National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Wed, May-20-2026 2:36pm CDT
Cottage Grove
 
This
Afternoon
This Afternoon: Mostly Sunny
Mostly Sunny
Thursday

Thursday: Chance Rain Showers
Chance Rain Showers
Friday

Friday: Partly Sunny then Slight Chance Rain Showers
Partly Sunny then Slight Chance Rain Showers
Saturday

Saturday: Rain Showers Likely then Partly Sunny
Rain Showers Likely then Partly Sunny
Sunday

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

Tuesday: Mostly Sunny then Slight Chance Rain Showers
Mostly Sunny then Slight Chance Rain Showers
 
Hi 62 °F Hi 60 °F Hi 63 °F Hi 70 °F Hi 76 °F Hi 81 °F Hi 83 °F  
 
Tonight

Tonight: Mostly Cloudy
Mostly Cloudy
Thursday
Night
Thursday Night: Mostly Cloudy
Mostly Cloudy
Friday
Night
Friday Night: Rain Showers Likely
Rain Showers Likely
Saturday
Night
Saturday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Sunday
Night
Sunday Night: Partly Cloudy
Partly Cloudy
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
Tuesday
Night
Tuesday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
 
Lo 40 °F Lo 44 °F Lo 48 °F Lo 50 °F Lo 52 °F Lo 55 °F Lo 58 °F  

 

This Afternoon
 
Mostly sunny, with a high near 62. Northeast wind around 10 mph.
Tonight
 
Mostly cloudy, with a low around 40. East wind around 10 mph.
Thursday
 
A chance of rain showers between 10am and 5pm. 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 slight chance of rain showers after 1pm. Partly sunny, with a high near 63. East wind 10 to 15 mph. Chance of precipitation is 20%.
Friday Night
 
Rain showers 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 7am. Partly sunny, with a high near 70. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
Saturday Night
 
A slight chance of showers and thunderstorms between 7pm and 1am. Mostly cloudy, with a low around 50. South wind 0 to 5 mph. Chance of precipitation is 20%.
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 55.
Tuesday
 
A slight chance of rain showers after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
Tuesday Night
 
A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 58. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.