National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Fri, Aug-28-2026 8:31pm CDT
Cottage Grove
 
  Saturday

Saturday: Chance Rain Showers
Chance Rain Showers
Sunday

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

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

Tuesday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Wednesday

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

Thursday: Chance Rain Showers then Slight Chance Showers And Thunderstorms
Chance Rain Showers then Slight Chance Showers And T-Storms
Friday

Friday: Chance Rain Showers
Chance Rain Showers
  Hi 77 °F Hi 85 °F Hi 88 °F Hi 87 °F Hi 88 °F Hi 86 °F Hi 86 °F
 
Tonight

Tonight: Mostly Cloudy
Mostly Cloudy
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Sunday
Night
Sunday Night: Mostly Cloudy then Chance Showers And Thunderstorms
Mostly Cloudy then Chance Showers And T-Storms
Monday
Night
Monday Night: Mostly Cloudy then Slight Chance Showers And Thunderstorms
Mostly Cloudy then Slight Chance Showers And T-Storms
Tuesday
Night
Tuesday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Thursday
Night
Thursday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
 
Lo 61 °F Lo 67 °F Lo 70 °F Lo 72 °F Lo 70 °F Lo 68 °F Lo 67 °F  

 

Tonight
 
Mostly cloudy, with a low around 61. South wind 0 to 5 mph.
Saturday
 
A chance of rain showers after 10am. Mostly cloudy, with a high near 77. South wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Saturday Night
 
A chance of rain showers before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 67. South wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Sunday
 
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. Southwest wind 10 to 15 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Sunday Night
 
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. South wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Monday
 
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 88. South wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Monday Night
 
A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72. Southwest wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Tuesday
 
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 87. Southwest wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Tuesday Night
 
A chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.
Wednesday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 40%.
Wednesday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 30%.
Thursday
 
A chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Thursday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 40%.
Friday
 
A chance of rain showers before 1pm. Mostly sunny, with a high near 86. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.