National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Sun, May-31-2026 1:21am CDT
Cottage Grove
 
  Sunday

Sunday: Partly Sunny
Partly Sunny
Monday

Monday: Partly Sunny
Partly Sunny
Tuesday

Tuesday: Sunny
Sunny
Wednesday

Wednesday: Sunny
Sunny
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Friday

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

Saturday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
  Hi 77 °F Hi 76 °F Hi 79 °F Hi 83 °F Hi 86 °F Hi 86 °F Hi 85 °F
 
Overnight

Overnight: Mostly Cloudy
Mostly 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: Partly Cloudy
Partly Cloudy
Thursday
Night
Thursday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Friday
Night
Friday Night: Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Chance Showers And T-Storms then Showers And T-Storms Likely
 
Lo 50 °F Lo 53 °F Lo 50 °F Lo 50 °F Lo 57 °F Lo 63 °F Lo 62 °F  

 

Overnight
 
Mostly cloudy, with a low around 50. East wind around 5 mph.
Sunday
 
Partly sunny, with a high near 77. Southeast wind 5 to 10 mph.
Sunday Night
 
Mostly cloudy, with a low around 53. East wind around 5 mph.
Monday
 
Partly sunny, with a high near 76. Northeast wind 5 to 10 mph.
Monday Night
 
Mostly clear, with a low around 50. Northeast wind 0 to 5 mph.
Tuesday
 
Sunny, with a high near 79. East wind 5 to 10 mph.
Tuesday Night
 
Mostly clear, with a low around 50. East wind 0 to 5 mph.
Wednesday
 
Sunny, with a high near 83. South wind 0 to 5 mph.
Wednesday Night
 
Partly cloudy, with a low around 57.
Thursday
 
Mostly sunny, with a high near 86.
Thursday Night
 
A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.
Friday
 
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Friday Night
 
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Saturday
 
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 50%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.