Does humidity sink or rise?

Question

I've been wondering about this for a long time :)

Answer 1

Humidity can be measured in two different ways:

Absolute humidity. At the average temperature of 15 degrees Celsius, one cubic meter of air can't contain more than 14 grams water. The absolute humidity is then 14 gr/m3.

Relative humidity. At the above, the air has reached its dew point; the relative humidity is then 100 percent.

If the temperature sinks, the absolute humidity must sink and excess water condense as droplets. The relative humidity is still 100 percent.

If the temperature rises, the absolute humidity remains the same but the relative humidity diminishes. In a desert or in polar regions it can be as low as 30 percent relative humidity.

Answer 2

Humidity is a measure of how much moisture is in the air.  Having water molecules in the air would make the air heavier - so humid air  would sink.

Answer 3

Well, humidity is usually heat. Heat rises. Question answered!

<3 Hope this helped!