It's not just Illinois. Orion can only be seen in the winter from most places in the northern hemisphere. At that time of year, we re tilted away from the sun (that's why it's winter) and our view of the celestial sphere is different. Only those stars close to the north celestial pole remain visible (although in different positions) throughout the year.
During our summer, Orion is below the celestial horizon for us and never rises. The further south you are the more chance you'll have of seeing it.
During our summer, Orion is below the celestial horizon for us and never rises. The further south you are the more chance you'll have of seeing it.
