Port Vivian Weather Forecast

    • 62
    • 79

    Mostly Cloudy

    • 55
    • 76

    Rain Showers Likely

    • 54
    • 77

    Mostly Sunny

    • 57
    • 79

    Mostly Sunny

    • 59
    • 80

    Rain Showers Likely

    • 55
    • 75

    Rain Showers Likely

Today 18 Aug Jefferson

Some patchy fog Early, otherwise partly to mostly sunny. Highs Ranging from the lower 70s on the tug hill to the upper 70s across the lower Elevations. Light Winds.

Tonight 18 Aug Jefferson

Partly cloudy. Lows Ranging from the upper 50s across the tug hill to the mid 60s along the lake Ontario shore. Light south Winds.

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  • Temperature Forecast NOAA

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Port Vivian Temperature Statistics

August Temperature

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

  • Lowest 15 August, 2026

    54.5 °F

  • Average August

    71.5 °F

  • Highest 5 August, 2026

    86.7 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    39.4 °F

  • Average 2021–2026

    47.8 °F

  • Average High 2021–2026

    55.9 °F
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