As of 3:42 PM CDT on June 28, 2024, all 7 cities in Johnson County, IL in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Cypress, IL with a reading of 6.6.
Over the next 24 hours, the highest UV Index reading in Johnson County, IL is expected to be 9.8 in Vienna between 2:00 PM - 3:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |