As of 11:58 AM MDT on August 29, 2025, out of 14 cities in San Juan County, UT in our database, 7 cities (50%) have a UV Index reading of Low, 4 cities (29%) have a UV Index reading of High, while 3 cities (21%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Navajo Mountain, UT with a reading of 6.3.
Over the next 24 hours, the highest UV Index reading in San Juan County, UT is expected to be 10 in Navajo Mountain 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 |