Long Island Weather Forecast

    • 67
    • 75

    Chance Thunderstorms

    • 63
    • 78

    Partly Sunny

    • 60
    • 68

    Partly Sunny

    • 60
    • 66

    Mostly Sunny

    • 64
    • 72

    Mostly Sunny

    • 63
    • 73

    Partly Sunny

Today 3 Sep Suffolk

Mostly Cloudy, then becoming partly sunny. A chance of Showers and Thunderstorms. Patchy fog. Highs around 80. Southwest Winds 5 to 10 Mph. Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 3 Sep Suffolk

Partly cloudy. Patchy fog. A chance of Showers with a slight chance of Thunderstorms in the evening. Humid with Lows in the mid 60s. West Winds around 5 Mph. Chance of rain 30 percent.

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Long Island Temperature Statistics

September Temperature

Boston, Logan International Airport (3.1 miles)

  • Lowest 1 September, 2026

    64.9 °F

  • Average September

    66.6 °F

  • Highest 1 September, 2026

    69.1 °F

Climate (2021–2026)

Boston, Logan International Airport (3.1 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    61 °F
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