Climatology
A total of 95 hurricanes in the Atlantic Ocean Basin, including the Gulf of Mexico and the Caribbean, have reached Category 4 status as their peak intensity. (Note that Category 4 storms that intensified later to Category 5 status are not included in this analysis.)
Most Category 4 hurricanes occur during September, with 51 storms occurring in that month. This coincides with the average peak of the Atlantic hurricane season, which occurs on September 10. Most Category 4 hurricanes develop in the warm waters of the Gulf of Mexico and the Caribbean Sea. Several Category 4 hurricanes are Cape Verde-type hurricanes. There have been no Category 4 hurricanes to form in either May or December, or in any other month outside the traditional bounds of the Atlantic hurricane season.
Read more about this topic: List Of Category 4 Atlantic Hurricanes