As of 1:59 PM MDT on June 22, 2026, all 14 cities in San Juan County, UT in our database have a UV Index reading of Extreme. The city with the highest UV Index reading right now is Oljato-Monument Valley, UT with a reading of 11.8.
Over the next 24 hours, the highest UV Index reading in San Juan County, UT is expected to be 11.8 in Oljato-Monument Valley between 1:00 PM - 2:00 PM MDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |