Cottage Grove, WI Weather

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Cottage Grove, WI

Updated: Aug-13-2026 4:08pm

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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 2:46pm CDT

Cottage Grove

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

Tonight Chance Light Rain	Friday Night Slight Chance Showers And T-Storms then Chance Showers And T-Storms	Saturday Night Chance Showers And T-Storms	Sunday Night Slight Chance Showers And T-Storms then Partly Cloudy	Monday Night Mostly Clear	Tuesday Night Chance Showers And T-Storms	Wednesday Night Chance Showers And T-Storms then Slight Chance Showers And T-Storms
Lo 63 °F	Lo 64 °F	Lo 68 °F	Lo 61 °F	Lo 60 °F	Lo 64 °F	Lo 59 °F

This Afternoon	Rain and a slight chance of thunderstorms. Cloudy. High near 78, with temperatures falling to around 73 in the afternoon. East wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts less than a tenth of an inch possible.
Tonight	A chance of rain. Mostly cloudy, with a low around 63. East wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Friday	A slight chance of rain before 9am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 81. East wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Friday Night	A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms between 1am and 2am, 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 half and three quarters of an inch possible.
Saturday	Showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 81. South wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Saturday Night	A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Southwest wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Sunday	A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Northwest wind 5 to 10 mph. Chance of precipitation is 20%.
Sunday Night	A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 61. North wind around 5 mph. Chance of precipitation is 20%.
Monday	Sunny, with a high near 78.
Monday Night	Mostly clear, with a low around 60.
Tuesday	Mostly sunny, with a high near 79.
Tuesday Night	A chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 64. Chance of precipitation is 50%.
Wednesday	A chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 50%.
Wednesday Night	A chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.

Forecast from NOAA-NWS for Cottage Grove, WI.