As of 2:07 PM MST on May 20, 2026, out of 461 cities in Arizona in our database, 344 cities (75%) have a UV Index reading of Very High, while 117 cities (25%) have a UV Index reading of High. The city with the highest UV Index reading right now is Douglas, AZ with a reading of 8.5.
Over the next 24 hours, the highest UV Index reading in Arizona is expected to be 10.2 in Alpine 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 |