National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Tue, Aug-25-2026 4:33am CDT
Cottage Grove
 
Today

Today: Patchy Fog then Mostly Sunny
Patchy Fog then Mostly Sunny
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Sunny
Sunny
Saturday

Saturday: Slight Chance Rain Showers
Slight 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
 
Hi 80 °F Hi 82 °F Hi 80 °F Hi 79 °F Hi 79 °F Hi 83 °F Hi 84 °F  
 
Tonight

Tonight: Partly Cloudy then Chance Showers And Thunderstorms
Partly Cloudy then Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Saturday
Night
Saturday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Sunday
Night
Sunday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Monday
Night
Monday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
 
Lo 63 °F Lo 61 °F Lo 57 °F Lo 59 °F Lo 64 °F Lo 67 °F Lo 65 °F  

 

Today
 
Patchy fog before 8am. Mostly sunny, with a high near 80. South wind 0 to 10 mph.
Tonight
 
A chance of showers and thunderstorms between 1am and 5am. Partly cloudy, with a low around 63. South wind 5 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 82. West wind around 10 mph. New rainfall amounts between a tenth and quarter of an inch possible.
Wednesday Night
 
Mostly clear, with a low around 61. Northwest wind 5 to 10 mph.
Thursday
 
Sunny, with a high near 80. Northwest wind around 5 mph.
Thursday Night
 
Mostly clear, with a low around 57. North wind 0 to 5 mph.
Friday
 
Sunny, with a high near 79. East wind 0 to 5 mph.
Friday Night
 
Partly cloudy, with a low around 59. South wind around 5 mph.
Saturday
 
A slight chance of rain showers after 7am. Partly sunny, with a high near 79. Chance of precipitation is 20%.
Saturday Night
 
A slight chance of rain showers before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 40%.
Sunday
 
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 83. Chance of precipitation is 40%.
Sunday Night
 
A chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 50%.
Monday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 50%.
Monday Night
 
A slight chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.