National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Fri, Mar-06-2026 9:57pm CST
Cottage Grove
 
  Saturday

Saturday: Chance Rain Showers then Mostly Cloudy
Chance Rain Showers then Mostly Cloudy
Sunday

Sunday: Sunny
Sunny
Monday

Monday: Sunny
Sunny
Tuesday

Tuesday: Mostly Sunny then Chance Rain Showers
Mostly Sunny then Chance Rain Showers
Wednesday

Wednesday: Chance Light Rain
Chance Light Rain
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Friday

Friday: Slight Chance Rain And Snow
Slight Chance Rain And Snow
  Hi 56 °F Hi 60 °F Hi 69 °F Hi 56 °F Hi 42 °F Hi 49 °F Hi 56 °F
 
Tonight

Tonight: Patchy Fog
Patchy Fog
Saturday
Night
Saturday Night: Mostly Clear
Mostly Clear
Sunday
Night
Sunday Night: Partly Cloudy
Partly Cloudy
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday
Night
Tuesday Night: Chance Light Rain
Chance Light Rain
Wednesday
Night
Wednesday Night: Chance Light Rain then Mostly Clear
Chance Light Rain then Mostly Clear
Thursday
Night
Thursday Night: Mostly Cloudy then Slight Chance Rain And Snow
Mostly Cloudy then Slight Chance Rain And Snow
 
Lo 51 °F Lo 33 °F Lo 45 °F Lo 38 °F Lo 30 °F Lo 24 °F Lo 35 °F  

 

Tonight
 
Showers and thunderstorms likely between 11pm and midnight, then patchy fog and showers and thunderstorms. Mostly cloudy. Low around 51, with temperatures rising to around 56 overnight. Southwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
 
A chance of rain showers before 7am, then a chance of rain showers and patchy fog between 7am and 10am. Mostly cloudy. High near 56, with temperatures falling to around 40 in the afternoon. West wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Saturday Night
 
Mostly clear, with a low around 33. West wind around 10 mph.
Sunday
 
Sunny, with a high near 60. Southwest wind around 15 mph, with gusts as high as 30 mph.
Sunday Night
 
Partly cloudy, with a low around 45. Southwest wind around 15 mph, with gusts as high as 30 mph.
Monday
 
Sunny. High near 69, with temperatures falling to around 64 in the afternoon. Southwest wind 5 to 15 mph.
Monday Night
 
Mostly clear, with a low around 38. North wind 5 to 10 mph.
Tuesday
 
A chance of rain showers after 1pm. Mostly sunny. High near 56, with temperatures falling to around 50 in the afternoon. East wind 10 to 15 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Tuesday Night
 
A chance of rain showers before 7pm, then a chance of rain. Mostly cloudy, with a low around 30. Chance of precipitation is 50%.
Wednesday
 
A chance of rain. Mostly cloudy, with a high near 42. Chance of precipitation is 40%.
Wednesday Night
 
A chance of rain before 7pm. Mostly clear, with a low around 24. Chance of precipitation is 30%.
Thursday
 
Mostly sunny, with a high near 49.
Thursday Night
 
A slight chance of rain and snow after 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 20%.
Friday
 
A slight chance of rain and snow before 1pm. Mostly cloudy, with a high near 56. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.