Warren County, NJ: Current UV Index and Hourly Forecast

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As of 10:43 AM EDT on June 19, 2026, all 33 cities in Warren County, NJ in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Johnsonburg, NJ with a reading of 4.7.

Over the next 24 hours, the highest UV Index reading in Warren County, NJ is expected to be 9.7 in Finesville between 1:00 PM - 2:00 PM EDT today.

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Current UV Index in Cities in Warren County, NJ

• Alpha - 4.4
• Anderson - 4.2
• Asbury - 4.2
• Beattystown - 4.2
• Belvidere - 4.2
• Brainards - 4.4
• Brass Castle - 4.2
• Bridgeville - 4.2
• Broadway - 4.2
• Brookfield - 4.2
• Buttzville - 4.2
• Columbia - 4.7
• Delaware Park - 4.4
• Finesville - 4.1
• Great Meadows - 4.7
• Hackettstown - 4.2
• Hainesburg - 4.7
• Hutchinson - 4.2
• Johnsonburg - 4.7
• Lopatcong Overlook - 4.4
• Marksboro - 4.7
• Mount Hermon - 4.7
• Mountain Lake - 4.2
• New Village - 4.2
• Panther Valley - 4.5
• Phillipsburg - 4.4
• Port Colden - 4.2
• Port Murray - 4.2
• Stewartsville - 4.2
• Upper Pohatcong - 4.4
• Upper Stewartsville - 4.2
• Vienna - 4.2
• Washington - 4.2