| National Weather Service Forecast for:
Cottage Grove, WI Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI |
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| Updated: Wed, Sep-02-2026 2:47am CDT | ||||||||||||||||||||||||||||||||||||||||
| Cottage Grove | ||||||||||||||||||||||||||||||||||||||||
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| Overnight |
A slight chance of showers and thunderstorms between 4am and 5am. Partly cloudy, with a low around 71. East wind around 0 mph. Chance of precipitation is 20%. |
| Wednesday |
A slight chance of rain showers between noon and 3pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 90. Heat index values as high as 96. Southwest wind 0 to 10 mph. Chance of precipitation is 20%. |
| Wednesday Night |
A chance of showers and thunderstorms after 8pm. Mostly clear, with a low around 70. Southeast wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible. |
| Thursday |
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and noon, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 86. Southeast wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible. |
| Thursday Night |
A slight chance of showers and thunderstorms before 1am, then showers and thunderstorms likely. Partly cloudy, with a low around 69. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible. |
| Friday |
Showers and thunderstorms likely before 1pm. Partly sunny, with a high near 87. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible. |
| Friday Night |
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 67. Southeast wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible. |
| Saturday |
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 85. East wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible. |
| Saturday Night |
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 20%. |
| Sunday |
A slight chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 20%. |
| Sunday Night |
A slight chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 30%. |
| Labor Day |
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 30%. |
| Monday Night |
A slight chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 30%. |
| Tuesday |
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 30%. |
Forecast from NOAA-NWS for Cottage Grove, WI.