Port Vivian Weather Forecast

    • 15
    • 26

    Snow Showers

    • 8
    • 32

    Snow

    • 2
    • 18

    Chance Snow Showers

    • 10
    • 24

    Snow Showers Likely

    • 20
    • 28

    Chance Rain Showers

    • 25
    • 38

    Chance Rain Showers

    • 19
    • 42

    Rain Showers Likely

Today 12 Dec Jefferson

Partly sunny with a 50 percent chance of snow Showers. Highs Ranging from the mid 20s inland to around 30 along the lake Ontario shore. West Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 12 Dec Jefferson

A chance of lake effect snow Showers Early, then lake effect snow late this evening. Snow Showers likely after midnight. Accumulation 1 to 3 Inches in the most persistent Snows. Lows Ranging from 15 to 20 across the tug hill to 20 to 25 along the lake Ontario shore. West Winds 5 to 10 Mph, becoming south. Chance of snow 90 percent.

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Port Vivian Temperature Statistics

December Temperature

Fort Drum / Wheeler-Sack U. S. Army Airfield (21.1 miles)

  • Lowest 5 December, 2025

    -2.6 °F

  • Average December

    20.1 °F

  • Highest 10 December, 2025

    35.8 °F

Climate (2020–Present)

Fort Drum / Wheeler-Sack U. S. Army Airfield (21.1 miles)

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  • Average Low 2020–2025

    39.6 °F

  • Average 2020–2025

    48 °F

  • Average High 2020–2025

    56.1 °F
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