Pack or skip
Winter coat for Osaka in December
Verdict
Optional
Lows around 39°F — a packable puffer covers the cold mornings.
Why
Osaka in December averages highs of 52°F, lows of 39°F, 6 rainy days.
That climate makes a winter coat a judgment call. Lows around 39°F — a packable puffer covers the cold mornings.