The coldest is a bit after dawn. So the previous dawns should have stress tested it. It should fail when the stress is around maximum under this Hyatt peak theory.
Max rate of change of temperature is sunset and sunrise. Rate of contraction I'd expect similar?
I'm not sure AC would change the thermal mass of a building much. One cubic meter of air weights 1.2kg. Changing the concrete walls would be hard.
A drunk hitting a pole at speed in the carpark would fit perhaps. Drunkenness to an empty carpark would be high.
