Well yes it is hot and hurricane season. But those two words describe all of the summer months, and being the TROPICS, the Caribbean is almost always hot. So unless you are planning on limiting yourself to only winter crusies or to cruises to Alaska, why worry about it? The bigger issue is that those are peek cruise season and you will be paying top dollar for cruising then. If you are able to go at other times of the year, then you would be better off.
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007, Celebrity Silhouette 2013