Long Island Mac Arthur Airport Weather Forecast

    • 66
    • 79

    Becoming Sunny

    • 71
    • 85

    Partly Sunny

    • 74
    • 88

    Mostly Sunny

    • 75
    • 90

    Partly Sunny

    • 73
    • 88

    Chance Rain Showers

    • 72
    • 83

    Chance Rain Showers

Today 22 Jul Southwest Suffolk

Mostly sunny. Highs in the upper 70s. East Winds 5 to 10 Mph.

Tonight 22 Jul Southwest Suffolk

Partly cloudy. Lows in the upper 60s. Northeast Winds 5 to 10 Mph.

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Long Island Mac Arthur Airport Temperature Statistics

July Temperature

Islip, Long Island Mac Arthur Airport (0 miles)

  • Lowest 5 July, 2025

    64.7 °F

  • Average July

    78.2 °F

  • Highest 8 July, 2025

    92.6 °F

Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (0 miles)

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  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    63 °F
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