Cottage Grove, WI Weather

71°F

Cottage Grove, WI

Updated: Aug-11-2026 3:33am

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

Updated: Tue, Aug-11-2026 1:22am CDT

Cottage Grove

	Tuesday Patchy Fog	Wednesday Chance Showers And T-Storms	Thursday Chance Showers And T-Storms	Friday Mostly Sunny	Saturday Showers And T-Storms Likely	Sunday Slight Chance Showers And T-Storms	Monday Mostly Sunny
	Hi 82 °F	Hi 83 °F	Hi 80 °F	Hi 77 °F	Hi 77 °F	Hi 78 °F	Hi 78 °F

Overnight Slight Chance Showers And T-Storms	Tuesday Night Partly Cloudy then Patchy Fog	Wednesday Night Slight Chance Rain Showers then Partly Cloudy	Thursday Night Slight Chance Showers And T-Storms then Mostly Cloudy	Friday Night Slight Chance Showers And T-Storms	Saturday Night Chance Showers And T-Storms then Showers And T-Storms Likely	Sunday Night Mostly Cloudy
Lo 67 °F	Lo 65 °F	Lo 65 °F	Lo 61 °F	Lo 59 °F	Lo 64 °F	Lo 61 °F

Overnight	A slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 67. East wind around 0 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Tuesday	Patchy fog and showers and thunderstorms likely before 9am, then showers and thunderstorms between 9am and 10am, then showers and thunderstorms likely between 10am and 3pm. Mostly cloudy, with a high near 82. Southeast wind 0 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night	Patchy fog after 3am. Partly cloudy, with a low around 65. Southeast wind 0 to 5 mph. New rainfall amounts less than a tenth of an inch possible.
Wednesday	Areas of fog before 9am, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. South wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Wednesday Night	A slight chance of rain showers before 7pm. Partly cloudy, with a low around 65. Northeast wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Thursday	A chance of rain showers between 7am and 10am, then a chance of showers and thunderstorms between 10am and 1pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Northeast wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Thursday Night	A slight chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 61. Northeast wind around 5 mph. Chance of precipitation is 20%.
Friday	Mostly sunny, with a high near 77. East wind 5 to 10 mph.
Friday Night	A slight chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Saturday	Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.
Saturday Night	A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 64. Chance of precipitation is 70%.
Sunday	Rain showers likely before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Mostly cloudy, with a high near 78. Chance of precipitation is 70%.
Sunday Night	Mostly cloudy, with a low around 61.
Monday	Mostly sunny, with a high near 78.

Forecast from NOAA-NWS for Cottage Grove, WI.