You can get it from any Biletix store in town or come to concert area for like 2-3 hours before the show and get it printed from the entry.
http://www.biletix.com/saleschannelretail/TURKIYE/en
There you go, if it won't help, you can contact me
I'm sure that it is not going to be quite cold, I've been living here for six years Make sure to wear a coat and take an extra hoodie with you(to wear-in if it starts to rain or etc.) it will be okay
+ ready to help visitors with any questions