This is especially noticeable in the summer during our monsoon. The closer the dew point and temperature, the more humid or “muggy” it will feel. I like to refer to dew point because it really helps define our “comfort” level. If the air temperature is below freezing, the condensation will appear as frost or ice. If the air temperature and dew point meet on a surface such as a glass or on a leaf, dew will form and you’ll see drops of moisture on the surface. If suspended in air, you’ll see clouds form. In other words, the point at which water droplets form. To put it into numbers, a relative humidity of 50% means the air is holding half of the water vapor it’s capable of holding.ĭew point defines the point at which air will become saturated and condense. So, air with the same amount of absolute humidity will have a higher relative humidity if the air is cooler and lower relative humidity if the air is warmer. Warm air can hold more moisture than cold air. It’s a measure of the actual amount of water vapor in the air compared to the amount of water vapor that can exist in the air at its current temperature. Relative humidity is expressed as a percent and measures water vapor relative to the air temperature. This reading is expressed in grams of water vapor per cubic meter volume of air. The higher the amount of water vapor, the higher the absolute humidity. The National Weather Service defines absolute humidity as the actual amount of water vapor in the air, regardless of the air temperature. Humidity can be discussed in two ways… Absolute Humidity and Relative Humidity. We’ll start with humidity because that’s a term most of us have heard since we were children. Fear not, we are here to help explain!Įxplaining the details of dew point and humidity can get pretty confusing, so we’ll try to provide you with an explanation that is easy to understand. Most people know these terms have something to do with moisture, but a lot of people don’t really understand the terms. (KGUN) - The First Warning weather team often refers to dew point and humidity.
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