Q:

Can warm air hold more water vapor than cold air?

A:

Quick Answer

Warm air can hold more water vapor than cold air. The higher the temperature of the air, the greater the capacity it has to hold water vapor.

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Full Answer

Relative humidity is the amount of water vapor in the air in comparison to what the air can hold. A relative humidity of 40 percent means that the air is only 40 percent saturated with moisture and can hold more water vapor.

In general, for each 20 F decrease in temperature, the relative humidity doubles. This means that as the temperature goes up, the relative humidity decreases; in other words, with the same amount of water vapor, cold air is more saturated than warm air.

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