As of 11:06 AM CST on February 22, 2025, all 1461 cities in Illinois in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Cairo, IL with a reading of 4.6.
Over the next 24 hours, the highest UV Index reading in Illinois is expected to be 5 in Cairo 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 |