what is dewpoint

The dew point is the temperature to which air must be cooled, at a constant pressure, for it to become saturated with moisture, resulting in 100% relative humidity. When the air cools to this temperature, water vapor in the air condenses into liquid water, forming dew, fog, or frost if the temperature is below freezing. Dew point is a key indicator of humidity and moisture content in the air and is more consistent than relative humidity, as it remains constant regardless of temperature changes. A higher dew point means the air contains more moisture, making it feel more humid, while a lower dew point indicates drier air. Dew point is widely used in weather forecasting and various industrial applications to predict condensation and assess comfort levels in the environment.