A dew point measures how much total water there is in the atmosphere. Therefore, it's harder for your body to cool off in the summer by evaporating sweat. So, to sum up: The lower the dew point ...

the relative humidity will quickly drop when the amount of water vapor in the air remains constant. The dew point typically changes much more slowly compared to relative humidity, unless a front ...

The dew point is the temperature the air needs to be cooled to in order to achieve a relative humidity (RH) of 100%. The higher the dew point rises, the greater the amount of moisture in the air.