How Crowded Is Thaddeus Kosciuszko in December?
December is a quiet month at Thaddeus Kosciuszko National Memorial, running about 0.6× the park's average month — roughly 5% of the year's visitors come in December. That puts it between the July peak and the January low. Overall our best-time score rates December as "Poor" for a visit. Typical December weather averages a high near 47°F and a low around 33°F, with about 4.3" of precipitation and roughly 3.5" of snow. You'll get about 9.2 hours of daylight to explore.
Frequently Asked Questions
December is quiet at Thaddeus Kosciuszko National Memorial (about 0.6× the average month). Our best-time score rates it "Poor". The single best month overall is October.
The busiest month is July and the quietest is January. December sits at about 0.6× the park's average, or 5% of annual visitation.
Source: National Park Service Visitor Use Statistics (1981–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.