As of 12:27 PM PDT on March 21, 2026, out of 33 cities in Stanislaus County, CA in our database, 28 cities (85%) have a UV Index reading of High, while 5 cities (15%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Patterson, CA with a reading of 5.8.
Over the next 24 hours, the highest UV Index reading in Stanislaus County, CA is expected to be 6.4 in Patterson 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 |