National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Tue, Jun-30-2026 7:26pm CDT
Cottage Grove
 
  Wednesday

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

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

Friday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Independence
Day
Independence Day: Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Showers And T-Storms Likely then Chance Showers And T-Storms
Sunday

Sunday: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Monday

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

Tuesday: Mostly Sunny then Slight Chance Rain Showers
Mostly Sunny then Slight Chance Rain Showers
  Hi 92 °F Hi 90 °F Hi 89 °F Hi 83 °F Hi 82 °F Hi 84 °F Hi 85 °F
 
Tonight

Tonight: Mostly Cloudy
Mostly Cloudy
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: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Saturday
Night
Saturday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Sunday
Night
Sunday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
 
Lo 77 °F Lo 74 °F Lo 71 °F Lo 69 °F Lo 66 °F Lo 65 °F Lo 64 °F  

Extreme Heat Warning issued June 30 at 7:20PM CDT until July 1 at 7:00PM CDT
Extreme Heat Warning issued June 30 at 1:40PM CDT until July 1 at 7:00PM CDT
 

Tonight
 
Mostly cloudy, with a low around 77. Heat index values as high as 100. Southwest wind around 10 mph.
Wednesday
 
A slight chance of rain showers between 7am and 8am. Mostly sunny, with a high near 92. Heat index values as high as 100. Southwest wind 10 to 15 mph. Chance of precipitation is 20%.
Wednesday Night
 
A chance of showers and thunderstorms between 11pm and 4am. Partly cloudy, with a low around 74. Heat index values as high as 98. Southwest wind 10 to 15 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Thursday
 
A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 90. Southwest wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Thursday Night
 
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then scattered showers and thunderstorms. Mostly cloudy, with a low around 71. Southwest wind 0 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Friday
 
Scattered rain showers before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 89. 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
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Northwest wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Independence Day
 
Showers and thunderstorms likely before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 83. Northeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
 
Showers and thunderstorms likely. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Sunday
 
Showers and thunderstorms likely. Partly sunny, with a high near 82. Chance of precipitation is 60%.
Sunday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Monday
 
A slight chance of rain showers before 7am. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
Monday Night
 
Partly cloudy, with a low around 64.
Tuesday
 
A slight chance of rain showers after 1pm. Mostly sunny, with a high near 85. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.