San Marcos Weather Forecast

    • 73
    • 96

    Hot

    • 71
    • 94

    Partly Sunny

    • 71
    • 92

    Partly Sunny

    • 71
    • 93

    Partly Sunny

    • 69
    • 92

    Slight Chance Thunderstorms

    • 68
    • 89

    Slight Chance Thunderstorms

Today 20 Sep Hays

Mostly clear. Lows in the lower 70s. Highs in the mid 90s.

Tonight 20 Sep Hays

Mostly clear. Lows in the lower 70s. Highs in the mid 90s.

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San Marcos Temperature Statistics

September Temperature

San Marcos, San Marcos Municipal Airport (4.3 miles)

  • Lowest 9 September, 2024

    60.1 °F

  • Average September

    80.6 °F

  • Highest 15 September, 2024

    98.1 °F

Climate (2019–Present)

San Marcos, San Marcos Municipal Airport (4.3 miles)

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  • Average Low 2019–2024

    58.8 °F

  • Average 2019–2024

    69.5 °F

  • Average High 2019–2024

    81.4 °F
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