Page 182 - "Mississippi in the 1st Person" - Michael James Stone (Demo/Free)

“When temperature drops and reaches the dew point, water will condensate on surfaces, in-
cluding clothes. Damp clothes will cause extra heat loss, not just because of better conduction,

but also because that moisture can evaporate again when coming in contact with the warmer
(relatively dryer) air between the layers of clothing. “

“To the extent that the air holds additional moisture, it will be much more able to take heat

away from your body. All substances have a property called 'specific heat' which is the ability
of that substance to absorb and release heat energy. The water molecule has one of the highest
specific heat ratings, much higher than any other significant gas, due to its angular shape. As

air gets colder, its ability to hold water as vapor decreases, until you get to where precipitation
happens - the dew point. When air with a substantial amount of vapor blows across your skin,

it absorbs heat more readily than very dry air. As noted above, very dry air is always dry - it
just cannot hold much moisture. “

Dew point is the temperature to which air must be cooled to become saturated with water va-

por. When further cooled, the airborne water vapor will condense to form liquid water (dew).
When air cools to its dew point through contact with a surface that is colder than the air, water
will condense on the surface. [1][2] The dew point is sometimes called the frost point when the
[3]
temperature is below the freezing point of water, as frost is formed rather than dew. The
measurement of the dew point is related to humidity. A higher dew point means there will be
[2]
more moisture in the air. WIKI

Humidity : Given that all the other factors influencing humidity remain constant, at ground
level the relative humidity rises as the temperature falls. This is because less vapor is needed to
saturate the air so, vapor condenses as the temperature falls. Dew point temperature is never
[4]
greater than the air temperature because relative humidity cannot exceed 100%.

In technical terms, the dew point is the temperature at which the water vapor in a sample
of air at constant barometric pressure condenses into liquid water at the same rate at which it
[5]
evaporates. At temperatures below the dew point, the rate of condensation will be greater
than that of evaporation, forming more liquid water. The condensed water is called dew when
it forms on a solid surface, or frost if it freezes. The condensed water is called either fog or
a cloud, depending on its altitude, when it forms in the air.

A high relative humidity implies that the dew point is closer to the current air temperature. A

relative humidity of 100% indicates the dew point is equal to the current temperature and that
the air is maximally saturated with water. When the moisture content remains constant and
[6]
temperature increases, relative humidity decreases.

(You have to love the Internet to teach you things after the fact)