The relative humidity is 100%, and the temperature is hot. in a few sentences, explain how the weather would change if the temperature drops and becomes cool.
in a few sentences , explain.

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

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.