Cap-Haïtien weather in September
September in Cap-Haïtien: sweltering, rainy, with clean air — an excellent time to visit.
#8 of 12 months in Cap-Haïtien · #215 of 604 destinations to visit in September · comfort 84/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Cap-Haïtien climate normals — September
| Daytime high | 30°C / 85°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 26°C / 79°F | |
| Feels like (high) | 36°C / 97°F | |
| Rainfall | 95 mm / 3.7 in | 🌧 rainy |
| Rainy days | 19 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 25°C / 76°F | |
| Sunshine | 11 h/day | |
| Daylight | 12.2 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 47 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Cap-Haïtien?
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Cap-Haïtien in September — FAQ
- Is September a good time to visit Cap-Haïtien?
- September in Cap-Haïtien: sweltering, rainy, with clean air — an excellent time to visit. It ranks #8 of 12 months for Cap-Haïtien on SeasonMap's comfort score (84/100).
- What is the weather like in Cap-Haïtien in September?
- In September, Cap-Haïtien averages a daily high of 29.7°C and a low of 25.9°C, with about 94.6 mm of rain over roughly 19.4 rainy days.
- What is the air quality in Cap-Haïtien in September?
- Cap-Haïtien has a mean US Air Quality Index of about 47 in September.