National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Mon, Jul-13-2026 12:31am CDT
Cottage Grove
 
  Monday

Monday: Sunny
Sunny
Tuesday

Tuesday: Sunny
Sunny
Wednesday

Wednesday: Sunny
Sunny
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Mostly Sunny
Mostly Sunny
Saturday

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

Sunday: Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
Slight Chance Rain Showers then Slight Chance Showers And T-Storms
  Hi 92 °F Hi 95 °F Hi 94 °F Hi 90 °F Hi 89 °F Hi 88 °F Hi 86 °F
 
Overnight

Overnight: Clear
Clear
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
Friday
Night
Friday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Saturday
Night
Saturday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy
 
Lo 67 °F Lo 69 °F Lo 71 °F Lo 70 °F Lo 68 °F Lo 68 °F Lo 66 °F  

 

Overnight
 
Clear, with a low around 67. West wind around 5 mph.
Monday
 
Sunny, with a high near 92. Heat index values as high as 95. West wind around 5 mph.
Monday Night
 
Mostly clear, with a low around 69. West wind around 5 mph.
Tuesday
 
Sunny, with a high near 95. Heat index values as high as 97. Northwest wind around 5 mph.
Tuesday Night
 
Mostly clear, with a low around 71. West wind around 5 mph.
Wednesday
 
Sunny, with a high near 94. Northwest wind around 5 mph.
Wednesday Night
 
Mostly clear, with a low around 70. North wind 0 to 5 mph.
Thursday
 
Sunny, with a high near 90. West wind 0 to 5 mph.
Thursday Night
 
Partly cloudy, with a low around 68.
Friday
 
Mostly sunny, with a high near 89.
Friday Night
 
A slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
Saturday
 
A slight chance of rain showers before 1pm, then 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 before 7pm. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
Sunday
 
A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.