Alison Air Park Weather Forecast

    • 74
    • 97

    Hot

    • 75
    • 97

    Slight Chance Thunderstorms

    • 75
    • 97

    Hot

    • 73
    • 97

    Partly Sunny

    • 72
    • 96

    Partly Sunny

    • 73
    • 96

    Partly Sunny

    • 74
    • 95

    Partly Sunny

Today 21 Sep Guadalupe

Mostly sunny with a slight chance of Showers and Thunderstorms. Near steady temperature in the mid 90s. East Winds 5 to 10 Mph. Chance of rain 20 percent. Highest heat index Readings up to 105.

Tonight 21 Sep Guadalupe

Mostly clear. A slight chance of Showers and Thunderstorms in the evening. Lows in the mid 70s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Alison Air Park Temperature Statistics

September Temperature

San Marcos, San Marcos Municipal Airport (4.3 miles)

  • Lowest 19 September, 2026

    71.1 °F

  • Average September

    85.7 °F

  • Highest 2 September, 2026

    102.9 °F

Climate (2021–2026)

San Marcos, San Marcos Municipal Airport (4.3 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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