Cottage Grove, WI Weather

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Cottage Grove, WI

Updated: Aug-13-2026 3:36am

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

Updated: Thu, Aug-13-2026 2:47am CDT

Cottage Grove

	Thursday Chance Rain Showers	Friday Chance Rain Showers	Saturday Showers And T-Storms Likely	Sunday Chance Showers And T-Storms then Slight Chance Showers And T-Storms	Monday Sunny	Tuesday Mostly Sunny then Slight Chance Showers And T-Storms	Wednesday Chance Showers And T-Storms
	Hi 78 °F	Hi 79 °F	Hi 82 °F	Hi 81 °F	Hi 77 °F	Hi 79 °F	Hi 78 °F

Overnight Areas Of Fog	Thursday Night Chance Rain Showers 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 Showers And T-Storms then Partly Cloudy	Monday Night Mostly Clear	Tuesday Night Slight Chance Showers And T-Storms then Chance Showers And T-Storms
Lo 65 °F	Lo 63 °F	Lo 64 °F	Lo 68 °F	Lo 62 °F	Lo 59 °F	Lo 62 °F

Overnight	Areas of fog. Mostly cloudy, with a low around 65. East wind around 0 mph.
Thursday	Patchy fog before 9am, then a chance of rain showers. Mostly cloudy, with a high near 78. Southeast wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Thursday Night	A chance of rain showers before 8pm. Mostly cloudy, with a low around 63. East wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
Friday	A chance of rain showers after 7am. Mostly cloudy, with a high near 79. East wind 5 to 10 mph. Chance of precipitation is 30%.
Friday Night	A chance of rain showers before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 64. East wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday	Showers and thunderstorms likely before 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 82. 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. Mostly cloudy, with a low around 68. Southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday	A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Northwest wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Sunday Night	A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 62. Chance of precipitation is 20%.
Monday	Sunny, with a high near 77.
Monday Night	Mostly clear, with a low around 59.
Tuesday	A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79. Chance of precipitation is 20%.
Tuesday Night	A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 40%.
Wednesday	A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 78. Chance of precipitation is 40%.

Forecast from NOAA-NWS for Cottage Grove, WI.