National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Fri, Aug-14-2026 6:31am CDT
Cottage Grove
 
Today

Today: Patchy Fog then Mostly Cloudy
Patchy Fog then Mostly Cloudy
Saturday

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

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

Monday: Sunny
Sunny
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Wednesday

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

Thursday: Chance Showers And Thunderstorms then Mostly Sunny
Chance Showers And T-Storms then Mostly Sunny
 
Hi 82 °F Hi 82 °F Hi 82 °F Hi 79 °F Hi 80 °F Hi 77 °F Hi 74 °F  
 
Tonight

Tonight: Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms then Chance Showers And T-Storms
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday
Night
Tuesday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Wednesday
Night
Wednesday Night: Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Chance Showers And T-Storms then Slight Chance Showers And T-Storms
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
 
Lo 64 °F Lo 68 °F Lo 61 °F Lo 59 °F Lo 63 °F Lo 58 °F Lo 56 °F  

 

Today
 
Patchy fog before 8am. Mostly cloudy, with a high near 82. East wind 5 to 10 mph.
Tonight
 
A slight chance of rain showers between 8pm and 10pm, then a slight chance of showers and thunderstorms between 10pm and 11pm, then a chance of showers and thunderstorms between 11pm and 1am, then a chance of showers and thunderstorms between 1am and 4am, then showers and thunderstorms likely between 4am and 5am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Saturday
 
Showers and thunderstorms likely before 8am, then patchy fog and showers and thunderstorms likely between 8am and 1pm, then a chance of showers and thunderstorms between 1pm and 5pm. Cloudy, with a high near 82. Southeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Saturday Night
 
A chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 68. Northwest wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Sunday
 
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 82. Northwest wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Sunday Night
 
Mostly clear, with a low around 61. North wind 5 to 10 mph.
Monday
 
Sunny, with a high near 79. Northwest wind 0 to 5 mph.
Monday Night
 
Mostly clear, with a low around 59. Southwest wind 0 to 5 mph.
Tuesday
 
Mostly sunny, with a high near 80.
Tuesday Night
 
A chance of rain showers between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.
Wednesday
 
Showers and thunderstorms likely. Partly sunny, with a high near 77. Chance of precipitation is 70%.
Wednesday Night
 
A chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 58. Chance of precipitation is 30%.
Thursday
 
A chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 74. Chance of precipitation is 30%.
Thursday Night
 
Partly cloudy, with a low around 56.

 

Forecast from NOAA-NWS for Cottage Grove, WI.