Port Vivian Weather Forecast

    • 32
    • 56

    Decreasing Clouds

    • 33
    • 52

    Partly Sunny

    • 45
    • 59

    Partly Sunny

    • 46
    • 61

    Mostly Cloudy

    • 49
    • 62

    Chance Rain Showers

    • 50
    • 64

    Chance Rain Showers

Today 30 Oct Jefferson

Partly sunny. Highs Ranging from around 50 on the tug hill to the mid 50s across the lower Elevations. West Winds 10 to 15 Mph.

Tonight 30 Oct Jefferson

Mostly cloudy in the Evening, then clearing. Colder with Lows Ranging from the lower 30s across the tug hill to the mid 30s along the lake Ontario shore. Northwest 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 27 October, 2026

    28.6 °F

  • Average October

    50.4 °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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