Northumberland County, PA: Current UV Index and Hourly Forecast

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As of 12:19 PM EDT on September 1, 2025, all 24 cities in Northumberland County, PA in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Sunbury, PA with a reading of 6.2.

Over the next 24 hours, the highest UV Index reading in Northumberland County, PA is expected to be 6.8 in Sunbury between 1:00 PM - 2:00 PM EDT today.

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Current UV Index in Cities in Northumberland County, PA

• Atlas - 6.2
• Dalmatia - 6.1
• Dewart - 6.2
• Elysburg - 6.2
• Fairview-Ferndale - 6.2
• Herndon - 6.2
• Kapp Heights - 6.2
• Kulpmont - 6.2
• Marion Heights - 6.2
• Marshallton - 6.2
• McEwensville - 6.2
• Milton - 6.2
• Montandon - 6.2
• Mount Carmel - 6.2
• Northumberland - 6.2
• Ranshaw - 6.2
• Riverside - 6.2
• Shamokin - 6.2
• Strong - 6.2
• Sunbury - 6.2
• Tharptown - 6.2
• Trevorton - 6.2
• Turbotville - 6.2
• Watsontown - 6.2