I have never felt a "noticeable" difference with temperature on the floats. However I do agree that temperature will change the air pressure but is that something that noticeable when you ride or just something that scientifically measurable? I also ride close to a 50 degree difference some times and never readjust the shocks for temp.
You suppose to set the air pressure when the shock is at the temperature you ride at according to Fox. Well I can tell you I don't do that lol. When my sled is not having fun in the snow it lives in a heated 65 degree garage and thats where I adjust or check air pressure . Yes thats wrong if you follow Fox's directions but it works for me and I never take the air pump riding anyways .
Dialing them in is just a matter of setting the air pressure and once you have it where your happy then there is not much to do other then maybe check it from time to time.