Yes, stay North of the Mason Dixon Line. It's cooler.

Just like the roadsters rear window, all the coupes headliners will eventually let go as well. But I think it's more likely to happen sooner than later in the warmer climates.
When the 1st. Roadster rear windows failed, I noticed that most of the reports were from the Southern states, or from cars that originally came from Southern states.
When owners started reporting headliners falling, again it seemed like the biggest majority were from the hotter climates.
I'm wondering if more headliners fail on darker colored cars 1st. since darker colors absorb the heat of the sun, while the lighter colors reflect the suns rays.