There isn’t a universal understanding of what that means.
As other solo travellers have mentioned, August is the beginning of hurricane season in the Caribbean. I’ve been in August and can say I was lucky as I only went through one full day of torrential rains,(in Grenada );but very high humidity. Same thing happened in Mexico, and Florida. A few thoughts about ‘5 star’. There isn’t a universal understanding of what that means. It’s not a common standard, as the term can apply only to the definition given by the individual local tourist authority.