Why dew point is useful
Dew point is often more useful than relative humidity for comfort because it expresses actual moisture content. Higher dew points generally feel more humid.
Example
At 25 C and 60% relative humidity, the dew point is about 16.7 C using the Magnus approximation.
Common mistakes
Relative humidity changes with temperature. Two days with the same relative humidity can feel different if their dew points are different.
Limitations
This is an approximation for ordinary weather and comfort use. It is not a substitute for calibrated meteorological, HVAC or industrial humidity measurement.
Last reviewed: 2026-05-17