Wörterbuch (en): Humidity / Air humidity
de: 
Luftfeuchtigkeit (f) / Luftfeuchte (f) 
fr: 
Humidité (f) / Humidité de l'air (f) / Humidité atmosphérique (f) 
it: 
Umidità dell'aria (f) 
es: 
Humedad (f) / Humedad del aire (f) 
pt: 
Humidade do ar (f) / Umidade (f) / Humidade (f) 
The proportion of water vapour in the gas mixture of the air. Liquid water or ice are therefore not included in the air humidity.