Mont Belvieu Weather Forecast

    • 55
    • 64

    Mostly Cloudy

    • 60
    • 69

    Chance Thunderstorms

    • 47
    • 77

    Partly Sunny

    • 51
    • 64

    Mostly Sunny

    • 63
    • 76

    Partly Sunny

    • 63
    • 79

    Mostly Cloudy

Today 16 Dec Chambers

Mostly cloudy. Not as cool with Highs in the mid 60s. East Winds 5 to 10 Mph, becoming southeast this afternoon.

Tonight 16 Dec Chambers

Cloudy. A chance of Showers with a slight chance of Thunderstorms after midnight. Not as cool with Lows in the mid 50s. East Winds 5 to 10 Mph. Chance of rain 40 percent.

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Mont Belvieu Temperature Statistics

December Temperature

Houston / Ellington (23.6 miles)

  • Lowest 2 December, 2025

    39.2 °F

  • Average December

    55 °F

  • Highest 13 December, 2025

    78.8 °F

Climate (2020–Present)

Houston / Ellington (23.6 miles)

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  • Average Low 2020–2025

    63.8 °F

  • Average 2020–2025

    71.5 °F

  • Average High 2020–2025

    79.9 °F
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