I think your referring to Dew point. When the outside temperature is cool enough for moisture in the air to condense on the ground. That has to do with humidity and ambient air temperature
condensation
Condensation :)
Condensation occurs when water vapor in the air comes into contact with a cold surface, such as a glass of iced tea, causing it to condense into liquid water droplets on the outside of the glass.
Dew
It's condensation
Changing a liquid to gas is called evaporation.
condensation
Condensation and fingerprints.
Condensation
Condensation
The jet trails across the sky were caused by condensation. The condensation of the water on the outside of the glass left a ring on the table. The condensation fogged up his glasses when he walked into the house.
condensation