DuPage County, IL: Current UV Index and Hourly Forecast

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As of 12:58 PM CDT on September 18, 2025, all 31 cities in DuPage County, IL in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Naperville, IL with a reading of 5.7.

Over the next 24 hours, the highest UV Index reading in DuPage County, IL is expected to be 6.1 in Naperville between 1:00 PM - 2:00 PM CDT today.

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Current UV Index in Cities in DuPage County, IL

• Addison - 5.6
• Bartlett - 5.6
• Bensenville - 5.6
• Bloomingdale - 5.6
• Burr Ridge - 5.7
• Carol Stream - 5.6
• Clarendon Hills - 5.7
• Darien - 5.7
• Downers Grove - 5.7
• Elmhurst - 5.6
• Glen Ellyn - 5.7
• Glendale Heights - 5.6
• Hanover Park - 5.6
• Hinsdale - 5.7
• Itasca - 5.6
• Lisle - 5.7
• Lombard - 5.7
• Naperville - 5.7
• Oak Brook - 5.7
• Oakbrook Terrace - 5.7
• Roselle - 5.6
• Villa Park - 5.6
• Warrenville - 5.7
• Wayne - 5.6
• West Chicago - 5.6
• Westmont - 5.7
• Wheaton - 5.7
• Willowbrook - 5.7
• Winfield - 5.6
• Wood Dale - 5.6
• Woodridge - 5.7