As of 8:19 PM CDT on April 26, 2026, all 13 cities in Sioux County, IA in our database have a UV Index reading of 0, indicating no radiation from the sun.
Over the next 24 hours, the highest UV Index reading in Sioux County, IA is expected to be 1.7 in Orange City between 3:00 PM - 4:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |