Waukesha County, WI: Current UV Index and Hourly Forecast

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As of 1:11 PM CDT on July 9, 2026, out of 27 cities in Waukesha County, WI in our database, 21 cities (78%) have a UV Index reading of Very High, while 6 cities (22%) have a UV Index reading of High. The city with the highest UV Index reading right now is Brookfield, WI with a reading of 8.7.

Over the next 24 hours, the highest UV Index reading in Waukesha County, WI is expected to be 8.7 in Brookfield between 1:00 PM - 2:00 PM CDT today.

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Current UV Index in Cities in Waukesha County, WI

• Big Bend - 8
• Brookfield - 8.7
• Butler - 8.7
• Chenequa - 7.5
• Delafield - 7.5
• Dousman - 7.5
• Eagle - 7.5
• Elm Grove - 8.7
• Hartland - 8
• Lac La Belle - 7.2
• Lannon - 7.3
• Menomonee Falls - 7.8
• Merton - 7.3
• Mukwonago - 8.1
• Muskego - 8
• Nashotah - 7.5
• New Berlin - 8
• North Lake - 7.3
• North Prairie - 7.5
• Oconomowoc - 7.5
• Oconomowoc Lake - 7.5
• Okauchee Lake - 7.2
• Sussex - 7.3
• Vernon - 8
• Village of Waukesha - 8
• Wales - 8
• Waukesha - 8