As of 4:06 PM PDT on October 6, 2025, all 16 cities in Calaveras County, CA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Arnold, CA with a reading of 2.3.
Over the next 24 hours, the highest UV Index reading in Calaveras County, CA is expected to be 5.8 in Arnold between 1:00 PM - 2:00 PM PDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |