National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Sat, Sep-05-2026 8:42pm CDT
Cottage Grove
 
  Sunday

Sunday: Patchy Fog then Mostly Sunny
Patchy Fog then Mostly Sunny
Labor
Day
Labor Day: Mostly Sunny
Mostly Sunny
Tuesday

Tuesday: Partly Sunny
Partly Sunny
Wednesday

Wednesday: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Friday

Friday: Mostly Sunny
Mostly Sunny
Saturday

Saturday: Slight Chance Rain Showers then Mostly Sunny
Slight Chance Rain Showers then Mostly Sunny
  Hi 79 °F Hi 78 °F Hi 84 °F Hi 84 °F Hi 78 °F Hi 79 °F Hi 81 °F
 
Tonight

Tonight: Partly Cloudy then Patchy Fog
Partly Cloudy then Patchy Fog
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
Tuesday
Night
Tuesday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Partly Cloudy
Partly Cloudy
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
 
Lo 60 °F Lo 57 °F Lo 60 °F Lo 69 °F Lo 59 °F Lo 55 °F Lo 59 °F  

 

Tonight
 
Patchy fog after 2am. Partly cloudy, with a low around 60. Northeast wind 0 to 5 mph.
Sunday
 
Patchy fog before 8am. Mostly sunny, with a high near 79. East wind around 5 mph.
Sunday Night
 
Mostly clear, with a low around 57. East wind 0 to 5 mph.
Labor Day
 
Mostly sunny, with a high near 78. Southeast wind 0 to 10 mph.
Monday Night
 
Partly cloudy, with a low around 60. Southeast wind around 5 mph.
Tuesday
 
Partly sunny, with a high near 84. South wind around 10 mph.
Tuesday Night
 
A slight chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 69. Southwest wind 10 to 15 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
Wednesday
 
Showers and thunderstorms likely before 1pm. Partly sunny, with a high near 84. West wind 10 to 15 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
Wednesday Night
 
Partly cloudy, with a low around 59.
Thursday
 
Mostly sunny, with a high near 78.
Thursday Night
 
Mostly clear, with a low around 55.
Friday
 
Mostly sunny, with a high near 79.
Friday Night
 
A slight chance of rain showers after 1am. Partly cloudy, with a low around 59. Chance of precipitation is 20%.
Saturday
 
A slight chance of rain showers before 7am. Mostly sunny, with a high near 81. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.