Mastic Weather Forecast

    • 16
    • 32

    Snow

    • 20
    • 30

    Partly Sunny

    • 25
    • 35

    Partly Sunny

    • 30
    • 44

    Partly Sunny

    • 43
    • 51

    Mostly Cloudy

    • 24
    • 48

    Slight Chance Snow

Today 14 Dec Southeast Suffolk

Snow this Morning, then partly sunny with a chance of snow this afternoon. Snow accumulation of 2 to 4 Inches. Highs in the lower 30s. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of snow near 100 percent.

Tonight 14 Dec Southeast Suffolk

Mostly cloudy in the Evening, then clearing. Blustery with Lows around 18. Northwest Winds 20 to 25 Mph with Gusts up to 40 Mph. Wind chill Values as low as 1 below.

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Mastic Temperature Statistics

December Temperature

Shirley, Brookhaven Airport (1.9 miles)

  • Lowest 9 December, 2025

    14 °F

  • Average December

    33.3 °F

  • Highest 2 December, 2025

    48.9 °F

Climate (2020–Present)

Shirley, Brookhaven Airport (1.9 miles)

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  • Average Low 2020–2025

    46.5 °F

  • Average 2020–2025

    54.8 °F

  • Average High 2020–2025

    62.8 °F
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