As of 12:20 PM CDT on July 9, 2026, out of 27 cities in Waukesha County, WI in our database, 17 cities (63%) have a UV Index reading of Very High, while 10 cities (37%) have a UV Index reading of High. The city with the highest UV Index reading right now is Waukesha, WI with a reading of 8.5.
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.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |