I was thinking overall heat and discomfort, plus being an ugly dress.
Actually not all that ugly. Reminds me a bit of some of the stuff my grandmother wore. But grandma's dresses were light prints in the summer, and topped with a bonnet most of the time.
But it does not look like something for even springtime in Texas. (Except this year, what with the effects of global warming and all, it's been a cool spring in most places)