Madison County, IL: Current UV Index and Hourly Forecast

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As of 1:12 PM CDT on March 19, 2026, all 32 cities in Madison County, IL in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Granite City, IL with a reading of 5.7.

Over the next 24 hours, the highest UV Index reading in Madison County, IL is expected to be 5.7 in Granite City between 1:00 PM - 2:00 PM CDT today.

Search Cities in Madison County, IL

Current UV Index in Cities in Madison County, IL

• Alhambra - 5.6
• Alton - 5.6
• Bethalto - 5.6
• Collinsville - 5.7
• East Alton - 5.6
• Edwardsville - 5.7
• Glen Carbon - 5.7
• Godfrey - 5.6
• Granite City - 5.7
• Grantfork - 5.6
• Hamel - 5.6
• Hartford - 5.7
• Highland - 5.6
• Holiday Shores - 5.6
• Livingston - 5.6
• Madison - 5.7
• Marine - 5.6
• Maryville - 5.7
• Mitchell - 5.7
• Moro - 5.6
• New Douglas - 5.6
• Pontoon Beach - 5.7
• Prairietown - 5.6
• Rosewood Heights - 5.6
• Roxana - 5.7
• South Roxana - 5.7
• St. Jacob - 5.6
• Troy - 5.7
• Venice - 5.7
• Williamson - 5.6
• Wood River - 5.7
• Worden - 5.6