As of 5:02 PM MST on December 20, 2025, all 461 cities in Arizona in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Yuma, AZ with a reading of 0.2.
Over the next 24 hours, the highest UV Index reading in Arizona is expected to be 4.3 in Sierra Vista 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 |