National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Mon, Aug-24-2026 5:07am CDT
Cottage Grove
 
  Monday

Monday: Mostly Sunny
Mostly Sunny
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Wednesday

Wednesday: Chance Rain Showers then Sunny
Chance Rain Showers then Sunny
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Sunny
Sunny
Saturday

Saturday: Chance Rain Showers
Chance Rain Showers
Sunday

Sunday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
  Hi 78 °F Hi 81 °F Hi 83 °F Hi 81 °F Hi 80 °F Hi 81 °F Hi 82 °F
 
Overnight

Overnight: Patchy Fog
Patchy Fog
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday
Night
Tuesday Night: Partly Cloudy then Chance Showers And Thunderstorms
Partly Cloudy then Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday
Night
Friday Night: Partly Cloudy then Slight Chance Rain Showers
Partly Cloudy then Slight Chance Rain Showers
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
 
Lo 49 °F Lo 55 °F Lo 63 °F Lo 60 °F Lo 57 °F Lo 59 °F Lo 64 °F  

 

Overnight
 
Patchy fog. Mostly clear, with a low around 49. Wind around 0 mph.
Monday
 
Mostly sunny, with a high near 78. North wind 0 to 5 mph.
Monday Night
 
Mostly clear, with a low around 55. South wind 0 to 5 mph.
Tuesday
 
Mostly sunny, with a high near 81. Southwest wind 0 to 10 mph.
Tuesday Night
 
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63. South wind 5 to 10 mph. Chance of precipitation is 40%.
Wednesday
 
A chance of rain showers before 7am. Sunny, with a high near 83. West wind around 10 mph. Chance of precipitation is 40%.
Wednesday Night
 
Mostly clear, with a low around 60. Northwest wind 5 to 10 mph.
Thursday
 
Sunny, with a high near 81. Northwest wind around 5 mph.
Thursday Night
 
Mostly clear, with a low around 57.
Friday
 
Sunny, with a high near 80.
Friday Night
 
A slight chance of rain showers after 1am. Partly cloudy, with a low around 59. Chance of precipitation is 20%.
Saturday
 
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 30%.
Saturday Night
 
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 50%.
Sunday
 
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 50%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.