As of 1:24 PM CST on February 6, 2026, out of 7 cities in Johnson County, IL in our database, 5 cities (71%) have a UV Index reading of Moderate, while 2 cities (29%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Cypress, IL with a reading of 2.9.
Over the next 24 hours, the highest UV Index reading in Johnson County, IL is expected to be 3.5 in Cypress between 12:00 PM - 1:00 PM CST tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |