| National Weather Service Forecast for:
Cottage Grove, WI Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI |
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| Updated: Fri, Aug-21-2026 3:32am CDT | ||||||||||||||||||||||||||||||||||||||||
| Cottage Grove | ||||||||||||||||||||||||||||||||||||||||
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| Overnight |
A slight chance of rain showers after 5am. Mostly cloudy, with a low around 62. 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 rain showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 78. Southwest wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible. |
| Friday Night |
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 8pm, then a slight chance of showers and thunderstorms between 8pm and 10pm. Partly cloudy, with a low around 60. West wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible. |
| Saturday |
Mostly sunny, with a high near 78. Northwest wind 5 to 15 mph. |
| Saturday Night |
Mostly clear, with a low around 55. North wind 5 to 10 mph. |
| Sunday |
Sunny, with a high near 76. Northwest wind around 5 mph. |
| Sunday Night |
Partly cloudy, with a low around 54. Northwest wind 0 to 5 mph. |
| Monday |
Mostly sunny, with a high near 77. Southeast wind around 0 mph. |
| Monday Night |
Partly cloudy, with a low around 57. |
| Tuesday |
Mostly sunny, with a high near 79. |
| Tuesday Night |
A chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 62. Chance of precipitation is 40%. |
| 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 40%. |
| Wednesday Night |
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 60. Chance of precipitation is 20%. |
| Thursday |
Mostly sunny, with a high near 80. |
Forecast from NOAA-NWS for Cottage Grove, WI.