Pack or skip
Thermal underwear for Philadelphia in February
Verdict
Pack it
Lows around 27°F — thermals are the difference between a walk and a march.
Why
Philadelphia in February averages highs of 44°F, lows of 27°F, 9 rainy days.
That climate means thermal underwear earns its space in the bag. Lows around 27°F — thermals are the difference between a walk and a march.