National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Thu, May-21-2026 3:32pm CDT
Cottage Grove
 
This
Afternoon
This Afternoon: Slight Chance Rain Showers
Slight Chance Rain Showers
Friday

Friday: Partly Sunny
Partly Sunny
Saturday

Saturday: Slight Chance Rain Showers
Slight Chance Rain Showers
Sunday

Sunday: Chance Rain Showers then Partly Sunny
Chance Rain Showers then Partly Sunny
Memorial
Day
Memorial Day: Sunny then Slight Chance Showers And Thunderstorms
Sunny then Slight Chance Showers And T-Storms
Tuesday

Tuesday: Sunny
Sunny
Wednesday

Wednesday: Chance Rain Showers
Chance Rain Showers
 
Hi 58 °F Hi 64 °F Hi 69 °F Hi 77 °F Hi 83 °F Hi 85 °F Hi 84 °F  
 
Tonight

Tonight: Slight Chance Rain Showers then Mostly Cloudy
Slight Chance Rain Showers then Mostly Cloudy
Friday
Night
Friday Night: Mostly Cloudy then Slight Chance Rain Showers
Mostly Cloudy then Slight Chance Rain Showers
Saturday
Night
Saturday Night: Chance Rain Showers
Chance Rain Showers
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Monday
Night
Monday Night: Slight Chance Showers And Thunderstorms then Mostly Clear
Slight Chance Showers And T-Storms then Mostly Clear
Tuesday
Night
Tuesday Night: Slight Chance Showers And Thunderstorms
Slight Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Chance Showers And T-Storms then Slight Chance Showers And T-Storms
 
Lo 43 °F Lo 48 °F Lo 50 °F Lo 52 °F Lo 55 °F Lo 57 °F Lo 58 °F  

 

This Afternoon
 
A slight chance of rain showers. Mostly cloudy, with a high near 58. Northeast wind around 15 mph.
Tonight
 
A slight chance of rain showers before 9pm. Mostly cloudy, with a low around 43. East wind 10 to 15 mph.
Friday
 
Partly sunny, with a high near 64. East wind 10 to 15 mph.
Friday Night
 
A slight chance of rain showers after 1am. Mostly cloudy, with a low around 48. East wind 5 to 15 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Saturday
 
A slight chance of rain showers. Mostly cloudy, with a high near 69. Northeast wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Saturday Night
 
A chance of rain showers. Mostly cloudy, with a low around 50. Southeast wind 0 to 5 mph. Chance of precipitation is 30%.
Sunday
 
A chance of rain showers before 7am. Partly sunny, with a high near 77. Southwest wind 0 to 5 mph. Chance of precipitation is 30%.
Sunday Night
 
Mostly clear, with a low around 52. Southwest wind 0 to 5 mph.
Memorial Day
 
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 83. Chance of precipitation is 20%.
Monday Night
 
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 55. Chance of precipitation is 20%.
Tuesday
 
Sunny, with a high near 85.
Tuesday Night
 
A slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 57. Chance of precipitation is 20%.
Wednesday
 
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
Wednesday Night
 
A chance of showers and thunderstorms before 7pm, then a slight 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.