As of 4:31 PM CDT on June 28, 2025, all 3 cities in Marion County, MO in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Hannibal, MO with a reading of 5.7.
Over the next 24 hours, the highest UV Index reading in Marion County, MO is expected to be 8.9 in Hannibal 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 |