National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI
Updated: Mon, Sep-21-2026 8:36am CDT
Cottage Grove
 
Today

Today: Cloudy
Cloudy
Tuesday

Tuesday: Partly Sunny
Partly Sunny
Wednesday

Wednesday: Sunny
Sunny
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Friday

Friday: Mostly Sunny
Mostly Sunny
Saturday

Saturday: Partly Sunny
Partly Sunny
Sunday

Sunday: Slight Chance Rain Showers
Slight Chance Rain Showers
 
Hi 62 °F Hi 62 °F Hi 65 °F Hi 65 °F Hi 67 °F Hi 66 °F Hi 69 °F  
 
Tonight

Tonight: Scattered Rain Showers
Scattered Rain Showers
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Saturday
Night
Saturday Night: Mostly Cloudy then Slight Chance Rain Showers
Mostly Cloudy then Slight Chance Rain Showers
Sunday
Night
Sunday Night: Partly Cloudy then Slight Chance Rain Showers
Partly Cloudy then Slight Chance Rain Showers
 
Lo 48 °F Lo 45 °F Lo 46 °F Lo 47 °F Lo 47 °F Lo 50 °F Lo 53 °F  

 

Today
 
Cloudy, with a high near 62. Northeast wind around 15 mph.
Tonight
 
Scattered rain showers between 7pm and 5am. Mostly cloudy, with a low around 48. Northeast wind 5 to 10 mph.
Tuesday
 
Partly sunny, with a high near 62. Northeast wind 5 to 15 mph.
Tuesday Night
 
Mostly clear, with a low around 45. Northeast wind 5 to 10 mph.
Wednesday
 
Sunny, with a high near 65. Northeast wind 5 to 10 mph.
Wednesday Night
 
Mostly clear, with a low around 46. Northeast wind 0 to 5 mph.
Thursday
 
Mostly sunny, with a high near 65. East wind 0 to 5 mph.
Thursday Night
 
Partly cloudy, with a low around 47. Northeast wind 0 to 5 mph.
Friday
 
Mostly sunny, with a high near 67.
Friday Night
 
Partly cloudy, with a low around 47.
Saturday
 
Partly sunny, with a high near 66.
Saturday Night
 
A slight chance of rain showers after 1am. Mostly cloudy, with a low around 50. Chance of precipitation is 20%.
Sunday
 
A slight chance of rain showers before 1pm. Partly sunny, with a high near 69. Chance of precipitation is 20%.
Sunday Night
 
A slight chance of rain showers after 1am. Partly cloudy, with a low around 53. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Cottage Grove, WI.