Nassau weather in September
September in Nassau: sweltering, rainy, with clean air — an excellent time to visit.
#9 of 12 months in Nassau · #310 of 604 destinations to visit in September · comfort 80/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Nassau climate normals — September
| Daytime high | 29°C / 85°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 27°C / 80°F | |
| Feels like (high) | 34°C / 93°F | |
| Rainfall | 142 mm / 5.6 in | 🌧 rainy |
| Rainy days | 15 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 23°C / 74°F | |
| Sunshine | 10.5 h/day | |
| Daylight | 12.3 h | |
| Wind | 24 km/h / 15 mph | |
| Air quality (US AQI) | 30 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Nassau in September — FAQ
- Is September a good time to visit Nassau?
- September in Nassau: sweltering, rainy, with clean air — an excellent time to visit. It ranks #9 of 12 months for Nassau on SeasonMap's comfort score (80/100).
- What is the weather like in Nassau in September?
- In September, Nassau averages a daily high of 29.4°C and a low of 26.9°C, with about 141.9 mm of rain over roughly 15.2 rainy days.
- What is the air quality in Nassau in September?
- Nassau has a mean US Air Quality Index of about 30 in September.