As of 4:58 PM MDT on July 8, 2026, all 14 cities in Pennington County, SD in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Box Elder, SD with a reading of 5.1.
Over the next 24 hours, the highest UV Index reading in Pennington County, SD is expected to be 8.7 in Hill City between 12:00 PM - 1:00 PM MDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |