I wouldn't exactly call rain in central Florida "summer rain". At least not the summer rain i've experienced anywhere else. In central Florida, rain in the summer is a deluge of biblical proportions, with the sky opening up and releasing a wall of water (if you're driving, you will not be able to see, no matter how fast your windshield wipers are going)..
the torrential rains, which only last about an hour, if that long, are usually accompanied by a sound and light show that has to be seen to be believed.
I wouldn't call that a summer rain. But no, it doesn't last for hours. It's only an hour or two, and usually in the afternoon. And unlike other summer rains, it doesn't break the heat and humidity.