The mornings are getting colder

It's been in the low 40s in the morning so far this week, but I'm stubborn - I've still been wearing my Chaco sandals. I know, I know, it's October and it's probably time to switch to running shoes for walking and to my Merrell slides for normal footwear. But I'm stretching sandal-wearing season this year. I wonder how much longer I can get away with it... the weather forecast calls for a frost advisory tonight with forecast temperatures in the mid-30s, but the daytime temperatures still warrant sandals. Of course it's possible that tomorrow will be the day of the official shoe switch!