Channel Islands National Park in September
In September, Channel Islands National Park averages a high of 78°F and a low of 60°F, with 0.1 inches of precipitation (rain plus melted snow). About 23,000 people visit, the 6th busiest of 12 (busy). Days are 12 hours 21 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 78° / 60°F
- Precipitation
- 0.1in
- Snow
- 0in
- Daylight
- 12h 21m
- Visitors
- 23,000
- Crowds
- Busy
September is one of the best months to visit: mild weather with busy crowds.
Weather 1991–2020 averages at Santa Barbara, CA, 27.5 miles from the park's center, 16 ft. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in September
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Sequoia National Park | 70° / 39° | Busy | Mild |
| Pinnacles National Park | 92° / 48° | Moderate | Very hot |
| Kings Canyon National Park | 70° / 39° | Busy | Mild |
| Joshua Tree National Park | 97° / 69° | Moderate | Very hot |
| Death Valley National Park | 108° / 79° | Moderate | Very hot |
Closures, reservations and alerts: Channel Islands National Park on nps.gov
All twelve months at Channel Islands · National parks to visit in September