I ride at 6AM most mornings and just do a 15 mile, 45 min ride. Home for breakfast, a shower and off to work. No problems at all, but I do desk work. If I had to do physical work all day it might be different. I have had to equip my bike with lights and also own a good bit of cool weather gear so I can ride earlier in the spring and later in the fall. I say give it a try. For me it's the only time of the day that is all my own.