| National Weather Service Forecast for:
Cottage Grove, WI Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI |
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| Updated: Thu, Aug-20-2026 1:21am CDT | ||||||||||||||||||||||||||||||||||||||||
| Cottage Grove | ||||||||||||||||||||||||||||||||||||||||
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| Overnight |
Patchy fog. Mostly clear, with a low around 55. Southwest wind around 0 mph. |
| Thursday |
Patchy fog before 8am. Sunny, with a high near 80. South wind 0 to 5 mph. |
| Thursday Night |
A slight chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 61. South wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible. |
| Friday |
A chance of showers and thunderstorms before 10am, then a chance of showers and thunderstorms. Partly sunny, with a high near 79. Southwest wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible. |
| Friday Night |
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 60. West wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible. |
| Saturday |
Sunny, with a high near 79. Northwest wind 5 to 10 mph. |
| Saturday Night |
Mostly clear, with a low around 55. North wind 5 to 10 mph. |
| Sunday |
Sunny, with a high near 77. Northwest wind around 5 mph. |
| Sunday Night |
Partly cloudy, with a low around 55. |
| Monday |
Mostly sunny, with a high near 77. |
| Monday Night |
Partly cloudy, with a low around 58. |
| Tuesday |
A slight chance of rain showers after 1pm. Mostly sunny, with a high near 80. Chance of precipitation is 20%. |
| Tuesday Night |
A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 30%. |
| Wednesday |
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 81. Chance of precipitation is 30%. |
Forecast from NOAA-NWS for Cottage Grove, WI.