LaSalle County, IL: Current UV Index and Hourly Forecast

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As of 8:25 AM CDT on June 23, 2025, all 30 cities in LaSalle County, IL in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Ottawa, IL with a reading of 1.7.

Over the next 24 hours, the highest UV Index reading in LaSalle County, IL is expected to be 10.5 in Peru between 1:00 PM - 2:00 PM CDT today.

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Current UV Index in Cities in LaSalle County, IL

• Cedar Point - 1.6
• Dana - 1.6
• Dayton - 1.7
• Earlville - 1.7
• Grand Ridge - 1.7
• Harding - 1.7
• Kangley - 1.7
• LaSalle - 1.7
• Lake Holiday - 1.7
• Leland - 1.7
• Leonore - 1.7
• Lostant - 1.7
• Marseilles - 1.7
• Mendota - 1.7
• Millington - 1.7
• Naplate - 1.7
• North Utica - 1.7
• Oglesby - 1.7
• Ottawa - 1.7
• Peru - 1.6
• Ransom - 1.7
• Rutland - 1.6
• Seneca - 1.7
• Serena - 1.7
• Sheridan - 1.7
• Streator - 1.7
• Tonica - 1.7
• Triumph - 1.7
• Troy Grove - 1.7
• Wedron - 1.7