Lassen Volcanic National Park in September
In September, Lassen Volcanic National Park averages a high of 72°F and a low of 41°F, with 0.7 inches of precipitation (rain plus melted snow). About 66,000 people visit, the 4th 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
- 72° / 41°F
- Precipitation
- 0.7in
- Snow
- –in
- Daylight
- 12h 25m
- Visitors
- 66,000
- 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: Burney, CA at 3,198 ft averages a September high of 82°F and a low of 38°F.
Weather 1991–2020 averages at Manzanita Lake, CA, 9.5 miles from the park's center, 5,750 ft. Second station lower down: Burney, CA, 3,198 ft, 29.5 miles. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in September
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Redwood National Park | 67° / 50° | Busy | Mild |
| Crater Lake National Park | 63° / 37° | Moderate | Mild |
| Point Reyes National Seashore | 66° / 51° | Very busy | Mild |
| Golden Gate National Recreation Area | 82° / 53° | Very busy | Hot |
| San Francisco Maritime National Historical Park | 70° / 56° | Busy | Mild |
Closures, reservations and alerts: Lassen Volcanic National Park on nps.gov
All twelve months at Lassen Volcanic · National parks to visit in September