What clothes should I have ready for baby in April? (I'm guessing they could come late March or early April, and we live in the Northeast). To be more specific, I guess I'm wondering if I should have some sweaters/pants/shoes in addition to onesies? Also, how much should I have in newborn size v. 0-3 month size?
Any guidance you can offer would be much appreciated!

Sorry if this has already been discussed..I searched and didn't find anything.
Re: What clothes should I have ready for baby?
In *my* case, in the Southeastern part of the United States, April is usually warm but not unbearable. I have some footed sleepers as well as some onesies and pants. I also have some sleep gowns. Baby isn't going to be outside playing all day obviously so really it's mostly dependent on how you keep the temps inside your home.
eta: I don't know about nb vs 0-3 month quantity. Keep in mind, nb size is typically 7-10 lbs. If you have a 9lbs baby, they're not going to be in nb very long. Or if your baby is really long, may not be in nb very long.
From experience, my 8lb 4oz DS was SWIMMING in 0-3s for the first couple of weeks, but after that he wore 0-3 pretty consistently and he went through sizes as expected. Not all babies do that either though.
As far as seasonally appropriate clothing is, I don't know much about weather trends in your area. It's such a crapshoot in the Midwest as to when spring will actually start (like today it's 55*, but usually it's like 20-30* this time of the year).
Babies don't need shoes, just socks. I would have some pants and jacket/long sleeve options available. If you're just hanging at home mostly, onesies and sleepers that zip are most convenient, and blankets are always easy to use if it feels too cold. Layers that are easy to remove when you go out are handy that way you can adapt to temps.
Hope this helps a bit maybe! :P
I live in the Midwest, this is what I have currently washed and put away in her room:
Cotton and fleece sleepers: NB, 0-3, and 3-6
Onsies: NB, 0-3, and 3-6
Sleepsacks (cotton and fleece): NB, 0-3, 3-6, 0-9
Leggings: NB, 0-3, and 3-6
Extra pieces for layering: NB, 0-3, 3-6
Blankets (Cotton, wool, fleece)
Socks and hats
DS was in NB for a few weeks (was 7#10oz at birth), so I have a handful of NB sized items, but I have more 0-3 items since those will likely be worn longer. I didn't have any NB with DS, and had to run out and get a few onsies and sleepers for him. I didn't bother with any outfits (though I should have had a NB sized outfit for his take home outfit, he was swimming in the 0-3 outfit).
https://babyli.st/g/how-many-baby-clothes-do-i-need
My DS hated his feet and legs to be messed with so footed PJs did not go well. We liked the snap up PJs with socks
Also a halo sleep sack. I got one fleece and one cotton for each age bracket until he started standing.
Miscarriage 3/15 at 10 weeks
BFP 7/23/15 EDD 4/3/16
0-3 items are much bigger than NB. I discovered that with DS, ha! Some babies bypass NB and some can be in it for a few weeks before 0-3's fit better.
My best advice is to only un-tag and wash one set of onesies and matching pants and one set of sleepers of each size (NB, 0-3 and 3) to have ready for their first week and leave the tags on the rest and keep receipts handy. Then if you have a bigger baby who skips the NB or 0-3 sizes you can return/exchange them. The nice thing about baby clothes being so tiny is that a load of laundry covers a LOT of clothes, so you can likely do their whole wardrobe in one load once you know how big your LO is.
Also, if you happen to have a long and skinny like me, these are great for helping onesies fit better - https://www.etsy.com/transaction/251427641
I have both warm and cold options for 0-3 months just in case baby goes right in this size at birth or if she doesn't fit this size until May.
I wish baby sizes were easier to predict!
i got the bulk of onsies and footed PJs for the first 9 months, pants, mittens, hats and socks for baby. I also got 3 velcrow swaddle blankets from SwaddleMe (I heard 3-4 is enough). I think the only thing I need is the side snapping NB undershirts (for baby till the umbilical cord falls off). I'll probably get those at TJ Maxx or the like. This is what it looks like organized by month & type (NB, 0-3, 3, 6, 6-9)
Here's a list my fellow mom gave me. Her son turns 1 this month;
DD1 was in NB for about 3 months, but she's super petite. 0-3 stuff never really fit her right and we basically skipped it.
One thing we did with DD1 is we had a few NB leggings, but then went straight to 6 month leggings and just rolled the bottoms up. Since she was pretty much immobile for the amount of time she fit in those there really wasn't a whole lot of wear and tear on them and we saved a little money.
My other favorite item was kimono shirts for when she first came home until her cord fell off. They stay off of the cord pretty well and since it's just a tee diaper changes are super easy. Personally I liked not having to deal with crotch snaps all the time.
This is more of a psa. There is no time limit on returns to Carter's as long as tags are on and you have a receipt. DH and I have gotten in the habit of scouring clearance for items we think will be seasonally appropriate and fit later on. Once you kind of know how your kid sizes up (bigger, smaller, wears their age) you can save some serious money. If you were wrong, no harm done. Babies also don't care if they're wearing last years styles.