Port Arthur Weather Forecast

    • 75
    • 88

    Partly Sunny

    • 75
    • 87

    Decreasing Clouds

    • 76
    • 90

    Mostly Sunny

    • 77
    • 90

    Mostly Sunny

    • 78
    • 89

    Chance Rain Showers

    • 77
    • 88

    Rain Showers Likely

    • 75
    • 87

    Rain Showers Likely

Today 25 Sep Lower Jefferson

Partly sunny. A chance of Showers in the Morning, then Showers likely with a chance of Thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 60 percent.

Tonight 25 Sep Lower Jefferson

Partly cloudy. Lows in the lower 70s. East Winds around 5 Mph.

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Port Arthur Temperature Statistics

September Temperature

Beaumont/Port Arthur Southeast Texas Regional Airport (6.8 miles)

  • Lowest 19 September, 2026

    73.7 °F

  • Average September

    84.8 °F

  • Highest 22 September, 2026

    97.6 °F

Climate (2021–2026)

Beaumont/Port Arthur Southeast Texas Regional Airport (6.8 miles)

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  • Average Low 2021–2026

    62.6 °F

  • Average 2021–2026

    71.3 °F

  • Average High 2021–2026

    81.4 °F
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