Lake Pontchartrain Weather Forecast

    • 72
    • 88

    Mostly Sunny

    • 73
    • 88

    Mostly Sunny

    • 74
    • 90

    Mostly Sunny

    • 74
    • 92

    Mostly Sunny

    • 73
    • 89

    Mostly Sunny

    • 74
    • 88

    Slight Chance Thunderstorms

Today 17 Sep Southeast St. Tammany

Sunny. Highs around 90. Northwest Winds around 5 Mph, becoming southeast this afternoon.

Tonight 17 Sep Southeast St. Tammany

Mostly clear. Lows in the upper 60s. Southeast Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Pontchartrain Temperature Statistics

September Temperature

Slidell, Slidell Airport (11.2 miles)

  • Lowest 8 September, 2025

    63 °F

  • Average September

    77.1 °F

  • Highest 12 September, 2025

    91.9 °F

Climate (2020–Present)

Slidell, Slidell Airport (11.2 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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