Pack or skip
Packable down jacket for San Antonio in December
Verdict
Pack it
Lows around 41°F — the packable puffer covers 90% of layering needs.
Why
San Antonio in December averages highs of 63°F, lows of 41°F, 7 rainy days.
That climate means a packable down jacket earns its space in the bag. Lows around 41°F — the packable puffer covers 90% of layering needs.