- Relative humidity is also directly tied to the current temperature. (Warmer air can hold more moisture.)
- The dew point is independent from the temperature, so it is effectively a measure of "absolute humidity."
- While both measurements have their advantages, I find dew point a better indicator of the "mugginess." Also it is easier to estimate the relative humidity given the dew point vs. estimate the dew point given the relative humidity.
- You can compare both here: https://weather-sense.leftium.com (humidity plot disabled, but the value can be checked by hovering.)