As of 2:58 PM PST on January 13, 2026, all 14 cities in Trinity County, CA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Ruth, CA with a reading of 1.6.
Over the next 24 hours, the highest UV Index reading in Trinity County, CA is expected to be 2.4 in Ruth between 12:00 PM - 1:00 PM PST tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |