottage Grove, WI.