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Humidity
Humidity is the amount of moisture, or water vapor, in the air. Usually, the humidity level is reported in RELATIVE HUMIDITY, which is the amount of humidity in the air compared to how much the air can hold. When air is 100 percent relative humidity, the air molecules are completely SATURATED, which means they can't hold any more water vapor.
Dew Point
Water droplets, called DEW, form on grass early in the morning. Dew is formed when water condenses from the air. The DEW POINT is the air temperature at which dew forms on surfaces. The dew point depends on both the amount of water vapor in the air and the air pressure.