Cottage Grove, WI Weather

77°F

Cottage Grove, WI

Updated: Aug-07-2026 7:20pm

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

Updated: Fri, Aug-07-2026 2:47pm CDT

Cottage Grove

	Saturday Patchy Fog then Sunny	Sunday Showers And T-Storms Likely	Monday Showers And T-Storms Likely	Tuesday Chance Showers And T-Storms	Wednesday Chance Showers And T-Storms	Thursday Mostly Sunny	Friday Mostly Sunny then Chance Rain Showers
	Hi 81 °F	Hi 81 °F	Hi 83 °F	Hi 80 °F	Hi 79 °F	Hi 76 °F	Hi 75 °F

Tonight Mostly Cloudy then Slight Chance Showers And T-Storms	Saturday Night Mostly Clear then Slight Chance Rain Showers	Sunday Night Chance Showers And T-Storms	Monday Night Showers And T-Storms Likely	Tuesday Night Chance Showers And T-Storms	Wednesday Night Chance Showers And T-Storms then Partly Cloudy	Thursday Night Partly Cloudy
Lo 64 °F	Lo 62 °F	Lo 66 °F	Lo 64 °F	Lo 61 °F	Lo 58 °F	Lo 56 °F

Tonight	A slight chance of showers and thunderstorms between midnight and 2am. Mostly cloudy, with a low around 64. West wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday	Patchy fog before 8am. Sunny, with a high near 81. Northwest wind 5 to 10 mph.
Saturday Night	A slight chance of rain showers after 4am. Mostly clear, with a low around 62. Southwest wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Sunday	A slight chance of rain showers before 7am, then showers and thunderstorms likely between 7am and 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 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night	A chance of showers and thunderstorms before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 66. Southwest wind 0 to 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Monday	Showers and thunderstorms likely. Partly sunny, with a high near 83. Southwest wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night	Showers and thunderstorms likely before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 64. East wind 0 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday	Rain showers likely before 7am, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Southeast wind 0 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night	A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Wednesday	A chance of rain showers before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 30%.
Wednesday Night	A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 58. Chance of precipitation is 30%.
Thursday	Mostly sunny, with a high near 76.
Thursday Night	Partly cloudy, with a low around 56.
Friday	A chance of rain showers after 1pm. Mostly sunny, with a high near 75. Chance of precipitation is 30%.

Forecast from NOAA-NWS for Cottage Grove, WI.