I've never ridden there, but in regards to direction . . . check this site out!
http://windhistory.com/station.html?KDIKYou can click the months on the bottom to include or exclude them from the averages. So you could just get the average from July, for instance. Looks like in that month the winds come most likely from SSE or WNW. So probably not a huge difference in which way you ride. The site also has a map view where you can scroll around the country and look at all of the weather stations.... pretty neat.