– dew point. I know over 65 dew point is gross. But why?
In: Chemistry
All ambient air has some amount of evaporated water in it. The amount of water vapor it can hold varies based on temperature and pressure, and warmer air can hold more water vapor. “Humidity” is referring to the percentage of water vapor the air at its current temperature and pressure can hold, so 100% humidity means that water basically stops evaporating because it can’t hold any more water.
The dew point is the temperature air needs to cool to (assuming constant pressure) to achieve a relative humidity of 100%. If it cools any more water will be forced out of the air in the form of condensation or precipitation. It is generally miserable to be in 100% humidity because you can’t sweat and you will just feel moist all over.
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