Alamo Weather Forecast

    • 77
    • 102

    Hot

    • 75
    • 101

    Chance Thunderstorms

    • 76
    • 100

    Slight Chance Thunderstorms

    • 76
    • 100

    Hot

    • 75
    • 100

    Hot

    • 76
    • 99

    Hot

Today 26 Aug Hays

Mostly sunny. Hot with Highs around 101. South Winds around 5 Mph.

Tonight 26 Aug Hays

Mostly clear. Lows in the mid 70s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Alamo Temperature Statistics

August Temperature

San Marcos, San Marcos Municipal Airport (5 miles)

  • Lowest 23 August, 2026

    69.1 °F

  • Average August

    86.8 °F

  • Highest 20 August, 2026

    102.9 °F

Climate (2021–2026)

San Marcos, San Marcos Municipal Airport (5 miles)

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  • Average Low 2021–2026

    60.1 °F

  • Average 2021–2026

    70.9 °F

  • Average High 2021–2026

    82.5 °F
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