What is the term for the temperature at which air becomes saturated?

The term for the temperature at which air becomes saturated is known as the dew point temperature. This is significant because the dew point reflects the amount of moisture in the air. When air cools to this temperature, it can no longer hold all of the moisture as vapor, which leads to condensation and potentially the formation of dew, fog, or clouds.

Relative humidity, on the other hand, indicates the current amount of moisture in the air relative to the maximum amount the air can hold at a specific temperature, but does not define a specific temperature at which saturation occurs. The heat index provides a measure of how hot it feels when relative humidity is factored in with the actual air temperature, which is unrelated to the saturation temperature. Saturation pressure refers to the pressure exerted by vapor in equilibrium with its liquid phase at a particular temperature, but again, this is not directly describing the temperature itself. Thus, dew point temperature is the most precise term for describing the point of saturation.