National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Sun, May-10-2026 6:51pm CDT
Cottage Grove
 
  Monday

Monday: Widespread Frost then Sunny
Widespread Frost then Sunny
Tuesday

Tuesday: Showers And Thunderstorms
Showers And T-Storms
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Thursday

Thursday: Sunny
Sunny
Friday

Friday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Saturday

Saturday: Chance Rain Showers
Chance Rain Showers
Sunday

Sunday: Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
Slight Chance Rain Showers then Slight Chance Showers And T-Storms
  Hi 61 °F Hi 75 °F Hi 63 °F Hi 70 °F Hi 75 °F Hi 77 °F Hi 77 °F
 
Tonight

Tonight: Partly Cloudy then Widespread Frost
Partly Cloudy then Widespread Frost
Monday
Night
Monday Night: Partly Cloudy then Chance Showers And Thunderstorms
Partly Cloudy then Chance Showers And T-Storms
Tuesday
Night
Tuesday Night: Chance Showers And Thunderstorms then Mostly Clear
Chance Showers And T-Storms then Mostly Clear
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Friday
Night
Friday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
 
Lo 33 °F Lo 40 °F Lo 47 °F Lo 40 °F Lo 50 °F Lo 52 °F Lo 53 °F  

Frost Advisory issued May 10 at 6:48PM CDT until May 11 at 8:00AM CDT
Frost Advisory issued May 10 at 11:59AM CDT until May 11 at 8:00AM CDT
 

Tonight
 
Widespread frost after 3am. Partly cloudy, with a low around 33. North wind around 5 mph.
Monday
 
Widespread frost before 8am. Sunny, with a high near 61. Northeast wind around 5 mph.
Monday Night
 
A chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 40. Southeast wind 5 to 10 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Tuesday
 
Showers and thunderstorms. Partly sunny, with a high near 75. Southwest wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Tuesday Night
 
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 47. West wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Wednesday
 
Mostly sunny, with a high near 63. Northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
 
Mostly clear, with a low around 40. North wind 0 to 15 mph.
Thursday
 
Sunny, with a high near 70. Southwest wind 0 to 5 mph.
Thursday Night
 
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 50. Chance of precipitation is 40%.
Friday
 
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 75. Chance of precipitation is 40%.
Friday Night
 
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 52. Chance of precipitation is 30%.
Saturday
 
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 77. Chance of precipitation is 30%.
Saturday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 53. Chance of precipitation is 30%.
Sunday
 
A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 77. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.