Information about humidity

Relative humidity

Percentage ratio between water vapor pressure and saturated water vapor pressure over a clear and even water surface. On this basis it is easy to evaluate how quickly evaporation will proceed or how large is the danger of condensation. The quantity of water vapor which would beneeded for saturation increases within creasing temperature. Similarly there lative humidity of a given air mass falls with increasing temperature. Temperature is therefore an important factor in assessing relative humidity and condensation.

Dew point

The dew point is the temperature at whichwater vapour starts to condense.