Cottage Grove, WI Weather

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Cottage Grove, WI

Updated: Sep-07-2026 2:46am

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

Updated: Mon, Sep-07-2026 1:21am CDT

Cottage Grove

	Labor Day Areas Of Fog then Mostly Sunny	Tuesday Mostly Cloudy then Chance Rain Showers	Wednesday Showers And T-Storms then Slight Chance Showers And T-Storms	Thursday Sunny	Friday Sunny	Saturday Chance Showers And T-Storms then Mostly Sunny	Sunday Slight Chance Showers And T-Storms then Chance Showers And T-Storms
	Hi 80 °F	Hi 82 °F	Hi 82 °F	Hi 77 °F	Hi 80 °F	Hi 80 °F	Hi 74 °F

Overnight Mostly Cloudy	Monday Night Partly Cloudy	Tuesday Night Chance Showers And T-Storms	Wednesday Night Mostly Clear	Thursday Night Clear	Friday Night Slight Chance Showers And T-Storms	Saturday Night Partly Cloudy then Slight Chance Showers And T-Storms
Lo 56 °F	Lo 59 °F	Lo 68 °F	Lo 57 °F	Lo 55 °F	Lo 61 °F	Lo 58 °F

Overnight	Mostly cloudy, with a low around 56. East wind around 0 mph.
Labor Day	Areas of fog between 7am and 8am. Mostly sunny, with a high near 80. Southeast wind 0 to 10 mph.
Monday Night	Partly cloudy, with a low around 59. Southeast wind 5 to 10 mph.
Tuesday	A chance of rain showers after 1pm. Mostly cloudy, with a high near 82. South wind 5 to 10 mph. Chance of precipitation is 30%.
Tuesday Night	A chance of rain showers before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms. Mostly cloudy, with a low around 68. Southwest wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday	Showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Partly sunny, with a high near 82. West wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night	Mostly clear, with a low around 57. Northwest wind 5 to 10 mph.
Thursday	Sunny, with a high near 77. Northwest wind 5 to 10 mph.
Thursday Night	Clear, with a low around 55.
Friday	Sunny, with a high near 80.
Friday Night	A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 61. Chance of precipitation is 40%.
Saturday	A chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 80. Chance of precipitation is 40%.
Saturday Night	A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 58. Chance of precipitation is 20%.
Sunday	A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 74. Chance of precipitation is 40%.

Forecast from NOAA-NWS for Cottage Grove, WI.