As of 5:06 PM MDT on June 21, 2026, all 2 cities in Gem County, ID in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Letha, ID with a reading of 4.6.
Over the next 24 hours, the highest UV Index reading in Gem County, ID is expected to be 9.2 in Emmett between 2:00 PM - 3:00 PM MDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |