Jefferson County, NY: Current UV Index and Hourly Forecast

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As of 1:32 PM EDT on August 11, 2026, out of 30 cities in Jefferson County, NY in our database, 26 cities (87%) have a UV Index reading of High, while 4 cities (13%) have a UV Index reading of Very High. The city with the highest UV Index reading right now is Adams Center, NY with a reading of 7.5.

Over the next 24 hours, the highest UV Index reading in Jefferson County, NY is expected to be 7.5 in Adams Center between 1:00 PM - 2:00 PM EDT today.

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Current UV Index in Cities in Jefferson County, NY

• Adams Center - 7.5
• Alexandria Bay - 7.2
• Belleville - 7.5
• Black River - 7.3
• Calcium - 7.3
• Carthage - 7.3
• Chaumont - 7.3
• Deferiet - 7.3
• Depauville - 7.2
• Dexter - 7.3
• Evans Mills - 7.3
• Felts Mills - 7.3
• Fishers Landing - 7.2
• Fort Drum - 7.3
• Glen Park - 7.3
• Great Bend - 7.3
• Herrings - 7.3
• La Fargeville - 7.2
• Mannsville - 7.5
• Natural Bridge - 7.3
• Oxbow - 7.2
• Pamelia Center - 7.3
• Pierrepont Manor - 7.5
• Plessis - 7.2
• Redwood - 7.2
• Sackets Harbor - 7.3
• Thousand Island Park - 7.2
• Three Mile Bay - 7.3
• Watertown - 7.3
• West Carthage - 7.3