As of 10:04 AM PDT on September 2, 2026, out of 23 cities in Mendocino County, CA in our database, 12 cities (52%) have a UV Index reading of Low, while 11 cities (48%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Boonville, CA with a reading of 2.9.
Over the next 24 hours, the highest UV Index reading in Mendocino County, CA is expected to be 7.3 in Brooktrails 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 |