| National Weather Service Forecast for:
Waukesha WI Issued by: National Weather Service Milwaukee, WI |
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| Updated: 8:36 pm CDT Jun 18, 2026 | ||||||||||||||||||
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| Tonight |
Mostly clear, with a low around 53. West wind around 5 mph. |
| Juneteenth |
Sunny, with a high near 75. Northwest wind 5 to 10 mph. |
| Friday Night |
A 40 percent chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 54. West wind around 5 mph. |
| Saturday |
Mostly cloudy, then gradually becoming sunny, with a high near 76. West wind 5 to 10 mph. |
| Saturday Night |
Partly cloudy, with a low around 54. Northwest wind around 5 mph becoming calm in the evening. |
| Sunday |
A 50 percent chance of showers after 1pm. Mostly cloudy, with a high near 71. Light east wind increasing to 5 to 10 mph in the morning. |
| Sunday Night |
A 50 percent chance of showers. Mostly cloudy, with a low around 53. Northeast wind around 10 mph. |
| Monday |
Mostly sunny, with a high near 73. Northeast wind around 10 mph. |
| Monday Night |
Partly cloudy, with a low around 52. |
| Tuesday |
Mostly sunny, with a high near 75. |
| Tuesday Night |
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 54. |
| Wednesday |
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 74. |
| Wednesday Night |
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 54. |
| Thursday |
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 75. |
Forecast from NOAA-NWS for Waukesha WI.
