Baby clothes need help from experienced moms!

So I have been buying baby clothes like crazy but only up to 6-9 months. My due date it sept 28 however dr says there is a 30% chance of delivering prematurely. So I don't know if I should even look at 6 months or up much longer.  He is going to take out my cerclage at 36 weeks which is holding my cervix from shortening any further and he thinks that from there if I have t already it will be day by day to see if I go early. So I got SOME newborn, 0-3, 3 months and little 6-9. So should I not buy clothes so far out until I deliver?  I'm worried about getting summer clothes and what if it is winter us know. Anyone go through this before?  I do live in the desert so it helps not to have 4 seasons but still worry.