Lewisburg Weather Forecast

    • 76
    • 93

    Becoming Sunny

    • 77
    • 93

    Slight Chance Thunderstorms

    • 73
    • 89

    Chance Thunderstorms

    • 71
    • 90

    Sunny

    • 74
    • 90

    Mostly Sunny

    • 75
    • 88

    Rain Showers Likely

    • 74
    • 87

    Rain Showers Likely

Today 14 Sep Southwestern St. Tammany

Mostly sunny with a chance of Showers and Thunderstorms. Near steady temperature around 90. Southwest Winds around 5 Mph. Chance of rain 40 percent. Heat index Values up to 111.

Tonight 14 Sep Southwestern St. Tammany

Partly cloudy this Evening, then clearing. Lows in the mid 70s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lewisburg Temperature Statistics

September Temperature

Slidell, Slidell Airport (16.8 miles)

  • Lowest 12 September, 2026

    73 °F

  • Average September

    82.1 °F

  • Highest 1 September, 2026

    93.7 °F

Climate (2021–2026)

Slidell, Slidell Airport (16.8 miles)

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  • Average Low 2021–2026

    59.9 °F

  • Average 2021–2026

    70.3 °F

  • Average High 2021–2026

    80.9 °F
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