As of 2:14 PM MDT on April 25, 2026, out of 5 cities in Custer County, ID in our database, 3 cities (60%) have a UV Index reading of High, while 2 cities (40%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Lost River, ID with a reading of 6.
Over the next 24 hours, the highest UV Index reading in Custer County, ID is expected to be 6.7 in Stanley between 1:00 PM - 2:00 PM MDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |