| National Weather Service Forecast for:
Cottage Grove, WI Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI |
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| Updated: Wed, Aug-19-2026 12:31am CDT | ||||||||||||||||||||||||||||||||||||||||
| Cottage Grove | ||||||||||||||||||||||||||||||||||||||||
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| Overnight |
Patchy fog. Partly cloudy, with a low around 60. Northwest wind around 0 mph. |
| Wednesday |
Patchy fog before 8am. Mostly sunny, with a high near 78. North wind 0 to 5 mph. |
| Wednesday Night |
Partly cloudy, with a low around 56. Northeast wind 0 to 5 mph. |
| Thursday |
Sunny, with a high near 80. Southwest wind 0 to 5 mph. |
| Thursday Night |
A chance of rain showers between 1am and 4am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 61. South wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible. |
| Friday |
A chance of showers and thunderstorms before 1pm, 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 less than a tenth of an inch possible. |
| Friday Night |
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 61. West wind around 5 mph. Chance of precipitation is 40%. |
| Saturday |
Sunny, with a high near 78. Northwest wind 5 to 10 mph. |
| Saturday Night |
Mostly clear, with a low around 56. |
| Sunday |
Sunny, with a high near 77. |
| Sunday Night |
Partly cloudy, with a low around 56. |
| Monday |
A slight chance of rain showers after 7am. Mostly sunny, with a high near 78. Chance of precipitation is 20%. |
| Monday Night |
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 59. Chance of precipitation is 20%. |
| Tuesday |
Mostly sunny, with a high near 81. |
Forecast from NOAA-NWS for Cottage Grove, WI.