LaSalle County, IL: Current UV Index and Hourly Forecast

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As of 2:25 PM CDT on April 1, 2025, out of 30 cities in LaSalle County, IL in our database, 26 cities (87%) have a UV Index reading of Moderate, while 4 cities (13%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Seneca, IL with a reading of 3.5.

Over the next 24 hours, the highest UV Index reading in LaSalle County, IL is expected to be 3.5 in Seneca between 2:00 PM - 3:00 PM CDT today.

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Current UV Index in Cities in LaSalle County, IL

• Cedar Point - 2.3
• Dana - 1.9
• Dayton - 3.2
• Earlville - 2.7
• Grand Ridge - 3.1
• Harding - 3.2
• Kangley - 3.1
• LaSalle - 2.8
• Lake Holiday - 3.2
• Leland - 3.2
• Leonore - 2.8
• Lostant - 2.8
• Marseilles - 3.1
• Mendota - 2.7
• Millington - 3.4
• Naplate - 2.8
• North Utica - 2.8
• Oglesby - 2.8
• Ottawa - 3.1
• Peru - 2.3
• Ransom - 3.1
• Rutland - 1.9
• Seneca - 3.5
• Serena - 3.2
• Sheridan - 3.2
• Streator - 2.5
• Tonica - 2.8
• Triumph - 2.7
• Troy Grove - 2.7
• Wedron - 3.2