Jefferson County, NY: Current UV Index and Hourly Forecast

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As of 1:22 PM EST on December 15, 2025, all 30 cities in Jefferson County, NY in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Watertown, NY with a reading of 1.2.

Over the next 24 hours, the highest UV Index reading in Jefferson County, NY is expected to be 1.5 in Adams Center between 12:00 PM - 1:00 PM EST tomorrow.

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Current UV Index in Cities in Jefferson County, NY

• Adams Center - 1
• Alexandria Bay - 1
• Belleville - 1
• Black River - 1.2
• Calcium - 1.2
• Carthage - 1.2
• Chaumont - 0.8
• Deferiet - 1.2
• Depauville - 1
• Dexter - 1.2
• Evans Mills - 1.2
• Felts Mills - 1.2
• Fishers Landing - 1
• Fort Drum - 1.2
• Glen Park - 1.2
• Great Bend - 1.2
• Herrings - 1.2
• La Fargeville - 1
• Mannsville - 1
• Natural Bridge - 1.2
• Oxbow - 1.1
• Pamelia Center - 1.2
• Pierrepont Manor - 1
• Plessis - 1.1
• Redwood - 1.1
• Sackets Harbor - 1.2
• Thousand Island Park - 1
• Three Mile Bay - 0.8
• Watertown - 1.2
• West Carthage - 1.2