They still need pants socks and maybe a beenie but they can be light weight,my family has all summer babies just about, but they are uses to being warm inside us so wrapping them up makes them more comfortable
When we brought my son home august 2013 he wore a full sleeper and hat and covered with a blanket.
The best way my nurses told me to check if the baby was too hot was by feeling the back of their neck. If it seems hot to your fingers then they are too covered up.
I know im wondering how hot it will be once its time to go home i just have 2 size clothes for him some sox a hat so if its too hot i will just put on a sleeper no sox and no hat i want my baby to be comfy not to feel all stuffed up with clothes