Cat Bay Weather Forecast

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    • 68

    Chance Rain Showers

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    Mostly Sunny

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    Mostly Sunny

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    • 67

    Partly Sunny

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    Partly Sunny

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    Mostly Sunny

Today 21 Dec Lower Plaquemines

Mostly sunny. Patchy fog early. A slight chance of Showers Early, then a slight chance of Showers and Thunderstorms. Near steady temperature in the lower 70s. South Winds around 5 Mph. Chance of rain 20 percent.

Tonight 21 Dec Lower Plaquemines

Mostly cloudy. A chance of Showers, mainly in the evening. Lows in the lower 60s. Southeast Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

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Cat Bay Temperature Statistics

December Temperature

Galliano, South Lafourche Airport (23 miles)

  • Lowest 15 December, 2025

    33.3 °F

  • Average December

    55.6 °F

  • Highest 18 December, 2025

    76.5 °F

Climate (2020–Present)

Galliano, South Lafourche Airport (23 miles)

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  • Average Low 2020–2025

    64.3 °F

  • Average 2020–2025

    72.3 °F

  • Average High 2020–2025

    79.8 °F
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