National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Fri, Sep-18-2026 9:52pm CDT
Cottage Grove
 
  Saturday

Saturday: Showers And Thunderstorms
Showers And T-Storms
Sunday

Sunday: Chance Rain Showers
Chance Rain Showers
Monday

Monday: Chance Rain Showers
Chance Rain Showers
Tuesday

Tuesday: Slight Chance Rain Showers then Partly Sunny
Slight Chance Rain Showers then Partly Sunny
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Friday

Friday: Mostly Sunny
Mostly Sunny
  Hi 70 °F Hi 66 °F Hi 63 °F Hi 62 °F Hi 65 °F Hi 69 °F Hi 70 °F
 
Tonight

Tonight: Chance Showers And Thunderstorms then Showers And Thunderstorms
Chance Showers And T-Storms then Showers And T-Storms
Saturday
Night
Saturday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Sunday
Night
Sunday Night: Mostly Cloudy
Mostly Cloudy
Monday
Night
Monday Night: Chance Rain Showers
Chance Rain Showers
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Wednesday
Night
Wednesday Night: Partly Cloudy
Partly Cloudy
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
 
Lo 59 °F Lo 58 °F Lo 51 °F Lo 47 °F Lo 46 °F Lo 48 °F Lo 49 °F  

Flood Watch issued September 18 at 9:49PM CDT until September 19 at 7:00PM CDT
Flood Watch issued September 18 at 6:11PM CDT until September 19 at 1:00PM CDT
 

Tonight
 
A chance of showers and thunderstorms before 11pm, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 59. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Saturday
 
Showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 70. Southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
Saturday Night
 
Showers and thunderstorms likely. Cloudy, with a low around 58. Northeast wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 inches possible.
Sunday
 
A chance of rain showers before 1pm. Mostly cloudy, with a high near 66. Northeast wind around 15 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
Sunday Night
 
Mostly cloudy, with a low around 51. Northeast wind 10 to 15 mph. New rainfall amounts less than a tenth of an inch possible.
Monday
 
A chance of rain showers after 7am. Mostly cloudy, with a high near 63. Northeast wind around 15 mph. Chance of precipitation is 30%.
Monday Night
 
A chance of rain showers. Mostly cloudy, with a low around 47. Northeast wind 10 to 15 mph. Chance of precipitation is 30%.
Tuesday
 
A slight chance of rain showers before 7am. Partly sunny, with a high near 62. Northeast wind 10 to 15 mph. Chance of precipitation is 20%.
Tuesday Night
 
Partly cloudy, with a low around 46.
Wednesday
 
Mostly sunny, with a high near 65.
Wednesday Night
 
Partly cloudy, with a low around 48.
Thursday
 
Mostly sunny, with a high near 69.
Thursday Night
 
Partly cloudy, with a low around 49.
Friday
 
Mostly sunny, with a high near 70.

 

Forecast from NOAA-NWS for Cottage Grove, WI.