Cottage Grove, WI Weather

63°F

Cottage Grove, WI

Updated: Aug-18-2026 10:16pm

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National Weather Service Forecast for: Cottage Grove, WI
Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI

Updated: Tue, Aug-18-2026 9:12pm CDT

Cottage Grove

	Wednesday Patchy Fog then Mostly Sunny	Thursday Sunny	Friday Showers And T-Storms Likely	Saturday Sunny	Sunday Sunny	Monday Slight Chance Rain Showers	Tuesday Mostly Sunny
	Hi 78 °F	Hi 80 °F	Hi 80 °F	Hi 78 °F	Hi 77 °F	Hi 78 °F	Hi 81 °F

Tonight Slight Chance Rain Showers then Patchy Fog	Wednesday Night Mostly Clear	Thursday Night Partly Cloudy then Chance Showers And T-Storms	Friday Night Showers And T-Storms Likely then Slight Chance Showers And T-Storms	Saturday Night Mostly Clear	Sunday Night Partly Cloudy	Monday Night Slight Chance Rain Showers then Partly Cloudy
Lo 60 °F	Lo 56 °F	Lo 61 °F	Lo 61 °F	Lo 56 °F	Lo 56 °F	Lo 59 °F

Tonight	A slight chance of rain showers before 11pm, then patchy fog. Mostly cloudy, with a low around 60. West wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Wednesday	Patchy fog before 8am. Mostly sunny, with a high near 78. North wind 0 to 5 mph.
Wednesday Night	Mostly clear, with a low around 56. North wind 0 to 5 mph.
Thursday	Sunny, with a high near 80. Southwest wind 0 to 5 mph.
Thursday Night	A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61. Southwest wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Friday	Showers and thunderstorms likely. Partly sunny, with a high near 80. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Friday Night	Showers and thunderstorms likely before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 61. West wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Saturday	Sunny, with a high near 78. Northwest wind 5 to 10 mph.
Saturday Night	Mostly clear, with a low around 56.
Sunday	Sunny, with a high near 77.
Sunday Night	Partly cloudy, with a low around 56.
Monday	A slight chance of rain showers after 7am. Mostly sunny, with a high near 78. Chance of precipitation is 20%.
Monday Night	A slight chance of rain showers before 7pm. Partly cloudy, with a low around 59. Chance of precipitation is 20%.
Tuesday	Mostly sunny, with a high near 81.

Forecast from NOAA-NWS for Cottage Grove, WI.