National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Mon, Aug-24-2026 11:46pm CDT
Cottage Grove
 
  Tuesday

Tuesday: Patchy Fog then Mostly Sunny
Patchy Fog then Mostly Sunny
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Sunny
Sunny
Saturday

Saturday: Slight Chance Rain Showers
Slight Chance Rain Showers
Sunday

Sunday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Monday

Monday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
  Hi 80 °F Hi 82 °F Hi 80 °F Hi 80 °F Hi 80 °F Hi 83 °F Hi 83 °F
 
Overnight

Overnight: Patchy Fog
Patchy Fog
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
Partly Cloudy
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Sunday
Night
Sunday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
 
Lo 55 °F Lo 63 °F Lo 61 °F Lo 58 °F Lo 60 °F Lo 64 °F Lo 68 °F  

 

Overnight
 
Patchy fog after 1am. Mostly clear, with a low around 55. South wind around 0 mph.
Tuesday
 
Patchy fog before 8am. Mostly sunny, with a high near 80. Southwest wind 0 to 10 mph.
Tuesday Night
 
A chance of showers and thunderstorms between 1am and 5am. Partly cloudy, with a low around 63. South wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Wednesday
 
Mostly sunny, with a high near 82. West wind around 10 mph. New rainfall amounts between a tenth and quarter of an inch possible.
Wednesday Night
 
Mostly clear, with a low around 61. Northwest wind 5 to 10 mph.
Thursday
 
Sunny, with a high near 80. Northwest wind around 5 mph.
Thursday Night
 
Mostly clear, with a low around 58. North wind 0 to 5 mph.
Friday
 
Sunny, with a high near 80. Southeast wind 0 to 5 mph.
Friday Night
 
Partly cloudy, with a low around 60.
Saturday
 
A slight chance of rain showers between 7am and 1pm. Partly sunny, with a high near 80. Chance of precipitation is 20%.
Saturday Night
 
A chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 64. Chance of precipitation is 50%.
Sunday
 
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 83. Chance of precipitation is 50%.
Sunday 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 68. Chance of precipitation is 40%.
Monday
 
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 83. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.