Climate is the statistics of weather, usually over a 30-year interval. It is measured by assessing the patterns of variation in temperature, humidity, atmospheric pressure, wind, precipitation, atmospheric particle count and other meteorological variables in a given region over long periods of time.
Once you have the saturation vapor pressure and the actual vapor pressure, relative humidity can be computed by dividing the actual vapor pressure by the saturation vapor pressure and then multiplying by 100 to convert the quantity to a percent. (7) Relative Humidity(RH) in percent =(E/Es)*100.
This gas law formula will give you the air density for a given temperature and pressure. Absolute humidity is the density of water vapor in the air (kg/m3). To calculate absolute humidity, you must first use the dewpoint temperature and formula number (6) to calculate vapor pressure in millibars.Then convert the vapor pressure in millibars to Pa by multiplying by 100.f you want to do your own calculations or program a computer, this page contains various formulas used for calculating relative humidity, dewpoint temperature, and other quantities such as air density, absolute humidity, and the height of cumulus cloud bases, which are related to the moisture content of air.