Cottage Grove, WI Weather

89°F

Cottage Grove, WI

Updated: Jul-15-2026 11:00am

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

Updated: Wed, Jul-15-2026 9:12am CDT

Cottage Grove

Today Mostly Sunny	Thursday Areas Of Smoke then Slight Chance Showers And T-Storms	Friday Chance Rain Showers	Saturday Sunny then Slight Chance Showers And T-Storms	Sunday Sunny	Monday Chance Showers And T-Storms	Tuesday Sunny
Hi 94 °F	Hi 87 °F	Hi 90 °F	Hi 89 °F	Hi 86 °F	Hi 87 °F	Hi 80 °F

Tonight Mostly Cloudy then Patchy Smoke	Thursday Night Slight Chance Showers And T-Storms	Friday Night Chance Showers And T-Storms then Mostly Clear	Saturday Night Slight Chance Showers And T-Storms then Mostly Clear	Sunday Night Partly Cloudy then Chance Showers And T-Storms	Monday Night Slight Chance Showers And T-Storms then Chance Showers And T-Storms	Tuesday Night Partly Cloudy
Lo 70 °F	Lo 68 °F	Lo 70 °F	Lo 65 °F	Lo 67 °F	Lo 63 °F	Lo 58 °F

Heat Advisory issued July 15 at 5:10AM CDT until July 15 at 8:00PM CDT
Air Quality Alert issued July 14 at 11:40AM CDT

Today	Mostly sunny, with a high near 94. Heat index values as high as 100. North wind around 5 mph.
Tonight	Patchy smoke after 4am. Mostly cloudy, with a low around 70. Heat index values as high as 99. East wind around 5 mph.
Thursday	Areas of smoke before 10am, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 87. Southeast wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Thursday Night	A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 68. Southeast wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Friday	A chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 90. South wind 0 to 5 mph. Chance of precipitation is 40%.
Friday Night	A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 70. Southwest wind around 5 mph. Chance of precipitation is 40%.
Saturday	A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 89. West wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday Night	A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 65. North wind 0 to 10 mph. Chance of precipitation is 20%.
Sunday	Sunny, with a high near 86.
Sunday Night	A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Monday	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 87. Chance of precipitation is 30%.
Monday Night	A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am. Mostly clear, with a low around 63. Chance of precipitation is 30%.
Tuesday	Sunny, with a high near 80.
Tuesday Night	Partly cloudy, with a low around 58.

Forecast from NOAA-NWS for Cottage Grove, WI.