Slidell Weather Forecast

    • 70
    • 92

    Mostly Sunny

    • 68
    • 90

    Chance Thunderstorms

    • 68
    • 87

    Chance Thunderstorms

    • 70
    • 90

    Partly Sunny

    • 69
    • 90

    Chance Rain Showers

    • 65
    • 85

    Chance Rain Showers

Today 17 Sep Wise

Sunny. A 20 percent chance of Showers in the afternoon. Highs in the lower 90s. Southwest Winds around 5 Mph.

Tonight 17 Sep Wise

Partly cloudy in the Evening, then becoming mostly clear. Lows in the upper 60s. South Winds around 5 Mph.

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Slidell Temperature Statistics

September Temperature

Decatur, Decatur Municipal Airport (13 miles)

  • Lowest 6 September, 2025

    59.9 °F

  • Average September

    77.3 °F

  • Highest 4 September, 2025

    95.2 °F

Climate (2020–Present)

Decatur, Decatur Municipal Airport (13 miles)

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  • Average Low 2020–2025

    56.5 °F

  • Average 2020–2025

    66.4 °F

  • Average High 2020–2025

    76.8 °F
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