Port Lavaca Weather Forecast

    • 81
    • 93

    Chance Thunderstorms

    • 81
    • 92

    Thunderstorms Likely

    • 80
    • 93

    Mostly Sunny

    • 80
    • 92

    Mostly Sunny

    • 81
    • 88

    Mostly Sunny

    • 80
    • 87

    Chance Thunderstorms

Today 16 Sep Coastal Calhoun

Partly cloudy with a chance of Showers. A slight chance of Thunderstorms this Morning, then a chance of Thunderstorms this afternoon. Highs in the lower 90s. East Winds 5 to 10 Mph, increasing to 10 to 15 Mph this afternoon. Chance of rain 40 percent.

Tonight 16 Sep Coastal Calhoun

Partly cloudy. A chance of Showers with a slight chance of Thunderstorms after midnight. Lows around 80. East Winds 10 to 15 Mph, Diminishing to 5 to 10 Mph after midnight. Chance of rain 40 percent.

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Port Lavaca Temperature Statistics

September Temperature

Palacios Municipal Airport (23 miles)

  • Lowest 1 September, 2026

    76.6 °F

  • Average September

    87.6 °F

  • Highest 7 September, 2026

    95.6 °F

Climate (2021–2026)

Palacios Municipal Airport (23 miles)

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  • Average Low 2021–2026

    65.6 °F

  • Average 2021–2026

    73.3 °F

  • Average High 2021–2026

    81.1 °F
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