National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Mon, Jul-20-2026 5:36pm CDT
Cottage Grove
 
  Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Wednesday

Wednesday: Sunny
Sunny
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Mostly Sunny
Mostly Sunny
Saturday

Saturday: Sunny
Sunny
Sunday

Sunday: Mostly Sunny
Mostly Sunny
Monday

Monday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
  Hi 79 °F Hi 75 °F Hi 79 °F Hi 81 °F Hi 85 °F Hi 90 °F Hi 86 °F
 
Tonight

Tonight: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy
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: Mostly Clear
Mostly Clear
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
Sunday
Night
Sunday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
 
Lo 68 °F Lo 52 °F Lo 54 °F Lo 58 °F Lo 59 °F Lo 65 °F Lo 67 °F  

Air Quality Alert issued July 20 at 12:14PM CDT
Air Quality Alert issued July 20 at 11:46AM CDT
 

Tonight
 
A chance of showers and thunderstorms before 8pm, then showers and thunderstorms likely between 8pm and 9pm, then a chance of showers and thunderstorms between 9pm and 10pm. Some of the storms could be severe. Partly cloudy, with a low around 68. West wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Tuesday
 
Mostly sunny, with a high near 79. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.
Tuesday Night
 
Mostly clear, with a low around 52. North wind 5 to 15 mph.
Wednesday
 
Sunny, with a high near 75. North wind 5 to 10 mph.
Wednesday Night
 
Mostly clear, with a low around 54. Northwest wind 0 to 5 mph.
Thursday
 
Sunny, with a high near 79. Southwest wind 0 to 5 mph.
Thursday Night
 
Partly cloudy, with a low around 58. Southwest wind 0 to 5 mph.
Friday
 
Mostly sunny, with a high near 81. Southwest wind 0 to 5 mph.
Friday Night
 
Mostly clear, with a low around 59.
Saturday
 
Sunny, with a high near 85.
Saturday Night
 
Mostly clear, with a low around 65.
Sunday
 
Mostly sunny, with a high near 90.
Sunday 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 67. Chance of precipitation is 30%.
Monday
 
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.