Port-au-Prince weather in September
September in Port-au-Prince: hot, soaked, with very humid — a gamble, with 25 rainy days.
#11 of 12 months in Port-au-Prince · #830 of 897 destinations to visit in September · comfort 56/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Port-au-Prince in September
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Port-au-Prince climate normals — September
| Daytime high | 32°C / 90°F | 🥵 hot |
|---|---|---|
| Nighttime low | 26°C / 78°F | |
| Rainfall | 227 mm / 8.9 in | ⛈ soaked |
| Rainy days | 25 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 25°C / 76°F | |
| Sunshine | 10.8 h/day | |
| Daylight | 12.2 h | |
| Wind | 6 km/h / 3 mph | |
| Air quality (US AQI) | 78 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Port-au-Prince in September — FAQ
- Is September a good time to visit Port-au-Prince?
- September in Port-au-Prince: hot, soaked, with very humid — a gamble, with 25 rainy days. It ranks #11 of 12 months for Port-au-Prince on SeasonMap's comfort score (56/100).
- What is the weather like in Port-au-Prince in September?
- In September, Port-au-Prince averages a daily high of 32.3°C and a low of 25.6°C, with about 227.1 mm of rain over roughly 25.2 rainy days.
- What is the air quality in Port-au-Prince in September?
- Port-au-Prince has a mean US Air Quality Index of about 78 in September.