I am traveling from the UK to USA for a few months, my first stop being New York City for a few weeks over Christmas and New Years.
Generally speaking, what is the weather like? What would be appropriate clothing? I think it snows often, so I was assuming some waterproof shoes / boots would be sensible at least.
Wind protection, the wind can really whip intensely between buildings
Good, non-slip, ice-friendly shoes. They might clean the streets daily, but all of the ice gets packed onto the sides, crossing the street can be treacherous. Ice puddles, slush. Sidewalks are not cleaned very diligently after a snow / ice storm. So you have to be mindful of your footing
Have layers, so that you can go from the icy outside, to the burning hot inside of buildings quickly.