How Crowded Is Thaddeus Kosciuszko in May?
May is a busy month at Thaddeus Kosciuszko National Memorial, running about 1.3× the park's average month — roughly 10% of the year's visitors come in May. That puts it between the July peak and the January low. Overall our best-time score rates May as "Good" for a visit. Typical May weather averages a high near 76°F and a low around 56°F, with about 4.1" of precipitation. You'll get about 14.2 hours of daylight to explore.
Frequently Asked Questions
May is busy at Thaddeus Kosciuszko National Memorial (about 1.3× the average month). Our best-time score rates it "Good". The single best month overall is October.
The busiest month is July and the quietest is January. May sits at about 1.3× the park's average, or 10% of annual visitation.
Source: National Park Service Visitor Use Statistics (1981–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.