Port Vivian Weather Forecast

    • 42
    • 56

    Mostly Sunny

    • 37
    • 60

    Mostly Sunny

    • 34
    • 57

    Mostly Sunny

    • 34
    • 56

    Mostly Sunny

    • 37
    • 57

    Mostly Sunny

    • 34
    • 52

    Mostly Sunny

Today 18 Oct Jefferson

Some patchy fog Early, otherwise sunny. Highs Ranging from the lower 50s on the tug hill to the mid 50s across the lower Elevations. South Winds 5 to 10 Mph, becoming southwest 10 to 15 Mph.

Tonight 18 Oct Jefferson

Clear with patchy frost developing overnight. Lows Ranging from the upper 30s across the tug hill to the lower 40s along the lake Ontario shore. South Winds 5 to 10 Mph, becoming light.

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Port Vivian Temperature Statistics

October Temperature

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

  • Lowest 6 October, 2026

    33.6 °F

  • Average October

    54.2 °F

  • Highest 1 October, 2026

    70.9 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    39.2 °F

  • Average 2021–2026

    47.7 °F

  • Average High 2021–2026

    55.9 °F
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