As of 2:31 PM MDT on March 17, 2026, all 17 cities in Natrona County, WY in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Casper, WY with a reading of 5.2.
Over the next 24 hours, the highest UV Index reading in Natrona County, WY is expected to be 6.2 in Casper between 1:00 PM - 2:00 PM MDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |