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Hourly Forecast
Daylight Hours
06:38
Sunrise
18:57
Sunset
Moon
Waxing Crescent
10:30
Moonrise
19:57
Moonset
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Weather in Waukesha tomorrow, September 15, 2026
Waukesha stays under cloudy skies on September 15, 2026, with only brief brighter breaks. Plan for a day that feels grey more often than open. The morning sky stays heavily clouded, with cover near 100% around 01:00. Grey conditions set the early tone before any later change.
Temperatures climb from an overnight low near 14°C toward a daytime high of about 22°C. Relative humidity sits between 21% and 97%, reaching its peak around 08:00. Airflow remains manageable, reaching about 7.5 km/h around 01:00.
Through the afternoon cloud remains the main feature, with cover near 100% around 12:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 13.8 km, briefly nearer 1.0 km. Expect sunrise at 06:39, sunset at 18:55, and 12 hours 16 minutes of sunlight today overall.
Overall, Waukesha on September 15, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 22°C.
Frequently asked questions about weather in Waukesha
How warm does it get in Waukesha?
The warmest month in Waukesha is July, with average high temperatures of 28°C. The average temperature during this period is around 23°C.
How cold does it get in Waukesha?
The coldest month in Waukesha is January, with average low temperatures of -8°C. The average temperature during this period is around -5°C.
What is the wettest time of year in Waukesha?
The wettest month in Waukesha is May, with an average of 104mm of precipitation.
What is the driest time of year in Waukesha?
The driest month in Waukesha is February, with an average of 43mm of precipitation.
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