As of 4:03 PM PDT on April 23, 2026, all 1591 cities in California in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Mono City, CA with a reading of 5.2.
Over the next 24 hours, the highest UV Index reading in California is expected to be 9.9 in Big Bear City 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 |