Answer:
The water would be up around your waist or chest, but you'd still be able to breathe.
Step-by-step explanation:
The average precipitation in the world is 100 cm (39 inches). If that is the amount that fell on a typical surface in central Pennsylvania and stayed there as a layer of water, it would be higher than toes or ankles reaching up to waist or chest depending on the person's height. A SCUBA gear or a snorkel would not be necessary since the average person is taller than 100 cm or 39 inches.