How Crowded Is Johnstown Flood in May?
May is a busy month at Johnstown Flood National Memorial, running about 1.6× the park's average month — roughly 13% 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 "Fair" for a visit. Typical May weather averages a high near 68°F and a low around 49°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 Johnstown Flood National Memorial (about 1.6× the average month). Our best-time score rates it "Fair". The single best month overall is June.
The busiest month is July and the quietest is January. May sits at about 1.6× the park's average, or 13% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.