As of 5:05 PM CDT on August 10, 2025, all 13 cities in Sioux County, IA in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Hawarden, IA with a reading of 2.9.
Over the next 24 hours, the highest UV Index reading in Sioux County, IA is expected to be 6.9 in Orange City between 1:00 PM - 2:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |