As of 3:14 PM MST on May 27, 2026, all 54 cities in Pima County, AZ in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Arivaca, AZ with a reading of 6.5.
Over the next 24 hours, the highest UV Index reading in Pima County, AZ is expected to be 10 in Ajo 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 |