Port Arthur Reservoir Weather Forecast

    • 72
    • 92

    Becoming Sunny

    • 73
    • 93

    Slight Chance Thunderstorms

    • 73
    • 92

    Slight Chance Thunderstorms

    • 73
    • 91

    Mostly Sunny

    • 74
    • 90

    Slight Chance Thunderstorms

    • 74
    • 90

    Chance Thunderstorms

    • 74
    • 90

    Chance Thunderstorms

Today 15 Sep Lower Jefferson

Partly sunny. A slight chance of Showers and Thunderstorms this afternoon. Highs around 90. Southeast Winds around 5 Mph. Chance of rain 20 percent.

Tonight 15 Sep Lower Jefferson

Mostly clear. Lows in the lower 70s. South Winds around 5 Mph this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Port Arthur Reservoir Temperature Statistics

September Temperature

Beaumont/Port Arthur Southeast Texas Regional Airport (4.3 miles)

  • Lowest 9 September, 2025

    61 °F

  • Average September

    80.4 °F

  • Highest 3 September, 2025

    93.9 °F

Climate (2020–Present)

Beaumont/Port Arthur Southeast Texas Regional Airport (4.3 miles)

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  • Average Low 2020–2025

    62 °F

  • Average 2020–2025

    70.4 °F

  • Average High 2020–2025

    80.5 °F
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