I am in Tx so we share some of the same weather -
regardless of carry method you choose to go with you are going to have to make changes to your wardrobe. I find that using an extra heavy weight shirt (t-shirt, polo etc) with normal size pants, gun specific belt, and a good owb holster works well for me - and I do not have to purchase different size pants or shorts. The belt will make a huge difference in your happiness, a lesson learned the hard way.
I carried a g23 for many many years with this set up and use it now for a g30 in our shared weather
Texas DPS Certified CHL Instructor
NRA Pistol Instructor