Fall: time for foliage, fireplaces, and...fashion emergencies

I am in an endless battle with the weather: every time the seasons change, I just can't seem to get it right. As spring turns to summer, there is the inevitable moment when I find myself sweating rivers on a subway platform in a pair of tights and tall boots. And now, as the long late summer finally turns to fall, I am, in a word, freezing.  Wrong shoes (flats), wrong sweater (short sleeves), wrong jacket (thin cotton). Yet just as surely, I will bundle up tomorrow in a nice warm wool-and-cashmere combo, the sun will come out, and I will melt into a puddle on Seventh Avenue. Can't win.