Humidity in Armenia is basically nonexistent for much of the year. I don't think it's much to be worried about. Though it is something I had to be concerned about when I was in Georgia. My Canon AE-1 has fungus in the viewfinder (came with it), which can easily just be removed and cleaned with the right tools. Lenses are fine, I haven't noticed anything like that. I did notice that in Georgia it grew a bit more.
I'm not too worried about lenses as well since most I collect these days are vintage and cheap. They're easier to take apart and maintain, or simply just replace if they really get bad.