Alder Island Weather Forecast

    • 37
    • 39

    Increasing Clouds

    • 35
    • 48

    Rain Likely

    • 28
    • 39

    Breezy

    • 29
    • 38

    Mostly Cloudy

    • 25
    • 38

    Mostly Cloudy

    • 22
    • 34

    Partly Sunny

Today 9 Dec Southern Nassau

Mostly sunny. Highs in the upper 30s. North Winds around 5 Mph, becoming south this afternoon.

Tonight 9 Dec Southern Nassau

Mostly cloudy. Lows in the lower 30s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Alder Island Temperature Statistics

December Temperature

New York, Kennedy International Airport (9.9 miles)

  • Lowest 5 December, 2025

    19.9 °F

  • Average December

    35.4 °F

  • Highest 2 December, 2025

    45 °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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