As of 11:37 PM EDT on March 31, 2026, all 23 cities in Passaic County, NJ in our database have a UV Index reading of 0, indicating no radiation from the sun.
Over the next 24 hours, the highest UV Index reading in Passaic County, NJ is expected to be 4.6 in Upper Greenwood Lake between 12:00 PM - 1:00 PM EDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |