Cottage Grove, WI Weather

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Cottage Grove, WI

Updated: Jun-29-2026 4:35pm

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

Updated: Mon, Jun-29-2026 2:36pm CDT

Cottage Grove

This Afternoon Sunny	Tuesday Mostly Sunny	Wednesday Chance Rain Showers then Sunny	Thursday Chance Showers And T-Storms	Friday Showers And T-Storms Likely	Independence Day Chance Showers And T-Storms	Sunday Rain Showers Likely then Chance Showers And T-Storms
Hi 94 °F	Hi 93 °F	Hi 92 °F	Hi 90 °F	Hi 87 °F	Hi 86 °F	Hi 84 °F

Tonight Partly Cloudy then Slight Chance Rain Showers	Tuesday Night Chance Showers And T-Storms	Wednesday Night Partly Cloudy then Chance Showers And T-Storms	Thursday Night Chance Showers And T-Storms then Showers And T-Storms Likely	Friday Night Chance Showers And T-Storms	Saturday Night Showers And T-Storms Likely	Sunday Night Chance Showers And T-Storms
Lo 76 °F	Lo 75 °F	Lo 75 °F	Lo 71 °F	Lo 70 °F	Lo 68 °F	Lo 65 °F

Extreme Heat Warning issued June 29 at 1:04PM CDT until July 1 at 7:00PM CDT

This Afternoon	Sunny, with a high near 94. Heat index values as high as 105. South wind around 15 mph, with gusts as high as 30 mph.
Tonight	A slight chance of rain showers between 3am and 4am. Partly cloudy, with a low around 76. Heat index values as high as 105. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Tuesday	Mostly sunny, with a high near 93. Heat index values as high as 105. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night	A chance of showers and thunderstorms between 10pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 75. Heat index values as high as 103. Southwest wind 10 to 15 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Wednesday	A chance of rain showers before 7am. Sunny, with a high near 92. Southwest wind 10 to 15 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Wednesday Night	A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. Southwest wind 10 to 15 mph. Chance of precipitation is 30%.
Thursday	A chance of showers and thunderstorms. Mostly sunny, with a high near 90. Southwest wind 10 to 15 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Thursday Night	A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Partly cloudy, with a low around 71. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Friday	Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 70%.
Friday Night	A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 50%.
Independence Day	A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 50%.
Saturday Night	A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Sunday	Rain showers likely before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Sunday Night	A chance of showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 50%.

Forecast from NOAA-NWS for Cottage Grove, WI.