UV Index Today in Madison County, Illinois (IL)
Wednesday, November 4, 2026 -11:15 AM CST (GMT-6)
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The average maximum UV Index today across 55 locations in Madison County, Illinois (IL), is 1.8. The highest projected maximum is 2.4 in St. Louis at 12:00 PM CST, while the lowest projected maximum is 1.4 in Jarvis at 11:00 AM CST.
Tomorrow, the average maximum UV Index across those same locations is expected to be 3.1. The highest projected maximum is 3.2 in Edwardsville at 12:00 PM CST, and the lowest projected maximum is 3 in Alton at 12:00 PM CST.
23 County Subdivisions in Madison County, Illinois (IL)
Maximum UV Index Today
32 Places in Madison County, Illinois (IL)
Maximum UV Index Today