I am finding, that as a rule, any cues shipped from the east coast to me in WA seem to fair nicely. At least in the spring, summer, and fall months, the relative humidity is fairly consistent between the two regions.
Now, cues coming from a more arid region, say the southwest, do not fair as well with the humidity change. I had a cue arrive that was straight, and within 24 hrs, had developed a wobble. Upon the advice of a cue maker, I took the butt and shaft out of the case, and slip-knotted fat rubber bands onto the pin and ferrule respectively, and then hung them, counter-balanced, from a hanger for 3 days in the side of the archway in my living room, and let gravity do it's work. 3 days later, the butt rolled straight again, the shaft had a little wobble, but nothing major. It has remained unchanged ever since.
From here on out, when I know I will be receiving a cue from an arid region, I will use the above technique to allow it to acclimate before playing. There are no guarantees with this method, because afterall, you are dealing with wood, which can be temper-mental.
Lisa