Pack or skip
Thermal underwear for Zurich in December
Verdict
Pack it
Lows around 30°F — thermals are the difference between a walk and a march.
Why
Zurich in December averages highs of 40°F, lows of 30°F, 11 rainy days.
That climate means thermal underwear earns its space in the bag. Lows around 30°F — thermals are the difference between a walk and a march.