Port Arthur Reservoir Weather Forecast

    • 45
    • 72

    Becoming Sunny

    • 53
    • 63

    Mostly Sunny

    • 59
    • 74

    Partly Sunny

    • 57
    • 73

    Partly Sunny

    • 42
    • 67

    Mostly Cloudy

    • 50
    • 61

    Mostly Cloudy

Today 10 Dec Lower Jefferson

Sunny. Not as cool with Highs in the lower 70s. Southwest Winds 5 to 10 Mph, becoming west this afternoon.

Tonight 10 Dec Lower Jefferson

Clear. Lows in the mid 40s. North Winds 5 to 10 Mph.

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Port Arthur Reservoir Temperature Statistics

December Temperature

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

  • Lowest 3 December, 2025

    37.9 °F

  • Average December

    49.2 °F

  • Highest 7 December, 2025

    64 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    62.1 °F

  • Average 2020–2025

    70.6 °F

  • Average High 2020–2025

    80.7 °F
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