National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Sun, Aug-30-2026 9:46pm CDT
Cottage Grove
 
  Monday

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

Tuesday: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Wednesday

Wednesday: Slight Chance Rain Showers then Mostly Sunny
Slight Chance Rain Showers then Mostly Sunny
Thursday

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

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

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

Sunday: Mostly Sunny
Mostly Sunny
  Hi 87 °F Hi 89 °F Hi 89 °F Hi 84 °F Hi 84 °F Hi 84 °F Hi 82 °F
 
Tonight

Tonight: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Monday
Night
Monday Night: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy
Tuesday
Night
Tuesday Night: Mostly Cloudy then Slight Chance Showers And Thunderstorms
Mostly Cloudy then Slight Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Thursday
Night
Thursday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Friday
Night
Friday Night: Partly Cloudy then Slight Chance Showers And Thunderstorms
Partly Cloudy then Slight Chance Showers And T-Storms
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
 
Lo 69 °F Lo 71 °F Lo 70 °F Lo 68 °F Lo 66 °F Lo 64 °F Lo 62 °F  

 

Tonight
 
A chance of showers and thunderstorms before 3am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
Monday
 
A chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 87. Southwest wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Monday Night
 
A chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 71. Southwest wind 0 to 10 mph. Chance of precipitation is 30%.
Tuesday
 
A slight chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 89. Heat index values as high as 96. Southwest wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Tuesday Night
 
A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. Southwest wind 0 to 5 mph. Chance of precipitation is 20%.
Wednesday
 
A slight chance of rain showers before 7am. Mostly sunny, with a high near 89. South wind 0 to 5 mph. Chance of precipitation is 20%.
Wednesday Night
 
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 68. Southeast wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Thursday
 
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84. Southeast wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Thursday Night
 
A chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
Friday
 
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 84. Chance of precipitation is 50%.
Friday Night
 
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Chance of precipitation is 20%.
Saturday
 
A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
Saturday Night
 
Partly cloudy, with a low around 62.
Sunday
 
Mostly sunny, with a high near 82.

 

Forecast from NOAA-NWS for Cottage Grove, WI.