New Castle County, DE: Current UV Index and Hourly Forecast

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As of 1:50 PM EDT on October 12, 2026, all 26 cities in New Castle County, DE in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Newark, DE with a reading of 4.7.

Over the next 24 hours, the highest UV Index reading in New Castle County, DE is expected to be 4.7 in Newark between 1:00 PM - 2:00 PM EDT today.

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Current UV Index in Cities in New Castle County, DE

• Arden - 4.6
• Ardencroft - 4.6
• Ardentown - 4.6
• Bear - 4.7
• Bellefonte - 4.6
• Brookside - 4.7
• Claymont - 4.6
• Delaware City - 4.7
• Edgemoor - 4.6
• Elsmere - 4.6
• Glasgow - 4.7
• Greenville - 4.6
• Hockessin - 4.7
• Middletown - 4.7
• New Castle - 4.6
• Newark - 4.7
• Newport - 4.6
• North Star - 4.7
• Odessa - 4.7
• Pike Creek - 4.7
• Pike Creek Valley - 4.7
• Port Penn - 4.7
• St. Georges - 4.7
• Townsend - 4.7
• Wilmington - 4.6
• Wilmington Manor - 4.6