2012 Honda Civic blows out hot air?

So I have this problem when I driving and the air conditioning is not on I feel heat coming out of the vents. I usually notice this when the windows are down but i usually keep the temperature knob on cold. The car has 50 thousand miles. Any way to make this stop? Its quite annoying when its already 100 degrees outside lol

Added (1). The fan is turned off as well

Your car is setup to allow some air to move through it at all times so there's little you can do to stop it. Why not just change the port in which the air is coming out to like the floor where you won't need to get yourself all fussed up.