Pack or skip
Thermal underwear for Seoul in December
Verdict
Pack it
Lows around 24°F — thermals are the difference between a walk and a march.
Why
Seoul in December averages highs of 38°F, lows of 24°F, 5 rainy days.
That climate means thermal underwear earns its space in the bag. Lows around 24°F — thermals are the difference between a walk and a march.