As of 3:28 PM CDT on October 27, 2025, all 10 cities in Black Hawk County, IA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Waterloo, IA with a reading of 2.2.
Over the next 24 hours, the highest UV Index reading in Black Hawk County, IA is expected to be 2.2 in Waterloo between 3:00 PM - 4:00 PM CDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |