As of 10:21 AM PDT on July 17, 2026, out of 56 cities in San Diego County, CA in our database, 38 cities (68%) have a UV Index reading of Moderate, while 18 cities (32%) have a UV Index reading of High. The city with the highest UV Index reading right now is Jacumba, CA with a reading of 6.6.
Over the next 24 hours, the highest UV Index reading in San Diego County, CA is expected to be 11.7 in Campo 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 |