Cottage Grove, WI Weather

77°F

Cottage Grove, WI

Updated: Aug-19-2026 2:04pm

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

Updated: Wed, Aug-19-2026 1:21pm CDT

Cottage Grove

This Afternoon Mostly Sunny	Thursday Patchy Fog then Sunny	Friday Showers And T-Storms Likely	Saturday Sunny	Sunday Sunny	Monday Mostly Sunny	Tuesday Slight Chance Rain Showers then Mostly Sunny
Hi 78 °F	Hi 81 °F	Hi 80 °F	Hi 80 °F	Hi 77 °F	Hi 78 °F	Hi 81 °F

Tonight Partly Cloudy then Patchy Fog	Thursday Night Mostly Cloudy then Chance Showers And T-Storms	Friday Night Chance Showers And T-Storms then Mostly Clear	Saturday Night Mostly Clear	Sunday Night Partly Cloudy	Monday Night Partly Cloudy then Slight Chance Rain Showers	Tuesday Night Slight Chance Showers And T-Storms
Lo 55 °F	Lo 61 °F	Lo 60 °F	Lo 57 °F	Lo 55 °F	Lo 59 °F	Lo 62 °F

This Afternoon	Mostly sunny, with a high near 78. North wind around 5 mph.
Tonight	Patchy fog after 2am. Partly cloudy, with a low around 55. Northeast wind 0 to 5 mph.
Thursday	Patchy fog before 8am. Sunny, with a high near 81. Southwest wind 0 to 5 mph.
Thursday Night	A chance of rain showers between 3am and 4am, then a chance of showers and thunderstorms between 4am and 5am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 61. South wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Friday	Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 80. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Friday Night	A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 60. West wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Saturday	Sunny, with a high near 80. Northwest wind 5 to 10 mph.
Saturday Night	Mostly clear, with a low around 57. Northwest wind 5 to 10 mph.
Sunday	Sunny, with a high near 77.
Sunday Night	Partly cloudy, with a low around 55.
Monday	Mostly sunny, with a high near 78.
Monday Night	A slight chance of rain showers after 1am. Partly cloudy, with a low around 59. Chance of precipitation is 20%.
Tuesday	A slight chance of rain showers before 7am. Mostly sunny, with a high near 81. Chance of precipitation is 20%.
Tuesday Night	A slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 62. Chance of precipitation is 20%.

Forecast from NOAA-NWS for Cottage Grove, WI.