Ha, "extreme" cold to someone in TX, what's that, 50?
Just teasin'. I'm sitting at 28 tonite, I've torched colder, and the way my ventilation is set up I might as well be outside. I'd rather be cold than fume sick.
I don't think you have anything to worry about. Glass doesn't seem to care. I don't even preheat rods in the kiln, just wave them in front of the flame a bit. I've never noticed any kind of reaction different than when it's high noon in July either. Just stick your work in your kiln as usual.