As of 8:22 AM CST on December 6, 2025, all 11 cities in Boone County, MO in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Centralia, MO with a reading of 0.2.
Over the next 24 hours, the highest UV Index reading in Boone County, MO is expected to be 2.2 in Centralia between 12:00 PM - 1:00 PM CST today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |