I'm a southern NJ palm fancier. I've got one palm that is my pride and joy. 6' tall and getting ready to bloom for the second year in a row. It typically gets down to 5 degrees as a minimum temperature.
Winters are long and cold.
This year was no exception. Besides a little damage from the weight of the snow all is well. In fact, in the neighborhood there are some very nice species in gardens. Even my Chamaerops thrives without any protection. For Phoenix species and banana however, winter protection is needed.