As of 4:02 PM MDT on May 20, 2026, all 4 cities in Niobrara County, WY in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Lusk, WY with a reading of 4.1.
Over the next 24 hours, the highest UV Index reading in Niobrara County, WY is expected to be 6.2 in Van Tassell between 12:00 PM - 1:00 PM MDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |