National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Wed, Sep-02-2026 2:47am CDT
Cottage Grove
 
  Wednesday

Wednesday: Partly Sunny then Slight Chance Showers And Thunderstorms
Partly Sunny then Slight Chance Showers And T-Storms
Thursday

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

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

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

Sunday: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Labor
Day
Labor Day: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Tuesday

Tuesday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
  Hi 90 °F Hi 86 °F Hi 87 °F Hi 85 °F Hi 83 °F Hi 80 °F Hi 79 °F
 
Overnight

Overnight: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Thursday
Night
Thursday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Friday
Night
Friday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Saturday
Night
Saturday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Sunday
Night
Sunday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Monday
Night
Monday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
 
Lo 71 °F Lo 70 °F Lo 69 °F Lo 67 °F Lo 65 °F Lo 63 °F Lo 61 °F  

 

Overnight
 
A slight chance of showers and thunderstorms between 4am and 5am. Partly cloudy, with a low around 71. East wind around 0 mph. Chance of precipitation is 20%.
Wednesday
 
A slight chance of rain showers between noon and 3pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 90. Heat index values as high as 96. Southwest wind 0 to 10 mph. Chance of precipitation is 20%.
Wednesday Night
 
A chance of showers and thunderstorms after 8pm. Mostly clear, with a low around 70. Southeast wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
Thursday
 
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and noon, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 86. Southeast wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Thursday Night
 
A slight chance of showers and thunderstorms before 1am, then showers and thunderstorms likely. Partly cloudy, with a low around 69. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
 
Showers and thunderstorms likely before 1pm. Partly sunny, with a high near 87. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
 
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 67. Southeast wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Saturday
 
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 85. East wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Saturday Night
 
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 20%.
Sunday
 
A slight chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 20%.
Sunday Night
 
A slight chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.
Labor Day
 
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 30%.
Monday Night
 
A slight chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
Tuesday
 
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.