Port Vivian Weather Forecast

    • 43
    • 60

    Decreasing Clouds

    • 43
    • 62

    Mostly Sunny

    • 43
    • 66

    Mostly Sunny

    • 44
    • 66

    Partly Sunny

    • 45
    • 67

    Partly Sunny

    • 48
    • 70

    Partly Sunny

Today 21 Sep Jefferson

Some patchy fog in the Morning, otherwise mostly cloudy. Breezy with Highs Ranging from the mid 50s on the tug hill to around 60 across the lower Elevations. Northeast Winds 5 to 10 Mph.

Tonight 21 Sep Jefferson

Mostly cloudy. Lows Ranging from the lower 40s across the tug hill to the mid 40s along the lake Ontario shore. Northeast Winds 5 to 10 Mph.

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Port Vivian Temperature Statistics

September Temperature

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

  • Lowest 11 September, 2026

    48.2 °F

  • Average September

    65.8 °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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