San Leon Weather Forecast

    • 79
    • 86

    Slight Chance Thunderstorms

    • 78
    • 86

    Mostly Sunny

    • 79
    • 86

    Chance Thunderstorms

    • 80
    • 86

    Chance Thunderstorms

    • 78
    • 85

    Thunderstorms Likely

    • 78
    • 84

    Chance Thunderstorms

Today 18 Sep Coastal Galveston

Mostly sunny with a slight chance of Showers and Thunderstorms. Highs in the upper 80s. Northeast Winds around 5 Mph, increasing to east 10 to 15 Mph in the afternoon. Chance of rain 20 percent.

Tonight 18 Sep Coastal Galveston

Mostly clear. Lows in the mid 70s. Southeast Winds 10 to 15 Mph.

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San Leon Temperature Statistics

September Temperature

Galveston, Scholes Field (14.9 miles)

  • Lowest 10 September, 2025

    75.2 °F

  • Average September

    82.4 °F

  • Highest 2 September, 2025

    87.8 °F

Climate (2020–Present)

Galveston, Scholes Field (14.9 miles)

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  • Average Low 2020–2025

    68.3 °F

  • Average 2020–2025

    73.4 °F

  • Average High 2020–2025

    79.1 °F
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