Our bub was born beginning of march. It was still pretty warm..
and for NEWBORN clothes, we basically had:
*about 5 singlets in 000 size(she still wears the same ones now!)
*2 pairs of pants in 0000 size
*2 all-in-one suits 00000 size
*1 t shirt suit in 00000 size
*2 all-in-one suits 0000 size
* a few bonds suits. I think they were 000 size.
*1 cardi in 00000 size

She was 2.9kg and 48cm long and was in 00000 for about 2 months. I would probably buy 0000 and 000 though. Just some simple things. People will give you stuff so dont bother getting to much!

I dont think I actually bought any of the stuff above. It was all given to me on the days after her birth!