As of 5:15 PM CDT on May 18, 2026, out of 6 cities in Warren 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 Alexis, IL with a reading of 2.6.
Over the next 24 hours, the highest UV Index reading in Warren County, IL is expected to be 3.6 in Alexis between 10:00 AM - 11:00 AM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |