DuPage County, IL: Current UV Index and Hourly Forecast

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As of 3:01 PM CDT on September 28, 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 Naperville, IL with a reading of 3.5.

Over the next 24 hours, the highest UV Index reading in DuPage County, IL is expected to be 5.6 in Naperville between 1:00 PM - 2:00 PM CDT tomorrow.

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Current UV Index in Cities in DuPage County, IL

• Addison - 3.5
• Bartlett - 3.5
• Bensenville - 3.5
• Bloomingdale - 3.5
• Burr Ridge - 3.4
• Carol Stream - 3.5
• Clarendon Hills - 3.4
• Darien - 3.4
• Downers Grove - 3.4
• Elmhurst - 3.5
• Glen Ellyn - 3.4
• Glendale Heights - 3.5
• Hanover Park - 3.5
• Hinsdale - 3.4
• Itasca - 3.5
• Lisle - 3.4
• Lombard - 3.4
• Naperville - 3.5
• Oak Brook - 3.4
• Oakbrook Terrace - 3.4
• Roselle - 3.5
• Villa Park - 3.5
• Warrenville - 3.5
• Wayne - 3.5
• West Chicago - 3.5
• Westmont - 3.4
• Wheaton - 3.4
• Willowbrook - 3.4
• Winfield - 3.5
• Wood Dale - 3.5
• Woodridge - 3.4