As of 1:54 PM MST on January 18, 2026, out of 461 cities in Arizona in our database, 458 cities (99%) have a UV Index reading of Moderate, while 3 cities (1%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Nogales, AZ with a reading of 4.
Over the next 24 hours, the highest UV Index reading in Arizona is expected to be 4 in Nogales between 1:00 PM - 2:00 PM MST today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |