As of 1:28 PM MST on August 17, 2026, out of 43 cities in Maricopa County, AZ in our database, 33 cities (77%) have a UV Index reading of Extreme, while 10 cities (23%) have a UV Index reading of Very High. The city with the highest UV Index reading right now is New River, AZ with a reading of 10.9.
Over the next 24 hours, the highest UV Index reading in Maricopa County, AZ is expected to be 11 in Kaka between 12:00 PM - 1:00 PM MST tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |