Cape Vincent Weather Forecast

    • 59
    • 70

    Chance Rain Showers

    • 55
    • 74

    Chance Rain Showers

    • 56
    • 74

    Partly Sunny

    • 58
    • 76

    Partly Sunny

    • 59
    • 77

    Mostly Sunny

Today 13 Sep Jefferson

Mostly cloudy. Highs in the lower 70s. West Winds 10 Mph or less.

Tonight 13 Sep Jefferson

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

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Cape Vincent Temperature Statistics

September Temperature

Watertown, Watertown International Airport (18 miles)

  • Lowest 9 September, 2025

    39.9 °F

  • Average September

    61.3 °F

  • Highest 4 September, 2025

    80.1 °F

Climate (2020–Present)

Watertown, Watertown International Airport (18 miles)

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  • Average Low 2020–2025

    38.9 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    57.7 °F
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