San Marcos Weather Forecast

    • 73
    • 96

    Becoming Sunny

    • 75
    • 95

    Partly Sunny

    • 74
    • 95

    Partly Sunny

    • 72
    • 94

    Slight Chance Thunderstorms

    • 70
    • 94

    Partly Sunny

    • 69
    • 94

    Partly Sunny

Today 29 May Hays

Partly cloudy this Morning, then clearing. Patchy fog this morning. Highs in the mid 90s. South Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 29 May Hays

Mostly clear in the Evening, then becoming mostly cloudy. Lows in the lower 70s. South Winds 15 to 20 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Marcos Temperature Statistics

May Temperature

San Marcos, San Marcos Municipal Airport (4.3 miles)

  • Lowest 26 May, 2022

    57 °F
  • Average May

    79.7 °F
  • Highest 21 May, 2022

    99 °F

Climate (2010–Present)

San Marcos, San Marcos Municipal Airport (4.3 miles)

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  • Average Low 2010–Present

    57.2 °F
  • Average 2010–Present

    67.7 °F
  • Average High 2010–Present

    80.4 °F
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