I'd be surprised if it would affect the finish unless coming from -30 to a warm environment. I guess it depends on temperature differentials and just how sudden the change takes place. I received my PRS in winter and it was toasty indoors, I stood it on a stand for a couple of hours before tuning it and had no problems other than the strings needed changing because of some sporadic variation in one of the strings in respect of it holding a constant pitch while the note decayed. You could do it in stages, open the package a little and let it acclimatise of your worried about it. I have a guitar student living 10 minutes walk from my house and I wander there with a guitar on a stand once a week and it's pretty damn cold right now, but have had no problem other than the whole tuning alters by a few cents and comes back once at room temp if left alone. I hope you enjoy.
Tim