| National Weather Service Forecast for:
Cottage Grove, WI Issued by: National Weather Service Milwaukee/Sullivan/Dousman, WI |
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| Updated: Thu, Mar-19-2026 2:31am CDT | ||||||||||||||||||||||||||||||||||||||||
| Cottage Grove | ||||||||||||||||||||||||||||||||||||||||
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| Overnight |
A slight chance of freezing rain after 5am. Mostly cloudy, with a low around 29. South wind around 0 mph. Chance of precipitation is 20%. |
| Thursday |
Patchy fog between 8am and 11am. Partly sunny, with a high near 44. East wind 0 to 5 mph. |
| Thursday Night |
Mostly cloudy, with a low around 34. South wind 5 to 10 mph. |
| Friday |
Mostly cloudy, with a high near 55. West wind 5 to 10 mph. |
| Friday Night |
Mostly cloudy, with a low around 37. Northwest wind 0 to 5 mph. |
| Saturday |
Partly sunny, with a high near 64. Southwest wind 5 to 10 mph. |
| Saturday Night |
A slight chance of rain after 1am. Mostly cloudy, with a low around 41. South wind around 10 mph. Chance of precipitation is 20%. |
| Sunday |
A slight chance of rain before 1pm. Mostly cloudy, with a high near 46. North wind 10 to 15 mph. Chance of precipitation is 20%. |
| Sunday Night |
Mostly cloudy, with a low around 26. |
| Monday |
Sunny, with a high near 43. |
| Monday Night |
Mostly cloudy, with a low around 29. |
| Tuesday |
Partly sunny, with a high near 52. |
| Tuesday Night |
Mostly cloudy, with a low around 32. |
| Wednesday |
Mostly cloudy, with a high near 55. |
Forecast from NOAA-NWS for Cottage Grove, WI.