As of 1:10 PM CDT on May 29, 2026, out of 14 cities in Randolph County, IL in our database, 13 cities (93%) have a UV Index reading of Low, while 1 city (7%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Coulterville, IL with a reading of 3.4.
Over the next 24 hours, the highest UV Index reading in Randolph County, IL is expected to be 8.5 in Chester between 12:00 PM - 1:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |