Cottage Grove, WI Weather

57°F

Cottage Grove, WI

Updated: May-21-2026 5:01pm

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

Updated: Thu, May-21-2026 3:32pm CDT

Cottage Grove

This Afternoon Slight Chance Rain Showers	Friday Partly Sunny	Saturday Slight Chance Rain Showers	Sunday Chance Rain Showers then Partly Sunny	Memorial Day Sunny then Slight Chance Showers And T-Storms	Tuesday Sunny	Wednesday Chance Rain Showers
Hi 58 °F	Hi 64 °F	Hi 69 °F	Hi 77 °F	Hi 83 °F	Hi 85 °F	Hi 84 °F

Tonight Slight Chance Rain Showers then Mostly Cloudy	Friday Night Mostly Cloudy then Slight Chance Rain Showers	Saturday Night Chance Rain Showers	Sunday Night Mostly Clear	Monday Night Slight Chance Showers And T-Storms then Mostly Clear	Tuesday Night Slight Chance Showers And T-Storms	Wednesday Night Chance Showers And T-Storms then Slight Chance Showers And T-Storms
Lo 43 °F	Lo 48 °F	Lo 50 °F	Lo 52 °F	Lo 55 °F	Lo 57 °F	Lo 58 °F

This Afternoon	A slight chance of rain showers. Mostly cloudy, with a high near 58. Northeast wind around 15 mph.
Tonight	A slight chance of rain showers before 9pm. Mostly cloudy, with a low around 43. East wind 10 to 15 mph.
Friday	Partly sunny, with a high near 64. East wind 10 to 15 mph.
Friday Night	A slight chance of rain showers after 1am. Mostly cloudy, with a low around 48. East wind 5 to 15 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Saturday	A slight chance of rain showers. Mostly cloudy, with a high near 69. Northeast wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Saturday Night	A chance of rain showers. Mostly cloudy, with a low around 50. Southeast wind 0 to 5 mph. Chance of precipitation is 30%.
Sunday	A chance of rain showers before 7am. Partly sunny, with a high near 77. Southwest wind 0 to 5 mph. Chance of precipitation is 30%.
Sunday Night	Mostly clear, with a low around 52. Southwest wind 0 to 5 mph.
Memorial Day	A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 83. Chance of precipitation is 20%.
Monday Night	A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 55. Chance of precipitation is 20%.
Tuesday	Sunny, with a high near 85.
Tuesday Night	A slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 57. Chance of precipitation is 20%.
Wednesday	A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
Wednesday Night	A chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 58. Chance of precipitation is 30%.

Forecast from NOAA-NWS for Cottage Grove, WI.