John J. Stokes San Marcos River City Park Weather Forecast

    • 69
    • 94

    Increasing Clouds

    • 69
    • 94

    Mostly Sunny

    • 70
    • 94

    Mostly Sunny

    • 71
    • 94

    Mostly Sunny

    • 69
    • 94

    Chance Thunderstorms

    • 68
    • 89

    Chance Thunderstorms

Today 18 Sep Hays

Mostly sunny in the Morning, then becoming partly cloudy. Highs in the lower 90s. Southwest Winds around 5 Mph, becoming southeast around 5 Mph in the afternoon.

Tonight 18 Sep Hays

Partly cloudy in the Evening, then clearing. Lows in the upper 60s. South Winds around 5 Mph.

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John J. Stokes San Marcos River City Park Temperature Statistics

September Temperature

San Marcos, San Marcos Municipal Airport (3.7 miles)

  • Lowest 9 September, 2025

    61 °F

  • Average September

    81.2 °F

  • Highest 4 September, 2025

    102 °F

Climate (2020–Present)

San Marcos, San Marcos Municipal Airport (3.7 miles)

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  • Average Low 2020–2025

    59.2 °F

  • Average 2020–2025

    69.9 °F

  • Average High 2020–2025

    81.6 °F
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