Method: WeatherData::Weather#vapour_pressure

Defined in:
lib/weather_data/weather.rb

#vapour_pressure ⇒ Object 



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# File 'lib/weather_data/weather.rb', line 52

def vapour_pressure
  if humidity
    t = temperature.to_celsius.degrees
    (humidity / 100.0) * 6.105 * Math.exp(17.27 * t / (237.7 + t))
  end
end