Butler County, PA: Current UV Index and Hourly Forecast

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As of 5:22 PM EDT on August 31, 2026, all 32 cities in Butler County, PA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Shanor-Northvue, PA with a reading of 1.2.

Over the next 24 hours, the highest UV Index reading in Butler County, PA is expected to be 7.7 in Eau Claire between 1:00 PM - 2:00 PM EDT tomorrow.

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Current UV Index in Cities in Butler County, PA

• Bruin - 1
• Butler - 0.8
• Callery - 0.8
• Cherry Valley - 0.6
• Chicora - 1
• East Butler - 1
• Eau Claire - 0.6
• Evans City - 0.8
• Fairview - 1
• Harmony - 0.8
• Harrisville - 1.1
• Homeacre-Lyndora - 0.8
• Karns City - 1
• Lake Arthur Estates - 1.2
• Mars - 0.8
• Meadowood - 0.8
• Meridian - 0.8
• Nixon - 0.8
• Oak Hills - 0.8
• Petrolia - 1
• Portersville - 1.2
• Prospect - 1.2
• Saxonburg - 1.2
• Seven Fields - 0.8
• Shanor-Northvue - 1.2
• Slippery Rock - 1.2
• Slippery Rock University - 1.2
• Unionville - 1.2
• Valencia - 0.8
• West Liberty - 1.2
• West Sunbury - 1.2
• Zelienople - 0.9