Pack or skip
Winter coat for Washington DC in September
Verdict
Skip it
Lows stay near 64°F — a coat is overkill.
Why
Washington DC in September averages highs of 81°F, lows of 64°F, 8 rainy days.
That climate means a winter coat isn't pulling its weight. Lows stay near 64°F — a coat is overkill.
What to bring instead
Consider packable down jacket instead →
See the pack-or-skip verdict for packable down jacket in Washington DC in September.