Alison Air Park Weather Forecast

    • 47
    • 67

    Sunny

    • 53
    • 77

    Mostly Sunny

    • 56
    • 75

    Partly Sunny

    • 62
    • 78

    Mostly Cloudy

    • 60
    • 79

    Mostly Cloudy

    • 59
    • 79

    Partly Sunny

Today 19 Dec Guadalupe

Sunny, cooler with Highs in the upper 60s. Northeast Winds around 5 Mph, becoming south in the afternoon.

Tonight 19 Dec Guadalupe

Clear. Much cooler with Lows in the lower 40s. North Winds 5 to 10 Mph.

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  • Temperature Real-Time

Alison Air Park Temperature Statistics

December Temperature

San Marcos, San Marcos Municipal Airport (4.3 miles)

  • Lowest 9 December, 2025

    28 °F

  • Average December

    52 °F

  • Highest 13 December, 2025

    80.1 °F

Climate (2020–Present)

San Marcos, San Marcos Municipal Airport (4.3 miles)

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  • Average Low 2020–2025

    59.4 °F

  • Average 2020–2025

    70.2 °F

  • Average High 2020–2025

    81.8 °F
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