^ & ^^ are good advice, you're going to be cool when you start out but you'll warm up as you go. You may run into situations, like I did this week, where I went from cool to comfortable within about 15 minutes and then I turned direction and the cool headwind to which I had become acclimated became a non-cooling tail wind and I started to warm up too much and, despite opening my coat, I wasn't really cooling off until about 25 minutes later when I turned again and got a cooling cross wind. There isn't much you can do about this other than to be able to open a layer or two: a pullover wind/rainshell/outer layer doesn't allow you to open it as much as a fully zippered outer layer.