Other facts from our historical weather data: Which is the warmest month in Cap-Haïtien? August has an average maximum temperature of 30°C (86°F) and is the warmest month of the year. Which is the coldest month in Cap-Haïtien? The coldest month is February with an average maximum temperature of 27°C (81°F). Which is the wettest month in Cap-Haïtien? November tops the wettest month list with 147mm (5.8 in) of rainfall. Which is the driest month in Cap-Haïtien? July is the driest month with 58mm (2.3 in) of precipitation. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.