I live in AZ... Yesterday was into upper 90's w/ 58 % humidity (high for AZ). The detail job I did before that was about 105.
Here is the thing, you need to time your steps. If it's your own vehicle, see if you can do the wheels, wash, and clay in the evening, put the vehicle in the garage. By next morning, while temps are still low, start your polishing. Hopefully you'll complete that step sometime before the temps exceed 95. Here is where *it depends*, if your LSP is a sealant or wax, feel free to apply. If you're dealing with a coating, you may want to wait until the next morning to apply before the temps creep up. Although, I have to say CQUK 3.0 is pretty good in hot temps.
Hope this helps.