Hi Roger,
Depending where in Turkey you are will make a difference.... some areas are quite hot, but heat is not as big a factor as humidity. The wood will swell and shrink with moisture content, and you will want to keep it as uniform as possible without rapid changes so that the wood does all of it's moving evenly across it's mass. When allowed to acclimate slowly, it will get as dry or as wet as it is going to get and be happy until something changes too quickly. Then something is going to give and cracking of the grain is the worst possible outcome.
If I remember from my years there, things would be fairly warm and dry and then some freak monsoon would sweep down from the North and flash flood areas resulting in a Sauna for a couple of days. Or we'd get a Sirocco out of North Africa that would cook you to death with a dry dusty heat.... rapid changes like that are hard on instruments. Humidifiers are inexpensive insurance, and a good case reduces the shock of sudden change. Heck, I saw my first White Christmas in Istanbul!
Take Care;
Doug
"what is this quintessence of dust?" - Shakespeare