National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Sun, Jun-28-2026 1:56am CDT
Cottage Grove
 
  Sunday

Sunday: Partly Sunny then Slight Chance Rain Showers
Partly Sunny then Slight Chance Rain Showers
Monday

Monday: Mostly Sunny
Mostly Sunny
Tuesday

Tuesday: Sunny
Sunny
Wednesday

Wednesday: Sunny
Sunny
Thursday

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

Friday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Independence
Day
Independence Day: Chance Showers And Thunderstorms
Chance Showers And T-Storms
  Hi 82 °F Hi 93 °F Hi 93 °F Hi 92 °F Hi 91 °F Hi 90 °F Hi 89 °F
 
Overnight

Overnight: Partly Cloudy
Partly Cloudy
Sunday
Night
Sunday Night: Mostly Cloudy
Mostly Cloudy
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday
Night
Wednesday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Thursday
Night
Thursday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Friday
Night
Friday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
 
Lo 58 °F Lo 72 °F Lo 75 °F Lo 75 °F Lo 74 °F Lo 72 °F Lo 70 °F  

Extreme Heat Watch issued June 28 at 1:51AM CDT until June 30 at 8:00AM CDT
 

Overnight
 
Partly cloudy, with a low around 58. East wind around 5 mph.
Sunday
 
A slight chance of rain showers between 2pm and 4pm. Partly sunny, with a high near 82. Southeast wind 5 to 15 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Sunday Night
 
Mostly cloudy, with a low around 72. Southeast wind 10 to 15 mph. New rainfall amounts less than a tenth of an inch possible.
Monday
 
Mostly sunny, with a high near 93. Heat index values as high as 103. South wind 10 to 15 mph, with gusts as high as 30 mph.
Monday Night
 
Mostly clear, with a low around 75. Southwest wind 10 to 15 mph.
Tuesday
 
Sunny, with a high near 93. Southwest wind 10 to 15 mph.
Tuesday Night
 
Mostly clear, with a low around 75. Southwest wind 10 to 15 mph.
Wednesday
 
Sunny, with a high near 92. Southwest wind around 10 mph.
Wednesday Night
 
A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly clear, with a low around 74. Chance of precipitation is 30%.
Thursday
 
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
Thursday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. Chance of precipitation is 40%.
Friday
 
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 40%.
Friday Night
 
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 40%.
Independence Day
 
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.