Funny, I remember coming to NYC from Scandinavia thinking it was so humid and warm and impossible to get anything done during the summer months.
Guess it really depends on what you are used to.
Then, in the winter, the old NYC apartments were so dry and warm because of the central heat that typically couldn't be regulated from the radiators in the apartments. They just blasted on all winter and the only way to adjust the temperature would be to open the windows :-)
In Beijing, we had central CITY heating in the winter. It was so toasty I would open my window whenever the air pollution wasn't took bad.
During the summer, it was hot and humid. Unfortunately, centra AC wasn't a thing, and the wall units would only do so much. Now I live in LA and the weather is mostly perfect.
It is humid and warm in NYC but it hasn't been this year yet. But it will come and the inside of apartments will be amplified.
Most building are side by side with no windows on the side. And unites tend to only have windows on a single side which means it's impossible to get airflow.
As for radiators some can be adjusted but many are binary, either on or off. You could always turn one off for awhile too. They stay warm for quite awhile when off.
Guess it really depends on what you are used to.
Then, in the winter, the old NYC apartments were so dry and warm because of the central heat that typically couldn't be regulated from the radiators in the apartments. They just blasted on all winter and the only way to adjust the temperature would be to open the windows :-)