National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Wed, May-20-2026 2:36am CDT
Cottage Grove
 
  Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Thursday

Thursday: Partly Sunny
Partly Sunny
Friday

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

Saturday: Rain Showers Likely
Rain Showers Likely
Sunday

Sunday: Partly Sunny
Partly Sunny
Memorial
Day
Memorial Day: Mostly Sunny
Mostly Sunny
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
  Hi 62 °F Hi 60 °F Hi 63 °F Hi 69 °F Hi 76 °F Hi 81 °F Hi 83 °F
 
Overnight

Overnight: Partly Cloudy
Partly Cloudy
Wednesday
Night
Wednesday Night: Partly Cloudy
Partly Cloudy
Thursday
Night
Thursday Night: Mostly Cloudy
Mostly Cloudy
Friday
Night
Friday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Saturday
Night
Saturday Night: Mostly Cloudy
Mostly Cloudy
Sunday
Night
Sunday Night: Partly Cloudy
Partly Cloudy
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
 
Lo 44 °F Lo 40 °F Lo 44 °F Lo 48 °F Lo 51 °F Lo 52 °F Lo 56 °F  

 

Overnight
 
Partly cloudy, with a low around 44. Northwest wind around 5 mph.
Wednesday
 
Mostly sunny, with a high near 62. North wind 5 to 10 mph.
Wednesday Night
 
Partly cloudy, with a low around 40. East wind 5 to 10 mph.
Thursday
 
Partly sunny, with a high near 60. East wind around 10 mph.
Thursday Night
 
Mostly cloudy, with a low around 44. East wind 5 to 10 mph.
Friday
 
A chance of rain showers after 1pm. Mostly cloudy, with a high near 63. East wind 10 to 15 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Friday Night
 
Rain showers likely before 10pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 48. East wind 5 to 15 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Saturday
 
Rain showers likely before 1pm. Mostly cloudy, with a high near 69. Northeast wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
Saturday Night
 
Mostly cloudy, with a low around 51.
Sunday
 
Partly sunny, with a high near 76.
Sunday Night
 
Partly cloudy, with a low around 52.
Memorial Day
 
Mostly sunny, with a high near 81.
Monday Night
 
Partly cloudy, with a low around 56.
Tuesday
 
Mostly sunny, with a high near 83.

 

Forecast from NOAA-NWS for Cottage Grove, WI.