National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Mon, Jul-13-2026 2:42pm CDT
Cottage Grove
 
This
Afternoon
This Afternoon: Sunny
Sunny
Tuesday

Tuesday: Sunny
Sunny
Wednesday

Wednesday: Sunny
Sunny
Thursday

Thursday: Sunny
Sunny
Friday

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

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

Sunday: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
 
Hi 92 °F Hi 96 °F Hi 96 °F Hi 93 °F Hi 91 °F Hi 88 °F Hi 84 °F  
 
Tonight

Tonight: Mostly Clear
Mostly Clear
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday
Night
Friday Night: 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: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Sunday
Night
Sunday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
 
Lo 69 °F Lo 70 °F Lo 70 °F Lo 70 °F Lo 71 °F Lo 65 °F Lo 62 °F  

Heat Advisory issued July 13 at 11:45AM CDT until July 15 at 8:00PM CDT
 

This Afternoon
 
Sunny, with a high near 92. Heat index values as high as 96. West wind 5 to 10 mph.
Tonight
 
Mostly clear, with a low around 69. Heat index values as high as 95. West wind around 5 mph.
Tuesday
 
Sunny, with a high near 96. Heat index values as high as 100. West wind around 5 mph.
Tuesday Night
 
Mostly clear, with a low around 70. Heat index values as high as 97. West wind around 5 mph.
Wednesday
 
Sunny, with a high near 96. Northwest wind around 5 mph.
Wednesday Night
 
Mostly clear, with a low around 70. West wind 0 to 5 mph.
Thursday
 
Sunny, with a high near 93. Northwest wind 0 to 5 mph.
Thursday Night
 
Mostly clear, with a low around 70. East wind around 5 mph.
Friday
 
A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 20%.
Friday Night
 
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 71. Chance of precipitation is 30%.
Saturday
 
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
Saturday Night
 
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 20%.
Sunday
 
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
Sunday Night
 
A slight chance of showers and thunderstorms. Mostly clear, with a low around 62. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.