National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Thu, Mar-19-2026 1:26pm CDT
Cottage Grove
 
This
Afternoon
This Afternoon: Sunny
Sunny
Friday

Friday: Patchy Fog then Mostly Cloudy
Patchy Fog then Mostly Cloudy
Saturday

Saturday: Mostly Sunny
Mostly Sunny
Sunday

Sunday: Slight Chance Light Rain
Slight Chance Light Rain
Monday

Monday: Mostly Sunny
Mostly Sunny
Tuesday

Tuesday: Mostly Cloudy
Mostly Cloudy
Wednesday

Wednesday: Mostly Cloudy
Mostly Cloudy
 
Hi 51 °F Hi 53 °F Hi 66 °F Hi 52 °F Hi 46 °F Hi 53 °F Hi 52 °F  
 
Tonight

Tonight: Areas Of Fog
Areas Of Fog
Friday
Night
Friday Night: Areas Of Fog
Areas Of Fog
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
Sunday
Night
Sunday Night: Mostly Cloudy
Mostly Cloudy
Monday
Night
Monday Night: Mostly Cloudy
Mostly Cloudy
Tuesday
Night
Tuesday Night: Mostly Cloudy
Mostly Cloudy
Wednesday
Night
Wednesday Night: Mostly Cloudy then Slight Chance Light Rain
Mostly Cloudy then Slight Chance Light Rain
 
Lo 36 °F Lo 36 °F Lo 44 °F Lo 27 °F Lo 31 °F Lo 33 °F Lo 39 °F  

 

This Afternoon
 
Sunny, with a high near 51. East wind around 5 mph.
Tonight
 
Areas of fog between 9pm and 5am. Mostly cloudy, with a low around 36. South wind around 5 mph.
Friday
 
Patchy fog between 10am and 11am. Mostly cloudy, with a high near 53. Northwest wind 5 to 10 mph.
Friday Night
 
Areas of fog after 11pm. Mostly cloudy, with a low around 36. Northeast wind 0 to 5 mph.
Saturday
 
Mostly sunny, with a high near 66. South wind 5 to 10 mph.
Saturday Night
 
Partly cloudy, with a low around 44. South wind 5 to 10 mph.
Sunday
 
A slight chance of rain between 7am and 1pm. Mostly cloudy, with a high near 52. Northeast wind 10 to 15 mph. Chance of precipitation is 20%.
Sunday Night
 
Mostly cloudy, with a low around 27. North wind 5 to 15 mph.
Monday
 
Mostly sunny, with a high near 46.
Monday Night
 
Mostly cloudy, with a low around 31.
Tuesday
 
Mostly cloudy, with a high near 53.
Tuesday Night
 
Mostly cloudy, with a low around 33.
Wednesday
 
Mostly cloudy, with a high near 52.
Wednesday Night
 
A slight chance of rain after 1am. Mostly cloudy, with a low around 39. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.