I think things also depend on you - I mean, how you adjust to things. We used to holiday in May (1st week normally) and would be in the pool every day. When we lived there early May was ludicrous as far as swimming goes, way too cold. The pool wouldn't even be filled until very late June.
In regard to Uzumlu weather, I must say that while I am not one for life up a hill in a village, I'd much prefer Uzumlu's weather. I'd happily trade 5 to 10 degrees off August's temperatures and have a 5-10 degree colder winter.