Best Time to Visit World War I Memorial

World War I Memorial is a unit of the National Park System in DC and a moderately visited park, drawing about 839,000 recreation visits in 2025. Visitation has held fairly steady over the past decade. Crowds concentrate sharply by season: April is the busiest month at about 1.5× the park's average month, while January is the calmest at roughly 0.4× — a 4-to-1 swing between high and low season. Roughly 27% of the year's visitors arrive in the three summer months of June, July and August alone, so timing a trip outside that window is the single biggest lever on how crowded the park feels. If avoiding people matters most, January offers the thinnest crowds of the year, though you'll trade some warmth and daylight for the solitude. Daylight ranges from about 9.3 hours in midwinter to 14.7 hours near the summer solstice, which shapes how much ground you can cover in a day. These crowd figures are drawn from 2021–2025 of National Park Service visitor-use records, and are updated as new monthly data is released.