Pack or skip
Winter coat for Busan in September
Verdict
Skip it
Lows stay near 66°F — a coat is overkill.
Why
Busan in September averages highs of 77°F, lows of 66°F, 10 rainy days.
That climate means a winter coat isn't pulling its weight. Lows stay near 66°F — a coat is overkill.