Natasha, I haven'r been here quite as long as you have, but almost. It seems like this discussion occurs every year. As you so clearly stated, this isn't the rainy season. Everyone who has doubts, check the stats!
https://focusonmexico.com/seasons-temperatures/
I pick June 13! I pick it every year. Guess what? Sometimes I am correct. About every 5 or 6 years or so!