Knox County, IL: Current UV Index and Hourly Forecast

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As of 5:19 PM CDT on June 9, 2026, all 16 cities in Knox County, IL in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Galesburg, IL with a reading of 3.4.

Over the next 24 hours, the highest UV Index reading in Knox County, IL is expected to be 9.6 in Yates City between 12:00 PM - 1:00 PM CDT tomorrow.

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Current UV Index in Cities in Knox County, IL

• Abingdon - 3.3
• Altona - 3.3
• East Galesburg - 3.3
• Galesburg - 3.4
• Gilson - 3.1
• Henderson - 3.3
• Knoxville - 3.3
• Maquon - 3.1
• Oak Run - 3.3
• Oneida - 3.3
• Rio - 3.4
• St. Augustine - 3.3
• Victoria - 3.3
• Wataga - 3.3
• Williamsfield - 3.3
• Yates City - 2.5