Lavaca Weather Forecast

    • 73
    • 99

    Chance Thunderstorms

    • 69
    • 92

    Slight Chance Thunderstorms

    • 66
    • 89

    Partly Sunny

    • 62
    • 89

    Partly Sunny

    • 63
    • 88

    Partly Sunny

    • 64
    • 87

    Mostly Cloudy

    • 65
    • 88

    Partly Sunny

Today 20 Sep North and Central Sebastian

Mostly sunny. Highs around 90.

Tonight 20 Sep North and Central Sebastian

Mostly cloudy with a chance of Showers. A chance of Thunderstorms, mainly this evening. Lows in the lower 70s. West Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lavaca Temperature Statistics

September Temperature

Fort Smith Regional Airport (10.6 miles)

  • Lowest 11 September, 2026

    74.6 °F

  • Average September

    90 °F

  • Highest 4 September, 2026

    106.6 °F

Climate (2021–2026)

Fort Smith Regional Airport (10.6 miles)

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  • Average Low 2021–2026

    54.4 °F

  • Average 2021–2026

    65.1 °F

  • Average High 2021–2026

    76.6 °F
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