As of 12:53 PM PDT on September 12, 2026, out of 16 cities in Calaveras County, CA in our database, 10 cities (63%) have a UV Index reading of Very High, while 6 cities (38%) have a UV Index reading of High. The city with the highest UV Index reading right now is Arnold, CA with a reading of 8.
Over the next 24 hours, the highest UV Index reading in Calaveras County, CA is expected to be 8.8 in Arnold between 1:00 PM - 2:00 PM PDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |