How Crowded Is Lassen Volcanic National Park in May?

May runs about 0.8× Lassen Volcanic National Park's average month, which makes it a quiet month here — roughly 6% of the park's yearly visitors come in May.

In a typical May the park sees about 30,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes May the 6th-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 May rates 61/100 ("Good") — the single best-rated month at Lassen Volcanic, balancing crowds against weather and daylight.

Typical May weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 61°F and an overnight low around 35°F, with about 2.9" of precipitation.

That average of about 48°F is cool, so layers and a shorter daylight window matter.

Because June, July and August together draw about 57% of annual visitors, choosing May instead steps outside that summer crush — the single biggest lever on how crowded the park feels.

You'll have about 14.3 hours of daylight in May 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 May may feel a touch quieter than it once did.