Alder Island Weather Forecast

    • 39
    • 43

    Rain

    • 30
    • 51

    Rain

    • 29
    • 34

    Breezy

    • 29
    • 37

    Mostly Cloudy

    • 26
    • 34

    Chance Snow

    • 26
    • 33

    Partly Sunny

Today 28 Dec Southern Nassau

Partly sunny late this Morning, then becoming mostly cloudy. A chance of rain this afternoon. Highs around 40. West Winds around 5 Mph, becoming southwest this afternoon. Chance of rain 30 percent.

Tonight 28 Dec Southern Nassau

Rain. Lows in the mid 30s. South Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 90 percent.

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Alder Island Temperature Statistics

December Temperature

New York, Kennedy International Airport (9.9 miles)

  • Lowest 9 December, 2025

    19 °F

  • Average December

    34.3 °F

  • Highest 19 December, 2025

    55.9 °F

Climate (2020–Present)

New York, Kennedy International Airport (9.9 miles)

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  • Average Low 2020–2025

    49.5 °F

  • Average 2020–2025

    56.3 °F

  • Average High 2020–2025

    63.6 °F
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