As of 2:22 PM MDT on July 21, 2026, out of 237 cities in Idaho in our database, 172 cities (73%) have a UV Index reading of Very High, 36 cities (15%) have a UV Index reading of Extreme, 15 cities (6%) have a UV Index reading of High, 13 cities (5%) have a UV Index reading of Moderate, while 1 city (0%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Tetonia, ID with a reading of 10.8.
Over the next 24 hours, the highest UV Index reading in Idaho is expected to be 10.8 in Tetonia 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 |