As of 3:10 PM CDT on August 20, 2026, out of 5 cities in Calhoun County, IL in our database, 4 cities (80%) have a UV Index reading of High, while 1 city (20%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Batchtown, IL with a reading of 5.9.
Over the next 24 hours, the highest UV Index reading in Calhoun County, IL is expected to be 7.9 in Hardin between 1:00 PM - 2:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |