Cottage Grove, WI Weather

72°F

Cottage Grove, WI

Updated: Aug-29-2026 10:02pm

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

Updated: Sat, Aug-29-2026 9:16pm CDT

Cottage Grove

	Sunday Chance Showers And T-Storms	Monday Slight Chance Showers And T-Storms	Tuesday Slight Chance Showers And T-Storms	Wednesday Slight Chance Rain Showers	Thursday Chance Rain Showers	Friday Chance Showers And T-Storms then Slight Chance Showers And T-Storms	Saturday Slight Chance Rain Showers
	Hi 83 °F	Hi 88 °F	Hi 89 °F	Hi 89 °F	Hi 84 °F	Hi 84 °F	Hi 84 °F

Tonight Chance Showers And T-Storms	Sunday Night Chance Showers And T-Storms then Slight Chance Showers And T-Storms	Monday Night Mostly Cloudy then Slight Chance Showers And T-Storms	Tuesday Night Mostly Cloudy then Slight Chance Rain Showers	Wednesday Night Chance Showers And T-Storms	Thursday Night Chance Showers And T-Storms	Friday Night Partly Cloudy
Lo 68 °F	Lo 71 °F	Lo 72 °F	Lo 71 °F	Lo 67 °F	Lo 64 °F	Lo 65 °F

Tonight	A slight chance of rain showers before 10pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 68. South wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Sunday	A chance of showers and thunderstorms before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 83. 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 before 7pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 71. South wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Monday	A slight chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 88. Heat index values as high as 95. Southwest wind around 10 mph. Chance of precipitation is 20%. 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 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Tuesday	A slight chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 89. Southwest wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Tuesday Night	A slight chance of rain showers after 1am. Mostly cloudy, with a low around 71. Southwest wind 0 to 5 mph. Chance of precipitation is 20%.
Wednesday	A slight chance of rain showers. Mostly sunny, with a high near 89. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Wednesday Night	A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Thursday	A chance of rain showers before 1pm. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
Thursday Night	A slight chance of rain showers between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Friday	A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 84. Chance of precipitation is 30%.
Friday Night	Partly cloudy, with a low around 65.
Saturday	A slight chance of rain showers between 7am and 1pm. Mostly sunny, with a high near 84. Chance of precipitation is 20%.

Forecast from NOAA-NWS for Cottage Grove, WI.