Port Vivian Weather Forecast

    • 45
    • 63

    Rain Showers Likely

    • 43
    • 60

    Mostly Cloudy

    • 43
    • 62

    Partly Sunny

    • 43
    • 66

    Partly Sunny

    • 44
    • 66

    Mostly Cloudy

    • 45
    • 67

    Mostly Cloudy

    • 48
    • 70

    Mostly Cloudy

Today 20 Sep Jefferson

Mostly sunny. Highs around 70.

Tonight 20 Sep Jefferson

Mostly cloudy and breezy. Lows Ranging from the lower 40s across the tug hill to the upper 40s along the lake Ontario shore. Light Winds, becoming north 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

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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