relative_humidity_from_dewpoint

metpy.calc.relative_humidity_from_dewpoint(temperature, dewpoint)

Calculate the relative humidity.

Uses temperature and dewpoint to calculate relative humidity as the ratio of vapor pressure to saturation vapor pressures.

Parameters

• temperature (pint.Quantity) – Air temperature

• dewpoint (pint.Quantity) – Dewpoint temperature

Returns

pint.Quantity – Relative humidity

Examples

>>> from metpy.calc import relative_humidity_from_dewpoint
>>> from metpy.units import units
>>> relative_humidity_from_dewpoint(25 * units.degC, 12 * units.degC).to('percent')
<Quantity(44.2484765, 'percent')>

See also

saturation_vapor_pressure

Notes

\[rh = \frac{e(T_d)}{e_s(T)}\]

Changed in version 1.0: Renamed dewpt parameter to dewpoint

Examples using metpy.calc.relative_humidity_from_dewpoint

Hydrostatic Thickness

Hydrostatic Thickness

previous

psychrometric_vapor_pressure_wet

next

relative_humidity_from_mixing_ratio