National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Thu, Mar-19-2026 2:31am CDT
Cottage Grove
 
  Thursday

Thursday: Patchy Fog then Partly Sunny
Patchy Fog then Partly Sunny
Friday

Friday: Mostly Cloudy
Mostly Cloudy
Saturday

Saturday: Partly Sunny
Partly Sunny
Sunday

Sunday: Slight Chance Light Rain
Slight Chance Light Rain
Monday

Monday: Sunny
Sunny
Tuesday

Tuesday: Partly Sunny
Partly Sunny
Wednesday

Wednesday: Mostly Cloudy
Mostly Cloudy
  Hi 44 °F Hi 55 °F Hi 64 °F Hi 46 °F Hi 43 °F Hi 52 °F Hi 55 °F
 
Overnight

Overnight: Slight Chance Freezing Rain
Slight Chance Freezing Rain
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: Mostly Cloudy
Mostly Cloudy
Monday
Night
Monday Night: Mostly Cloudy
Mostly Cloudy
Tuesday
Night
Tuesday Night: Mostly Cloudy
Mostly Cloudy
 
Lo 29 °F Lo 34 °F Lo 37 °F Lo 41 °F Lo 26 °F Lo 29 °F Lo 32 °F  

 

Overnight
 
A slight chance of freezing rain after 5am. Mostly cloudy, with a low around 29. South wind around 0 mph. Chance of precipitation is 20%.
Thursday
 
Patchy fog between 8am and 11am. Partly sunny, with a high near 44. East wind 0 to 5 mph.
Thursday Night
 
Mostly cloudy, with a low around 34. South wind 5 to 10 mph.
Friday
 
Mostly cloudy, with a high near 55. West wind 5 to 10 mph.
Friday Night
 
Mostly cloudy, with a low around 37. Northwest wind 0 to 5 mph.
Saturday
 
Partly sunny, with a high near 64. Southwest wind 5 to 10 mph.
Saturday Night
 
A slight chance of rain after 1am. Mostly cloudy, with a low around 41. South wind around 10 mph. Chance of precipitation is 20%.
Sunday
 
A slight chance of rain before 1pm. Mostly cloudy, with a high near 46. North wind 10 to 15 mph. Chance of precipitation is 20%.
Sunday Night
 
Mostly cloudy, with a low around 26.
Monday
 
Sunny, with a high near 43.
Monday Night
 
Mostly cloudy, with a low around 29.
Tuesday
 
Partly sunny, with a high near 52.
Tuesday Night
 
Mostly cloudy, with a low around 32.
Wednesday
 
Mostly cloudy, with a high near 55.

 

Forecast from NOAA-NWS for Cottage Grove, WI.