Cottage Grove, WI Weather

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Cottage Grove, WI

Updated: Aug-27-2026 5:30pm

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

Updated: Thu, Aug-27-2026 2:52pm CDT

Cottage Grove

This Afternoon Mostly Sunny	Friday Patchy Fog then Sunny	Saturday Partly Sunny then Slight Chance Rain Showers	Sunday Showers And T-Storms Likely then Slight Chance Showers And T-Storms	Monday Chance Showers And T-Storms then Slight Chance Showers And T-Storms	Tuesday Chance Showers And T-Storms	Wednesday Chance Showers And T-Storms then Slight Chance Showers And T-Storms
Hi 81 °F	Hi 82 °F	Hi 79 °F	Hi 86 °F	Hi 87 °F	Hi 86 °F	Hi 86 °F

Tonight Mostly Clear then Patchy Fog	Friday Night Partly Cloudy	Saturday Night Showers And T-Storms Likely	Sunday Night Slight Chance Showers And T-Storms	Monday Night Chance Showers And T-Storms	Tuesday Night Slight Chance Showers And T-Storms	Wednesday Night Slight Chance Showers And T-Storms
Lo 57 °F	Lo 62 °F	Lo 66 °F	Lo 71 °F	Lo 71 °F	Lo 68 °F	Lo 67 °F

This Afternoon	Mostly sunny, with a high near 81. Northwest wind around 5 mph.
Tonight	Patchy fog after 4am. Mostly clear, with a low around 57. North wind 0 to 5 mph.
Friday	Patchy fog before 8am. Sunny, with a high near 82. West wind 0 to 5 mph.
Friday Night	Partly cloudy, with a low around 62. Southwest wind 0 to 5 mph.
Saturday	A slight chance of rain showers after 1pm. Partly sunny, with a high near 79. South wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday Night	A slight chance of rain showers before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 66. South wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Sunday	Showers and thunderstorms likely before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 86. South wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Sunday Night	A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 71. South wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Monday	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 87. Chance of precipitation is 30%.
Monday Night	A chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.
Tuesday	A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Tuesday Night	A slight chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 40%.
Wednesday	A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 86. Chance of precipitation is 40%.
Wednesday Night	A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 30%.

Forecast from NOAA-NWS for Cottage Grove, WI.