Hi Katherine,
When it's hot and steamy/humid here, it gets more tolerable after a rain. The temps will drop, and the humidity will decrease, sometimes by a great deal.
I remember one time it was about 95 degrees, and after a hard downpour, it had dropped to almost 80.
Not to be all know-it-ally (or more so than usual, anyway

) and I could be wrong. But I think it's the temperature change that brings the rain as opposed to the other way around, right?
Isn't it, like, two different fronts with different temperatures and humidity levels bumping into each other that produces rain? That's what I've always thought, anyway. The same thing happens with snow. A snowstorm might arrive on a relatively warm day, but the next day it's usually really cold.
But I'm no expert. I'm not even entirely sure what a "front" is, other than a big mass of a certain kind of weather, or why clashing fronts would produce weather unrest.