Chester County, PA: Current UV Index and Hourly Forecast

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As of 11:49 AM EDT on September 21, 2026, out of 44 cities in Chester County, PA in our database, 32 cities (73%) have a UV Index reading of Moderate, while 12 cities (27%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Chadds Ford, PA with a reading of 4.3.

Over the next 24 hours, the highest UV Index reading in Chester County, PA is expected to be 5.7 in Kennett Square between 12:00 PM - 1:00 PM EDT today.

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Current UV Index in Cities in Chester County, PA

• Atglen - 2.3
• Avondale - 4.2
• Berwyn - 4.1
• Chadds Ford - 4.3
• Chesterbrook - 4.1
• Cheyney University - 4.1
• Coatesville - 3.3
• Cochranville - 2.3
• Devon - 4.1
• Dilworthtown - 4.1
• Downingtown - 3.3
• Eagle - 3.3
• Eagleview - 3.3
• Elverson - 0.8
• Exton - 3.3
• Frazer - 4.1
• Glenmoore - 3.3
• Hamorton - 4.2
• Hayti - 3.3
• Kenilworth - 0.8
• Kennett Square - 4.2
• Kimberton - 1.1
• Lincoln University - 3.7
• Lionville - 3.3
• Malvern - 4.1
• Marshallton - 3.3
• Modena - 3.3
• Nottingham - 3.7
• Oxford - 3.7
• Paoli - 4.1
• Parkesburg - 2.3
• Phoenixville - 1.1
• Pomeroy - 2.3
• Pughtown - 0.8
• Sadsburyville - 2.3
• South Coatesville - 3.3
• South Pottstown - 0.8
• Spring City - 1.1
• Thorndale - 3.3
• Toughkenamon - 4.2
• Unionville - 3.3
• West Chester - 4.1
• West Grove - 4.2
• Westwood - 3.3