Cottage Grove, WI Weather

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Cottage Grove, WI

Updated: Jun-09-2026 4:57am

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

Updated: Tue, Jun-09-2026 4:34am CDT

Cottage Grove

	Tuesday Slight Chance Showers And T-Storms then Mostly Cloudy	Wednesday Slight Chance Showers And T-Storms then Chance Showers And T-Storms	Thursday Showers And T-Storms	Friday Sunny	Saturday Sunny	Sunday Slight Chance Rain Showers	Monday Chance Showers And T-Storms
	Hi 83 °F	Hi 89 °F	Hi 85 °F	Hi 79 °F	Hi 80 °F	Hi 74 °F	Hi 74 °F

Overnight Patchy Fog	Tuesday Night Partly Cloudy then Chance Showers And T-Storms	Wednesday Night Chance Showers And T-Storms then Showers And T-Storms	Thursday Night Showers And T-Storms then Chance Showers And T-Storms	Friday Night Mostly Clear	Saturday Night Chance Showers And T-Storms	Sunday Night Slight Chance Rain Showers
Lo 67 °F	Lo 66 °F	Lo 68 °F	Lo 58 °F	Lo 59 °F	Lo 56 °F	Lo 53 °F

Overnight	Patchy fog and a slight chance of rain showers. Mostly cloudy, with a low around 67. Southwest wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts between a tenth and quarter of an inch possible.
Tuesday	Patchy fog and a slight chance of rain showers before 8am, then a slight chance of showers and thunderstorms between 10am and noon. Mostly cloudy, with a high near 83. Northwest wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts between a tenth and quarter of an inch possible.
Tuesday Night	A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66. South wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Wednesday	A slight chance of showers and thunderstorms before noon, then a chance of showers and thunderstorms between noon and 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 89. Heat index values as high as 95. South wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Wednesday Night	A chance of showers and thunderstorms before 7pm, then showers and thunderstorms between 7pm and 1am. Mostly cloudy, with a low around 68. Southwest wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday	A chance of rain showers between 7am and 1pm, then showers and thunderstorms. Partly sunny. High near 85, with temperatures falling to around 80 in the afternoon. Southwest wind 5 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night	Showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 58. West wind 5 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Friday	Sunny, with a high near 79. West wind 10 to 15 mph.
Friday Night	Mostly clear, with a low around 59.
Saturday	Sunny, with a high near 80.
Saturday Night	A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 56. Chance of precipitation is 30%.
Sunday	A slight chance of rain showers. Mostly sunny, with a high near 74. Chance of precipitation is 20%.
Sunday Night	A slight chance of rain showers. Partly cloudy, with a low around 53. Chance of precipitation is 20%.
Monday	A slight chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 74. Chance of precipitation is 30%.

Forecast from NOAA-NWS for Cottage Grove, WI.