Long Island Mac Arthur Airport Weather Forecast

    • 9
    • 23

    Increasing Clouds

    • 7
    • 22

    Mostly Sunny

    • 4
    • 18

    Partly Sunny

    • 14
    • 21

    Chance Snow

    • 17
    • 26

    Chance Snow

    • 17
    • 31

    Partly Sunny

    • 16
    • 32

    Partly Sunny

Today 28 Jan Southwest Suffolk

Partly sunny. Cold with Highs in the lower 20s. West Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 28 Jan Southwest Suffolk

Mostly cloudy with a slight chance of snow in the Evening, then partly cloudy after midnight. Lows 8 to 14 above. West Winds 10 to 15 Mph. Chance of snow 20 percent. Wind chill Values as low as 1 below.

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Long Island Mac Arthur Airport Temperature Statistics

January Temperature

Islip, Long Island Mac Arthur Airport (0 miles)

  • Lowest 21 January, 2026

    8.7 °F

  • Average January

    33 °F

  • Highest 9 January, 2026

    51.7 °F

Climate (2021–Present)

Islip, Long Island Mac Arthur Airport (0 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63.1 °F
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