As of 11:27 AM CDT on May 12, 2025, out of 6 cities in Union County, IL in our database, 4 cities (67%) have a UV Index reading of Low, while 2 cities (33%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Dongola, IL with a reading of 4.4.
Over the next 24 hours, the highest UV Index reading in Union County, IL is expected to be 7.8 in Anna between 2:00 PM - 3:00 PM CDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |