Upson Park Weather Forecast

    • 75
    • 99

    Hot

    • 75
    • 97

    Slight Chance Thunderstorms

    • 72
    • 96

    Slight Chance Thunderstorms

    • 73
    • 96

    Mostly Sunny

    • 74
    • 97

    Hot

    • 73
    • 97

    Slight Chance Thunderstorms

Today 16 Sep Atascosa

Mostly sunny this Morning, then becoming partly cloudy. Hot with Highs around 101. Southeast Winds 5 to 10 Mph. Highest heat index Readings up to 107.

Tonight 16 Sep Atascosa

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 70s. East Winds 5 to 10 Mph.

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Upson Park Temperature Statistics

September Temperature

San Antonio, Stinson Municipal Airport (13 miles)

  • Lowest 2 September, 2026

    76.6 °F

  • Average September

    90 °F

  • Highest 11 September, 2026

    104.6 °F

Climate (2021–2026)

San Antonio, Stinson Municipal Airport (13 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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