UV Index Today in Madison County, Illinois (IL)
Friday, May 22, 2026 -1:38 PMCDT (GMT-5)
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The average maximum UV Index today across 55 locations in Madison County, Illinois (IL), is 3.3. The highest projected maximum is 4.2 in Staunton at 1:00 PM CDT, while the lowest projected maximum is 1.6 in St. Louis at 2:00 PM CDT.
Tomorrow, the average maximum UV Index across those same locations is expected to be 6.8. The highest projected maximum is 7.4 in St. Louis at 1:00 PM CDT, and the lowest projected maximum is 5.3 in Wood River at 1:00 PM CDT.
23 County Subdivisions in Madison County, Illinois (IL)
Maximum UV Index Today
32 Places in Madison County, Illinois (IL)
Maximum UV Index Today