Answer:
The climate in the Caribbean is tropical and therefore year-round warm to hot, with one or two distinct wet seasons per year. Note that, in the islands and in Belize, the wet season generally coincides with the Atlantic hurricane season, officially running from June 1st till November 30th of each year.
temperatures fairly constant throughout the year; annual temperature range of less than 2oC (extreme south) to about 5 oC (high elevations in far north).
one dry and one wet season each year (except in the Guianas); wet season runs from May/June to November/December, dry season during the other half year; wet season coincides with the hurricane season, due to similar drivers.
heat stress much higher during wet season, especially during dry spells (no relief from intensely humid heat by rain and cloudiness); lower during breezy, cooler dry season.
wet/hurricane season drivers include (i) migration of the Hadley Cell and the Inter-tropical Convergence Zone (ITCZ) from 2-5°N in March to 12-15°N in September; (ii) resulting change in strength and northward migration of the sub-tropical (Bermuda-Azores) High Pressure; (iii) sea surface temperature (SST) generally 27-30°C; (iv) migrating tropical waves and other disturbances, which can strengthen and develop to form tropical cyclones, including hurricanes.
peak of wet and hurricane seasons around September/October when SSTs are highest in ITCZ at its most notherly position.
migrating ITCZ main reason for double rainfall peaks in the Guianas (May-July & November-January).
dry season triggered by southward migration of the Hadley cell, the subtropical high and the ITCZ, as a more stable atmosphere develops; February-April heart of the season. Most of dry season rainfall is the north associated with passage or stalling of cold fronts, with remnants of the fronts providing rainfall to the eastern Caribbean.
Sheesh that was a lot to type
