Yep, that's about right for Britain (actually it sounds quite nice for Winter)
In bed, ds wears his vest (pop at the crotch onesie - short sleeves), pyjama top (long sleeve), pyjama bottoms, socks, and his gro-bag.
Daytime - he always has a vest on in Winter (the onesie), and then on top it depends on what we're doing -
Indoors (with the heating on), he'll just have on a long-sleeve top, jeans/warm trousers/tracksuit bottoms, and socks.
Outdoors, long-sleeve top, thick trousers, warm socks, wellies (gumboots in the US?) or trainers, fleece top on top and then either a thick coat on top, or a windcheater (like a wind-proof jacket). Rain or shine, he'll always have a hat on - he doesn't have much hair so his head needs to stay warm. Gloves are a big no-no here, you'd think I was trying to torture him
, but they are good if you can get them to stay on. Like Katie says, a blanket if he's in the pram and not running about. Here's a picture I've posted recently that might illustrate
https://babywhispererforums.com/index.php?topic=76712.msg638739#msg638739.
You can also get little bodywarmers (like padded waistcoats), which are pretty useful.
HTH