DuPage County, IL: Current UV Index and Hourly Forecast

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As of 10:49 AM CDT on April 21, 2026, all 31 cities in DuPage County, IL in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Bartlett, IL with a reading of 3.3.

Over the next 24 hours, the highest UV Index reading in DuPage County, IL is expected to be 5.6 in Naperville between 2:00 PM - 3:00 PM CDT today.

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Current UV Index in Cities in DuPage County, IL

• Addison - 3.2
• Bartlett - 3.3
• Bensenville - 3.2
• Bloomingdale - 3.2
• Burr Ridge - 3.2
• Carol Stream - 3.3
• Clarendon Hills - 3.2
• Darien - 3.2
• Downers Grove - 3.2
• Elmhurst - 3.2
• Glen Ellyn - 3.2
• Glendale Heights - 3.2
• Hanover Park - 3.3
• Hinsdale - 3.2
• Itasca - 3.2
• Lisle - 3.2
• Lombard - 3.2
• Naperville - 3.2
• Oak Brook - 3.2
• Oakbrook Terrace - 3.2
• Roselle - 3.2
• Villa Park - 3.2
• Warrenville - 3.2
• Wayne - 3.3
• West Chicago - 3.3
• Westmont - 3.2
• Wheaton - 3.2
• Willowbrook - 3.2
• Winfield - 3.3
• Wood Dale - 3.2
• Woodridge - 3.2