Madison County, IL: Current UV Index and Hourly Forecast

• USA →
• Illinois →
• Madison County

As of 8:47 AM CST on November 5, 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 0.3.

Over the next 24 hours, the highest UV Index reading in Madison County, IL is expected to be 3.1 in Granite City between 12:00 PM - 1:00 PM CST today.

Search Cities in Madison County, IL

Current UV Index in Cities in Madison County, IL

• Alhambra - 0.3
• Alton - 0.3
• Bethalto - 0.3
• Collinsville - 0.3
• East Alton - 0.3
• Edwardsville - 0.3
• Glen Carbon - 0.3
• Godfrey - 0.3
• Granite City - 0.3
• Grantfork - 0.3
• Hamel - 0.3
• Hartford - 0.3
• Highland - 0.3
• Holiday Shores - 0.3
• Livingston - 0.3
• Madison - 0.3
• Marine - 0.3
• Maryville - 0.3
• Mitchell - 0.3
• Moro - 0.3
• New Douglas - 0.3
• Pontoon Beach - 0.3
• Prairietown - 0.3
• Rosewood Heights - 0.3
• Roxana - 0.3
• South Roxana - 0.3
• St. Jacob - 0.3
• Troy - 0.3
• Venice - 0.3
• Williamson - 0.3
• Wood River - 0.3
• Worden - 0.3