What is the difference between Humidity and Relative Humidity?

Humidity and relative humidity are both related to weather and the amount of moisture that air will have. Humidity is made from water vapors. It is measured in grams, and humidity can have a certain amount of air volume or air mass. Humidity is measured over a time frame, while relative humidity is at a specific present moment. The relative humidity is also measured in regard to a certain temperature. To differentiate between the two, a meteorologist may use the initials RH, which stands for relative humidity. Another difference between the two is how they are expressed. Relative humidity would be measured through a percentage, while humidity is expressed through pressure.

Humidity is known to be the amount of moisture that can be found in the air. Usually, humidity can come in the form of water vapors. The measurement will be composed of the grams of water that can be found in a certain mass or volume of air.

The relative humidity is different in the sense that it measures the percentage of the moisture right now as compared to the highest percentage of the moisture that can be found in the air for a given time frame. Take note that there should be a specific temperature that the current temperature should be measured against in order to find out what the relative humidity is.