As of 3:41 PM CDT on July 19, 2025, all 5 cities in Mellette County, SD in our database have a UV Index reading of Very High. The city with the highest UV Index reading right now is Corn Creek, SD with a reading of 7.9.
Over the next 24 hours, the highest UV Index reading in Mellette County, SD is expected to be 9.5 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 |