what is humidity mean
Humidity is simply the amount of water vapor in the air. The warmer the air, the more water vapor it can hold, which is why tropical areas tend to feel very humid. Relative humidity is the amount of water vapor the air can hold RELATIVE to how much water vapor that air can hold. It is temperature dependent. As air warms and cools, its relative humidity will fall and rise even though the amount of water vapor does not change.