Lassen Volcanic National Park in September
September at Lassen Volcanic National Park averages a daytime high near 72°F and an overnight low around 41°F, with about 0.7" of precipitation. Visitation runs about 1.8× the park's average month, which makes September a very busy month here.
- Average low
- 41°F
- Average high
- 72°F
Range across the year: 22°F to 79°F
- Precipitation
- 0.7 in
- Daylight
- 12.3 hours
Roughly 15% of the park's yearly visitors come in September: about 71,000 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 3rd-busiest of the park's twelve months, sitting between the July peak (2.8×) and the February low (0.2×).
On our Best Time to Visit score September rates 54/100 ("Fair"). Our recommended month is June: the lightest crowds of the park's good-weather months.
The daily average of about 57°F is a comfortable range for hiking and being outdoors all day. These figures are 1991–2020 NOAA climate normals from the nearest station, about 9.5 miles from the park.
Because June, July and August together draw about 57% of annual visitors, choosing September instead steps outside that summer crush — the single biggest lever on how crowded the park feels.
You'll have about 12.3 hours of daylight in September to explore — between the 9.1-hour midwinter low and the 14.9-hour summer high.
Park-wide, 2025 drew 504,777 recreation visits, up 41.1% from 357,651 in 2024.
Across the past decade overall visitation has eased about 8.1%, so September may feel a touch quieter than it once did.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 78°F / 45°F | 2.3× Very busy | 55 Fair |
| September | 72°F / 41°F | 1.8× Very busy | 54 Fair |
| October | 59°F / 33°F | 1.2× Busy | 46 Fair |
All twelve months at Lassen Volcanic, with the best time to visit.
Seasonal closures in September 2027
The National Park Service lists these Lassen Volcanic facilities as closed during September 2027. The dates are the park's own, read on October 11, 2026. A facility that is not listed here may still be closed, so confirm on the park's site before you go.
- Manzanita Lake Campground (campground): closed all month (April 16, 2027 to October 6, 2027)
Things to do at Lassen Volcanic in September
The National Park Service tags 11 Lassen Volcanic activities for fall. Here are 8 of them. Each links to the park's own page for it.
- Drive Lassen Volcanic National Park Highway · 60 minutes
- Fish Butte Lake · 0-0 minutes
- Fish Manzanita Lake · 0-10 hours
- Hike Lassen Peak · 4-5 hours
- Hike to Bumpass Hell · 90 minutes
- Hike to Kings Creek Falls · 90 minutes
- Walk Devastated Area Interpretive Trail · 15 minutes
- Hike Reflection Lake Loop · 15-30 minutes
Frequently Asked Questions
September averages a daytime high near 72°F and an overnight low around 41°F at Lassen Volcanic National Park, with about 0.7 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 9.5 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is very busy at Lassen Volcanic National Park (about 1.8× the average month). Our best-time score rates it "Fair" at 54/100. Our recommended month is June.
The busiest month is July and the quietest is February. September sits at about 1.8× the park's average, or 15% of annual visitation.
A typical September sees about 71,000 recreation visits at Lassen Volcanic National Park, based on National Park Service monthly counts from 1979–2025.
Where to stay near Lassen Volcanic in September
Booking a September trip to Lassen Volcanic National Park? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Lassen Volcanic
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Visiting Lassen Volcanic in September?
Get crowd forecasts and lodging deals for Lassen Volcanic by email. No spam, unsubscribe anytime.
See the full ranking of the best national parks to visit in September.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.