National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Tue, Aug-18-2026 9:01am CDT
Cottage Grove
 
Today

Today: Slight Chance Rain Showers then Chance Showers And Thunderstorms
Slight Chance Rain Showers then Chance Showers And T-Storms
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Thursday

Thursday: Sunny
Sunny
Friday

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

Saturday: Mostly Sunny
Mostly Sunny
Sunday

Sunday: Sunny
Sunny
Monday

Monday: Mostly Sunny
Mostly Sunny
 
Hi 80 °F Hi 78 °F Hi 80 °F Hi 80 °F Hi 78 °F Hi 76 °F Hi 77 °F  
 
Tonight

Tonight: Chance Showers And Thunderstorms then Mostly Cloudy
Chance Showers And T-Storms then Mostly Cloudy
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Partly Cloudy then Chance Showers And Thunderstorms
Partly Cloudy then Chance Showers And T-Storms
Friday
Night
Friday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
Sunday
Night
Sunday Night: Partly Cloudy
Partly Cloudy
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
 
Lo 60 °F Lo 56 °F Lo 60 °F Lo 61 °F Lo 57 °F Lo 57 °F Lo 60 °F  

 

Today
 
A slight chance of rain showers before 10am, then a chance of showers and thunderstorms. Mostly cloudy. High near 80, with temperatures falling to around 75 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Tonight
 
A chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 60. Northwest wind 0 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Wednesday
 
Mostly sunny, with a high near 78. North wind 0 to 5 mph.
Wednesday Night
 
Mostly clear, with a low around 56. North wind 0 to 5 mph.
Thursday
 
Sunny, with a high near 80. West wind 0 to 5 mph.
Thursday Night
 
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 60. Southwest wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Friday
 
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 80. Southwest wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Friday Night
 
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 61. West wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Saturday
 
Mostly sunny, with a high near 78.
Saturday Night
 
Mostly clear, with a low around 57.
Sunday
 
Sunny, with a high near 76.
Sunday Night
 
Partly cloudy, with a low around 57.
Monday
 
Mostly sunny, with a high near 77.
Monday Night
 
Partly cloudy, with a low around 60.

 

Forecast from NOAA-NWS for Cottage Grove, WI.