The act of looking
outside of your window and determining if it is a
cold enough
day to wear a sweater, jacket or just a t-shirt. It is determined by the amount of sunlight that is shining onto the ground and the amount of fog on your window.
Person 1: Hey dude do you think I need a jacket for when we go
outside?
Person 2: Let me use my eyemometer and find out......no we
don't need a jacket it's perfect
outside.