I was thinking of one of those environmentally controlled rooms where they keep the acoustics in some of the music stores. :)

In general, I suspect it will be ok if there are no rapid changes in environment.

I just read this: http://www.acousticfingerstyle.com/CareAndFeeding.htm

And this was interesting.

http://www.santacruzguitar.com/care/index.html

Temperature Damage
High temperatures, generally above 100 degrees, cause glue joint failure and softening of the lacquer, making it susceptible to damage.

Low temperatures, generally below freezing, cause lacquer to craze and check. One very important point to remember, rapid changes cause far worse damage than the exposure to extremes if the changes take place slowly, with the instrument having plenty of time to acclimate. When, for instance, an instrument has been transported or shipped in the winter, it may well have been exposed to extreme cold. It is best to wait overnight before opening the box. I have seen guitars arrive at a destination, get checked for damage, find none, and then the next day found the lacquer checked and crazed. In these cases the guitar was very cold to the touch when examined. This wouldn't have happened if the instrument hadn't been subjected to thermal shock. If it had been left insulated in its case and the box for at least 12 hours, it could have been opened without damage resulting.