Men wear slacks more often than jeans, although jeans are acceptable, just as button down shirts are more prevalent than T-shirts. You should probably take along at least two pair of comfortable shoes with closed toe. Athletic or tennis shoes are well accepted, yet you might not want to bring your best pair since they will get dirty. Other welcome items to have along are a rain poncho, light jacket, sweatshirt, etc. Leaving your box behind when you depart Haiti would be a nice gesture.
Tropical weather is unpredictable, yet generally stable.
As a guest of the country, it would be best if you prepared and dressed appropriately for the culture. It is breezy in the mountains, and cooler by the water. The climate is tropical, yet it can vary greatly from region to region. On the western tip of the southern peninsula, rainfall can reach up to 144 inches annually, while only some 24 inches is received on the southwest coast of the northern peninsula. Most of Haiti's roads are in ill repair, bordering on non-existent as far as American standards are concerned.