As of 6:27 PM CDT on July 23, 2026, all 7 cities in DeKalb County, MO in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Union Star, MO with a reading of 1.6.
Over the next 24 hours, the highest UV Index reading in DeKalb County, MO is expected to be 8.5 in Maysville 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 |