I don't think moving a cigar from 70 or so degrees to 50 should have any effect on how it smokes. Nor from 70 degrees to the teens. A quick drop in RH should not matter either.
My guess is that the whole cigar is not at the same humidity. It sounds like the lower RH of 65 is probably not accurate through out the
entire cigar and the wrapper and the binder maybe too dry. As the filler is moister it will expand with heat.
IMHO it's very important that a cigar is stored for a long period of time in optimum conditions before it is smoked in any environment, extreme or not.
I usually age my cigars for three to five years before I smoke them. At least 6 months is enough for most cigars. If the entire cigar is in balance it should smoke well, unless it's a dog rocket to begin with.
I've smoked cigars with zero humidity in the desert at a 100 degrees, 100 percent humidity in the tropics, and zero humidity at 15 below on Mt. Washington. No problems. It's all about the care. Frequent rotation, lots of care for RH, careful temperature control, and lots of love.
As others have mentioned, you may want to stick with a good leathery wrapper from CT on PA. You go out in the cold you put some gloves on heh? Consider a nice maduro wrapper a glove for your cigar.
Wishing you the best of luck.
