UV Index Today in St. Louis County, Missouri (MO)
Friday, August 7, 2026 -2:12 PM CDT (GMT-5)
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The average maximum UV Index today across 122 locations in St. Louis County, Missouri (MO), is 8.3. The highest projected maximum is 8.4 in Concord at 1:00 PM CDT, while the lowest projected maximum is 8 in Weldon Spring at 1:00 PM CDT.
Tomorrow, the average maximum UV Index across those same locations is expected to be 8.4. The highest projected maximum is 8.5 in Chesterfield at 1:00 PM CDT, and the lowest projected maximum is 8.4 in St. Louis at 1:00 PM CDT.
28 County Subdivisions in St. Louis County, Missouri (MO)
Maximum UV Index Today
94 Places in St. Louis County, Missouri (MO)
Maximum UV Index Today