September always seems to ride the line between super-sticky, sweaty, and hot and crisp, breezy, and ideal for finally breaking out that new jacket we bought before it was actually cool enough to need. Keep your options open, because you can easily go from rocking shorts and an off-the-shoulder top one day to a turtleneck and palazzo pants the next. From lots of layering to go-to transition pieces, we’ve rounded up 30 killer outfits to emulate this September.