As of 12:08 PM PDT on May 29, 2026, out of 23 cities in Santa Clara County, CA in our database, 18 cities (78%) have a UV Index reading of Moderate, 3 cities (13%) have a UV Index reading of High, while 2 cities (9%) have a UV Index reading of Very High. The city with the highest UV Index reading right now is Gilroy, CA with a reading of 8.1.
Over the next 24 hours, the highest UV Index reading in Santa Clara County, CA is expected to be 8.3 in Santa Clara 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 |