As of 10:26 AM MST on November 26, 2025, all 14 cities in Fremont County, WY in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Riverton, WY with a reading of 0.7.
Over the next 24 hours, the highest UV Index reading in Fremont County, WY is expected to be 1.7 in Lander between 12:00 PM - 1:00 PM MST today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |