Hi Shady,

I live in NC as well and commute by bike. I would say that it has been relatively nice in the mornings (I leave home around 6:30). Although I do have an available shower at work, I have just been spending a few minutes freshening up at the sink. I reckon as the humidity starts ramping up, the shower will be necessary.

The only advice I have is:

1. You could plan to ride rather slowly. This would inhibit sweating some.
2. Avoid wearing cotton as it retains all of the sweat that you generate. Find something like a "technical Tee" that wicks moisture away.
3. Short hair is certainly easier to manage.

Good luck

-Gary