As of 12:03 PM CDT on September 13, 2025, out of 23 cities in McLean County, IL in our database, 22 cities (96%) have a UV Index reading of Low, while 1 city (4%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is McLean, IL with a reading of 2.5.
Over the next 24 hours, the highest UV Index reading in McLean County, IL is expected to be 4.8 in Bloomington between 11:00 AM - 12:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |