How Crowded Is Whitman Mission National Historic Site in December?

December runs about 0.3× Whitman Mission National Historic Site's average month, which makes it a very quiet month here — roughly 3% of the park's yearly visitors come in December.

In a typical December the park sees roughly 1,300 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

It is the quietest month of the year at Whitman Mission; by contrast May, the busiest, runs about 1.7× the average — so December is the easiest time to have the place largely to yourself.

On our Best Time to Visit score December rates 45/100 ("Fair"), versus the top-rated August at 71/100 — pleasant weather with noticeably thinner crowds (shoulder season).

Typical December weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 41°F and an overnight low around 27°F, with about 1.7" of precipitation.

That average of about 34°F is cold, with winter conditions likely on higher ground.

Because June, July and August together draw about 33% of annual visitors, choosing December instead steps outside that summer crush — the single biggest lever on how crowded the park feels.

You'll have about 8.5 hours of daylight in December to explore — near the year-round minimum.

Park-wide, 2025 drew 54,089 recreation visits, down 11.8% from 61,331 in 2024.

Across the past decade overall visitation has risen about 12.1%, so a December visit is likely to feel busier than it did a few years ago.