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), days average 40°F with 9.3 hours of daylight. Computed from NPS and NOAA data.

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 →

Crowds in December

Lassen Volcanic averages 6,677 recreation visits in December — 6% of what July, the peak month, draws — the quietest month of the year. That crowd level sets the tone for parking, permits and lodging — this is genuine quiet-season territory.

Average visits (December)

6,677 (mean 2021–2025, NPS)

Share of the year

1.6% of annual visitation

vs. peak (July)

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.

Insulated jacket, beanie and gloves — nights average 22°F, below freezing
Rain shell + pack cover — 6.5″ of precipitation is normal this month
Headlamp — only 9.3 hours of daylight in mid-December
Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month

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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:

American Samoa in December — 17% of peak crowds, highs 88°F, score 66/100
Everglades in December — 72% of peak crowds, highs 80°F, score 64/100
Biscayne in December — 77% of peak crowds, highs 80°F, score 62/100

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).

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).

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.

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.

See also: the best national parks to visit in December · Last verified 2026-09-12