Mercer County, NJ: Current UV Index and Hourly Forecast

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As of 9:53 PM EDT on June 24, 2026, all 17 cities in Mercer County, NJ in our database have a UV Index reading of 0, indicating no radiation from the sun.

Over the next 24 hours, the highest UV Index reading in Mercer County, NJ is expected to be 8.4 in Titusville between 1:00 PM - 2:00 PM EDT tomorrow.

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Current UV Index in Cities in Mercer County, NJ

• Groveville - 0
• Hamilton Square - 0
• Hightstown - 0
• Hopewell - 0
• Lawrenceville - 0
• Mercerville - 0
• Pennington - 0
• Princeton - 0
• Princeton Junction - 0
• The College of New Jersey - 0
• Titusville - 0
• Trenton - 0
• Twin Rivers - 0
• Washington Crossing - 0
• White Horse - 0
• Windsor - 0
• Yardville - 0