As of 5:53 PM EDT on September 23, 2025, all 16 cities in Sussex County, NJ in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Layton, NJ with a reading of 0.9.
Over the next 24 hours, the highest UV Index reading in Sussex County, NJ is expected to be 3.7 in Hopatcong between 11:00 AM - 12:00 PM EDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |