How Crowded Is Lassen Volcanic in December?
December is a very quiet month at Lassen Volcanic National Park, running about 0.2× the park's average month — roughly 2% of the year's visitors come in December. That puts it between the July peak and the February low. Overall our best-time score rates December as "Poor" for a visit. Typical December weather averages a high near 40°F and a low around 22°F, with about 6.5" of precipitation. You'll get about 9.1 hours of daylight to explore.
Frequently Asked Questions
December is very quiet at Lassen Volcanic National Park (about 0.2× the average month). Our best-time score rates it "Poor". The single best month overall is May.
The busiest month is July and the quietest is February. December sits at about 0.2× the park's average, or 2% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.