National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Tue, Sep-01-2026 2:41am CDT
Cottage Grove
 
  Tuesday

Tuesday: Patchy Fog then Slight Chance Rain Showers
Patchy Fog then Slight Chance Rain Showers
Wednesday

Wednesday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
Thursday

Thursday: Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Slight Chance Showers And T-Storms then Showers And T-Storms Likely
Friday

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

Saturday: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Sunday

Sunday: Chance Rain Showers
Chance Rain Showers
Labor
Day
Labor Day: Slight Chance Rain Showers then Partly Sunny
Slight Chance Rain Showers then Partly Sunny
  Hi 90 °F Hi 89 °F Hi 86 °F Hi 88 °F Hi 87 °F Hi 84 °F Hi 78 °F
 
Overnight

Overnight: Patchy Fog
Patchy Fog
Tuesday
Night
Tuesday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Thursday
Night
Thursday Night: Partly Cloudy then Chance Showers And Thunderstorms
Partly Cloudy then Chance Showers And T-Storms
Friday
Night
Friday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Saturday
Night
Saturday Night: Chance Rain Showers
Chance Rain Showers
Sunday
Night
Sunday Night: Slight Chance Rain Showers
Slight Chance Rain Showers
 
Lo 70 °F Lo 71 °F Lo 69 °F Lo 69 °F Lo 69 °F Lo 67 °F Lo 63 °F  

 

Overnight
 
Patchy fog. Mostly cloudy, with a low around 70. West wind around 0 mph.
Tuesday
 
Patchy fog before 9am, then a slight chance of rain showers between 2pm and 4pm. Partly sunny, with a high near 90. Heat index values as high as 96. Southwest wind 0 to 10 mph. Chance of precipitation is 20%.
Tuesday Night
 
A slight chance of showers and thunderstorms before 5am. Partly cloudy, with a low around 71. Southwest wind 0 to 5 mph. Chance of precipitation is 20%.
Wednesday
 
A slight chance of showers and thunderstorms between 1pm and 2pm. Mostly sunny, with a high near 89. Heat index values as high as 95. South wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Wednesday Night
 
A chance of showers and thunderstorms between 7pm and 1am, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 69. Southwest wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Thursday
 
A slight chance of showers and thunderstorms before 7am, then showers and thunderstorms likely between 7am and 1pm. Partly sunny, with a high near 86. South wind 0 to 5 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Thursday Night
 
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69. Southeast wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Friday
 
A chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 88. South wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts between a half and three quarters of an inch possible.
Friday Night
 
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 69. Chance of precipitation is 30%.
Saturday
 
A chance of rain showers before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
Saturday Night
 
A chance of rain showers after 7pm. Partly cloudy, with a low around 67. Chance of precipitation is 40%.
Sunday
 
A chance of rain showers before 1pm. Mostly sunny, with a high near 84. Chance of precipitation is 40%.
Sunday Night
 
A slight chance of rain showers after 7pm. Partly cloudy, with a low around 63. Chance of precipitation is 20%.
Labor Day
 
A slight chance of rain showers before 7am. Partly sunny, with a high near 78. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.