As of 3:08 PM PDT on September 20, 2026, out of 52 cities in San Bernardino County, CA in our database, 28 cities (54%) have a UV Index reading of Moderate, while 24 cities (46%) have a UV Index reading of High. The city with the highest UV Index reading right now is Big Bear Lake, CA with a reading of 5.9.
Over the next 24 hours, the highest UV Index reading in San Bernardino County, CA is expected to be 8.6 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 |