National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Mon, Aug-10-2026 8:56am CDT
Cottage Grove
 
Today

Today: Mostly Sunny
Mostly Sunny
Tuesday

Tuesday: Patchy Fog then Showers And Thunderstorms Likely
Patchy Fog then Showers And T-Storms Likely
Wednesday

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

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

Friday: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Saturday

Saturday: Chance Rain Showers
Chance Rain Showers
Sunday

Sunday: Chance Rain Showers then Slight Chance Showers And Thunderstorms
Chance Rain Showers then Slight Chance Showers And T-Storms
 
Hi 83 °F Hi 80 °F Hi 82 °F Hi 78 °F Hi 76 °F Hi 76 °F Hi 77 °F  
 
Tonight

Tonight: Chance Rain Showers
Chance Rain Showers
Tuesday
Night
Tuesday Night: Partly Cloudy then Chance Showers And Thunderstorms
Partly Cloudy then Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy
Thursday
Night
Thursday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Friday
Night
Friday Night: Chance Rain Showers
Chance Rain Showers
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Sunday
Night
Sunday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
 
Lo 66 °F Lo 65 °F Lo 63 °F Lo 58 °F Lo 58 °F Lo 61 °F Lo 59 °F  

 

Today
 
Mostly sunny, with a high near 83. East wind 0 to 5 mph.
Tonight
 
A chance of rain showers between 10pm and 2am. Mostly cloudy, with a low around 66. East wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Tuesday
 
Patchy fog before 7am, then patchy fog and a chance of showers and thunderstorms between 7am and 10am, then showers and thunderstorms likely between 10am and 2pm, then a slight chance of showers and thunderstorms between 3pm and 4pm. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 80. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night
 
A slight chance of rain showers between 1am and 4am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 65. Southeast wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Wednesday
 
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 82. Southwest wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
Wednesday Night
 
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 63. North wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Thursday
 
A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 78. East wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Thursday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. East wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Friday
 
A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 76. Chance of precipitation is 20%.
Friday Night
 
A chance of rain showers after 7pm. Mostly cloudy, with a low around 58. Chance of precipitation is 40%.
Saturday
 
A chance of rain showers. Mostly cloudy, with a high near 76. Chance of precipitation is 40%.
Saturday Night
 
A chance of rain showers before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 40%.
Sunday
 
A chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 77. Chance of precipitation is 40%.
Sunday Night
 
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 59. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.