National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Wed, Sep-09-2026 8:41pm CDT
Cottage Grove
 
  Thursday

Thursday: Mostly Sunny
Mostly Sunny
Friday

Friday: Sunny
Sunny
Saturday

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

Sunday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
Monday

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

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

Wednesday: Chance Rain Showers
Chance Rain Showers
  Hi 78 °F Hi 79 °F Hi 80 °F Hi 76 °F Hi 82 °F Hi 74 °F Hi 72 °F
 
Tonight

Tonight: Partly Cloudy
Partly Cloudy
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
Sunday
Night
Sunday Night: Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms then Chance Showers And T-Storms
Monday
Night
Monday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Tuesday
Night
Tuesday Night: Slight Chance Rain Showers
Slight Chance Rain Showers
 
Lo 58 °F Lo 55 °F Lo 60 °F Lo 55 °F Lo 59 °F Lo 60 °F Lo 55 °F  

 

Tonight
 
Partly cloudy, with a low around 58. Northwest wind around 5 mph.
Thursday
 
Mostly sunny, with a high near 78. Northwest wind 0 to 5 mph.
Thursday Night
 
Mostly clear, with a low around 55. East wind 0 to 5 mph.
Friday
 
Sunny, with a high near 79. South wind 5 to 10 mph.
Friday Night
 
Partly cloudy, with a low around 60. South wind 5 to 10 mph. New rainfall amounts less than a tenth of an inch possible.
Saturday
 
A slight chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 80. Southwest wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Saturday Night
 
Partly cloudy, with a low around 55. Northwest wind 0 to 5 mph.
Sunday
 
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 76. Northeast wind 0 to 5 mph. Chance of precipitation is 20%.
Sunday Night
 
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Chance of precipitation is 50%.
Monday
 
Showers and thunderstorms likely. Partly sunny, with a high near 82. Chance of precipitation is 70%.
Monday Night
 
Showers and thunderstorms likely. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Tuesday
 
Showers and thunderstorms likely. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.
Tuesday Night
 
A slight chance of rain showers. Mostly cloudy, with a low around 55. Chance of precipitation is 20%.
Wednesday
 
A chance of rain showers. Partly sunny, with a high near 72. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.