As of 4:29 PM CDT on May 17, 2026, all 3 cities in Marion County, MO in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Hannibal, MO with a reading of 4.8.
Over the next 24 hours, the highest UV Index reading in Marion County, MO is expected to be 8.6 in Philadelphia 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 |