Will this be warm enough?

We're off to Manhattan in just a couple of days. I know, it seems like we were just there. I wonder if we'll ever travel any place else again...in my dreams we'll have an apartment there one day...one day... So! Who can tell me how in the hell to stay warm when it's 10 degrees outside? I'm thinking my Chia hat will be in order. Layers, layers, layers. Any advice?