National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Sun, Mar-29-2026 3:33pm CDT
Cottage Grove
 
This
Afternoon
This Afternoon: Mostly Sunny
Mostly Sunny
Monday

Monday: Sunny
Sunny
Tuesday

Tuesday: Rain
Rain
Wednesday

Wednesday: Mostly Cloudy then Slight Chance Rain And Snow
Mostly Cloudy then Slight Chance Rain And Snow
Thursday

Thursday: Freezing Rain Likely
Freezing Rain Likely
Friday

Friday: Chance Light Rain
Chance Light Rain
Saturday

Saturday: Rain Likely
Rain Likely
 
Hi 65 °F Hi 75 °F Hi 71 °F Hi 46 °F Hi 42 °F Hi 49 °F Hi 58 °F  
 
Tonight

Tonight: Mostly Clear
Mostly Clear
Monday
Night
Monday Night: Rain Likely
Rain Likely
Tuesday
Night
Tuesday Night: Light Rain
Light Rain
Wednesday
Night
Wednesday Night: Rain And Snow Likely
Rain And Snow Likely
Thursday
Night
Thursday Night: Rain And Snow Likely
Rain And Snow Likely
Friday
Night
Friday Night: Chance Rain
Chance Rain
Saturday
Night
Saturday Night: Rain Likely
Rain Likely
 
Lo 43 °F Lo 54 °F Lo 34 °F Lo 31 °F Lo 31 °F Lo 37 °F Lo 37 °F  

 

This Afternoon
 
Mostly sunny, with a high near 65. South wind around 15 mph.
Tonight
 
Mostly clear, with a low around 43. Southwest wind 5 to 10 mph.
Monday
 
Sunny, with a high near 75. South wind 5 to 10 mph.
Monday Night
 
A chance of rain between 7pm and 10pm, then rain likely and scattered thunderstorms. Mostly cloudy, with a low around 54. South wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
 
Rain and scattered thunderstorms. Mostly cloudy. High near 71, with temperatures falling to around 62 in the afternoon. West wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night
 
Rain and scattered thunderstorms before 1am. Mostly cloudy, with a low around 34. North wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Wednesday
 
A slight chance of rain and snow after 1pm. Mostly cloudy, with a high near 46. Northeast wind 10 to 15 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Wednesday Night
 
Rain and snow likely before 4am, then freezing rain likely and rain and snow likely. Mostly cloudy, with a low around 31. Northeast wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of around one inch possible. Little or no ice accumulation expected.
Thursday
 
Freezing rain likely and rain and snow likely. Mostly cloudy, with a high near 42. Chance of precipitation is 70%. New snow accumulation of less than one inch possible. Little or no ice accumulation expected.
Thursday Night
 
Rain and snow likely. Mostly cloudy, with a low around 31. Chance of precipitation is 60%.
Friday
 
A chance of rain. Mostly cloudy, with a high near 49. Chance of precipitation is 30%.
Friday Night
 
A chance of rain. Mostly cloudy, with a low around 37. Chance of precipitation is 40%.
Saturday
 
Rain likely. Mostly cloudy, with a high near 58. Chance of precipitation is 70%.
Saturday Night
 
Rain likely. Mostly cloudy, with a low around 37. Chance of precipitation is 70%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.