Originally Posted by
megan
A picture is worth a thousand words they say.
Just a reminder of the obvious: This diagram extends up to the boiling point of water, which is not representative of the real atmosphere. In practice the dew point never exceeds 30C/86F, due to condensation and precipitation processes.
The maximum water vapour content of the atmosphere at sea level is 4%, which puts an upper imit on the correction factors in the density formula.
Anecdotal reports of temperatures of 37C/100F and 100% humidity should be disregarded.