Long Island Mac Arthur Airport Weather Forecast

    • 56
    • 63

    Rain

    • 59
    • 68

    Rain Showers

    • 57
    • 67

    Rain Showers Likely

    • 59
    • 70

    Mostly Cloudy

    • 60
    • 72

    Partly Sunny

    • 61
    • 72

    Partly Sunny

Today 26 Sep Southwest Suffolk

Rain with a slight chance of Thunderstorms. Very windy with Highs in the mid 60s. Northeast Winds 30 to 40 Mph with Gusts up to 50 Mph. Chance of rain near 100 percent.

Tonight 26 Sep Southwest Suffolk

Rain with a slight chance of Thunderstorms. Very windy with Lows in the mid 50s. North Winds 30 to 40 Mph with Gusts up to 50 Mph. Chance of rain near 100 percent.

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Long Island Mac Arthur Airport Temperature Statistics

September Temperature

Islip, Long Island Mac Arthur Airport (0 miles)

  • Lowest 15 September, 2026

    52.6 °F

  • Average September

    69.7 °F

  • Highest 10 September, 2026

    86.6 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (0 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63.1 °F
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