National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Tue, Sep-15-2026 10:33am CDT
Cottage Grove
 
Today

Today: Chance Rain Showers
Chance Rain Showers
Wednesday

Wednesday: Partly Sunny
Partly Sunny
Thursday

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

Friday: Chance Rain Showers
Chance Rain Showers
Saturday

Saturday: Showers And Thunderstorms
Showers And T-Storms
Sunday

Sunday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Monday

Monday: Mostly Sunny
Mostly Sunny
 
Hi 74 °F Hi 71 °F Hi 76 °F Hi 73 °F Hi 77 °F Hi 70 °F Hi 69 °F  
 
Tonight

Tonight: Mostly Cloudy
Mostly Cloudy
Wednesday
Night
Wednesday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Thursday
Night
Thursday Night: Mostly Cloudy
Mostly Cloudy
Friday
Night
Friday Night: Showers And Thunderstorms
Showers And T-Storms
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Sunday
Night
Sunday Night: Slight Chance Showers And Thunderstorms then Mostly Cloudy
Slight Chance Showers And T-Storms then Mostly Cloudy
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
 
Lo 53 °F Lo 58 °F Lo 56 °F Lo 59 °F Lo 57 °F Lo 51 °F Lo 49 °F  

 

Today
 
A chance of rain showers before 1pm. Cloudy, with a high near 74. West wind 10 to 15 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
Tonight
 
Mostly cloudy, with a low around 53. North wind around 5 mph.
Wednesday
 
Partly sunny, with a high near 71. East wind 5 to 10 mph. New rainfall amounts less than a tenth of an inch possible.
Wednesday 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 58. East wind 0 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Thursday
 
A chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 76. Northeast wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Thursday Night
 
Mostly cloudy, with a low around 56. Northeast wind 0 to 5 mph.
Friday
 
A chance of rain showers after 7am. Mostly cloudy, with a high near 73. East wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
 
A chance of rain showers before 7pm, then showers and thunderstorms. Mostly cloudy, with a low around 59. Southeast wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Saturday
 
Showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 77. Chance of precipitation is 80%.
Saturday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Chance of precipitation is 50%.
Sunday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 70. Chance of precipitation is 30%.
Sunday Night
 
A slight chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 51. Chance of precipitation is 20%.
Monday
 
Mostly sunny, with a high near 69.
Monday Night
 
Partly cloudy, with a low around 49.

 

Forecast from NOAA-NWS for Cottage Grove, WI.