Union County, NJ: Current UV Index and Hourly Forecast

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As of 9:01 AM EDT on September 5, 2025, all 19 cities in Union County, NJ in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Elizabeth, NJ with a reading of 1.7.

Over the next 24 hours, the highest UV Index reading in Union County, NJ is expected to be 7.2 in Elizabeth between 1:00 PM - 2:00 PM EDT today.

Search Cities in Union County, NJ

Current UV Index in Cities in Union County, NJ

• Connecticut Farms - 1.7
• Cranford - 1.7
• Elizabeth - 1.7
• Fanwood - 1.7
• Garwood - 1.7
• Kean University - 1.7
• Kenilworth - 1.7
• Linden - 1.7
• Mountainside - 1.7
• New Providence - 1.7
• Plainfield - 1.6
• Rahway - 1.7
• Roselle - 1.7
• Roselle Park - 1.7
• Springfield - 1.7
• Summit - 1.7
• Union - 1.7
• Vauxhall - 1.7
• Westfield - 1.7