National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Thu, Sep-10-2026 5:41am CDT
Cottage Grove
 
Today

Today: Sunny
Sunny
Friday

Friday: Sunny
Sunny
Saturday

Saturday: Slight Chance Rain Showers
Slight Chance Rain Showers
Sunday

Sunday: Mostly Sunny then Slight Chance Rain Showers
Mostly Sunny then Slight Chance Rain Showers
Monday

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

Tuesday: Rain Showers Likely
Rain Showers Likely
Wednesday

Wednesday: Slight Chance Rain Showers
Slight Chance Rain Showers
 
Hi 78 °F Hi 79 °F Hi 80 °F Hi 74 °F Hi 81 °F Hi 70 °F Hi 70 °F  
 
Tonight

Tonight: Clear
Clear
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
Sunday
Night
Sunday Night: Chance Showers And Thunderstorms
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
Wednesday
Night
Wednesday Night: Chance Rain Showers
Chance Rain Showers
 
Lo 54 °F Lo 60 °F Lo 55 °F Lo 59 °F Lo 57 °F Lo 52 °F Lo 56 °F  

 

Today
 
Sunny, with a high near 78. Northwest wind 0 to 5 mph.
Tonight
 
Clear, with a low around 54. Southeast 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.
Saturday
 
A slight chance of rain showers between 7am and 1pm. Partly sunny, with a high near 80. Southwest wind around 10 mph. Chance of precipitation is 20%.
Saturday Night
 
Partly cloudy, with a low around 55. Northwest wind around 5 mph.
Sunday
 
A slight chance of rain showers after 1pm. Mostly sunny, with a high near 74. North wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Sunday Night
 
A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 59. East wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Monday
 
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.
Monday Night
 
Showers and thunderstorms likely. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.
Tuesday
 
Rain showers likely. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.
Tuesday Night
 
A slight chance of rain showers. Mostly cloudy, with a low around 52. Chance of precipitation is 20%.
Wednesday
 
A slight chance of rain showers. Partly sunny, with a high near 70. Chance of precipitation is 20%.
Wednesday Night
 
A chance of rain showers. Mostly cloudy, with a low around 56. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.