The Carter Memorial Airport Weather Forecast

    • 73
    • 99

    Hot

    • 74
    • 99

    Slight Chance Thunderstorms

    • 74
    • 99

    Hot

    • 72
    • 98

    Hot

    • 72
    • 97

    Hot

    • 72
    • 97

    Hot

Today 21 Sep Caldwell

Partly cloudy. Highs in the upper 90s. South Winds around 5 Mph, becoming east in the afternoon. Highest heat index Readings up to 105.

Tonight 21 Sep Caldwell

Partly cloudy in the Evening, then becoming mostly clear. Lows in the mid 70s. Southeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

The Carter Memorial Airport Temperature Statistics

September Temperature

San Marcos, San Marcos Municipal Airport (16.8 miles)

  • Lowest 8 September, 2026

    72 °F

  • Average September

    85.8 °F

  • Highest 2 September, 2026

    102.9 °F

Climate (2021–2026)

San Marcos, San Marcos Municipal Airport (16.8 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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