National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Tue, Sep-29-2026 12:21pm CDT
Cottage Grove
 
This
Afternoon
This Afternoon: Partly Sunny
Partly Sunny
Wednesday

Wednesday: Rain Showers
Rain Showers
Thursday

Thursday: Rain Showers
Rain Showers
Friday

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

Saturday: Sunny
Sunny
Sunday

Sunday: Mostly Sunny
Mostly Sunny
Monday

Monday: Sunny
Sunny
 
Hi 74 °F Hi 71 °F Hi 68 °F Hi 65 °F Hi 65 °F Hi 65 °F Hi 62 °F  
 
Tonight

Tonight: Rain Showers
Rain Showers
Wednesday
Night
Wednesday Night: Rain Showers
Rain Showers
Thursday
Night
Thursday Night: Rain Showers Likely
Rain Showers Likely
Friday
Night
Friday Night: Mostly Clear
Mostly Clear
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
 
Lo 61 °F Lo 62 °F Lo 49 °F Lo 43 °F Lo 47 °F Lo 41 °F Lo 41 °F  

 

This Afternoon
 
Partly sunny, with a high near 74. South wind 5 to 10 mph.
Tonight
 
Rain showers after 8pm. Cloudy, with a low around 61. South wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Wednesday
 
Rain showers. Cloudy, with a high near 71. South wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Wednesday Night
 
Rain showers. Cloudy, with a low around 62. Southwest wind 0 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
 
Rain showers. Cloudy, with a high near 68. Northwest wind 0 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Thursday Night
 
Rain showers likely. Mostly cloudy, with a low around 49. North wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Friday
 
A slight chance of rain showers before 7am. Mostly sunny, with a high near 65. North wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Friday Night
 
Mostly clear, with a low around 43. Northeast wind 0 to 5 mph.
Saturday
 
Sunny, with a high near 65.
Saturday Night
 
Partly cloudy, with a low around 47.
Sunday
 
Mostly sunny, with a high near 65.
Sunday Night
 
Mostly clear, with a low around 41.
Monday
 
Sunny, with a high near 62.
Monday Night
 
Mostly clear, with a low around 41.

 

Forecast from NOAA-NWS for Cottage Grove, WI.