Can the dew point change quickly over the course of a few hours?
Yes, it can change rapidly, especially if a front moves through. The dew point indicates the amount of moisture in a given air mass. A front, be it cold, warm, stationary or occluded, denotes a boundary between two significantly different air masses. Although the main difference between two air masses is usually the air temperature, sometimes, especially in summer, there may not be much of a temperature difference across a front, but there can be a significant change in the dew point. Learn more about dew point and humidity on this USA TODAY resource page.
