John J. Stokes San Marcos River City Park Weather Forecast

    • 73
    • 96

    Increasing Clouds

    • 75
    • 94

    Chance Rain Showers

    • 75
    • 95

    Rain Showers

    • 72
    • 89

    Rain Showers

    • 69
    • 82

    Rain Showers Likely

    • 69
    • 82

    Rain Showers Likely

    • 68
    • 81

    Chance Rain Showers

Today 28 Sep Hays

Mostly cloudy with a 40 percent chance of Showers. Highs in the upper 70s.

Tonight 28 Sep Hays

Partly cloudy. Lows in the lower 70s. Southeast Winds 5 to 10 Mph with Gusts up to 20 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 20 September, 2026

    70 °F

  • Average September

    85.3 °F

  • Highest 2 September, 2026

    102.9 °F

Climate (2021–2026)

San Marcos, San Marcos Municipal Airport (3.7 miles)

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  • Average Low 2021–2026

    60.2 °F

  • Average 2021–2026

    71 °F

  • Average High 2021–2026

    82.6 °F
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