Air temps are not going to have much to do with the rotor temps. Hot rotor temps are upwards of 600-800 degrees. I'll take the PHX heat here to cool this off, and living in a state with cooler temps won't cool them down any faster just further. Like after you park.
I guess if you ran a 'hot lap' in Alaska and parked in a snow bank....then again they'd prob crack! LOL