San Marcos Municipal Airport Weather Forecast

    • 75
    • 92

    Increasing Clouds

    • 72
    • 93

    Decreasing Clouds

    • 66
    • 90

    Chance Thunderstorms

    • 65
    • 83

    Rain Showers Likely

    • 55
    • 76

    Rain Showers Likely

    • 50
    • 71

    Partly Sunny

    • 53
    • 78

    Partly Sunny

Today 27 Apr Caldwell

Partly cloudy. Highs in the lower 90s. South Winds 5 to 10 Mph.

Tonight 27 Apr Caldwell

Partly cloudy this Evening, then becoming cloudy. Lows in the mid 70s. Southeast Winds 5 to 10 Mph.

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San Marcos Municipal Airport Temperature Statistics

April Temperature

San Marcos, San Marcos Municipal Airport (0 miles)

  • Lowest 7 April, 2026

    48 °F

  • Average April

    70.2 °F

  • Highest 1 April, 2026

    89.1 °F

Climate (2021–Present)

San Marcos, San Marcos Municipal Airport (0 miles)

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  • Average Low 2021–2026

    60 °F

  • Average 2021–2026

    70.7 °F

  • Average High 2021–2026

    82.3 °F
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