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

As of 11:16 PM CDT on May 21, 2025, all 98 cities in St. Louis County, MO in our database have a UV Index reading of 0, indicating no radiation from the sun.

Over the next 24 hours, the highest UV Index reading in St. Louis County, MO is expected to be 8.3 in Wildwood 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. Louis County, MO as of 11:16 PM CDT, May 21, 2025

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

11:16 PM CDT, May 21, 2025