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Lassen Volcanic in December: Crowds, Weather & What to Pack

Harsh season · VisitWhen score 28/100 · #12 of 12 months

December is a harsh-season month at Lassen Volcanic National Park: crowds run 6% of the July peak (6,677 average visits). Weather: highs average 40°F and lows 22°F, with 6.5″ of precipitation and 9.3 hours of daylight. Headline access is typically closed this month — see the access warning below. Computed from NPS and NOAA data.

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Bring for Lassen Volcanic in December

  1. Insulated jacket, beanie and glovesSee it on AmazonWhy: nights average 22°F, below freezing.
  2. Rain shell + pack coverSee it on AmazonWhy: 6.5″ of precipitation is normal this month.
  3. HeadlampSee it on AmazonWhy: only 9.3 hours of daylight in mid-December.

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Access warning: The main park highway is typically closed by snow from November until June (sometimes July after big snow years). That typically affects December — verify before planning. Current NPS conditions →

Lassen Volcanic in December: what the park service says

December brings Lassen's winter closure: the park highway shuts for snow in the fall and stays closed through the season, and the park's mapped winter routes start from the Southwest Area and the Manzanita Lake Area. The park describes oversnow travel as risky and asks visitors to learn about avalanche safety and remote-area travel first. Leashed pets may wait in parking areas but not on snow-covered routes.

Source: NPS 1, NPS 2, checked 2026-11-05.

A frozen lake below snow-covered trees and peak
Lassen Volcanic National Park — photo: NPS Photo / Scott Arnaz (public-domain NPS media)

Crowds in December

Lassen Volcanic averages 6,677 recreation visits in December — 6% of what July, the peak month, draws — this is the quietest month of the year. That crowd level sets the tone for parking, permits and lodging — crowds are thin by this park's standards.

Average visits (December)
6,677 (mean 2021–2025, NPS)
Share of the year
1.6% of annual visitation
vs. peak (July)
6%

Weather & daylight

It is properly cold (highs average 40°F), and nights drop below freezing (lows average 22°F). This is one of the wetter months (6.5″ of precipitation on average). Mid-month daylight runs 9.3 hours.

NOAA 1991–2020 monthly normals, station MANZANITA LAKE, CA US (8 mi from park coordinates, 5,750 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of December.

What to pack for Lassen Volcanic in December

Computed from the month's weather normals above — not a generic list.

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Want quieter or kinder conditions? The computed best months for Lassen Volcanic are August and September.

Also at their best in December

Other parks whose computed December verdict is a best window — same NPS × NOAA formula:

Common questions

Is Lassen Volcanic crowded in December?

No — December is one of the quieter months: 6% of the July peak, averaging 6,677 visits (NPS, 2021–2025). See every month at Lassen Volcanic.

What is the weather like in Lassen Volcanic in December?

Average highs of 40°F, lows of 22°F, 6.5″ of precipitation (NOAA 1991–2020 normals, MANZANITA LAKE, CA US station). Compare it with other national parks in December.

What should I pack for Lassen Volcanic in December?

Insulated jacket, beanie and gloves; Rain shell + pack cover; Headlamp — the full weather-computed list is on this page. Going in January instead? Lassen Volcanic in January has its own list.

Is everything open at Lassen Volcanic in December?

The main park highway is typically closed by snow from November until June (sometimes July after big snow years). Always check the park's live NPS alerts for current conditions.

← Lassen Volcanic in November All months Lassen Volcanic in January →

See also: the best national parks to visit in December · Last verified 2026-09-24

Also check in December

The nearest other parks that are not closed or rated Harsh in December, with the same NPS × NOAA verdict. Distance is a straight line.