Pack or skip
Beanie for London in December
Verdict
Pack it
Lows around 37°F — a beanie doubles the perceived warmth for zero grams.
Why
London in December averages highs of 46°F, lows of 37°F, 12 rainy days.
That climate means a beanie earns its space in the bag. Lows around 37°F — a beanie doubles the perceived warmth for zero grams.