as it is in July, Aug and MOSTLY September. September is the hottest we have in Florida in our opinion. One can only believe that the further south one goes the more that is true.
Hope this helps a little. May is not COOL by any means but it is not unbearably HOT yet either
ABeing a Florida Resident since 1989 one thing you can count on in Florida in May is RAIN. And in Mar, April June July ..... we are after all, the SUNSHINE State. Lucky your cruise takes you away from here.