Unfortunately, if you live somewhere where it gets legitimately hot outside or your commute involves a substantial hill, sweating is non-optional. I work in San Francisco so the weather is good for biking, but my apartment is at the top of a big hill. I do bike to work, but on the way home I often work up a sweat and have to change. However, I did recently order an e-bike which I'm very excited about to avoid that issue!

Copenhagen has the fairly unique advantage of never really getting warm or humid and being basically completely flat.

Copenhagen never getting really warm?!? Last time I was there, it was like 25°!

Exactly, and we get at least 10 of those days every single year.

I can't tell if I am missing the sarcasm in this thread, but 25°C would be considered a cool day in the summer where I live. Today is cool and overcast, and the high is still 28°. Last week it was even hotter.

And that is not even considering humidity. There are some days you can just open your front door and you are immediately sweating.