Do newborns need footy pajamas?

In my mind yes. It could snow here in March/April when our boy arrives. It has been a while since I cared for a newborn, but do they need footy pajamas? We have one pair of newborn and 6 of 3 month. I am feeling overwhelmed by all these clothes! A lot of the 3 month are the same size as 3-6 month so I don't know how to organize them.