Big Branch Marsh National Wildlife Refuge Weather Forecast

    • 64
    • 86

    Mostly Sunny

    • 65
    • 86

    Mostly Sunny

    • 67
    • 84

    Mostly Sunny

    • 70
    • 84

    Partly Sunny

    • 73
    • 84

    Partly Sunny

    • 74
    • 85

    Mostly Cloudy

Today 13 May Southwestern St. Tammany

Patchy fog in the morning. Sunny. Highs in the mid 80s. North Winds around 5 Mph.

Tonight 13 May Southwestern St. Tammany

Mostly clear. Patchy fog. Near steady temperature in the upper 60s. East Winds around 5 Mph.

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  • Temperature Real-Time

Big Branch Marsh National Wildlife Refuge Temperature Statistics

May Temperature

Slidell, Slidell Airport (6.2 miles)

  • Lowest 3 May, 2026

    44.7 °F

  • Average May

    68.1 °F

  • Highest 6 May, 2026

    85.6 °F

Climate (2021–Present)

Slidell, Slidell Airport (6.2 miles)

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  • Average Low 2021–2026

    59.9 °F

  • Average 2021–2026

    70.1 °F

  • Average High 2021–2026

    80.8 °F
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