Santo Domingo weather in September
September in Santo Domingo: sweltering, rainy, with clean air — a good time to visit.
#10 of 12 months in Santo Domingo · #443 of 604 destinations to visit in September · comfort 68/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Santo Domingo climate normals — September
| Daytime high | 31°C / 87°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 24°C / 75°F | |
| Feels like (high) | 36°C / 97°F | |
| Rainfall | 88 mm / 3.5 in | 🌧 rainy |
| Rainy days | 20 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 23°C / 74°F | |
| Sunshine | 10.4 h/day | |
| Daylight | 12.2 h | |
| Wind | 12 km/h / 7 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 Santo Domingo?
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Santo Domingo in September — FAQ
- Is September a good time to visit Santo Domingo?
- September in Santo Domingo: sweltering, rainy, with clean air — a good time to visit. It ranks #10 of 12 months for Santo Domingo on SeasonMap's comfort score (68/100).
- What is the weather like in Santo Domingo in September?
- In September, Santo Domingo averages a daily high of 30.7°C and a low of 23.9°C, with about 87.7 mm of rain over roughly 20 rainy days.
- What is the air quality in Santo Domingo in September?
- Santo Domingo has a mean US Air Quality Index of about 47 in September.