Why does temperature accompany high humidity?

Question

... yeah :)

Answer 1

if the temperature were lower, the humid air would condense and form water, and no longer be humid. a common example of this would be dew forming on a summer morning.

Answer 2

Gin is correct in his answer. But then there is the 'high humidity' factor. At standard atmosphere (SA) of 15 degrees Celsius and 1013 hPa pressure, the air can contain a maximum of 14 grams water per cubic meter. The absolute humidity is then 14 grams and the relative humidity is 100%. When the temperature increases, the air can contain more water but the relative humidity will then still be 100%.

What you feel as being humid or not is, in fact, how the cooling effect of the evaporation of your body is felt. If you stand on the beach, wet from swimming, and the air is only 50% saturated, you will feel cold as the water on your skin evaporates. That's because water needs energy in form of heat to go from liquid to gaseous. But if the saturation is 100%, as it would if you were, e.g. in the fog, then there is no evaporation and no cooling down. That happens whatever the actual temperature is.

The principe is used by meteorologists and seafarers in what is called the wet&dry bulb thermometer. It is used to assess the dew point, i.e. the temperature at which the air is 100% saturated with water and can't cool down without condensing it in form of water droplets.