What relationship would you expect to find between the air temperature and dew point temperature at ground level if the area is covered by fog?

Fog formation takes place when the dew point has been 4.5 F lower than the air temperature.

Dew point can be defined as the temperature when the air of the atmosphere has been 100% saturated. The saturation point has resulted in the conversion of the air vapors to the water droplets by the condensation.

There has been a relationship between the dew point and the fog. When the temperature of the air has been reached the dew point, the accumulation of the water droplets results in fog.

For the formation of fog, the dew point has been lesser than 4.5 F from the air temperature.

For more information about the dew point refer to the link:

link

The relationship is a difference in temperature of less than 2.5 °C between air temperature and dew point is noticed when there is fog.

Explanation: