How Crowded Is Mount Rainier National Park in May?

May runs about 0.7× Mount Rainier 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 84,000 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 (3×) and the February low (0.1×).

On our Best Time to Visit score May rates 52/100 ("Fair") — the single best-rated month at Mount Rainier, balancing crowds against weather and daylight.

Typical May weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 48°F and an overnight low around 33°F, with about 5.1" of precipitation.

That average of about 41°F is cool, so layers and a shorter daylight window matter.

Because June, July and August together draw about 62% 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 14.8 hours of daylight in May to explore — between the 8.3-hour midwinter low and the 15.7-hour summer high.

Park-wide, 2025 drew 1,635,342 recreation visits, up 0.9% from 1,620,006 in 2024.

Across the past decade overall visitation has risen about 18.2%, so a May visit is likely to feel busier than it did a few years ago.