Jefferson County, MO: Current UV Index and Hourly Forecast

As of 4:58 PM CDT on September 16, 2025, all 25 cities in Jefferson County, MO in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Festus, MO with a reading of 3.1.

Over the next 24 hours, the highest UV Index reading in Jefferson County, MO is expected to be 6.9 in Festus between 1:00 PM - 2:00 PM CDT tomorrow.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Jefferson County, MO as of 4:58 PM CDT, September 16, 2025

Current UV Index in Cities in Jefferson County, MO

4:58 PM CDT, September 16, 2025