As of 10:00 AM CDT on August 19, 2026, out of 7 cities in Johnson County, IL in our database, 4 cities (57%) have a UV Index reading of Moderate, while 3 cities (43%) have a UV Index reading of Low. The city with the highest UV Index reading right now is New Burnside, IL with a reading of 4.2.
Over the next 24 hours, the highest UV Index reading in Johnson County, IL is expected to be 8.1 in New Burnside between 12:00 PM - 1:00 PM CDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |