Downtown (San Antonio) Weather Forecast

    • 77
    • 96

    Slight Chance Thunderstorms

    • 77
    • 97

    Slight Chance Thunderstorms

    • 77
    • 97

    Slight Chance Thunderstorms

    • 77
    • 98

    Hot

    • 77
    • 98

    Hot

    • 76
    • 97

    Hot

    • 76
    • 96

    Hot

Today 4 Sep Bexar

Partly cloudy Early, then mostly cloudy with a slight chance of Showers. Highs in the mid 90s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 4 Sep Bexar

Partly cloudy. Lows in the mid 70s. Southeast Winds 5 to 10 Mph.

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Downtown (San Antonio) Temperature Statistics

September Temperature

San Antonio, Stinson Municipal Airport (6.2 miles)

  • Lowest 2 September, 2026

    77 °F

  • Average September

    91.9 °F

  • Highest 2 September, 2026

    102 °F

Climate (2021–2026)

San Antonio, Stinson Municipal Airport (6.2 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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