Pack or skip
Packable down jacket for San Jose in November
Verdict
Pack it
Lows around 46°F — the packable puffer covers 90% of layering needs.
Why
San Jose in November averages highs of 66°F, lows of 46°F, 6 rainy days.
That climate means a packable down jacket earns its space in the bag. Lows around 46°F — the packable puffer covers 90% of layering needs.