Sometimes I see a guy in a sit on my route going pretty fast on a part of my commute on steel Gios road bike. Usually he's a few minutes before me so I don't know if he rides in the crazy hear and humidity because I haven't seen him lately. However, at only 2 miles you might be okay if you take it easy, then again if it's not and humid I'd be sweating just standing outside (actually cooler while riding then waiting at lights).