San Francisco Maritime National Historical Park in September
In September, San Francisco Maritime National Historical Park averages a high of 70°F and a low of 56°F, with 0.1 inches of precipitation (rain plus melted snow). About 203,000 people visit, the 5th busiest of 12 (busy). Days are 12 hours 23 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 70° / 56°F
- Precipitation
- 0.1in
- Snow
- –in
- Daylight
- 12h 23m
- Visitors
- 203,000
- Crowds
- Busy
September is one of the best months to visit: mild weather with busy crowds.
Higher or lower in the park, expect a different picture: Mt Diablo Junction, CA at 2,170 ft averages a September high of 80°F and a low of 60°F.
Weather 1991–2020 averages at San Francisco Dwtn, CA, 2.8 miles from the park's center, 150 ft. Second station higher up: Mt Diablo Junction, CA, 2,170 ft, 27.3 miles. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in September
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Fort Point National Historic Site | 70° / 56° | Very busy | Mild |
| Golden Gate National Recreation Area | 82° / 53° | Very busy | Hot |
| Point Reyes National Seashore | 66° / 51° | Very busy | Mild |
| Pinnacles National Park | 92° / 48° | Moderate | Very hot |
| Yosemite National Park | 83° / 51° | Very busy | Hot |
Closures, reservations and alerts: San Francisco Maritime National Historical Park on nps.gov
All twelve months at San Francisco Maritime National Historical Park · National parks to visit in September