Long Island Weather Forecast

    • 24
    • 45

    Partly Sunny

    • 28
    • 33

    Chance Snow

    • 32
    • 37

    Snow

    • 27
    • 37

    Slight Chance Snow Showers

    • 32
    • 40

    Chance Rain/Sleet

    • 30
    • 39

    Chance Rain/Sleet

    • 30
    • 35

    Chance Snow

Today 21 Dec Suffolk

Sunny. Highs in the mid 40s. Temperature falling into the mid 30s late. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 21 Dec Suffolk

Partly cloudy this Evening, then becoming mostly clear. Cooler with Lows in the lower 20s. Northwest Winds 15 to 20 Mph with Gusts up to 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Long Island Temperature Statistics

December Temperature

Boston, Logan International Airport (3.1 miles)

  • Lowest 5 December, 2025

    12 °F

  • Average December

    32.6 °F

  • Highest 19 December, 2025

    59 °F

Climate (2020–Present)

Boston, Logan International Airport (3.1 miles)

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  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    53.8 °F

  • Average High 2020–2025

    61.1 °F
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