Originally Posted by
Sy Reene
Yup, whatever works, though it seems to me that if there was someone or company motivated to do so, there probably could exist some scientific test that could be conducted that yields a real answer.
A couple of different mechanisms at play; I think the most important is evaporative cooling. Lifted from the web:
evaporative coolingreduction in temperature resulting from the evaporation of a liquid, which removes latent heat from the surface from which evaporation takes place.
Cooling effect works best (largest temperature drop) when the air is driest, which is why it doesn't work so well where it's humid.