I live in Adelaide Yorke peninsula, I’ve been in Thailand since April this year, Pattaya & Jontiem area, it was hot but really no different to Adelaide on hot days, the locals were telling us to be careful when going out! But I honestly didn’t notice any difference, long as your sensible and drink plenty, stay in the shade etc as much as possible, I’m sure you will be fine, I actually don’t mind the humidity better than the dry air on the peninsula where I struggle with breathing cause of dust etc Good luck your going to love your new life here 😊