Relative humidity depends on temperature
It compares actual water vapour with the amount associated with saturation at that temperature.
Dew point tracks moisture more directly
It is the temperature to which air must cool to reach saturation under specified conditions.
Cooling can raise relative humidity
The amount of water vapour can stay the same while relative humidity increases.
Condensation appears at surfaces or in clouds
When air reaches saturation, liquid droplets or ice can form under suitable conditions.
Source trail: NOAA: weather & atmosphere
This page explains scientific concepts for general learning. It does not replace laboratory safety procedures, professional engineering guidance, or individualized medical advice.