I regularly rode when it was over 100 degrees. It honestly was not a problem. I know a lot of drivers find this hard to believe, but it's true.
- Being in good shape reduced how much I sweat in the first place. If an average driver started cycling, they'd see a reduction in how much they sweat from getting in better shape alone.
- I would wear lightweight clothes for my commute and change when I got to work.
- On hotter days, I would wet down my shirt and a stocking I wore on my head. That water would evaporate, making sweating unnecessary. If the water evaporated prematurely, I found that a small spray bottle would work great to add back water and avoid sweating. (If it's too humid, this won't work, obviously, but I didn't find the humidity in Austin to be a problem.)
- Don't ride too fast.
- My ride wasn't longer than 15 minutes. Obviously, the longer the ride, the more sweat. I found that even on 100+ degree days, I would only slightly sweat given the other things I did.
- If I did sweat, I'd wipe the sweat off with a bandana or rag and then splash water on myself to freshen up. If you do splash water on yourself, dry yourself off before going to see coworkers as some assumed that I was sweating profusely when I wasn't.
- A bike commute naturally places going to work at a cooler part of the day, the morning. I don't care if I'm sweaty when I get back home.
- Also, getting a little sweaty isn't that bad. A lot of people seem to think that sweating automatically makes you smell terrible. But that hasn't been my experience. Yes, getting extremely sweaty can smell terrible and feel grimy too, but mild sweat is pretty normal and happens to people who are walking outside for a few minutes when it's hot.