St. Clair County, MO: Current UV Index and Hourly Forecast

As of 3:27 PM CDT on May 20, 2026, out of 7 cities in St. Clair County, MO in our database, 5 cities (71%) have a UV Index reading of Low, while 2 cities (29%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Appleton City, MO with a reading of 4.8.

Over the next 24 hours, the highest UV Index reading in St. Clair County, MO is expected to be 4.8 in Appleton City between 3:00 PM - 4:00 PM CDT today.

Search Cities in St. Clair County, MO

UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in St. Clair County, MO as of 3:27 PM CDT, May 20, 2026

Current UV Index in Cities in St. Clair County, MO

3:27 PM CDT, May 20, 2026