Dew Point or Dew-point Temperature (DP)
Dew Point or Dew-point Temperature (DP) : The temperature to which air must be cooled to reach saturation at a constant atmospheric pressure. The DP is always lower than the wet-bulb temperature which in turn is always lower than the dry-bulb temperature. The only exception to this occurs when the air is saturated (i.e. relative humidity is 100%), in which case all three are equal. Recommended SI unit is degrees Celsius (OC)