As of 10:30 AM CDT on August 18, 2026, out of 7 cities in Buchanan County, MO in our database, 4 cities (57%) have a UV Index reading of Low, while 3 cities (43%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is De Kalb, MO with a reading of 2.9.
Over the next 24 hours, the highest UV Index reading in Buchanan County, MO is expected to be 8.8 in De Kalb between 2:00 PM - 3:00 PM CDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |