Grand Isle Weather Forecast

    • 31
    • 43

    Chance Rain/Snow

    • 28
    • 35

    Chance Rain/Snow

    • 24
    • 35

    Snow Showers Likely

    • 30
    • 40

    Rain/Snow

    • 20
    • 35

    Chance Snow Showers

    • 20
    • 30

    Chance Snow Showers

Today 27 Nov Grand Isle

Partly sunny. A slight chance of rain Showers in the afternoon. Breezy with Highs in the lower 40s. Southwest Winds 15 to 25 Mph. Chance of rain 20 percent.

Tonight 27 Nov Grand Isle

Mostly cloudy. A chance of snow Showers. Little or no snow accumulation. Lows in the lower 30s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of snow 50 percent.

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Grand Isle Temperature Statistics

November Temperature

Plattsburgh International Airport (9.3 miles)

  • Lowest 19 November, 2025

    18 °F

  • Average November

    36.3 °F

  • Highest 3 November, 2025

    54 °F

Climate (2020–Present)

Plattsburgh International Airport (9.3 miles)

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  • Average Low 2020–2025

    38.6 °F

  • Average 2020–2025

    47.7 °F

  • Average High 2020–2025

    56.1 °F
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