San Marcos Municipal Airport Weather Forecast

    • 73
    • 98

    Hot

    • 73
    • 97

    Slight Chance Thunderstorms

    • 73
    • 97

    Slight Chance Thunderstorms

    • 75
    • 98

    Slight Chance Thunderstorms

    • 75
    • 99

    Hot

    • 75
    • 98

    Hot

Today 10 Aug Caldwell

Mostly sunny. Highs in the upper 90s. Southeast Winds 5 to 10 Mph.

Tonight 10 Aug Caldwell

Mostly clear. Lows in the lower 70s. South Winds 5 to 10 Mph.

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San Marcos Municipal Airport Temperature Statistics

August Temperature

San Marcos, San Marcos Municipal Airport (0 miles)

  • Lowest 5 August, 2025

    70 °F

  • Average August

    85.1 °F

  • Highest 2 August, 2025

    102 °F

Climate (2020–Present)

San Marcos, San Marcos Municipal Airport (0 miles)

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  • Average Low 2020–2025

    59.2 °F

  • Average 2020–2025

    69.8 °F

  • Average High 2020–2025

    81.6 °F
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