Port Jefferson Weather Forecast

    • 54
    • 63

    Chance Rain Showers

    • 44
    • 70

    Partly Sunny

    • 45
    • 70

    Mostly Sunny

    • 47
    • 71

    Mostly Sunny

    • 49
    • 71

    Partly Sunny

    • 51
    • 74

    Partly Sunny

Today 23 Sep Shelby

Cloudy. A slight chance of Showers with patchy drizzle this Morning, then a chance of Showers this afternoon. Highs in the lower 60s. East Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 23 Sep Shelby

Cloudy. A chance of Showers in the evening. Lows in the mid 50s. East Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 40 percent.

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Port Jefferson Temperature Statistics

September Temperature

Bellefontaine Regional Airport (14.3 miles)

  • Lowest 14 September, 2026

    50 °F

  • Average September

    73.4 °F

  • Highest 3 September, 2026

    95 °F

Climate (2021–2026)

Bellefontaine Regional Airport (14.3 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    55.7 °F

  • Average High 2021–2026

    64.4 °F
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