National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Sat, Aug-15-2026 8:41pm CDT
Cottage Grove
 
  Sunday

Sunday: Slight Chance Rain Showers then Mostly Cloudy
Slight Chance Rain Showers then Mostly Cloudy
Monday

Monday: Sunny
Sunny
Tuesday

Tuesday: Partly Sunny then Chance Showers And Thunderstorms
Partly Sunny then Chance Showers And T-Storms
Wednesday

Wednesday: Rain Showers Likely
Rain Showers Likely
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Friday

Friday: Mostly Sunny then Slight Chance Rain Showers
Mostly Sunny then Slight Chance Rain Showers
Saturday

Saturday: Slight Chance Rain Showers then Mostly Sunny
Slight Chance Rain Showers then Mostly Sunny
  Hi 82 °F Hi 80 °F Hi 81 °F Hi 76 °F Hi 76 °F Hi 77 °F Hi 78 °F
 
Tonight

Tonight: Chance Rain Showers
Chance Rain Showers
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
Tuesday
Night
Tuesday Night: Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Chance Showers And T-Storms then Showers And T-Storms Likely
Wednesday
Night
Wednesday Night: Partly Cloudy
Partly Cloudy
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
Friday
Night
Friday Night: Slight Chance Rain Showers
Slight Chance Rain Showers
 
Lo 70 °F Lo 60 °F Lo 62 °F Lo 61 °F Lo 55 °F Lo 57 °F Lo 59 °F  

 

Tonight
 
A chance of rain showers between 11pm and midnight, then a chance of showers and thunderstorms. Cloudy, with a low around 70. Southwest wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Sunday
 
A slight chance of rain showers before 8am. Mostly cloudy, with a high near 82. Northwest wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Sunday Night
 
Mostly clear, with a low around 60. Northwest wind 0 to 10 mph.
Monday
 
Sunny, with a high near 80. Northwest wind 0 to 5 mph.
Monday Night
 
Partly cloudy, with a low around 62. Southwest wind around 5 mph.
Tuesday
 
A chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Southwest wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Tuesday Night
 
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 61. Northwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
 
Rain showers likely before 1pm. Partly sunny, with a high near 76. North wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
 
Partly cloudy, with a low around 55.
Thursday
 
Mostly sunny, with a high near 76.
Thursday Night
 
Partly cloudy, with a low around 57.
Friday
 
A slight chance of rain showers after 1pm. Mostly sunny, with a high near 77. Chance of precipitation is 20%.
Friday Night
 
A slight chance of rain showers. 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 78. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.