McNab Lake Weather Forecast

    • 73
    • 89

    Slight Chance Thunderstorms

    • 73
    • 89

    Mostly Sunny

    • 74
    • 88

    Chance Thunderstorms

    • 75
    • 88

    Chance Thunderstorms

    • 74
    • 87

    Thunderstorms Likely

    • 72
    • 87

    Thunderstorms Likely

Today 18 Sep Coastal Matagorda

Sunny with a slight chance of Showers. A slight chance of Thunderstorms this afternoon. Highs around 90. Northeast Winds 5 to 10 Mph, becoming southeast 10 to 15 Mph this afternoon. Chance of rain 20 percent.

Tonight 18 Sep Coastal Matagorda

Partly cloudy. Lows in the lower 70s. East Winds 5 to 10 Mph.

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McNab Lake Temperature Statistics

September Temperature

Bay City, Bay City Municipal Airport (18 miles)

  • Lowest 10 September, 2025

    63.1 °F

  • Average September

    78.8 °F

  • Highest 4 September, 2025

    94.5 °F

Climate (2020–Present)

Bay City, Bay City Municipal Airport (18 miles)

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  • Average Low 2020–2025

    61.5 °F

  • Average 2020–2025

    70 °F

  • Average High 2020–2025

    79.7 °F
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