Madison County, IL: Current UV Index and Hourly Forecast

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As of 7:59 AM CDT on April 12, 2026, all 32 cities in Madison County, IL in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Alton, IL with a reading of 0.1.

Over the next 24 hours, the highest UV Index reading in Madison County, IL is expected to be 8.3 in Alton between 1:00 PM - 2:00 PM CDT today.

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Current UV Index in Cities in Madison County, IL

• Alhambra - 0.1
• Alton - 0.1
• Bethalto - 0.1
• Collinsville - 0.1
• East Alton - 0.1
• Edwardsville - 0.1
• Glen Carbon - 0.1
• Godfrey - 0.1
• Granite City - 0.1
• Grantfork - 0.1
• Hamel - 0.1
• Hartford - 0.1
• Highland - 0.1
• Holiday Shores - 0.1
• Livingston - 0.1
• Madison - 0.1
• Marine - 0.1
• Maryville - 0.1
• Mitchell - 0.1
• Moro - 0.1
• New Douglas - 0.1
• Pontoon Beach - 0.1
• Prairietown - 0.1
• Rosewood Heights - 0.1
• Roxana - 0.1
• South Roxana - 0.1
• St. Jacob - 0.1
• Troy - 0.1
• Venice - 0.1
• Williamson - 0.1
• Wood River - 0.1
• Worden - 0.1