San Antonio Weather Forecast

    • 79
    • 102

    Hot

    • 78
    • 101

    Hot

    • 78
    • 100

    Hot

    • 77
    • 100

    Hot

    • 78
    • 98

    Hot

    • 77
    • 97

    Hot

Today 12 Sep Bexar

Mostly sunny. Hot with Highs around 101. Southeast Winds 10 to 15 Mph.

Tonight 12 Sep Bexar

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 70s. Southeast Winds 10 to 15 Mph.

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San Antonio Temperature Statistics

September Temperature

San Antonio, Stinson Municipal Airport (5.6 miles)

  • Lowest 2 September, 2026

    76.6 °F

  • Average September

    89.8 °F

  • Highest 2 September, 2026

    103.6 °F

Climate (2021–2026)

San Antonio, Stinson Municipal Airport (5.6 miles)

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  • Average Low 2021–2026

    63 °F

  • Average 2021–2026

    73.9 °F

  • Average High 2021–2026

    85.4 °F
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