Port Vivian Weather Forecast

    • 44
    • 68

    Increasing Clouds

    • 47
    • 65

    Partly Sunny

    • 46
    • 65

    Chance Rain Showers

    • 44
    • 62

    Mostly Cloudy

    • 44
    • 62

    Partly Sunny

    • 47
    • 64

    Chance Rain Showers

Today 18 Sep Jefferson

Mostly sunny. Highs Ranging from the mid 60s on the tug hill to the upper 60s across the lower Elevations. Light Winds, becoming north 5 to 10 Mph.

Tonight 18 Sep Jefferson

Mostly cloudy in the Evening, then becoming partly cloudy. Cooler with Lows Ranging from the lower 40s across the tug hill to the upper 40s along the lake Ontario shore. North 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 11 September, 2026

    48.2 °F

  • Average September

    66.1 °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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