Mount Sinai Harbor Weather Forecast

    • 70
    • 75

    Slight Chance Rain Showers

    • 70
    • 77

    Chance Rain Showers

    • 64
    • 75

    Rain Likely

    • 63
    • 72

    Chance Rain Showers

    • 63
    • 71

    Slight Chance Rain Showers

    • 62
    • 71

    Slight Chance Rain Showers

Today 21 Sep Northwest Suffolk

Partly sunny. Highs in the mid 70s. Southeast Winds 5 to 10 Mph.

Tonight 21 Sep Northwest Suffolk

Mostly cloudy with a 20 percent chance of Showers. Lows in the upper 60s. Southeast Winds 5 to 10 Mph.

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Mount Sinai Harbor Temperature Statistics

September Temperature

Islip, Long Island Mac Arthur Airport (11.8 miles)

  • Lowest 11 September, 2021

    54 °F

  • Average September

    71.3 °F

  • Highest 13 September, 2021

    84 °F

Climate (2010–Present)

Islip, Long Island Mac Arthur Airport (11.8 miles)

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  • Average Low 2010–Present

    47.4 °F

  • Average 2010–Present

    54.7 °F

  • Average High 2010–Present

    62 °F
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