Relative Silence | Humidity | humidity | Relative direction | Relative key | List of mountains of the British Isles by relative height |
However, water vapor content is usually measured in terms of mixing ratio (mass fraction) in reanalyses or dew point (temperature to partial vapor pressure saturation, i.e. relative humidity to 100%) in operational forecasting.
It blows from an easterly direction in autumn, winter and spring, rarely in summer, and is of intense dryness, sometimes reducing the relative humidity at Funchal to below20%.
The ISO 9660 standard specifies a stable room temperature of 18 - 23 °C with relative humidity of 30% to 50%.