Dew point is the temperature at which water vapour content in air reaches the maximum point. Dew PointĪpart from understanding the various units for humidity, you should also learn about dew point. Relative humidity can be 100% in many cases, especially during the monsoons when air is saturated with moisture. Therefore, the figure remains constant, even with changes in pressure and temperature. Specific humidity remains constants as long as moisture in the air is not removed or added. This means that such humidity is expressed as the amount of water vapour (in grams) present in each kilogram of air. Thus, the specific humidity unit is g/kg. The only difference is that instead of considering air volume, this calculation considers the total air mass. Specific humidity is a measurement method, which is similar to the absolute method. RH = Existing water vapour/Maximum water vapour x 100 SolutionĪH = Grams of water vapour/ cubic metres of air Calculate relative humidity and absolute humidity. This volume of air can hold a maximum water vapour content of 25 grams. 22 grams of water vapour exist in 6 m 3 of air. Doing so eases comprehension significantly. Weather forecasts in the news also tend to report humidity predictions in the relative humidity format. This is the most common method used as a measure of humidity. From this, they can easily derive the relative humidity (RH), through the following formula – Now consider, weather analysts determine that at present the air holds 8g/m 3. Suppose the air is capable of holding 10g/m 3 of water vapour. In most cases, relative humidity unit is expressed in percentage. Relative humidity refers to the amount of water vapour present in the air relative to the maximum water vapour that it can hold. Therefore, other forms of unit for humidity are more popular. While scientifically accurate, this unit of measurement is difficult to understand for the general population. In such a case, you can say that the absolute humidity is equal to 3.5 grams/m 3. Your measurements reveal that 7 grams of water vapour exist in 2 cubic metres of air. Due to such a direct and specific approach, this humidity measurement unit is the most scientifically accurate method.Ībsolute humidity unit is expressed in grams per cubic metre of air. In this form of measurement, you can consider the mass of water vapour present in a particular volume of air. Nevertheless, before learning the humidity unit, you must learn about the various ways in which humans measure humidity. Since humidity is a measurable entity, there is a SI unit of humidity.
Humidity, combined with high temperatures, can increase the distress caused due to heat. Have you ever wondered what humidity means? Humidity is nothing but the measure of water vapour in the air. You may have often heard people remark that the humidity is unbearable.