Pack or skip
Packable down jacket for San Antonio in September
Verdict
Skip it
Lows around 70°F — you'll never reach for it.
Why
San Antonio in September averages highs of 91°F, lows of 70°F, 7 rainy days.
That climate means a packable down jacket isn't pulling its weight. Lows around 70°F — you'll never reach for it.