You guys are a lot smarter then me. Cold air being denser explains a lot. Now, we've been having an extended season here in northern NY, temps in the 40's by 10 am, rising to low 50's by noon all week. I've been telling my wife that 45-50 degrees feels so much colder in late fall then it does in late April/early May. Don't know why it is but I'm wearing lots more clothing now then I would be in the spring. Sun is lower, leaves and greenery gone is all I can come up with. Is this real, or imaginary?