National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Wed, Sep-02-2026 1:34pm CDT
Cottage Grove
 
This
Afternoon
This Afternoon: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Thursday

Thursday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Friday

Friday: Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Showers And T-Storms then Slight Chance Showers And T-Storms
Saturday

Saturday: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Sunday

Sunday: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Labor
Day
Labor Day: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Tuesday

Tuesday: Chance Rain Showers
Chance Rain Showers
 
Hi 89 °F Hi 85 °F Hi 87 °F Hi 85 °F Hi 83 °F Hi 82 °F Hi 81 °F  
 
Tonight

Tonight: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Thursday
Night
Thursday Night: Chance Showers And Thunderstorms then Showers And Thunderstorms
Chance Showers And T-Storms then Showers And T-Storms
Friday
Night
Friday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Saturday
Night
Saturday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Sunday
Night
Sunday Night: Partly Cloudy then Chance Showers And Thunderstorms
Partly Cloudy then Chance Showers And T-Storms
Monday
Night
Monday Night: Mostly Cloudy then Slight Chance Rain Showers
Mostly Cloudy then Slight Chance Rain Showers
Tuesday
Night
Tuesday Night: Chance Rain Showers
Chance Rain Showers
 
Lo 71 °F Lo 68 °F Lo 67 °F Lo 64 °F Lo 64 °F Lo 63 °F Lo 66 °F  

 

This Afternoon
 
A slight chance of showers and thunderstorms. Partly sunny, with a high near 89. Heat index values as high as 96. Southwest wind around 5 mph. Chance of precipitation is 20%.
Tonight
 
Scattered rain showers before 8pm, then a slight chance of showers and thunderstorms between 11pm and 3am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 71. Southeast wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Thursday
 
A chance of showers and thunderstorms before 10am, then a chance of showers and thunderstorms. Partly sunny, with a high near 85. South wind 0 to 10 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Thursday Night
 
A chance of showers and thunderstorms before midnight, then showers and thunderstorms. Mostly cloudy, with a low around 68. Southeast wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Friday
 
Showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 87. Southeast wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
 
A chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 67. Southeast wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Saturday
 
A chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 85. East wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Saturday Night
 
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64. East wind 0 to 5 mph. Chance of precipitation is 20%.
Sunday
 
A slight chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 83. Chance of precipitation is 20%.
Sunday Night
 
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Labor Day
 
A chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
Monday Night
 
A slight chance of rain showers after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 20%.
Tuesday
 
A chance of rain showers before 1pm. Partly sunny, with a high near 81. Chance of precipitation is 30%.
Tuesday Night
 
A chance of rain showers after 7pm. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.