How Crowded Is Isle Royale National Park in December?

December runs about 0× Isle Royale National Park's average month, which makes it a very quiet month here — roughly 0% of the park's yearly visitors come in December.

In a typical December the park sees about 40 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes December the 8th-busiest of the park's twelve months, sitting between the August peak (4.2×) and the January low (0×).

On our Best Time to Visit score December rates 40/100 ("Poor"), versus the top-rated May at 66/100 — best overall balance of crowds, weather and daylight.

Typical December weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 26°F and an overnight low around 9°F, with about 1.7" of precipitation and roughly 12" of snow.

That average of about 18°F is cold, with winter conditions likely on higher ground.

Because June, July and August together draw about 83% 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 8.2 hours of daylight in December to explore — near the year-round minimum.

Park-wide, 2019 drew 26,410 recreation visits, up 2.4% from 25,798 in 2018.

Across the past decade overall visitation has risen about 56.7%, so a December visit is likely to feel busier than it did a few years ago.