As of 12:12 PM MDT on August 28, 2025, out of 7 cities in Jefferson County, ID in our database, 4 cities (57%) have a UV Index reading of Moderate, while 3 cities (43%) have a UV Index reading of High. The city with the highest UV Index reading right now is Rigby, ID with a reading of 5.6.
Over the next 24 hours, the highest UV Index reading in Jefferson County, ID is expected to be 6.8 in Mud Lake between 2:00 PM - 3:00 PM MDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |