National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Wed, Sep-30-2026 2:36pm CDT
Cottage Grove
 
This
Afternoon
This Afternoon: Patchy Drizzle
Patchy Drizzle
Thursday

Thursday: Patchy Fog
Patchy Fog
Friday

Friday: Sunny
Sunny
Saturday

Saturday: Sunny
Sunny
Sunday

Sunday: Mostly Sunny
Mostly Sunny
Monday

Monday: Sunny
Sunny
Tuesday

Tuesday: Sunny
Sunny
 
Hi 68 °F Hi 68 °F Hi 63 °F Hi 65 °F Hi 68 °F Hi 61 °F Hi 64 °F  
 
Tonight

Tonight: Rain Showers
Rain Showers
Thursday
Night
Thursday Night: Slight Chance Rain Showers then Mostly Cloudy
Slight Chance Rain Showers then Mostly Cloudy
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: Clear
Clear
Tuesday
Night
Tuesday Night: Partly Cloudy then Slight Chance Rain Showers
Partly Cloudy then Slight Chance Rain Showers
 
Lo 63 °F Lo 48 °F Lo 41 °F Lo 47 °F Lo 41 °F Lo 39 °F Lo 51 °F  

 

This Afternoon
 
Patchy drizzle and patchy fog. Cloudy, with a high near 68. Southwest wind around 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Tonight
 
Patchy drizzle and patchy fog before 7pm, then patchy fog and a slight chance of rain showers between 7pm and 8pm, then rain showers and patchy fog between 8pm and 1am, then patchy fog and showers and thunderstorms. Cloudy, with a low around 63. Southwest wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Thursday
 
Patchy fog and showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a high near 68. North wind 0 to 5 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Thursday Night
 
A slight chance of rain showers before 7pm. Mostly cloudy, with a low around 48. North wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Friday
 
Sunny, with a high near 63. North wind 5 to 10 mph.
Friday Night
 
Mostly clear, with a low around 41. North wind 0 to 5 mph.
Saturday
 
Sunny, with a high near 65. Southeast wind 0 to 5 mph.
Saturday Night
 
Partly cloudy, with a low around 47. Southwest wind around 5 mph.
Sunday
 
Mostly sunny, with a high near 68.
Sunday Night
 
Mostly clear, with a low around 41.
Monday
 
Sunny, with a high near 61.
Monday Night
 
Clear, with a low around 39.
Tuesday
 
Sunny, with a high near 64.
Tuesday Night
 
A slight chance of rain showers after 1am. Partly cloudy, with a low around 51. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.