Holtsville Weather Forecast

    • 56
    • 67

    Rain Likely

    • 57
    • 69

    Rain Likely

    • 58
    • 70

    Chance Rain Showers

    • 54
    • 71

    Chance Rain Showers

    • 55
    • 71

    Partly Sunny

    • 56
    • 72

    Partly Sunny

Today 28 May Southwest Suffolk

Cloudy. A slight chance of rain in the afternoon. Highs in the mid 60s. South Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 28 May Southwest Suffolk

Rain likely. Lows in the mid 50s. East Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

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Holtsville Temperature Statistics

May Temperature

Islip, Long Island Mac Arthur Airport (3.1 miles)

  • Lowest 23 May, 2025

    46.7 °F

  • Average May

    61.6 °F

  • Highest 11 May, 2025

    78.7 °F

Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (3.1 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    63 °F
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