Cottage Grove, WI Weather

42°F

Cottage Grove, WI

Updated: May-06-2026 12:11am

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

Updated: Tue, May-05-2026 8:37pm CDT

Cottage Grove

	Wednesday Widespread Frost then Partly Sunny	Thursday Areas Of Frost then Chance Rain Showers	Friday Partly Sunny then Chance Rain Showers	Saturday Mostly Sunny then Slight Chance Showers And T-Storms	Sunday Chance Rain Showers	Monday Sunny	Tuesday Slight Chance Rain Showers
	Hi 55 °F	Hi 59 °F	Hi 65 °F	Hi 71 °F	Hi 62 °F	Hi 64 °F	Hi 70 °F

Tonight Mostly Cloudy	Wednesday Night Partly Cloudy then Widespread Frost	Thursday Night Chance Rain Showers then Partly Cloudy	Friday Night Chance Rain Showers then Partly Cloudy	Saturday Night Chance Showers And T-Storms	Sunday Night Partly Cloudy	Monday Night Partly Cloudy
Lo 33 °F	Lo 34 °F	Lo 42 °F	Lo 44 °F	Lo 45 °F	Lo 40 °F	Lo 43 °F

Frost Advisory issued May 5 at 8:32PM CDT until May 6 at 8:00AM CDT

Tonight	Mostly cloudy, with a low around 33. Northwest wind 5 to 10 mph.
Wednesday	Widespread frost before 7am. Partly sunny, with a high near 55. Northwest wind 5 to 10 mph.
Wednesday Night	Widespread frost after 3am. Partly cloudy, with a low around 34. West wind 0 to 10 mph.
Thursday	Areas of frost before 7am, then a chance of rain showers. Mostly sunny, with a high near 59. West wind 5 to 15 mph. Chance of precipitation is 30%.
Thursday Night	A chance of rain showers before 7pm. Partly cloudy, with a low around 42. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
Friday	A chance of rain showers after 1pm. Partly sunny, with a high near 65. Southwest wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Friday Night	A chance of rain showers before 7pm. Partly cloudy, with a low around 44. West wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Saturday	A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 71. West wind 5 to 15 mph. Chance of precipitation is 20%.
Saturday Night	A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. Chance of precipitation is 40%.
Sunday	A chance of rain showers before 1pm. Partly sunny, with a high near 62. Chance of precipitation is 40%.
Sunday Night	Partly cloudy, with a low around 40.
Monday	Sunny, with a high near 64.
Monday Night	Partly cloudy, with a low around 43.
Tuesday	A slight chance of rain showers after 7am. Mostly sunny, with a high near 70. Chance of precipitation is 20%.

Forecast from NOAA-NWS for Cottage Grove, WI.