Lake Austin Weather Forecast

    • 80
    • 92

    Decreasing Clouds

    • 82
    • 92

    Chance Thunderstorms

    • 80
    • 92

    Chance Thunderstorms

    • 79
    • 92

    Chance Thunderstorms

    • 78
    • 92

    Rain Showers Likely

    • 77
    • 91

    Chance Thunderstorms

Today 12 Sep Coastal Matagorda

Mostly sunny. A slight chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the lower 90s. South Winds 10 to 15 Mph. Chance of rain 20 percent. Heat index Values up to 109.

Tonight 12 Sep Coastal Matagorda

Partly cloudy. Near steady temperature in the lower 80s. South Winds 10 to 15 Mph.

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Lake Austin Temperature Statistics

September Temperature

Bay City, Bay City Municipal Airport (13 miles)

  • Lowest 5 September, 2026

    74.5 °F

  • Average September

    83.4 °F

  • Highest 7 September, 2026

    96.1 °F

Climate (2021–2026)

Bay City, Bay City Municipal Airport (13 miles)

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  • Average Low 2021–2026

    62.2 °F

  • Average 2021–2026

    70.7 °F

  • Average High 2021–2026

    80.5 °F
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