Cottage Grove, WI Weather

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Cottage Grove, WI

Updated: Aug-12-2026 1:35am

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

Updated: Wed, Aug-12-2026 1:21am CDT

Cottage Grove

	Wednesday Patchy Fog then Partly Sunny	Thursday Showers And T-Storms Likely	Friday Mostly Sunny	Saturday Showers And T-Storms Likely	Sunday Chance Showers And T-Storms	Monday Mostly Sunny	Tuesday Mostly Sunny then Slight Chance Rain Showers
	Hi 84 °F	Hi 80 °F	Hi 80 °F	Hi 81 °F	Hi 80 °F	Hi 78 °F	Hi 79 °F

Overnight Patchy Fog	Wednesday Night Partly Cloudy	Thursday Night Chance Showers And T-Storms then Mostly Cloudy	Friday Night Showers And T-Storms Likely	Saturday Night Chance Showers And T-Storms then Showers And T-Storms Likely	Sunday Night Slight Chance Rain Showers	Monday Night Partly Cloudy
Lo 65 °F	Lo 65 °F	Lo 63 °F	Lo 63 °F	Lo 67 °F	Lo 61 °F	Lo 59 °F

Overnight	Patchy fog after 3am. Mostly cloudy, with a low around 65. Southeast wind around 0 mph.
Wednesday	Patchy fog before 8am. Partly sunny, with a high near 84. East wind 0 to 5 mph. New rainfall amounts less than a tenth of an inch possible.
Wednesday Night	Partly cloudy, with a low around 65. Southeast wind around 0 mph. New rainfall amounts less than a tenth of an inch possible.
Thursday	A chance of rain showers between 7am and 10am, then showers and thunderstorms likely. Mostly cloudy, with a high near 80. Southeast wind 0 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Thursday Night	A chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 63. East wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Friday	Mostly sunny, with a high near 80. East wind 5 to 10 mph.
Friday Night	A slight chance of rain showers between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 63. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday	Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Southeast wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night	A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Sunday	A chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.
Sunday Night	A slight chance of rain showers between 7pm and 1am. Partly cloudy, with a low around 61. Chance of precipitation is 20%.
Monday	Mostly sunny, with a high near 78.
Monday Night	Partly cloudy, with a low around 59.
Tuesday	A slight chance of rain showers after 1pm. Mostly sunny, with a high near 79. Chance of precipitation is 20%.

Forecast from NOAA-NWS for Cottage Grove, WI.