It doesn't get anywhere close to 100f in Seattle but you'll still some solid stretches 85+F which, while absolutely peanuts in most places, is pretty brutal for someone used to AC. It is one thing to be brutally hot during the day when you are outside, and an entirely different thing to be rather hot at 3am when you are trying to sleep.
I moved from the Dallas area to the Seattle area and I've had AC everywhere I've lived (except the first place). Sure I've had to install it in one case, but it's not that expensive compared to the benefit if you're used to AC.
Also, I think Seattle wins on weather too, but I lived in the southern heat for a very long time so maybe my perspective is warped.
At least you'd have some pleasant contrast. Walking into your apartment in the summer to be met with air at least as warm as outside is not very cool.
Temperature contrast is vastly underrated, and almost impossible to get in Seattle either way (never gets cold enough in the winter to be that different than a comfortable indoors temperature either).
It doesn't get anywhere close to 100f in Seattle but you'll still some solid stretches 85+F which, while absolutely peanuts in most places, is pretty brutal for someone used to AC. It is one thing to be brutally hot during the day when you are outside, and an entirely different thing to be rather hot at 3am when you are trying to sleep.