If you're looking for summer vibes, the best time to travel to Cap Haitien is in July, August and September, when the average temperature reaches 30.89 °C, while April, March and July are the 3 sunniest months of the year, with an average of 134.34 hours.
However, if you prefer colder temperatures, make sure you visit Cap Haitien during January, February or March to experience an average of 21.99 °C.
For those who don't care too much about temperatures, but want to avoid getting wet in the rain, it's important to avoid travelling during March, June and December, when the average precipitation in Cap Haitien is 3.23 mm, while the months of January, February and March are drier, with an average of 0 mm.