National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Wed, Mar-18-2026 1:07am CDT
Cottage Grove
 
  Wednesday

Wednesday: Chance Light Snow then Partly Sunny
Chance Light Snow then Partly Sunny
Thursday

Thursday: Chance Light Rain then Partly Sunny
Chance Light Rain then Partly Sunny
Friday

Friday: Mostly Cloudy
Mostly Cloudy
Saturday

Saturday: Mostly Sunny
Mostly Sunny
Sunday

Sunday: Slight Chance Light Rain then Partly Sunny
Slight Chance Light Rain then Partly Sunny
Monday

Monday: Partly Sunny
Partly Sunny
Tuesday

Tuesday: Partly Sunny
Partly Sunny
  Hi 39 °F Hi 44 °F Hi 55 °F Hi 65 °F Hi 56 °F Hi 42 °F Hi 48 °F
 
Overnight

Overnight: Light Snow
Light Snow
Wednesday
Night
Wednesday Night: Chance Rain And Snow
Chance Rain And Snow
Thursday
Night
Thursday Night: Mostly Cloudy
Mostly Cloudy
Friday
Night
Friday Night: Mostly Cloudy
Mostly Cloudy
Saturday
Night
Saturday Night: Mostly Cloudy then Slight Chance Light Rain
Mostly Cloudy then Slight Chance Light Rain
Sunday
Night
Sunday Night: Partly Cloudy
Partly Cloudy
Monday
Night
Monday Night: Mostly Cloudy
Mostly Cloudy
 
Lo 17 °F Lo 32 °F Lo 34 °F Lo 38 °F Lo 41 °F Lo 25 °F Lo 26 °F  

 

Overnight
 
Snow. Cloudy, with a low around 17. South wind around 10 mph. Chance of precipitation is 90%. New snow accumulation of less than half an inch possible.
Wednesday
 
A chance of snow and a chance of freezing drizzle before 7am. Partly sunny, with a high near 39. Southwest wind 5 to 10 mph. Chance of precipitation is 30%. New snow accumulation of less than half an inch possible.
Wednesday Night
 
A slight chance of rain between 10pm and 11pm, then a chance of rain and snow. Mostly cloudy, with a low around 32. Southwest wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Thursday
 
A chance of rain before 7am. Partly sunny, with a high near 44. Northeast wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Thursday Night
 
Mostly cloudy, with a low around 34. Southeast wind 0 to 5 mph.
Friday
 
Mostly cloudy, with a high near 55. West wind 5 to 10 mph.
Friday Night
 
Mostly cloudy, with a low around 38. Northwest wind around 5 mph.
Saturday
 
Mostly sunny, with a high near 65. Southwest wind 5 to 10 mph.
Saturday Night
 
A slight chance of rain after 1am. Mostly cloudy, with a low around 41. Chance of precipitation is 20%.
Sunday
 
A slight chance of rain before 7am. Partly sunny, with a high near 56. Chance of precipitation is 20%.
Sunday Night
 
Partly cloudy, with a low around 25.
Monday
 
Partly sunny, with a high near 42.
Monday Night
 
Mostly cloudy, with a low around 26.
Tuesday
 
Partly sunny, with a high near 48.

 

Forecast from NOAA-NWS for Cottage Grove, WI.