Dry Tortugas National Park weather in September
September in Dry Tortugas National Park: sweltering, soaked, with clean air — a good time to visit.
#12 of 12 months in Dry Tortugas National Park · #510 of 604 destinations to visit in September · comfort 61/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Dry Tortugas National Park climate normals — September
| Daytime high | 29°C / 84°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 27°C / 81°F | |
| Feels like (high) | 34°C / 93°F | |
| Rainfall | 161 mm / 6.3 in | ⛈ soaked |
| Rainy days | 16 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 10.4 h/day | |
| Daylight | 12.3 h | |
| Wind | 23 km/h / 14 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Dry Tortugas National Park?
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Dry Tortugas National Park in September — FAQ
- Is September a good time to visit Dry Tortugas National Park?
- September in Dry Tortugas National Park: sweltering, soaked, with clean air — a good time to visit. It ranks #12 of 12 months for Dry Tortugas National Park on SeasonMap's comfort score (61/100).
- What is the weather like in Dry Tortugas National Park in September?
- In September, Dry Tortugas National Park averages a daily high of 28.9°C and a low of 27.2°C, with about 160.5 mm of rain over roughly 15.8 rainy days.
- What is the air quality in Dry Tortugas National Park in September?
- Dry Tortugas National Park has a mean US Air Quality Index of about 35 in September.