Q&A for How to Calculate Humidity

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If it is raining heavy (like in the outer parts of a hurricane), shouldn't the humidity level be 100%?

Donagan

Top Answerer

Not necessarily. The presence of lots of rain doesn't tell us for sure what the humidity is. Humidity refers to the air's water content, which is sometimes invisible.

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What is the ideal humidity on a gauge?

Community Answer

You will have to use a thermo and calculator and follow the steps. First measure the temperature, then wind pressure, and then divide them.

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Is there any particular name for that temperature difference between wet and dry bulbs?

Community Answer

The difference between dry bulb and wet bulb temperature is called wet bulb depression. Likewise the difference between temperature and dewpoint is referred to as the dewpoint depression.

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How do you calculate relative humidity from temperature?

Drew Hawkins1

Community Answer

In order to calculate relative humidity using the temperature, you must also know the dew point temperature. Take the air temperature and dew-point temperature in Celsius and calculate the saturated vapor pressure using a special formula. Then, you'll need to find the actual vapor pressure by using the same formula, but swapping out the air temperature for the dew point temperature. Once you have those 2 values, you can use another formula to calculate the relative humidity.

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Question

How is dew point temperature calculated?

Drew Hawkins1

Community Answer

The dew point temperature is the temperature at which the air is saturated with water vapor, and it's measured with a device called a hygrometer. A hygrometer uses a shiny, mirror-like surface to collected water vapor. The device then gives a value that tells you the dew point temperature.

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What is difference between humidity and dew point?

Drew Hawkins1

Community Answer

The dew point is the temperature at which the hair is fully saturated with water and is based only on the amount of moisture in the air. The relative humidity is a certain percentage of saturation at a given temperature, so it relies on both moisture content and the air temperature.

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