National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Thu, Aug-20-2026 2:41pm CDT
Cottage Grove
 
This
Afternoon
This Afternoon: Partly Sunny
Partly Sunny
Friday

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

Saturday: Sunny
Sunny
Sunday

Sunday: Sunny
Sunny
Monday

Monday: Mostly Sunny
Mostly Sunny
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Wednesday

Wednesday: Chance Rain Showers
Chance Rain Showers
 
Hi 80 °F Hi 81 °F Hi 79 °F Hi 76 °F Hi 77 °F Hi 80 °F Hi 81 °F  
 
Tonight

Tonight: Mostly Cloudy
Mostly Cloudy
Friday
Night
Friday Night: Showers And Thunderstorms Likely then Partly Cloudy
Showers And T-Storms Likely then Partly Cloudy
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
Tuesday
Night
Tuesday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Slight Chance Rain Showers then Partly Cloudy
Slight Chance Rain Showers then Partly Cloudy
 
Lo 61 °F Lo 61 °F Lo 55 °F Lo 53 °F Lo 57 °F Lo 63 °F Lo 60 °F  

 

This Afternoon
 
Partly sunny, with a high near 80. South wind around 5 mph.
Tonight
 
Mostly cloudy, with a low around 61. South wind 0 to 5 mph. New rainfall amounts less than a tenth of an inch possible.
Friday
 
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 81. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Friday Night
 
Showers and thunderstorms likely before 9pm, then a slight chance of showers and thunderstorms between 9pm and 10pm. Partly cloudy, with a low around 61. West wind 0 to 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Saturday
 
Sunny, with a high near 79. Northwest wind 5 to 10 mph.
Saturday Night
 
Mostly clear, with a low around 55. North wind 5 to 10 mph.
Sunday
 
Sunny, with a high near 76. Northwest wind around 5 mph.
Sunday Night
 
Mostly clear, with a low around 53. Northwest wind 0 to 5 mph.
Monday
 
Mostly sunny, with a high near 77.
Monday Night
 
Partly cloudy, with a low around 57.
Tuesday
 
Mostly sunny, with a high near 80.
Tuesday Night
 
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 63. Chance of precipitation is 40%.
Wednesday
 
A chance of rain showers. Mostly sunny, with a high near 81. Chance of precipitation is 40%.
Wednesday Night
 
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 60. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.