If you live on the Atlantic side of FL, there is always an ocean breeze to regulate the air. Up north, it gets more hot, more oppressive and more stagnant than in FL.
As to the humidity, we actually have higher humidity here in Hotlanta than we ever had in FL. I would put those white crystals (the chemical name escapes me) in the closets to keep the humidity away from clothing, etc. As long as things are vented properly and you run the A/C, humidity is usually not a problem. ((((((Freezie)))))))
It all is a matter of perspective - and attitude, Freezee.
Consider that in all of America, there was no air conditioning to any degree until after WWII - in the 40's!
That was when refrigeration became a big deal, emerging fully from the literal 'ice boxes' to modern ones - and the introduction of - gasp! - frozen foods!
Those first were stored in a common, public one - then eventually incorporated into the fridge in your kitchen. (No mixes for things - everything was cooked from scratch; but that's another matter.)
No a/c in schools or stores - in other words, we viewed warmth as essential to life and health and well-being, just as you were accustomed to cold as the 'norm' in Vermont, and did not dwell upon that.
In Coral Gables, we prayed for a cold snap when I was little, since the schools did not have heat in them, and if it was near freezing, the radio announced, "No School Today!"
The first snow I ever saw was when I was 19 and in Rochester, NY - stunned that it was so wet, and not like the Ivory Snow Flakes laundry powder with which I was familiar..:))
As dansy said, on the East Coast, there usually is a pleasant breeze to enjoy, and it almost never reached and exceeded 100 degrees. You just took each day as it came - in stride - as you did snowy ones, no doubt.
By the way, later, living in Rochester, NY for two years, the very hottest I ever was, was a week there in the 90+-degree range - very humid - no breeze - and the heat magnified in the Asphalt Jungle.
To get any sleep at all, I had to lie sans clothing under a damp sheet with a fan on full force....and still was uncomfortable.
The reputation of The Deep South as being unbearable is not always deserved. This year, for example, here in my part of South Carolina, there have been only a handful of days that just barely went over 90 degrees - not in the 100's but one time - usually a breeze, and the humidity not excessive.
Nights for three weeks have been in the 60's, and last night 50's!
Comfort sometimes is a question of 'Mind over Matter' - -
if you think in terms of "I'm Uncomfortable," you are bound to be that.