Cottage Grove, WI Weather

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Cottage Grove, WI

Updated: Aug-06-2026 5:03pm

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

Updated: Thu, Aug-06-2026 2:46pm CDT

Cottage Grove

This Afternoon Mostly Sunny	Friday Patchy Fog then Partly Sunny	Saturday Sunny	Sunday Chance Showers And T-Storms	Monday Chance Showers And T-Storms then Showers And T-Storms Likely	Tuesday Chance Rain Showers	Wednesday Chance Showers And T-Storms then Slight Chance Showers And T-Storms
Hi 81 °F	Hi 84 °F	Hi 81 °F	Hi 83 °F	Hi 83 °F	Hi 80 °F	Hi 80 °F

Tonight Mostly Cloudy then Patchy Fog	Friday Night Slight Chance Showers And T-Storms then Mostly Cloudy	Saturday Night Partly Cloudy then Chance Showers And T-Storms	Sunday Night Partly Cloudy then Chance Showers And T-Storms	Monday Night Chance Showers And T-Storms	Tuesday Night Chance Showers And T-Storms	Wednesday Night Slight Chance Showers And T-Storms then Partly Cloudy
Lo 64 °F	Lo 64 °F	Lo 63 °F	Lo 66 °F	Lo 64 °F	Lo 62 °F	Lo 60 °F

This Afternoon	Mostly sunny, with a high near 81. South wind around 5 mph.
Tonight	Patchy fog after 4am. Mostly cloudy, with a low around 64. South wind 0 to 5 mph.
Friday	Patchy fog before 8am. Partly sunny, with a high near 84. Southwest wind 0 to 10 mph.
Friday Night	A slight chance of showers and thunderstorms between 8pm and midnight. Mostly cloudy, with a low around 64. West wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday	Sunny, with a high near 81. Northwest wind around 5 mph.
Saturday Night	A chance of rain showers between 1am and 4am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 63. Southwest wind 0 to 5 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 7am, then a chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 83. South wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Sunday Night	A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66. South wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a half and three quarters of an inch possible.
Monday	A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely between 7am and 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 70%.
Monday Night	A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 40%.
Tuesday	A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 40%.
Tuesday Night	A chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 40%.
Wednesday	A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 80. Chance of precipitation is 30%.
Wednesday Night	A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 60. Chance of precipitation is 20%.

Forecast from NOAA-NWS for Cottage Grove, WI.