Marathon Weather Forecast

    • 59
    • 83

    Thunderstorms

    • 59
    • 81

    Partly Sunny

    • 59
    • 83

    Partly Sunny

    • 60
    • 83

    Partly Sunny

    • 61
    • 83

    Mostly Sunny

    • 61
    • 84

    Mostly Sunny

Today 15 Sep Central Brewster County

Mostly sunny. Isolated Showers and Thunderstorms in the afternoon. Highs in the mid 80s. East Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 15 Sep Central Brewster County

Partly cloudy. Lows in the mid 60s. East Winds around 5 Mph.

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Marathon Temperature Statistics

September Temperature

Alpine, Alpine-Casparis Municipal Airport (28.6 miles)

  • Lowest 4 September, 2025

    57.4 °F

  • Average September

    73.7 °F

  • Highest 9 September, 2025

    91 °F

Climate (2020–Present)

Alpine, Alpine-Casparis Municipal Airport (28.6 miles)

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  • Average Low 2020–2025

    51.4 °F

  • Average 2020–2025

    64.5 °F

  • Average High 2020–2025

    77.7 °F
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