Pack or skip
Beanie for Osaka in December
Verdict
Pack it
Lows around 39°F — a beanie doubles the perceived warmth for zero grams.
Why
Osaka in December averages highs of 52°F, lows of 39°F, 6 rainy days.
That climate means a beanie earns its space in the bag. Lows around 39°F — a beanie doubles the perceived warmth for zero grams.