As of 3:13 PM PDT on June 10, 2026, out of 56 cities in San Diego County, CA in our database, 36 cities (64%) have a UV Index reading of High, while 20 cities (36%) have a UV Index reading of Very High. The city with the highest UV Index reading right now is Julian, CA with a reading of 7.8.
Over the next 24 hours, the highest UV Index reading in San Diego County, CA is expected to be 10.5 in Rainbow 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 |