We usually have a thread somewhere about when you make the decision to finally turn the heat on as the days get colder.
So it's been getting down to the 40s at night here, but the inside of the house is staying around 59, so I've just been layering on more clothes.
My yearly goal is to wait until at least October 15 before turning on the heat, although there have been a few years where I haven't made it. And once I hit October 15, I try for November 1.
This year, I think I'll get to the 15th, but it's been so chilly, I may just have to turn the heat on in the evenings before we get to November.
What's the weather like where you are?