As of 5:10 PM CDT on September 1, 2026, all 5 cities in Mellette County, SD in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is White River, SD with a reading of 1.8.
Over the next 24 hours, the highest UV Index reading in Mellette County, SD is expected to be 7.6 in Corn Creek between 2:00 PM - 3:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |