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!