Slidell Weather Forecast

    • 70
    • 90

    Mostly Sunny

    • 71
    • 92

    Sunny

    • 74
    • 94

    Mostly Sunny

    • 74
    • 93

    Slight Chance Thunderstorms

    • 73
    • 92

    Chance Thunderstorms

    • 73
    • 91

    Chance Thunderstorms

Today 17 Sep Southeast St. Tammany

Sunny. Highs around 90. East Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 17 Sep Southeast St. Tammany

Mostly clear. Lows in the lower 70s. East Winds 5 to 10 Mph, becoming northeast after midnight.

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Slidell Temperature Statistics

September Temperature

Slidell, Slidell Airport (5 miles)

  • Lowest 13 September, 2026

    72.6 °F

  • Average September

    82.2 °F

  • Highest 15 September, 2026

    93.9 °F

Climate (2021–2026)

Slidell, Slidell Airport (5 miles)

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  • Average Low 2021–2026

    59.9 °F

  • Average 2021–2026

    70.3 °F

  • Average High 2021–2026

    81 °F
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