LaSalle County, IL: Current UV Index and Hourly Forecast

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As of 2:34 PM CDT on August 8, 2025, out of 30 cities in LaSalle County, IL in our database, 17 cities (57%) have a UV Index reading of Very High, while 13 cities (43%) have a UV Index reading of High. The city with the highest UV Index reading right now is Streator, IL with a reading of 7.6.

Over the next 24 hours, the highest UV Index reading in LaSalle County, IL is expected to be 7.9 in Streator between 1:00 PM - 2:00 PM CDT tomorrow.

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Current UV Index in Cities in LaSalle County, IL

• Cedar Point - 7.6
• Dana - 7.6
• Dayton - 7.1
• Earlville - 7.1
• Grand Ridge - 7.5
• Harding - 7.1
• Kangley - 7.5
• LaSalle - 7.6
• Lake Holiday - 7.1
• Leland - 7.1
• Leonore - 7.6
• Lostant - 7.6
• Marseilles - 7.5
• Mendota - 7.1
• Millington - 6.9
• Naplate - 7.6
• North Utica - 7.6
• Oglesby - 7.6
• Ottawa - 7.5
• Peru - 7.6
• Ransom - 7.5
• Rutland - 7.6
• Seneca - 7.2
• Serena - 7.1
• Sheridan - 7.1
• Streator - 7.6
• Tonica - 7.6
• Triumph - 7.1
• Troy Grove - 7.1
• Wedron - 7.1