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

As of 7:26 PM CDT on July 9, 2025, all 17 cities in St. Charles County, MO in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is New Melle, MO with a reading of 0.5.

Over the next 24 hours, the highest UV Index reading in St. Charles County, MO is expected to be 10.2 in St. Charles 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 St. Charles County, MO as of 7:26 PM CDT, July 9, 2025

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

7:26 PM CDT, July 9, 2025