We could very well have temps well in excess of 90*F all the way into October. Even if the temp dips into the 80's we still need A/C due to the humidity. It's not unusual to run the AC periodically into November and December, some days switching between heat and AC.
I always wanted to live somewhere that had a true 4 seasons, with a longer spring and fall. I would trade ~10*F of summer heat for a little colder winters. I don't mind winters really, I handle the cold OK. Got down to ~11*F here during Freezemageddon and I worked outside all day for several days.