Biscayne National Park in September
In September, Biscayne National Park averages a high of 90°F and a low of 79°F, with 7.5 inches of precipitation (rain plus melted snow). About 42,000 people visit, the 8th busiest of 12 (busy). Days are 12 hours 16 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 90° / 79°F
- Precipitation
- 7.5in
- Snow
- 0in
- Daylight
- 12h 16m
- Visitors
- 42,000
- Crowds
- Busy
Best months for weather and crowds instead: January (busy), February (busy) and December (busy).
Weather 1991–2020 averages at Cape Florida, FL, 14.5 miles from the park's center, 6 ft. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in September
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Everglades National Park | 89° / 75° | Moderate | Hot |
| Big Cypress National Preserve | 90° / 73° | Moderate | Hot |
| Dry Tortugas National Park | 89° / 78° | Busy | Hot |
| Canaveral National Seashore | 88° / 71° | Busy | Hot |
| Timucuan Ecological and Historic Preserve | 86° / 73° | Busy | Hot |
Closures, reservations and alerts: Biscayne National Park on nps.gov
All twelve months at Biscayne · National parks to visit in September