National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Sun, Sep-20-2026 7:33pm CDT
Cottage Grove
 
  Monday

Monday: Mostly Cloudy
Mostly Cloudy
Tuesday

Tuesday: Partly Sunny
Partly Sunny
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Friday

Friday: Partly Sunny
Partly Sunny
Saturday

Saturday: Partly Sunny
Partly Sunny
Sunday

Sunday: Partly Sunny
Partly Sunny
  Hi 62 °F Hi 62 °F Hi 64 °F Hi 65 °F Hi 67 °F Hi 69 °F Hi 71 °F
 
Tonight

Tonight: Mostly Cloudy
Mostly Cloudy
Monday
Night
Monday Night: Mostly Cloudy
Mostly Cloudy
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Mostly Cloudy
Mostly Cloudy
Friday
Night
Friday Night: Mostly Cloudy
Mostly Cloudy
Saturday
Night
Saturday Night: Mostly Cloudy
Mostly Cloudy
 
Lo 54 °F Lo 48 °F Lo 45 °F Lo 46 °F Lo 48 °F Lo 48 °F Lo 50 °F  

 

Tonight
 
Mostly cloudy, with a low around 54. Northeast wind 10 to 15 mph.
Monday
 
Mostly cloudy, with a high near 62. Northeast wind 10 to 15 mph.
Monday Night
 
Mostly cloudy, with a low around 48. Northeast wind 5 to 10 mph.
Tuesday
 
Partly sunny, with a high near 62. Northeast wind around 10 mph.
Tuesday Night
 
Mostly clear, with a low around 45. Northeast wind 5 to 10 mph.
Wednesday
 
Mostly sunny, with a high near 64. Northeast wind 5 to 10 mph.
Wednesday Night
 
Mostly clear, with a low around 46. Northeast wind 0 to 5 mph.
Thursday
 
Mostly sunny, with a high near 65. East wind 0 to 5 mph.
Thursday Night
 
Mostly cloudy, with a low around 48.
Friday
 
Partly sunny, with a high near 67.
Friday Night
 
Mostly cloudy, with a low around 48.
Saturday
 
Partly sunny, with a high near 69.
Saturday Night
 
Mostly cloudy, with a low around 50.
Sunday
 
Partly sunny, with a high near 71.

 

Forecast from NOAA-NWS for Cottage Grove, WI.