Port Vivian Weather Forecast

    • 70
    • 84

    Mostly Sunny

    • 72
    • 91

    Mostly Sunny

    • 63
    • 87

    Partly Sunny

    • 59
    • 83

    Partly Sunny

    • 60
    • 79

    Chance Rain Showers

    • 61
    • 80

    Slight Chance Thunderstorms

Today 13 Jul Jefferson

Sunny. Highs in the mid 80s. Light Winds, becoming southwest 5 to 10 Mph.

Tonight 13 Jul Jefferson

Mainly clear. Lows Ranging from the mid 50s across the tug hill to the lower 60s along the lake Ontario shore. Light south Winds.

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Port Vivian Temperature Statistics

July Temperature

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

  • Lowest 5 July, 2026

    61.3 °F

  • Average July

    75.4 °F

  • Highest 1 July, 2026

    90 °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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