As of 7:45 PM MDT on September 16, 2025, all 237 cities in Idaho in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Caldwell, ID with a reading of 0.3.
Over the next 24 hours, the highest UV Index reading in Idaho is expected to be 6.9 in Ketchum 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 |