Cottage Grove, WI Weather

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Cottage Grove, WI

Updated: Aug-05-2026 8:43pm

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

Updated: Wed, Aug-05-2026 8:01pm CDT

Cottage Grove

	Thursday Areas Of Fog then Partly Sunny	Friday Mostly Sunny then Slight Chance Rain Showers	Saturday Sunny	Sunday Chance Showers And T-Storms then Slight Chance Showers And T-Storms	Monday Chance Showers And T-Storms then Showers And T-Storms Likely	Tuesday Chance Rain Showers	Wednesday Slight Chance Rain Showers then Slight Chance Showers And T-Storms
	Hi 79 °F	Hi 83 °F	Hi 81 °F	Hi 83 °F	Hi 81 °F	Hi 79 °F	Hi 78 °F

Tonight Slight Chance Rain Showers then Areas Of Fog	Thursday Night Partly Cloudy	Friday Night Chance Showers And T-Storms	Saturday Night Mostly Clear then Chance Showers And T-Storms	Sunday Night Chance Showers And T-Storms	Monday Night Chance Showers And T-Storms	Tuesday Night Partly Cloudy then Slight Chance Rain Showers
Lo 60 °F	Lo 60 °F	Lo 64 °F	Lo 63 °F	Lo 64 °F	Lo 63 °F	Lo 60 °F

Tonight	A slight chance of rain showers before 9pm, then areas of fog. Partly cloudy, with a low around 60. West wind around 0 mph. Chance of precipitation is 20%.
Thursday	Areas of fog before 9am. Partly sunny, with a high near 79. Northeast wind 0 to 5 mph.
Thursday Night	Partly cloudy, with a low around 60. South wind 0 to 5 mph.
Friday	A slight chance of rain showers after 1pm. Mostly sunny, with a high near 83. South wind 0 to 10 mph. Chance of precipitation is 20%.
Friday Night	A chance of rain showers before 10pm, then a chance of showers and thunderstorms between 10pm and 1am. Partly cloudy, with a low around 64. West wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Saturday	Sunny, with a high near 81. West wind around 5 mph.
Saturday Night	A chance of showers and thunderstorms after 1am. Mostly clear, with a low around 63. Southwest wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
Sunday	A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 83. Southwest wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
Sunday Night	A chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 50%.
Monday	A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely between 7am and 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Monday Night	A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
Tuesday	A chance of rain showers before 1pm. Partly sunny, with a high near 79. Chance of precipitation is 40%.
Tuesday Night	A slight chance of rain showers after 1am. Partly cloudy, with a low around 60. Chance of precipitation is 20%.
Wednesday	A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 78. Chance of precipitation is 20%.

Forecast from NOAA-NWS for Cottage Grove, WI.