Pack or skip
Packable down jacket for Philadelphia in October
Verdict
Pack it
Lows around 47°F — the packable puffer covers 90% of layering needs.
Why
Philadelphia in October averages highs of 66°F, lows of 47°F, 8 rainy days.
That climate means a packable down jacket earns its space in the bag. Lows around 47°F — the packable puffer covers 90% of layering needs.