Big Branch Marsh National Wildlife Refuge Weather Forecast

    • 44
    • 62

    Sunny

    • 56
    • 71

    Mostly Sunny

    • 55
    • 71

    Chance Rain Showers

    • 54
    • 69

    Partly Sunny

    • 54
    • 71

    Partly Sunny

    • 54
    • 71

    Partly Sunny

Today 19 Dec Southwestern St. Tammany

Sunny, cooler with Highs in the lower 60s. North Winds 5 to 10 Mph.

Tonight 19 Dec Southwestern St. Tammany

Clear. Lows around 40. East Winds around 5 Mph.

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Big Branch Marsh National Wildlife Refuge Temperature Statistics

December Temperature

Slidell, Slidell Airport (6.2 miles)

  • Lowest 15 December, 2025

    25 °F

  • Average December

    49.9 °F

  • Highest 13 December, 2025

    75.9 °F

Climate (2020–Present)

Slidell, Slidell Airport (6.2 miles)

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  • Average Low 2020–2025

    59.8 °F

  • Average 2020–2025

    69.9 °F

  • Average High 2020–2025

    80.5 °F
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