UV Index Today in Madison County, Illinois (IL)
Saturday, August 8, 2026 -10:48 AM CDT (GMT-5)
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The average maximum UV Index today across 55 locations in Madison County, Illinois (IL), is 8.5. The highest projected maximum is 8.6 in Edwardsville at 1:00 PM CDT, while the lowest projected maximum is 8.4 in Alton at 1:00 PM CDT.
Tomorrow, the average maximum UV Index across those same locations is expected to be 8.2. The highest projected maximum is 8.2 in St. Louis at 1:00 PM CDT, and the lowest projected maximum is 8.2 in St. Louis 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