National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Thu, Aug-27-2026 2:41am CDT
Cottage Grove
 
  Thursday

Thursday: Mostly Sunny
Mostly Sunny
Friday

Friday: Sunny
Sunny
Saturday

Saturday: Mostly Cloudy then Slight Chance Rain Showers
Mostly Cloudy then Slight Chance Rain Showers
Sunday

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

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

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

Wednesday: Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Chance Showers And T-Storms then Slight Chance Showers And T-Storms
  Hi 81 °F Hi 82 °F Hi 79 °F Hi 86 °F Hi 86 °F Hi 85 °F Hi 85 °F
 
Overnight

Overnight: Clear
Clear
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
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: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Tuesday
Night
Tuesday Night: Chance Rain Showers
Chance Rain Showers
 
Lo 62 °F Lo 57 °F Lo 61 °F Lo 65 °F Lo 70 °F Lo 69 °F Lo 67 °F  

 

Overnight
 
Clear, with a low around 62. Northwest wind 0 to 5 mph.
Thursday
 
Mostly sunny, with a high near 81. Northwest wind 5 to 10 mph.
Thursday Night
 
Mostly clear, with a low around 57. Southwest wind 0 to 5 mph.
Friday
 
Sunny, with a high near 82. Southwest wind 0 to 5 mph.
Friday Night
 
Partly cloudy, with a low around 61. Southwest wind 0 to 5 mph.
Saturday
 
A slight chance of rain showers after 1pm. Mostly cloudy, with a high near 79. South wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday Night
 
A slight chance of rain showers before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 65. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
 
Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Southwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
 
A chance of showers and thunderstorms before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Monday
 
Showers and thunderstorms likely before 7am, then a chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Monday Night
 
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 69. Chance of precipitation is 40%.
Tuesday
 
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 40%.
Tuesday Night
 
A chance of rain showers before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
Wednesday
 
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 85. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.