Pack or skip
Beanie for Washington DC in December
Verdict
Pack it
Lows around 32°F — a beanie doubles the perceived warmth for zero grams.
Why
Washington DC in December averages highs of 47°F, lows of 32°F, 9 rainy days.
That climate means a beanie earns its space in the bag. Lows around 32°F — a beanie doubles the perceived warmth for zero grams.