Jefferson County, NY: Current UV Index and Hourly Forecast

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As of 7:32 PM EDT on July 18, 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 0.5.

Over the next 24 hours, the highest UV Index reading in Jefferson County, NY is expected to be 8.6 in Adams Center between 1:00 PM - 2:00 PM EDT tomorrow.

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Current UV Index in Cities in Jefferson County, NY

• Adams Center - 0.5
• Alexandria Bay - 0.5
• Belleville - 0.5
• Black River - 0.5
• Calcium - 0.5
• Carthage - 0.5
• Chaumont - 0.5
• Deferiet - 0.5
• Depauville - 0.5
• Dexter - 0.5
• Evans Mills - 0.5
• Felts Mills - 0.5
• Fishers Landing - 0.5
• Fort Drum - 0.5
• Glen Park - 0.5
• Great Bend - 0.5
• Herrings - 0.5
• La Fargeville - 0.5
• Mannsville - 0.5
• Natural Bridge - 0.5
• Oxbow - 0.5
• Pamelia Center - 0.5
• Pierrepont Manor - 0.5
• Plessis - 0.5
• Redwood - 0.5
• Sackets Harbor - 0.5
• Thousand Island Park - 0.5
• Three Mile Bay - 0.5
• Watertown - 0.5
• West Carthage - 0.5