Lavaca Weather Forecast

    • 75
    • 102

    Chance Thunderstorms

    • 73
    • 99

    Chance Rain Showers

    • 74
    • 97

    Chance Thunderstorms

    • 75
    • 98

    Hot

    • 75
    • 102

    Hot

    • 73
    • 99

    Slight Chance Thunderstorms

Today 21 Aug North and Central Sebastian

Mostly cloudy early this Morning, then clearing. A chance of Showers and Thunderstorms early this Morning, then a slight chance of Showers and Thunderstorms this afternoon. Hot with Highs around 101. Northeast Winds around 5 Mph. Chance of rain 40 percent. Heat index Values up to 110 this afternoon.

Tonight 21 Aug North and Central Sebastian

Mostly clear in the Evening, then becoming partly cloudy. A chance of Showers with a slight chance of Thunderstorms. Lows in the mid 70s. East Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lavaca Temperature Statistics

August Temperature

Fort Smith Regional Airport (10.6 miles)

  • Lowest 2 August, 2026

    70.6 °F

  • Average August

    89 °F

  • Highest 18 August, 2026

    109.7 °F

Climate (2021–2026)

Fort Smith Regional Airport (10.6 miles)

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  • Average Low 2021–2026

    54.3 °F

  • Average 2021–2026

    65 °F

  • Average High 2021–2026

    76.4 °F
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