| National Weather Service Forecast for:
Waukesha WI Issued by: National Weather Service Milwaukee, WI |
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| Updated: 8:12 pm CST Dec 17, 2025 | ||||||||||||||||||
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| Tonight |
Rain likely, mainly after 5am. Mostly cloudy, with a temperature rising to around 39 by 5am. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible. |
| Thursday |
Rain before 2pm, then a chance of snow showers after 5pm. Temperature rising to near 42 by 9am, then falling to around 31 during the remainder of the day. Breezy, with a south wind 15 to 20 mph becoming west in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 100%. Little or no snow accumulation expected. |
| Thursday Night |
Snow showers likely, mainly before 9pm, then a slight chance of snow after midnight. Mostly cloudy, with a low around 8. Wind chill values between -10 and zero. Breezy, with a west wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible. |
| Friday |
Mostly sunny, with a high near 23. Wind chill values between -10 and zero. Breezy, with a west wind 15 to 20 mph becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 30 mph. |
| Friday Night |
Mostly cloudy, with a temperature rising to around 28 by 5am. South wind 5 to 10 mph. |
| Saturday |
A slight chance of rain and snow before noon, then a slight chance of snow. Mostly cloudy, with a high near 37. South wind 10 to 15 mph becoming west in the afternoon. Chance of precipitation is 20%. |
| Saturday Night |
Mostly clear, with a low around 9. West wind 10 to 15 mph. |
| Sunday |
Sunny, with a high near 22. West wind 5 to 10 mph. |
| Sunday Night |
Partly cloudy, with a steady temperature around 17. |
| Monday |
Mostly cloudy, with a high near 35. |
| Monday Night |
Mostly cloudy, with a low around 29. |
| Tuesday |
Partly sunny, with a high near 40. |
| Tuesday Night |
Mostly cloudy, with a low around 24. |
| Wednesday |
Mostly cloudy, with a high near 36. |
Forecast from NOAA-NWS for Waukesha WI.