Just so you know Hurricane season in the Atlantic
begins June 1st and ends November 30th. The Eastern Pacific
hurricane season begins May 15th and also ends November 30th.
Therefore you won't see many posts in here outside of those months.
There are advantages to cruising during hurricane season - especially in the fall - cruise prices tend to be much lower.
Hurricane activity really picks up in August and peaks in September (historically) - but anything can happen at any time. August 20 to October 20 is the most active, with September 10th being the most active date historically for hurricanes.
If a hurricane should occur during your cruise you can count on the sip's itinerary to change in order to avoid the storm. No - there are no refunds for bad weather or missed ports of call. The cruise lines are not responsible for the weather.
If this bothers you (changing the itinerary) then you should buy travel insurance that covers hurricanes - however, be sure to read your policy carefully since "acts of God" are generally not covered by insurance.