As of 6:19 PM MDT on July 9, 2025, out of 5 cities in Custer County, ID in our database, 4 cities (80%) have a UV Index reading of Low, while 1 city (20%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Stanley, ID with a reading of 2.6.
Over the next 24 hours, the highest UV Index reading in Custer County, ID is expected to be 10.4 in Mackay 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 |