Pack or skip
Winter coat for San Jose in December
Verdict
Optional
Lows around 41°F — a packable puffer covers the cold mornings.
Why
San Jose in December averages highs of 57°F, lows of 41°F, 8 rainy days.
That climate makes a winter coat a judgment call. Lows around 41°F — a packable puffer covers the cold mornings.