Baymule, Swiss Chard is one of those very versatile plants that is tough as nails in a lot of conditions.
I'm pretty sure it'll do well for you.
Swiss Chard grows more lush and beautiful in composty soil that is watered and grown as if it were Lettuce or Peas. But even with poor conditions it'll tough it out.
It seems to grow even when it does not get a lot of direct sun, but grows prettiest if it gets mostly sun with afternoon shade.
If you are growing it to be at its prettiest, a couple things to remember:
Each seed is actually between 1 and 4 seeds, usually 2 or 3, so when they are sprouting ya gotsta put the reading glasses on and pinch them to one per spot. 2 per spot is ok though.
Rainbow Chard variety is quite the deal. Some seed companies will say theirs is a carefully selected mix of separately grown colors, where most don't do that. I like the seed I got because it is the open pollinated mix, grown that way I'm sure. I have a couple plants, not yet photographed, that are growing very slow, and are smaller. Those 2 are the prettiest I think. Their color seems kind of bronzy, and they grow less vigorously, smaller. I kind of think a "Bronzy" selection, if it could be stabilized, would make a very nice variety of its own. I'll try to photograph them soon.