Fountains often used to cool enclosed courtyards of houses in hot and dry countries. How does a fountain help lower the temperature of a
courtyard? (Hint: evaporation requires energy)

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but