Pack or skip
Beanie for Philadelphia in December
Verdict
Pack it
Lows around 29°F — a beanie doubles the perceived warmth for zero grams.
Why
Philadelphia in December averages highs of 45°F, lows of 29°F, 10 rainy days.
That climate means a beanie earns its space in the bag. Lows around 29°F — a beanie doubles the perceived warmth for zero grams.