National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Fri, May-15-2026 8:52am CDT
Cottage Grove
 
Today

Today: Sunny
Sunny
Saturday

Saturday: Mostly Sunny
Mostly Sunny
Sunday

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

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

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

Wednesday: Mostly Sunny
Mostly Sunny
Thursday

Thursday: Mostly Sunny
Mostly Sunny
 
Hi 78 °F Hi 83 °F Hi 82 °F Hi 85 °F Hi 81 °F Hi 66 °F Hi 67 °F  
 
Tonight

Tonight: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Sunday
Night
Sunday Night: Chance Rain Showers then Slight Chance Showers And Thunderstorms
Chance Rain Showers then Slight Chance Showers And T-Storms
Monday
Night
Monday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Tuesday
Night
Tuesday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Wednesday
Night
Wednesday Night: Partly Cloudy
Partly Cloudy
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
 
Lo 56 °F Lo 55 °F Lo 63 °F Lo 62 °F Lo 48 °F Lo 43 °F Lo 46 °F  

 

Today
 
Sunny, with a high near 78. South wind around 15 mph, with gusts as high as 30 mph.
Tonight
 
A chance of showers and thunderstorms between 11pm and 1am, then showers and thunderstorms. Mostly cloudy, with a low around 56. South wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Saturday
 
Mostly sunny, with a high near 83. West wind 5 to 10 mph. 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 55. Northeast wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Sunday
 
Rain showers likely before 10am, then showers and thunderstorms likely. Mostly cloudy, with a high near 82. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Sunday Night
 
A chance of rain showers before 7pm, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 63. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Monday
 
A chance of showers and thunderstorms before 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 85. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Monday Night
 
Showers and thunderstorms likely. Mostly cloudy, with a low around 62. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
 
Showers and thunderstorms likely. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Tuesday Night
 
Showers and thunderstorms likely before 1am. Mostly cloudy, with a low around 48. Chance of precipitation is 60%.
Wednesday
 
Mostly sunny, with a high near 66.
Wednesday Night
 
Partly cloudy, with a low around 43.
Thursday
 
Mostly sunny, with a high near 67.
Thursday Night
 
Partly cloudy, with a low around 46.

 

Forecast from NOAA-NWS for Cottage Grove, WI.