Port Vivian Weather Forecast

    • 70
    • 92

    Chance Thunderstorms

    • 65
    • 85

    Rain Showers Likely

    • 57
    • 83

    Mostly Sunny

    • 59
    • 85

    Sunny

    • 66
    • 88

    Chance Rain Showers

    • 58
    • 83

    Chance Rain Showers

    • 53
    • 75

    Partly Sunny

Today 12 Aug Jefferson

Sunny and hot with Highs Ranging from the mid 80s along the lake Ontario shore to the lower 90s inland. Southwest Winds 5 to 10 Mph.

Tonight 12 Aug Jefferson

Partly to mostly cloudy. A chance of Showers and Thunderstorms late. Very warm with Lows Ranging from the upper 60s on the tug hill to the lower 70s across the lower Elevations. Light south Winds. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Port Vivian Temperature Statistics

August Temperature

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

  • Lowest 1 August, 2025

    48.7 °F

  • Average August

    71.9 °F

  • Highest 10 August, 2025

    91.4 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    39.6 °F

  • Average 2020–2025

    48.1 °F

  • Average High 2020–2025

    56.2 °F
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