humidity
[U] Uncountable
This term describes a heavy, clinging sensation in the air that often makes temperatures feel higher than they actually are. It evokes the feeling of skin that refuses to dry or breath that feels thick and oppressive. While moisture is a general term for any liquid water, humidity specifically refers to the gaseous state of water in the atmosphere. It is most frequently used in weather reports or when complaining about the discomfort of a tropical climate.
Used exclusively to describe the atmospheric condition or the measurement of water vapor in the air.