Holbrook Weather Forecast

    • 60
    • 75

    Chance Rain Showers

    • 62
    • 72

    Chance Rain Showers

    • 62
    • 76

    Mostly Sunny

    • 57
    • 80

    Mostly Sunny

    • 55
    • 71

    Mostly Sunny

    • 56
    • 71

    Mostly Sunny

Today 16 Sep Southwest Suffolk

Mostly cloudy this Morning, then becoming partly sunny. Highs in the lower 70s. East Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 16 Sep Southwest Suffolk

Mostly cloudy. A slight chance of Showers in the Evening, then a chance of Showers after midnight. Lows around 60. East Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

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Holbrook Temperature Statistics

September Temperature

Islip, Long Island Mac Arthur Airport (1.2 miles)

  • Lowest 9 September, 2025

    54 °F

  • Average September

    69.1 °F

  • Highest 6 September, 2025

    81 °F

Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (1.2 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    63.1 °F
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