Castle Clinton National Monument in September
In September, Castle Clinton National Monument averages a high of 76°F and a low of 62°F, with 4.3 inches of precipitation (rain plus melted snow). About 280,000 people visit, the 7th busiest of 12 (busy). Days are 12 hours 25 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 76° / 62°F
- Precipitation
- 4.3in
- Snow
- 0in
- Daylight
- 12h 25m
- Visitors
- 280,000
- Crowds
- Busy
Best months for weather and crowds instead: April (busy) and May (busy).
Weather 1991–2020 averages at New York Cntrl Pk Twr, NY, 5.8 miles from the park's center, 130 ft. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in September
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Statue of Liberty National Monument | 76° / 62° | Moderate | Mild, wet |
| Stonewall National Monument | 76° / 62° | Few or no visits | Mild, wet |
| Gateway National Recreation Area | 76° / 61° | Busy | Mild |
| Delaware Water Gap National Recreation Area | 74° / 52° | Very busy | Mild, wet |
| Independence National Historical Park | 80° / 63° | Busy | Hot |
Closures, reservations and alerts: Castle Clinton National Monument on nps.gov
All twelve months at Castle Clinton National Monument · National parks to visit in September