I have a screened in patio at my house, and i was wondering if i hung a deer mount out there if it would be ok. The mount will be about 12 feet off the ground, so im not afraid of anything getting at it.

But im afraid the changing weather conditions will affect it.
I live in ky and the temperatures range from 0 Degrees in the winter to 100 Degrees in the summer.
Also, it is very humid here. would that have any affect?

Would it be ok to put a mount out there, or would it damage the mount?

Do not put your mount through those conditions and expect it to last. Keep it climate controlled and it should last a lifetime.