Pack or skip
Winter coat for San Francisco in December
Verdict
Optional
Lows around 46°F — a packable puffer covers the cold mornings.
Why
San Francisco in December averages highs of 57°F, lows of 46°F, 11 rainy days.
That climate makes a winter coat a judgment call. Lows around 46°F — a packable puffer covers the cold mornings.