As of 2:47 PM PDT on October 1, 2025, out of 14 cities in Trinity County, CA in our database, 7 cities (50%) have a UV Index reading of Moderate, while 7 cities (50%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Mad River, CA with a reading of 5.
Over the next 24 hours, the highest UV Index reading in Trinity County, CA is expected to be 5 in Mad River between 2:00 PM - 3:00 PM PDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |