National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Mon, Aug-17-2026 5:32am CDT
Cottage Grove
 
Today

Today: Patchy Fog then Mostly Sunny
Patchy Fog then Mostly Sunny
Tuesday

Tuesday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Friday

Friday: Chance Rain Showers
Chance Rain Showers
Saturday

Saturday: Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
Slight Chance Rain Showers then Slight Chance Showers And T-Storms
Sunday

Sunday: Sunny
Sunny
 
Hi 80 °F Hi 80 °F Hi 77 °F Hi 78 °F Hi 78 °F Hi 78 °F Hi 76 °F  
 
Tonight

Tonight: Partly Cloudy
Partly Cloudy
Tuesday
Night
Tuesday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Mostly Clear then Slight Chance Rain Showers
Mostly Clear then Slight Chance Rain Showers
Friday
Night
Friday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Saturday
Night
Saturday Night: Slight Chance Showers And Thunderstorms then Mostly Clear
Slight Chance Showers And T-Storms then Mostly Clear
Sunday
Night
Sunday Night: Partly Cloudy
Partly Cloudy
 
Lo 62 °F Lo 60 °F Lo 56 °F Lo 58 °F Lo 61 °F Lo 58 °F Lo 57 °F  

 

Today
 
Patchy fog before 7am. Mostly sunny, with a high near 80. Northwest wind around 5 mph.
Tonight
 
Partly cloudy, with a low around 62. West wind around 5 mph.
Tuesday
 
A slight chance of showers and thunderstorms between noon and 1pm, then showers and thunderstorms likely. Mostly sunny, with a high near 80. West wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Tuesday Night
 
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms between 7pm and 10pm, then a chance of showers and thunderstorms between 10pm and 1am. Partly cloudy, with a low around 60. Northwest wind 0 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Wednesday
 
Mostly sunny, with a high near 77. North wind 0 to 5 mph.
Wednesday Night
 
Mostly clear, with a low around 56. Northwest wind around 0 mph.
Thursday
 
Mostly sunny, with a high near 78. East wind around 0 mph.
Thursday Night
 
A slight chance of rain showers after 1am. Mostly clear, with a low around 58. South wind around 0 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Friday
 
A chance of rain showers. Mostly sunny, with a high near 78. Chance of precipitation is 30%.
Friday Night
 
A chance of rain showers before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 61. Chance of precipitation is 50%.
Saturday
 
A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 78. Chance of precipitation is 20%.
Saturday Night
 
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 58. Chance of precipitation is 20%.
Sunday
 
Sunny, with a high near 76.
Sunday Night
 
Partly cloudy, with a low around 57.

 

Forecast from NOAA-NWS for Cottage Grove, WI.