San Antonio International Airport Weather Forecast

    • 78
    • 98

    Slight Chance Thunderstorms

    • 78
    • 99

    Hot

    • 77
    • 98

    Hot

    • 77
    • 99

    Hot

    • 77
    • 100

    Hot

    • 77
    • 100

    Hot

Today 7 Sep Bexar

Mostly sunny this Morning, then partly cloudy with a slight chance of Showers and Thunderstorms this afternoon. Highs in the upper 90s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 7 Sep Bexar

Mostly clear. Lows in the mid 70s. Southeast Winds 5 to 10 Mph.

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San Antonio International Airport Temperature Statistics

September Temperature

San Antonio, San Antonio International Airport (0 miles)

  • Lowest 1 September, 2026

    78.7 °F

  • Average September

    88.3 °F

  • Highest 2 September, 2026

    100.7 °F

Climate (2021–2026)

San Antonio, San Antonio International Airport (0 miles)

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  • Average Low 2021–2026

    62.4 °F

  • Average 2021–2026

    72.3 °F

  • Average High 2021–2026

    83.5 °F
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