Pack or skip
Beanie for Chicago in December
Verdict
Pack it
Lows around 22°F — a beanie doubles the perceived warmth for zero grams.
Why
Chicago in December averages highs of 36°F, lows of 22°F, 11 rainy days.
That climate means a beanie earns its space in the bag. Lows around 22°F — a beanie doubles the perceived warmth for zero grams.