As of 3:24 PM CDT on July 30, 2026, out of 7 cities in Lyman County, SD in our database, 4 cities (57%) have a UV Index reading of Moderate, 2 cities (29%) have a UV Index reading of Low, while 1 city (14%) have a UV Index reading of High. The city with the highest UV Index reading right now is Presho, SD with a reading of 7.1.
Over the next 24 hours, the highest UV Index reading in Lyman County, SD is expected to be 7.7 in Vivian 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 |