National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Tue, Aug-11-2026 1:22am CDT
Cottage Grove
 
  Tuesday

Tuesday: Patchy Fog
Patchy Fog
Wednesday

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

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

Friday: Mostly Sunny
Mostly Sunny
Saturday

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

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

Monday: Mostly Sunny
Mostly Sunny
  Hi 82 °F Hi 83 °F Hi 80 °F Hi 77 °F Hi 77 °F Hi 78 °F Hi 78 °F
 
Overnight

Overnight: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Tuesday
Night
Tuesday Night: Partly Cloudy then Patchy Fog
Partly Cloudy then Patchy Fog
Wednesday
Night
Wednesday Night: Slight Chance Rain Showers then Partly Cloudy
Slight Chance Rain Showers then Partly Cloudy
Thursday
Night
Thursday Night: Slight Chance Showers And Thunderstorms then Mostly Cloudy
Slight Chance Showers And T-Storms then Mostly Cloudy
Friday
Night
Friday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Chance Showers And T-Storms then Showers And T-Storms Likely
Sunday
Night
Sunday Night: Mostly Cloudy
Mostly Cloudy
 
Lo 67 °F Lo 65 °F Lo 65 °F Lo 61 °F Lo 59 °F Lo 64 °F Lo 61 °F  

 

Overnight
 
A slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 67. East wind around 0 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Tuesday
 
Patchy fog and showers and thunderstorms likely before 9am, then showers and thunderstorms between 9am and 10am, then showers and thunderstorms likely between 10am and 3pm. Mostly cloudy, with a high near 82. Southeast wind 0 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night
 
Patchy fog after 3am. Partly cloudy, with a low around 65. Southeast wind 0 to 5 mph. New rainfall amounts less than a tenth of an inch possible.
Wednesday
 
Areas of fog before 9am, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. South wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Wednesday Night
 
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 65. Northeast wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Thursday
 
A chance of rain showers between 7am and 10am, then a chance of showers and thunderstorms between 10am and 1pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Northeast wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Thursday Night
 
A slight chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 61. Northeast wind around 5 mph. Chance of precipitation is 20%.
Friday
 
Mostly sunny, with a high near 77. East wind 5 to 10 mph.
Friday Night
 
A slight chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Saturday
 
Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.
Saturday Night
 
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 64. Chance of precipitation is 70%.
Sunday
 
Rain showers likely before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Mostly cloudy, with a high near 78. Chance of precipitation is 70%.
Sunday Night
 
Mostly cloudy, with a low around 61.
Monday
 
Mostly sunny, with a high near 78.

 

Forecast from NOAA-NWS for Cottage Grove, WI.