As of 11:00 AM CST on February 11, 2026, out of 20 cities in Iroquois County, IL in our database, 18 cities (90%) have a UV Index reading of Moderate, while 2 cities (10%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Cissna Park, IL with a reading of 2.6.
Over the next 24 hours, the highest UV Index reading in Iroquois County, IL is expected to be 2.8 in Cissna Park between 12:00 PM - 1:00 PM CST today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |