Port Vivian Weather Forecast

    • 42
    • 67

    Sunny

    • 42
    • 66

    Sunny

    • 46
    • 70

    Partly Sunny

    • 50
    • 70

    Partly Sunny

    • 48
    • 67

    Mostly Cloudy

    • 47
    • 68

    Partly Sunny

    • 52
    • 71

    Partly Sunny

Today 23 Sep Jefferson

Mostly sunny. Highs in the lower 70s.

Tonight 23 Sep Jefferson

Clear. Lows Ranging from around 40 across the tug hill to the mid 40s along the lake Ontario shore. Northeast Winds 5 to 10 Mph, becoming light.

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Port Vivian Temperature Statistics

September Temperature

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

  • Lowest 19 September, 2026

    41.2 °F

  • Average September

    63.9 °F

  • Highest 2 September, 2026

    82.2 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    47.8 °F

  • Average High 2021–2026

    55.9 °F
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