As of 3:57 PM MDT on July 12, 2026, out of 14 cities in San Juan County, UT in our database, 13 cities (93%) have a UV Index reading of Very High, while 1 city (7%) have a UV Index reading of High. The city with the highest UV Index reading right now is Oljato-Monument Valley, UT with a reading of 10.1.
Over the next 24 hours, the highest UV Index reading in San Juan County, UT is expected to be 12.2 in Navajo Mountain between 1:00 PM - 2:00 PM MDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |