Cape Vincent Weather Forecast

    • 55
    • 72

    Becoming Sunny

    • 59
    • 69

    Sunny

    • 65
    • 75

    Partly Sunny

    • 59
    • 74

    Partly Sunny

    • 61
    • 70

    Mostly Cloudy

    • 60
    • 74

    Rain Showers Likely

Today 10 Sep Jefferson

Mostly sunny. Highs Ranging from the upper 60s on the tug hill to the lower 70s across the lower Elevations. West Winds 10 to 15 Mph.

Tonight 10 Sep Jefferson

Mostly cloudy in the Evening, then clearing. Much cooler with Lows Ranging from the upper 40s across the tug hill to the mid 50s along the lake Ontario shore. Northwest Winds 10 to 15 Mph, becoming light.

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Cape Vincent Temperature Statistics

September Temperature

Watertown, Watertown International Airport (18 miles)

  • Lowest 7 September, 2026

    48 °F

  • Average September

    67.4 °F

  • Highest 2 September, 2026

    83.6 °F

Climate (2021–2026)

Watertown, Watertown International Airport (18 miles)

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  • Average Low 2021–2026

    38.2 °F

  • Average 2021–2026

    48.2 °F

  • Average High 2021–2026

    57.6 °F
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